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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /layout/style/nsRuleNode.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'layout/style/nsRuleNode.cpp')
-rw-r--r--layout/style/nsRuleNode.cpp10736
1 files changed, 10736 insertions, 0 deletions
diff --git a/layout/style/nsRuleNode.cpp b/layout/style/nsRuleNode.cpp
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=78: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * a node in the lexicographic tree of rules that match an element,
+ * responsible for converting the rules' information into computed style
+ */
+
+#include <algorithm>
+
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/DebugOnly.h"
+#include "mozilla/Function.h"
+#include "mozilla/dom/AnimationEffectReadOnlyBinding.h" // for PlaybackDirection
+#include "mozilla/Likely.h"
+#include "mozilla/LookAndFeel.h"
+#include "mozilla/OperatorNewExtensions.h"
+#include "mozilla/Unused.h"
+
+#include "mozilla/css/Declaration.h"
+
+#include "nsAlgorithm.h" // for clamped()
+#include "nsRuleNode.h"
+#include "nscore.h"
+#include "nsIWidget.h"
+#include "nsIPresShell.h"
+#include "nsFontMetrics.h"
+#include "gfxFont.h"
+#include "nsCSSAnonBoxes.h"
+#include "nsCSSPseudoElements.h"
+#include "nsThemeConstants.h"
+#include "PLDHashTable.h"
+#include "nsStyleContext.h"
+#include "nsStyleSet.h"
+#include "nsStyleStruct.h"
+#include "nsSize.h"
+#include "nsRuleData.h"
+#include "nsIStyleRule.h"
+#include "nsBidiUtils.h"
+#include "nsStyleStructInlines.h"
+#include "nsCSSProps.h"
+#include "nsTArray.h"
+#include "nsContentUtils.h"
+#include "CSSCalc.h"
+#include "nsPrintfCString.h"
+#include "nsRenderingContext.h"
+#include "nsStyleUtil.h"
+#include "nsIDocument.h"
+#include "prtime.h"
+#include "CSSVariableResolver.h"
+#include "nsCSSParser.h"
+#include "CounterStyleManager.h"
+#include "nsCSSPropertyIDSet.h"
+#include "mozilla/RuleNodeCacheConditions.h"
+#include "nsDeviceContext.h"
+#include "nsQueryObject.h"
+#include "nsUnicodeProperties.h"
+
+#if defined(_MSC_VER) || defined(__MINGW32__)
+#include <malloc.h>
+#ifdef _MSC_VER
+#define alloca _alloca
+#endif
+#endif
+#ifdef SOLARIS
+#include <alloca.h>
+#endif
+
+using std::max;
+using std::min;
+using namespace mozilla;
+using namespace mozilla::dom;
+
+namespace mozilla {
+
+enum UnsetAction
+{
+ eUnsetInitial,
+ eUnsetInherit
+};
+
+} // namespace mozilla
+
+void*
+nsConditionalResetStyleData::GetConditionalStyleData(nsStyleStructID aSID,
+ nsStyleContext* aStyleContext) const
+{
+ Entry* e = static_cast<Entry*>(mEntries[aSID]);
+ MOZ_ASSERT(e, "if mConditionalBits bit is set, we must have at least one "
+ "conditional style struct");
+ do {
+ if (e->mConditions.Matches(aStyleContext)) {
+ void* data = e->mStyleStruct;
+
+ // For reset structs with conditions, we cache the data on the
+ // style context.
+ // Tell the style context that it doesn't own the data
+ aStyleContext->AddStyleBit(GetBitForSID(aSID));
+ aStyleContext->SetStyle(aSID, data);
+
+ return data;
+ }
+ e = e->mNext;
+ } while (e);
+ return nullptr;
+}
+
+// Creates and returns an imgRequestProxy based on the specified
+// value in aValue.
+static imgRequestProxy*
+GetImageRequest(nsPresContext* aPresContext, const nsCSSValue& aValue)
+{
+ return aValue.GetImageValue(aPresContext->Document());
+}
+
+// Creates an imgRequestProxy based on the specified value in
+// aValue and calls aCallback with it. If the nsPresContext
+// is static (e.g. for printing), then a static request (i.e.
+// showing the first frame, without animation) will be created.
+// (The expectation is then that aCallback will set the resulting
+// imgRequestProxy in a style struct somewhere.)
+static void
+SetImageRequest(function<void(imgRequestProxy*)> aCallback,
+ nsPresContext* aPresContext,
+ const nsCSSValue& aValue)
+{
+ RefPtr<imgRequestProxy> req =
+ aValue.GetPossiblyStaticImageValue(aPresContext->Document(),
+ aPresContext);
+ aCallback(req);
+}
+
+static void
+SetStyleImageRequest(function<void(nsStyleImageRequest*)> aCallback,
+ nsPresContext* aPresContext,
+ const nsCSSValue& aValue,
+ nsStyleImageRequest::Mode aModeFlags =
+ nsStyleImageRequest::Mode::Track)
+{
+ SetImageRequest([&](imgRequestProxy* aProxy) {
+ RefPtr<nsStyleImageRequest> request;
+ if (aProxy) {
+ css::ImageValue* imageValue = aValue.GetImageStructValue();
+ ImageTracker* imageTracker =
+ (aModeFlags & nsStyleImageRequest::Mode::Track)
+ ? aPresContext->Document()->ImageTracker()
+ : nullptr;
+ request =
+ new nsStyleImageRequest(aModeFlags, aProxy, imageValue, imageTracker);
+ }
+ aCallback(request);
+ }, aPresContext, aValue);
+}
+
+template<typename ReferenceBox>
+static void
+SetStyleShapeSourceToCSSValue(StyleShapeSource<ReferenceBox>* aShapeSource,
+ const nsCSSValue* aValue,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions);
+
+/* Helper function to convert a CSS <position> specified value into its
+ * computed-style form. */
+static void
+ComputePositionValue(nsStyleContext* aStyleContext,
+ const nsCSSValue& aValue,
+ Position& aComputedValue,
+ RuleNodeCacheConditions& aConditions);
+
+/*
+ * For storage of an |nsRuleNode|'s children in a PLDHashTable.
+ */
+
+struct ChildrenHashEntry : public PLDHashEntryHdr {
+ // key is |mRuleNode->GetKey()|
+ nsRuleNode *mRuleNode;
+};
+
+/* static */ PLDHashNumber
+nsRuleNode::ChildrenHashHashKey(const void *aKey)
+{
+ const nsRuleNode::Key *key =
+ static_cast<const nsRuleNode::Key*>(aKey);
+ // Disagreement on importance and level for the same rule is extremely
+ // rare, so hash just on the rule.
+ return PLDHashTable::HashVoidPtrKeyStub(key->mRule);
+}
+
+/* static */ bool
+nsRuleNode::ChildrenHashMatchEntry(const PLDHashEntryHdr *aHdr,
+ const void *aKey)
+{
+ const ChildrenHashEntry *entry =
+ static_cast<const ChildrenHashEntry*>(aHdr);
+ const nsRuleNode::Key *key =
+ static_cast<const nsRuleNode::Key*>(aKey);
+ return entry->mRuleNode->GetKey() == *key;
+}
+
+/* static */ const PLDHashTableOps
+nsRuleNode::ChildrenHashOps = {
+ // It's probably better to allocate the table itself using malloc and
+ // free rather than the pres shell's arena because the table doesn't
+ // grow very often and the pres shell's arena doesn't recycle very
+ // large size allocations.
+ ChildrenHashHashKey,
+ ChildrenHashMatchEntry,
+ PLDHashTable::MoveEntryStub,
+ PLDHashTable::ClearEntryStub,
+ nullptr
+};
+
+
+// EnsureBlockDisplay:
+// Never change display:none or display:contents *ever*, otherwise:
+// - if the display value (argument) is not a block-type
+// then we set it to a valid block display value
+// - For enforcing the floated/positioned element CSS2 rules
+// - We allow the behavior of "list-item" to be customized.
+// CSS21 says that position/float do not convert 'list-item' to 'block',
+// but it explicitly does not define whether 'list-item' should be
+// converted to block *on the root node*. To allow for flexibility
+// (so that we don't have to support a list-item root node), this method
+// lets the caller pick either behavior, using the 'aConvertListItem' arg.
+// Reference: http://www.w3.org/TR/CSS21/visuren.html#dis-pos-flo
+/* static */
+void
+nsRuleNode::EnsureBlockDisplay(StyleDisplay& display,
+ bool aConvertListItem /* = false */)
+{
+ // see if the display value is already a block
+ switch (display) {
+ case StyleDisplay::ListItem:
+ if (aConvertListItem) {
+ display = StyleDisplay::Block;
+ break;
+ } // else, fall through to share the 'break' for non-changing display vals
+ MOZ_FALLTHROUGH;
+ case StyleDisplay::None:
+ case StyleDisplay::Contents:
+ // never change display:none or display:contents *ever*
+ case StyleDisplay::Table:
+ case StyleDisplay::Block:
+ case StyleDisplay::Flex:
+ case StyleDisplay::WebkitBox:
+ case StyleDisplay::Grid:
+ // do not muck with these at all - already blocks
+ // This is equivalent to nsStyleDisplay::IsBlockOutside. (XXX Maybe we
+ // should just call that?)
+ // This needs to match the check done in
+ // nsCSSFrameConstructor::FindMathMLData for <math>.
+ break;
+
+ case StyleDisplay::InlineTable:
+ // make inline tables into tables
+ display = StyleDisplay::Table;
+ break;
+
+ case StyleDisplay::InlineFlex:
+ // make inline flex containers into flex containers
+ display = StyleDisplay::Flex;
+ break;
+
+ case StyleDisplay::WebkitInlineBox:
+ // make -webkit-inline-box containers into -webkit-box containers
+ display = StyleDisplay::WebkitBox;
+ break;
+
+ case StyleDisplay::InlineGrid:
+ // make inline grid containers into grid containers
+ display = StyleDisplay::Grid;
+ break;
+
+ default:
+ // make it a block
+ display = StyleDisplay::Block;
+ }
+}
+
+// EnsureInlineDisplay:
+// - if the display value (argument) is not an inline type
+// then we set it to a valid inline display value
+/* static */
+void
+nsRuleNode::EnsureInlineDisplay(StyleDisplay& display)
+{
+ // see if the display value is already inline
+ switch (display) {
+ case StyleDisplay::Block:
+ display = StyleDisplay::InlineBlock;
+ break;
+ case StyleDisplay::Table:
+ display = StyleDisplay::InlineTable;
+ break;
+ case StyleDisplay::Flex:
+ display = StyleDisplay::InlineFlex;
+ break;
+ case StyleDisplay::WebkitBox:
+ display = StyleDisplay::WebkitInlineBox;
+ break;
+ case StyleDisplay::Grid:
+ display = StyleDisplay::InlineGrid;
+ break;
+ case StyleDisplay::Box:
+ display = StyleDisplay::InlineBox;
+ break;
+ case StyleDisplay::Stack:
+ display = StyleDisplay::InlineStack;
+ break;
+ default:
+ break; // Do nothing
+ }
+}
+
+static nscoord CalcLengthWith(const nsCSSValue& aValue,
+ nscoord aFontSize,
+ const nsStyleFont* aStyleFont,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ bool aUseProvidedRootEmSize,
+ bool aUseUserFontSet,
+ RuleNodeCacheConditions& aConditions);
+
+struct CalcLengthCalcOps : public css::BasicCoordCalcOps,
+ public css::NumbersAlreadyNormalizedOps
+{
+ // All of the parameters to CalcLengthWith except aValue.
+ const nscoord mFontSize;
+ const nsStyleFont* const mStyleFont;
+ nsStyleContext* const mStyleContext;
+ nsPresContext* const mPresContext;
+ const bool mUseProvidedRootEmSize;
+ const bool mUseUserFontSet;
+ RuleNodeCacheConditions& mConditions;
+
+ CalcLengthCalcOps(nscoord aFontSize, const nsStyleFont* aStyleFont,
+ nsStyleContext* aStyleContext, nsPresContext* aPresContext,
+ bool aUseProvidedRootEmSize, bool aUseUserFontSet,
+ RuleNodeCacheConditions& aConditions)
+ : mFontSize(aFontSize),
+ mStyleFont(aStyleFont),
+ mStyleContext(aStyleContext),
+ mPresContext(aPresContext),
+ mUseProvidedRootEmSize(aUseProvidedRootEmSize),
+ mUseUserFontSet(aUseUserFontSet),
+ mConditions(aConditions)
+ {
+ }
+
+ result_type ComputeLeafValue(const nsCSSValue& aValue)
+ {
+ return CalcLengthWith(aValue, mFontSize, mStyleFont,
+ mStyleContext, mPresContext, mUseProvidedRootEmSize,
+ mUseUserFontSet, mConditions);
+ }
+};
+
+static inline nscoord ScaleCoordRound(const nsCSSValue& aValue, float aFactor)
+{
+ return NSToCoordRoundWithClamp(aValue.GetFloatValue() * aFactor);
+}
+
+static inline nscoord ScaleViewportCoordTrunc(const nsCSSValue& aValue,
+ nscoord aViewportSize)
+{
+ // For units (like percentages and viewport units) where authors might
+ // repeatedly use a value and expect some multiple of the value to be
+ // smaller than a container, we need to use floor rather than round.
+ // We need to use division by 100.0 rather than multiplication by 0.1f
+ // to avoid introducing error.
+ return NSToCoordTruncClamped(aValue.GetFloatValue() *
+ aViewportSize / 100.0f);
+}
+
+already_AddRefed<nsFontMetrics>
+GetMetricsFor(nsPresContext* aPresContext,
+ nsStyleContext* aStyleContext,
+ const nsStyleFont* aStyleFont,
+ nscoord aFontSize, // overrides value from aStyleFont
+ bool aUseUserFontSet)
+{
+ nsFont font = aStyleFont->mFont;
+ font.size = aFontSize;
+ gfxFont::Orientation orientation = gfxFont::eHorizontal;
+ if (aStyleContext) {
+ WritingMode wm(aStyleContext);
+ if (wm.IsVertical() && !wm.IsSideways()) {
+ orientation = gfxFont::eVertical;
+ }
+ }
+ nsFontMetrics::Params params;
+ params.language = aStyleFont->mLanguage;
+ params.explicitLanguage = aStyleFont->mExplicitLanguage;
+ params.orientation = orientation;
+ params.userFontSet =
+ aUseUserFontSet ? aPresContext->GetUserFontSet() : nullptr;
+ params.textPerf = aPresContext->GetTextPerfMetrics();
+ return aPresContext->DeviceContext()->GetMetricsFor(font, params);
+}
+
+
+static nsSize CalcViewportUnitsScale(nsPresContext* aPresContext)
+{
+ // The caller is making use of viewport units, so notify the pres context
+ // that it will need to rebuild the rule tree if the size of the viewport
+ // changes.
+ aPresContext->SetUsesViewportUnits(true);
+
+ // The default (when we have 'overflow: auto' on the root element, or
+ // trivially for 'overflow: hidden' since we never have scrollbars in that
+ // case) is to define the scale of the viewport units without considering
+ // scrollbars.
+ nsSize viewportSize(aPresContext->GetVisibleArea().Size());
+
+ // Check for 'overflow: scroll' styles on the root scroll frame. If we find
+ // any, the standard requires us to take scrollbars into account.
+ nsIScrollableFrame* scrollFrame =
+ aPresContext->PresShell()->GetRootScrollFrameAsScrollable();
+ if (scrollFrame) {
+ ScrollbarStyles styles(scrollFrame->GetScrollbarStyles());
+
+ if (styles.mHorizontal == NS_STYLE_OVERFLOW_SCROLL ||
+ styles.mVertical == NS_STYLE_OVERFLOW_SCROLL) {
+ // Gather scrollbar size information.
+ nsRenderingContext context(
+ aPresContext->PresShell()->CreateReferenceRenderingContext());
+ nsMargin sizes(scrollFrame->GetDesiredScrollbarSizes(aPresContext, &context));
+
+ if (styles.mHorizontal == NS_STYLE_OVERFLOW_SCROLL) {
+ // 'overflow-x: scroll' means we must consider the horizontal scrollbar,
+ // which affects the scale of viewport height units.
+ viewportSize.height -= sizes.TopBottom();
+ }
+
+ if (styles.mVertical == NS_STYLE_OVERFLOW_SCROLL) {
+ // 'overflow-y: scroll' means we must consider the vertical scrollbar,
+ // which affects the scale of viewport width units.
+ viewportSize.width -= sizes.LeftRight();
+ }
+ }
+ }
+
+ return viewportSize;
+}
+
+// If |aStyleFont| is nullptr, aStyleContext->StyleFont() is used.
+//
+// In case that |aValue| is rem unit, if |aStyleContext| is null, callers must
+// specify a valid |aStyleFont| and |aUseProvidedRootEmSize| must be true so
+// that we can get the length from |aStyleFont|.
+static nscoord CalcLengthWith(const nsCSSValue& aValue,
+ nscoord aFontSize,
+ const nsStyleFont* aStyleFont,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ bool aUseProvidedRootEmSize,
+ // aUseUserFontSet should always be true
+ // except when called from
+ // CalcLengthWithInitialFont.
+ bool aUseUserFontSet,
+ RuleNodeCacheConditions& aConditions)
+{
+ NS_ASSERTION(aValue.IsLengthUnit() || aValue.IsCalcUnit(),
+ "not a length or calc unit");
+ NS_ASSERTION(aStyleFont || aStyleContext,
+ "Must have style data");
+ NS_ASSERTION(aStyleContext || aUseProvidedRootEmSize,
+ "Must have style context or specify aUseProvidedRootEmSize");
+ NS_ASSERTION(aPresContext, "Must have prescontext");
+
+ if (aValue.IsFixedLengthUnit()) {
+ return aValue.GetFixedLength(aPresContext);
+ }
+ if (aValue.IsPixelLengthUnit()) {
+ return aValue.GetPixelLength();
+ }
+ if (aValue.IsCalcUnit()) {
+ // For properties for which lengths are the *only* units accepted in
+ // calc(), we can handle calc() here and just compute a final
+ // result. We ensure that we don't get to this code for other
+ // properties by not calling CalcLength in those cases: SetCoord
+ // only calls CalcLength for a calc when it is appropriate to do so.
+ CalcLengthCalcOps ops(aFontSize, aStyleFont,
+ aStyleContext, aPresContext,
+ aUseProvidedRootEmSize, aUseUserFontSet,
+ aConditions);
+ return css::ComputeCalc(aValue, ops);
+ }
+ switch (aValue.GetUnit()) {
+ // nsPresContext::SetVisibleArea and
+ // nsPresContext::MediaFeatureValuesChanged handle dynamic changes
+ // of the basis for viewport units by rebuilding the rule tree and
+ // style context tree. Not caching them in the rule tree wouldn't
+ // be sufficient to handle these changes because we also need a way
+ // to get rid of cached values in the style context tree without any
+ // changes in specified style. We can either do this by not caching
+ // in the rule tree and then throwing away the style context tree
+ // for dynamic viewport size changes, or by allowing caching in the
+ // rule tree and using the existing rebuild style data path that
+ // throws away the style context and the rule tree.
+ // Thus we do cache viewport units in the rule tree. This allows us
+ // to benefit from the performance advantages of the rule tree
+ // (e.g., faster dynamic changes on other things, like transforms)
+ // and allows us not to need an additional code path, in exchange
+ // for an increased cost to dynamic changes to the viewport size
+ // when viewport units are in use.
+ case eCSSUnit_ViewportWidth: {
+ nscoord viewportWidth = CalcViewportUnitsScale(aPresContext).width;
+ return ScaleViewportCoordTrunc(aValue, viewportWidth);
+ }
+ case eCSSUnit_ViewportHeight: {
+ nscoord viewportHeight = CalcViewportUnitsScale(aPresContext).height;
+ return ScaleViewportCoordTrunc(aValue, viewportHeight);
+ }
+ case eCSSUnit_ViewportMin: {
+ nsSize vuScale(CalcViewportUnitsScale(aPresContext));
+ nscoord viewportMin = min(vuScale.width, vuScale.height);
+ return ScaleViewportCoordTrunc(aValue, viewportMin);
+ }
+ case eCSSUnit_ViewportMax: {
+ nsSize vuScale(CalcViewportUnitsScale(aPresContext));
+ nscoord viewportMax = max(vuScale.width, vuScale.height);
+ return ScaleViewportCoordTrunc(aValue, viewportMax);
+ }
+ // While we could deal with 'rem' units correctly by simply not
+ // caching any data that uses them in the rule tree, it's valuable
+ // to store them in the rule tree (for faster dynamic changes of
+ // other things). And since the font size of the root element
+ // changes rarely, we instead handle dynamic changes to the root
+ // element's font size by rebuilding all style data in
+ // nsCSSFrameConstructor::RestyleElement.
+ case eCSSUnit_RootEM: {
+ aPresContext->SetUsesRootEMUnits(true);
+ nscoord rootFontSize;
+
+ // NOTE: Be very careful with |styleFont|, since we haven't added any
+ // conditions to aConditions or set it to uncacheable yet, so we don't
+ // want to introduce any dependencies on aStyleContext's data here.
+ const nsStyleFont *styleFont =
+ aStyleFont ? aStyleFont : aStyleContext->StyleFont();
+
+ if (aUseProvidedRootEmSize) {
+ // We should use the provided aFontSize as the reference length to
+ // scale. This only happens when we are calculating font-size or
+ // an equivalent (scriptminsize or CalcLengthWithInitialFont) on
+ // the root element, in which case aFontSize is already the
+ // value we want.
+ if (aFontSize == -1) {
+ // XXX Should this be styleFont->mSize instead to avoid taking
+ // minfontsize prefs into account?
+ aFontSize = styleFont->mFont.size;
+ }
+ rootFontSize = aFontSize;
+ } else if (aStyleContext && !aStyleContext->GetParent()) {
+ // This is the root element (XXX we don't really know this, but
+ // nsRuleNode::SetFont makes the same assumption!), so we should
+ // use StyleFont on this context to get the root element's
+ // font size.
+ rootFontSize = styleFont->mFont.size;
+ } else {
+ // This is not the root element or we are calculating something other
+ // than font size, so rem is relative to the root element's font size.
+ // Find the root style context by walking up the style context tree.
+ nsStyleContext* rootStyle = aStyleContext;
+ while (rootStyle->GetParent()) {
+ rootStyle = rootStyle->GetParent();
+ }
+
+ const nsStyleFont *rootStyleFont = rootStyle->StyleFont();
+ rootFontSize = rootStyleFont->mFont.size;
+ }
+
+ return ScaleCoordRound(aValue, float(rootFontSize));
+ }
+ default:
+ // Fall through to the code for units that can't be stored in the
+ // rule tree because they depend on font data.
+ break;
+ }
+ // Common code for units that depend on the element's font data and
+ // thus can't be stored in the rule tree:
+ const nsStyleFont *styleFont =
+ aStyleFont ? aStyleFont : aStyleContext->StyleFont();
+ if (aFontSize == -1) {
+ // XXX Should this be styleFont->mSize instead to avoid taking minfontsize
+ // prefs into account?
+ aFontSize = styleFont->mFont.size;
+ }
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_EM: {
+ if (aValue.GetFloatValue() == 0.0f) {
+ // Don't call SetFontSizeDependency for '0em'.
+ return 0;
+ }
+ // CSS2.1 specifies that this unit scales to the computed font
+ // size, not the em-width in the font metrics, despite the name.
+ aConditions.SetFontSizeDependency(aFontSize);
+ return ScaleCoordRound(aValue, float(aFontSize));
+ }
+ case eCSSUnit_XHeight: {
+ aPresContext->SetUsesExChUnits(true);
+ RefPtr<nsFontMetrics> fm =
+ GetMetricsFor(aPresContext, aStyleContext, styleFont,
+ aFontSize, aUseUserFontSet);
+ aConditions.SetUncacheable();
+ return ScaleCoordRound(aValue, float(fm->XHeight()));
+ }
+ case eCSSUnit_Char: {
+ aPresContext->SetUsesExChUnits(true);
+ RefPtr<nsFontMetrics> fm =
+ GetMetricsFor(aPresContext, aStyleContext, styleFont,
+ aFontSize, aUseUserFontSet);
+ gfxFloat zeroWidth =
+ fm->GetThebesFontGroup()->GetFirstValidFont()->
+ GetMetrics(fm->Orientation()).zeroOrAveCharWidth;
+
+ aConditions.SetUncacheable();
+ return ScaleCoordRound(aValue, ceil(aPresContext->AppUnitsPerDevPixel() *
+ zeroWidth));
+ }
+ default:
+ NS_NOTREACHED("unexpected unit");
+ break;
+ }
+ return 0;
+}
+
+/* static */ nscoord
+nsRuleNode::CalcLength(const nsCSSValue& aValue,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+{
+ NS_ASSERTION(aStyleContext, "Must have style data");
+
+ return CalcLengthWith(aValue, -1, nullptr,
+ aStyleContext, aPresContext,
+ false, true, aConditions);
+}
+
+/* Inline helper function to redirect requests to CalcLength. */
+static inline nscoord CalcLength(const nsCSSValue& aValue,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+{
+ return nsRuleNode::CalcLength(aValue, aStyleContext,
+ aPresContext, aConditions);
+}
+
+/* static */ nscoord
+nsRuleNode::CalcLengthWithInitialFont(nsPresContext* aPresContext,
+ const nsCSSValue& aValue)
+{
+ nsStyleFont defaultFont(aPresContext); // FIXME: best language?
+ RuleNodeCacheConditions conditions;
+ return CalcLengthWith(aValue, -1, &defaultFont,
+ nullptr, aPresContext,
+ true, false, conditions);
+}
+
+struct LengthPercentPairCalcOps : public css::NumbersAlreadyNormalizedOps
+{
+ typedef nsRuleNode::ComputedCalc result_type;
+
+ LengthPercentPairCalcOps(nsStyleContext* aContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+ : mContext(aContext),
+ mPresContext(aPresContext),
+ mConditions(aConditions),
+ mHasPercent(false) {}
+
+ nsStyleContext* mContext;
+ nsPresContext* mPresContext;
+ RuleNodeCacheConditions& mConditions;
+ bool mHasPercent;
+
+ result_type ComputeLeafValue(const nsCSSValue& aValue)
+ {
+ if (aValue.GetUnit() == eCSSUnit_Percent) {
+ mHasPercent = true;
+ return result_type(0, aValue.GetPercentValue());
+ }
+ return result_type(CalcLength(aValue, mContext, mPresContext,
+ mConditions),
+ 0.0f);
+ }
+
+ result_type
+ MergeAdditive(nsCSSUnit aCalcFunction,
+ result_type aValue1, result_type aValue2)
+ {
+ if (aCalcFunction == eCSSUnit_Calc_Plus) {
+ return result_type(NSCoordSaturatingAdd(aValue1.mLength,
+ aValue2.mLength),
+ aValue1.mPercent + aValue2.mPercent);
+ }
+ MOZ_ASSERT(aCalcFunction == eCSSUnit_Calc_Minus,
+ "min() and max() are not allowed in calc() on transform");
+ return result_type(NSCoordSaturatingSubtract(aValue1.mLength,
+ aValue2.mLength, 0),
+ aValue1.mPercent - aValue2.mPercent);
+ }
+
+ result_type
+ MergeMultiplicativeL(nsCSSUnit aCalcFunction,
+ float aValue1, result_type aValue2)
+ {
+ MOZ_ASSERT(aCalcFunction == eCSSUnit_Calc_Times_L,
+ "unexpected unit");
+ return result_type(NSCoordSaturatingMultiply(aValue2.mLength, aValue1),
+ aValue1 * aValue2.mPercent);
+ }
+
+ result_type
+ MergeMultiplicativeR(nsCSSUnit aCalcFunction,
+ result_type aValue1, float aValue2)
+ {
+ MOZ_ASSERT(aCalcFunction == eCSSUnit_Calc_Times_R ||
+ aCalcFunction == eCSSUnit_Calc_Divided,
+ "unexpected unit");
+ if (aCalcFunction == eCSSUnit_Calc_Divided) {
+ aValue2 = 1.0f / aValue2;
+ }
+ return result_type(NSCoordSaturatingMultiply(aValue1.mLength, aValue2),
+ aValue1.mPercent * aValue2);
+ }
+
+};
+
+static void
+SpecifiedCalcToComputedCalc(const nsCSSValue& aValue, nsStyleCoord& aCoord,
+ nsStyleContext* aStyleContext,
+ RuleNodeCacheConditions& aConditions)
+{
+ LengthPercentPairCalcOps ops(aStyleContext, aStyleContext->PresContext(),
+ aConditions);
+ nsRuleNode::ComputedCalc vals = ComputeCalc(aValue, ops);
+
+ nsStyleCoord::Calc* calcObj = new nsStyleCoord::Calc;
+
+ calcObj->mLength = vals.mLength;
+ calcObj->mPercent = vals.mPercent;
+ calcObj->mHasPercent = ops.mHasPercent;
+
+ aCoord.SetCalcValue(calcObj);
+}
+
+/* static */ nsRuleNode::ComputedCalc
+nsRuleNode::SpecifiedCalcToComputedCalc(const nsCSSValue& aValue,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+{
+ LengthPercentPairCalcOps ops(aStyleContext, aPresContext,
+ aConditions);
+ return ComputeCalc(aValue, ops);
+}
+
+// This is our public API for handling calc() expressions that involve
+// percentages.
+/* static */ nscoord
+nsRuleNode::ComputeComputedCalc(const nsStyleCoord& aValue,
+ nscoord aPercentageBasis)
+{
+ nsStyleCoord::Calc* calc = aValue.GetCalcValue();
+ return calc->mLength +
+ NSToCoordFloorClamped(aPercentageBasis * calc->mPercent);
+}
+
+/* static */ nscoord
+nsRuleNode::ComputeCoordPercentCalc(const nsStyleCoord& aCoord,
+ nscoord aPercentageBasis)
+{
+ switch (aCoord.GetUnit()) {
+ case eStyleUnit_Coord:
+ return aCoord.GetCoordValue();
+ case eStyleUnit_Percent:
+ return NSToCoordFloorClamped(aPercentageBasis * aCoord.GetPercentValue());
+ case eStyleUnit_Calc:
+ return ComputeComputedCalc(aCoord, aPercentageBasis);
+ default:
+ MOZ_ASSERT(false, "unexpected unit");
+ return 0;
+ }
+}
+
+/* Given an enumerated value that represents a box position, converts it to
+ * a float representing the percentage of the box it corresponds to. For
+ * example, "center" becomes 0.5f.
+ *
+ * @param aEnumValue The enumerated value.
+ * @return The float percent it corresponds to.
+ */
+static float
+GetFloatFromBoxPosition(int32_t aEnumValue)
+{
+ switch (aEnumValue) {
+ case NS_STYLE_IMAGELAYER_POSITION_LEFT:
+ case NS_STYLE_IMAGELAYER_POSITION_TOP:
+ return 0.0f;
+ case NS_STYLE_IMAGELAYER_POSITION_RIGHT:
+ case NS_STYLE_IMAGELAYER_POSITION_BOTTOM:
+ return 1.0f;
+ default:
+ MOZ_FALLTHROUGH_ASSERT("unexpected box position value");
+ case NS_STYLE_IMAGELAYER_POSITION_CENTER:
+ return 0.5f;
+ }
+}
+
+#define SETCOORD_NORMAL 0x01 // N
+#define SETCOORD_AUTO 0x02 // A
+#define SETCOORD_INHERIT 0x04 // H
+#define SETCOORD_PERCENT 0x08 // P
+#define SETCOORD_FACTOR 0x10 // F
+#define SETCOORD_LENGTH 0x20 // L
+#define SETCOORD_INTEGER 0x40 // I
+#define SETCOORD_ENUMERATED 0x80 // E
+#define SETCOORD_NONE 0x100 // O
+#define SETCOORD_INITIAL_ZERO 0x200
+#define SETCOORD_INITIAL_AUTO 0x400
+#define SETCOORD_INITIAL_NONE 0x800
+#define SETCOORD_INITIAL_NORMAL 0x1000
+#define SETCOORD_INITIAL_HALF 0x2000
+#define SETCOORD_INITIAL_HUNDRED_PCT 0x00004000
+#define SETCOORD_INITIAL_FACTOR_ONE 0x00008000
+#define SETCOORD_INITIAL_FACTOR_ZERO 0x00010000
+#define SETCOORD_CALC_LENGTH_ONLY 0x00020000
+#define SETCOORD_CALC_CLAMP_NONNEGATIVE 0x00040000 // modifier for CALC_LENGTH_ONLY
+#define SETCOORD_STORE_CALC 0x00080000
+#define SETCOORD_BOX_POSITION 0x00100000 // exclusive with _ENUMERATED
+#define SETCOORD_ANGLE 0x00200000
+#define SETCOORD_UNSET_INHERIT 0x00400000
+#define SETCOORD_UNSET_INITIAL 0x00800000
+
+#define SETCOORD_LP (SETCOORD_LENGTH | SETCOORD_PERCENT)
+#define SETCOORD_LH (SETCOORD_LENGTH | SETCOORD_INHERIT)
+#define SETCOORD_AH (SETCOORD_AUTO | SETCOORD_INHERIT)
+#define SETCOORD_LAH (SETCOORD_AUTO | SETCOORD_LENGTH | SETCOORD_INHERIT)
+#define SETCOORD_LPH (SETCOORD_LP | SETCOORD_INHERIT)
+#define SETCOORD_LPAH (SETCOORD_LP | SETCOORD_AH)
+#define SETCOORD_LPE (SETCOORD_LP | SETCOORD_ENUMERATED)
+#define SETCOORD_LPEH (SETCOORD_LPE | SETCOORD_INHERIT)
+#define SETCOORD_LPAEH (SETCOORD_LPAH | SETCOORD_ENUMERATED)
+#define SETCOORD_LPO (SETCOORD_LP | SETCOORD_NONE)
+#define SETCOORD_LPOH (SETCOORD_LPH | SETCOORD_NONE)
+#define SETCOORD_LPOEH (SETCOORD_LPOH | SETCOORD_ENUMERATED)
+#define SETCOORD_LE (SETCOORD_LENGTH | SETCOORD_ENUMERATED)
+#define SETCOORD_LEH (SETCOORD_LE | SETCOORD_INHERIT)
+#define SETCOORD_IA (SETCOORD_INTEGER | SETCOORD_AUTO)
+#define SETCOORD_LAE (SETCOORD_LENGTH | SETCOORD_AUTO | SETCOORD_ENUMERATED)
+
+// changes aCoord iff it returns true
+static bool SetCoord(const nsCSSValue& aValue, nsStyleCoord& aCoord,
+ const nsStyleCoord& aParentCoord,
+ int32_t aMask, nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+{
+ bool result = true;
+ if (aValue.GetUnit() == eCSSUnit_Null) {
+ result = false;
+ }
+ else if ((((aMask & SETCOORD_LENGTH) != 0) &&
+ aValue.IsLengthUnit()) ||
+ (((aMask & SETCOORD_CALC_LENGTH_ONLY) != 0) &&
+ aValue.IsCalcUnit())) {
+ nscoord len = CalcLength(aValue, aStyleContext, aPresContext,
+ aConditions);
+ if ((aMask & SETCOORD_CALC_CLAMP_NONNEGATIVE) && len < 0) {
+ NS_ASSERTION(aValue.IsCalcUnit(),
+ "parser should have ensured no nonnegative lengths");
+ len = 0;
+ }
+ aCoord.SetCoordValue(len);
+ }
+ else if (((aMask & SETCOORD_PERCENT) != 0) &&
+ (aValue.GetUnit() == eCSSUnit_Percent)) {
+ aCoord.SetPercentValue(aValue.GetPercentValue());
+ }
+ else if (((aMask & SETCOORD_INTEGER) != 0) &&
+ (aValue.GetUnit() == eCSSUnit_Integer)) {
+ aCoord.SetIntValue(aValue.GetIntValue(), eStyleUnit_Integer);
+ }
+ else if (((aMask & SETCOORD_ENUMERATED) != 0) &&
+ (aValue.GetUnit() == eCSSUnit_Enumerated)) {
+ aCoord.SetIntValue(aValue.GetIntValue(), eStyleUnit_Enumerated);
+ }
+ else if (((aMask & SETCOORD_BOX_POSITION) != 0) &&
+ (aValue.GetUnit() == eCSSUnit_Enumerated)) {
+ aCoord.SetPercentValue(GetFloatFromBoxPosition(aValue.GetIntValue()));
+ }
+ else if (((aMask & SETCOORD_AUTO) != 0) &&
+ (aValue.GetUnit() == eCSSUnit_Auto)) {
+ aCoord.SetAutoValue();
+ }
+ else if ((((aMask & SETCOORD_INHERIT) != 0) &&
+ aValue.GetUnit() == eCSSUnit_Inherit) ||
+ (((aMask & SETCOORD_UNSET_INHERIT) != 0) &&
+ aValue.GetUnit() == eCSSUnit_Unset)) {
+ aCoord = aParentCoord; // just inherit value from parent
+ aConditions.SetUncacheable();
+ }
+ else if (((aMask & SETCOORD_NORMAL) != 0) &&
+ (aValue.GetUnit() == eCSSUnit_Normal)) {
+ aCoord.SetNormalValue();
+ }
+ else if (((aMask & SETCOORD_NONE) != 0) &&
+ (aValue.GetUnit() == eCSSUnit_None)) {
+ aCoord.SetNoneValue();
+ }
+ else if (((aMask & SETCOORD_FACTOR) != 0) &&
+ (aValue.GetUnit() == eCSSUnit_Number)) {
+ aCoord.SetFactorValue(aValue.GetFloatValue());
+ }
+ else if (((aMask & SETCOORD_STORE_CALC) != 0) &&
+ (aValue.IsCalcUnit())) {
+ SpecifiedCalcToComputedCalc(aValue, aCoord, aStyleContext,
+ aConditions);
+ }
+ else if (aValue.GetUnit() == eCSSUnit_Initial ||
+ (aValue.GetUnit() == eCSSUnit_Unset &&
+ ((aMask & SETCOORD_UNSET_INITIAL) != 0))) {
+ if ((aMask & SETCOORD_INITIAL_AUTO) != 0) {
+ aCoord.SetAutoValue();
+ }
+ else if ((aMask & SETCOORD_INITIAL_ZERO) != 0) {
+ aCoord.SetCoordValue(0);
+ }
+ else if ((aMask & SETCOORD_INITIAL_FACTOR_ZERO) != 0) {
+ aCoord.SetFactorValue(0.0f);
+ }
+ else if ((aMask & SETCOORD_INITIAL_NONE) != 0) {
+ aCoord.SetNoneValue();
+ }
+ else if ((aMask & SETCOORD_INITIAL_NORMAL) != 0) {
+ aCoord.SetNormalValue();
+ }
+ else if ((aMask & SETCOORD_INITIAL_HALF) != 0) {
+ aCoord.SetPercentValue(0.5f);
+ }
+ else if ((aMask & SETCOORD_INITIAL_HUNDRED_PCT) != 0) {
+ aCoord.SetPercentValue(1.0f);
+ }
+ else if ((aMask & SETCOORD_INITIAL_FACTOR_ONE) != 0) {
+ aCoord.SetFactorValue(1.0f);
+ }
+ else {
+ result = false; // didn't set anything
+ }
+ }
+ else if ((aMask & SETCOORD_ANGLE) != 0 &&
+ (aValue.IsAngularUnit())) {
+ nsStyleUnit unit;
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Degree: unit = eStyleUnit_Degree; break;
+ case eCSSUnit_Grad: unit = eStyleUnit_Grad; break;
+ case eCSSUnit_Radian: unit = eStyleUnit_Radian; break;
+ case eCSSUnit_Turn: unit = eStyleUnit_Turn; break;
+ default: NS_NOTREACHED("unrecognized angular unit");
+ unit = eStyleUnit_Degree;
+ }
+ aCoord.SetAngleValue(aValue.GetAngleValue(), unit);
+ }
+ else {
+ result = false; // didn't set anything
+ }
+ return result;
+}
+
+// This inline function offers a shortcut for SetCoord() by refusing to accept
+// SETCOORD_LENGTH, SETCOORD_INHERIT and SETCOORD_UNSET_* masks.
+static inline bool SetAbsCoord(const nsCSSValue& aValue,
+ nsStyleCoord& aCoord,
+ int32_t aMask)
+{
+ MOZ_ASSERT((aMask & (SETCOORD_LH | SETCOORD_UNSET_INHERIT |
+ SETCOORD_UNSET_INITIAL)) == 0,
+ "does not handle SETCOORD_LENGTH, SETCOORD_INHERIT and "
+ "SETCOORD_UNSET_*");
+
+ // The values of the following variables will never be used; so it does not
+ // matter what to set.
+ const nsStyleCoord dummyParentCoord;
+ nsStyleContext* dummyStyleContext = nullptr;
+ nsPresContext* dummyPresContext = nullptr;
+ RuleNodeCacheConditions dummyCacheKey;
+
+ bool rv = SetCoord(aValue, aCoord, dummyParentCoord, aMask,
+ dummyStyleContext, dummyPresContext,
+ dummyCacheKey);
+ MOZ_ASSERT(dummyCacheKey.CacheableWithoutDependencies(),
+ "SetCoord() should not modify dummyCacheKey.");
+
+ return rv;
+}
+
+/* Given a specified value that might be a pair value, call SetCoord twice,
+ * either using each member of the pair, or using the unpaired value twice.
+ */
+static bool
+SetPairCoords(const nsCSSValue& aValue,
+ nsStyleCoord& aCoordX, nsStyleCoord& aCoordY,
+ const nsStyleCoord& aParentX, const nsStyleCoord& aParentY,
+ int32_t aMask, nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext, RuleNodeCacheConditions& aConditions)
+{
+ const nsCSSValue& valX =
+ aValue.GetUnit() == eCSSUnit_Pair ? aValue.GetPairValue().mXValue : aValue;
+ const nsCSSValue& valY =
+ aValue.GetUnit() == eCSSUnit_Pair ? aValue.GetPairValue().mYValue : aValue;
+
+ bool cX = SetCoord(valX, aCoordX, aParentX, aMask, aStyleContext,
+ aPresContext, aConditions);
+ mozilla::DebugOnly<bool> cY = SetCoord(valY, aCoordY, aParentY, aMask,
+ aStyleContext, aPresContext, aConditions);
+ MOZ_ASSERT(cX == cY, "changed one but not the other");
+ return cX;
+}
+
+static bool SetColor(const nsCSSValue& aValue, const nscolor aParentColor,
+ nsPresContext* aPresContext, nsStyleContext *aContext,
+ nscolor& aResult, RuleNodeCacheConditions& aConditions)
+{
+ bool result = false;
+ nsCSSUnit unit = aValue.GetUnit();
+
+ if (aValue.IsNumericColorUnit()) {
+ aResult = aValue.GetColorValue();
+ result = true;
+ }
+ else if (eCSSUnit_Ident == unit) {
+ nsAutoString value;
+ aValue.GetStringValue(value);
+ nscolor rgba;
+ if (NS_ColorNameToRGB(value, &rgba)) {
+ aResult = rgba;
+ result = true;
+ }
+ }
+ else if (eCSSUnit_EnumColor == unit) {
+ int32_t intValue = aValue.GetIntValue();
+ if (0 <= intValue) {
+ LookAndFeel::ColorID colorID = (LookAndFeel::ColorID) intValue;
+ bool useStandinsForNativeColors = aPresContext &&
+ !aPresContext->IsChrome();
+ if (NS_SUCCEEDED(LookAndFeel::GetColor(colorID,
+ useStandinsForNativeColors, &aResult))) {
+ result = true;
+ }
+ }
+ else {
+ aResult = NS_RGB(0, 0, 0);
+ result = false;
+ switch (intValue) {
+ case NS_COLOR_MOZ_HYPERLINKTEXT:
+ if (aPresContext) {
+ aResult = aPresContext->DefaultLinkColor();
+ result = true;
+ }
+ break;
+ case NS_COLOR_MOZ_VISITEDHYPERLINKTEXT:
+ if (aPresContext) {
+ aResult = aPresContext->DefaultVisitedLinkColor();
+ result = true;
+ }
+ break;
+ case NS_COLOR_MOZ_ACTIVEHYPERLINKTEXT:
+ if (aPresContext) {
+ aResult = aPresContext->DefaultActiveLinkColor();
+ result = true;
+ }
+ break;
+ case NS_COLOR_CURRENTCOLOR:
+ // The data computed from this can't be shared in the rule tree
+ // because they could be used on a node with a different color
+ aConditions.SetUncacheable();
+ if (aContext) {
+ aResult = aContext->StyleColor()->mColor;
+ result = true;
+ }
+ break;
+ case NS_COLOR_MOZ_DEFAULT_COLOR:
+ if (aPresContext) {
+ aResult = aPresContext->DefaultColor();
+ result = true;
+ }
+ break;
+ case NS_COLOR_MOZ_DEFAULT_BACKGROUND_COLOR:
+ if (aPresContext) {
+ aResult = aPresContext->DefaultBackgroundColor();
+ result = true;
+ }
+ break;
+ default:
+ NS_NOTREACHED("Should never have an unknown negative colorID.");
+ break;
+ }
+ }
+ }
+ else if (eCSSUnit_Inherit == unit) {
+ aResult = aParentColor;
+ result = true;
+ aConditions.SetUncacheable();
+ }
+ else if (eCSSUnit_Enumerated == unit &&
+ aValue.GetIntValue() == NS_STYLE_COLOR_INHERIT_FROM_BODY) {
+ NS_ASSERTION(aPresContext->CompatibilityMode() == eCompatibility_NavQuirks,
+ "Should only get this value in quirks mode");
+ // We just grab the color from the prescontext, and rely on the fact that
+ // if the body color ever changes all its descendants will get new style
+ // contexts (but NOT necessarily new rulenodes).
+ aResult = aPresContext->BodyTextColor();
+ result = true;
+ aConditions.SetUncacheable();
+ }
+ return result;
+}
+
+template<UnsetAction UnsetTo>
+static void
+SetComplexColor(const nsCSSValue& aValue,
+ const StyleComplexColor& aParentColor,
+ const StyleComplexColor& aInitialColor,
+ nsPresContext* aPresContext,
+ StyleComplexColor& aResult,
+ RuleNodeCacheConditions& aConditions)
+{
+ nsCSSUnit unit = aValue.GetUnit();
+ if (unit == eCSSUnit_Null) {
+ return;
+ }
+ if (unit == eCSSUnit_Initial ||
+ (UnsetTo == eUnsetInitial && unit == eCSSUnit_Unset)) {
+ aResult = aInitialColor;
+ } else if (unit == eCSSUnit_Inherit ||
+ (UnsetTo == eUnsetInherit && unit == eCSSUnit_Unset)) {
+ aConditions.SetUncacheable();
+ aResult = aParentColor;
+ } else if (unit == eCSSUnit_EnumColor &&
+ aValue.GetIntValue() == NS_COLOR_CURRENTCOLOR) {
+ aResult = StyleComplexColor::CurrentColor();
+ } else if (unit == eCSSUnit_ComplexColor) {
+ aResult = aValue.GetStyleComplexColorValue();
+ } else {
+ if (!SetColor(aValue, aParentColor.mColor, aPresContext,
+ nullptr, aResult.mColor, aConditions)) {
+ MOZ_ASSERT_UNREACHABLE("Unknown color value");
+ return;
+ }
+ aResult.mForegroundRatio = 0;
+ }
+}
+
+static void SetGradientCoord(const nsCSSValue& aValue, nsPresContext* aPresContext,
+ nsStyleContext* aContext, nsStyleCoord& aResult,
+ RuleNodeCacheConditions& aConditions)
+{
+ // OK to pass bad aParentCoord since we're not passing SETCOORD_INHERIT
+ if (!SetCoord(aValue, aResult, nsStyleCoord(),
+ SETCOORD_LPO | SETCOORD_BOX_POSITION | SETCOORD_STORE_CALC,
+ aContext, aPresContext, aConditions)) {
+ NS_NOTREACHED("unexpected unit for gradient anchor point");
+ aResult.SetNoneValue();
+ }
+}
+
+static void SetGradient(const nsCSSValue& aValue, nsPresContext* aPresContext,
+ nsStyleContext* aContext, nsStyleGradient& aResult,
+ RuleNodeCacheConditions& aConditions)
+{
+ MOZ_ASSERT(aValue.GetUnit() == eCSSUnit_Gradient,
+ "The given data is not a gradient");
+
+ const nsCSSValueGradient* gradient = aValue.GetGradientValue();
+
+ if (gradient->mIsExplicitSize) {
+ SetCoord(gradient->GetRadiusX(), aResult.mRadiusX, nsStyleCoord(),
+ SETCOORD_LP | SETCOORD_STORE_CALC,
+ aContext, aPresContext, aConditions);
+ if (gradient->GetRadiusY().GetUnit() != eCSSUnit_None) {
+ SetCoord(gradient->GetRadiusY(), aResult.mRadiusY, nsStyleCoord(),
+ SETCOORD_LP | SETCOORD_STORE_CALC,
+ aContext, aPresContext, aConditions);
+ aResult.mShape = NS_STYLE_GRADIENT_SHAPE_ELLIPTICAL;
+ } else {
+ aResult.mRadiusY = aResult.mRadiusX;
+ aResult.mShape = NS_STYLE_GRADIENT_SHAPE_CIRCULAR;
+ }
+ aResult.mSize = NS_STYLE_GRADIENT_SIZE_EXPLICIT_SIZE;
+ } else if (gradient->mIsRadial) {
+ if (gradient->GetRadialShape().GetUnit() == eCSSUnit_Enumerated) {
+ aResult.mShape = gradient->GetRadialShape().GetIntValue();
+ } else {
+ NS_ASSERTION(gradient->GetRadialShape().GetUnit() == eCSSUnit_None,
+ "bad unit for radial shape");
+ aResult.mShape = NS_STYLE_GRADIENT_SHAPE_ELLIPTICAL;
+ }
+ if (gradient->GetRadialSize().GetUnit() == eCSSUnit_Enumerated) {
+ aResult.mSize = gradient->GetRadialSize().GetIntValue();
+ } else {
+ NS_ASSERTION(gradient->GetRadialSize().GetUnit() == eCSSUnit_None,
+ "bad unit for radial shape");
+ aResult.mSize = NS_STYLE_GRADIENT_SIZE_FARTHEST_CORNER;
+ }
+ } else {
+ NS_ASSERTION(gradient->GetRadialShape().GetUnit() == eCSSUnit_None,
+ "bad unit for linear shape");
+ NS_ASSERTION(gradient->GetRadialSize().GetUnit() == eCSSUnit_None,
+ "bad unit for linear size");
+ aResult.mShape = NS_STYLE_GRADIENT_SHAPE_LINEAR;
+ aResult.mSize = NS_STYLE_GRADIENT_SIZE_FARTHEST_CORNER;
+ }
+
+ aResult.mLegacySyntax = gradient->mIsLegacySyntax;
+
+ // bg-position
+ SetGradientCoord(gradient->mBgPos.mXValue, aPresContext, aContext,
+ aResult.mBgPosX, aConditions);
+
+ SetGradientCoord(gradient->mBgPos.mYValue, aPresContext, aContext,
+ aResult.mBgPosY, aConditions);
+
+ aResult.mRepeating = gradient->mIsRepeating;
+
+ // angle
+ const nsStyleCoord dummyParentCoord;
+ if (!SetCoord(gradient->mAngle, aResult.mAngle, dummyParentCoord, SETCOORD_ANGLE,
+ aContext, aPresContext, aConditions)) {
+ NS_ASSERTION(gradient->mAngle.GetUnit() == eCSSUnit_None,
+ "bad unit for gradient angle");
+ aResult.mAngle.SetNoneValue();
+ }
+
+ // stops
+ for (uint32_t i = 0; i < gradient->mStops.Length(); i++) {
+ nsStyleGradientStop stop;
+ const nsCSSValueGradientStop &valueStop = gradient->mStops[i];
+
+ if (!SetCoord(valueStop.mLocation, stop.mLocation,
+ nsStyleCoord(), SETCOORD_LPO | SETCOORD_STORE_CALC,
+ aContext, aPresContext, aConditions)) {
+ NS_NOTREACHED("unexpected unit for gradient stop location");
+ }
+
+ stop.mIsInterpolationHint = valueStop.mIsInterpolationHint;
+
+ // inherit is not a valid color for stops, so we pass in a dummy
+ // parent color
+ NS_ASSERTION(valueStop.mColor.GetUnit() != eCSSUnit_Inherit,
+ "inherit is not a valid color for gradient stops");
+ if (!valueStop.mIsInterpolationHint) {
+ SetColor(valueStop.mColor, NS_RGB(0, 0, 0), aPresContext,
+ aContext, stop.mColor, aConditions);
+ } else {
+ // Always initialize to the same color so we don't need to worry
+ // about comparisons.
+ stop.mColor = NS_RGB(0, 0, 0);
+ }
+
+ aResult.mStops.AppendElement(stop);
+ }
+}
+
+// -moz-image-rect(<uri>, <top>, <right>, <bottom>, <left>)
+static void SetStyleImageToImageRect(nsStyleContext* aStyleContext,
+ const nsCSSValue& aValue,
+ nsStyleImage& aResult)
+{
+ MOZ_ASSERT(aValue.GetUnit() == eCSSUnit_Function &&
+ aValue.EqualsFunction(eCSSKeyword__moz_image_rect),
+ "the value is not valid -moz-image-rect()");
+
+ nsCSSValue::Array* arr = aValue.GetArrayValue();
+ MOZ_ASSERT(arr && arr->Count() == 6, "invalid number of arguments");
+
+ // <uri>
+ if (arr->Item(1).GetUnit() == eCSSUnit_Image) {
+ SetStyleImageRequest([&](nsStyleImageRequest* req) {
+ aResult.SetImageRequest(do_AddRef(req));
+ }, aStyleContext->PresContext(), arr->Item(1));
+ } else {
+ NS_WARNING("nsCSSValue::Image::Image() failed?");
+ }
+
+ // <top>, <right>, <bottom>, <left>
+ nsStyleSides cropRect;
+ NS_FOR_CSS_SIDES(side) {
+ nsStyleCoord coord;
+ const nsCSSValue& val = arr->Item(2 + side);
+
+#ifdef DEBUG
+ bool unitOk =
+#endif
+ SetAbsCoord(val, coord, SETCOORD_FACTOR | SETCOORD_PERCENT);
+ MOZ_ASSERT(unitOk, "Incorrect data structure created by CSS parser");
+ cropRect.Set(side, coord);
+ }
+ aResult.SetCropRect(MakeUnique<nsStyleSides>(cropRect));
+}
+
+static void SetStyleImage(nsStyleContext* aStyleContext,
+ const nsCSSValue& aValue,
+ nsStyleImage& aResult,
+ RuleNodeCacheConditions& aConditions)
+{
+ if (aValue.GetUnit() == eCSSUnit_Null) {
+ return;
+ }
+
+ aResult.SetNull();
+
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Image:
+ SetStyleImageRequest([&](nsStyleImageRequest* req) {
+ aResult.SetImageRequest(do_AddRef(req));
+ }, aStyleContext->PresContext(), aValue);
+ break;
+ case eCSSUnit_Function:
+ if (aValue.EqualsFunction(eCSSKeyword__moz_image_rect)) {
+ SetStyleImageToImageRect(aStyleContext, aValue, aResult);
+ } else {
+ NS_NOTREACHED("-moz-image-rect() is the only expected function");
+ }
+ break;
+ case eCSSUnit_Gradient:
+ {
+ nsStyleGradient* gradient = new nsStyleGradient();
+ SetGradient(aValue, aStyleContext->PresContext(), aStyleContext,
+ *gradient, aConditions);
+ aResult.SetGradientData(gradient);
+ break;
+ }
+ case eCSSUnit_Element:
+ aResult.SetElementId(aValue.GetStringBufferValue());
+ break;
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ case eCSSUnit_None:
+ break;
+ case eCSSUnit_URL:
+ {
+#ifdef DEBUG
+ // eCSSUnit_URL is expected only if
+ // 1. we have eCSSUnit_URL values for if-visited style contexts, which
+ // we can safely treat like 'none'.
+ // 2. aValue is a local-ref URL, e.g. url(#foo).
+ // 3. aValue is a not a local-ref URL, but it refers to an element in
+ // the current document. For example, the url of the current document
+ // is "http://foo.html" and aValue is url(http://foo.html#foo).
+ //
+ // We skip image download in TryToStartImageLoadOnValue under #2 and #3,
+ // and that's part of reasons we get eCSSUnit_URL instead of
+ // eCSSUnit_Image here.
+
+ // Check #2.
+ bool isLocalRef = aValue.GetURLStructValue()->IsLocalRef();
+
+ // Check #3.
+ bool isEqualExceptRef = false;
+ if (!isLocalRef) {
+ nsIDocument* currentDoc = aStyleContext->PresContext()->Document();
+ nsIURI* docURI = currentDoc->GetDocumentURI();
+ nsIURI* imageURI = aValue.GetURLValue();
+ imageURI->EqualsExceptRef(docURI, &isEqualExceptRef);
+ }
+
+ MOZ_ASSERT(aStyleContext->IsStyleIfVisited() || isEqualExceptRef ||
+ isLocalRef,
+ "unexpected unit; maybe nsCSSValue::Image::Image() failed?");
+#endif
+
+ break;
+ }
+ default:
+ MOZ_ASSERT_UNREACHABLE("Unexpected Unit type.");
+ break;
+ }
+}
+
+struct SetEnumValueHelper
+{
+ template<typename FieldT>
+ static void SetIntegerValue(FieldT&, const nsCSSValue&)
+ {
+ // FIXME Is it possible to turn this assertion into a compilation error?
+ MOZ_ASSERT_UNREACHABLE("inappropriate unit");
+ }
+
+#define DEFINE_ENUM_CLASS_SETTER(type_, min_, max_) \
+ static void SetEnumeratedValue(type_& aField, const nsCSSValue& aValue) \
+ { \
+ auto value = aValue.GetIntValue(); \
+ MOZ_ASSERT(value >= static_cast<decltype(value)>(type_::min_) && \
+ value <= static_cast<decltype(value)>(type_::max_), \
+ "inappropriate value"); \
+ aField = static_cast<type_>(value); \
+ }
+
+ DEFINE_ENUM_CLASS_SETTER(StyleBoxAlign, Stretch, End)
+ DEFINE_ENUM_CLASS_SETTER(StyleBoxDecorationBreak, Slice, Clone)
+ DEFINE_ENUM_CLASS_SETTER(StyleBoxDirection, Normal, Reverse)
+ DEFINE_ENUM_CLASS_SETTER(StyleBoxOrient, Horizontal, Vertical)
+ DEFINE_ENUM_CLASS_SETTER(StyleBoxPack, Start, Justify)
+ DEFINE_ENUM_CLASS_SETTER(StyleBoxSizing, Content, Border)
+ DEFINE_ENUM_CLASS_SETTER(StyleClear, None, Both)
+ DEFINE_ENUM_CLASS_SETTER(StyleFillRule, Nonzero, Evenodd)
+ DEFINE_ENUM_CLASS_SETTER(StyleFloat, None, InlineEnd)
+ DEFINE_ENUM_CLASS_SETTER(StyleFloatEdge, ContentBox, MarginBox)
+ DEFINE_ENUM_CLASS_SETTER(StyleUserFocus, None, SelectMenu)
+ DEFINE_ENUM_CLASS_SETTER(StyleUserSelect, None, MozText)
+ DEFINE_ENUM_CLASS_SETTER(StyleUserInput, None, Auto)
+ DEFINE_ENUM_CLASS_SETTER(StyleUserModify, ReadOnly, WriteOnly)
+ DEFINE_ENUM_CLASS_SETTER(StyleWindowDragging, Default, NoDrag)
+ DEFINE_ENUM_CLASS_SETTER(StyleOrient, Inline, Vertical)
+#ifdef MOZ_XUL
+ DEFINE_ENUM_CLASS_SETTER(StyleDisplay, None, Popup)
+#else
+ DEFINE_ENUM_CLASS_SETTER(StyleDisplay, None, InlineBox)
+#endif
+
+#undef DEF_SET_ENUMERATED_VALUE
+};
+
+template<typename FieldT>
+struct SetIntegerValueHelper
+{
+ static void SetIntegerValue(FieldT& aField, const nsCSSValue& aValue)
+ {
+ aField = aValue.GetIntValue();
+ }
+ static void SetEnumeratedValue(FieldT& aField, const nsCSSValue& aValue)
+ {
+ aField = aValue.GetIntValue();
+ }
+};
+
+template<typename FieldT>
+struct SetValueHelper : Conditional<IsEnum<FieldT>::value,
+ SetEnumValueHelper,
+ SetIntegerValueHelper<FieldT>>::Type
+{
+ template<typename ValueT>
+ static void SetValue(FieldT& aField, const ValueT& aValue)
+ {
+ aField = aValue;
+ }
+ static void SetValue(FieldT&, unused_t)
+ {
+ // FIXME Is it possible to turn this assertion into a compilation error?
+ MOZ_ASSERT_UNREACHABLE("inappropriate unit");
+ }
+};
+
+
+// flags for SetValue - align values with SETCOORD_* constants
+// where possible
+
+#define SETVAL_INTEGER 0x40 // I
+#define SETVAL_ENUMERATED 0x80 // E
+#define SETVAL_UNSET_INHERIT 0x00400000
+#define SETVAL_UNSET_INITIAL 0x00800000
+
+// no caller cares whether aField was changed or not
+template<typename FieldT, typename InitialT,
+ typename AutoT, typename NoneT, typename NormalT, typename SysFontT>
+static void
+SetValue(const nsCSSValue& aValue, FieldT& aField,
+ RuleNodeCacheConditions& aConditions, uint32_t aMask,
+ FieldT aParentValue,
+ InitialT aInitialValue,
+ AutoT aAutoValue,
+ NoneT aNoneValue,
+ NormalT aNormalValue,
+ SysFontT aSystemFontValue)
+{
+ typedef SetValueHelper<FieldT> Helper;
+
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Null:
+ return;
+
+ // every caller of SetValue provides inherit and initial
+ // alternatives, so we don't require them to say so in the mask
+ case eCSSUnit_Inherit:
+ aConditions.SetUncacheable();
+ aField = aParentValue;
+ return;
+
+ case eCSSUnit_Initial:
+ Helper::SetValue(aField, aInitialValue);
+ return;
+
+ // every caller provides one or other of these alternatives,
+ // but they have to say which
+ case eCSSUnit_Enumerated:
+ if (aMask & SETVAL_ENUMERATED) {
+ Helper::SetEnumeratedValue(aField, aValue);
+ return;
+ }
+ break;
+
+ case eCSSUnit_Integer:
+ if (aMask & SETVAL_INTEGER) {
+ Helper::SetIntegerValue(aField, aValue);
+ return;
+ }
+ break;
+
+ // remaining possibilities in descending order of frequency of use
+ case eCSSUnit_Auto:
+ Helper::SetValue(aField, aAutoValue);
+ return;
+
+ case eCSSUnit_None:
+ Helper::SetValue(aField, aNoneValue);
+ return;
+
+ case eCSSUnit_Normal:
+ Helper::SetValue(aField, aNormalValue);
+ return;
+
+ case eCSSUnit_System_Font:
+ Helper::SetValue(aField, aSystemFontValue);
+ return;
+
+ case eCSSUnit_Unset:
+ if (aMask & SETVAL_UNSET_INHERIT) {
+ aConditions.SetUncacheable();
+ aField = aParentValue;
+ return;
+ }
+ if (aMask & SETVAL_UNSET_INITIAL) {
+ Helper::SetValue(aField, aInitialValue);
+ return;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ NS_NOTREACHED("SetValue: inappropriate unit");
+}
+
+template <typename FieldT, typename T1>
+static void
+SetValue(const nsCSSValue& aValue, FieldT& aField,
+ RuleNodeCacheConditions& aConditions, uint32_t aMask,
+ FieldT aParentValue, T1 aInitialValue)
+{
+ SetValue(aValue, aField, aConditions, aMask, aParentValue,
+ aInitialValue, Unused, Unused, Unused, Unused);
+}
+
+// flags for SetFactor
+#define SETFCT_POSITIVE 0x01 // assert value is >= 0.0f
+#define SETFCT_OPACITY 0x02 // clamp value to [0.0f .. 1.0f]
+#define SETFCT_NONE 0x04 // allow _None (uses aInitialValue).
+#define SETFCT_UNSET_INHERIT 0x00400000
+#define SETFCT_UNSET_INITIAL 0x00800000
+
+static void
+SetFactor(const nsCSSValue& aValue, float& aField, RuleNodeCacheConditions& aConditions,
+ float aParentValue, float aInitialValue, uint32_t aFlags = 0)
+{
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Null:
+ return;
+
+ case eCSSUnit_Number:
+ aField = aValue.GetFloatValue();
+ if (aFlags & SETFCT_POSITIVE) {
+ NS_ASSERTION(aField >= 0.0f, "negative value for positive-only property");
+ if (aField < 0.0f)
+ aField = 0.0f;
+ }
+ if (aFlags & SETFCT_OPACITY) {
+ if (aField < 0.0f)
+ aField = 0.0f;
+ if (aField > 1.0f)
+ aField = 1.0f;
+ }
+ return;
+
+ case eCSSUnit_Inherit:
+ aConditions.SetUncacheable();
+ aField = aParentValue;
+ return;
+
+ case eCSSUnit_Initial:
+ aField = aInitialValue;
+ return;
+
+ case eCSSUnit_None:
+ if (aFlags & SETFCT_NONE) {
+ aField = aInitialValue;
+ return;
+ }
+ break;
+
+ case eCSSUnit_Unset:
+ if (aFlags & SETFCT_UNSET_INHERIT) {
+ aConditions.SetUncacheable();
+ aField = aParentValue;
+ return;
+ }
+ if (aFlags & SETFCT_UNSET_INITIAL) {
+ aField = aInitialValue;
+ return;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ NS_NOTREACHED("SetFactor: inappropriate unit");
+}
+
+void*
+nsRuleNode::operator new(size_t sz, nsPresContext* aPresContext)
+{
+ // Check the recycle list first.
+ return aPresContext->PresShell()->AllocateByObjectID(eArenaObjectID_nsRuleNode, sz);
+}
+
+// Overridden to prevent the global delete from being called, since the memory
+// came out of an nsIArena instead of the global delete operator's heap.
+void
+nsRuleNode::Destroy()
+{
+ // Destroy ourselves.
+ this->~nsRuleNode();
+
+ // Don't let the memory be freed, since it will be recycled
+ // instead. Don't call the global operator delete.
+ mPresContext->PresShell()->FreeByObjectID(eArenaObjectID_nsRuleNode, this);
+}
+
+already_AddRefed<nsRuleNode>
+nsRuleNode::CreateRootNode(nsPresContext* aPresContext)
+{
+ return do_AddRef(new (aPresContext)
+ nsRuleNode(aPresContext, nullptr, nullptr, SheetType::Unknown, false));
+}
+
+nsRuleNode::nsRuleNode(nsPresContext* aContext, nsRuleNode* aParent,
+ nsIStyleRule* aRule, SheetType aLevel,
+ bool aIsImportant)
+ : mPresContext(aContext),
+ mParent(aParent),
+ mRule(aRule),
+ mNextSibling(nullptr),
+ mDependentBits((uint32_t(aLevel) << NS_RULE_NODE_LEVEL_SHIFT) |
+ (aIsImportant ? NS_RULE_NODE_IS_IMPORTANT : 0)),
+ mNoneBits(aParent ? aParent->mNoneBits & NS_RULE_NODE_HAS_ANIMATION_DATA :
+ 0),
+ mRefCnt(0)
+{
+ MOZ_ASSERT(aContext);
+ MOZ_ASSERT(IsRoot() == !aRule,
+ "non-root rule nodes must have a rule");
+
+ mChildren.asVoid = nullptr;
+ MOZ_COUNT_CTOR(nsRuleNode);
+
+ NS_ASSERTION(IsRoot() || GetLevel() == aLevel, "not enough bits");
+ NS_ASSERTION(IsRoot() || IsImportantRule() == aIsImportant, "yikes");
+ MOZ_ASSERT(aContext->StyleSet()->IsGecko(),
+ "ServoStyleSets should not have rule nodes");
+ aContext->StyleSet()->AsGecko()->RuleNodeUnused(this, /* aMayGC = */ false);
+
+ // nsStyleSet::GetContext depends on there being only one animation
+ // rule.
+ MOZ_ASSERT(IsRoot() || GetLevel() != SheetType::Animation ||
+ mParent->IsRoot() ||
+ mParent->GetLevel() != SheetType::Animation,
+ "must be only one rule at animation level");
+}
+
+nsRuleNode::~nsRuleNode()
+{
+ MOZ_ASSERT(!HaveChildren());
+ MOZ_COUNT_DTOR(nsRuleNode);
+ if (mParent) {
+ mParent->RemoveChild(this);
+ }
+
+ if (mStyleData.mResetData || mStyleData.mInheritedData)
+ mStyleData.Destroy(mDependentBits, mPresContext);
+}
+
+nsRuleNode*
+nsRuleNode::Transition(nsIStyleRule* aRule, SheetType aLevel,
+ bool aIsImportantRule)
+{
+#ifdef DEBUG
+ {
+ RefPtr<css::Declaration> declaration(do_QueryObject(aRule));
+ MOZ_ASSERT(!declaration || !declaration->IsMutable(),
+ "caller must call Declaration::SetImmutable first");
+ }
+#endif
+
+ nsRuleNode* next = nullptr;
+ nsRuleNode::Key key(aRule, aLevel, aIsImportantRule);
+
+ if (HaveChildren() && !ChildrenAreHashed()) {
+ int32_t numKids = 0;
+ nsRuleNode* curr = ChildrenList();
+ while (curr && curr->GetKey() != key) {
+ curr = curr->mNextSibling;
+ ++numKids;
+ }
+ if (curr)
+ next = curr;
+ else if (numKids >= kMaxChildrenInList)
+ ConvertChildrenToHash(numKids);
+ }
+
+ if (ChildrenAreHashed()) {
+ auto entry =
+ static_cast<ChildrenHashEntry*>(ChildrenHash()->Add(&key, fallible));
+ if (!entry) {
+ NS_WARNING("out of memory");
+ return this;
+ }
+ if (entry->mRuleNode)
+ next = entry->mRuleNode;
+ else {
+ next = entry->mRuleNode = new (mPresContext)
+ nsRuleNode(mPresContext, this, aRule, aLevel, aIsImportantRule);
+ }
+ } else if (!next) {
+ // Create the new entry in our list.
+ next = new (mPresContext)
+ nsRuleNode(mPresContext, this, aRule, aLevel, aIsImportantRule);
+ next->mNextSibling = ChildrenList();
+ SetChildrenList(next);
+ }
+
+ return next;
+}
+
+nsRuleNode*
+nsRuleNode::RuleTree()
+{
+ nsRuleNode* n = this;
+ while (n->mParent) {
+ n = n->mParent;
+ }
+ return n;
+}
+
+void nsRuleNode::SetUsedDirectly()
+{
+ mDependentBits |= NS_RULE_NODE_USED_DIRECTLY;
+
+ // Maintain the invariant that any rule node that is used directly has
+ // all structs that live in the rule tree cached (which
+ // nsRuleNode::GetStyleData depends on for speed).
+ if (mDependentBits & NS_STYLE_INHERIT_MASK) {
+ for (nsStyleStructID sid = nsStyleStructID(0); sid < nsStyleStructID_Length;
+ sid = nsStyleStructID(sid + 1)) {
+ uint32_t bit = nsCachedStyleData::GetBitForSID(sid);
+ if (mDependentBits & bit) {
+ nsRuleNode *source = mParent;
+ while ((source->mDependentBits & bit) && !source->IsUsedDirectly()) {
+ source = source->mParent;
+ }
+ void *data = source->mStyleData.GetStyleData(sid);
+ NS_ASSERTION(data, "unexpected null struct");
+ mStyleData.SetStyleData(sid, mPresContext, data);
+ }
+ }
+ }
+}
+
+void
+nsRuleNode::ConvertChildrenToHash(int32_t aNumKids)
+{
+ NS_ASSERTION(!ChildrenAreHashed() && HaveChildren(),
+ "must have a non-empty list of children");
+ PLDHashTable *hash = new PLDHashTable(&ChildrenHashOps,
+ sizeof(ChildrenHashEntry),
+ aNumKids);
+ for (nsRuleNode* curr = ChildrenList(); curr; curr = curr->mNextSibling) {
+ Key key = curr->GetKey();
+ // This will never fail because of the initial size we gave the table.
+ auto entry =
+ static_cast<ChildrenHashEntry*>(hash->Add(&key));
+ NS_ASSERTION(!entry->mRuleNode, "duplicate entries in list");
+ entry->mRuleNode = curr;
+ }
+ SetChildrenHash(hash);
+}
+
+void
+nsRuleNode::RemoveChild(nsRuleNode* aNode)
+{
+ MOZ_ASSERT(HaveChildren());
+ if (ChildrenAreHashed()) {
+ PLDHashTable* children = ChildrenHash();
+ Key key = aNode->GetKey();
+ MOZ_ASSERT(children->Search(&key));
+ children->Remove(&key);
+ if (children->EntryCount() == 0) {
+ delete children;
+ mChildren.asVoid = nullptr;
+ }
+ } else {
+ // This linear traversal is unfortunate, but we do the same thing when
+ // adding nodes. The traversal is bounded by kMaxChildrenInList.
+ nsRuleNode** curr = &mChildren.asList;
+ while (*curr != aNode) {
+ curr = &((*curr)->mNextSibling);
+ MOZ_ASSERT(*curr);
+ }
+ *curr = (*curr)->mNextSibling;
+
+ // If there was one element in the list, this sets mChildren.asList
+ // to 0, and HaveChildren() will return false.
+ }
+}
+
+inline void
+nsRuleNode::PropagateNoneBit(uint32_t aBit, nsRuleNode* aHighestNode)
+{
+ nsRuleNode* curr = this;
+ for (;;) {
+ NS_ASSERTION(!(curr->mNoneBits & aBit), "propagating too far");
+ curr->mNoneBits |= aBit;
+ if (curr == aHighestNode)
+ break;
+ curr = curr->mParent;
+ }
+}
+
+inline void
+nsRuleNode::PropagateDependentBit(nsStyleStructID aSID, nsRuleNode* aHighestNode,
+ void* aStruct)
+{
+ NS_ASSERTION(aStruct, "expected struct");
+
+ uint32_t bit = nsCachedStyleData::GetBitForSID(aSID);
+ for (nsRuleNode* curr = this; curr != aHighestNode; curr = curr->mParent) {
+ if (curr->mDependentBits & bit) {
+#ifdef DEBUG
+ while (curr != aHighestNode) {
+ NS_ASSERTION(curr->mDependentBits & bit, "bit not set");
+ curr = curr->mParent;
+ }
+#endif
+ break;
+ }
+
+ curr->mDependentBits |= bit;
+
+ if (curr->IsUsedDirectly()) {
+ curr->mStyleData.SetStyleData(aSID, mPresContext, aStruct);
+ }
+ }
+}
+
+/* static */ void
+nsRuleNode::PropagateGrandancestorBit(nsStyleContext* aContext,
+ nsStyleContext* aContextInheritedFrom)
+{
+ MOZ_ASSERT(aContext);
+ MOZ_ASSERT(aContextInheritedFrom &&
+ aContextInheritedFrom != aContext,
+ "aContextInheritedFrom must be an ancestor of aContext");
+
+ for (nsStyleContext* context = aContext->GetParent();
+ context != aContextInheritedFrom;
+ context = context->GetParent()) {
+ if (!context) {
+ MOZ_ASSERT(false, "aContextInheritedFrom must be an ancestor of "
+ "aContext's parent");
+ break;
+ }
+ context->AddStyleBit(NS_STYLE_CHILD_USES_GRANDANCESTOR_STYLE);
+ }
+}
+
+/*
+ * The following "Check" functions are used for determining what type of
+ * sharing can be used for the data on this rule node. MORE HERE...
+ */
+
+/*
+ * a callback function that that can revise the result of
+ * CheckSpecifiedProperties before finishing; aResult is the current
+ * result, and it returns the revised one.
+ */
+typedef nsRuleNode::RuleDetail
+ (* CheckCallbackFn)(const nsRuleData* aRuleData,
+ nsRuleNode::RuleDetail aResult);
+
+/**
+ * @param aValue the value being examined
+ * @param aSpecifiedCount to be incremented by one if the value is specified
+ * @param aInheritedCount to be incremented by one if the value is set to inherit
+ * @param aUnsetCount to be incremented by one if the value is set to unset
+ */
+inline void
+ExamineCSSValue(const nsCSSValue& aValue,
+ uint32_t& aSpecifiedCount,
+ uint32_t& aInheritedCount,
+ uint32_t& aUnsetCount)
+{
+ if (aValue.GetUnit() != eCSSUnit_Null) {
+ ++aSpecifiedCount;
+ if (aValue.GetUnit() == eCSSUnit_Inherit) {
+ ++aInheritedCount;
+ } else if (aValue.GetUnit() == eCSSUnit_Unset) {
+ ++aUnsetCount;
+ }
+ }
+}
+
+static nsRuleNode::RuleDetail
+CheckFontCallback(const nsRuleData* aRuleData,
+ nsRuleNode::RuleDetail aResult)
+{
+ // em, ex, percent, 'larger', and 'smaller' values on font-size depend
+ // on the parent context's font-size
+ // Likewise, 'lighter' and 'bolder' values of 'font-weight', and 'wider'
+ // and 'narrower' values of 'font-stretch' depend on the parent.
+ const nsCSSValue& size = *aRuleData->ValueForFontSize();
+ const nsCSSValue& weight = *aRuleData->ValueForFontWeight();
+ if ((size.IsRelativeLengthUnit() && size.GetUnit() != eCSSUnit_RootEM) ||
+ size.GetUnit() == eCSSUnit_Percent ||
+ (size.GetUnit() == eCSSUnit_Enumerated &&
+ (size.GetIntValue() == NS_STYLE_FONT_SIZE_SMALLER ||
+ size.GetIntValue() == NS_STYLE_FONT_SIZE_LARGER)) ||
+ aRuleData->ValueForScriptLevel()->GetUnit() == eCSSUnit_Integer ||
+ (weight.GetUnit() == eCSSUnit_Enumerated &&
+ (weight.GetIntValue() == NS_STYLE_FONT_WEIGHT_BOLDER ||
+ weight.GetIntValue() == NS_STYLE_FONT_WEIGHT_LIGHTER))) {
+ NS_ASSERTION(aResult == nsRuleNode::eRulePartialReset ||
+ aResult == nsRuleNode::eRuleFullReset ||
+ aResult == nsRuleNode::eRulePartialMixed ||
+ aResult == nsRuleNode::eRuleFullMixed,
+ "we know we already have a reset-counted property");
+ // Promote reset to mixed since we have something that depends on
+ // the parent. But never promote to inherited since that could
+ // cause inheritance of the exact value.
+ if (aResult == nsRuleNode::eRulePartialReset)
+ aResult = nsRuleNode::eRulePartialMixed;
+ else if (aResult == nsRuleNode::eRuleFullReset)
+ aResult = nsRuleNode::eRuleFullMixed;
+ }
+
+ return aResult;
+}
+
+static nsRuleNode::RuleDetail
+CheckColorCallback(const nsRuleData* aRuleData,
+ nsRuleNode::RuleDetail aResult)
+{
+ // currentColor values for color require inheritance
+ const nsCSSValue* colorValue = aRuleData->ValueForColor();
+ if (colorValue->GetUnit() == eCSSUnit_EnumColor &&
+ colorValue->GetIntValue() == NS_COLOR_CURRENTCOLOR) {
+ NS_ASSERTION(aResult == nsRuleNode::eRuleFullReset,
+ "we should already be counted as full-reset");
+ aResult = nsRuleNode::eRuleFullInherited;
+ }
+
+ return aResult;
+}
+
+static nsRuleNode::RuleDetail
+CheckTextCallback(const nsRuleData* aRuleData,
+ nsRuleNode::RuleDetail aResult)
+{
+ const nsCSSValue* textAlignValue = aRuleData->ValueForTextAlign();
+ if (textAlignValue->GetUnit() == eCSSUnit_Enumerated &&
+ (textAlignValue->GetIntValue() ==
+ NS_STYLE_TEXT_ALIGN_MOZ_CENTER_OR_INHERIT ||
+ textAlignValue->GetIntValue() == NS_STYLE_TEXT_ALIGN_MATCH_PARENT)) {
+ // Promote reset to mixed since we have something that depends on
+ // the parent.
+ if (aResult == nsRuleNode::eRulePartialReset)
+ aResult = nsRuleNode::eRulePartialMixed;
+ else if (aResult == nsRuleNode::eRuleFullReset)
+ aResult = nsRuleNode::eRuleFullMixed;
+ }
+
+ return aResult;
+}
+
+static nsRuleNode::RuleDetail
+CheckVariablesCallback(const nsRuleData* aRuleData,
+ nsRuleNode::RuleDetail aResult)
+{
+ // We don't actually have any properties on nsStyleVariables, so we do
+ // all of the RuleDetail calculation in here.
+ if (aRuleData->mVariables) {
+ return nsRuleNode::eRulePartialMixed;
+ }
+ return nsRuleNode::eRuleNone;
+}
+
+#define FLAG_DATA_FOR_PROPERTY(name_, id_, method_, flags_, pref_, \
+ parsevariant_, kwtable_, stylestructoffset_, \
+ animtype_) \
+ flags_,
+
+// The order here must match the enums in *CheckCounter in nsCSSProps.cpp.
+
+static const uint32_t gFontFlags[] = {
+#define CSS_PROP_FONT FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_FONT
+};
+
+static const uint32_t gDisplayFlags[] = {
+#define CSS_PROP_DISPLAY FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_DISPLAY
+};
+
+static const uint32_t gVisibilityFlags[] = {
+#define CSS_PROP_VISIBILITY FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_VISIBILITY
+};
+
+static const uint32_t gMarginFlags[] = {
+#define CSS_PROP_MARGIN FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_MARGIN
+};
+
+static const uint32_t gBorderFlags[] = {
+#define CSS_PROP_BORDER FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_BORDER
+};
+
+static const uint32_t gPaddingFlags[] = {
+#define CSS_PROP_PADDING FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_PADDING
+};
+
+static const uint32_t gOutlineFlags[] = {
+#define CSS_PROP_OUTLINE FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_OUTLINE
+};
+
+static const uint32_t gListFlags[] = {
+#define CSS_PROP_LIST FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_LIST
+};
+
+static const uint32_t gColorFlags[] = {
+#define CSS_PROP_COLOR FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_COLOR
+};
+
+static const uint32_t gBackgroundFlags[] = {
+#define CSS_PROP_BACKGROUND FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_BACKGROUND
+};
+
+static const uint32_t gPositionFlags[] = {
+#define CSS_PROP_POSITION FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_POSITION
+};
+
+static const uint32_t gTableFlags[] = {
+#define CSS_PROP_TABLE FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_TABLE
+};
+
+static const uint32_t gTableBorderFlags[] = {
+#define CSS_PROP_TABLEBORDER FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_TABLEBORDER
+};
+
+static const uint32_t gContentFlags[] = {
+#define CSS_PROP_CONTENT FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_CONTENT
+};
+
+static const uint32_t gTextFlags[] = {
+#define CSS_PROP_TEXT FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_TEXT
+};
+
+static const uint32_t gTextResetFlags[] = {
+#define CSS_PROP_TEXTRESET FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_TEXTRESET
+};
+
+static const uint32_t gUserInterfaceFlags[] = {
+#define CSS_PROP_USERINTERFACE FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_USERINTERFACE
+};
+
+static const uint32_t gUIResetFlags[] = {
+#define CSS_PROP_UIRESET FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_UIRESET
+};
+
+static const uint32_t gXULFlags[] = {
+#define CSS_PROP_XUL FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_XUL
+};
+
+static const uint32_t gSVGFlags[] = {
+#define CSS_PROP_SVG FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_SVG
+};
+
+static const uint32_t gSVGResetFlags[] = {
+#define CSS_PROP_SVGRESET FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_SVGRESET
+};
+
+static const uint32_t gColumnFlags[] = {
+#define CSS_PROP_COLUMN FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_COLUMN
+};
+
+// There are no properties in nsStyleVariables, but we can't have a
+// zero length array.
+static const uint32_t gVariablesFlags[] = {
+ 0,
+#define CSS_PROP_VARIABLES FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_VARIABLES
+};
+static_assert(sizeof(gVariablesFlags) == sizeof(uint32_t),
+ "if nsStyleVariables has properties now you can remove the dummy "
+ "gVariablesFlags entry");
+
+static const uint32_t gEffectsFlags[] = {
+#define CSS_PROP_EFFECTS FLAG_DATA_FOR_PROPERTY
+#include "nsCSSPropList.h"
+#undef CSS_PROP_EFFECTS
+};
+
+#undef FLAG_DATA_FOR_PROPERTY
+
+static const uint32_t* gFlagsByStruct[] = {
+
+#define STYLE_STRUCT(name, checkdata_cb) \
+ g##name##Flags,
+#include "nsStyleStructList.h"
+#undef STYLE_STRUCT
+
+};
+
+static const CheckCallbackFn gCheckCallbacks[] = {
+
+#define STYLE_STRUCT(name, checkdata_cb) \
+ checkdata_cb,
+#include "nsStyleStructList.h"
+#undef STYLE_STRUCT
+
+};
+
+#ifdef DEBUG
+static bool
+AreAllMathMLPropertiesUndefined(const nsRuleData* aRuleData)
+{
+ return
+ aRuleData->ValueForScriptLevel()->GetUnit() == eCSSUnit_Null &&
+ aRuleData->ValueForScriptSizeMultiplier()->GetUnit() == eCSSUnit_Null &&
+ aRuleData->ValueForScriptMinSize()->GetUnit() == eCSSUnit_Null &&
+ aRuleData->ValueForMathVariant()->GetUnit() == eCSSUnit_Null &&
+ aRuleData->ValueForMathDisplay()->GetUnit() == eCSSUnit_Null;
+}
+#endif
+
+inline nsRuleNode::RuleDetail
+nsRuleNode::CheckSpecifiedProperties(const nsStyleStructID aSID,
+ const nsRuleData* aRuleData)
+{
+ // Build a count of the:
+ uint32_t total = 0, // total number of props in the struct
+ specified = 0, // number that were specified for this node
+ inherited = 0, // number that were 'inherit' (and not
+ // eCSSUnit_Inherit) for this node
+ unset = 0; // number that were 'unset'
+
+ // See comment in nsRuleData.h above mValueOffsets.
+ MOZ_ASSERT(aRuleData->mValueOffsets[aSID] == 0,
+ "we assume the value offset is zero instead of adding it");
+ for (nsCSSValue *values = aRuleData->mValueStorage,
+ *values_end = values + nsCSSProps::PropertyCountInStruct(aSID);
+ values != values_end; ++values) {
+ ++total;
+ ExamineCSSValue(*values, specified, inherited, unset);
+ }
+
+ if (!nsCachedStyleData::IsReset(aSID)) {
+ // For inherited properties, 'unset' means the same as 'inherit'.
+ inherited += unset;
+ unset = 0;
+ }
+
+#if 0
+ printf("CheckSpecifiedProperties: SID=%d total=%d spec=%d inh=%d.\n",
+ aSID, total, specified, inherited);
+#endif
+
+ NS_ASSERTION(aSID != eStyleStruct_Font ||
+ mPresContext->Document()->GetMathMLEnabled() ||
+ AreAllMathMLPropertiesUndefined(aRuleData),
+ "MathML style property was defined even though MathML is disabled");
+
+ /*
+ * Return the most specific information we can: prefer None or Full
+ * over Partial, and Reset or Inherited over Mixed, since we can
+ * optimize based on the edge cases and not the in-between cases.
+ */
+ nsRuleNode::RuleDetail result;
+ if (inherited == total)
+ result = eRuleFullInherited;
+ else if (specified == total
+ // MathML defines 5 properties in Font that will never be set when
+ // MathML is not in use. Therefore if all but five
+ // properties have been set, and MathML is not enabled, we can treat
+ // this as fully specified. Code in nsMathMLElementFactory will
+ // rebuild the rule tree and style data when MathML is first enabled
+ // (see nsMathMLElement::BindToTree).
+ || (aSID == eStyleStruct_Font && specified + 5 == total &&
+ !mPresContext->Document()->GetMathMLEnabled())
+ ) {
+ if (inherited == 0)
+ result = eRuleFullReset;
+ else
+ result = eRuleFullMixed;
+ } else if (specified == 0)
+ result = eRuleNone;
+ else if (specified == inherited)
+ result = eRulePartialInherited;
+ else if (inherited == 0)
+ result = eRulePartialReset;
+ else
+ result = eRulePartialMixed;
+
+ CheckCallbackFn cb = gCheckCallbacks[aSID];
+ if (cb) {
+ result = (*cb)(aRuleData, result);
+ }
+
+ return result;
+}
+
+// If we need to restrict which properties apply to the style context,
+// return the bit to check in nsCSSProp's flags table. Otherwise,
+// return 0.
+inline uint32_t
+GetPseudoRestriction(nsStyleContext *aContext)
+{
+ // This needs to match nsStyleSet::WalkRestrictionRule.
+ uint32_t pseudoRestriction = 0;
+ nsIAtom *pseudoType = aContext->GetPseudo();
+ if (pseudoType) {
+ if (pseudoType == nsCSSPseudoElements::firstLetter) {
+ pseudoRestriction = CSS_PROPERTY_APPLIES_TO_FIRST_LETTER;
+ } else if (pseudoType == nsCSSPseudoElements::firstLine) {
+ pseudoRestriction = CSS_PROPERTY_APPLIES_TO_FIRST_LINE;
+ } else if (pseudoType == nsCSSPseudoElements::placeholder) {
+ pseudoRestriction = CSS_PROPERTY_APPLIES_TO_PLACEHOLDER;
+ }
+ }
+ return pseudoRestriction;
+}
+
+static void
+UnsetPropertiesWithoutFlags(const nsStyleStructID aSID,
+ nsRuleData* aRuleData,
+ uint32_t aFlags)
+{
+ NS_ASSERTION(aFlags != 0, "aFlags must be nonzero");
+
+ const uint32_t *flagData = gFlagsByStruct[aSID];
+
+ // See comment in nsRuleData.h above mValueOffsets.
+ MOZ_ASSERT(aRuleData->mValueOffsets[aSID] == 0,
+ "we assume the value offset is zero instead of adding it");
+ nsCSSValue *values = aRuleData->mValueStorage;
+
+ for (size_t i = 0, i_end = nsCSSProps::PropertyCountInStruct(aSID);
+ i != i_end; ++i) {
+ if ((flagData[i] & aFlags) != aFlags)
+ values[i].Reset();
+ }
+}
+
+/**
+ * We allocate arrays of CSS values with alloca. (These arrays are a
+ * fixed size per style struct, but we don't want to waste the
+ * allocation and construction/destruction costs of the big structs when
+ * we're handling much smaller ones.) Since the lifetime of an alloca
+ * allocation is the life of the calling function, the caller must call
+ * alloca. However, to ensure that constructors and destructors are
+ * balanced, we do the constructor and destructor calling from this RAII
+ * class, AutoCSSValueArray.
+ */
+struct AutoCSSValueArray {
+ /**
+ * aStorage must be the result of alloca(aCount * sizeof(nsCSSValue))
+ */
+ AutoCSSValueArray(void* aStorage, size_t aCount) {
+ MOZ_ASSERT(size_t(aStorage) % NS_ALIGNMENT_OF(nsCSSValue) == 0,
+ "bad alignment from alloca");
+ mCount = aCount;
+ // Don't use placement new[], since it might store extra data
+ // for the count (on Windows!).
+ mArray = static_cast<nsCSSValue*>(aStorage);
+ for (size_t i = 0; i < mCount; ++i) {
+ new (KnownNotNull, mArray + i) nsCSSValue();
+ }
+ }
+
+ ~AutoCSSValueArray() {
+ for (size_t i = 0; i < mCount; ++i) {
+ mArray[i].~nsCSSValue();
+ }
+ }
+
+ nsCSSValue* get() { return mArray; }
+
+private:
+ nsCSSValue *mArray;
+ size_t mCount;
+};
+
+/* static */ bool
+nsRuleNode::ResolveVariableReferences(const nsStyleStructID aSID,
+ nsRuleData* aRuleData,
+ nsStyleContext* aContext)
+{
+ MOZ_ASSERT(aSID != eStyleStruct_Variables);
+ MOZ_ASSERT(aRuleData->mSIDs & nsCachedStyleData::GetBitForSID(aSID));
+ MOZ_ASSERT(aRuleData->mValueOffsets[aSID] == 0);
+
+ nsCSSParser parser;
+ bool anyTokenStreams = false;
+
+ // Look at each property in the nsRuleData for the given style struct.
+ size_t nprops = nsCSSProps::PropertyCountInStruct(aSID);
+ for (nsCSSValue* value = aRuleData->mValueStorage,
+ *values_end = aRuleData->mValueStorage + nprops;
+ value != values_end; value++) {
+ if (value->GetUnit() != eCSSUnit_TokenStream) {
+ continue;
+ }
+
+ const CSSVariableValues* variables =
+ &aContext->StyleVariables()->mVariables;
+ nsCSSValueTokenStream* tokenStream = value->GetTokenStreamValue();
+
+ MOZ_ASSERT(tokenStream->mLevel != SheetType::Count,
+ "Token stream should have a defined level");
+
+ AutoRestore<SheetType> saveLevel(aRuleData->mLevel);
+ aRuleData->mLevel = tokenStream->mLevel;
+
+ // Note that ParsePropertyWithVariableReferences relies on the fact
+ // that the nsCSSValue in aRuleData for the property we are re-parsing
+ // is still the token stream value. When
+ // ParsePropertyWithVariableReferences calls
+ // nsCSSExpandedDataBlock::MapRuleInfoInto, that function will add
+ // the ImageValue that is created into the token stream object's
+ // mImageValues table; see the comment above mImageValues for why.
+
+ // XXX Should pass in sheet here (see bug 952338).
+ parser.ParsePropertyWithVariableReferences(
+ tokenStream->mPropertyID, tokenStream->mShorthandPropertyID,
+ tokenStream->mTokenStream, variables, aRuleData,
+ tokenStream->mSheetURI, tokenStream->mBaseURI,
+ tokenStream->mSheetPrincipal, nullptr,
+ tokenStream->mLineNumber, tokenStream->mLineOffset);
+ aRuleData->mConditions.SetUncacheable();
+ anyTokenStreams = true;
+ }
+
+ return anyTokenStreams;
+}
+
+const void*
+nsRuleNode::WalkRuleTree(const nsStyleStructID aSID,
+ nsStyleContext* aContext)
+{
+ // use placement new[] on the result of alloca() to allocate a
+ // variable-sized stack array, including execution of constructors,
+ // and use an RAII class to run the destructors too.
+ size_t nprops = nsCSSProps::PropertyCountInStruct(aSID);
+ void* dataStorage = alloca(nprops * sizeof(nsCSSValue));
+ AutoCSSValueArray dataArray(dataStorage, nprops);
+
+ nsRuleData ruleData(nsCachedStyleData::GetBitForSID(aSID),
+ dataArray.get(), mPresContext, aContext);
+ ruleData.mValueOffsets[aSID] = 0;
+
+ // We start at the most specific rule in the tree.
+ void* startStruct = nullptr;
+
+ nsRuleNode* ruleNode = this;
+ nsRuleNode* highestNode = nullptr; // The highest node in the rule tree
+ // that has the same properties
+ // specified for struct |aSID| as
+ // |this| does.
+ nsRuleNode* rootNode = this; // After the loop below, this will be the
+ // highest node that we've walked without
+ // finding cached data on the rule tree.
+ // If we don't find any cached data, it
+ // will be the root. (XXX misnamed)
+ RuleDetail detail = eRuleNone;
+ uint32_t bit = nsCachedStyleData::GetBitForSID(aSID);
+
+ while (ruleNode) {
+ // See if this rule node has cached the fact that the remaining
+ // nodes along this path specify no data whatsoever.
+ if (ruleNode->mNoneBits & bit)
+ break;
+
+ // If the dependent bit is set on a rule node for this struct, that
+ // means its rule won't have any information to add, so skip it.
+ // NOTE: If we exit the loop because of the !IsUsedDirectly() check,
+ // then we're guaranteed to break immediately afterwards due to a
+ // non-null startStruct.
+ while ((ruleNode->mDependentBits & bit) && !ruleNode->IsUsedDirectly()) {
+ NS_ASSERTION(ruleNode->mStyleData.GetStyleData(aSID) == nullptr,
+ "dependent bit with cached data makes no sense");
+ // Climb up to the next rule in the tree (a less specific rule).
+ rootNode = ruleNode;
+ ruleNode = ruleNode->mParent;
+ NS_ASSERTION(!(ruleNode->mNoneBits & bit), "can't have both bits set");
+ }
+
+ // Check for cached data after the inner loop above -- otherwise
+ // we'll miss it.
+ startStruct = ruleNode->mStyleData.GetStyleData(aSID);
+ if (startStruct)
+ break; // We found a rule with fully specified data. We don't
+ // need to go up the tree any further, since the remainder
+ // of this branch has already been computed.
+
+ // Ask the rule to fill in the properties that it specifies.
+ nsIStyleRule *rule = ruleNode->mRule;
+ if (rule) {
+ ruleData.mLevel = ruleNode->GetLevel();
+ ruleData.mIsImportantRule = ruleNode->IsImportantRule();
+ rule->MapRuleInfoInto(&ruleData);
+ }
+
+ // Now we check to see how many properties have been specified by
+ // the rules we've examined so far.
+ RuleDetail oldDetail = detail;
+ detail = CheckSpecifiedProperties(aSID, &ruleData);
+
+ if (oldDetail == eRuleNone && detail != eRuleNone)
+ highestNode = ruleNode;
+
+ if (detail == eRuleFullReset ||
+ detail == eRuleFullMixed ||
+ detail == eRuleFullInherited)
+ break; // We don't need to examine any more rules. All properties
+ // have been fully specified.
+
+ // Climb up to the next rule in the tree (a less specific rule).
+ rootNode = ruleNode;
+ ruleNode = ruleNode->mParent;
+ }
+
+ bool recomputeDetail = false;
+
+ // If we are computing a style struct other than nsStyleVariables, and
+ // ruleData has any properties with variable references (nsCSSValues of
+ // type eCSSUnit_TokenStream), then we need to resolve these.
+ if (aSID != eStyleStruct_Variables) {
+ // A property's value might have became 'inherit' after resolving
+ // variable references. (This happens when an inherited property
+ // fails to parse its resolved value.) We need to recompute
+ // |detail| in case this happened.
+ recomputeDetail = ResolveVariableReferences(aSID, &ruleData, aContext);
+ }
+
+ // If needed, unset the properties that don't have a flag that allows
+ // them to be set for this style context. (For example, only some
+ // properties apply to :first-line and :first-letter.)
+ uint32_t pseudoRestriction = GetPseudoRestriction(aContext);
+ if (pseudoRestriction) {
+ UnsetPropertiesWithoutFlags(aSID, &ruleData, pseudoRestriction);
+
+ // We need to recompute |detail| based on the restrictions we just applied.
+ // We can adjust |detail| arbitrarily because of the restriction
+ // rule added in nsStyleSet::WalkRestrictionRule.
+ recomputeDetail = true;
+ }
+
+ if (recomputeDetail) {
+ detail = CheckSpecifiedProperties(aSID, &ruleData);
+ }
+
+ NS_ASSERTION(!startStruct || (detail != eRuleFullReset &&
+ detail != eRuleFullMixed &&
+ detail != eRuleFullInherited),
+ "can't have start struct and be fully specified");
+
+ bool isReset = nsCachedStyleData::IsReset(aSID);
+ if (!highestNode)
+ highestNode = rootNode;
+
+ MOZ_ASSERT(!(aSID == eStyleStruct_Variables && startStruct),
+ "if we start caching Variables structs in the rule tree, then "
+ "not forcing detail to eRulePartialMixed just below is no "
+ "longer valid");
+
+ if (detail == eRuleNone && isReset) {
+ // We specified absolutely no rule information for a reset struct, and we
+ // may or may not have found a parent rule in the tree that specified all
+ // the rule information. Regardless, we don't need to use any cache
+ // conditions if we cache this struct in the rule tree.
+ //
+ // Normally ruleData.mConditions would already indicate that the struct
+ // is cacheable without conditions if detail is eRuleNone, but because
+ // of the UnsetPropertiesWithoutFlags call above, we may have encountered
+ // some rules with dependencies, which we then cleared out of ruleData.
+ //
+ // ruleData.mConditions could also indicate we are not cacheable at all,
+ // such as when AnimValuesStyleRule prevents us from caching structs
+ // when attempting to apply animations to pseudos.
+ //
+ // So if we we are uncacheable, we leave it, but if we are cacheable
+ // with dependencies, we convert that to cacheable without dependencies.
+ if (ruleData.mConditions.CacheableWithDependencies()) {
+ MOZ_ASSERT(pseudoRestriction,
+ "should only be cacheable with dependencies if we had a "
+ "pseudo restriction");
+ ruleData.mConditions.Clear();
+ } else {
+ // XXXheycam We shouldn't have `|| GetLevel() == SheetType::Transition`
+ // in the assertion condition, but rule nodes created by
+ // ResolveStyleByAddingRules don't call SetIsAnimationRule().
+ MOZ_ASSERT(ruleData.mConditions.CacheableWithoutDependencies() ||
+ ((HasAnimationData() ||
+ GetLevel() == SheetType::Transition) &&
+ aContext->GetParent() &&
+ aContext->GetParent()->HasPseudoElementData()),
+ "should only be uncacheable if we had an animation rule "
+ "and we're inside a pseudo");
+ }
+ }
+
+ if (!ruleData.mConditions.CacheableWithoutDependencies() &&
+ aSID != eStyleStruct_Variables) {
+ // Treat as though some data is specified to avoid the optimizations and
+ // force data computation.
+ //
+ // We don't need to do this for Variables structs since we know those are
+ // never cached in the rule tree, and it avoids wasteful computation of a
+ // new Variables struct when we have no additional variable declarations,
+ // which otherwise could happen when there is an AnimValuesStyleRule
+ // (which calls SetUncacheable for style contexts with pseudo data).
+ detail = eRulePartialMixed;
+ }
+
+ if (detail == eRuleNone && startStruct) {
+ // We specified absolutely no rule information, but a parent rule in the tree
+ // specified all the rule information. We set a bit along the branch from our
+ // node in the tree to the node that specified the data that tells nodes on that
+ // branch that they never need to examine their rules for this particular struct type
+ // ever again.
+ PropagateDependentBit(aSID, ruleNode, startStruct);
+ // For inherited structs, mark the struct (which will be set on
+ // the context by our caller) as not being owned by the context.
+ if (!isReset) {
+ aContext->AddStyleBit(nsCachedStyleData::GetBitForSID(aSID));
+ } else if (HasAnimationData()) {
+ // If we have animation data, the struct should be cached on the style
+ // context so that we can peek the struct.
+ // See comment in AnimValuesStyleRule::MapRuleInfoInto.
+ StoreStyleOnContext(aContext, aSID, startStruct);
+ }
+
+ return startStruct;
+ }
+ if ((!startStruct && !isReset &&
+ (detail == eRuleNone || detail == eRulePartialInherited)) ||
+ detail == eRuleFullInherited) {
+ // We specified no non-inherited information and neither did any of
+ // our parent rules.
+
+ // We set a bit along the branch from the highest node (ruleNode)
+ // down to our node (this) indicating that no non-inherited data was
+ // specified. This bit is guaranteed to be set already on the path
+ // from the highest node to the root node in the case where
+ // (detail == eRuleNone), which is the most common case here.
+ // We must check |!isReset| because the Compute*Data functions for
+ // reset structs wouldn't handle none bits correctly.
+ if (highestNode != this && !isReset)
+ PropagateNoneBit(bit, highestNode);
+
+ // All information must necessarily be inherited from our parent style context.
+ // In the absence of any computed data in the rule tree and with
+ // no rules specified that didn't have values of 'inherit', we should check our parent.
+ nsStyleContext* parentContext = aContext->GetParent();
+ if (isReset) {
+ /* Reset structs don't inherit from first-line. */
+ /* See similar code in COMPUTE_START_RESET */
+ while (parentContext &&
+ parentContext->GetPseudo() == nsCSSPseudoElements::firstLine) {
+ parentContext = parentContext->GetParent();
+ }
+ if (parentContext && parentContext != aContext->GetParent()) {
+ PropagateGrandancestorBit(aContext, parentContext);
+ }
+ }
+ if (parentContext) {
+ // We have a parent, and so we should just inherit from the parent.
+ // Set the inherit bits on our context. These bits tell the style context that
+ // it never has to go back to the rule tree for data. Instead the style context tree
+ // should be walked to find the data.
+ const void* parentStruct = parentContext->StyleData(aSID);
+ aContext->AddStyleBit(bit); // makes const_cast OK.
+ aContext->SetStyle(aSID, const_cast<void*>(parentStruct));
+ if (isReset) {
+ parentContext->AddStyleBit(NS_STYLE_HAS_CHILD_THAT_USES_RESET_STYLE);
+ }
+ return parentStruct;
+ }
+ else
+ // We are the root. In the case of fonts, the default values just
+ // come from the pres context.
+ return SetDefaultOnRoot(aSID, aContext);
+ }
+
+ typedef const void* (nsRuleNode::*ComputeFunc)(void*, const nsRuleData*,
+ nsStyleContext*, nsRuleNode*,
+ RuleDetail,
+ const RuleNodeCacheConditions);
+ static const ComputeFunc sComputeFuncs[] = {
+#define STYLE_STRUCT(name, checkdata_cb) &nsRuleNode::Compute##name##Data,
+#include "nsStyleStructList.h"
+#undef STYLE_STRUCT
+ };
+
+ // We need to compute the data from the information that the rules specified.
+ return (this->*sComputeFuncs[aSID])(startStruct, &ruleData, aContext,
+ highestNode, detail,
+ ruleData.mConditions);
+}
+
+const void*
+nsRuleNode::SetDefaultOnRoot(const nsStyleStructID aSID, nsStyleContext* aContext)
+{
+ switch (aSID) {
+ case eStyleStruct_Font:
+ {
+ nsStyleFont* fontData = new (mPresContext) nsStyleFont(mPresContext);
+ nscoord minimumFontSize = mPresContext->MinFontSize(fontData->mLanguage);
+
+ if (minimumFontSize > 0 && !mPresContext->IsChrome()) {
+ fontData->mFont.size = std::max(fontData->mSize, minimumFontSize);
+ }
+ else {
+ fontData->mFont.size = fontData->mSize;
+ }
+ aContext->SetStyle(eStyleStruct_Font, fontData);
+ return fontData;
+ }
+ case eStyleStruct_Display:
+ {
+ nsStyleDisplay* disp = new (mPresContext) nsStyleDisplay(mPresContext);
+ aContext->SetStyle(eStyleStruct_Display, disp);
+ return disp;
+ }
+ case eStyleStruct_Visibility:
+ {
+ nsStyleVisibility* vis = new (mPresContext) nsStyleVisibility(mPresContext);
+ aContext->SetStyle(eStyleStruct_Visibility, vis);
+ return vis;
+ }
+ case eStyleStruct_Text:
+ {
+ nsStyleText* text = new (mPresContext) nsStyleText(mPresContext);
+ aContext->SetStyle(eStyleStruct_Text, text);
+ return text;
+ }
+ case eStyleStruct_TextReset:
+ {
+ nsStyleTextReset* text = new (mPresContext) nsStyleTextReset(mPresContext);
+ aContext->SetStyle(eStyleStruct_TextReset, text);
+ return text;
+ }
+ case eStyleStruct_Color:
+ {
+ nsStyleColor* color = new (mPresContext) nsStyleColor(mPresContext);
+ aContext->SetStyle(eStyleStruct_Color, color);
+ return color;
+ }
+ case eStyleStruct_Background:
+ {
+ nsStyleBackground* bg = new (mPresContext) nsStyleBackground(mPresContext);
+ aContext->SetStyle(eStyleStruct_Background, bg);
+ return bg;
+ }
+ case eStyleStruct_Margin:
+ {
+ nsStyleMargin* margin = new (mPresContext) nsStyleMargin(mPresContext);
+ aContext->SetStyle(eStyleStruct_Margin, margin);
+ return margin;
+ }
+ case eStyleStruct_Border:
+ {
+ nsStyleBorder* border = new (mPresContext) nsStyleBorder(mPresContext);
+ aContext->SetStyle(eStyleStruct_Border, border);
+ return border;
+ }
+ case eStyleStruct_Padding:
+ {
+ nsStylePadding* padding = new (mPresContext) nsStylePadding(mPresContext);
+ aContext->SetStyle(eStyleStruct_Padding, padding);
+ return padding;
+ }
+ case eStyleStruct_Outline:
+ {
+ nsStyleOutline* outline = new (mPresContext) nsStyleOutline(mPresContext);
+ aContext->SetStyle(eStyleStruct_Outline, outline);
+ return outline;
+ }
+ case eStyleStruct_List:
+ {
+ nsStyleList* list = new (mPresContext) nsStyleList(mPresContext);
+ aContext->SetStyle(eStyleStruct_List, list);
+ return list;
+ }
+ case eStyleStruct_Position:
+ {
+ nsStylePosition* pos = new (mPresContext) nsStylePosition(mPresContext);
+ aContext->SetStyle(eStyleStruct_Position, pos);
+ return pos;
+ }
+ case eStyleStruct_Table:
+ {
+ nsStyleTable* table = new (mPresContext) nsStyleTable(mPresContext);
+ aContext->SetStyle(eStyleStruct_Table, table);
+ return table;
+ }
+ case eStyleStruct_TableBorder:
+ {
+ nsStyleTableBorder* table = new (mPresContext) nsStyleTableBorder(mPresContext);
+ aContext->SetStyle(eStyleStruct_TableBorder, table);
+ return table;
+ }
+ case eStyleStruct_Content:
+ {
+ nsStyleContent* content = new (mPresContext) nsStyleContent(mPresContext);
+ aContext->SetStyle(eStyleStruct_Content, content);
+ return content;
+ }
+ case eStyleStruct_UserInterface:
+ {
+ nsStyleUserInterface* ui = new (mPresContext) nsStyleUserInterface(mPresContext);
+ aContext->SetStyle(eStyleStruct_UserInterface, ui);
+ return ui;
+ }
+ case eStyleStruct_UIReset:
+ {
+ nsStyleUIReset* ui = new (mPresContext) nsStyleUIReset(mPresContext);
+ aContext->SetStyle(eStyleStruct_UIReset, ui);
+ return ui;
+ }
+ case eStyleStruct_XUL:
+ {
+ nsStyleXUL* xul = new (mPresContext) nsStyleXUL(mPresContext);
+ aContext->SetStyle(eStyleStruct_XUL, xul);
+ return xul;
+ }
+ case eStyleStruct_Column:
+ {
+ nsStyleColumn* column = new (mPresContext) nsStyleColumn(mPresContext);
+ aContext->SetStyle(eStyleStruct_Column, column);
+ return column;
+ }
+ case eStyleStruct_SVG:
+ {
+ nsStyleSVG* svg = new (mPresContext) nsStyleSVG(mPresContext);
+ aContext->SetStyle(eStyleStruct_SVG, svg);
+ return svg;
+ }
+ case eStyleStruct_SVGReset:
+ {
+ nsStyleSVGReset* svgReset = new (mPresContext) nsStyleSVGReset(mPresContext);
+ aContext->SetStyle(eStyleStruct_SVGReset, svgReset);
+ return svgReset;
+ }
+ case eStyleStruct_Variables:
+ {
+ nsStyleVariables* vars = new (mPresContext) nsStyleVariables(mPresContext);
+ aContext->SetStyle(eStyleStruct_Variables, vars);
+ return vars;
+ }
+ case eStyleStruct_Effects:
+ {
+ nsStyleEffects* effects = new (mPresContext) nsStyleEffects(mPresContext);
+ aContext->SetStyle(eStyleStruct_Effects, effects);
+ return effects;
+ }
+ default:
+ /*
+ * unhandled case: nsStyleStructID_Length.
+ * last item of nsStyleStructID, to know its length.
+ */
+ MOZ_ASSERT(false, "unexpected SID");
+ return nullptr;
+ }
+ return nullptr;
+}
+
+/**
+ * Begin an nsRuleNode::Compute*Data function for an inherited struct.
+ *
+ * @param type_ The nsStyle* type this function computes.
+ * @param data_ Variable (declared here) holding the result of this
+ * function.
+ * @param parentdata_ Variable (declared here) holding the parent style
+ * context's data for this struct.
+ */
+#define COMPUTE_START_INHERITED(type_, data_, parentdata_) \
+ NS_ASSERTION(aRuleDetail != eRuleFullInherited, \
+ "should not have bothered calling Compute*Data"); \
+ \
+ nsStyleContext* parentContext = aContext->GetParent(); \
+ \
+ nsStyle##type_* data_ = nullptr; \
+ mozilla::Maybe<nsStyle##type_> maybeFakeParentData; \
+ const nsStyle##type_* parentdata_ = nullptr; \
+ RuleNodeCacheConditions conditions = aConditions; \
+ \
+ /* If |conditions.Cacheable()| might be true by the time we're done, we */ \
+ /* can't call parentContext->Style##type_() since it could recur into */ \
+ /* setting the same struct on the same rule node, causing a leak. */ \
+ if (aRuleDetail != eRuleFullReset && \
+ (!aStartStruct || (aRuleDetail != eRulePartialReset && \
+ aRuleDetail != eRuleNone))) { \
+ if (parentContext) { \
+ parentdata_ = parentContext->Style##type_(); \
+ } else { \
+ maybeFakeParentData.emplace(mPresContext); \
+ parentdata_ = maybeFakeParentData.ptr(); \
+ } \
+ } \
+ if (eStyleStruct_##type_ == eStyleStruct_Variables) \
+ /* no need to copy construct an nsStyleVariables, as we will copy */ \
+ /* inherited variables (and call SetUncacheable()) in */ \
+ /* ComputeVariablesData */ \
+ data_ = new (mPresContext) nsStyle##type_(mPresContext); \
+ else if (aStartStruct) \
+ /* We only need to compute the delta between this computed data and */ \
+ /* our computed data. */ \
+ data_ = new (mPresContext) \
+ nsStyle##type_(*static_cast<nsStyle##type_*>(aStartStruct)); \
+ else { \
+ if (aRuleDetail != eRuleFullMixed && aRuleDetail != eRuleFullReset) { \
+ /* No question. We will have to inherit. Go ahead and init */ \
+ /* with inherited vals from parent. */ \
+ conditions.SetUncacheable(); \
+ if (parentdata_) \
+ data_ = new (mPresContext) nsStyle##type_(*parentdata_); \
+ else \
+ data_ = new (mPresContext) nsStyle##type_(mPresContext); \
+ } \
+ else \
+ data_ = new (mPresContext) nsStyle##type_(mPresContext); \
+ } \
+ \
+ if (!parentdata_) \
+ parentdata_ = data_;
+
+/**
+ * Begin an nsRuleNode::Compute*Data function for a reset struct.
+ *
+ * @param type_ The nsStyle* type this function computes.
+ * @param data_ Variable (declared here) holding the result of this
+ * function.
+ * @param parentdata_ Variable (declared here) holding the parent style
+ * context's data for this struct.
+ */
+#define COMPUTE_START_RESET(type_, data_, parentdata_) \
+ NS_ASSERTION(aRuleDetail != eRuleFullInherited, \
+ "should not have bothered calling Compute*Data"); \
+ \
+ nsStyleContext* parentContext = aContext->GetParent(); \
+ /* Reset structs don't inherit from first-line */ \
+ /* See similar code in WalkRuleTree */ \
+ while (parentContext && \
+ parentContext->GetPseudo() == nsCSSPseudoElements::firstLine) { \
+ parentContext = parentContext->GetParent(); \
+ } \
+ \
+ nsStyle##type_* data_; \
+ if (aStartStruct) \
+ /* We only need to compute the delta between this computed data and */ \
+ /* our computed data. */ \
+ data_ = new (mPresContext) \
+ nsStyle##type_(*static_cast<nsStyle##type_*>(aStartStruct)); \
+ else \
+ data_ = new (mPresContext) nsStyle##type_(mPresContext); \
+ \
+ /* If |conditions.Cacheable()| might be true by the time we're done, we */ \
+ /* can't call parentContext->Style##type_() since it could recur into */ \
+ /* setting the same struct on the same rule node, causing a leak. */ \
+ mozilla::Maybe<nsStyle##type_> maybeFakeParentData; \
+ const nsStyle##type_* parentdata_ = data_; \
+ if (aRuleDetail != eRuleFullReset && \
+ aRuleDetail != eRulePartialReset && \
+ aRuleDetail != eRuleNone) { \
+ if (parentContext) { \
+ parentdata_ = parentContext->Style##type_(); \
+ } else { \
+ maybeFakeParentData.emplace(mPresContext); \
+ parentdata_ = maybeFakeParentData.ptr(); \
+ } \
+ } \
+ RuleNodeCacheConditions conditions = aConditions;
+
+/**
+ * End an nsRuleNode::Compute*Data function for an inherited struct.
+ *
+ * @param type_ The nsStyle* type this function computes.
+ * @param data_ Variable holding the result of this function.
+ */
+#define COMPUTE_END_INHERITED(type_, data_) \
+ NS_POSTCONDITION(!conditions.CacheableWithoutDependencies() || \
+ aRuleDetail == eRuleFullReset || \
+ (aStartStruct && aRuleDetail == eRulePartialReset), \
+ "conditions.CacheableWithoutDependencies() must be false " \
+ "for inherited structs unless all properties have been " \
+ "specified with values other than inherit"); \
+ if (conditions.CacheableWithoutDependencies()) { \
+ /* We were fully specified and can therefore be cached right on the */ \
+ /* rule node. */ \
+ if (!aHighestNode->mStyleData.mInheritedData) { \
+ aHighestNode->mStyleData.mInheritedData = \
+ new (mPresContext) nsInheritedStyleData; \
+ } \
+ NS_ASSERTION(!aHighestNode->mStyleData.mInheritedData-> \
+ mStyleStructs[eStyleStruct_##type_], \
+ "Going to leak style data"); \
+ aHighestNode->mStyleData.mInheritedData-> \
+ mStyleStructs[eStyleStruct_##type_] = data_; \
+ /* Propagate the bit down. */ \
+ PropagateDependentBit(eStyleStruct_##type_, aHighestNode, data_); \
+ /* Tell the style context that it doesn't own the data */ \
+ aContext->AddStyleBit(NS_STYLE_INHERIT_BIT(type_)); \
+ } \
+ /* For inherited structs, our caller will cache the data on the */ \
+ /* style context */ \
+ \
+ return data_;
+
+/**
+ * End an nsRuleNode::Compute*Data function for a reset struct.
+ *
+ * @param type_ The nsStyle* type this function computes.
+ * @param data_ Variable holding the result of this function.
+ */
+#define COMPUTE_END_RESET(type_, data_) \
+ NS_POSTCONDITION(!conditions.CacheableWithoutDependencies() || \
+ aRuleDetail == eRuleNone || \
+ aRuleDetail == eRulePartialReset || \
+ aRuleDetail == eRuleFullReset, \
+ "conditions.CacheableWithoutDependencies() must be false " \
+ "for reset structs if any properties were specified as " \
+ "inherit"); \
+ if (conditions.CacheableWithoutDependencies()) { \
+ /* We were fully specified and can therefore be cached right on the */ \
+ /* rule node. */ \
+ if (!aHighestNode->mStyleData.mResetData) { \
+ aHighestNode->mStyleData.mResetData = \
+ new (mPresContext) nsConditionalResetStyleData; \
+ } \
+ NS_ASSERTION(!aHighestNode->mStyleData.mResetData-> \
+ GetStyleData(eStyleStruct_##type_), \
+ "Going to leak style data"); \
+ aHighestNode->mStyleData.mResetData-> \
+ SetStyleData(eStyleStruct_##type_, data_); \
+ /* Propagate the bit down. */ \
+ PropagateDependentBit(eStyleStruct_##type_, aHighestNode, data_); \
+ if (HasAnimationData()) { \
+ /* If we have animation data, the struct should be cached on the */ \
+ /* style context so that we can peek the struct. */ \
+ /* See comment in AnimValuesStyleRule::MapRuleInfoInto. */ \
+ StoreStyleOnContext(aContext, eStyleStruct_##type_, data_); \
+ } \
+ } else if (conditions.Cacheable()) { \
+ if (!mStyleData.mResetData) { \
+ mStyleData.mResetData = new (mPresContext) nsConditionalResetStyleData; \
+ } \
+ mStyleData.mResetData-> \
+ SetStyleData(eStyleStruct_##type_, mPresContext, data_, conditions); \
+ /* Tell the style context that it doesn't own the data */ \
+ aContext->AddStyleBit(NS_STYLE_INHERIT_BIT(type_)); \
+ aContext->SetStyle(eStyleStruct_##type_, data_); \
+ } else { \
+ /* We can't be cached in the rule node. We have to be put right */ \
+ /* on the style context. */ \
+ aContext->SetStyle(eStyleStruct_##type_, data_); \
+ if (aContext->GetParent()) { \
+ /* This is pessimistic; we could be uncacheable because we had a */ \
+ /* relative font-weight, for example, which does not need to defeat */ \
+ /* the restyle optimizations in RestyleManager.cpp that look at */ \
+ /* NS_STYLE_HAS_CHILD_THAT_USES_RESET_STYLE. */ \
+ aContext->GetParent()-> \
+ AddStyleBit(NS_STYLE_HAS_CHILD_THAT_USES_RESET_STYLE); \
+ } \
+ } \
+ \
+ return data_;
+
+// This function figures out how much scaling should be suppressed to
+// satisfy scriptminsize. This is our attempt to implement
+// http://www.w3.org/TR/MathML2/chapter3.html#id.3.3.4.2.2
+// This is called after mScriptLevel, mScriptMinSize and mScriptSizeMultiplier
+// have been set in aFont.
+//
+// Here are the invariants we enforce:
+// 1) A decrease in size must not reduce the size below minscriptsize.
+// 2) An increase in size must not increase the size above the size we would
+// have if minscriptsize had not been applied anywhere.
+// 3) The scriptlevel-induced size change must between 1.0 and the parent's
+// scriptsizemultiplier^(new script level - old script level), as close to the
+// latter as possible subject to constraints 1 and 2.
+static nscoord
+ComputeScriptLevelSize(const nsStyleFont* aFont, const nsStyleFont* aParentFont,
+ nsPresContext* aPresContext, nscoord* aUnconstrainedSize)
+{
+ int32_t scriptLevelChange =
+ aFont->mScriptLevel - aParentFont->mScriptLevel;
+ if (scriptLevelChange == 0) {
+ *aUnconstrainedSize = aParentFont->mScriptUnconstrainedSize;
+ // Constraint #3 says that we cannot change size, and #1 and #2 are always
+ // satisfied with no change. It's important this be fast because it covers
+ // all non-MathML content.
+ return aParentFont->mSize;
+ }
+
+ // Compute actual value of minScriptSize
+ nscoord minScriptSize = aParentFont->mScriptMinSize;
+ if (aFont->mAllowZoom) {
+ minScriptSize = nsStyleFont::ZoomText(aPresContext, minScriptSize);
+ }
+
+ double scriptLevelScale =
+ pow(aParentFont->mScriptSizeMultiplier, scriptLevelChange);
+ // Compute the size we would have had if minscriptsize had never been
+ // applied, also prevent overflow (bug 413274)
+ *aUnconstrainedSize =
+ NSToCoordRoundWithClamp(aParentFont->mScriptUnconstrainedSize*scriptLevelScale);
+ // Compute the size we could get via scriptlevel change
+ nscoord scriptLevelSize =
+ NSToCoordRoundWithClamp(aParentFont->mSize*scriptLevelScale);
+ if (scriptLevelScale <= 1.0) {
+ if (aParentFont->mSize <= minScriptSize) {
+ // We can't decrease the font size at all, so just stick to no change
+ // (authors are allowed to explicitly set the font size smaller than
+ // minscriptsize)
+ return aParentFont->mSize;
+ }
+ // We can decrease, so apply constraint #1
+ return std::max(minScriptSize, scriptLevelSize);
+ } else {
+ // scriptminsize can only make sizes larger than the unconstrained size
+ NS_ASSERTION(*aUnconstrainedSize <= scriptLevelSize, "How can this ever happen?");
+ // Apply constraint #2
+ return std::min(scriptLevelSize, std::max(*aUnconstrainedSize, minScriptSize));
+ }
+}
+
+
+/* static */ nscoord
+nsRuleNode::CalcFontPointSize(int32_t aHTMLSize, int32_t aBasePointSize,
+ nsPresContext* aPresContext,
+ nsFontSizeType aFontSizeType)
+{
+#define sFontSizeTableMin 9
+#define sFontSizeTableMax 16
+
+// This table seems to be the one used by MacIE5. We hope its adoption in Mozilla
+// and eventually in WinIE5.5 will help to establish a standard rendering across
+// platforms and browsers. For now, it is used only in Strict mode. More can be read
+// in the document written by Todd Farhner at:
+// http://style.verso.com/font_size_intervals/altintervals.html
+//
+ static int32_t sStrictFontSizeTable[sFontSizeTableMax - sFontSizeTableMin + 1][8] =
+ {
+ { 9, 9, 9, 9, 11, 14, 18, 27},
+ { 9, 9, 9, 10, 12, 15, 20, 30},
+ { 9, 9, 10, 11, 13, 17, 22, 33},
+ { 9, 9, 10, 12, 14, 18, 24, 36},
+ { 9, 10, 12, 13, 16, 20, 26, 39},
+ { 9, 10, 12, 14, 17, 21, 28, 42},
+ { 9, 10, 13, 15, 18, 23, 30, 45},
+ { 9, 10, 13, 16, 18, 24, 32, 48}
+ };
+// HTML 1 2 3 4 5 6 7
+// CSS xxs xs s m l xl xxl
+// |
+// user pref
+//
+//------------------------------------------------------------
+//
+// This table gives us compatibility with WinNav4 for the default fonts only.
+// In WinNav4, the default fonts were:
+//
+// Times/12pt == Times/16px at 96ppi
+// Courier/10pt == Courier/13px at 96ppi
+//
+// The 2 lines below marked "anchored" have the exact pixel sizes used by
+// WinNav4 for Times/12pt and Courier/10pt at 96ppi. As you can see, the
+// HTML size 3 (user pref) for those 2 anchored lines is 13px and 16px.
+//
+// All values other than the anchored values were filled in by hand, never
+// going below 9px, and maintaining a "diagonal" relationship. See for
+// example the 13s -- they follow a diagonal line through the table.
+//
+ static int32_t sQuirksFontSizeTable[sFontSizeTableMax - sFontSizeTableMin + 1][8] =
+ {
+ { 9, 9, 9, 9, 11, 14, 18, 28 },
+ { 9, 9, 9, 10, 12, 15, 20, 31 },
+ { 9, 9, 9, 11, 13, 17, 22, 34 },
+ { 9, 9, 10, 12, 14, 18, 24, 37 },
+ { 9, 9, 10, 13, 16, 20, 26, 40 }, // anchored (13)
+ { 9, 9, 11, 14, 17, 21, 28, 42 },
+ { 9, 10, 12, 15, 17, 23, 30, 45 },
+ { 9, 10, 13, 16, 18, 24, 32, 48 } // anchored (16)
+ };
+// HTML 1 2 3 4 5 6 7
+// CSS xxs xs s m l xl xxl
+// |
+// user pref
+
+#if 0
+//
+// These are the exact pixel values used by WinIE5 at 96ppi.
+//
+ { ?, 8, 11, 12, 13, 16, 21, 32 }, // smallest
+ { ?, 9, 12, 13, 16, 21, 27, 40 }, // smaller
+ { ?, 10, 13, 16, 18, 24, 32, 48 }, // medium
+ { ?, 13, 16, 19, 21, 27, 37, ?? }, // larger
+ { ?, 16, 19, 21, 24, 32, 43, ?? } // largest
+//
+// HTML 1 2 3 4 5 6 7
+// CSS ? ? ? ? ? ? ? ?
+//
+// (CSS not tested yet.)
+//
+#endif
+
+ static int32_t sFontSizeFactors[8] = { 60,75,89,100,120,150,200,300 };
+
+ static int32_t sCSSColumns[7] = {0, 1, 2, 3, 4, 5, 6}; // xxs...xxl
+ static int32_t sHTMLColumns[7] = {1, 2, 3, 4, 5, 6, 7}; // 1...7
+
+ double dFontSize;
+
+ if (aFontSizeType == eFontSize_HTML) {
+ aHTMLSize--; // input as 1-7
+ }
+
+ if (aHTMLSize < 0)
+ aHTMLSize = 0;
+ else if (aHTMLSize > 6)
+ aHTMLSize = 6;
+
+ int32_t* column;
+ switch (aFontSizeType)
+ {
+ case eFontSize_HTML: column = sHTMLColumns; break;
+ case eFontSize_CSS: column = sCSSColumns; break;
+ }
+
+ // Make special call specifically for fonts (needed PrintPreview)
+ int32_t fontSize = nsPresContext::AppUnitsToIntCSSPixels(aBasePointSize);
+
+ if ((fontSize >= sFontSizeTableMin) && (fontSize <= sFontSizeTableMax))
+ {
+ int32_t row = fontSize - sFontSizeTableMin;
+
+ if (aPresContext->CompatibilityMode() == eCompatibility_NavQuirks) {
+ dFontSize = nsPresContext::CSSPixelsToAppUnits(sQuirksFontSizeTable[row][column[aHTMLSize]]);
+ } else {
+ dFontSize = nsPresContext::CSSPixelsToAppUnits(sStrictFontSizeTable[row][column[aHTMLSize]]);
+ }
+ }
+ else
+ {
+ int32_t factor = sFontSizeFactors[column[aHTMLSize]];
+ dFontSize = (factor * aBasePointSize) / 100;
+ }
+
+
+ if (1.0 < dFontSize) {
+ return (nscoord)dFontSize;
+ }
+ return (nscoord)1;
+}
+
+
+//------------------------------------------------------------------------------
+//
+//------------------------------------------------------------------------------
+
+/* static */ nscoord
+nsRuleNode::FindNextSmallerFontSize(nscoord aFontSize, int32_t aBasePointSize,
+ nsPresContext* aPresContext,
+ nsFontSizeType aFontSizeType)
+{
+ int32_t index;
+ int32_t indexMin;
+ int32_t indexMax;
+ float relativePosition;
+ nscoord smallerSize;
+ nscoord indexFontSize = aFontSize; // XXX initialize to quell a spurious gcc3.2 warning
+ nscoord smallestIndexFontSize;
+ nscoord largestIndexFontSize;
+ nscoord smallerIndexFontSize;
+ nscoord largerIndexFontSize;
+
+ nscoord onePx = nsPresContext::CSSPixelsToAppUnits(1);
+
+ if (aFontSizeType == eFontSize_HTML) {
+ indexMin = 1;
+ indexMax = 7;
+ } else {
+ indexMin = 0;
+ indexMax = 6;
+ }
+
+ smallestIndexFontSize = CalcFontPointSize(indexMin, aBasePointSize, aPresContext, aFontSizeType);
+ largestIndexFontSize = CalcFontPointSize(indexMax, aBasePointSize, aPresContext, aFontSizeType);
+ if (aFontSize > smallestIndexFontSize) {
+ if (aFontSize < NSToCoordRound(float(largestIndexFontSize) * 1.5)) { // smaller will be in HTML table
+ // find largest index smaller than current
+ for (index = indexMax; index >= indexMin; index--) {
+ indexFontSize = CalcFontPointSize(index, aBasePointSize, aPresContext, aFontSizeType);
+ if (indexFontSize < aFontSize)
+ break;
+ }
+ // set up points beyond table for interpolation purposes
+ if (indexFontSize == smallestIndexFontSize) {
+ smallerIndexFontSize = indexFontSize - onePx;
+ largerIndexFontSize = CalcFontPointSize(index+1, aBasePointSize, aPresContext, aFontSizeType);
+ } else if (indexFontSize == largestIndexFontSize) {
+ smallerIndexFontSize = CalcFontPointSize(index-1, aBasePointSize, aPresContext, aFontSizeType);
+ largerIndexFontSize = NSToCoordRound(float(largestIndexFontSize) * 1.5);
+ } else {
+ smallerIndexFontSize = CalcFontPointSize(index-1, aBasePointSize, aPresContext, aFontSizeType);
+ largerIndexFontSize = CalcFontPointSize(index+1, aBasePointSize, aPresContext, aFontSizeType);
+ }
+ // compute the relative position of the parent size between the two closest indexed sizes
+ relativePosition = float(aFontSize - indexFontSize) / float(largerIndexFontSize - indexFontSize);
+ // set the new size to have the same relative position between the next smallest two indexed sizes
+ smallerSize = smallerIndexFontSize + NSToCoordRound(relativePosition * (indexFontSize - smallerIndexFontSize));
+ }
+ else { // larger than HTML table, drop by 33%
+ smallerSize = NSToCoordRound(float(aFontSize) / 1.5);
+ }
+ }
+ else { // smaller than HTML table, drop by 1px
+ smallerSize = std::max(aFontSize - onePx, onePx);
+ }
+ return smallerSize;
+}
+
+//------------------------------------------------------------------------------
+//
+//------------------------------------------------------------------------------
+
+/* static */ nscoord
+nsRuleNode::FindNextLargerFontSize(nscoord aFontSize, int32_t aBasePointSize,
+ nsPresContext* aPresContext,
+ nsFontSizeType aFontSizeType)
+{
+ int32_t index;
+ int32_t indexMin;
+ int32_t indexMax;
+ float relativePosition;
+ nscoord adjustment;
+ nscoord largerSize;
+ nscoord indexFontSize = aFontSize; // XXX initialize to quell a spurious gcc3.2 warning
+ nscoord smallestIndexFontSize;
+ nscoord largestIndexFontSize;
+ nscoord smallerIndexFontSize;
+ nscoord largerIndexFontSize;
+
+ nscoord onePx = nsPresContext::CSSPixelsToAppUnits(1);
+
+ if (aFontSizeType == eFontSize_HTML) {
+ indexMin = 1;
+ indexMax = 7;
+ } else {
+ indexMin = 0;
+ indexMax = 6;
+ }
+
+ smallestIndexFontSize = CalcFontPointSize(indexMin, aBasePointSize, aPresContext, aFontSizeType);
+ largestIndexFontSize = CalcFontPointSize(indexMax, aBasePointSize, aPresContext, aFontSizeType);
+ if (aFontSize > (smallestIndexFontSize - onePx)) {
+ if (aFontSize < largestIndexFontSize) { // larger will be in HTML table
+ // find smallest index larger than current
+ for (index = indexMin; index <= indexMax; index++) {
+ indexFontSize = CalcFontPointSize(index, aBasePointSize, aPresContext, aFontSizeType);
+ if (indexFontSize > aFontSize)
+ break;
+ }
+ // set up points beyond table for interpolation purposes
+ if (indexFontSize == smallestIndexFontSize) {
+ smallerIndexFontSize = indexFontSize - onePx;
+ largerIndexFontSize = CalcFontPointSize(index+1, aBasePointSize, aPresContext, aFontSizeType);
+ } else if (indexFontSize == largestIndexFontSize) {
+ smallerIndexFontSize = CalcFontPointSize(index-1, aBasePointSize, aPresContext, aFontSizeType);
+ largerIndexFontSize = NSCoordSaturatingMultiply(largestIndexFontSize, 1.5);
+ } else {
+ smallerIndexFontSize = CalcFontPointSize(index-1, aBasePointSize, aPresContext, aFontSizeType);
+ largerIndexFontSize = CalcFontPointSize(index+1, aBasePointSize, aPresContext, aFontSizeType);
+ }
+ // compute the relative position of the parent size between the two closest indexed sizes
+ relativePosition = float(aFontSize - smallerIndexFontSize) / float(indexFontSize - smallerIndexFontSize);
+ // set the new size to have the same relative position between the next largest two indexed sizes
+ adjustment = NSCoordSaturatingNonnegativeMultiply(largerIndexFontSize - indexFontSize, relativePosition);
+ largerSize = NSCoordSaturatingAdd(indexFontSize, adjustment);
+ }
+ else { // larger than HTML table, increase by 50%
+ largerSize = NSCoordSaturatingMultiply(aFontSize, 1.5);
+ }
+ }
+ else { // smaller than HTML table, increase by 1px
+ largerSize = NSCoordSaturatingAdd(aFontSize, onePx);
+ }
+ return largerSize;
+}
+
+struct SetFontSizeCalcOps : public css::BasicCoordCalcOps,
+ public css::NumbersAlreadyNormalizedOps
+{
+ // The parameters beyond aValue that we need for CalcLengthWith.
+ const nscoord mParentSize;
+ const nsStyleFont* const mParentFont;
+ nsPresContext* const mPresContext;
+ nsStyleContext* const mStyleContext;
+ const bool mAtRoot;
+ RuleNodeCacheConditions& mConditions;
+
+ SetFontSizeCalcOps(nscoord aParentSize, const nsStyleFont* aParentFont,
+ nsPresContext* aPresContext,
+ nsStyleContext* aStyleContext,
+ bool aAtRoot,
+ RuleNodeCacheConditions& aConditions)
+ : mParentSize(aParentSize),
+ mParentFont(aParentFont),
+ mPresContext(aPresContext),
+ mStyleContext(aStyleContext),
+ mAtRoot(aAtRoot),
+ mConditions(aConditions)
+ {
+ }
+
+ result_type ComputeLeafValue(const nsCSSValue& aValue)
+ {
+ nscoord size;
+ if (aValue.IsLengthUnit()) {
+ // Note that font-based length units use the parent's size
+ // unadjusted for scriptlevel changes. A scriptlevel change
+ // between us and the parent is simply ignored.
+ size = CalcLengthWith(aValue, mParentSize,
+ mParentFont,
+ mStyleContext, mPresContext, mAtRoot,
+ true, mConditions);
+ if (!aValue.IsRelativeLengthUnit() && mParentFont->mAllowZoom) {
+ size = nsStyleFont::ZoomText(mPresContext, size);
+ }
+ }
+ else if (eCSSUnit_Percent == aValue.GetUnit()) {
+ mConditions.SetUncacheable();
+ // Note that % units use the parent's size unadjusted for scriptlevel
+ // changes. A scriptlevel change between us and the parent is simply
+ // ignored.
+ // aValue.GetPercentValue() may be negative for, e.g., calc(-50%)
+ size = NSCoordSaturatingMultiply(mParentSize, aValue.GetPercentValue());
+ } else {
+ MOZ_ASSERT(false, "unexpected value");
+ size = mParentSize;
+ }
+
+ return size;
+ }
+};
+
+/* static */ void
+nsRuleNode::SetFontSize(nsPresContext* aPresContext,
+ nsStyleContext* aContext,
+ const nsRuleData* aRuleData,
+ const nsStyleFont* aFont,
+ const nsStyleFont* aParentFont,
+ nscoord* aSize,
+ const nsFont& aSystemFont,
+ nscoord aParentSize,
+ nscoord aScriptLevelAdjustedParentSize,
+ bool aUsedStartStruct,
+ bool aAtRoot,
+ RuleNodeCacheConditions& aConditions)
+{
+ // If false, means that *aSize has not been zoomed. If true, means that
+ // *aSize has been zoomed iff aParentFont->mAllowZoom is true.
+ bool sizeIsZoomedAccordingToParent = false;
+
+ int32_t baseSize = (int32_t) aPresContext->
+ GetDefaultFont(aFont->mGenericID, aFont->mLanguage)->size;
+ const nsCSSValue* sizeValue = aRuleData->ValueForFontSize();
+ if (eCSSUnit_Enumerated == sizeValue->GetUnit()) {
+ int32_t value = sizeValue->GetIntValue();
+
+ if ((NS_STYLE_FONT_SIZE_XXSMALL <= value) &&
+ (value <= NS_STYLE_FONT_SIZE_XXLARGE)) {
+ *aSize = CalcFontPointSize(value, baseSize,
+ aPresContext, eFontSize_CSS);
+ }
+ else if (NS_STYLE_FONT_SIZE_XXXLARGE == value) {
+ // <font size="7"> is not specified in CSS, so we don't use eFontSize_CSS.
+ *aSize = CalcFontPointSize(value, baseSize, aPresContext);
+ }
+ else if (NS_STYLE_FONT_SIZE_LARGER == value ||
+ NS_STYLE_FONT_SIZE_SMALLER == value) {
+ aConditions.SetUncacheable();
+
+ // Un-zoom so we use the tables correctly. We'll then rezoom due
+ // to the |zoom = true| above.
+ // Note that relative units here use the parent's size unadjusted
+ // for scriptlevel changes. A scriptlevel change between us and the parent
+ // is simply ignored.
+ nscoord parentSize = aParentSize;
+ if (aParentFont->mAllowZoom) {
+ parentSize = nsStyleFont::UnZoomText(aPresContext, parentSize);
+ }
+
+ if (NS_STYLE_FONT_SIZE_LARGER == value) {
+ *aSize = FindNextLargerFontSize(parentSize,
+ baseSize, aPresContext, eFontSize_CSS);
+
+ NS_ASSERTION(*aSize >= parentSize,
+ "FindNextLargerFontSize failed");
+ }
+ else {
+ *aSize = FindNextSmallerFontSize(parentSize,
+ baseSize, aPresContext, eFontSize_CSS);
+ NS_ASSERTION(*aSize < parentSize ||
+ parentSize <= nsPresContext::CSSPixelsToAppUnits(1),
+ "FindNextSmallerFontSize failed");
+ }
+ } else {
+ NS_NOTREACHED("unexpected value");
+ }
+ }
+ else if (sizeValue->IsLengthUnit() ||
+ sizeValue->GetUnit() == eCSSUnit_Percent ||
+ sizeValue->IsCalcUnit()) {
+ SetFontSizeCalcOps ops(aParentSize, aParentFont,
+ aPresContext, aContext,
+ aAtRoot,
+ aConditions);
+ *aSize = css::ComputeCalc(*sizeValue, ops);
+ if (*aSize < 0) {
+ MOZ_ASSERT(sizeValue->IsCalcUnit(),
+ "negative lengths and percents should be rejected by parser");
+ *aSize = 0;
+ }
+ // The calc ops will always zoom its result according to the value
+ // of aParentFont->mAllowZoom.
+ sizeIsZoomedAccordingToParent = true;
+ }
+ else if (eCSSUnit_System_Font == sizeValue->GetUnit()) {
+ // this becomes our cascading size
+ *aSize = aSystemFont.size;
+ }
+ else if (eCSSUnit_Inherit == sizeValue->GetUnit() ||
+ eCSSUnit_Unset == sizeValue->GetUnit()) {
+ aConditions.SetUncacheable();
+ // We apply scriptlevel change for this case, because the default is
+ // to inherit and we don't want explicit "inherit" to differ from the
+ // default.
+ *aSize = aScriptLevelAdjustedParentSize;
+ sizeIsZoomedAccordingToParent = true;
+ }
+ else if (eCSSUnit_Initial == sizeValue->GetUnit()) {
+ // The initial value is 'medium', which has magical sizing based on
+ // the generic font family, so do that here too.
+ *aSize = baseSize;
+ } else {
+ NS_ASSERTION(eCSSUnit_Null == sizeValue->GetUnit(),
+ "What kind of font-size value is this?");
+ // if aUsedStartStruct is true, then every single property in the
+ // font struct is being set all at once. This means scriptlevel is not
+ // going to have any influence on the font size; there is no need to
+ // do anything here.
+ if (!aUsedStartStruct && aParentSize != aScriptLevelAdjustedParentSize) {
+ // There was no rule affecting the size but the size has been
+ // affected by the parent's size via scriptlevel change. So we cannot
+ // store the data in the rule tree.
+ aConditions.SetUncacheable();
+ *aSize = aScriptLevelAdjustedParentSize;
+ sizeIsZoomedAccordingToParent = true;
+ } else {
+ return;
+ }
+ }
+
+ // We want to zoom the cascaded size so that em-based measurements,
+ // line-heights, etc., work.
+ bool currentlyZoomed = sizeIsZoomedAccordingToParent &&
+ aParentFont->mAllowZoom;
+ if (!currentlyZoomed && aFont->mAllowZoom) {
+ *aSize = nsStyleFont::ZoomText(aPresContext, *aSize);
+ } else if (currentlyZoomed && !aFont->mAllowZoom) {
+ *aSize = nsStyleFont::UnZoomText(aPresContext, *aSize);
+ }
+}
+
+static int8_t ClampTo8Bit(int32_t aValue) {
+ if (aValue < -128)
+ return -128;
+ if (aValue > 127)
+ return 127;
+ return int8_t(aValue);
+}
+
+/* static */ void
+nsRuleNode::SetFont(nsPresContext* aPresContext, nsStyleContext* aContext,
+ uint8_t aGenericFontID, const nsRuleData* aRuleData,
+ const nsStyleFont* aParentFont,
+ nsStyleFont* aFont, bool aUsedStartStruct,
+ RuleNodeCacheConditions& aConditions)
+{
+ bool atRoot = !aContext->GetParent();
+
+ // -x-text-zoom: none, inherit, initial
+ bool allowZoom;
+ const nsCSSValue* textZoomValue = aRuleData->ValueForTextZoom();
+ if (eCSSUnit_Null != textZoomValue->GetUnit()) {
+ if (eCSSUnit_Inherit == textZoomValue->GetUnit()) {
+ allowZoom = aParentFont->mAllowZoom;
+ } else if (eCSSUnit_None == textZoomValue->GetUnit()) {
+ allowZoom = false;
+ } else {
+ MOZ_ASSERT(eCSSUnit_Initial == textZoomValue->GetUnit(),
+ "unexpected unit");
+ allowZoom = true;
+ }
+ aFont->EnableZoom(aPresContext, allowZoom);
+ }
+
+ // mLanguage must be set before before any of the CalcLengthWith calls
+ // (direct calls or calls via SetFontSize) for the cases where |aParentFont|
+ // is the same as |aFont|.
+ //
+ // -x-lang: string, inherit
+ // This is not a real CSS property, it is an HTML attribute mapped to CSS.
+ const nsCSSValue* langValue = aRuleData->ValueForLang();
+ if (eCSSUnit_Ident == langValue->GetUnit()) {
+ nsAutoString lang;
+ langValue->GetStringValue(lang);
+
+ nsContentUtils::ASCIIToLower(lang);
+ aFont->mLanguage = NS_Atomize(lang);
+ aFont->mExplicitLanguage = true;
+ }
+
+ const nsFont* defaultVariableFont =
+ aPresContext->GetDefaultFont(kPresContext_DefaultVariableFont_ID,
+ aFont->mLanguage);
+
+ // -moz-system-font: enum (never inherit!)
+ static_assert(
+ NS_STYLE_FONT_CAPTION == LookAndFeel::eFont_Caption &&
+ NS_STYLE_FONT_ICON == LookAndFeel::eFont_Icon &&
+ NS_STYLE_FONT_MENU == LookAndFeel::eFont_Menu &&
+ NS_STYLE_FONT_MESSAGE_BOX == LookAndFeel::eFont_MessageBox &&
+ NS_STYLE_FONT_SMALL_CAPTION == LookAndFeel::eFont_SmallCaption &&
+ NS_STYLE_FONT_STATUS_BAR == LookAndFeel::eFont_StatusBar &&
+ NS_STYLE_FONT_WINDOW == LookAndFeel::eFont_Window &&
+ NS_STYLE_FONT_DOCUMENT == LookAndFeel::eFont_Document &&
+ NS_STYLE_FONT_WORKSPACE == LookAndFeel::eFont_Workspace &&
+ NS_STYLE_FONT_DESKTOP == LookAndFeel::eFont_Desktop &&
+ NS_STYLE_FONT_INFO == LookAndFeel::eFont_Info &&
+ NS_STYLE_FONT_DIALOG == LookAndFeel::eFont_Dialog &&
+ NS_STYLE_FONT_BUTTON == LookAndFeel::eFont_Button &&
+ NS_STYLE_FONT_PULL_DOWN_MENU == LookAndFeel::eFont_PullDownMenu &&
+ NS_STYLE_FONT_LIST == LookAndFeel::eFont_List &&
+ NS_STYLE_FONT_FIELD == LookAndFeel::eFont_Field,
+ "LookAndFeel.h system-font constants out of sync with nsStyleConsts.h");
+
+ // Fall back to defaultVariableFont.
+ nsFont systemFont = *defaultVariableFont;
+ const nsCSSValue* systemFontValue = aRuleData->ValueForSystemFont();
+ if (eCSSUnit_Enumerated == systemFontValue->GetUnit()) {
+ gfxFontStyle fontStyle;
+ LookAndFeel::FontID fontID =
+ (LookAndFeel::FontID)systemFontValue->GetIntValue();
+ float devPerCSS =
+ (float)nsPresContext::AppUnitsPerCSSPixel() /
+ aPresContext->DeviceContext()->AppUnitsPerDevPixelAtUnitFullZoom();
+ nsAutoString systemFontName;
+ if (LookAndFeel::GetFont(fontID, systemFontName, fontStyle, devPerCSS)) {
+ systemFontName.Trim("\"'");
+ systemFont.fontlist = FontFamilyList(systemFontName, eUnquotedName);
+ systemFont.fontlist.SetDefaultFontType(eFamily_none);
+ systemFont.style = fontStyle.style;
+ systemFont.systemFont = fontStyle.systemFont;
+ systemFont.weight = fontStyle.weight;
+ systemFont.stretch = fontStyle.stretch;
+ systemFont.size =
+ NSFloatPixelsToAppUnits(fontStyle.size,
+ aPresContext->DeviceContext()->
+ AppUnitsPerDevPixelAtUnitFullZoom());
+ //systemFont.langGroup = fontStyle.langGroup;
+ systemFont.sizeAdjust = fontStyle.sizeAdjust;
+
+#ifdef XP_WIN
+ // XXXldb This platform-specific stuff should be in the
+ // LookAndFeel implementation, not here.
+ // XXXzw Should we even still *have* this code? It looks to be making
+ // old, probably obsolete assumptions.
+
+ if (fontID == LookAndFeel::eFont_Field ||
+ fontID == LookAndFeel::eFont_Button ||
+ fontID == LookAndFeel::eFont_List) {
+ // As far as I can tell the system default fonts and sizes
+ // on MS-Windows for Buttons, Listboxes/Comboxes and Text Fields are
+ // all pre-determined and cannot be changed by either the control panel
+ // or programmatically.
+ // Fields (text fields)
+ // Button and Selects (listboxes/comboboxes)
+ // We use whatever font is defined by the system. Which it appears
+ // (and the assumption is) it is always a proportional font. Then we
+ // always use 2 points smaller than what the browser has defined as
+ // the default proportional font.
+ // Assumption: system defined font is proportional
+ systemFont.size =
+ std::max(defaultVariableFont->size -
+ nsPresContext::CSSPointsToAppUnits(2), 0);
+ }
+#endif
+ }
+ }
+
+ // font-family: font family list, enum, inherit
+ const nsCSSValue* familyValue = aRuleData->ValueForFontFamily();
+ NS_ASSERTION(eCSSUnit_Enumerated != familyValue->GetUnit(),
+ "system fonts should not be in mFamily anymore");
+ if (eCSSUnit_FontFamilyList == familyValue->GetUnit()) {
+ // set the correct font if we are using DocumentFonts OR we are overriding for XUL
+ // MJA: bug 31816
+ bool useDocumentFonts =
+ aPresContext->GetCachedBoolPref(kPresContext_UseDocumentFonts);
+ if (aGenericFontID == kGenericFont_NONE ||
+ (!useDocumentFonts && (aGenericFontID == kGenericFont_cursive ||
+ aGenericFontID == kGenericFont_fantasy))) {
+ FontFamilyType defaultGeneric =
+ defaultVariableFont->fontlist.FirstGeneric();
+ MOZ_ASSERT(defaultVariableFont->fontlist.Length() == 1 &&
+ (defaultGeneric == eFamily_serif ||
+ defaultGeneric == eFamily_sans_serif));
+ if (defaultGeneric != eFamily_none) {
+ if (useDocumentFonts) {
+ aFont->mFont.fontlist.SetDefaultFontType(defaultGeneric);
+ } else {
+ // Either prioritize the first generic in the list,
+ // or (if there isn't one) prepend the default variable font.
+ if (!aFont->mFont.fontlist.PrioritizeFirstGeneric()) {
+ aFont->mFont.fontlist.PrependGeneric(defaultGeneric);
+ }
+ }
+ }
+ } else {
+ aFont->mFont.fontlist.SetDefaultFontType(eFamily_none);
+ }
+ aFont->mFont.systemFont = false;
+ // Technically this is redundant with the code below, but it's good
+ // to have since we'll still want it once we get rid of
+ // SetGenericFont (bug 380915).
+ aFont->mGenericID = aGenericFontID;
+ }
+ else if (eCSSUnit_System_Font == familyValue->GetUnit()) {
+ aFont->mFont.fontlist = systemFont.fontlist;
+ aFont->mFont.systemFont = true;
+ aFont->mGenericID = kGenericFont_NONE;
+ }
+ else if (eCSSUnit_Inherit == familyValue->GetUnit() ||
+ eCSSUnit_Unset == familyValue->GetUnit()) {
+ aConditions.SetUncacheable();
+ aFont->mFont.fontlist = aParentFont->mFont.fontlist;
+ aFont->mFont.systemFont = aParentFont->mFont.systemFont;
+ aFont->mGenericID = aParentFont->mGenericID;
+ }
+ else if (eCSSUnit_Initial == familyValue->GetUnit()) {
+ aFont->mFont.fontlist = defaultVariableFont->fontlist;
+ aFont->mFont.systemFont = defaultVariableFont->systemFont;
+ aFont->mGenericID = kGenericFont_NONE;
+ }
+
+ // When we're in the loop in SetGenericFont, we must ensure that we
+ // always keep aFont->mFlags set to the correct generic. But we have
+ // to be careful not to touch it when we're called directly from
+ // ComputeFontData, because we could have a start struct.
+ if (aGenericFontID != kGenericFont_NONE) {
+ aFont->mGenericID = aGenericFontID;
+ }
+
+ // -moz-math-variant: enum, inherit, initial
+ SetValue(*aRuleData->ValueForMathVariant(), aFont->mMathVariant,
+ aConditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ aParentFont->mMathVariant, NS_MATHML_MATHVARIANT_NONE);
+
+ // -moz-math-display: enum, inherit, initial
+ SetValue(*aRuleData->ValueForMathDisplay(), aFont->mMathDisplay,
+ aConditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ aParentFont->mMathDisplay, NS_MATHML_DISPLAYSTYLE_INLINE);
+
+ // font-smoothing: enum, inherit, initial
+ SetValue(*aRuleData->ValueForOsxFontSmoothing(),
+ aFont->mFont.smoothing, aConditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ aParentFont->mFont.smoothing,
+ defaultVariableFont->smoothing);
+
+ // font-style: enum, inherit, initial, -moz-system-font
+ if (aFont->mMathVariant != NS_MATHML_MATHVARIANT_NONE) {
+ // -moz-math-variant overrides font-style
+ aFont->mFont.style = NS_FONT_STYLE_NORMAL;
+ } else {
+ SetValue(*aRuleData->ValueForFontStyle(),
+ aFont->mFont.style, aConditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ aParentFont->mFont.style,
+ defaultVariableFont->style,
+ Unused, Unused, Unused, systemFont.style);
+ }
+
+ // font-weight: int, enum, inherit, initial, -moz-system-font
+ // special handling for enum
+ const nsCSSValue* weightValue = aRuleData->ValueForFontWeight();
+ if (aFont->mMathVariant != NS_MATHML_MATHVARIANT_NONE) {
+ // -moz-math-variant overrides font-weight
+ aFont->mFont.weight = NS_FONT_WEIGHT_NORMAL;
+ } else if (eCSSUnit_Enumerated == weightValue->GetUnit()) {
+ int32_t value = weightValue->GetIntValue();
+ switch (value) {
+ case NS_STYLE_FONT_WEIGHT_NORMAL:
+ case NS_STYLE_FONT_WEIGHT_BOLD:
+ aFont->mFont.weight = value;
+ break;
+ case NS_STYLE_FONT_WEIGHT_BOLDER: {
+ aConditions.SetUncacheable();
+ int32_t inheritedValue = aParentFont->mFont.weight;
+ if (inheritedValue <= 300) {
+ aFont->mFont.weight = 400;
+ } else if (inheritedValue <= 500) {
+ aFont->mFont.weight = 700;
+ } else {
+ aFont->mFont.weight = 900;
+ }
+ break;
+ }
+ case NS_STYLE_FONT_WEIGHT_LIGHTER: {
+ aConditions.SetUncacheable();
+ int32_t inheritedValue = aParentFont->mFont.weight;
+ if (inheritedValue < 600) {
+ aFont->mFont.weight = 100;
+ } else if (inheritedValue < 800) {
+ aFont->mFont.weight = 400;
+ } else {
+ aFont->mFont.weight = 700;
+ }
+ break;
+ }
+ }
+ } else
+ SetValue(*weightValue, aFont->mFont.weight, aConditions,
+ SETVAL_INTEGER | SETVAL_UNSET_INHERIT,
+ aParentFont->mFont.weight,
+ defaultVariableFont->weight,
+ Unused, Unused, Unused, systemFont.weight);
+
+ // font-stretch: enum, inherit, initial, -moz-system-font
+ SetValue(*aRuleData->ValueForFontStretch(),
+ aFont->mFont.stretch, aConditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ aParentFont->mFont.stretch,
+ defaultVariableFont->stretch,
+ Unused, Unused, Unused, systemFont.stretch);
+
+ // Compute scriptlevel, scriptminsize and scriptsizemultiplier now so
+ // they're available for font-size computation.
+
+ // -moz-script-min-size: length
+ const nsCSSValue* scriptMinSizeValue = aRuleData->ValueForScriptMinSize();
+ if (scriptMinSizeValue->IsLengthUnit()) {
+ // scriptminsize in font units (em, ex) has to be interpreted relative
+ // to the parent font, or the size definitions are circular and we
+ //
+ aFont->mScriptMinSize =
+ CalcLengthWith(*scriptMinSizeValue, aParentFont->mSize,
+ aParentFont,
+ aContext, aPresContext, atRoot, true /* aUseUserFontSet */,
+ aConditions);
+ }
+
+ // -moz-script-size-multiplier: factor, inherit, initial
+ SetFactor(*aRuleData->ValueForScriptSizeMultiplier(),
+ aFont->mScriptSizeMultiplier,
+ aConditions, aParentFont->mScriptSizeMultiplier,
+ NS_MATHML_DEFAULT_SCRIPT_SIZE_MULTIPLIER,
+ SETFCT_POSITIVE | SETFCT_UNSET_INHERIT);
+
+ // -moz-script-level: integer, number, inherit
+ const nsCSSValue* scriptLevelValue = aRuleData->ValueForScriptLevel();
+ if (eCSSUnit_Integer == scriptLevelValue->GetUnit()) {
+ // "relative"
+ aConditions.SetUncacheable();
+ aFont->mScriptLevel = ClampTo8Bit(aParentFont->mScriptLevel + scriptLevelValue->GetIntValue());
+ }
+ else if (eCSSUnit_Number == scriptLevelValue->GetUnit()) {
+ // "absolute"
+ aFont->mScriptLevel = ClampTo8Bit(int32_t(scriptLevelValue->GetFloatValue()));
+ }
+ else if (eCSSUnit_Auto == scriptLevelValue->GetUnit()) {
+ // auto
+ aConditions.SetUncacheable();
+ aFont->mScriptLevel = ClampTo8Bit(aParentFont->mScriptLevel +
+ (aParentFont->mMathDisplay ==
+ NS_MATHML_DISPLAYSTYLE_INLINE ? 1 : 0));
+ }
+ else if (eCSSUnit_Inherit == scriptLevelValue->GetUnit() ||
+ eCSSUnit_Unset == scriptLevelValue->GetUnit()) {
+ aConditions.SetUncacheable();
+ aFont->mScriptLevel = aParentFont->mScriptLevel;
+ }
+ else if (eCSSUnit_Initial == scriptLevelValue->GetUnit()) {
+ aFont->mScriptLevel = 0;
+ }
+
+ // font-kerning: none, enum, inherit, initial, -moz-system-font
+ SetValue(*aRuleData->ValueForFontKerning(),
+ aFont->mFont.kerning, aConditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ aParentFont->mFont.kerning,
+ defaultVariableFont->kerning,
+ Unused, Unused, Unused, systemFont.kerning);
+
+ // font-synthesis: none, enum (bit field), inherit, initial, -moz-system-font
+ SetValue(*aRuleData->ValueForFontSynthesis(),
+ aFont->mFont.synthesis, aConditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ aParentFont->mFont.synthesis,
+ defaultVariableFont->synthesis,
+ Unused, /* none */ 0, Unused, systemFont.synthesis);
+
+ // font-variant-alternates: normal, enum (bit field) + functions, inherit,
+ // initial, -moz-system-font
+ const nsCSSValue* variantAlternatesValue =
+ aRuleData->ValueForFontVariantAlternates();
+ int32_t variantAlternates = 0;
+
+ switch (variantAlternatesValue->GetUnit()) {
+ case eCSSUnit_Inherit:
+ case eCSSUnit_Unset:
+ aFont->mFont.CopyAlternates(aParentFont->mFont);
+ aConditions.SetUncacheable();
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Normal:
+ aFont->mFont.variantAlternates = 0;
+ aFont->mFont.alternateValues.Clear();
+ aFont->mFont.featureValueLookup = nullptr;
+ break;
+
+ case eCSSUnit_Pair:
+ NS_ASSERTION(variantAlternatesValue->GetPairValue().mXValue.GetUnit() ==
+ eCSSUnit_Enumerated, "strange unit for variantAlternates");
+ variantAlternates =
+ variantAlternatesValue->GetPairValue().mXValue.GetIntValue();
+ aFont->mFont.variantAlternates = variantAlternates;
+
+ if (variantAlternates & NS_FONT_VARIANT_ALTERNATES_FUNCTIONAL_MASK) {
+ // fetch the feature lookup object from the styleset
+ MOZ_ASSERT(aPresContext->StyleSet()->IsGecko(),
+ "ServoStyleSets should not have rule nodes");
+ aFont->mFont.featureValueLookup =
+ aPresContext->StyleSet()->AsGecko()->GetFontFeatureValuesLookup();
+
+ NS_ASSERTION(variantAlternatesValue->GetPairValue().mYValue.GetUnit() ==
+ eCSSUnit_List, "function list not a list value");
+ nsStyleUtil::ComputeFunctionalAlternates(
+ variantAlternatesValue->GetPairValue().mYValue.GetListValue(),
+ aFont->mFont.alternateValues);
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ // font-variant-caps: normal, enum, inherit, initial, -moz-system-font
+ SetValue(*aRuleData->ValueForFontVariantCaps(),
+ aFont->mFont.variantCaps, aConditions,
+ SETVAL_ENUMERATED |SETVAL_UNSET_INHERIT,
+ aParentFont->mFont.variantCaps,
+ defaultVariableFont->variantCaps,
+ Unused, Unused, /* normal */ 0, systemFont.variantCaps);
+
+ // font-variant-east-asian: normal, enum (bit field), inherit, initial,
+ // -moz-system-font
+ SetValue(*aRuleData->ValueForFontVariantEastAsian(),
+ aFont->mFont.variantEastAsian, aConditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ aParentFont->mFont.variantEastAsian,
+ defaultVariableFont->variantEastAsian,
+ Unused, Unused, /* normal */ 0, systemFont.variantEastAsian);
+
+ // font-variant-ligatures: normal, none, enum (bit field), inherit, initial,
+ // -moz-system-font
+ SetValue(*aRuleData->ValueForFontVariantLigatures(),
+ aFont->mFont.variantLigatures, aConditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ aParentFont->mFont.variantLigatures,
+ defaultVariableFont->variantLigatures,
+ Unused, NS_FONT_VARIANT_LIGATURES_NONE, /* normal */ 0,
+ systemFont.variantLigatures);
+
+ // font-variant-numeric: normal, enum (bit field), inherit, initial,
+ // -moz-system-font
+ SetValue(*aRuleData->ValueForFontVariantNumeric(),
+ aFont->mFont.variantNumeric, aConditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ aParentFont->mFont.variantNumeric,
+ defaultVariableFont->variantNumeric,
+ Unused, Unused, /* normal */ 0, systemFont.variantNumeric);
+
+ // font-variant-position: normal, enum, inherit, initial,
+ // -moz-system-font
+ SetValue(*aRuleData->ValueForFontVariantPosition(),
+ aFont->mFont.variantPosition, aConditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ aParentFont->mFont.variantPosition,
+ defaultVariableFont->variantPosition,
+ Unused, Unused, /* normal */ 0, systemFont.variantPosition);
+
+ // font-feature-settings
+ const nsCSSValue* featureSettingsValue =
+ aRuleData->ValueForFontFeatureSettings();
+
+ switch (featureSettingsValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Normal:
+ case eCSSUnit_Initial:
+ aFont->mFont.fontFeatureSettings.Clear();
+ break;
+
+ case eCSSUnit_Inherit:
+ case eCSSUnit_Unset:
+ aConditions.SetUncacheable();
+ aFont->mFont.fontFeatureSettings = aParentFont->mFont.fontFeatureSettings;
+ break;
+
+ case eCSSUnit_System_Font:
+ aFont->mFont.fontFeatureSettings = systemFont.fontFeatureSettings;
+ break;
+
+ case eCSSUnit_PairList:
+ case eCSSUnit_PairListDep:
+ ComputeFontFeatures(featureSettingsValue->GetPairListValue(),
+ aFont->mFont.fontFeatureSettings);
+ break;
+
+ default:
+ MOZ_ASSERT(false, "unexpected value unit");
+ break;
+ }
+
+ // font-language-override
+ const nsCSSValue* languageOverrideValue =
+ aRuleData->ValueForFontLanguageOverride();
+ if (eCSSUnit_Inherit == languageOverrideValue->GetUnit() ||
+ eCSSUnit_Unset == languageOverrideValue->GetUnit()) {
+ aConditions.SetUncacheable();
+ aFont->mFont.languageOverride = aParentFont->mFont.languageOverride;
+ } else if (eCSSUnit_Normal == languageOverrideValue->GetUnit() ||
+ eCSSUnit_Initial == languageOverrideValue->GetUnit()) {
+ aFont->mFont.languageOverride.Truncate();
+ } else if (eCSSUnit_System_Font == languageOverrideValue->GetUnit()) {
+ aFont->mFont.languageOverride = systemFont.languageOverride;
+ } else if (eCSSUnit_String == languageOverrideValue->GetUnit()) {
+ languageOverrideValue->GetStringValue(aFont->mFont.languageOverride);
+ }
+
+ // -moz-min-font-size-ratio: percent, inherit
+ const nsCSSValue* minFontSizeRatio = aRuleData->ValueForMinFontSizeRatio();
+ switch (minFontSizeRatio->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_Unset:
+ case eCSSUnit_Inherit:
+ aFont->mMinFontSizeRatio = aParentFont->mMinFontSizeRatio;
+ aConditions.SetUncacheable();
+ break;
+ case eCSSUnit_Initial:
+ aFont->mMinFontSizeRatio = 100; // 100%
+ break;
+ case eCSSUnit_Percent: {
+ // While percentages are parsed as floating point numbers, we
+ // only store an integer in the range [0, 255] since that's all
+ // we need for now.
+ float percent = minFontSizeRatio->GetPercentValue() * 100;
+ if (percent < 0) {
+ percent = 0;
+ } else if (percent > 255) {
+ percent = 255;
+ }
+ aFont->mMinFontSizeRatio = uint8_t(percent);
+ break;
+ }
+ default:
+ MOZ_ASSERT_UNREACHABLE("Unknown unit for -moz-min-font-size-ratio");
+ }
+
+ nscoord scriptLevelAdjustedUnconstrainedParentSize;
+
+ // font-size: enum, length, percent, inherit
+ nscoord scriptLevelAdjustedParentSize =
+ ComputeScriptLevelSize(aFont, aParentFont, aPresContext,
+ &scriptLevelAdjustedUnconstrainedParentSize);
+ NS_ASSERTION(!aUsedStartStruct || aFont->mScriptUnconstrainedSize == aFont->mSize,
+ "If we have a start struct, we should have reset everything coming in here");
+
+ // Compute whether we're affected by scriptMinSize *before* calling
+ // SetFontSize, since aParentFont might be the same as aFont. If it
+ // is, calling SetFontSize might throw off our calculation.
+ bool affectedByScriptMinSize =
+ aParentFont->mSize != aParentFont->mScriptUnconstrainedSize ||
+ scriptLevelAdjustedParentSize !=
+ scriptLevelAdjustedUnconstrainedParentSize;
+
+ SetFontSize(aPresContext, aContext,
+ aRuleData, aFont, aParentFont,
+ &aFont->mSize,
+ systemFont, aParentFont->mSize, scriptLevelAdjustedParentSize,
+ aUsedStartStruct, atRoot, aConditions);
+ if (!aPresContext->Document()->GetMathMLEnabled()) {
+ MOZ_ASSERT(!affectedByScriptMinSize);
+ // If MathML is not enabled, we don't need to mark this node as
+ // uncacheable. If it becomes enabled, code in
+ // nsMathMLElementFactory will rebuild the rule tree and style data
+ // when MathML is first enabled (see nsMathMLElement::BindToTree).
+ aFont->mScriptUnconstrainedSize = aFont->mSize;
+ } else if (!affectedByScriptMinSize) {
+ // Fast path: we have not been affected by scriptminsize so we don't
+ // need to call SetFontSize again to compute the
+ // scriptminsize-unconstrained size. This is OK even if we have a
+ // start struct, because if we have a start struct then 'font-size'
+ // was specified and so scriptminsize has no effect.
+ aFont->mScriptUnconstrainedSize = aFont->mSize;
+ // It's possible we could, in the future, have a different parent,
+ // which would lead to a different affectedByScriptMinSize.
+ aConditions.SetUncacheable();
+ } else {
+ // see previous else-if
+ aConditions.SetUncacheable();
+
+ // Use a separate conditions object because it might get a
+ // *different* font-size dependency. We can ignore it because we've
+ // already called SetUncacheable.
+ RuleNodeCacheConditions unconstrainedConditions;
+
+ SetFontSize(aPresContext, aContext,
+ aRuleData, aFont, aParentFont,
+ &aFont->mScriptUnconstrainedSize,
+ systemFont, aParentFont->mScriptUnconstrainedSize,
+ scriptLevelAdjustedUnconstrainedParentSize,
+ aUsedStartStruct, atRoot, unconstrainedConditions);
+ }
+ NS_ASSERTION(aFont->mScriptUnconstrainedSize <= aFont->mSize,
+ "scriptminsize should never be making things bigger");
+
+ nscoord fontSize = aFont->mSize;
+
+ // enforce the user' specified minimum font-size on the value that we expose
+ // (but don't change font-size:0, since that would unhide hidden text)
+ if (fontSize > 0) {
+ nscoord minFontSize = aPresContext->MinFontSize(aFont->mLanguage);
+ if (minFontSize < 0) {
+ minFontSize = 0;
+ } else {
+ minFontSize = (minFontSize * aFont->mMinFontSizeRatio) / 100;
+ }
+ if (fontSize < minFontSize && !aPresContext->IsChrome()) {
+ // override the minimum font-size constraint
+ fontSize = minFontSize;
+ }
+ }
+ aFont->mFont.size = fontSize;
+
+ // font-size-adjust: number, none, inherit, initial, -moz-system-font
+ const nsCSSValue* sizeAdjustValue = aRuleData->ValueForFontSizeAdjust();
+ if (eCSSUnit_System_Font == sizeAdjustValue->GetUnit()) {
+ aFont->mFont.sizeAdjust = systemFont.sizeAdjust;
+ } else
+ SetFactor(*sizeAdjustValue, aFont->mFont.sizeAdjust,
+ aConditions, aParentFont->mFont.sizeAdjust, -1.0f,
+ SETFCT_NONE | SETFCT_UNSET_INHERIT);
+}
+
+/* static */ void
+nsRuleNode::ComputeFontFeatures(const nsCSSValuePairList *aFeaturesList,
+ nsTArray<gfxFontFeature>& aFeatureSettings)
+{
+ aFeatureSettings.Clear();
+ for (const nsCSSValuePairList* p = aFeaturesList; p; p = p->mNext) {
+ gfxFontFeature feat = {0, 0};
+
+ MOZ_ASSERT(aFeaturesList->mXValue.GetUnit() == eCSSUnit_String,
+ "unexpected value unit");
+
+ // tag is a 4-byte ASCII sequence
+ nsAutoString tag;
+ p->mXValue.GetStringValue(tag);
+ if (tag.Length() != 4) {
+ continue;
+ }
+ // parsing validates that these are ASCII chars
+ // tags are always big-endian
+ feat.mTag = (tag[0] << 24) | (tag[1] << 16) | (tag[2] << 8) | tag[3];
+
+ // value
+ NS_ASSERTION(p->mYValue.GetUnit() == eCSSUnit_Integer,
+ "should have found an integer unit");
+ feat.mValue = p->mYValue.GetIntValue();
+
+ aFeatureSettings.AppendElement(feat);
+ }
+}
+
+// This should die (bug 380915).
+//
+// SetGenericFont:
+// - backtrack to an ancestor with the same generic font name (possibly
+// up to the root where default values come from the presentation context)
+// - re-apply cascading rules from there without caching intermediate values
+/* static */ void
+nsRuleNode::SetGenericFont(nsPresContext* aPresContext,
+ nsStyleContext* aContext,
+ uint8_t aGenericFontID,
+ nsStyleFont* aFont)
+{
+ // walk up the contexts until a context with the desired generic font
+ AutoTArray<nsStyleContext*, 8> contextPath;
+ contextPath.AppendElement(aContext);
+ nsStyleContext* higherContext = aContext->GetParent();
+ while (higherContext) {
+ if (higherContext->StyleFont()->mGenericID == aGenericFontID) {
+ // done walking up the higher contexts
+ break;
+ }
+ contextPath.AppendElement(higherContext);
+ higherContext = higherContext->GetParent();
+ }
+
+ // re-apply the cascading rules, starting from the higher context
+
+ // If we stopped earlier because we reached the root of the style tree,
+ // we will start with the default generic font from the presentation
+ // context. Otherwise we start with the higher context.
+ const nsFont* defaultFont =
+ aPresContext->GetDefaultFont(aGenericFontID, aFont->mLanguage);
+ nsStyleFont parentFont(*defaultFont, aPresContext);
+ if (higherContext) {
+ const nsStyleFont* tmpFont = higherContext->StyleFont();
+ parentFont = *tmpFont;
+ }
+ *aFont = parentFont;
+
+ uint32_t fontBit = nsCachedStyleData::GetBitForSID(eStyleStruct_Font);
+
+ // use placement new[] on the result of alloca() to allocate a
+ // variable-sized stack array, including execution of constructors,
+ // and use an RAII class to run the destructors too.
+ size_t nprops = nsCSSProps::PropertyCountInStruct(eStyleStruct_Font);
+ void* dataStorage = alloca(nprops * sizeof(nsCSSValue));
+
+ for (int32_t i = contextPath.Length() - 1; i >= 0; --i) {
+ nsStyleContext* context = contextPath[i];
+ AutoCSSValueArray dataArray(dataStorage, nprops);
+
+ nsRuleData ruleData(NS_STYLE_INHERIT_BIT(Font), dataArray.get(),
+ aPresContext, context);
+ ruleData.mValueOffsets[eStyleStruct_Font] = 0;
+
+ // Trimmed down version of ::WalkRuleTree() to re-apply the style rules
+ // Note that we *do* need to do this for our own data, since what is
+ // in |fontData| in ComputeFontData is only for the rules below
+ // aStartStruct.
+ for (nsRuleNode* ruleNode = context->RuleNode(); ruleNode;
+ ruleNode = ruleNode->GetParent()) {
+ if (ruleNode->mNoneBits & fontBit)
+ // no more font rules on this branch, get out
+ break;
+
+ nsIStyleRule *rule = ruleNode->GetRule();
+ if (rule) {
+ ruleData.mLevel = ruleNode->GetLevel();
+ ruleData.mIsImportantRule = ruleNode->IsImportantRule();
+ rule->MapRuleInfoInto(&ruleData);
+ }
+ }
+
+ // Compute the delta from the information that the rules specified
+
+ // Avoid unnecessary operations in SetFont(). But we care if it's
+ // the final value that we're computing.
+ if (i != 0)
+ ruleData.ValueForFontFamily()->Reset();
+
+ ResolveVariableReferences(eStyleStruct_Font, &ruleData, aContext);
+
+ RuleNodeCacheConditions dummy;
+ nsRuleNode::SetFont(aPresContext, context,
+ aGenericFontID, &ruleData, &parentFont, aFont,
+ false, dummy);
+
+ parentFont = *aFont;
+ }
+
+ if (higherContext && contextPath.Length() > 1) {
+ // contextPath is a list of all ancestor style contexts, so it must have
+ // at least two elements for it to result in a dependency on grandancestor
+ // styles.
+ PropagateGrandancestorBit(aContext, higherContext);
+ }
+}
+
+const void*
+nsRuleNode::ComputeFontData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_INHERITED(Font, font, parentFont)
+
+ // NOTE: The |aRuleDetail| passed in is a little bit conservative due
+ // to the -moz-system-font property. We really don't need to consider
+ // it here in determining whether to cache in the rule tree. However,
+ // we do need to consider it in WalkRuleTree when deciding whether to
+ // walk further up the tree. So this means that when the font struct
+ // is fully specified using *longhand* properties (excluding
+ // -moz-system-font), we won't cache in the rule tree even though we
+ // could. However, it's pretty unlikely authors will do that
+ // (although there is a pretty good chance they'll fully specify it
+ // using the 'font' shorthand).
+
+ // Figure out if we are a generic font
+ uint8_t generic = kGenericFont_NONE;
+ // XXXldb What if we would have had a string if we hadn't been doing
+ // the optimization with a non-null aStartStruct?
+ const nsCSSValue* familyValue = aRuleData->ValueForFontFamily();
+ if (eCSSUnit_FontFamilyList == familyValue->GetUnit()) {
+ const FontFamilyList* fontlist = familyValue->GetFontFamilyListValue();
+ FontFamilyList& fl = font->mFont.fontlist;
+ fl = *fontlist;
+
+ // extract the first generic in the fontlist, if exists
+ FontFamilyType fontType = fontlist->FirstGeneric();
+
+ // if only a single generic, set the generic type
+ if (fontlist->Length() == 1) {
+ switch (fontType) {
+ case eFamily_serif:
+ generic = kGenericFont_serif;
+ break;
+ case eFamily_sans_serif:
+ generic = kGenericFont_sans_serif;
+ break;
+ case eFamily_monospace:
+ generic = kGenericFont_monospace;
+ break;
+ case eFamily_cursive:
+ generic = kGenericFont_cursive;
+ break;
+ case eFamily_fantasy:
+ generic = kGenericFont_fantasy;
+ break;
+ case eFamily_moz_fixed:
+ generic = kGenericFont_moz_fixed;
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ // Now compute our font struct
+ if (generic == kGenericFont_NONE) {
+ // continue the normal processing
+ nsRuleNode::SetFont(mPresContext, aContext, generic,
+ aRuleData, parentFont, font,
+ aStartStruct != nullptr, conditions);
+ }
+ else {
+ // re-calculate the font as a generic font
+ conditions.SetUncacheable();
+ nsRuleNode::SetGenericFont(mPresContext, aContext, generic,
+ font);
+ }
+
+ COMPUTE_END_INHERITED(Font, font)
+}
+
+template <typename T>
+inline uint32_t ListLength(const T* aList)
+{
+ uint32_t len = 0;
+ while (aList) {
+ len++;
+ aList = aList->mNext;
+ }
+ return len;
+}
+
+static already_AddRefed<nsCSSShadowArray>
+GetShadowData(const nsCSSValueList* aList,
+ nsStyleContext* aContext,
+ bool aIsBoxShadow,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+{
+ uint32_t arrayLength = ListLength(aList);
+
+ MOZ_ASSERT(arrayLength > 0,
+ "Non-null text-shadow list, yet we counted 0 items.");
+ RefPtr<nsCSSShadowArray> shadowList =
+ new(arrayLength) nsCSSShadowArray(arrayLength);
+
+ if (!shadowList)
+ return nullptr;
+
+ nsStyleCoord tempCoord;
+ DebugOnly<bool> unitOK;
+ for (nsCSSShadowItem* item = shadowList->ShadowAt(0);
+ aList;
+ aList = aList->mNext, ++item) {
+ MOZ_ASSERT(aList->mValue.GetUnit() == eCSSUnit_Array,
+ "expecting a plain array value");
+ nsCSSValue::Array *arr = aList->mValue.GetArrayValue();
+ // OK to pass bad aParentCoord since we're not passing SETCOORD_INHERIT
+ unitOK = SetCoord(arr->Item(0), tempCoord, nsStyleCoord(),
+ SETCOORD_LENGTH | SETCOORD_CALC_LENGTH_ONLY,
+ aContext, aPresContext, aConditions);
+ NS_ASSERTION(unitOK, "unexpected unit");
+ item->mXOffset = tempCoord.GetCoordValue();
+
+ unitOK = SetCoord(arr->Item(1), tempCoord, nsStyleCoord(),
+ SETCOORD_LENGTH | SETCOORD_CALC_LENGTH_ONLY,
+ aContext, aPresContext, aConditions);
+ NS_ASSERTION(unitOK, "unexpected unit");
+ item->mYOffset = tempCoord.GetCoordValue();
+
+ // Blur radius is optional in the current box-shadow spec
+ if (arr->Item(2).GetUnit() != eCSSUnit_Null) {
+ unitOK = SetCoord(arr->Item(2), tempCoord, nsStyleCoord(),
+ SETCOORD_LENGTH | SETCOORD_CALC_LENGTH_ONLY |
+ SETCOORD_CALC_CLAMP_NONNEGATIVE,
+ aContext, aPresContext, aConditions);
+ NS_ASSERTION(unitOK, "unexpected unit");
+ item->mRadius = tempCoord.GetCoordValue();
+ } else {
+ item->mRadius = 0;
+ }
+
+ // Find the spread radius
+ if (aIsBoxShadow && arr->Item(3).GetUnit() != eCSSUnit_Null) {
+ unitOK = SetCoord(arr->Item(3), tempCoord, nsStyleCoord(),
+ SETCOORD_LENGTH | SETCOORD_CALC_LENGTH_ONLY,
+ aContext, aPresContext, aConditions);
+ NS_ASSERTION(unitOK, "unexpected unit");
+ item->mSpread = tempCoord.GetCoordValue();
+ } else {
+ item->mSpread = 0;
+ }
+
+ if (arr->Item(4).GetUnit() != eCSSUnit_Null) {
+ item->mHasColor = true;
+ // 2nd argument can be bogus since inherit is not a valid color
+ unitOK = SetColor(arr->Item(4), 0, aPresContext, aContext, item->mColor,
+ aConditions);
+ NS_ASSERTION(unitOK, "unexpected unit");
+ }
+
+ if (aIsBoxShadow && arr->Item(5).GetUnit() == eCSSUnit_Enumerated) {
+ NS_ASSERTION(arr->Item(5).GetIntValue()
+ == uint8_t(StyleBoxShadowType::Inset),
+ "invalid keyword type for box shadow");
+ item->mInset = true;
+ } else {
+ item->mInset = false;
+ }
+ }
+
+ return shadowList.forget();
+}
+
+struct TextEmphasisChars
+{
+ const char16_t* mFilled;
+ const char16_t* mOpen;
+};
+
+#define TEXT_EMPHASIS_CHARS_LIST() \
+ TEXT_EMPHASIS_CHARS_ITEM(u"", u"", NONE) \
+ TEXT_EMPHASIS_CHARS_ITEM(u"\u2022", u"\u25e6", DOT) \
+ TEXT_EMPHASIS_CHARS_ITEM(u"\u25cf", u"\u25cb", CIRCLE) \
+ TEXT_EMPHASIS_CHARS_ITEM(u"\u25c9", u"\u25ce", DOUBLE_CIRCLE) \
+ TEXT_EMPHASIS_CHARS_ITEM(u"\u25b2", u"\u25b3", TRIANGLE) \
+ TEXT_EMPHASIS_CHARS_ITEM(u"\ufe45", u"\ufe46", SESAME)
+
+static constexpr TextEmphasisChars kTextEmphasisChars[] =
+{
+#define TEXT_EMPHASIS_CHARS_ITEM(filled_, open_, type_) \
+ { filled_, open_ }, // type_
+ TEXT_EMPHASIS_CHARS_LIST()
+#undef TEXT_EMPHASIS_CHARS_ITEM
+};
+
+#define TEXT_EMPHASIS_CHARS_ITEM(filled_, open_, type_) \
+ static_assert(ArrayLength(filled_) <= 2 && \
+ ArrayLength(open_) <= 2, \
+ "emphasis marks should have no more than one char"); \
+ static_assert( \
+ *kTextEmphasisChars[NS_STYLE_TEXT_EMPHASIS_STYLE_##type_].mFilled == \
+ *filled_, "filled " #type_ " should be " #filled_); \
+ static_assert( \
+ *kTextEmphasisChars[NS_STYLE_TEXT_EMPHASIS_STYLE_##type_].mOpen == \
+ *open_, "open " #type_ " should be " #open_);
+TEXT_EMPHASIS_CHARS_LIST()
+#undef TEXT_EMPHASIS_CHARS_ITEM
+
+#undef TEXT_EMPHASIS_CHARS_LIST
+
+static void
+TruncateStringToSingleGrapheme(nsAString& aStr)
+{
+ unicode::ClusterIterator iter(aStr.Data(), aStr.Length());
+ if (!iter.AtEnd()) {
+ iter.Next();
+ if (!iter.AtEnd()) {
+ // Not mutating the string for common cases helps memory use
+ // since we share the buffer from the specified style into the
+ // computed style.
+ aStr.Truncate(iter - aStr.Data());
+ }
+ }
+}
+
+struct LineHeightCalcObj
+{
+ float mLineHeight;
+ bool mIsNumber;
+};
+
+struct SetLineHeightCalcOps : public css::NumbersAlreadyNormalizedOps
+{
+ typedef LineHeightCalcObj result_type;
+ nsStyleContext* const mStyleContext;
+ nsPresContext* const mPresContext;
+ RuleNodeCacheConditions& mConditions;
+
+ SetLineHeightCalcOps(nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+ : mStyleContext(aStyleContext),
+ mPresContext(aPresContext),
+ mConditions(aConditions)
+ {
+ }
+
+ result_type
+ MergeAdditive(nsCSSUnit aCalcFunction,
+ result_type aValue1, result_type aValue2)
+ {
+ MOZ_ASSERT(aValue1.mIsNumber == aValue2.mIsNumber);
+
+ LineHeightCalcObj result;
+ result.mIsNumber = aValue1.mIsNumber;
+ if (aCalcFunction == eCSSUnit_Calc_Plus) {
+ result.mLineHeight = aValue1.mLineHeight + aValue2.mLineHeight;
+ return result;
+ }
+ MOZ_ASSERT(aCalcFunction == eCSSUnit_Calc_Minus,
+ "unexpected unit");
+ result.mLineHeight = aValue1.mLineHeight - aValue2.mLineHeight;
+ return result;
+ }
+
+ result_type
+ MergeMultiplicativeL(nsCSSUnit aCalcFunction,
+ float aValue1, result_type aValue2)
+ {
+ MOZ_ASSERT(aCalcFunction == eCSSUnit_Calc_Times_L,
+ "unexpected unit");
+ LineHeightCalcObj result;
+ result.mIsNumber = aValue2.mIsNumber;
+ result.mLineHeight = aValue1 * aValue2.mLineHeight;
+ return result;
+ }
+
+ result_type
+ MergeMultiplicativeR(nsCSSUnit aCalcFunction,
+ result_type aValue1, float aValue2)
+ {
+ LineHeightCalcObj result;
+ result.mIsNumber = aValue1.mIsNumber;
+ if (aCalcFunction == eCSSUnit_Calc_Times_R) {
+ result.mLineHeight = aValue1.mLineHeight * aValue2;
+ return result;
+ }
+ MOZ_ASSERT(aCalcFunction == eCSSUnit_Calc_Divided,
+ "unexpected unit");
+ result.mLineHeight = aValue1.mLineHeight / aValue2;
+ return result;
+ }
+
+ result_type ComputeLeafValue(const nsCSSValue& aValue)
+ {
+ LineHeightCalcObj result;
+ if (aValue.IsLengthUnit()) {
+ result.mIsNumber = false;
+ result.mLineHeight = CalcLength(aValue, mStyleContext,
+ mPresContext, mConditions);
+ }
+ else if (eCSSUnit_Percent == aValue.GetUnit()) {
+ mConditions.SetUncacheable();
+ result.mIsNumber = false;
+ nscoord fontSize = mStyleContext->StyleFont()->mFont.size;
+ result.mLineHeight = fontSize * aValue.GetPercentValue();
+ }
+ else if (eCSSUnit_Number == aValue.GetUnit()) {
+ result.mIsNumber = true;
+ result.mLineHeight = aValue.GetFloatValue();
+ } else {
+ MOZ_ASSERT(false, "unexpected value");
+ result.mIsNumber = true;
+ result.mLineHeight = 1.0f;
+ }
+
+ return result;
+ }
+};
+
+const void*
+nsRuleNode::ComputeTextData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_INHERITED(Text, text, parentText)
+
+ auto setComplexColor = [&](const nsCSSValue* aValue,
+ StyleComplexColor nsStyleText::* aField) {
+ SetComplexColor<eUnsetInherit>(*aValue, parentText->*aField,
+ StyleComplexColor::CurrentColor(),
+ mPresContext, text->*aField, conditions);
+ };
+
+ // tab-size: integer, inherit
+ SetValue(*aRuleData->ValueForTabSize(),
+ text->mTabSize, conditions,
+ SETVAL_INTEGER | SETVAL_UNSET_INHERIT, parentText->mTabSize,
+ NS_STYLE_TABSIZE_INITIAL);
+
+ // letter-spacing: normal, length, inherit
+ SetCoord(*aRuleData->ValueForLetterSpacing(),
+ text->mLetterSpacing, parentText->mLetterSpacing,
+ SETCOORD_LH | SETCOORD_NORMAL | SETCOORD_INITIAL_NORMAL |
+ SETCOORD_CALC_LENGTH_ONLY | SETCOORD_UNSET_INHERIT,
+ aContext, mPresContext, conditions);
+
+ // text-shadow: none, list, inherit, initial
+ const nsCSSValue* textShadowValue = aRuleData->ValueForTextShadow();
+ if (textShadowValue->GetUnit() != eCSSUnit_Null) {
+ text->mTextShadow = nullptr;
+
+ // Don't need to handle none/initial explicitly: The above assignment
+ // takes care of that
+ if (textShadowValue->GetUnit() == eCSSUnit_Inherit ||
+ textShadowValue->GetUnit() == eCSSUnit_Unset) {
+ conditions.SetUncacheable();
+ text->mTextShadow = parentText->mTextShadow;
+ } else if (textShadowValue->GetUnit() == eCSSUnit_List ||
+ textShadowValue->GetUnit() == eCSSUnit_ListDep) {
+ // List of arrays
+ text->mTextShadow = GetShadowData(textShadowValue->GetListValue(),
+ aContext, false, mPresContext, conditions);
+ }
+ }
+
+ // line-height: normal, number, length, percent, calc, inherit
+ const nsCSSValue* lineHeightValue = aRuleData->ValueForLineHeight();
+ if (eCSSUnit_Percent == lineHeightValue->GetUnit()) {
+ conditions.SetUncacheable();
+ // Use |mFont.size| to pick up minimum font size.
+ text->mLineHeight.SetCoordValue(
+ NSToCoordRound(float(aContext->StyleFont()->mFont.size) *
+ lineHeightValue->GetPercentValue()));
+ }
+ else if (eCSSUnit_Initial == lineHeightValue->GetUnit() ||
+ eCSSUnit_System_Font == lineHeightValue->GetUnit()) {
+ text->mLineHeight.SetNormalValue();
+ }
+ else if (eCSSUnit_Calc == lineHeightValue->GetUnit()) {
+ SetLineHeightCalcOps ops(aContext, mPresContext, conditions);
+ LineHeightCalcObj obj = css::ComputeCalc(*lineHeightValue, ops);
+ if (obj.mIsNumber) {
+ text->mLineHeight.SetFactorValue(obj.mLineHeight);
+ } else {
+ text->mLineHeight.SetCoordValue(
+ NSToCoordRoundWithClamp(obj.mLineHeight));
+ }
+ }
+ else {
+ SetCoord(*lineHeightValue, text->mLineHeight, parentText->mLineHeight,
+ SETCOORD_LEH | SETCOORD_FACTOR | SETCOORD_NORMAL |
+ SETCOORD_UNSET_INHERIT,
+ aContext, mPresContext, conditions);
+ if (lineHeightValue->IsLengthUnit() &&
+ !lineHeightValue->IsRelativeLengthUnit()) {
+ nscoord lh = nsStyleFont::ZoomText(mPresContext,
+ text->mLineHeight.GetCoordValue());
+
+ conditions.SetUncacheable();
+ const nsStyleFont *font = aContext->StyleFont();
+ nscoord minimumFontSize = mPresContext->MinFontSize(font->mLanguage);
+
+ if (minimumFontSize > 0 && !mPresContext->IsChrome()) {
+ if (font->mSize != 0) {
+ lh = nscoord(float(lh) * float(font->mFont.size) / float(font->mSize));
+ } else {
+ lh = minimumFontSize;
+ }
+ }
+ text->mLineHeight.SetCoordValue(lh);
+ }
+ }
+
+
+ // text-align: enum, string, pair(enum|string), inherit, initial
+ // NOTE: string is not implemented yet.
+ const nsCSSValue* textAlignValue = aRuleData->ValueForTextAlign();
+ text->mTextAlignTrue = false;
+ if (eCSSUnit_String == textAlignValue->GetUnit()) {
+ NS_NOTYETIMPLEMENTED("align string");
+ } else if (eCSSUnit_Enumerated == textAlignValue->GetUnit() &&
+ NS_STYLE_TEXT_ALIGN_MOZ_CENTER_OR_INHERIT ==
+ textAlignValue->GetIntValue()) {
+ conditions.SetUncacheable();
+ uint8_t parentAlign = parentText->mTextAlign;
+ text->mTextAlign = (NS_STYLE_TEXT_ALIGN_START == parentAlign) ?
+ NS_STYLE_TEXT_ALIGN_CENTER : parentAlign;
+ } else if (eCSSUnit_Enumerated == textAlignValue->GetUnit() &&
+ NS_STYLE_TEXT_ALIGN_MATCH_PARENT ==
+ textAlignValue->GetIntValue()) {
+ conditions.SetUncacheable();
+ nsStyleContext* parent = aContext->GetParent();
+ if (parent) {
+ uint8_t parentAlign = parentText->mTextAlign;
+ uint8_t parentDirection = parent->StyleVisibility()->mDirection;
+ switch (parentAlign) {
+ case NS_STYLE_TEXT_ALIGN_START:
+ text->mTextAlign = parentDirection == NS_STYLE_DIRECTION_RTL ?
+ NS_STYLE_TEXT_ALIGN_RIGHT : NS_STYLE_TEXT_ALIGN_LEFT;
+ break;
+
+ case NS_STYLE_TEXT_ALIGN_END:
+ text->mTextAlign = parentDirection == NS_STYLE_DIRECTION_RTL ?
+ NS_STYLE_TEXT_ALIGN_LEFT : NS_STYLE_TEXT_ALIGN_RIGHT;
+ break;
+
+ default:
+ text->mTextAlign = parentAlign;
+ }
+ }
+ } else {
+ if (eCSSUnit_Pair == textAlignValue->GetUnit()) {
+ // Two values were specified, one must be 'true'.
+ text->mTextAlignTrue = true;
+ const nsCSSValuePair& textAlignValuePair = textAlignValue->GetPairValue();
+ textAlignValue = &textAlignValuePair.mXValue;
+ if (eCSSUnit_Enumerated == textAlignValue->GetUnit()) {
+ if (textAlignValue->GetIntValue() == NS_STYLE_TEXT_ALIGN_UNSAFE) {
+ textAlignValue = &textAlignValuePair.mYValue;
+ }
+ } else if (eCSSUnit_String == textAlignValue->GetUnit()) {
+ NS_NOTYETIMPLEMENTED("align string");
+ }
+ } else if (eCSSUnit_Inherit == textAlignValue->GetUnit() ||
+ eCSSUnit_Unset == textAlignValue->GetUnit()) {
+ text->mTextAlignTrue = parentText->mTextAlignTrue;
+ }
+ SetValue(*textAlignValue, text->mTextAlign, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mTextAlign,
+ NS_STYLE_TEXT_ALIGN_START);
+ }
+
+ // text-align-last: enum, pair(enum), inherit, initial
+ const nsCSSValue* textAlignLastValue = aRuleData->ValueForTextAlignLast();
+ text->mTextAlignLastTrue = false;
+ if (eCSSUnit_Pair == textAlignLastValue->GetUnit()) {
+ // Two values were specified, one must be 'true'.
+ text->mTextAlignLastTrue = true;
+ const nsCSSValuePair& textAlignLastValuePair = textAlignLastValue->GetPairValue();
+ textAlignLastValue = &textAlignLastValuePair.mXValue;
+ if (eCSSUnit_Enumerated == textAlignLastValue->GetUnit()) {
+ if (textAlignLastValue->GetIntValue() == NS_STYLE_TEXT_ALIGN_UNSAFE) {
+ textAlignLastValue = &textAlignLastValuePair.mYValue;
+ }
+ }
+ } else if (eCSSUnit_Inherit == textAlignLastValue->GetUnit() ||
+ eCSSUnit_Unset == textAlignLastValue->GetUnit()) {
+ text->mTextAlignLastTrue = parentText->mTextAlignLastTrue;
+ }
+ SetValue(*textAlignLastValue, text->mTextAlignLast,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mTextAlignLast,
+ NS_STYLE_TEXT_ALIGN_AUTO);
+
+ // text-indent: length, percent, calc, inherit, initial
+ SetCoord(*aRuleData->ValueForTextIndent(), text->mTextIndent, parentText->mTextIndent,
+ SETCOORD_LPH | SETCOORD_INITIAL_ZERO | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INHERIT,
+ aContext, mPresContext, conditions);
+
+ // text-transform: enum, inherit, initial
+ SetValue(*aRuleData->ValueForTextTransform(), text->mTextTransform, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mTextTransform,
+ NS_STYLE_TEXT_TRANSFORM_NONE);
+
+ // white-space: enum, inherit, initial
+ SetValue(*aRuleData->ValueForWhiteSpace(), text->mWhiteSpace, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mWhiteSpace,
+ NS_STYLE_WHITESPACE_NORMAL);
+
+ // word-break: enum, inherit, initial
+ SetValue(*aRuleData->ValueForWordBreak(), text->mWordBreak, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mWordBreak,
+ NS_STYLE_WORDBREAK_NORMAL);
+
+ // word-spacing: normal, length, percent, inherit
+ const nsCSSValue* wordSpacingValue = aRuleData->ValueForWordSpacing();
+ if (wordSpacingValue->GetUnit() == eCSSUnit_Normal) {
+ // Do this so that "normal" computes to 0px, as the CSS 2.1 spec requires.
+ text->mWordSpacing.SetCoordValue(0);
+ } else {
+ SetCoord(*aRuleData->ValueForWordSpacing(),
+ text->mWordSpacing, parentText->mWordSpacing,
+ SETCOORD_LPH | SETCOORD_INITIAL_ZERO |
+ SETCOORD_STORE_CALC | SETCOORD_UNSET_INHERIT,
+ aContext, mPresContext, conditions);
+ }
+
+ // overflow-wrap: enum, inherit, initial
+ SetValue(*aRuleData->ValueForOverflowWrap(), text->mOverflowWrap, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mOverflowWrap,
+ NS_STYLE_OVERFLOWWRAP_NORMAL);
+
+ // hyphens: enum, inherit, initial
+ SetValue(*aRuleData->ValueForHyphens(), text->mHyphens, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mHyphens,
+ NS_STYLE_HYPHENS_MANUAL);
+
+ // ruby-align: enum, inherit, initial
+ SetValue(*aRuleData->ValueForRubyAlign(),
+ text->mRubyAlign, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mRubyAlign,
+ NS_STYLE_RUBY_ALIGN_SPACE_AROUND);
+
+ // ruby-position: enum, inherit, initial
+ SetValue(*aRuleData->ValueForRubyPosition(),
+ text->mRubyPosition, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mRubyPosition,
+ NS_STYLE_RUBY_POSITION_OVER);
+
+ // text-size-adjust: none, auto, inherit, initial
+ SetValue(*aRuleData->ValueForTextSizeAdjust(), text->mTextSizeAdjust,
+ conditions, SETVAL_UNSET_INHERIT,
+ parentText->mTextSizeAdjust,
+ /* initial */ NS_STYLE_TEXT_SIZE_ADJUST_AUTO,
+ /* auto */ NS_STYLE_TEXT_SIZE_ADJUST_AUTO,
+ /* none */ NS_STYLE_TEXT_SIZE_ADJUST_NONE, Unused, Unused);
+
+ // text-combine-upright: enum, inherit, initial
+ SetValue(*aRuleData->ValueForTextCombineUpright(),
+ text->mTextCombineUpright,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mTextCombineUpright,
+ NS_STYLE_TEXT_COMBINE_UPRIGHT_NONE);
+
+ // text-emphasis-color: color, string, inherit, initial
+ setComplexColor(aRuleData->ValueForTextEmphasisColor(),
+ &nsStyleText::mTextEmphasisColor);
+
+ // text-emphasis-position: enum, inherit, initial
+ SetValue(*aRuleData->ValueForTextEmphasisPosition(),
+ text->mTextEmphasisPosition,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mTextEmphasisPosition,
+ NS_STYLE_TEXT_EMPHASIS_POSITION_OVER |
+ NS_STYLE_TEXT_EMPHASIS_POSITION_RIGHT);
+
+ // text-emphasis-style: string, enum, inherit, initial
+ const nsCSSValue* textEmphasisStyleValue =
+ aRuleData->ValueForTextEmphasisStyle();
+ switch (textEmphasisStyleValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_Initial:
+ case eCSSUnit_None: {
+ text->mTextEmphasisStyle = NS_STYLE_TEXT_EMPHASIS_STYLE_NONE;
+ text->mTextEmphasisStyleString = u"";
+ break;
+ }
+ case eCSSUnit_Inherit:
+ case eCSSUnit_Unset: {
+ conditions.SetUncacheable();
+ text->mTextEmphasisStyle = parentText->mTextEmphasisStyle;
+ text->mTextEmphasisStyleString = parentText->mTextEmphasisStyleString;
+ break;
+ }
+ case eCSSUnit_Enumerated: {
+ auto style = textEmphasisStyleValue->GetIntValue();
+ // If shape part is not specified, compute it according to the
+ // writing-mode. Note that, if the fill part (filled/open) is not
+ // specified, we compute it to filled per spec. Since that value
+ // is zero, no additional computation is needed. See the assertion
+ // in CSSParserImpl::ParseTextEmphasisStyle().
+ if (!(style & NS_STYLE_TEXT_EMPHASIS_STYLE_SHAPE_MASK)) {
+ conditions.SetUncacheable();
+ if (WritingMode(aContext).IsVertical()) {
+ style |= NS_STYLE_TEXT_EMPHASIS_STYLE_SESAME;
+ } else {
+ style |= NS_STYLE_TEXT_EMPHASIS_STYLE_CIRCLE;
+ }
+ }
+ text->mTextEmphasisStyle = style;
+ size_t shape = style & NS_STYLE_TEXT_EMPHASIS_STYLE_SHAPE_MASK;
+ MOZ_ASSERT(shape > 0 && shape < ArrayLength(kTextEmphasisChars));
+ const TextEmphasisChars& chars = kTextEmphasisChars[shape];
+ text->mTextEmphasisStyleString =
+ (style & NS_STYLE_TEXT_EMPHASIS_STYLE_FILL_MASK) ==
+ NS_STYLE_TEXT_EMPHASIS_STYLE_FILLED ? chars.mFilled : chars.mOpen;
+ break;
+ }
+ case eCSSUnit_String: {
+ text->mTextEmphasisStyle = NS_STYLE_TEXT_EMPHASIS_STYLE_STRING;
+ nsString strValue;
+ textEmphasisStyleValue->GetStringValue(strValue);
+ TruncateStringToSingleGrapheme(strValue);
+ text->mTextEmphasisStyleString = strValue;
+ break;
+ }
+ default:
+ MOZ_ASSERT_UNREACHABLE("Unknown value unit type");
+ }
+
+ // text-rendering: enum, inherit, initial
+ SetValue(*aRuleData->ValueForTextRendering(),
+ text->mTextRendering, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mTextRendering,
+ NS_STYLE_TEXT_RENDERING_AUTO);
+
+ // -webkit-text-fill-color: color, string, inherit, initial
+ setComplexColor(aRuleData->ValueForWebkitTextFillColor(),
+ &nsStyleText::mWebkitTextFillColor);
+
+ // -webkit-text-stroke-color: color, string, inherit, initial
+ setComplexColor(aRuleData->ValueForWebkitTextStrokeColor(),
+ &nsStyleText::mWebkitTextStrokeColor);
+
+ // -webkit-text-stroke-width: length, inherit, initial, enum
+ const nsCSSValue*
+ webkitTextStrokeWidthValue = aRuleData->ValueForWebkitTextStrokeWidth();
+ if (webkitTextStrokeWidthValue->GetUnit() == eCSSUnit_Enumerated) {
+ NS_ASSERTION(webkitTextStrokeWidthValue->GetIntValue() == NS_STYLE_BORDER_WIDTH_THIN ||
+ webkitTextStrokeWidthValue->GetIntValue() == NS_STYLE_BORDER_WIDTH_MEDIUM ||
+ webkitTextStrokeWidthValue->GetIntValue() == NS_STYLE_BORDER_WIDTH_THICK,
+ "Unexpected enum value");
+ text->mWebkitTextStrokeWidth.SetCoordValue(
+ mPresContext->GetBorderWidthTable()[webkitTextStrokeWidthValue->GetIntValue()]);
+ } else {
+ SetCoord(*webkitTextStrokeWidthValue, text->mWebkitTextStrokeWidth,
+ parentText->mWebkitTextStrokeWidth,
+ SETCOORD_LH | SETCOORD_CALC_LENGTH_ONLY |
+ SETCOORD_CALC_CLAMP_NONNEGATIVE |
+ SETCOORD_INITIAL_ZERO | SETCOORD_UNSET_INHERIT,
+ aContext, mPresContext, conditions);
+ }
+
+ // -moz-control-character-visibility: enum, inherit, initial
+ SetValue(*aRuleData->ValueForControlCharacterVisibility(),
+ text->mControlCharacterVisibility,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentText->mControlCharacterVisibility,
+ nsCSSParser::ControlCharVisibilityDefault());
+
+ COMPUTE_END_INHERITED(Text, text)
+}
+
+const void*
+nsRuleNode::ComputeTextResetData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(TextReset, text, parentText)
+
+ // text-decoration-line: enum (bit field), inherit, initial
+ const nsCSSValue* decorationLineValue =
+ aRuleData->ValueForTextDecorationLine();
+ if (eCSSUnit_Enumerated == decorationLineValue->GetUnit()) {
+ int32_t td = decorationLineValue->GetIntValue();
+ text->mTextDecorationLine = td;
+ if (td & NS_STYLE_TEXT_DECORATION_LINE_PREF_ANCHORS) {
+ bool underlineLinks =
+ mPresContext->GetCachedBoolPref(kPresContext_UnderlineLinks);
+ if (underlineLinks) {
+ text->mTextDecorationLine |= NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE;
+ }
+ else {
+ text->mTextDecorationLine &= ~NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE;
+ }
+ }
+ } else if (eCSSUnit_Inherit == decorationLineValue->GetUnit()) {
+ conditions.SetUncacheable();
+ text->mTextDecorationLine = parentText->mTextDecorationLine;
+ } else if (eCSSUnit_Initial == decorationLineValue->GetUnit() ||
+ eCSSUnit_Unset == decorationLineValue->GetUnit()) {
+ text->mTextDecorationLine = NS_STYLE_TEXT_DECORATION_LINE_NONE;
+ }
+
+ // text-decoration-color: color, string, enum, inherit, initial
+ SetComplexColor<eUnsetInitial>(*aRuleData->ValueForTextDecorationColor(),
+ parentText->mTextDecorationColor,
+ StyleComplexColor::CurrentColor(),
+ mPresContext,
+ text->mTextDecorationColor, conditions);
+
+ // text-decoration-style: enum, inherit, initial
+ const nsCSSValue* decorationStyleValue =
+ aRuleData->ValueForTextDecorationStyle();
+ if (eCSSUnit_Enumerated == decorationStyleValue->GetUnit()) {
+ text->mTextDecorationStyle = decorationStyleValue->GetIntValue();
+ } else if (eCSSUnit_Inherit == decorationStyleValue->GetUnit()) {
+ text->mTextDecorationStyle = parentText->mTextDecorationStyle;
+ conditions.SetUncacheable();
+ } else if (eCSSUnit_Initial == decorationStyleValue->GetUnit() ||
+ eCSSUnit_Unset == decorationStyleValue->GetUnit()) {
+ text->mTextDecorationStyle = NS_STYLE_TEXT_DECORATION_STYLE_SOLID;
+ }
+
+ // text-overflow: enum, string, pair(enum|string), inherit, initial
+ const nsCSSValue* textOverflowValue =
+ aRuleData->ValueForTextOverflow();
+ if (eCSSUnit_Initial == textOverflowValue->GetUnit() ||
+ eCSSUnit_Unset == textOverflowValue->GetUnit()) {
+ text->mTextOverflow = nsStyleTextOverflow();
+ } else if (eCSSUnit_Inherit == textOverflowValue->GetUnit()) {
+ conditions.SetUncacheable();
+ text->mTextOverflow = parentText->mTextOverflow;
+ } else if (eCSSUnit_Enumerated == textOverflowValue->GetUnit()) {
+ // A single enumerated value.
+ SetValue(*textOverflowValue, text->mTextOverflow.mRight.mType,
+ conditions,
+ SETVAL_ENUMERATED, parentText->mTextOverflow.mRight.mType,
+ NS_STYLE_TEXT_OVERFLOW_CLIP);
+ text->mTextOverflow.mRight.mString.Truncate();
+ text->mTextOverflow.mLeft.mType = NS_STYLE_TEXT_OVERFLOW_CLIP;
+ text->mTextOverflow.mLeft.mString.Truncate();
+ text->mTextOverflow.mLogicalDirections = true;
+ } else if (eCSSUnit_String == textOverflowValue->GetUnit()) {
+ // A single string value.
+ text->mTextOverflow.mRight.mType = NS_STYLE_TEXT_OVERFLOW_STRING;
+ textOverflowValue->GetStringValue(text->mTextOverflow.mRight.mString);
+ text->mTextOverflow.mLeft.mType = NS_STYLE_TEXT_OVERFLOW_CLIP;
+ text->mTextOverflow.mLeft.mString.Truncate();
+ text->mTextOverflow.mLogicalDirections = true;
+ } else if (eCSSUnit_Pair == textOverflowValue->GetUnit()) {
+ // Two values were specified.
+ text->mTextOverflow.mLogicalDirections = false;
+ const nsCSSValuePair& textOverflowValuePair =
+ textOverflowValue->GetPairValue();
+
+ const nsCSSValue *textOverflowLeftValue = &textOverflowValuePair.mXValue;
+ if (eCSSUnit_Enumerated == textOverflowLeftValue->GetUnit()) {
+ SetValue(*textOverflowLeftValue, text->mTextOverflow.mLeft.mType,
+ conditions,
+ SETVAL_ENUMERATED, parentText->mTextOverflow.mLeft.mType,
+ NS_STYLE_TEXT_OVERFLOW_CLIP);
+ text->mTextOverflow.mLeft.mString.Truncate();
+ } else if (eCSSUnit_String == textOverflowLeftValue->GetUnit()) {
+ textOverflowLeftValue->GetStringValue(text->mTextOverflow.mLeft.mString);
+ text->mTextOverflow.mLeft.mType = NS_STYLE_TEXT_OVERFLOW_STRING;
+ }
+
+ const nsCSSValue *textOverflowRightValue = &textOverflowValuePair.mYValue;
+ if (eCSSUnit_Enumerated == textOverflowRightValue->GetUnit()) {
+ SetValue(*textOverflowRightValue, text->mTextOverflow.mRight.mType,
+ conditions,
+ SETVAL_ENUMERATED, parentText->mTextOverflow.mRight.mType,
+ NS_STYLE_TEXT_OVERFLOW_CLIP);
+ text->mTextOverflow.mRight.mString.Truncate();
+ } else if (eCSSUnit_String == textOverflowRightValue->GetUnit()) {
+ textOverflowRightValue->GetStringValue(text->mTextOverflow.mRight.mString);
+ text->mTextOverflow.mRight.mType = NS_STYLE_TEXT_OVERFLOW_STRING;
+ }
+ }
+
+ // unicode-bidi: enum, inherit, initial
+ SetValue(*aRuleData->ValueForUnicodeBidi(), text->mUnicodeBidi, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentText->mUnicodeBidi,
+ NS_STYLE_UNICODE_BIDI_NORMAL);
+
+ // initial-letter: normal, number, array(number, integer?), initial
+ const nsCSSValue* initialLetterValue = aRuleData->ValueForInitialLetter();
+ if (initialLetterValue->GetUnit() == eCSSUnit_Null) {
+ // We don't want to change anything in this case.
+ } else if (initialLetterValue->GetUnit() == eCSSUnit_Inherit) {
+ conditions.SetUncacheable();
+ text->mInitialLetterSink = parentText->mInitialLetterSink;
+ text->mInitialLetterSize = parentText->mInitialLetterSize;
+ } else if (initialLetterValue->GetUnit() == eCSSUnit_Initial ||
+ initialLetterValue->GetUnit() == eCSSUnit_Unset ||
+ initialLetterValue->GetUnit() == eCSSUnit_Normal) {
+ // Use invalid values in initial-letter property to mean normal. So we can
+ // determine whether it is normal by checking mInitialLetterSink == 0.
+ text->mInitialLetterSink = 0;
+ text->mInitialLetterSize = 0.0f;
+ } else if (initialLetterValue->GetUnit() == eCSSUnit_Array) {
+ const nsCSSValue& firstValue = initialLetterValue->GetArrayValue()->Item(0);
+ const nsCSSValue& secondValue = initialLetterValue->GetArrayValue()->Item(1);
+ MOZ_ASSERT(firstValue.GetUnit() == eCSSUnit_Number &&
+ secondValue.GetUnit() == eCSSUnit_Integer,
+ "unexpected value unit");
+ text->mInitialLetterSize = firstValue.GetFloatValue();
+ text->mInitialLetterSink = secondValue.GetIntValue();
+ } else if (initialLetterValue->GetUnit() == eCSSUnit_Number) {
+ text->mInitialLetterSize = initialLetterValue->GetFloatValue();
+ text->mInitialLetterSink = NSToCoordFloorClamped(text->mInitialLetterSize);
+ } else {
+ MOZ_ASSERT_UNREACHABLE("unknown unit for initial-letter");
+ }
+
+ COMPUTE_END_RESET(TextReset, text)
+}
+
+const void*
+nsRuleNode::ComputeUserInterfaceData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_INHERITED(UserInterface, ui, parentUI)
+
+ // cursor: enum, url, inherit
+ const nsCSSValue* cursorValue = aRuleData->ValueForCursor();
+ nsCSSUnit cursorUnit = cursorValue->GetUnit();
+ if (cursorUnit != eCSSUnit_Null) {
+ ui->mCursorImages.Clear();
+
+ if (cursorUnit == eCSSUnit_Inherit ||
+ cursorUnit == eCSSUnit_Unset) {
+ conditions.SetUncacheable();
+ ui->mCursor = parentUI->mCursor;
+ ui->mCursorImages = parentUI->mCursorImages;
+ }
+ else if (cursorUnit == eCSSUnit_Initial) {
+ ui->mCursor = NS_STYLE_CURSOR_AUTO;
+ }
+ else {
+ // The parser will never create a list that is *all* URL values --
+ // that's invalid.
+ MOZ_ASSERT(cursorUnit == eCSSUnit_List || cursorUnit == eCSSUnit_ListDep,
+ "unrecognized cursor unit");
+ const nsCSSValueList* list = cursorValue->GetListValue();
+ for ( ; list->mValue.GetUnit() == eCSSUnit_Array; list = list->mNext) {
+ nsCSSValue::Array* arr = list->mValue.GetArrayValue();
+ imgRequestProxy* req =
+ GetImageRequest(aContext->PresContext(), arr->Item(0));
+ if (req) {
+ nsCursorImage* item = ui->mCursorImages.AppendElement();
+ item->SetImage(req);
+ if (arr->Item(1).GetUnit() != eCSSUnit_Null) {
+ item->mHaveHotspot = true;
+ item->mHotspotX = arr->Item(1).GetFloatValue();
+ item->mHotspotY = arr->Item(2).GetFloatValue();
+ }
+ }
+ }
+
+ NS_ASSERTION(list, "Must have non-array value at the end");
+ NS_ASSERTION(list->mValue.GetUnit() == eCSSUnit_Enumerated,
+ "Unexpected fallback value at end of cursor list");
+ ui->mCursor = list->mValue.GetIntValue();
+ }
+ }
+
+ // user-input: enum, inherit, initial
+ SetValue(*aRuleData->ValueForUserInput(),
+ ui->mUserInput, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentUI->mUserInput,
+ StyleUserInput::Auto);
+
+ // user-modify: enum, inherit, initial
+ SetValue(*aRuleData->ValueForUserModify(),
+ ui->mUserModify, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentUI->mUserModify,
+ StyleUserModify::ReadOnly);
+
+ // user-focus: enum, inherit, initial
+ SetValue(*aRuleData->ValueForUserFocus(),
+ ui->mUserFocus, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentUI->mUserFocus,
+ StyleUserFocus::None);
+
+ // pointer-events: enum, inherit, initial
+ SetValue(*aRuleData->ValueForPointerEvents(), ui->mPointerEvents,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentUI->mPointerEvents,
+ NS_STYLE_POINTER_EVENTS_AUTO);
+
+ COMPUTE_END_INHERITED(UserInterface, ui)
+}
+
+const void*
+nsRuleNode::ComputeUIResetData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(UIReset, ui, parentUI)
+
+ // user-select: enum, inherit, initial
+ SetValue(*aRuleData->ValueForUserSelect(),
+ ui->mUserSelect, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentUI->mUserSelect,
+ StyleUserSelect::Auto);
+
+ // ime-mode: enum, inherit, initial
+ SetValue(*aRuleData->ValueForImeMode(),
+ ui->mIMEMode, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentUI->mIMEMode,
+ NS_STYLE_IME_MODE_AUTO);
+
+ // force-broken-image-icons: integer, inherit, initial
+ SetValue(*aRuleData->ValueForForceBrokenImageIcon(),
+ ui->mForceBrokenImageIcon,
+ conditions,
+ SETVAL_INTEGER | SETVAL_UNSET_INITIAL,
+ parentUI->mForceBrokenImageIcon, 0);
+
+ // -moz-window-dragging: enum, inherit, initial
+ SetValue(*aRuleData->ValueForWindowDragging(),
+ ui->mWindowDragging, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentUI->mWindowDragging,
+ StyleWindowDragging::Default);
+
+ // -moz-window-shadow: enum, inherit, initial
+ SetValue(*aRuleData->ValueForWindowShadow(),
+ ui->mWindowShadow, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentUI->mWindowShadow,
+ NS_STYLE_WINDOW_SHADOW_DEFAULT);
+
+ COMPUTE_END_RESET(UIReset, ui)
+}
+
+// Information about each transition or animation property that is
+// constant.
+struct TransitionPropInfo {
+ nsCSSPropertyID property;
+ // Location of the count of the property's computed value.
+ uint32_t nsStyleDisplay::* sdCount;
+};
+
+// Each property's index in this array must match its index in the
+// mutable array |transitionPropData| below.
+static const TransitionPropInfo transitionPropInfo[4] = {
+ { eCSSProperty_transition_delay,
+ &nsStyleDisplay::mTransitionDelayCount },
+ { eCSSProperty_transition_duration,
+ &nsStyleDisplay::mTransitionDurationCount },
+ { eCSSProperty_transition_property,
+ &nsStyleDisplay::mTransitionPropertyCount },
+ { eCSSProperty_transition_timing_function,
+ &nsStyleDisplay::mTransitionTimingFunctionCount },
+};
+
+// Each property's index in this array must match its index in the
+// mutable array |animationPropData| below.
+static const TransitionPropInfo animationPropInfo[8] = {
+ { eCSSProperty_animation_delay,
+ &nsStyleDisplay::mAnimationDelayCount },
+ { eCSSProperty_animation_duration,
+ &nsStyleDisplay::mAnimationDurationCount },
+ { eCSSProperty_animation_name,
+ &nsStyleDisplay::mAnimationNameCount },
+ { eCSSProperty_animation_timing_function,
+ &nsStyleDisplay::mAnimationTimingFunctionCount },
+ { eCSSProperty_animation_direction,
+ &nsStyleDisplay::mAnimationDirectionCount },
+ { eCSSProperty_animation_fill_mode,
+ &nsStyleDisplay::mAnimationFillModeCount },
+ { eCSSProperty_animation_play_state,
+ &nsStyleDisplay::mAnimationPlayStateCount },
+ { eCSSProperty_animation_iteration_count,
+ &nsStyleDisplay::mAnimationIterationCountCount },
+};
+
+// Information about each transition or animation property that changes
+// during ComputeDisplayData.
+struct TransitionPropData {
+ const nsCSSValueList *list;
+ nsCSSUnit unit;
+ uint32_t num;
+};
+
+static uint32_t
+CountTransitionProps(const TransitionPropInfo* aInfo,
+ TransitionPropData* aData,
+ size_t aLength,
+ nsStyleDisplay* aDisplay,
+ const nsStyleDisplay* aParentDisplay,
+ const nsRuleData* aRuleData,
+ RuleNodeCacheConditions& aConditions)
+{
+ // The four transition properties or eight animation properties are
+ // stored in nsCSSDisplay in a single array for all properties. The
+ // number of transitions is equal to the number of items in the
+ // longest property's value. Properties that have fewer values than
+ // the longest are filled in by repeating the list. However, this
+ // repetition does not extend the computed value of that particular
+ // property (for purposes of inheritance, or, in our code, for when
+ // other properties are overridden by a more specific rule).
+
+ // But actually, since the spec isn't clear yet, we'll fully compute
+ // all of them (so we can switch easily later), but only care about
+ // the ones up to the number of items for 'transition-property', per
+ // http://lists.w3.org/Archives/Public/www-style/2009Aug/0109.html .
+
+ // Transitions are difficult to handle correctly because of this. For
+ // example, we need to handle scenarios such as:
+ // * a more general rule specifies transition-property: a, b, c;
+ // * a more specific rule overrides as transition-property: d;
+ //
+ // If only the general rule applied, we would fill in the extra
+ // properties (duration, delay, etc) with initial values to create 3
+ // fully-specified transitions. But when the more specific rule
+ // applies, we should only create a single transition. In order to do
+ // this we need to remember which properties were explicitly specified
+ // and which ones were just filled in with initial values to get a
+ // fully-specified transition, which we do by remembering the number
+ // of values for each property.
+
+ uint32_t numTransitions = 0;
+ for (size_t i = 0; i < aLength; ++i) {
+ const TransitionPropInfo& info = aInfo[i];
+ TransitionPropData& data = aData[i];
+
+ // cache whether any of the properties are specified as 'inherit' so
+ // we can use it below
+
+ const nsCSSValue& value = *aRuleData->ValueFor(info.property);
+ data.unit = value.GetUnit();
+ data.list = (value.GetUnit() == eCSSUnit_List ||
+ value.GetUnit() == eCSSUnit_ListDep)
+ ? value.GetListValue() : nullptr;
+
+ // General algorithm to determine how many total transitions we need
+ // to build. For each property:
+ // - if there is no value specified in for the property in
+ // displayData, use the values from the start struct, but only if
+ // they were explicitly specified
+ // - if there is a value specified for the property in displayData:
+ // - if the value is 'inherit', count the number of values for
+ // that property are specified by the parent, but only those
+ // that were explicitly specified
+ // - otherwise, count the number of values specified in displayData
+
+
+ // calculate number of elements
+ if (data.unit == eCSSUnit_Inherit) {
+ data.num = aParentDisplay->*(info.sdCount);
+ aConditions.SetUncacheable();
+ } else if (data.list) {
+ data.num = ListLength(data.list);
+ } else {
+ data.num = aDisplay->*(info.sdCount);
+ }
+ if (data.num > numTransitions)
+ numTransitions = data.num;
+ }
+
+ return numTransitions;
+}
+
+/* static */ void
+nsRuleNode::ComputeTimingFunction(const nsCSSValue& aValue,
+ nsTimingFunction& aResult)
+{
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Enumerated:
+ aResult = nsTimingFunction(aValue.GetIntValue());
+ break;
+ case eCSSUnit_Cubic_Bezier:
+ {
+ nsCSSValue::Array* array = aValue.GetArrayValue();
+ NS_ASSERTION(array && array->Count() == 4,
+ "Need 4 control points");
+ aResult = nsTimingFunction(array->Item(0).GetFloatValue(),
+ array->Item(1).GetFloatValue(),
+ array->Item(2).GetFloatValue(),
+ array->Item(3).GetFloatValue());
+ }
+ break;
+ case eCSSUnit_Steps:
+ {
+ nsCSSValue::Array* array = aValue.GetArrayValue();
+ NS_ASSERTION(array && array->Count() == 2,
+ "Need 2 items");
+ NS_ASSERTION(array->Item(0).GetUnit() == eCSSUnit_Integer,
+ "unexpected first value");
+ NS_ASSERTION(array->Item(1).GetUnit() == eCSSUnit_Enumerated &&
+ (array->Item(1).GetIntValue() ==
+ NS_STYLE_TRANSITION_TIMING_FUNCTION_STEP_START ||
+ array->Item(1).GetIntValue() ==
+ NS_STYLE_TRANSITION_TIMING_FUNCTION_STEP_END ||
+ array->Item(1).GetIntValue() == -1),
+ "unexpected second value");
+ nsTimingFunction::Type type =
+ (array->Item(1).GetIntValue() ==
+ NS_STYLE_TRANSITION_TIMING_FUNCTION_STEP_START) ?
+ nsTimingFunction::Type::StepStart :
+ nsTimingFunction::Type::StepEnd;
+ aResult = nsTimingFunction(type, array->Item(0).GetIntValue());
+ }
+ break;
+ default:
+ NS_NOTREACHED("Invalid transition property unit");
+ }
+}
+
+static uint8_t
+GetWillChangeBitFieldFromPropFlags(const nsCSSPropertyID& aProp)
+{
+ uint8_t willChangeBitField = 0;
+ if (nsCSSProps::PropHasFlags(aProp, CSS_PROPERTY_CREATES_STACKING_CONTEXT)) {
+ willChangeBitField |= NS_STYLE_WILL_CHANGE_STACKING_CONTEXT;
+ }
+
+ if (nsCSSProps::PropHasFlags(aProp, CSS_PROPERTY_FIXPOS_CB)) {
+ willChangeBitField |= NS_STYLE_WILL_CHANGE_FIXPOS_CB;
+ }
+
+ if (nsCSSProps::PropHasFlags(aProp, CSS_PROPERTY_ABSPOS_CB)) {
+ willChangeBitField |= NS_STYLE_WILL_CHANGE_ABSPOS_CB;
+ }
+
+ return willChangeBitField;
+}
+
+const void*
+nsRuleNode::ComputeDisplayData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(Display, display, parentDisplay)
+
+ // We may have ended up with aStartStruct's values of mDisplay and
+ // mFloat, but those may not be correct if our style data overrides
+ // its position or float properties. Reset to mOriginalDisplay and
+ // mOriginalFloat; if it turns out we still need the display/floats
+ // adjustments, we'll do them below.
+ display->mDisplay = display->mOriginalDisplay;
+ display->mFloat = display->mOriginalFloat;
+
+ // Each property's index in this array must match its index in the
+ // const array |transitionPropInfo| above.
+ TransitionPropData transitionPropData[4];
+ TransitionPropData& delay = transitionPropData[0];
+ TransitionPropData& duration = transitionPropData[1];
+ TransitionPropData& property = transitionPropData[2];
+ TransitionPropData& timingFunction = transitionPropData[3];
+
+#define FOR_ALL_TRANSITION_PROPS(var_) \
+ for (uint32_t var_ = 0; var_ < 4; ++var_)
+
+ // CSS Transitions
+ uint32_t numTransitions =
+ CountTransitionProps(transitionPropInfo, transitionPropData,
+ ArrayLength(transitionPropData),
+ display, parentDisplay, aRuleData,
+ conditions);
+
+ display->mTransitions.SetLengthNonZero(numTransitions);
+
+ FOR_ALL_TRANSITION_PROPS(p) {
+ const TransitionPropInfo& i = transitionPropInfo[p];
+ TransitionPropData& d = transitionPropData[p];
+
+ display->*(i.sdCount) = d.num;
+ }
+
+ // Fill in the transitions we just allocated with the appropriate values.
+ for (uint32_t i = 0; i < numTransitions; ++i) {
+ StyleTransition *transition = &display->mTransitions[i];
+
+ if (i >= delay.num) {
+ MOZ_ASSERT(delay.num, "delay.num must be greater than 0");
+ transition->SetDelay(display->mTransitions[i % delay.num].GetDelay());
+ } else if (delay.unit == eCSSUnit_Inherit) {
+ // FIXME (Bug 522599) (for all transition properties): write a test that
+ // detects when this was wrong for i >= delay.num if parent had
+ // count for this property not equal to length
+ MOZ_ASSERT(i < parentDisplay->mTransitionDelayCount,
+ "delay.num computed incorrectly");
+ MOZ_ASSERT(!conditions.Cacheable(),
+ "should have made conditions.Cacheable() false above");
+ transition->SetDelay(parentDisplay->mTransitions[i].GetDelay());
+ } else if (delay.unit == eCSSUnit_Initial ||
+ delay.unit == eCSSUnit_Unset) {
+ transition->SetDelay(0.0);
+ } else if (delay.list) {
+ switch (delay.list->mValue.GetUnit()) {
+ case eCSSUnit_Seconds:
+ transition->SetDelay(PR_MSEC_PER_SEC *
+ delay.list->mValue.GetFloatValue());
+ break;
+ case eCSSUnit_Milliseconds:
+ transition->SetDelay(delay.list->mValue.GetFloatValue());
+ break;
+ default:
+ NS_NOTREACHED("Invalid delay unit");
+ }
+ }
+
+ if (i >= duration.num) {
+ MOZ_ASSERT(duration.num, "duration.num must be greater than 0");
+ transition->SetDuration(
+ display->mTransitions[i % duration.num].GetDuration());
+ } else if (duration.unit == eCSSUnit_Inherit) {
+ MOZ_ASSERT(i < parentDisplay->mTransitionDurationCount,
+ "duration.num computed incorrectly");
+ MOZ_ASSERT(!conditions.Cacheable(),
+ "should have made conditions.Cacheable() false above");
+ transition->SetDuration(parentDisplay->mTransitions[i].GetDuration());
+ } else if (duration.unit == eCSSUnit_Initial ||
+ duration.unit == eCSSUnit_Unset) {
+ transition->SetDuration(0.0);
+ } else if (duration.list) {
+ switch (duration.list->mValue.GetUnit()) {
+ case eCSSUnit_Seconds:
+ transition->SetDuration(PR_MSEC_PER_SEC *
+ duration.list->mValue.GetFloatValue());
+ break;
+ case eCSSUnit_Milliseconds:
+ transition->SetDuration(duration.list->mValue.GetFloatValue());
+ break;
+ default:
+ NS_NOTREACHED("Invalid duration unit");
+ }
+ }
+
+ if (i >= property.num) {
+ MOZ_ASSERT(property.num, "property.num must be greater than 0");
+ transition->CopyPropertyFrom(display->mTransitions[i % property.num]);
+ } else if (property.unit == eCSSUnit_Inherit) {
+ MOZ_ASSERT(i < parentDisplay->mTransitionPropertyCount,
+ "property.num computed incorrectly");
+ MOZ_ASSERT(!conditions.Cacheable(),
+ "should have made conditions.Cacheable() false above");
+ transition->CopyPropertyFrom(parentDisplay->mTransitions[i]);
+ } else if (property.unit == eCSSUnit_Initial ||
+ property.unit == eCSSUnit_Unset) {
+ transition->SetProperty(eCSSPropertyExtra_all_properties);
+ } else if (property.unit == eCSSUnit_None) {
+ transition->SetProperty(eCSSPropertyExtra_no_properties);
+ } else if (property.list) {
+ const nsCSSValue &val = property.list->mValue;
+
+ if (val.GetUnit() == eCSSUnit_Ident) {
+ nsDependentString
+ propertyStr(property.list->mValue.GetStringBufferValue());
+ nsCSSPropertyID prop =
+ nsCSSProps::LookupProperty(propertyStr,
+ CSSEnabledState::eForAllContent);
+ if (prop == eCSSProperty_UNKNOWN ||
+ prop == eCSSPropertyExtra_variable) {
+ transition->SetUnknownProperty(prop, propertyStr);
+ } else {
+ transition->SetProperty(prop);
+ }
+ } else {
+ MOZ_ASSERT(val.GetUnit() == eCSSUnit_All,
+ "Invalid transition property unit");
+ transition->SetProperty(eCSSPropertyExtra_all_properties);
+ }
+ }
+
+ if (i >= timingFunction.num) {
+ MOZ_ASSERT(timingFunction.num,
+ "timingFunction.num must be greater than 0");
+ transition->SetTimingFunction(
+ display->mTransitions[i % timingFunction.num].GetTimingFunction());
+ } else if (timingFunction.unit == eCSSUnit_Inherit) {
+ MOZ_ASSERT(i < parentDisplay->mTransitionTimingFunctionCount,
+ "timingFunction.num computed incorrectly");
+ MOZ_ASSERT(!conditions.Cacheable(),
+ "should have made conditions.Cacheable() false above");
+ transition->SetTimingFunction(
+ parentDisplay->mTransitions[i].GetTimingFunction());
+ } else if (timingFunction.unit == eCSSUnit_Initial ||
+ timingFunction.unit == eCSSUnit_Unset) {
+ transition->SetTimingFunction(
+ nsTimingFunction(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE));
+ } else if (timingFunction.list) {
+ ComputeTimingFunction(timingFunction.list->mValue,
+ transition->TimingFunctionSlot());
+ }
+
+ FOR_ALL_TRANSITION_PROPS(p) {
+ const TransitionPropInfo& info = transitionPropInfo[p];
+ TransitionPropData& d = transitionPropData[p];
+
+ // if we're at the end of the list, start at the beginning and repeat
+ // until we're out of transitions to populate
+ if (d.list) {
+ d.list = d.list->mNext ? d.list->mNext :
+ aRuleData->ValueFor(info.property)->GetListValue();
+ }
+ }
+ }
+
+ // Each property's index in this array must match its index in the
+ // const array |animationPropInfo| above.
+ TransitionPropData animationPropData[8];
+ TransitionPropData& animDelay = animationPropData[0];
+ TransitionPropData& animDuration = animationPropData[1];
+ TransitionPropData& animName = animationPropData[2];
+ TransitionPropData& animTimingFunction = animationPropData[3];
+ TransitionPropData& animDirection = animationPropData[4];
+ TransitionPropData& animFillMode = animationPropData[5];
+ TransitionPropData& animPlayState = animationPropData[6];
+ TransitionPropData& animIterationCount = animationPropData[7];
+
+#define FOR_ALL_ANIMATION_PROPS(var_) \
+ for (uint32_t var_ = 0; var_ < 8; ++var_)
+
+ // CSS Animations.
+
+ uint32_t numAnimations =
+ CountTransitionProps(animationPropInfo, animationPropData,
+ ArrayLength(animationPropData),
+ display, parentDisplay, aRuleData,
+ conditions);
+
+ display->mAnimations.SetLengthNonZero(numAnimations);
+
+ FOR_ALL_ANIMATION_PROPS(p) {
+ const TransitionPropInfo& i = animationPropInfo[p];
+ TransitionPropData& d = animationPropData[p];
+
+ display->*(i.sdCount) = d.num;
+ }
+
+ // Fill in the animations we just allocated with the appropriate values.
+ for (uint32_t i = 0; i < numAnimations; ++i) {
+ StyleAnimation *animation = &display->mAnimations[i];
+
+ if (i >= animDelay.num) {
+ MOZ_ASSERT(animDelay.num, "animDelay.num must be greater than 0");
+ animation->SetDelay(display->mAnimations[i % animDelay.num].GetDelay());
+ } else if (animDelay.unit == eCSSUnit_Inherit) {
+ // FIXME (Bug 522599) (for all animation properties): write a test that
+ // detects when this was wrong for i >= animDelay.num if parent had
+ // count for this property not equal to length
+ MOZ_ASSERT(i < parentDisplay->mAnimationDelayCount,
+ "animDelay.num computed incorrectly");
+ MOZ_ASSERT(!conditions.Cacheable(),
+ "should have made conditions.Cacheable() false above");
+ animation->SetDelay(parentDisplay->mAnimations[i].GetDelay());
+ } else if (animDelay.unit == eCSSUnit_Initial ||
+ animDelay.unit == eCSSUnit_Unset) {
+ animation->SetDelay(0.0);
+ } else if (animDelay.list) {
+ switch (animDelay.list->mValue.GetUnit()) {
+ case eCSSUnit_Seconds:
+ animation->SetDelay(PR_MSEC_PER_SEC *
+ animDelay.list->mValue.GetFloatValue());
+ break;
+ case eCSSUnit_Milliseconds:
+ animation->SetDelay(animDelay.list->mValue.GetFloatValue());
+ break;
+ default:
+ NS_NOTREACHED("Invalid delay unit");
+ }
+ }
+
+ if (i >= animDuration.num) {
+ MOZ_ASSERT(animDuration.num, "animDuration.num must be greater than 0");
+ animation->SetDuration(
+ display->mAnimations[i % animDuration.num].GetDuration());
+ } else if (animDuration.unit == eCSSUnit_Inherit) {
+ MOZ_ASSERT(i < parentDisplay->mAnimationDurationCount,
+ "animDuration.num computed incorrectly");
+ MOZ_ASSERT(!conditions.Cacheable(),
+ "should have made conditions.Cacheable() false above");
+ animation->SetDuration(parentDisplay->mAnimations[i].GetDuration());
+ } else if (animDuration.unit == eCSSUnit_Initial ||
+ animDuration.unit == eCSSUnit_Unset) {
+ animation->SetDuration(0.0);
+ } else if (animDuration.list) {
+ switch (animDuration.list->mValue.GetUnit()) {
+ case eCSSUnit_Seconds:
+ animation->SetDuration(PR_MSEC_PER_SEC *
+ animDuration.list->mValue.GetFloatValue());
+ break;
+ case eCSSUnit_Milliseconds:
+ animation->SetDuration(animDuration.list->mValue.GetFloatValue());
+ break;
+ default:
+ NS_NOTREACHED("Invalid duration unit");
+ }
+ }
+
+ if (i >= animName.num) {
+ MOZ_ASSERT(animName.num, "animName.num must be greater than 0");
+ animation->SetName(display->mAnimations[i % animName.num].GetName());
+ } else if (animName.unit == eCSSUnit_Inherit) {
+ MOZ_ASSERT(i < parentDisplay->mAnimationNameCount,
+ "animName.num computed incorrectly");
+ MOZ_ASSERT(!conditions.Cacheable(),
+ "should have made conditions.Cacheable() false above");
+ animation->SetName(parentDisplay->mAnimations[i].GetName());
+ } else if (animName.unit == eCSSUnit_Initial ||
+ animName.unit == eCSSUnit_Unset) {
+ animation->SetName(EmptyString());
+ } else if (animName.list) {
+ switch (animName.list->mValue.GetUnit()) {
+ case eCSSUnit_Ident: {
+ nsDependentString
+ nameStr(animName.list->mValue.GetStringBufferValue());
+ animation->SetName(nameStr);
+ break;
+ }
+ case eCSSUnit_None: {
+ animation->SetName(EmptyString());
+ break;
+ }
+ default:
+ MOZ_ASSERT(false, "Invalid animation-name unit");
+ }
+ }
+
+ if (i >= animTimingFunction.num) {
+ MOZ_ASSERT(animTimingFunction.num,
+ "animTimingFunction.num must be greater than 0");
+ animation->SetTimingFunction(
+ display->mAnimations[i % animTimingFunction.num].GetTimingFunction());
+ } else if (animTimingFunction.unit == eCSSUnit_Inherit) {
+ MOZ_ASSERT(i < parentDisplay->mAnimationTimingFunctionCount,
+ "animTimingFunction.num computed incorrectly");
+ MOZ_ASSERT(!conditions.Cacheable(),
+ "should have made conditions.Cacheable() false above");
+ animation->SetTimingFunction(
+ parentDisplay->mAnimations[i].GetTimingFunction());
+ } else if (animTimingFunction.unit == eCSSUnit_Initial ||
+ animTimingFunction.unit == eCSSUnit_Unset) {
+ animation->SetTimingFunction(
+ nsTimingFunction(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE));
+ } else if (animTimingFunction.list) {
+ ComputeTimingFunction(animTimingFunction.list->mValue,
+ animation->TimingFunctionSlot());
+ }
+
+ if (i >= animDirection.num) {
+ MOZ_ASSERT(animDirection.num,
+ "animDirection.num must be greater than 0");
+ animation->SetDirection(display->mAnimations[i % animDirection.num].GetDirection());
+ } else if (animDirection.unit == eCSSUnit_Inherit) {
+ MOZ_ASSERT(i < parentDisplay->mAnimationDirectionCount,
+ "animDirection.num computed incorrectly");
+ MOZ_ASSERT(!conditions.Cacheable(),
+ "should have made conditions.Cacheable() false above");
+ animation->SetDirection(parentDisplay->mAnimations[i].GetDirection());
+ } else if (animDirection.unit == eCSSUnit_Initial ||
+ animDirection.unit == eCSSUnit_Unset) {
+ animation->SetDirection(dom::PlaybackDirection::Normal);
+ } else if (animDirection.list) {
+ MOZ_ASSERT(animDirection.list->mValue.GetUnit() == eCSSUnit_Enumerated,
+ "Invalid animation-direction unit");
+
+ animation->SetDirection(
+ static_cast<dom::PlaybackDirection>(animDirection.list->mValue.GetIntValue()));
+ }
+
+ if (i >= animFillMode.num) {
+ MOZ_ASSERT(animFillMode.num, "animFillMode.num must be greater than 0");
+ animation->SetFillMode(display->mAnimations[i % animFillMode.num].GetFillMode());
+ } else if (animFillMode.unit == eCSSUnit_Inherit) {
+ MOZ_ASSERT(i < parentDisplay->mAnimationFillModeCount,
+ "animFillMode.num computed incorrectly");
+ MOZ_ASSERT(!conditions.Cacheable(),
+ "should have made conditions.Cacheable() false above");
+ animation->SetFillMode(parentDisplay->mAnimations[i].GetFillMode());
+ } else if (animFillMode.unit == eCSSUnit_Initial ||
+ animFillMode.unit == eCSSUnit_Unset) {
+ animation->SetFillMode(dom::FillMode::None);
+ } else if (animFillMode.list) {
+ MOZ_ASSERT(animFillMode.list->mValue.GetUnit() == eCSSUnit_Enumerated,
+ "Invalid animation-fill-mode unit");
+
+ animation->SetFillMode(
+ static_cast<dom::FillMode>(animFillMode.list->mValue.GetIntValue()));
+ }
+
+ if (i >= animPlayState.num) {
+ MOZ_ASSERT(animPlayState.num,
+ "animPlayState.num must be greater than 0");
+ animation->SetPlayState(display->mAnimations[i % animPlayState.num].GetPlayState());
+ } else if (animPlayState.unit == eCSSUnit_Inherit) {
+ MOZ_ASSERT(i < parentDisplay->mAnimationPlayStateCount,
+ "animPlayState.num computed incorrectly");
+ MOZ_ASSERT(!conditions.Cacheable(),
+ "should have made conditions.Cacheable() false above");
+ animation->SetPlayState(parentDisplay->mAnimations[i].GetPlayState());
+ } else if (animPlayState.unit == eCSSUnit_Initial ||
+ animPlayState.unit == eCSSUnit_Unset) {
+ animation->SetPlayState(NS_STYLE_ANIMATION_PLAY_STATE_RUNNING);
+ } else if (animPlayState.list) {
+ MOZ_ASSERT(animPlayState.list->mValue.GetUnit() == eCSSUnit_Enumerated,
+ "Invalid animation-play-state unit");
+
+ animation->SetPlayState(animPlayState.list->mValue.GetIntValue());
+ }
+
+ if (i >= animIterationCount.num) {
+ MOZ_ASSERT(animIterationCount.num,
+ "animIterationCount.num must be greater than 0");
+ animation->SetIterationCount(display->mAnimations[i % animIterationCount.num].GetIterationCount());
+ } else if (animIterationCount.unit == eCSSUnit_Inherit) {
+ MOZ_ASSERT(i < parentDisplay->mAnimationIterationCountCount,
+ "animIterationCount.num computed incorrectly");
+ MOZ_ASSERT(!conditions.Cacheable(),
+ "should have made conditions.Cacheable() false above");
+ animation->SetIterationCount(parentDisplay->mAnimations[i].GetIterationCount());
+ } else if (animIterationCount.unit == eCSSUnit_Initial ||
+ animIterationCount.unit == eCSSUnit_Unset) {
+ animation->SetIterationCount(1.0f);
+ } else if (animIterationCount.list) {
+ switch (animIterationCount.list->mValue.GetUnit()) {
+ case eCSSUnit_Enumerated:
+ MOZ_ASSERT(animIterationCount.list->mValue.GetIntValue() ==
+ NS_STYLE_ANIMATION_ITERATION_COUNT_INFINITE,
+ "unexpected value");
+ animation->SetIterationCount(NS_IEEEPositiveInfinity());
+ break;
+ case eCSSUnit_Number:
+ animation->SetIterationCount(
+ animIterationCount.list->mValue.GetFloatValue());
+ break;
+ default:
+ MOZ_ASSERT(false,
+ "unexpected animation-iteration-count unit");
+ }
+ }
+
+ FOR_ALL_ANIMATION_PROPS(p) {
+ const TransitionPropInfo& info = animationPropInfo[p];
+ TransitionPropData& d = animationPropData[p];
+
+ // if we're at the end of the list, start at the beginning and repeat
+ // until we're out of animations to populate
+ if (d.list) {
+ d.list = d.list->mNext ? d.list->mNext :
+ aRuleData->ValueFor(info.property)->GetListValue();
+ }
+ }
+ }
+
+ // display: enum, inherit, initial
+ SetValue(*aRuleData->ValueForDisplay(), display->mDisplay, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mDisplay,
+ StyleDisplay::Inline);
+
+ // contain: none, enum, inherit, initial
+ SetValue(*aRuleData->ValueForContain(), display->mContain, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mContain,
+ NS_STYLE_CONTAIN_NONE, Unused,
+ NS_STYLE_CONTAIN_NONE, Unused, Unused);
+
+ // scroll-behavior: enum, inherit, initial
+ SetValue(*aRuleData->ValueForScrollBehavior(), display->mScrollBehavior,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mScrollBehavior, NS_STYLE_SCROLL_BEHAVIOR_AUTO);
+
+ // scroll-snap-type-x: none, enum, inherit, initial
+ SetValue(*aRuleData->ValueForScrollSnapTypeX(), display->mScrollSnapTypeX,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mScrollSnapTypeX, NS_STYLE_SCROLL_SNAP_TYPE_NONE);
+
+ // scroll-snap-type-y: none, enum, inherit, initial
+ SetValue(*aRuleData->ValueForScrollSnapTypeY(), display->mScrollSnapTypeY,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mScrollSnapTypeY, NS_STYLE_SCROLL_SNAP_TYPE_NONE);
+
+ // scroll-snap-points-x: none, inherit, initial
+ const nsCSSValue& scrollSnapPointsX = *aRuleData->ValueForScrollSnapPointsX();
+ switch (scrollSnapPointsX.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ case eCSSUnit_None:
+ display->mScrollSnapPointsX.SetNoneValue();
+ break;
+ case eCSSUnit_Inherit:
+ display->mScrollSnapPointsX = parentDisplay->mScrollSnapPointsX;
+ conditions.SetUncacheable();
+ break;
+ case eCSSUnit_Function: {
+ nsCSSValue::Array* func = scrollSnapPointsX.GetArrayValue();
+ NS_ASSERTION(func->Item(0).GetKeywordValue() == eCSSKeyword_repeat,
+ "Expected repeat(), got another function name");
+ nsStyleCoord coord;
+ if (SetCoord(func->Item(1), coord, nsStyleCoord(),
+ SETCOORD_LP | SETCOORD_STORE_CALC |
+ SETCOORD_CALC_CLAMP_NONNEGATIVE,
+ aContext, mPresContext, conditions)) {
+ NS_ASSERTION(coord.GetUnit() == eStyleUnit_Coord ||
+ coord.GetUnit() == eStyleUnit_Percent ||
+ coord.GetUnit() == eStyleUnit_Calc,
+ "unexpected unit");
+ display->mScrollSnapPointsX = coord;
+ }
+ break;
+ }
+ default:
+ NS_NOTREACHED("unexpected unit");
+ }
+
+ // scroll-snap-points-y: none, inherit, initial
+ const nsCSSValue& scrollSnapPointsY = *aRuleData->ValueForScrollSnapPointsY();
+ switch (scrollSnapPointsY.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ case eCSSUnit_None:
+ display->mScrollSnapPointsY.SetNoneValue();
+ break;
+ case eCSSUnit_Inherit:
+ display->mScrollSnapPointsY = parentDisplay->mScrollSnapPointsY;
+ conditions.SetUncacheable();
+ break;
+ case eCSSUnit_Function: {
+ nsCSSValue::Array* func = scrollSnapPointsY.GetArrayValue();
+ NS_ASSERTION(func->Item(0).GetKeywordValue() == eCSSKeyword_repeat,
+ "Expected repeat(), got another function name");
+ nsStyleCoord coord;
+ if (SetCoord(func->Item(1), coord, nsStyleCoord(),
+ SETCOORD_LP | SETCOORD_STORE_CALC |
+ SETCOORD_CALC_CLAMP_NONNEGATIVE,
+ aContext, mPresContext, conditions)) {
+ NS_ASSERTION(coord.GetUnit() == eStyleUnit_Coord ||
+ coord.GetUnit() == eStyleUnit_Percent ||
+ coord.GetUnit() == eStyleUnit_Calc,
+ "unexpected unit");
+ display->mScrollSnapPointsY = coord;
+ }
+ break;
+ }
+ default:
+ NS_NOTREACHED("unexpected unit");
+ }
+
+ // scroll-snap-destination: inherit, initial
+ const nsCSSValue& snapDestination = *aRuleData->ValueForScrollSnapDestination();
+ switch (snapDestination.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ display->mScrollSnapDestination.SetInitialZeroValues();
+ break;
+ case eCSSUnit_Inherit:
+ display->mScrollSnapDestination = parentDisplay->mScrollSnapDestination;
+ conditions.SetUncacheable();
+ break;
+ default: {
+ ComputePositionValue(aContext, snapDestination,
+ display->mScrollSnapDestination, conditions);
+ }
+ }
+
+ // scroll-snap-coordinate: none, inherit, initial
+ const nsCSSValue& snapCoordinate = *aRuleData->ValueForScrollSnapCoordinate();
+ switch (snapCoordinate.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ case eCSSUnit_None:
+ // Unset and Initial is none, indicated by an empty array
+ display->mScrollSnapCoordinate.Clear();
+ break;
+ case eCSSUnit_Inherit:
+ display->mScrollSnapCoordinate = parentDisplay->mScrollSnapCoordinate;
+ conditions.SetUncacheable();
+ break;
+ case eCSSUnit_List: {
+ display->mScrollSnapCoordinate.Clear();
+ const nsCSSValueList* item = snapCoordinate.GetListValue();
+ do {
+ NS_ASSERTION(item->mValue.GetUnit() != eCSSUnit_Null &&
+ item->mValue.GetUnit() != eCSSUnit_Inherit &&
+ item->mValue.GetUnit() != eCSSUnit_Initial &&
+ item->mValue.GetUnit() != eCSSUnit_Unset,
+ "unexpected unit");
+ Position* pos = display->mScrollSnapCoordinate.AppendElement();
+ ComputePositionValue(aContext, item->mValue, *pos, conditions);
+ item = item->mNext;
+ } while(item);
+ break;
+ }
+ default:
+ NS_NOTREACHED("unexpected unit");
+ }
+
+ // isolation: enum, inherit, initial
+ SetValue(*aRuleData->ValueForIsolation(), display->mIsolation,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mIsolation, NS_STYLE_ISOLATION_AUTO);
+
+ // -moz-top-layer: enum, inherit, initial
+ SetValue(*aRuleData->ValueForTopLayer(), display->mTopLayer,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mTopLayer, NS_STYLE_TOP_LAYER_NONE);
+
+ // Backup original display value for calculation of a hypothetical
+ // box (CSS2 10.6.4/10.6.5), in addition to getting our style data right later.
+ // See ReflowInput::CalculateHypotheticalBox
+ display->mOriginalDisplay = display->mDisplay;
+
+ // appearance: enum, inherit, initial
+ SetValue(*aRuleData->ValueForAppearance(),
+ display->mAppearance, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mAppearance,
+ NS_THEME_NONE);
+
+ // binding: url, none, inherit
+ const nsCSSValue* bindingValue = aRuleData->ValueForBinding();
+ if (eCSSUnit_URL == bindingValue->GetUnit()) {
+ mozilla::css::URLValue* url = bindingValue->GetURLStructValue();
+ NS_ASSERTION(url, "What's going on here?");
+
+ if (MOZ_LIKELY(url->GetURI())) {
+ display->mBinding = url;
+ } else {
+ display->mBinding = nullptr;
+ }
+ }
+ else if (eCSSUnit_None == bindingValue->GetUnit() ||
+ eCSSUnit_Initial == bindingValue->GetUnit() ||
+ eCSSUnit_Unset == bindingValue->GetUnit()) {
+ display->mBinding = nullptr;
+ }
+ else if (eCSSUnit_Inherit == bindingValue->GetUnit()) {
+ conditions.SetUncacheable();
+ display->mBinding = parentDisplay->mBinding;
+ }
+
+ // position: enum, inherit, initial
+ SetValue(*aRuleData->ValueForPosition(), display->mPosition, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mPosition,
+ NS_STYLE_POSITION_STATIC);
+ // If an element is put in the top layer, while it is not absolutely
+ // positioned, the position value should be computed to 'absolute' per
+ // the Fullscreen API spec.
+ if (display->mTopLayer != NS_STYLE_TOP_LAYER_NONE &&
+ !display->IsAbsolutelyPositionedStyle()) {
+ display->mPosition = NS_STYLE_POSITION_ABSOLUTE;
+ // We cannot cache this struct because otherwise it may be used as
+ // an aStartStruct for some other elements.
+ conditions.SetUncacheable();
+ }
+
+ // clear: enum, inherit, initial
+ SetValue(*aRuleData->ValueForClear(), display->mBreakType, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mBreakType,
+ StyleClear::None);
+
+ // temp fix for bug 24000
+ // Map 'auto' and 'avoid' to false, and 'always', 'left', and
+ // 'right' to true.
+ // "A conforming user agent may interpret the values 'left' and
+ // 'right' as 'always'." - CSS2.1, section 13.3.1
+ const nsCSSValue* breakBeforeValue = aRuleData->ValueForPageBreakBefore();
+ if (eCSSUnit_Enumerated == breakBeforeValue->GetUnit()) {
+ display->mBreakBefore =
+ (NS_STYLE_PAGE_BREAK_AVOID != breakBeforeValue->GetIntValue() &&
+ NS_STYLE_PAGE_BREAK_AUTO != breakBeforeValue->GetIntValue());
+ }
+ else if (eCSSUnit_Initial == breakBeforeValue->GetUnit() ||
+ eCSSUnit_Unset == breakBeforeValue->GetUnit()) {
+ display->mBreakBefore = false;
+ }
+ else if (eCSSUnit_Inherit == breakBeforeValue->GetUnit()) {
+ conditions.SetUncacheable();
+ display->mBreakBefore = parentDisplay->mBreakBefore;
+ }
+
+ const nsCSSValue* breakAfterValue = aRuleData->ValueForPageBreakAfter();
+ if (eCSSUnit_Enumerated == breakAfterValue->GetUnit()) {
+ display->mBreakAfter =
+ (NS_STYLE_PAGE_BREAK_AVOID != breakAfterValue->GetIntValue() &&
+ NS_STYLE_PAGE_BREAK_AUTO != breakAfterValue->GetIntValue());
+ }
+ else if (eCSSUnit_Initial == breakAfterValue->GetUnit() ||
+ eCSSUnit_Unset == breakAfterValue->GetUnit()) {
+ display->mBreakAfter = false;
+ }
+ else if (eCSSUnit_Inherit == breakAfterValue->GetUnit()) {
+ conditions.SetUncacheable();
+ display->mBreakAfter = parentDisplay->mBreakAfter;
+ }
+ // end temp fix
+
+ // page-break-inside: enum, inherit, initial
+ SetValue(*aRuleData->ValueForPageBreakInside(),
+ display->mBreakInside, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mBreakInside,
+ NS_STYLE_PAGE_BREAK_AUTO);
+
+ // touch-action: none, auto, enum, inherit, initial
+ SetValue(*aRuleData->ValueForTouchAction(), display->mTouchAction,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mTouchAction,
+ /* initial */ NS_STYLE_TOUCH_ACTION_AUTO,
+ /* auto */ NS_STYLE_TOUCH_ACTION_AUTO,
+ /* none */ NS_STYLE_TOUCH_ACTION_NONE, Unused, Unused);
+
+ // float: enum, inherit, initial
+ SetValue(*aRuleData->ValueForFloat(),
+ display->mFloat, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mFloat,
+ StyleFloat::None);
+ // Save mFloat in mOriginalFloat in case we need it later
+ display->mOriginalFloat = display->mFloat;
+
+ // overflow-x: enum, inherit, initial
+ SetValue(*aRuleData->ValueForOverflowX(),
+ display->mOverflowX, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mOverflowX,
+ NS_STYLE_OVERFLOW_VISIBLE);
+
+ // overflow-y: enum, inherit, initial
+ SetValue(*aRuleData->ValueForOverflowY(),
+ display->mOverflowY, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mOverflowY,
+ NS_STYLE_OVERFLOW_VISIBLE);
+
+ // CSS3 overflow-x and overflow-y require some fixup as well in some
+ // cases. NS_STYLE_OVERFLOW_VISIBLE and NS_STYLE_OVERFLOW_CLIP are
+ // meaningful only when used in both dimensions.
+ if (display->mOverflowX != display->mOverflowY &&
+ (display->mOverflowX == NS_STYLE_OVERFLOW_VISIBLE ||
+ display->mOverflowX == NS_STYLE_OVERFLOW_CLIP ||
+ display->mOverflowY == NS_STYLE_OVERFLOW_VISIBLE ||
+ display->mOverflowY == NS_STYLE_OVERFLOW_CLIP)) {
+ // We can't store in the rule tree since a more specific rule might
+ // change these conditions.
+ conditions.SetUncacheable();
+
+ // NS_STYLE_OVERFLOW_CLIP is a deprecated value, so if it's specified
+ // in only one dimension, convert it to NS_STYLE_OVERFLOW_HIDDEN.
+ if (display->mOverflowX == NS_STYLE_OVERFLOW_CLIP)
+ display->mOverflowX = NS_STYLE_OVERFLOW_HIDDEN;
+ if (display->mOverflowY == NS_STYLE_OVERFLOW_CLIP)
+ display->mOverflowY = NS_STYLE_OVERFLOW_HIDDEN;
+
+ // If 'visible' is specified but doesn't match the other dimension, it
+ // turns into 'auto'.
+ if (display->mOverflowX == NS_STYLE_OVERFLOW_VISIBLE)
+ display->mOverflowX = NS_STYLE_OVERFLOW_AUTO;
+ if (display->mOverflowY == NS_STYLE_OVERFLOW_VISIBLE)
+ display->mOverflowY = NS_STYLE_OVERFLOW_AUTO;
+ }
+
+ // When 'contain: paint', update overflow from 'visible' to 'clip'.
+ if (display->IsContainPaint()) {
+ // XXX This actually sets overflow-[x|y] to -moz-hidden-unscrollable.
+ if (display->mOverflowX == NS_STYLE_OVERFLOW_VISIBLE) {
+ // This uncacheability (and the one below) could be fixed by adding
+ // mOriginalOverflowX and mOriginalOverflowY fields, if necessary.
+ display->mOverflowX = NS_STYLE_OVERFLOW_CLIP;
+ conditions.SetUncacheable();
+ }
+ if (display->mOverflowY == NS_STYLE_OVERFLOW_VISIBLE) {
+ display->mOverflowY = NS_STYLE_OVERFLOW_CLIP;
+ conditions.SetUncacheable();
+ }
+ }
+
+ SetValue(*aRuleData->ValueForOverflowClipBox(), display->mOverflowClipBox,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mOverflowClipBox,
+ NS_STYLE_OVERFLOW_CLIP_BOX_PADDING_BOX);
+
+ SetValue(*aRuleData->ValueForResize(), display->mResize, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mResize,
+ NS_STYLE_RESIZE_NONE);
+
+ if (display->mDisplay != StyleDisplay::None) {
+ // CSS2 9.7 specifies display type corrections dealing with 'float'
+ // and 'position'. Since generated content can't be floated or
+ // positioned, we can deal with it here.
+
+ nsIAtom* pseudo = aContext->GetPseudo();
+ if (pseudo && display->mDisplay == StyleDisplay::Contents) {
+ // We don't want to create frames for anonymous content using a parent
+ // frame that is for content above the root of the anon tree.
+ // (XXX what we really should check here is not GetPseudo() but if there's
+ // a 'content' property value that implies anon content but we can't
+ // check that here since that's a different struct(?))
+ // We might get display:contents to work for CSS_PSEUDO_ELEMENT_CONTAINS_ELEMENTS
+ // pseudos (:first-letter etc) in the future, but those have a lot of
+ // special handling in frame construction so they are also unsupported
+ // for now.
+ display->mOriginalDisplay = display->mDisplay = StyleDisplay::Inline;
+ conditions.SetUncacheable();
+ }
+
+ // Inherit a <fieldset> grid/flex display type into its anon content frame.
+ if (pseudo == nsCSSAnonBoxes::fieldsetContent) {
+ MOZ_ASSERT(display->mDisplay == StyleDisplay::Block,
+ "forms.css should have set 'display:block'");
+ switch (parentDisplay->mDisplay) {
+ case StyleDisplay::Grid:
+ case StyleDisplay::InlineGrid:
+ display->mDisplay = StyleDisplay::Grid;
+ conditions.SetUncacheable();
+ break;
+ case StyleDisplay::Flex:
+ case StyleDisplay::InlineFlex:
+ display->mDisplay = StyleDisplay::Flex;
+ conditions.SetUncacheable();
+ break;
+ default:
+ break; // Do nothing
+ }
+ }
+
+ if (nsCSSPseudoElements::firstLetter == pseudo) {
+ // a non-floating first-letter must be inline
+ // XXX this fix can go away once bug 103189 is fixed correctly
+ // Note that we reset mOriginalDisplay to enforce the invariant that it equals mDisplay if we're not positioned or floating.
+ display->mOriginalDisplay = display->mDisplay = StyleDisplay::Inline;
+
+ // We can't cache the data in the rule tree since if a more specific
+ // rule has 'float: left' we'll end up with the wrong 'display'
+ // property.
+ conditions.SetUncacheable();
+ }
+
+ if (display->IsAbsolutelyPositionedStyle()) {
+ // 1) if position is 'absolute' or 'fixed' then display must be
+ // block-level and float must be 'none'
+ EnsureBlockDisplay(display->mDisplay);
+ display->mFloat = StyleFloat::None;
+
+ // Note that it's OK to cache this struct in the ruletree
+ // because it's fine as-is for any style context that points to
+ // it directly, and any use of it as aStartStruct (e.g. if a
+ // more specific rule sets "position: static") will use
+ // mOriginalDisplay and mOriginalFloat, which we have carefully
+ // not changed.
+ } else if (display->mFloat != StyleFloat::None) {
+ // 2) if float is not none, and display is not none, then we must
+ // set a block-level 'display' type per CSS2.1 section 9.7.
+ EnsureBlockDisplay(display->mDisplay);
+
+ // Note that it's OK to cache this struct in the ruletree
+ // because it's fine as-is for any style context that points to
+ // it directly, and any use of it as aStartStruct (e.g. if a
+ // more specific rule sets "float: none") will use
+ // mOriginalDisplay, which we have carefully not changed.
+ }
+
+ if (display->IsContainPaint()) {
+ // An element with contain:paint or contain:layout needs to "be a
+ // formatting context". For the purposes of the "display" property, that
+ // just means we need to promote "display:inline" to "inline-block".
+ // XXX We may also need to promote ruby display vals; see bug 1179349.
+
+ // It's okay to cache this change in the rule tree for the same
+ // reasons as floats in the previous condition.
+ if (display->mDisplay == StyleDisplay::Inline) {
+ display->mDisplay = StyleDisplay::InlineBlock;
+ }
+ }
+ }
+
+ /* Convert the nsCSSValueList into an nsTArray<nsTransformFunction *>. */
+ const nsCSSValue* transformValue = aRuleData->ValueForTransform();
+ switch (transformValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ case eCSSUnit_None:
+ display->mSpecifiedTransform = nullptr;
+ break;
+
+ case eCSSUnit_Inherit:
+ display->mSpecifiedTransform = parentDisplay->mSpecifiedTransform;
+ conditions.SetUncacheable();
+ break;
+
+ case eCSSUnit_SharedList: {
+ nsCSSValueSharedList* list = transformValue->GetSharedListValue();
+ nsCSSValueList* head = list->mHead;
+ MOZ_ASSERT(head, "transform list must have at least one item");
+ // can get a _None in here from transform animation
+ if (head->mValue.GetUnit() == eCSSUnit_None) {
+ MOZ_ASSERT(head->mNext == nullptr, "none must be alone");
+ display->mSpecifiedTransform = nullptr;
+ } else {
+ display->mSpecifiedTransform = list;
+ }
+ break;
+ }
+
+ default:
+ MOZ_ASSERT(false, "unrecognized transform unit");
+ }
+
+ /* Convert the nsCSSValueList into a will-change bitfield for fast lookup */
+ const nsCSSValue* willChangeValue = aRuleData->ValueForWillChange();
+ switch (willChangeValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_List:
+ case eCSSUnit_ListDep: {
+ display->mWillChange.Clear();
+ display->mWillChangeBitField = 0;
+ for (const nsCSSValueList* item = willChangeValue->GetListValue();
+ item; item = item->mNext)
+ {
+ if (item->mValue.UnitHasStringValue()) {
+ nsAutoString buffer;
+ item->mValue.GetStringValue(buffer);
+ display->mWillChange.AppendElement(buffer);
+
+ if (buffer.EqualsLiteral("transform")) {
+ display->mWillChangeBitField |= NS_STYLE_WILL_CHANGE_TRANSFORM;
+ }
+ if (buffer.EqualsLiteral("opacity")) {
+ display->mWillChangeBitField |= NS_STYLE_WILL_CHANGE_OPACITY;
+ }
+ if (buffer.EqualsLiteral("scroll-position")) {
+ display->mWillChangeBitField |= NS_STYLE_WILL_CHANGE_SCROLL;
+ }
+
+ nsCSSPropertyID prop =
+ nsCSSProps::LookupProperty(buffer, CSSEnabledState::eForAllContent);
+ if (prop != eCSSProperty_UNKNOWN &&
+ prop != eCSSPropertyExtra_variable) {
+ // If the property given is a shorthand, it indicates the expectation
+ // for all the longhands the shorthand expands to.
+ if (nsCSSProps::IsShorthand(prop)) {
+ for (const nsCSSPropertyID* shorthands =
+ nsCSSProps::SubpropertyEntryFor(prop);
+ *shorthands != eCSSProperty_UNKNOWN; ++shorthands) {
+ display->mWillChangeBitField |= GetWillChangeBitFieldFromPropFlags(*shorthands);
+ }
+ } else {
+ display->mWillChangeBitField |= GetWillChangeBitFieldFromPropFlags(prop);
+ }
+ }
+ }
+ }
+ break;
+ }
+
+ case eCSSUnit_Inherit:
+ display->mWillChange = parentDisplay->mWillChange;
+ display->mWillChangeBitField = parentDisplay->mWillChangeBitField;
+ conditions.SetUncacheable();
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ case eCSSUnit_Auto:
+ display->mWillChange.Clear();
+ display->mWillChangeBitField = 0;
+ break;
+
+ default:
+ MOZ_ASSERT(false, "unrecognized will-change unit");
+ }
+
+ // vertical-align: enum, length, percent, calc, inherit
+ const nsCSSValue* verticalAlignValue = aRuleData->ValueForVerticalAlign();
+ if (!SetCoord(*verticalAlignValue, display->mVerticalAlign,
+ parentDisplay->mVerticalAlign,
+ SETCOORD_LPH | SETCOORD_ENUMERATED | SETCOORD_STORE_CALC,
+ aContext, mPresContext, conditions)) {
+ if (eCSSUnit_Initial == verticalAlignValue->GetUnit() ||
+ eCSSUnit_Unset == verticalAlignValue->GetUnit()) {
+ display->mVerticalAlign.SetIntValue(NS_STYLE_VERTICAL_ALIGN_BASELINE,
+ eStyleUnit_Enumerated);
+ }
+ }
+
+ /* Convert -moz-transform-origin. */
+ const nsCSSValue* transformOriginValue =
+ aRuleData->ValueForTransformOrigin();
+ if (transformOriginValue->GetUnit() != eCSSUnit_Null) {
+ const nsCSSValue& valX =
+ transformOriginValue->GetUnit() == eCSSUnit_Triplet ?
+ transformOriginValue->GetTripletValue().mXValue : *transformOriginValue;
+ const nsCSSValue& valY =
+ transformOriginValue->GetUnit() == eCSSUnit_Triplet ?
+ transformOriginValue->GetTripletValue().mYValue : *transformOriginValue;
+ const nsCSSValue& valZ =
+ transformOriginValue->GetUnit() == eCSSUnit_Triplet ?
+ transformOriginValue->GetTripletValue().mZValue : *transformOriginValue;
+
+ mozilla::DebugOnly<bool> cX =
+ SetCoord(valX, display->mTransformOrigin[0],
+ parentDisplay->mTransformOrigin[0],
+ SETCOORD_LPH | SETCOORD_INITIAL_HALF |
+ SETCOORD_BOX_POSITION | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+
+ mozilla::DebugOnly<bool> cY =
+ SetCoord(valY, display->mTransformOrigin[1],
+ parentDisplay->mTransformOrigin[1],
+ SETCOORD_LPH | SETCOORD_INITIAL_HALF |
+ SETCOORD_BOX_POSITION | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+
+ if (valZ.GetUnit() == eCSSUnit_Null) {
+ // Null for the z component means a 0 translation, not
+ // unspecified, as we have already checked the triplet
+ // value for Null.
+ display->mTransformOrigin[2].SetCoordValue(0);
+ } else {
+ mozilla::DebugOnly<bool> cZ =
+ SetCoord(valZ, display->mTransformOrigin[2],
+ parentDisplay->mTransformOrigin[2],
+ SETCOORD_LH | SETCOORD_INITIAL_ZERO | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+ MOZ_ASSERT(cY == cZ, "changed one but not the other");
+ }
+ MOZ_ASSERT(cX == cY, "changed one but not the other");
+ NS_ASSERTION(cX, "Malformed -moz-transform-origin parse!");
+ }
+
+ const nsCSSValue* perspectiveOriginValue =
+ aRuleData->ValueForPerspectiveOrigin();
+ if (perspectiveOriginValue->GetUnit() != eCSSUnit_Null) {
+ mozilla::DebugOnly<bool> result =
+ SetPairCoords(*perspectiveOriginValue,
+ display->mPerspectiveOrigin[0],
+ display->mPerspectiveOrigin[1],
+ parentDisplay->mPerspectiveOrigin[0],
+ parentDisplay->mPerspectiveOrigin[1],
+ SETCOORD_LPH | SETCOORD_INITIAL_HALF |
+ SETCOORD_BOX_POSITION | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+ NS_ASSERTION(result, "Malformed -moz-perspective-origin parse!");
+ }
+
+ SetCoord(*aRuleData->ValueForPerspective(),
+ display->mChildPerspective, parentDisplay->mChildPerspective,
+ SETCOORD_LAH | SETCOORD_INITIAL_NONE | SETCOORD_NONE |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+
+ SetValue(*aRuleData->ValueForBackfaceVisibility(),
+ display->mBackfaceVisibility, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mBackfaceVisibility,
+ NS_STYLE_BACKFACE_VISIBILITY_VISIBLE);
+
+ // transform-style: enum, inherit, initial
+ SetValue(*aRuleData->ValueForTransformStyle(),
+ display->mTransformStyle, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mTransformStyle,
+ NS_STYLE_TRANSFORM_STYLE_FLAT);
+
+ // transform-box: enum, inherit, initial
+ SetValue(*aRuleData->ValueForTransformBox(),
+ display->mTransformBox, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mTransformBox,
+ NS_STYLE_TRANSFORM_BOX_BORDER_BOX);
+
+ // orient: enum, inherit, initial
+ SetValue(*aRuleData->ValueForOrient(),
+ display->mOrient, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentDisplay->mOrient,
+ StyleOrient::Inline);
+
+ // shape-outside: none | [ <basic-shape> || <shape-box> ] | <image>
+ const nsCSSValue* shapeOutsideValue = aRuleData->ValueForShapeOutside();
+ switch (shapeOutsideValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_None:
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ display->mShapeOutside = StyleShapeOutside();
+ break;
+ case eCSSUnit_Inherit:
+ conditions.SetUncacheable();
+ display->mShapeOutside = parentDisplay->mShapeOutside;
+ break;
+ case eCSSUnit_URL: {
+ display->mShapeOutside = StyleShapeOutside();
+ display->mShapeOutside.SetURL(shapeOutsideValue->GetURLStructValue());
+ break;
+ }
+ case eCSSUnit_Array: {
+ display->mShapeOutside = StyleShapeOutside();
+ SetStyleShapeSourceToCSSValue(&display->mShapeOutside, shapeOutsideValue,
+ aContext, mPresContext, conditions);
+ break;
+ }
+ default:
+ MOZ_ASSERT_UNREACHABLE("Unrecognized shape-outside unit!");
+ }
+
+ COMPUTE_END_RESET(Display, display)
+}
+
+const void*
+nsRuleNode::ComputeVisibilityData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_INHERITED(Visibility, visibility, parentVisibility)
+
+ // IMPORTANT: No properties in this struct have lengths in them. We
+ // depend on this since CalcLengthWith can call StyleVisibility()
+ // to get the language for resolving fonts!
+
+ // direction: enum, inherit, initial
+ SetValue(*aRuleData->ValueForDirection(), visibility->mDirection,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentVisibility->mDirection,
+ (GET_BIDI_OPTION_DIRECTION(mPresContext->GetBidi())
+ == IBMBIDI_TEXTDIRECTION_RTL)
+ ? NS_STYLE_DIRECTION_RTL : NS_STYLE_DIRECTION_LTR);
+
+ // visibility: enum, inherit, initial
+ SetValue(*aRuleData->ValueForVisibility(), visibility->mVisible,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentVisibility->mVisible,
+ NS_STYLE_VISIBILITY_VISIBLE);
+
+ // image-rendering: enum, inherit
+ SetValue(*aRuleData->ValueForImageRendering(),
+ visibility->mImageRendering, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentVisibility->mImageRendering,
+ NS_STYLE_IMAGE_RENDERING_AUTO);
+
+ // writing-mode: enum, inherit, initial
+ SetValue(*aRuleData->ValueForWritingMode(), visibility->mWritingMode,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentVisibility->mWritingMode,
+ NS_STYLE_WRITING_MODE_HORIZONTAL_TB);
+
+ // text-orientation: enum, inherit, initial
+ SetValue(*aRuleData->ValueForTextOrientation(), visibility->mTextOrientation,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentVisibility->mTextOrientation,
+ NS_STYLE_TEXT_ORIENTATION_MIXED);
+
+ // image-orientation: enum, inherit, initial
+ const nsCSSValue* orientation = aRuleData->ValueForImageOrientation();
+ if (orientation->GetUnit() == eCSSUnit_Inherit ||
+ orientation->GetUnit() == eCSSUnit_Unset) {
+ conditions.SetUncacheable();
+ visibility->mImageOrientation = parentVisibility->mImageOrientation;
+ } else if (orientation->GetUnit() == eCSSUnit_Initial) {
+ visibility->mImageOrientation = nsStyleImageOrientation();
+ } else if (orientation->IsAngularUnit()) {
+ double angle = orientation->GetAngleValueInRadians();
+ visibility->mImageOrientation =
+ nsStyleImageOrientation::CreateAsAngleAndFlip(angle, false);
+ } else if (orientation->GetUnit() == eCSSUnit_Array) {
+ const nsCSSValue::Array* array = orientation->GetArrayValue();
+ MOZ_ASSERT(array->Item(0).IsAngularUnit(),
+ "First image-orientation value is not an angle");
+ MOZ_ASSERT(array->Item(1).GetUnit() == eCSSUnit_Enumerated &&
+ array->Item(1).GetIntValue() == NS_STYLE_IMAGE_ORIENTATION_FLIP,
+ "Second image-orientation value is not 'flip'");
+ double angle = array->Item(0).GetAngleValueInRadians();
+ visibility->mImageOrientation =
+ nsStyleImageOrientation::CreateAsAngleAndFlip(angle, true);
+
+ } else if (orientation->GetUnit() == eCSSUnit_Enumerated) {
+ switch (orientation->GetIntValue()) {
+ case NS_STYLE_IMAGE_ORIENTATION_FLIP:
+ visibility->mImageOrientation = nsStyleImageOrientation::CreateAsFlip();
+ break;
+ case NS_STYLE_IMAGE_ORIENTATION_FROM_IMAGE:
+ visibility->mImageOrientation = nsStyleImageOrientation::CreateAsFromImage();
+ break;
+ default:
+ NS_NOTREACHED("Invalid image-orientation enumerated value");
+ }
+ } else {
+ MOZ_ASSERT(orientation->GetUnit() == eCSSUnit_Null, "Should be null unit");
+ }
+
+ SetValue(*aRuleData->ValueForColorAdjust(), visibility->mColorAdjust,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentVisibility->mColorAdjust,
+ NS_STYLE_COLOR_ADJUST_ECONOMY);
+
+ COMPUTE_END_INHERITED(Visibility, visibility)
+}
+
+const void*
+nsRuleNode::ComputeColorData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_INHERITED(Color, color, parentColor)
+
+ // color: color, string, inherit
+ // Special case for currentColor. According to CSS3, setting color to 'currentColor'
+ // should behave as if it is inherited
+ const nsCSSValue* colorValue = aRuleData->ValueForColor();
+ if ((colorValue->GetUnit() == eCSSUnit_EnumColor &&
+ colorValue->GetIntValue() == NS_COLOR_CURRENTCOLOR) ||
+ colorValue->GetUnit() == eCSSUnit_Unset) {
+ color->mColor = parentColor->mColor;
+ conditions.SetUncacheable();
+ }
+ else if (colorValue->GetUnit() == eCSSUnit_Initial) {
+ color->mColor = mPresContext->DefaultColor();
+ }
+ else {
+ SetColor(*colorValue, parentColor->mColor, mPresContext, aContext,
+ color->mColor, conditions);
+ }
+
+ COMPUTE_END_INHERITED(Color, color)
+}
+
+// information about how to compute values for background-* properties
+template <class SpecifiedValueItem, class ComputedValueItem>
+struct BackgroundItemComputer {
+};
+
+template <>
+struct BackgroundItemComputer<nsCSSValueList, uint8_t>
+{
+ static void ComputeValue(nsStyleContext* aStyleContext,
+ const nsCSSValueList* aSpecifiedValue,
+ uint8_t& aComputedValue,
+ RuleNodeCacheConditions& aConditions)
+ {
+ SetValue(aSpecifiedValue->mValue, aComputedValue, aConditions,
+ SETVAL_ENUMERATED, uint8_t(0), 0);
+ }
+};
+
+template <>
+struct BackgroundItemComputer<nsCSSValuePairList, nsStyleImageLayers::Repeat>
+{
+ static void ComputeValue(nsStyleContext* aStyleContext,
+ const nsCSSValuePairList* aSpecifiedValue,
+ nsStyleImageLayers::Repeat& aComputedValue,
+ RuleNodeCacheConditions& aConditions)
+ {
+ NS_ASSERTION(aSpecifiedValue->mXValue.GetUnit() == eCSSUnit_Enumerated &&
+ (aSpecifiedValue->mYValue.GetUnit() == eCSSUnit_Enumerated ||
+ aSpecifiedValue->mYValue.GetUnit() == eCSSUnit_Null),
+ "Invalid unit");
+
+ bool hasContraction = true;
+ uint8_t value = aSpecifiedValue->mXValue.GetIntValue();
+ switch (value) {
+ case NS_STYLE_IMAGELAYER_REPEAT_REPEAT_X:
+ aComputedValue.mXRepeat = NS_STYLE_IMAGELAYER_REPEAT_REPEAT;
+ aComputedValue.mYRepeat = NS_STYLE_IMAGELAYER_REPEAT_NO_REPEAT;
+ break;
+ case NS_STYLE_IMAGELAYER_REPEAT_REPEAT_Y:
+ aComputedValue.mXRepeat = NS_STYLE_IMAGELAYER_REPEAT_NO_REPEAT;
+ aComputedValue.mYRepeat = NS_STYLE_IMAGELAYER_REPEAT_REPEAT;
+ break;
+ default:
+ NS_ASSERTION(value == NS_STYLE_IMAGELAYER_REPEAT_NO_REPEAT ||
+ value == NS_STYLE_IMAGELAYER_REPEAT_REPEAT ||
+ value == NS_STYLE_IMAGELAYER_REPEAT_SPACE ||
+ value == NS_STYLE_IMAGELAYER_REPEAT_ROUND, "Unexpected value");
+ aComputedValue.mXRepeat = value;
+ hasContraction = false;
+ break;
+ }
+
+ if (hasContraction) {
+ NS_ASSERTION(aSpecifiedValue->mYValue.GetUnit() == eCSSUnit_Null,
+ "Invalid unit.");
+ return;
+ }
+
+ switch (aSpecifiedValue->mYValue.GetUnit()) {
+ case eCSSUnit_Null:
+ aComputedValue.mYRepeat = aComputedValue.mXRepeat;
+ break;
+ case eCSSUnit_Enumerated:
+ value = aSpecifiedValue->mYValue.GetIntValue();
+ NS_ASSERTION(value == NS_STYLE_IMAGELAYER_REPEAT_NO_REPEAT ||
+ value == NS_STYLE_IMAGELAYER_REPEAT_REPEAT ||
+ value == NS_STYLE_IMAGELAYER_REPEAT_SPACE ||
+ value == NS_STYLE_IMAGELAYER_REPEAT_ROUND, "Unexpected value");
+ aComputedValue.mYRepeat = value;
+ break;
+ default:
+ NS_NOTREACHED("Unexpected CSS value");
+ break;
+ }
+ }
+};
+
+template <>
+struct BackgroundItemComputer<nsCSSValueList, nsStyleImage>
+{
+ static void ComputeValue(nsStyleContext* aStyleContext,
+ const nsCSSValueList* aSpecifiedValue,
+ nsStyleImage& aComputedValue,
+ RuleNodeCacheConditions& aConditions)
+ {
+ SetStyleImage(aStyleContext, aSpecifiedValue->mValue, aComputedValue,
+ aConditions);
+ }
+};
+
+template <>
+struct BackgroundItemComputer<nsCSSValueList, RefPtr<css::URLValueData>>
+{
+ static void ComputeValue(nsStyleContext* aStyleContext,
+ const nsCSSValueList* aSpecifiedValue,
+ RefPtr<css::URLValueData>& aComputedValue,
+ RuleNodeCacheConditions& aConditions)
+ {
+ switch (aSpecifiedValue->mValue.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_URL:
+ aComputedValue = aSpecifiedValue->mValue.GetURLStructValue();
+ break;
+ case eCSSUnit_Image:
+ aComputedValue = aSpecifiedValue->mValue.GetImageStructValue();
+ break;
+ default:
+ aComputedValue = nullptr;
+ break;
+ }
+ }
+};
+
+/* Helper function for ComputePositionValue.
+ * This function computes a single PositionCoord from two nsCSSValue objects,
+ * which represent an edge and an offset from that edge.
+ */
+static void
+ComputePositionCoord(nsStyleContext* aStyleContext,
+ const nsCSSValue& aEdge,
+ const nsCSSValue& aOffset,
+ Position::Coord* aResult,
+ RuleNodeCacheConditions& aConditions)
+{
+ if (eCSSUnit_Percent == aOffset.GetUnit()) {
+ aResult->mLength = 0;
+ aResult->mPercent = aOffset.GetPercentValue();
+ aResult->mHasPercent = true;
+ } else if (aOffset.IsLengthUnit()) {
+ aResult->mLength = CalcLength(aOffset, aStyleContext,
+ aStyleContext->PresContext(),
+ aConditions);
+ aResult->mPercent = 0.0f;
+ aResult->mHasPercent = false;
+ } else if (aOffset.IsCalcUnit()) {
+ LengthPercentPairCalcOps ops(aStyleContext,
+ aStyleContext->PresContext(),
+ aConditions);
+ nsRuleNode::ComputedCalc vals = ComputeCalc(aOffset, ops);
+ aResult->mLength = vals.mLength;
+ aResult->mPercent = vals.mPercent;
+ aResult->mHasPercent = ops.mHasPercent;
+ } else {
+ aResult->mLength = 0;
+ aResult->mPercent = 0.0f;
+ aResult->mHasPercent = false;
+ NS_ASSERTION(aOffset.GetUnit() == eCSSUnit_Null, "unexpected unit");
+ }
+
+ if (eCSSUnit_Enumerated == aEdge.GetUnit()) {
+ int sign;
+ if (aEdge.GetIntValue() & (NS_STYLE_IMAGELAYER_POSITION_BOTTOM |
+ NS_STYLE_IMAGELAYER_POSITION_RIGHT)) {
+ sign = -1;
+ } else {
+ sign = 1;
+ }
+ aResult->mPercent = GetFloatFromBoxPosition(aEdge.GetIntValue()) +
+ sign * aResult->mPercent;
+ aResult->mLength = sign * aResult->mLength;
+ aResult->mHasPercent = true;
+ } else {
+ NS_ASSERTION(eCSSUnit_Null == aEdge.GetUnit(), "unexpected unit");
+ }
+}
+
+/* Helper function to convert a CSS <position> specified value into its
+ * computed-style form. */
+static void
+ComputePositionValue(nsStyleContext* aStyleContext,
+ const nsCSSValue& aValue,
+ Position& aComputedValue,
+ RuleNodeCacheConditions& aConditions)
+{
+ NS_ASSERTION(aValue.GetUnit() == eCSSUnit_Array,
+ "unexpected unit for CSS <position> value");
+
+ RefPtr<nsCSSValue::Array> positionArray = aValue.GetArrayValue();
+ NS_ASSERTION(positionArray->Count() == 4,
+ "unexpected number of values in CSS <position> value");
+
+ const nsCSSValue &xEdge = positionArray->Item(0);
+ const nsCSSValue &xOffset = positionArray->Item(1);
+ const nsCSSValue &yEdge = positionArray->Item(2);
+ const nsCSSValue &yOffset = positionArray->Item(3);
+
+ NS_ASSERTION((eCSSUnit_Enumerated == xEdge.GetUnit() ||
+ eCSSUnit_Null == xEdge.GetUnit()) &&
+ (eCSSUnit_Enumerated == yEdge.GetUnit() ||
+ eCSSUnit_Null == yEdge.GetUnit()) &&
+ eCSSUnit_Enumerated != xOffset.GetUnit() &&
+ eCSSUnit_Enumerated != yOffset.GetUnit(),
+ "Invalid background position");
+
+ ComputePositionCoord(aStyleContext, xEdge, xOffset,
+ &aComputedValue.mXPosition,
+ aConditions);
+
+ ComputePositionCoord(aStyleContext, yEdge, yOffset,
+ &aComputedValue.mYPosition,
+ aConditions);
+}
+
+/* Helper function to convert the -x or -y part of a CSS <position> specified
+ * value into its computed-style form. */
+static void
+ComputePositionCoordValue(nsStyleContext* aStyleContext,
+ const nsCSSValue& aValue,
+ Position::Coord& aComputedValue,
+ RuleNodeCacheConditions& aConditions)
+{
+ NS_ASSERTION(aValue.GetUnit() == eCSSUnit_Array,
+ "unexpected unit for position coord value");
+
+ RefPtr<nsCSSValue::Array> positionArray = aValue.GetArrayValue();
+ NS_ASSERTION(positionArray->Count() == 2,
+ "unexpected number of values, expecting one edge and one offset");
+
+ const nsCSSValue &edge = positionArray->Item(0);
+ const nsCSSValue &offset = positionArray->Item(1);
+
+ NS_ASSERTION((eCSSUnit_Enumerated == edge.GetUnit() ||
+ eCSSUnit_Null == edge.GetUnit()) &&
+ eCSSUnit_Enumerated != offset.GetUnit(),
+ "Invalid background position");
+
+ ComputePositionCoord(aStyleContext, edge, offset,
+ &aComputedValue,
+ aConditions);
+}
+
+struct BackgroundSizeAxis {
+ nsCSSValue nsCSSValuePairList::* specified;
+ nsStyleImageLayers::Size::Dimension nsStyleImageLayers::Size::* result;
+ uint8_t nsStyleImageLayers::Size::* type;
+};
+
+static const BackgroundSizeAxis gBGSizeAxes[] = {
+ { &nsCSSValuePairList::mXValue,
+ &nsStyleImageLayers::Size::mWidth,
+ &nsStyleImageLayers::Size::mWidthType },
+ { &nsCSSValuePairList::mYValue,
+ &nsStyleImageLayers::Size::mHeight,
+ &nsStyleImageLayers::Size::mHeightType }
+};
+
+template <>
+struct BackgroundItemComputer<nsCSSValuePairList, nsStyleImageLayers::Size>
+{
+ static void ComputeValue(nsStyleContext* aStyleContext,
+ const nsCSSValuePairList* aSpecifiedValue,
+ nsStyleImageLayers::Size& aComputedValue,
+ RuleNodeCacheConditions& aConditions)
+ {
+ nsStyleImageLayers::Size &size = aComputedValue;
+ for (const BackgroundSizeAxis *axis = gBGSizeAxes,
+ *axis_end = ArrayEnd(gBGSizeAxes);
+ axis < axis_end; ++axis) {
+ const nsCSSValue &specified = aSpecifiedValue->*(axis->specified);
+ if (eCSSUnit_Auto == specified.GetUnit()) {
+ size.*(axis->type) = nsStyleImageLayers::Size::eAuto;
+ }
+ else if (eCSSUnit_Enumerated == specified.GetUnit()) {
+ static_assert(nsStyleImageLayers::Size::eContain ==
+ NS_STYLE_IMAGELAYER_SIZE_CONTAIN &&
+ nsStyleImageLayers::Size::eCover ==
+ NS_STYLE_IMAGELAYER_SIZE_COVER,
+ "background size constants out of sync");
+ MOZ_ASSERT(specified.GetIntValue() == NS_STYLE_IMAGELAYER_SIZE_CONTAIN ||
+ specified.GetIntValue() == NS_STYLE_IMAGELAYER_SIZE_COVER,
+ "invalid enumerated value for size coordinate");
+ size.*(axis->type) = specified.GetIntValue();
+ }
+ else if (eCSSUnit_Null == specified.GetUnit()) {
+ MOZ_ASSERT(axis == gBGSizeAxes + 1,
+ "null allowed only as height value, and only "
+ "for contain/cover/initial/inherit");
+#ifdef DEBUG
+ {
+ const nsCSSValue &widthValue = aSpecifiedValue->mXValue;
+ MOZ_ASSERT(widthValue.GetUnit() != eCSSUnit_Inherit &&
+ widthValue.GetUnit() != eCSSUnit_Initial &&
+ widthValue.GetUnit() != eCSSUnit_Unset,
+ "initial/inherit/unset should already have been handled");
+ MOZ_ASSERT(widthValue.GetUnit() == eCSSUnit_Enumerated &&
+ (widthValue.GetIntValue() == NS_STYLE_IMAGELAYER_SIZE_CONTAIN ||
+ widthValue.GetIntValue() == NS_STYLE_IMAGELAYER_SIZE_COVER),
+ "null height value not corresponding to allowable "
+ "non-null width value");
+ }
+#endif
+ size.*(axis->type) = size.mWidthType;
+ }
+ else if (eCSSUnit_Percent == specified.GetUnit()) {
+ (size.*(axis->result)).mLength = 0;
+ (size.*(axis->result)).mPercent = specified.GetPercentValue();
+ (size.*(axis->result)).mHasPercent = true;
+ size.*(axis->type) = nsStyleImageLayers::Size::eLengthPercentage;
+ }
+ else if (specified.IsLengthUnit()) {
+ (size.*(axis->result)).mLength =
+ CalcLength(specified, aStyleContext, aStyleContext->PresContext(),
+ aConditions);
+ (size.*(axis->result)).mPercent = 0.0f;
+ (size.*(axis->result)).mHasPercent = false;
+ size.*(axis->type) = nsStyleImageLayers::Size::eLengthPercentage;
+ } else {
+ MOZ_ASSERT(specified.IsCalcUnit(), "unexpected unit");
+ LengthPercentPairCalcOps ops(aStyleContext,
+ aStyleContext->PresContext(),
+ aConditions);
+ nsRuleNode::ComputedCalc vals = ComputeCalc(specified, ops);
+ (size.*(axis->result)).mLength = vals.mLength;
+ (size.*(axis->result)).mPercent = vals.mPercent;
+ (size.*(axis->result)).mHasPercent = ops.mHasPercent;
+ size.*(axis->type) = nsStyleImageLayers::Size::eLengthPercentage;
+ }
+ }
+
+ MOZ_ASSERT(size.mWidthType < nsStyleImageLayers::Size::eDimensionType_COUNT,
+ "bad width type");
+ MOZ_ASSERT(size.mHeightType < nsStyleImageLayers::Size::eDimensionType_COUNT,
+ "bad height type");
+ MOZ_ASSERT((size.mWidthType != nsStyleImageLayers::Size::eContain &&
+ size.mWidthType != nsStyleImageLayers::Size::eCover) ||
+ size.mWidthType == size.mHeightType,
+ "contain/cover apply to both dimensions or to neither");
+ }
+};
+
+template <class ComputedValueItem>
+static void
+SetImageLayerList(nsStyleContext* aStyleContext,
+ const nsCSSValue& aValue,
+ nsStyleAutoArray<nsStyleImageLayers::Layer>& aLayers,
+ const nsStyleAutoArray<nsStyleImageLayers::Layer>& aParentLayers,
+ ComputedValueItem nsStyleImageLayers::Layer::* aResultLocation,
+ ComputedValueItem aInitialValue,
+ uint32_t aParentItemCount,
+ uint32_t& aItemCount,
+ uint32_t& aMaxItemCount,
+ bool& aRebuild,
+ RuleNodeCacheConditions& aConditions)
+{
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Inherit:
+ aRebuild = true;
+ aConditions.SetUncacheable();
+ aLayers.EnsureLengthAtLeast(aParentItemCount);
+ aItemCount = aParentItemCount;
+ for (uint32_t i = 0; i < aParentItemCount; ++i) {
+ aLayers[i].*aResultLocation = aParentLayers[i].*aResultLocation;
+ }
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ aRebuild = true;
+ aItemCount = 1;
+ aLayers[0].*aResultLocation = aInitialValue;
+ break;
+
+ case eCSSUnit_List:
+ case eCSSUnit_ListDep: {
+ aRebuild = true;
+ aItemCount = 0;
+ const nsCSSValueList* item = aValue.GetListValue();
+ do {
+ NS_ASSERTION(item->mValue.GetUnit() != eCSSUnit_Null &&
+ item->mValue.GetUnit() != eCSSUnit_Inherit &&
+ item->mValue.GetUnit() != eCSSUnit_Initial &&
+ item->mValue.GetUnit() != eCSSUnit_Unset,
+ "unexpected unit");
+ ++aItemCount;
+ aLayers.EnsureLengthAtLeast(aItemCount);
+ BackgroundItemComputer<nsCSSValueList, ComputedValueItem>
+ ::ComputeValue(aStyleContext, item,
+ aLayers[aItemCount-1].*aResultLocation,
+ aConditions);
+ item = item->mNext;
+ } while (item);
+ break;
+ }
+
+ default:
+ MOZ_ASSERT(false, "unexpected unit");
+ }
+
+ if (aItemCount > aMaxItemCount)
+ aMaxItemCount = aItemCount;
+}
+
+// The same as SetImageLayerList, but for values stored in
+// layer.mPosition.*aResultLocation instead of layer.*aResultLocation.
+// This code is duplicated because it would be annoying to make
+// SetImageLayerList generic enough to handle both cases.
+static void
+SetImageLayerPositionCoordList(
+ nsStyleContext* aStyleContext,
+ const nsCSSValue& aValue,
+ nsStyleAutoArray<nsStyleImageLayers::Layer>& aLayers,
+ const nsStyleAutoArray<nsStyleImageLayers::Layer>& aParentLayers,
+ Position::Coord
+ Position::* aResultLocation,
+ Position::Coord aInitialValue,
+ uint32_t aParentItemCount,
+ uint32_t& aItemCount,
+ uint32_t& aMaxItemCount,
+ bool& aRebuild,
+ RuleNodeCacheConditions& aConditions)
+{
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Inherit:
+ aRebuild = true;
+ aConditions.SetUncacheable();
+ aLayers.EnsureLengthAtLeast(aParentItemCount);
+ aItemCount = aParentItemCount;
+ for (uint32_t i = 0; i < aParentItemCount; ++i) {
+ aLayers[i].mPosition.*aResultLocation = aParentLayers[i].mPosition.*aResultLocation;
+ }
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ aRebuild = true;
+ aItemCount = 1;
+ aLayers[0].mPosition.*aResultLocation = aInitialValue;
+ break;
+
+ case eCSSUnit_List:
+ case eCSSUnit_ListDep: {
+ aRebuild = true;
+ aItemCount = 0;
+ const nsCSSValueList* item = aValue.GetListValue();
+ do {
+ NS_ASSERTION(item->mValue.GetUnit() != eCSSUnit_Null &&
+ item->mValue.GetUnit() != eCSSUnit_Inherit &&
+ item->mValue.GetUnit() != eCSSUnit_Initial &&
+ item->mValue.GetUnit() != eCSSUnit_Unset,
+ "unexpected unit");
+ ++aItemCount;
+ aLayers.EnsureLengthAtLeast(aItemCount);
+
+ ComputePositionCoordValue(aStyleContext, item->mValue,
+ aLayers[aItemCount-1].mPosition.*aResultLocation,
+ aConditions);
+ item = item->mNext;
+ } while (item);
+ break;
+ }
+
+ default:
+ MOZ_ASSERT(false, "unexpected unit");
+ }
+
+ if (aItemCount > aMaxItemCount)
+ aMaxItemCount = aItemCount;
+}
+
+template <class ComputedValueItem>
+static void
+SetImageLayerPairList(nsStyleContext* aStyleContext,
+ const nsCSSValue& aValue,
+ nsStyleAutoArray<nsStyleImageLayers::Layer>& aLayers,
+ const nsStyleAutoArray<nsStyleImageLayers::Layer>& aParentLayers,
+ ComputedValueItem nsStyleImageLayers::Layer::*
+ aResultLocation,
+ ComputedValueItem aInitialValue,
+ uint32_t aParentItemCount,
+ uint32_t& aItemCount,
+ uint32_t& aMaxItemCount,
+ bool& aRebuild,
+ RuleNodeCacheConditions& aConditions)
+{
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Inherit:
+ aRebuild = true;
+ aConditions.SetUncacheable();
+ aLayers.EnsureLengthAtLeast(aParentItemCount);
+ aItemCount = aParentItemCount;
+ for (uint32_t i = 0; i < aParentItemCount; ++i) {
+ aLayers[i].*aResultLocation = aParentLayers[i].*aResultLocation;
+ }
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ aRebuild = true;
+ aItemCount = 1;
+ aLayers[0].*aResultLocation = aInitialValue;
+ break;
+
+ case eCSSUnit_PairList:
+ case eCSSUnit_PairListDep: {
+ aRebuild = true;
+ aItemCount = 0;
+ const nsCSSValuePairList* item = aValue.GetPairListValue();
+ do {
+ NS_ASSERTION(item->mXValue.GetUnit() != eCSSUnit_Inherit &&
+ item->mXValue.GetUnit() != eCSSUnit_Initial &&
+ item->mXValue.GetUnit() != eCSSUnit_Unset &&
+ item->mYValue.GetUnit() != eCSSUnit_Inherit &&
+ item->mYValue.GetUnit() != eCSSUnit_Initial &&
+ item->mYValue.GetUnit() != eCSSUnit_Unset,
+ "unexpected unit");
+ ++aItemCount;
+ aLayers.EnsureLengthAtLeast(aItemCount);
+ BackgroundItemComputer<nsCSSValuePairList, ComputedValueItem>
+ ::ComputeValue(aStyleContext, item,
+ aLayers[aItemCount-1].*aResultLocation,
+ aConditions);
+ item = item->mNext;
+ } while (item);
+ break;
+ }
+
+ default:
+ MOZ_ASSERT(false, "unexpected unit");
+ }
+
+ if (aItemCount > aMaxItemCount)
+ aMaxItemCount = aItemCount;
+}
+
+template <class ComputedValueItem>
+static void
+FillImageLayerList(
+ nsStyleAutoArray<nsStyleImageLayers::Layer>& aLayers,
+ ComputedValueItem nsStyleImageLayers::Layer::* aResultLocation,
+ uint32_t aItemCount, uint32_t aFillCount)
+{
+ NS_PRECONDITION(aFillCount <= aLayers.Length(), "unexpected array length");
+ for (uint32_t sourceLayer = 0, destLayer = aItemCount;
+ destLayer < aFillCount;
+ ++sourceLayer, ++destLayer) {
+ aLayers[destLayer].*aResultLocation =
+ aLayers[sourceLayer].*aResultLocation;
+ }
+}
+
+// The same as FillImageLayerList, but for values stored in
+// layer.mPosition.*aResultLocation instead of layer.*aResultLocation.
+static void
+FillImageLayerPositionCoordList(
+ nsStyleAutoArray<nsStyleImageLayers::Layer>& aLayers,
+ Position::Coord
+ Position::* aResultLocation,
+ uint32_t aItemCount, uint32_t aFillCount)
+{
+ NS_PRECONDITION(aFillCount <= aLayers.Length(), "unexpected array length");
+ for (uint32_t sourceLayer = 0, destLayer = aItemCount;
+ destLayer < aFillCount;
+ ++sourceLayer, ++destLayer) {
+ aLayers[destLayer].mPosition.*aResultLocation =
+ aLayers[sourceLayer].mPosition.*aResultLocation;
+ }
+}
+
+/* static */
+void
+nsRuleNode::FillAllBackgroundLists(nsStyleImageLayers& aImage,
+ uint32_t aMaxItemCount)
+{
+ // Delete any extra items. We need to keep layers in which any
+ // property was specified.
+ aImage.mLayers.TruncateLengthNonZero(aMaxItemCount);
+
+ uint32_t fillCount = aImage.mImageCount;
+ FillImageLayerList(aImage.mLayers,
+ &nsStyleImageLayers::Layer::mImage,
+ aImage.mImageCount, fillCount);
+ FillImageLayerList(aImage.mLayers,
+ &nsStyleImageLayers::Layer::mRepeat,
+ aImage.mRepeatCount, fillCount);
+ FillImageLayerList(aImage.mLayers,
+ &nsStyleImageLayers::Layer::mAttachment,
+ aImage.mAttachmentCount, fillCount);
+ FillImageLayerList(aImage.mLayers,
+ &nsStyleImageLayers::Layer::mClip,
+ aImage.mClipCount, fillCount);
+ FillImageLayerList(aImage.mLayers,
+ &nsStyleImageLayers::Layer::mBlendMode,
+ aImage.mBlendModeCount, fillCount);
+ FillImageLayerList(aImage.mLayers,
+ &nsStyleImageLayers::Layer::mOrigin,
+ aImage.mOriginCount, fillCount);
+ FillImageLayerPositionCoordList(aImage.mLayers,
+ &Position::mXPosition,
+ aImage.mPositionXCount, fillCount);
+ FillImageLayerPositionCoordList(aImage.mLayers,
+ &Position::mYPosition,
+ aImage.mPositionYCount, fillCount);
+ FillImageLayerList(aImage.mLayers,
+ &nsStyleImageLayers::Layer::mSize,
+ aImage.mSizeCount, fillCount);
+}
+
+const void*
+nsRuleNode::ComputeBackgroundData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(Background, bg, parentBG)
+
+ // background-color: color, string, inherit
+ const nsCSSValue* backColorValue = aRuleData->ValueForBackgroundColor();
+ if (eCSSUnit_Initial == backColorValue->GetUnit() ||
+ eCSSUnit_Unset == backColorValue->GetUnit()) {
+ bg->mBackgroundColor = NS_RGBA(0, 0, 0, 0);
+ } else if (!SetColor(*backColorValue, parentBG->mBackgroundColor,
+ mPresContext, aContext, bg->mBackgroundColor,
+ conditions)) {
+ NS_ASSERTION(eCSSUnit_Null == backColorValue->GetUnit(),
+ "unexpected color unit");
+ }
+
+ uint32_t maxItemCount = 1;
+ bool rebuild = false;
+
+ // background-image: url (stored as image), none, inherit [list]
+ nsStyleImage initialImage;
+ SetImageLayerList(aContext, *aRuleData->ValueForBackgroundImage(),
+ bg->mImage.mLayers,
+ parentBG->mImage.mLayers,
+ &nsStyleImageLayers::Layer::mImage,
+ initialImage, parentBG->mImage.mImageCount,
+ bg->mImage.mImageCount,
+ maxItemCount, rebuild, conditions);
+
+ // background-repeat: enum, inherit, initial [pair list]
+ nsStyleImageLayers::Repeat initialRepeat;
+ initialRepeat.SetInitialValues();
+ SetImageLayerPairList(aContext, *aRuleData->ValueForBackgroundRepeat(),
+ bg->mImage.mLayers,
+ parentBG->mImage.mLayers,
+ &nsStyleImageLayers::Layer::mRepeat,
+ initialRepeat, parentBG->mImage.mRepeatCount,
+ bg->mImage.mRepeatCount, maxItemCount, rebuild,
+ conditions);
+
+ // background-attachment: enum, inherit, initial [list]
+ SetImageLayerList(aContext, *aRuleData->ValueForBackgroundAttachment(),
+ bg->mImage.mLayers, parentBG->mImage.mLayers,
+ &nsStyleImageLayers::Layer::mAttachment,
+ uint8_t(NS_STYLE_IMAGELAYER_ATTACHMENT_SCROLL),
+ parentBG->mImage.mAttachmentCount,
+ bg->mImage.mAttachmentCount, maxItemCount, rebuild,
+ conditions);
+
+ // background-clip: enum, inherit, initial [list]
+ SetImageLayerList(aContext, *aRuleData->ValueForBackgroundClip(),
+ bg->mImage.mLayers,
+ parentBG->mImage.mLayers,
+ &nsStyleImageLayers::Layer::mClip,
+ uint8_t(NS_STYLE_IMAGELAYER_CLIP_BORDER),
+ parentBG->mImage.mClipCount,
+ bg->mImage.mClipCount, maxItemCount, rebuild, conditions);
+
+ // background-blend-mode: enum, inherit, initial [list]
+ SetImageLayerList(aContext, *aRuleData->ValueForBackgroundBlendMode(),
+ bg->mImage.mLayers,
+ parentBG->mImage.mLayers,
+ &nsStyleImageLayers::Layer::mBlendMode,
+ uint8_t(NS_STYLE_BLEND_NORMAL),
+ parentBG->mImage.mBlendModeCount,
+ bg->mImage.mBlendModeCount, maxItemCount, rebuild,
+ conditions);
+
+ // background-origin: enum, inherit, initial [list]
+ SetImageLayerList(aContext, *aRuleData->ValueForBackgroundOrigin(),
+ bg->mImage.mLayers,
+ parentBG->mImage.mLayers,
+ &nsStyleImageLayers::Layer::mOrigin,
+ uint8_t(NS_STYLE_IMAGELAYER_ORIGIN_PADDING),
+ parentBG->mImage.mOriginCount,
+ bg->mImage.mOriginCount, maxItemCount, rebuild,
+ conditions);
+
+ // background-position-x/y: enum, length, percent (flags), inherit [list]
+ Position::Coord initialPositionCoord;
+ initialPositionCoord.mPercent = 0.0f;
+ initialPositionCoord.mLength = 0;
+ initialPositionCoord.mHasPercent = true;
+
+ SetImageLayerPositionCoordList(
+ aContext, *aRuleData->ValueForBackgroundPositionX(),
+ bg->mImage.mLayers,
+ parentBG->mImage.mLayers,
+ &Position::mXPosition,
+ initialPositionCoord, parentBG->mImage.mPositionXCount,
+ bg->mImage.mPositionXCount, maxItemCount, rebuild,
+ conditions);
+ SetImageLayerPositionCoordList(
+ aContext, *aRuleData->ValueForBackgroundPositionY(),
+ bg->mImage.mLayers,
+ parentBG->mImage.mLayers,
+ &Position::mYPosition,
+ initialPositionCoord, parentBG->mImage.mPositionYCount,
+ bg->mImage.mPositionYCount, maxItemCount, rebuild,
+ conditions);
+
+ // background-size: enum, length, auto, inherit, initial [pair list]
+ nsStyleImageLayers::Size initialSize;
+ initialSize.SetInitialValues();
+ SetImageLayerPairList(aContext, *aRuleData->ValueForBackgroundSize(),
+ bg->mImage.mLayers,
+ parentBG->mImage.mLayers,
+ &nsStyleImageLayers::Layer::mSize,
+ initialSize, parentBG->mImage.mSizeCount,
+ bg->mImage.mSizeCount, maxItemCount, rebuild,
+ conditions);
+
+ if (rebuild) {
+ FillAllBackgroundLists(bg->mImage, maxItemCount);
+ }
+
+ COMPUTE_END_RESET(Background, bg)
+}
+
+const void*
+nsRuleNode::ComputeMarginData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(Margin, margin, parentMargin)
+
+ // margin: length, percent, calc, inherit
+ const nsCSSPropertyID* subprops =
+ nsCSSProps::SubpropertyEntryFor(eCSSProperty_margin);
+ nsStyleCoord coord;
+ NS_FOR_CSS_SIDES(side) {
+ nsStyleCoord parentCoord = parentMargin->mMargin.Get(side);
+ if (SetCoord(*aRuleData->ValueFor(subprops[side]),
+ coord, parentCoord,
+ SETCOORD_LPAH | SETCOORD_INITIAL_ZERO | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions)) {
+ margin->mMargin.Set(side, coord);
+ }
+ }
+
+ COMPUTE_END_RESET(Margin, margin)
+}
+
+static void
+SetBorderImageRect(const nsCSSValue& aValue,
+ /** outparam */ nsCSSRect& aRect)
+{
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Null:
+ aRect.Reset();
+ break;
+ case eCSSUnit_Rect:
+ aRect = aValue.GetRectValue();
+ break;
+ case eCSSUnit_Inherit:
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ aRect.SetAllSidesTo(aValue);
+ break;
+ default:
+ NS_ASSERTION(false, "Unexpected border image value for rect.");
+ }
+}
+
+static void
+SetBorderImagePair(const nsCSSValue& aValue,
+ /** outparam */ nsCSSValuePair& aPair)
+{
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Null:
+ aPair.Reset();
+ break;
+ case eCSSUnit_Pair:
+ aPair = aValue.GetPairValue();
+ break;
+ case eCSSUnit_Inherit:
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ aPair.SetBothValuesTo(aValue);
+ break;
+ default:
+ NS_ASSERTION(false, "Unexpected border image value for pair.");
+ }
+}
+
+static void
+SetBorderImageSlice(const nsCSSValue& aValue,
+ /** outparam */ nsCSSValue& aSlice,
+ /** outparam */ nsCSSValue& aFill)
+{
+ const nsCSSValueList* valueList;
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Null:
+ aSlice.Reset();
+ aFill.Reset();
+ break;
+ case eCSSUnit_List:
+ // Get slice dimensions.
+ valueList = aValue.GetListValue();
+ aSlice = valueList->mValue;
+
+ // Get "fill" keyword.
+ valueList = valueList->mNext;
+ if (valueList) {
+ aFill = valueList->mValue;
+ } else {
+ aFill.SetInitialValue();
+ }
+ break;
+ case eCSSUnit_Inherit:
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ aSlice = aValue;
+ aFill = aValue;
+ break;
+ default:
+ NS_ASSERTION(false, "Unexpected border image value for pair.");
+ }
+}
+
+const void*
+nsRuleNode::ComputeBorderData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(Border, border, parentBorder)
+
+ // box-decoration-break: enum, inherit, initial
+ SetValue(*aRuleData->ValueForBoxDecorationBreak(),
+ border->mBoxDecorationBreak, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentBorder->mBoxDecorationBreak,
+ StyleBoxDecorationBreak::Slice);
+
+ // border-width, border-*-width: length, enum, inherit
+ nsStyleCoord coord;
+ {
+ const nsCSSPropertyID* subprops =
+ nsCSSProps::SubpropertyEntryFor(eCSSProperty_border_width);
+ NS_FOR_CSS_SIDES(side) {
+ const nsCSSValue& value = *aRuleData->ValueFor(subprops[side]);
+ NS_ASSERTION(eCSSUnit_Percent != value.GetUnit(),
+ "Percentage borders not implemented yet "
+ "If implementing, make sure to fix all consumers of "
+ "nsStyleBorder, the IsPercentageAwareChild method, "
+ "the nsAbsoluteContainingBlock::FrameDependsOnContainer "
+ "method, the "
+ "nsLineLayout::IsPercentageAwareReplacedElement method "
+ "and probably some other places");
+ if (eCSSUnit_Enumerated == value.GetUnit()) {
+ NS_ASSERTION(value.GetIntValue() == NS_STYLE_BORDER_WIDTH_THIN ||
+ value.GetIntValue() == NS_STYLE_BORDER_WIDTH_MEDIUM ||
+ value.GetIntValue() == NS_STYLE_BORDER_WIDTH_THICK,
+ "Unexpected enum value");
+ border->SetBorderWidth(side,
+ (mPresContext->GetBorderWidthTable())[value.GetIntValue()]);
+ }
+ // OK to pass bad aParentCoord since we're not passing SETCOORD_INHERIT
+ else if (SetCoord(value, coord, nsStyleCoord(),
+ SETCOORD_LENGTH | SETCOORD_CALC_LENGTH_ONLY,
+ aContext, mPresContext, conditions)) {
+ NS_ASSERTION(coord.GetUnit() == eStyleUnit_Coord, "unexpected unit");
+ // clamp negative calc() to 0.
+ border->SetBorderWidth(side, std::max(coord.GetCoordValue(), 0));
+ }
+ else if (eCSSUnit_Inherit == value.GetUnit()) {
+ conditions.SetUncacheable();
+ border->SetBorderWidth(side,
+ parentBorder->GetComputedBorder().Side(side));
+ }
+ else if (eCSSUnit_Initial == value.GetUnit() ||
+ eCSSUnit_Unset == value.GetUnit()) {
+ border->SetBorderWidth(side,
+ (mPresContext->GetBorderWidthTable())[NS_STYLE_BORDER_WIDTH_MEDIUM]);
+ }
+ else {
+ NS_ASSERTION(eCSSUnit_Null == value.GetUnit(),
+ "missing case handling border width");
+ }
+ }
+ }
+
+ // border-style, border-*-style: enum, inherit
+ {
+ const nsCSSPropertyID* subprops =
+ nsCSSProps::SubpropertyEntryFor(eCSSProperty_border_style);
+ NS_FOR_CSS_SIDES(side) {
+ const nsCSSValue& value = *aRuleData->ValueFor(subprops[side]);
+ nsCSSUnit unit = value.GetUnit();
+ MOZ_ASSERT(eCSSUnit_None != unit,
+ "'none' should be handled as enumerated value");
+ if (eCSSUnit_Enumerated == unit) {
+ border->SetBorderStyle(side, value.GetIntValue());
+ }
+ else if (eCSSUnit_Initial == unit ||
+ eCSSUnit_Unset == unit) {
+ border->SetBorderStyle(side, NS_STYLE_BORDER_STYLE_NONE);
+ }
+ else if (eCSSUnit_Inherit == unit) {
+ conditions.SetUncacheable();
+ border->SetBorderStyle(side, parentBorder->GetBorderStyle(side));
+ }
+ }
+ }
+
+ // -moz-border-*-colors: color, string, enum, none, inherit/initial
+ nscolor borderColor;
+ nscolor unused = NS_RGB(0,0,0);
+
+ static const nsCSSPropertyID borderColorsProps[] = {
+ eCSSProperty_border_top_colors,
+ eCSSProperty_border_right_colors,
+ eCSSProperty_border_bottom_colors,
+ eCSSProperty_border_left_colors
+ };
+
+ NS_FOR_CSS_SIDES(side) {
+ const nsCSSValue& value = *aRuleData->ValueFor(borderColorsProps[side]);
+ switch (value.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ case eCSSUnit_None:
+ border->ClearBorderColors(side);
+ break;
+
+ case eCSSUnit_Inherit: {
+ conditions.SetUncacheable();
+ border->ClearBorderColors(side);
+ if (parentContext) {
+ nsBorderColors *parentColors;
+ parentBorder->GetCompositeColors(side, &parentColors);
+ if (parentColors) {
+ border->EnsureBorderColors();
+ border->mBorderColors[side] = parentColors->Clone();
+ }
+ }
+ break;
+ }
+
+ case eCSSUnit_List:
+ case eCSSUnit_ListDep: {
+ // Some composite border color information has been specified for this
+ // border side.
+ border->EnsureBorderColors();
+ border->ClearBorderColors(side);
+ const nsCSSValueList* list = value.GetListValue();
+ while (list) {
+ if (SetColor(list->mValue, unused, mPresContext,
+ aContext, borderColor, conditions))
+ border->AppendBorderColor(side, borderColor);
+ else {
+ NS_NOTREACHED("unexpected item in -moz-border-*-colors list");
+ }
+ list = list->mNext;
+ }
+ break;
+ }
+
+ default:
+ MOZ_ASSERT(false, "unrecognized border color unit");
+ }
+ }
+
+ // border-color, border-*-color: color, string, enum, inherit
+ {
+ const nsCSSPropertyID* subprops =
+ nsCSSProps::SubpropertyEntryFor(eCSSProperty_border_color);
+ NS_FOR_CSS_SIDES(side) {
+ SetComplexColor<eUnsetInitial>(*aRuleData->ValueFor(subprops[side]),
+ parentBorder->mBorderColor[side],
+ StyleComplexColor::CurrentColor(),
+ mPresContext,
+ border->mBorderColor[side], conditions);
+ }
+ }
+
+ // border-radius: length, percent, inherit
+ {
+ const nsCSSPropertyID* subprops =
+ nsCSSProps::SubpropertyEntryFor(eCSSProperty_border_radius);
+ NS_FOR_CSS_FULL_CORNERS(corner) {
+ int cx = NS_FULL_TO_HALF_CORNER(corner, false);
+ int cy = NS_FULL_TO_HALF_CORNER(corner, true);
+ const nsCSSValue& radius = *aRuleData->ValueFor(subprops[corner]);
+ nsStyleCoord parentX = parentBorder->mBorderRadius.Get(cx);
+ nsStyleCoord parentY = parentBorder->mBorderRadius.Get(cy);
+ nsStyleCoord coordX, coordY;
+
+ if (SetPairCoords(radius, coordX, coordY, parentX, parentY,
+ SETCOORD_LPH | SETCOORD_INITIAL_ZERO |
+ SETCOORD_STORE_CALC | SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions)) {
+ border->mBorderRadius.Set(cx, coordX);
+ border->mBorderRadius.Set(cy, coordY);
+ }
+ }
+ }
+
+ // float-edge: enum, inherit, initial
+ SetValue(*aRuleData->ValueForFloatEdge(),
+ border->mFloatEdge, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentBorder->mFloatEdge,
+ StyleFloatEdge::ContentBox);
+
+ // border-image-source
+ const nsCSSValue* borderImageSource = aRuleData->ValueForBorderImageSource();
+ if (borderImageSource->GetUnit() == eCSSUnit_Inherit) {
+ conditions.SetUncacheable();
+ border->mBorderImageSource = parentBorder->mBorderImageSource;
+ } else {
+ SetStyleImage(aContext,
+ *borderImageSource,
+ border->mBorderImageSource,
+ conditions);
+ }
+
+ nsCSSValue borderImageSliceValue;
+ nsCSSValue borderImageSliceFill;
+ SetBorderImageSlice(*aRuleData->ValueForBorderImageSlice(),
+ borderImageSliceValue, borderImageSliceFill);
+
+ // border-image-slice: fill
+ SetValue(borderImageSliceFill,
+ border->mBorderImageFill,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentBorder->mBorderImageFill,
+ NS_STYLE_BORDER_IMAGE_SLICE_NOFILL);
+
+ nsCSSRect borderImageSlice;
+ SetBorderImageRect(borderImageSliceValue, borderImageSlice);
+
+ nsCSSRect borderImageWidth;
+ SetBorderImageRect(*aRuleData->ValueForBorderImageWidth(),
+ borderImageWidth);
+
+ nsCSSRect borderImageOutset;
+ SetBorderImageRect(*aRuleData->ValueForBorderImageOutset(),
+ borderImageOutset);
+
+ NS_FOR_CSS_SIDES (side) {
+ // border-image-slice
+ if (SetCoord(borderImageSlice.*(nsCSSRect::sides[side]), coord,
+ parentBorder->mBorderImageSlice.Get(side),
+ SETCOORD_FACTOR | SETCOORD_PERCENT |
+ SETCOORD_INHERIT | SETCOORD_INITIAL_HUNDRED_PCT |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions)) {
+ border->mBorderImageSlice.Set(side, coord);
+ }
+
+ // border-image-width
+ // 'auto' here means "same as slice"
+ if (SetCoord(borderImageWidth.*(nsCSSRect::sides[side]), coord,
+ parentBorder->mBorderImageWidth.Get(side),
+ SETCOORD_LPAH | SETCOORD_FACTOR | SETCOORD_INITIAL_FACTOR_ONE |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions)) {
+ border->mBorderImageWidth.Set(side, coord);
+ }
+
+ // border-image-outset
+ if (SetCoord(borderImageOutset.*(nsCSSRect::sides[side]), coord,
+ parentBorder->mBorderImageOutset.Get(side),
+ SETCOORD_LENGTH | SETCOORD_FACTOR |
+ SETCOORD_INHERIT | SETCOORD_INITIAL_FACTOR_ZERO |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions)) {
+ border->mBorderImageOutset.Set(side, coord);
+ }
+ }
+
+ // border-image-repeat
+ nsCSSValuePair borderImageRepeat;
+ SetBorderImagePair(*aRuleData->ValueForBorderImageRepeat(),
+ borderImageRepeat);
+
+ SetValue(borderImageRepeat.mXValue,
+ border->mBorderImageRepeatH,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentBorder->mBorderImageRepeatH,
+ NS_STYLE_BORDER_IMAGE_REPEAT_STRETCH);
+
+ SetValue(borderImageRepeat.mYValue,
+ border->mBorderImageRepeatV,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentBorder->mBorderImageRepeatV,
+ NS_STYLE_BORDER_IMAGE_REPEAT_STRETCH);
+
+ COMPUTE_END_RESET(Border, border)
+}
+
+const void*
+nsRuleNode::ComputePaddingData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(Padding, padding, parentPadding)
+
+ // padding: length, percent, calc, inherit
+ const nsCSSPropertyID* subprops =
+ nsCSSProps::SubpropertyEntryFor(eCSSProperty_padding);
+ nsStyleCoord coord;
+ NS_FOR_CSS_SIDES(side) {
+ nsStyleCoord parentCoord = parentPadding->mPadding.Get(side);
+ if (SetCoord(*aRuleData->ValueFor(subprops[side]),
+ coord, parentCoord,
+ SETCOORD_LPH | SETCOORD_INITIAL_ZERO | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions)) {
+ padding->mPadding.Set(side, coord);
+ }
+ }
+
+ COMPUTE_END_RESET(Padding, padding)
+}
+
+const void*
+nsRuleNode::ComputeOutlineData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(Outline, outline, parentOutline)
+
+ // outline-width: length, enum, inherit
+ const nsCSSValue* outlineWidthValue = aRuleData->ValueForOutlineWidth();
+ if (eCSSUnit_Initial == outlineWidthValue->GetUnit() ||
+ eCSSUnit_Unset == outlineWidthValue->GetUnit()) {
+ outline->mOutlineWidth =
+ nsStyleCoord(NS_STYLE_BORDER_WIDTH_MEDIUM, eStyleUnit_Enumerated);
+ }
+ else {
+ SetCoord(*outlineWidthValue, outline->mOutlineWidth,
+ parentOutline->mOutlineWidth,
+ SETCOORD_LEH | SETCOORD_CALC_LENGTH_ONLY, aContext,
+ mPresContext, conditions);
+ }
+
+ // outline-offset: length, inherit
+ nsStyleCoord tempCoord;
+ const nsCSSValue* outlineOffsetValue = aRuleData->ValueForOutlineOffset();
+ if (SetCoord(*outlineOffsetValue, tempCoord,
+ nsStyleCoord(parentOutline->mOutlineOffset,
+ nsStyleCoord::CoordConstructor),
+ SETCOORD_LH | SETCOORD_INITIAL_ZERO | SETCOORD_CALC_LENGTH_ONLY |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions)) {
+ outline->mOutlineOffset = tempCoord.GetCoordValue();
+ } else {
+ NS_ASSERTION(outlineOffsetValue->GetUnit() == eCSSUnit_Null,
+ "unexpected unit");
+ }
+
+ // outline-color: color, string, enum, inherit
+ SetComplexColor<eUnsetInitial>(*aRuleData->ValueForOutlineColor(),
+ parentOutline->mOutlineColor,
+ StyleComplexColor::CurrentColor(),
+ mPresContext,
+ outline->mOutlineColor, conditions);
+
+ // -moz-outline-radius: length, percent, inherit
+ {
+ const nsCSSPropertyID* subprops =
+ nsCSSProps::SubpropertyEntryFor(eCSSProperty__moz_outline_radius);
+ NS_FOR_CSS_FULL_CORNERS(corner) {
+ int cx = NS_FULL_TO_HALF_CORNER(corner, false);
+ int cy = NS_FULL_TO_HALF_CORNER(corner, true);
+ const nsCSSValue& radius = *aRuleData->ValueFor(subprops[corner]);
+ nsStyleCoord parentX = parentOutline->mOutlineRadius.Get(cx);
+ nsStyleCoord parentY = parentOutline->mOutlineRadius.Get(cy);
+ nsStyleCoord coordX, coordY;
+
+ if (SetPairCoords(radius, coordX, coordY, parentX, parentY,
+ SETCOORD_LPH | SETCOORD_INITIAL_ZERO |
+ SETCOORD_STORE_CALC | SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions)) {
+ outline->mOutlineRadius.Set(cx, coordX);
+ outline->mOutlineRadius.Set(cy, coordY);
+ }
+ }
+ }
+
+ // outline-style: enum, inherit, initial
+ // cannot use SetValue because of SetOutlineStyle
+ const nsCSSValue* outlineStyleValue = aRuleData->ValueForOutlineStyle();
+ nsCSSUnit unit = outlineStyleValue->GetUnit();
+ MOZ_ASSERT(eCSSUnit_None != unit && eCSSUnit_Auto != unit,
+ "'none' and 'auto' should be handled as enumerated values");
+ if (eCSSUnit_Enumerated == unit) {
+ outline->mOutlineStyle = outlineStyleValue->GetIntValue();
+ } else if (eCSSUnit_Initial == unit ||
+ eCSSUnit_Unset == unit) {
+ outline->mOutlineStyle = NS_STYLE_BORDER_STYLE_NONE;
+ } else if (eCSSUnit_Inherit == unit) {
+ conditions.SetUncacheable();
+ outline->mOutlineStyle = parentOutline->mOutlineStyle;
+ }
+
+ outline->RecalcData();
+ COMPUTE_END_RESET(Outline, outline)
+}
+
+const void*
+nsRuleNode::ComputeListData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_INHERITED(List, list, parentList)
+
+ // quotes: inherit, initial, none, [string string]+
+ const nsCSSValue* quotesValue = aRuleData->ValueForQuotes();
+ switch (quotesValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_Inherit:
+ case eCSSUnit_Unset:
+ conditions.SetUncacheable();
+ list->SetQuotesInherit(parentList);
+ break;
+ case eCSSUnit_Initial:
+ list->SetQuotesInitial();
+ break;
+ case eCSSUnit_None:
+ list->SetQuotesNone();
+ break;
+ case eCSSUnit_PairList:
+ case eCSSUnit_PairListDep: {
+ const nsCSSValuePairList* ourQuotes = quotesValue->GetPairListValue();
+
+ nsStyleQuoteValues::QuotePairArray quotePairs;
+ quotePairs.SetLength(ListLength(ourQuotes));
+
+ size_t index = 0;
+ nsAutoString buffer;
+ while (ourQuotes) {
+ MOZ_ASSERT(ourQuotes->mXValue.GetUnit() == eCSSUnit_String &&
+ ourQuotes->mYValue.GetUnit() == eCSSUnit_String,
+ "improper list contents for quotes");
+ quotePairs[index].first = ourQuotes->mXValue.GetStringValue(buffer);
+ quotePairs[index].second = ourQuotes->mYValue.GetStringValue(buffer);
+ ++index;
+ ourQuotes = ourQuotes->mNext;
+ }
+ list->SetQuotes(Move(quotePairs));
+ break;
+ }
+ default:
+ MOZ_ASSERT(false, "unexpected value unit");
+ }
+
+ // list-style-type: string, none, inherit, initial
+ const nsCSSValue* typeValue = aRuleData->ValueForListStyleType();
+ switch (typeValue->GetUnit()) {
+ case eCSSUnit_Unset:
+ case eCSSUnit_Inherit: {
+ conditions.SetUncacheable();
+ list->SetCounterStyle(parentList->GetCounterStyle());
+ break;
+ }
+ case eCSSUnit_Initial:
+ list->SetListStyleType(NS_LITERAL_STRING("disc"), mPresContext);
+ break;
+ case eCSSUnit_Ident: {
+ nsString typeIdent;
+ typeValue->GetStringValue(typeIdent);
+ list->SetListStyleType(typeIdent, mPresContext);
+ break;
+ }
+ case eCSSUnit_String: {
+ nsString str;
+ typeValue->GetStringValue(str);
+ list->SetCounterStyle(new AnonymousCounterStyle(str));
+ break;
+ }
+ case eCSSUnit_Enumerated: {
+ // For compatibility with html attribute map.
+ // This branch should never be called for value from CSS.
+ int32_t intValue = typeValue->GetIntValue();
+ nsAutoString name;
+ switch (intValue) {
+ case NS_STYLE_LIST_STYLE_LOWER_ROMAN:
+ name.AssignLiteral(u"lower-roman");
+ break;
+ case NS_STYLE_LIST_STYLE_UPPER_ROMAN:
+ name.AssignLiteral(u"upper-roman");
+ break;
+ case NS_STYLE_LIST_STYLE_LOWER_ALPHA:
+ name.AssignLiteral(u"lower-alpha");
+ break;
+ case NS_STYLE_LIST_STYLE_UPPER_ALPHA:
+ name.AssignLiteral(u"upper-alpha");
+ break;
+ default:
+ CopyASCIItoUTF16(nsCSSProps::ValueToKeyword(
+ intValue, nsCSSProps::kListStyleKTable), name);
+ break;
+ }
+ list->SetListStyleType(name, mPresContext);
+ break;
+ }
+ case eCSSUnit_Symbols:
+ list->SetCounterStyle(new AnonymousCounterStyle(typeValue->GetArrayValue()));
+ break;
+ case eCSSUnit_Null:
+ break;
+ default:
+ NS_NOTREACHED("Unexpected value unit");
+ }
+
+ // list-style-image: url, none, inherit
+ const nsCSSValue* imageValue = aRuleData->ValueForListStyleImage();
+ if (eCSSUnit_Image == imageValue->GetUnit()) {
+ SetStyleImageRequest([&](nsStyleImageRequest* req) {
+ list->mListStyleImage = req;
+ }, mPresContext, *imageValue, nsStyleImageRequest::Mode(0));
+ }
+ else if (eCSSUnit_None == imageValue->GetUnit() ||
+ eCSSUnit_Initial == imageValue->GetUnit()) {
+ list->mListStyleImage = nullptr;
+ }
+ else if (eCSSUnit_Inherit == imageValue->GetUnit() ||
+ eCSSUnit_Unset == imageValue->GetUnit()) {
+ conditions.SetUncacheable();
+ list->mListStyleImage = parentList->mListStyleImage;
+ }
+
+ // list-style-position: enum, inherit, initial
+ SetValue(*aRuleData->ValueForListStylePosition(),
+ list->mListStylePosition, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentList->mListStylePosition,
+ NS_STYLE_LIST_STYLE_POSITION_OUTSIDE);
+
+ // image region property: length, auto, inherit
+ const nsCSSValue* imageRegionValue = aRuleData->ValueForImageRegion();
+ switch (imageRegionValue->GetUnit()) {
+ case eCSSUnit_Inherit:
+ case eCSSUnit_Unset:
+ conditions.SetUncacheable();
+ list->mImageRegion = parentList->mImageRegion;
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Auto:
+ list->mImageRegion.SetRect(0,0,0,0);
+ break;
+
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Rect: {
+ const nsCSSRect& rgnRect = imageRegionValue->GetRectValue();
+
+ if (rgnRect.mTop.GetUnit() == eCSSUnit_Auto)
+ list->mImageRegion.y = 0;
+ else if (rgnRect.mTop.IsLengthUnit())
+ list->mImageRegion.y =
+ CalcLength(rgnRect.mTop, aContext, mPresContext, conditions);
+
+ if (rgnRect.mBottom.GetUnit() == eCSSUnit_Auto)
+ list->mImageRegion.height = 0;
+ else if (rgnRect.mBottom.IsLengthUnit())
+ list->mImageRegion.height =
+ CalcLength(rgnRect.mBottom, aContext, mPresContext,
+ conditions) - list->mImageRegion.y;
+
+ if (rgnRect.mLeft.GetUnit() == eCSSUnit_Auto)
+ list->mImageRegion.x = 0;
+ else if (rgnRect.mLeft.IsLengthUnit())
+ list->mImageRegion.x =
+ CalcLength(rgnRect.mLeft, aContext, mPresContext, conditions);
+
+ if (rgnRect.mRight.GetUnit() == eCSSUnit_Auto)
+ list->mImageRegion.width = 0;
+ else if (rgnRect.mRight.IsLengthUnit())
+ list->mImageRegion.width =
+ CalcLength(rgnRect.mRight, aContext, mPresContext,
+ conditions) - list->mImageRegion.x;
+ break;
+ }
+
+ default:
+ MOZ_ASSERT(false, "unrecognized image-region unit");
+ }
+
+ COMPUTE_END_INHERITED(List, list)
+}
+
+static void
+SetGridTrackBreadth(const nsCSSValue& aValue,
+ nsStyleCoord& aResult,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+{
+ nsCSSUnit unit = aValue.GetUnit();
+ if (unit == eCSSUnit_FlexFraction) {
+ aResult.SetFlexFractionValue(aValue.GetFloatValue());
+ } else if (unit == eCSSUnit_Auto) {
+ aResult.SetAutoValue();
+ } else if (unit == eCSSUnit_None) {
+ // For fit-content().
+ aResult.SetNoneValue();
+ } else {
+ MOZ_ASSERT(unit != eCSSUnit_Inherit && unit != eCSSUnit_Unset,
+ "Unexpected value that would use dummyParentCoord");
+ const nsStyleCoord dummyParentCoord;
+ DebugOnly<bool> stored =
+ SetCoord(aValue, aResult, dummyParentCoord,
+ SETCOORD_LPE | SETCOORD_STORE_CALC,
+ aStyleContext, aPresContext, aConditions);
+ MOZ_ASSERT(stored, "invalid <track-size> value");
+ }
+}
+
+static void
+SetGridTrackSize(const nsCSSValue& aValue,
+ nsStyleCoord& aResultMin,
+ nsStyleCoord& aResultMax,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+{
+ if (aValue.GetUnit() == eCSSUnit_Function) {
+ nsCSSValue::Array* func = aValue.GetArrayValue();
+ auto funcName = func->Item(0).GetKeywordValue();
+ if (funcName == eCSSKeyword_minmax) {
+ SetGridTrackBreadth(func->Item(1), aResultMin,
+ aStyleContext, aPresContext, aConditions);
+ SetGridTrackBreadth(func->Item(2), aResultMax,
+ aStyleContext, aPresContext, aConditions);
+ } else if (funcName == eCSSKeyword_fit_content) {
+ // We represent fit-content(L) as 'none' min-sizing and L max-sizing.
+ SetGridTrackBreadth(nsCSSValue(eCSSUnit_None), aResultMin,
+ aStyleContext, aPresContext, aConditions);
+ SetGridTrackBreadth(func->Item(1), aResultMax,
+ aStyleContext, aPresContext, aConditions);
+ } else {
+ NS_ERROR("Expected minmax() or fit-content(), got another function name");
+ }
+ } else {
+ // A single <track-breadth>,
+ // specifies identical min and max sizing functions.
+ SetGridTrackBreadth(aValue, aResultMin,
+ aStyleContext, aPresContext, aConditions);
+ aResultMax = aResultMin;
+ }
+}
+
+static void
+SetGridAutoColumnsRows(const nsCSSValue& aValue,
+ nsStyleCoord& aResultMin,
+ nsStyleCoord& aResultMax,
+ const nsStyleCoord& aParentValueMin,
+ const nsStyleCoord& aParentValueMax,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+
+{
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Inherit:
+ aConditions.SetUncacheable();
+ aResultMin = aParentValueMin;
+ aResultMax = aParentValueMax;
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ // The initial value is 'auto',
+ // which computes to 'minmax(auto, auto)'.
+ // (Explicitly-specified 'auto' values are handled in SetGridTrackSize.)
+ aResultMin.SetAutoValue();
+ aResultMax.SetAutoValue();
+ break;
+
+ default:
+ SetGridTrackSize(aValue, aResultMin, aResultMax,
+ aStyleContext, aPresContext, aConditions);
+ }
+}
+
+static void
+AppendGridLineNames(const nsCSSValue& aValue,
+ nsTArray<nsString>& aNameList)
+{
+ // Compute a <line-names> value
+ // Null unit means empty list, nothing more to do.
+ if (aValue.GetUnit() != eCSSUnit_Null) {
+ const nsCSSValueList* item = aValue.GetListValue();
+ do {
+ nsString* name = aNameList.AppendElement();
+ item->mValue.GetStringValue(*name);
+ item = item->mNext;
+ } while (item);
+ }
+}
+
+static void
+SetGridTrackList(const nsCSSValue& aValue,
+ nsStyleGridTemplate& aResult,
+ const nsStyleGridTemplate& aParentValue,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+
+{
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Inherit:
+ aConditions.SetUncacheable();
+ aResult.mIsSubgrid = aParentValue.mIsSubgrid;
+ aResult.mLineNameLists = aParentValue.mLineNameLists;
+ aResult.mMinTrackSizingFunctions = aParentValue.mMinTrackSizingFunctions;
+ aResult.mMaxTrackSizingFunctions = aParentValue.mMaxTrackSizingFunctions;
+ aResult.mRepeatAutoLineNameListBefore = aParentValue.mRepeatAutoLineNameListBefore;
+ aResult.mRepeatAutoLineNameListAfter = aParentValue.mRepeatAutoLineNameListAfter;
+ aResult.mRepeatAutoIndex = aParentValue.mRepeatAutoIndex;
+ aResult.mIsAutoFill = aParentValue.mIsAutoFill;
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ case eCSSUnit_None:
+ aResult.mIsSubgrid = false;
+ aResult.mLineNameLists.Clear();
+ aResult.mMinTrackSizingFunctions.Clear();
+ aResult.mMaxTrackSizingFunctions.Clear();
+ aResult.mRepeatAutoLineNameListBefore.Clear();
+ aResult.mRepeatAutoLineNameListAfter.Clear();
+ aResult.mRepeatAutoIndex = -1;
+ aResult.mIsAutoFill = false;
+ break;
+
+ default:
+ aResult.mLineNameLists.Clear();
+ aResult.mMinTrackSizingFunctions.Clear();
+ aResult.mMaxTrackSizingFunctions.Clear();
+ aResult.mRepeatAutoLineNameListBefore.Clear();
+ aResult.mRepeatAutoLineNameListAfter.Clear();
+ aResult.mRepeatAutoIndex = -1;
+ aResult.mIsAutoFill = false;
+ const nsCSSValueList* item = aValue.GetListValue();
+ if (item->mValue.GetUnit() == eCSSUnit_Enumerated &&
+ item->mValue.GetIntValue() == NS_STYLE_GRID_TEMPLATE_SUBGRID) {
+ // subgrid <line-name-list>?
+ aResult.mIsSubgrid = true;
+ item = item->mNext;
+ for (int32_t i = 0; item && i < nsStyleGridLine::kMaxLine; ++i) {
+ if (item->mValue.GetUnit() == eCSSUnit_Pair) {
+ // This is a 'auto-fill' <name-repeat> expression.
+ const nsCSSValuePair& pair = item->mValue.GetPairValue();
+ MOZ_ASSERT(aResult.mRepeatAutoIndex == -1,
+ "can only have one <name-repeat> with auto-fill");
+ aResult.mRepeatAutoIndex = i;
+ aResult.mIsAutoFill = true;
+ MOZ_ASSERT(pair.mXValue.GetIntValue() == NS_STYLE_GRID_REPEAT_AUTO_FILL,
+ "unexpected repeat() enum value for subgrid");
+ const nsCSSValueList* list = pair.mYValue.GetListValue();
+ AppendGridLineNames(list->mValue, aResult.mRepeatAutoLineNameListBefore);
+ } else {
+ AppendGridLineNames(item->mValue,
+ *aResult.mLineNameLists.AppendElement());
+ }
+ item = item->mNext;
+ }
+ } else {
+ // <track-list>
+ // The list is expected to have odd number of items, at least 3
+ // starting with a <line-names> (sub list of identifiers),
+ // and alternating between that and <track-size>.
+ aResult.mIsSubgrid = false;
+ for (int32_t line = 1; ; ++line) {
+ AppendGridLineNames(item->mValue,
+ *aResult.mLineNameLists.AppendElement());
+ item = item->mNext;
+
+ if (!item || line == nsStyleGridLine::kMaxLine) {
+ break;
+ }
+
+ if (item->mValue.GetUnit() == eCSSUnit_Pair) {
+ // This is a 'auto-fill' / 'auto-fit' <auto-repeat> expression.
+ const nsCSSValuePair& pair = item->mValue.GetPairValue();
+ MOZ_ASSERT(aResult.mRepeatAutoIndex == -1,
+ "can only have one <auto-repeat>");
+ aResult.mRepeatAutoIndex = line - 1;
+ switch (pair.mXValue.GetIntValue()) {
+ case NS_STYLE_GRID_REPEAT_AUTO_FILL:
+ aResult.mIsAutoFill = true;
+ break;
+ case NS_STYLE_GRID_REPEAT_AUTO_FIT:
+ aResult.mIsAutoFill = false;
+ break;
+ default:
+ MOZ_ASSERT_UNREACHABLE("unexpected repeat() enum value");
+ }
+ const nsCSSValueList* list = pair.mYValue.GetListValue();
+ AppendGridLineNames(list->mValue, aResult.mRepeatAutoLineNameListBefore);
+ list = list->mNext;
+ nsStyleCoord& min = *aResult.mMinTrackSizingFunctions.AppendElement();
+ nsStyleCoord& max = *aResult.mMaxTrackSizingFunctions.AppendElement();
+ SetGridTrackSize(list->mValue, min, max,
+ aStyleContext, aPresContext, aConditions);
+ list = list->mNext;
+ AppendGridLineNames(list->mValue, aResult.mRepeatAutoLineNameListAfter);
+ } else {
+ nsStyleCoord& min = *aResult.mMinTrackSizingFunctions.AppendElement();
+ nsStyleCoord& max = *aResult.mMaxTrackSizingFunctions.AppendElement();
+ SetGridTrackSize(item->mValue, min, max,
+ aStyleContext, aPresContext, aConditions);
+ }
+
+ item = item->mNext;
+ MOZ_ASSERT(item, "Expected a eCSSUnit_List of odd length");
+ }
+ MOZ_ASSERT(!aResult.mMinTrackSizingFunctions.IsEmpty() &&
+ aResult.mMinTrackSizingFunctions.Length() ==
+ aResult.mMaxTrackSizingFunctions.Length() &&
+ aResult.mMinTrackSizingFunctions.Length() + 1 ==
+ aResult.mLineNameLists.Length(),
+ "Inconstistent array lengths for nsStyleGridTemplate");
+ }
+ }
+}
+
+static void
+SetGridTemplateAreas(const nsCSSValue& aValue,
+ RefPtr<css::GridTemplateAreasValue>* aResult,
+ css::GridTemplateAreasValue* aParentValue,
+ RuleNodeCacheConditions& aConditions)
+{
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Inherit:
+ aConditions.SetUncacheable();
+ *aResult = aParentValue;
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ case eCSSUnit_None:
+ *aResult = nullptr;
+ break;
+
+ default:
+ *aResult = aValue.GetGridTemplateAreas();
+ }
+}
+
+static void
+SetGridLine(const nsCSSValue& aValue,
+ nsStyleGridLine& aResult,
+ const nsStyleGridLine& aParentValue,
+ RuleNodeCacheConditions& aConditions)
+
+{
+ switch (aValue.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Inherit:
+ aConditions.SetUncacheable();
+ aResult = aParentValue;
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ case eCSSUnit_Auto:
+ aResult.SetAuto();
+ break;
+
+ default:
+ aResult.SetAuto(); // Reset any existing value.
+ const nsCSSValueList* item = aValue.GetListValue();
+ do {
+ if (item->mValue.GetUnit() == eCSSUnit_Enumerated) {
+ aResult.mHasSpan = true;
+ } else if (item->mValue.GetUnit() == eCSSUnit_Integer) {
+ aResult.mInteger = clamped(item->mValue.GetIntValue(),
+ nsStyleGridLine::kMinLine,
+ nsStyleGridLine::kMaxLine);
+ } else if (item->mValue.GetUnit() == eCSSUnit_Ident) {
+ item->mValue.GetStringValue(aResult.mLineName);
+ } else {
+ NS_ASSERTION(false, "Unexpected unit");
+ }
+ item = item->mNext;
+ } while (item);
+ MOZ_ASSERT(!aResult.IsAuto(),
+ "should have set something away from default value");
+ }
+}
+
+const void*
+nsRuleNode::ComputePositionData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(Position, pos, parentPos)
+
+ // box offsets: length, percent, calc, auto, inherit
+ static const nsCSSPropertyID offsetProps[] = {
+ eCSSProperty_top,
+ eCSSProperty_right,
+ eCSSProperty_bottom,
+ eCSSProperty_left
+ };
+ nsStyleCoord coord;
+ NS_FOR_CSS_SIDES(side) {
+ nsStyleCoord parentCoord = parentPos->mOffset.Get(side);
+ if (SetCoord(*aRuleData->ValueFor(offsetProps[side]),
+ coord, parentCoord,
+ SETCOORD_LPAH | SETCOORD_INITIAL_AUTO | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions)) {
+ pos->mOffset.Set(side, coord);
+ }
+ }
+
+ // We allow the enumerated box size property values -moz-min-content, etc. to
+ // be specified on both the {,min-,max-}width properties and the
+ // {,min-,max-}height properties, regardless of the writing mode. This is
+ // because the writing mode is not determined until here, at computed value
+ // time. Since we do not support layout behavior of these keywords on the
+ // block-axis properties, we turn them into unset if we find them in
+ // that case.
+
+ WritingMode wm(aContext);
+ bool vertical = wm.IsVertical();
+
+ const nsCSSValue* width = aRuleData->ValueForWidth();
+ if (width->GetUnit() == eCSSUnit_Enumerated) {
+ conditions.SetWritingModeDependency(wm.GetBits());
+ }
+ SetCoord(width->GetUnit() == eCSSUnit_Enumerated && vertical ?
+ nsCSSValue(eCSSUnit_Unset) : *width,
+ pos->mWidth, parentPos->mWidth,
+ SETCOORD_LPAEH | SETCOORD_INITIAL_AUTO | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+
+ const nsCSSValue* minWidth = aRuleData->ValueForMinWidth();
+ if (minWidth->GetUnit() == eCSSUnit_Enumerated) {
+ conditions.SetWritingModeDependency(wm.GetBits());
+ }
+ SetCoord(minWidth->GetUnit() == eCSSUnit_Enumerated && vertical ?
+ nsCSSValue(eCSSUnit_Unset) : *minWidth,
+ pos->mMinWidth, parentPos->mMinWidth,
+ SETCOORD_LPAEH | SETCOORD_INITIAL_AUTO | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+
+ const nsCSSValue* maxWidth = aRuleData->ValueForMaxWidth();
+ if (maxWidth->GetUnit() == eCSSUnit_Enumerated) {
+ conditions.SetWritingModeDependency(wm.GetBits());
+ }
+ SetCoord(maxWidth->GetUnit() == eCSSUnit_Enumerated && vertical ?
+ nsCSSValue(eCSSUnit_Unset) : *maxWidth,
+ pos->mMaxWidth, parentPos->mMaxWidth,
+ SETCOORD_LPOEH | SETCOORD_INITIAL_NONE | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+
+ const nsCSSValue* height = aRuleData->ValueForHeight();
+ if (height->GetUnit() == eCSSUnit_Enumerated) {
+ conditions.SetWritingModeDependency(wm.GetBits());
+ }
+ SetCoord(height->GetUnit() == eCSSUnit_Enumerated && !vertical ?
+ nsCSSValue(eCSSUnit_Unset) : *height,
+ pos->mHeight, parentPos->mHeight,
+ SETCOORD_LPAEH | SETCOORD_INITIAL_AUTO | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+
+ const nsCSSValue* minHeight = aRuleData->ValueForMinHeight();
+ if (minHeight->GetUnit() == eCSSUnit_Enumerated) {
+ conditions.SetWritingModeDependency(wm.GetBits());
+ }
+ SetCoord(minHeight->GetUnit() == eCSSUnit_Enumerated && !vertical ?
+ nsCSSValue(eCSSUnit_Unset) : *minHeight,
+ pos->mMinHeight, parentPos->mMinHeight,
+ SETCOORD_LPAEH | SETCOORD_INITIAL_AUTO | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+
+ const nsCSSValue* maxHeight = aRuleData->ValueForMaxHeight();
+ if (maxHeight->GetUnit() == eCSSUnit_Enumerated) {
+ conditions.SetWritingModeDependency(wm.GetBits());
+ }
+ SetCoord(maxHeight->GetUnit() == eCSSUnit_Enumerated && !vertical ?
+ nsCSSValue(eCSSUnit_Unset) : *maxHeight,
+ pos->mMaxHeight, parentPos->mMaxHeight,
+ SETCOORD_LPOEH | SETCOORD_INITIAL_NONE | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+
+ // box-sizing: enum, inherit, initial
+ SetValue(*aRuleData->ValueForBoxSizing(),
+ pos->mBoxSizing, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentPos->mBoxSizing,
+ StyleBoxSizing::Content);
+
+ // align-content: enum, inherit, initial
+ SetValue(*aRuleData->ValueForAlignContent(),
+ pos->mAlignContent, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentPos->mAlignContent,
+ NS_STYLE_ALIGN_NORMAL);
+
+ // align-items: enum, inherit, initial
+ SetValue(*aRuleData->ValueForAlignItems(),
+ pos->mAlignItems, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentPos->mAlignItems,
+ NS_STYLE_ALIGN_NORMAL);
+
+ // align-self: enum, inherit, initial
+ SetValue(*aRuleData->ValueForAlignSelf(),
+ pos->mAlignSelf, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentPos->mAlignSelf,
+ NS_STYLE_ALIGN_AUTO);
+
+ // justify-content: enum, inherit, initial
+ SetValue(*aRuleData->ValueForJustifyContent(),
+ pos->mJustifyContent, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentPos->mJustifyContent,
+ NS_STYLE_JUSTIFY_NORMAL);
+
+ // justify-items: enum, inherit, initial
+ const auto& justifyItemsValue = *aRuleData->ValueForJustifyItems();
+ if (MOZ_UNLIKELY(justifyItemsValue.GetUnit() == eCSSUnit_Inherit)) {
+ if (MOZ_LIKELY(parentContext)) {
+ pos->mJustifyItems =
+ parentPos->ComputedJustifyItems(parentContext->GetParent());
+ } else {
+ pos->mJustifyItems = NS_STYLE_JUSTIFY_NORMAL;
+ }
+ conditions.SetUncacheable();
+ } else {
+ SetValue(justifyItemsValue,
+ pos->mJustifyItems, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentPos->mJustifyItems, // unused, we handle 'inherit' above
+ NS_STYLE_JUSTIFY_AUTO);
+ }
+
+ // justify-self: enum, inherit, initial
+ SetValue(*aRuleData->ValueForJustifySelf(),
+ pos->mJustifySelf, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentPos->mJustifySelf,
+ NS_STYLE_JUSTIFY_AUTO);
+
+ // flex-basis: auto, length, percent, enum, calc, inherit, initial
+ // (Note: The flags here should match those used for 'width' property above.)
+ SetCoord(*aRuleData->ValueForFlexBasis(), pos->mFlexBasis, parentPos->mFlexBasis,
+ SETCOORD_LPAEH | SETCOORD_INITIAL_AUTO | SETCOORD_STORE_CALC |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+
+ // flex-direction: enum, inherit, initial
+ SetValue(*aRuleData->ValueForFlexDirection(),
+ pos->mFlexDirection, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentPos->mFlexDirection,
+ NS_STYLE_FLEX_DIRECTION_ROW);
+
+ // flex-grow: float, inherit, initial
+ SetFactor(*aRuleData->ValueForFlexGrow(),
+ pos->mFlexGrow, conditions,
+ parentPos->mFlexGrow, 0.0f,
+ SETFCT_UNSET_INITIAL);
+
+ // flex-shrink: float, inherit, initial
+ SetFactor(*aRuleData->ValueForFlexShrink(),
+ pos->mFlexShrink, conditions,
+ parentPos->mFlexShrink, 1.0f,
+ SETFCT_UNSET_INITIAL);
+
+ // flex-wrap: enum, inherit, initial
+ SetValue(*aRuleData->ValueForFlexWrap(),
+ pos->mFlexWrap, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentPos->mFlexWrap,
+ NS_STYLE_FLEX_WRAP_NOWRAP);
+
+ // order: integer, inherit, initial
+ SetValue(*aRuleData->ValueForOrder(),
+ pos->mOrder, conditions,
+ SETVAL_INTEGER | SETVAL_UNSET_INITIAL,
+ parentPos->mOrder,
+ NS_STYLE_ORDER_INITIAL);
+
+ // object-fit: enum, inherit, initial
+ SetValue(*aRuleData->ValueForObjectFit(),
+ pos->mObjectFit, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentPos->mObjectFit,
+ NS_STYLE_OBJECT_FIT_FILL);
+
+ // object-position
+ const nsCSSValue& objectPosition = *aRuleData->ValueForObjectPosition();
+ switch (objectPosition.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_Inherit:
+ conditions.SetUncacheable();
+ pos->mObjectPosition = parentPos->mObjectPosition;
+ break;
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ pos->mObjectPosition.SetInitialPercentValues(0.5f);
+ break;
+ default:
+ ComputePositionValue(aContext, objectPosition,
+ pos->mObjectPosition, conditions);
+ }
+
+ // grid-auto-flow
+ const nsCSSValue& gridAutoFlow = *aRuleData->ValueForGridAutoFlow();
+ switch (gridAutoFlow.GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_Inherit:
+ conditions.SetUncacheable();
+ pos->mGridAutoFlow = parentPos->mGridAutoFlow;
+ break;
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ pos->mGridAutoFlow = NS_STYLE_GRID_AUTO_FLOW_ROW;
+ break;
+ default:
+ NS_ASSERTION(gridAutoFlow.GetUnit() == eCSSUnit_Enumerated,
+ "Unexpected unit");
+ pos->mGridAutoFlow = gridAutoFlow.GetIntValue();
+ }
+
+ // grid-auto-columns
+ SetGridAutoColumnsRows(*aRuleData->ValueForGridAutoColumns(),
+ pos->mGridAutoColumnsMin,
+ pos->mGridAutoColumnsMax,
+ parentPos->mGridAutoColumnsMin,
+ parentPos->mGridAutoColumnsMax,
+ aContext, mPresContext, conditions);
+
+ // grid-auto-rows
+ SetGridAutoColumnsRows(*aRuleData->ValueForGridAutoRows(),
+ pos->mGridAutoRowsMin,
+ pos->mGridAutoRowsMax,
+ parentPos->mGridAutoRowsMin,
+ parentPos->mGridAutoRowsMax,
+ aContext, mPresContext, conditions);
+
+ // grid-template-columns
+ SetGridTrackList(*aRuleData->ValueForGridTemplateColumns(),
+ pos->mGridTemplateColumns, parentPos->mGridTemplateColumns,
+ aContext, mPresContext, conditions);
+
+ // grid-template-rows
+ SetGridTrackList(*aRuleData->ValueForGridTemplateRows(),
+ pos->mGridTemplateRows, parentPos->mGridTemplateRows,
+ aContext, mPresContext, conditions);
+
+ // grid-tempate-areas
+ SetGridTemplateAreas(*aRuleData->ValueForGridTemplateAreas(),
+ &pos->mGridTemplateAreas,
+ parentPos->mGridTemplateAreas,
+ conditions);
+
+ // grid-column-start
+ SetGridLine(*aRuleData->ValueForGridColumnStart(),
+ pos->mGridColumnStart,
+ parentPos->mGridColumnStart,
+ conditions);
+
+ // grid-column-end
+ SetGridLine(*aRuleData->ValueForGridColumnEnd(),
+ pos->mGridColumnEnd,
+ parentPos->mGridColumnEnd,
+ conditions);
+
+ // grid-row-start
+ SetGridLine(*aRuleData->ValueForGridRowStart(),
+ pos->mGridRowStart,
+ parentPos->mGridRowStart,
+ conditions);
+
+ // grid-row-end
+ SetGridLine(*aRuleData->ValueForGridRowEnd(),
+ pos->mGridRowEnd,
+ parentPos->mGridRowEnd,
+ conditions);
+
+ // grid-column-gap
+ if (SetCoord(*aRuleData->ValueForGridColumnGap(),
+ pos->mGridColumnGap, parentPos->mGridColumnGap,
+ SETCOORD_LPH | SETCOORD_INITIAL_ZERO | SETCOORD_STORE_CALC |
+ SETCOORD_CALC_CLAMP_NONNEGATIVE | SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions)) {
+ } else {
+ MOZ_ASSERT(aRuleData->ValueForGridColumnGap()->GetUnit() == eCSSUnit_Null,
+ "unexpected unit");
+ }
+
+ // grid-row-gap
+ if (SetCoord(*aRuleData->ValueForGridRowGap(),
+ pos->mGridRowGap, parentPos->mGridRowGap,
+ SETCOORD_LPH | SETCOORD_INITIAL_ZERO | SETCOORD_STORE_CALC |
+ SETCOORD_CALC_CLAMP_NONNEGATIVE | SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions)) {
+ } else {
+ MOZ_ASSERT(aRuleData->ValueForGridRowGap()->GetUnit() == eCSSUnit_Null,
+ "unexpected unit");
+ }
+
+ // z-index
+ const nsCSSValue* zIndexValue = aRuleData->ValueForZIndex();
+ if (! SetCoord(*zIndexValue, pos->mZIndex, parentPos->mZIndex,
+ SETCOORD_IA | SETCOORD_INITIAL_AUTO | SETCOORD_UNSET_INITIAL,
+ aContext, nullptr, conditions)) {
+ if (eCSSUnit_Inherit == zIndexValue->GetUnit()) {
+ // handle inherit, because it's ok to inherit 'auto' here
+ conditions.SetUncacheable();
+ pos->mZIndex = parentPos->mZIndex;
+ }
+ }
+
+ COMPUTE_END_RESET(Position, pos)
+}
+
+const void*
+nsRuleNode::ComputeTableData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(Table, table, parentTable)
+
+ // table-layout: enum, inherit, initial
+ SetValue(*aRuleData->ValueForTableLayout(),
+ table->mLayoutStrategy, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentTable->mLayoutStrategy,
+ NS_STYLE_TABLE_LAYOUT_AUTO);
+
+ // span: pixels (not a real CSS prop)
+ const nsCSSValue* spanValue = aRuleData->ValueForSpan();
+ if (eCSSUnit_Enumerated == spanValue->GetUnit() ||
+ eCSSUnit_Integer == spanValue->GetUnit())
+ table->mSpan = spanValue->GetIntValue();
+
+ COMPUTE_END_RESET(Table, table)
+}
+
+const void*
+nsRuleNode::ComputeTableBorderData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_INHERITED(TableBorder, table, parentTable)
+
+ // border-collapse: enum, inherit, initial
+ SetValue(*aRuleData->ValueForBorderCollapse(), table->mBorderCollapse,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentTable->mBorderCollapse,
+ NS_STYLE_BORDER_SEPARATE);
+
+ const nsCSSValue* borderSpacingValue = aRuleData->ValueForBorderSpacing();
+ // border-spacing: pair(length), inherit
+ if (borderSpacingValue->GetUnit() != eCSSUnit_Null) {
+ nsStyleCoord parentCol(parentTable->mBorderSpacingCol,
+ nsStyleCoord::CoordConstructor);
+ nsStyleCoord parentRow(parentTable->mBorderSpacingRow,
+ nsStyleCoord::CoordConstructor);
+ nsStyleCoord coordCol, coordRow;
+
+#ifdef DEBUG
+ bool result =
+#endif
+ SetPairCoords(*borderSpacingValue,
+ coordCol, coordRow, parentCol, parentRow,
+ SETCOORD_LH | SETCOORD_INITIAL_ZERO |
+ SETCOORD_CALC_LENGTH_ONLY |
+ SETCOORD_CALC_CLAMP_NONNEGATIVE | SETCOORD_UNSET_INHERIT,
+ aContext, mPresContext, conditions);
+ NS_ASSERTION(result, "malformed table border value");
+ table->mBorderSpacingCol = coordCol.GetCoordValue();
+ table->mBorderSpacingRow = coordRow.GetCoordValue();
+ }
+
+ // caption-side: enum, inherit, initial
+ SetValue(*aRuleData->ValueForCaptionSide(),
+ table->mCaptionSide, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentTable->mCaptionSide,
+ NS_STYLE_CAPTION_SIDE_TOP);
+
+ // empty-cells: enum, inherit, initial
+ SetValue(*aRuleData->ValueForEmptyCells(),
+ table->mEmptyCells, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentTable->mEmptyCells,
+ NS_STYLE_TABLE_EMPTY_CELLS_SHOW);
+
+ COMPUTE_END_INHERITED(TableBorder, table)
+}
+
+const void*
+nsRuleNode::ComputeContentData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ uint32_t count;
+ nsAutoString buffer;
+
+ COMPUTE_START_RESET(Content, content, parentContent)
+
+ // content: [string, url, counter, attr, enum]+, normal, none, inherit
+ const nsCSSValue* contentValue = aRuleData->ValueForContent();
+ switch (contentValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Normal:
+ case eCSSUnit_None:
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ // "normal", "none", "initial" and "unset" all mean no content
+ content->AllocateContents(0);
+ break;
+
+ case eCSSUnit_Inherit:
+ conditions.SetUncacheable();
+ count = parentContent->ContentCount();
+ content->AllocateContents(count);
+ while (0 < count--) {
+ content->ContentAt(count) = parentContent->ContentAt(count);
+ }
+ break;
+
+ case eCSSUnit_Enumerated: {
+ MOZ_ASSERT(contentValue->GetIntValue() == NS_STYLE_CONTENT_ALT_CONTENT,
+ "unrecognized solitary content keyword");
+ content->AllocateContents(1);
+ nsStyleContentData& data = content->ContentAt(0);
+ data.mType = eStyleContentType_AltContent;
+ data.mContent.mString = nullptr;
+ break;
+ }
+
+ case eCSSUnit_List:
+ case eCSSUnit_ListDep: {
+ const nsCSSValueList* contentValueList = contentValue->GetListValue();
+ count = 0;
+ while (contentValueList) {
+ count++;
+ contentValueList = contentValueList->mNext;
+ }
+ content->AllocateContents(count);
+ const nsAutoString nullStr;
+ count = 0;
+ contentValueList = contentValue->GetListValue();
+ while (contentValueList) {
+ const nsCSSValue& value = contentValueList->mValue;
+ nsCSSUnit unit = value.GetUnit();
+ nsStyleContentType type;
+ nsStyleContentData &data = content->ContentAt(count++);
+ switch (unit) {
+ case eCSSUnit_String: type = eStyleContentType_String; break;
+ case eCSSUnit_Image: type = eStyleContentType_Image; break;
+ case eCSSUnit_Attr: type = eStyleContentType_Attr; break;
+ case eCSSUnit_Counter: type = eStyleContentType_Counter; break;
+ case eCSSUnit_Counters: type = eStyleContentType_Counters; break;
+ case eCSSUnit_Enumerated:
+ switch (value.GetIntValue()) {
+ case NS_STYLE_CONTENT_OPEN_QUOTE:
+ type = eStyleContentType_OpenQuote; break;
+ case NS_STYLE_CONTENT_CLOSE_QUOTE:
+ type = eStyleContentType_CloseQuote; break;
+ case NS_STYLE_CONTENT_NO_OPEN_QUOTE:
+ type = eStyleContentType_NoOpenQuote; break;
+ case NS_STYLE_CONTENT_NO_CLOSE_QUOTE:
+ type = eStyleContentType_NoCloseQuote; break;
+ default:
+ NS_ERROR("bad content value");
+ type = eStyleContentType_Uninitialized;
+ }
+ break;
+ default:
+ NS_ERROR("bad content type");
+ type = eStyleContentType_Uninitialized;
+ }
+ data.mType = type;
+ if (type == eStyleContentType_Image) {
+ SetImageRequest([&](imgRequestProxy* req) {
+ data.SetImage(req);
+ }, mPresContext, value);
+ } else if (type <= eStyleContentType_Attr) {
+ value.GetStringValue(buffer);
+ data.mContent.mString = NS_strdup(buffer.get());
+ } else if (type <= eStyleContentType_Counters) {
+ data.mContent.mCounters = value.GetArrayValue();
+ data.mContent.mCounters->AddRef();
+ } else {
+ data.mContent.mString = nullptr;
+ }
+ contentValueList = contentValueList->mNext;
+ }
+ break;
+ }
+
+ default:
+ MOZ_ASSERT(false, "unrecognized content unit");
+ }
+
+ // counter-increment: [string [int]]+, none, inherit
+ const nsCSSValue* counterIncrementValue =
+ aRuleData->ValueForCounterIncrement();
+ switch (counterIncrementValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_None:
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ content->AllocateCounterIncrements(0);
+ break;
+
+ case eCSSUnit_Inherit:
+ conditions.SetUncacheable();
+ count = parentContent->CounterIncrementCount();
+ content->AllocateCounterIncrements(count);
+ while (count--) {
+ const nsStyleCounterData& data = parentContent->CounterIncrementAt(count);
+ content->SetCounterIncrementAt(count, data.mCounter, data.mValue);
+ }
+ break;
+
+ case eCSSUnit_PairList:
+ case eCSSUnit_PairListDep: {
+ const nsCSSValuePairList* ourIncrement =
+ counterIncrementValue->GetPairListValue();
+ MOZ_ASSERT(ourIncrement->mXValue.GetUnit() == eCSSUnit_Ident,
+ "unexpected value unit");
+ count = ListLength(ourIncrement);
+ content->AllocateCounterIncrements(count);
+
+ count = 0;
+ for (const nsCSSValuePairList* p = ourIncrement; p; p = p->mNext, count++) {
+ int32_t increment;
+ if (p->mYValue.GetUnit() == eCSSUnit_Integer) {
+ increment = p->mYValue.GetIntValue();
+ } else {
+ increment = 1;
+ }
+ p->mXValue.GetStringValue(buffer);
+ content->SetCounterIncrementAt(count, buffer, increment);
+ }
+ break;
+ }
+
+ default:
+ MOZ_ASSERT(false, "unexpected value unit");
+ }
+
+ // counter-reset: [string [int]]+, none, inherit
+ const nsCSSValue* counterResetValue = aRuleData->ValueForCounterReset();
+ switch (counterResetValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_None:
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ content->AllocateCounterResets(0);
+ break;
+
+ case eCSSUnit_Inherit:
+ conditions.SetUncacheable();
+ count = parentContent->CounterResetCount();
+ content->AllocateCounterResets(count);
+ while (0 < count--) {
+ const nsStyleCounterData& data = parentContent->CounterResetAt(count);
+ content->SetCounterResetAt(count, data.mCounter, data.mValue);
+ }
+ break;
+
+ case eCSSUnit_PairList:
+ case eCSSUnit_PairListDep: {
+ const nsCSSValuePairList* ourReset =
+ counterResetValue->GetPairListValue();
+ MOZ_ASSERT(ourReset->mXValue.GetUnit() == eCSSUnit_Ident,
+ "unexpected value unit");
+ count = ListLength(ourReset);
+ content->AllocateCounterResets(count);
+ count = 0;
+ for (const nsCSSValuePairList* p = ourReset; p; p = p->mNext, count++) {
+ int32_t reset;
+ if (p->mYValue.GetUnit() == eCSSUnit_Integer) {
+ reset = p->mYValue.GetIntValue();
+ } else {
+ reset = 0;
+ }
+ p->mXValue.GetStringValue(buffer);
+ content->SetCounterResetAt(count, buffer, reset);
+ }
+ break;
+ }
+
+ default:
+ MOZ_ASSERT(false, "unexpected value unit");
+ }
+
+ // If we ended up with an image, track it.
+ for (uint32_t i = 0; i < content->ContentCount(); ++i) {
+ if ((content->ContentAt(i).mType == eStyleContentType_Image) &&
+ content->ContentAt(i).mContent.mImage) {
+ content->ContentAt(i).TrackImage(
+ aContext->PresContext()->Document()->ImageTracker());
+ }
+ }
+
+ COMPUTE_END_RESET(Content, content)
+}
+
+const void*
+nsRuleNode::ComputeXULData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(XUL, xul, parentXUL)
+
+ // box-align: enum, inherit, initial
+ SetValue(*aRuleData->ValueForBoxAlign(),
+ xul->mBoxAlign, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentXUL->mBoxAlign,
+ StyleBoxAlign::Stretch);
+
+ // box-direction: enum, inherit, initial
+ SetValue(*aRuleData->ValueForBoxDirection(),
+ xul->mBoxDirection, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentXUL->mBoxDirection,
+ StyleBoxDirection::Normal);
+
+ // box-flex: factor, inherit
+ SetFactor(*aRuleData->ValueForBoxFlex(),
+ xul->mBoxFlex, conditions,
+ parentXUL->mBoxFlex, 0.0f,
+ SETFCT_UNSET_INITIAL);
+
+ // box-orient: enum, inherit, initial
+ SetValue(*aRuleData->ValueForBoxOrient(),
+ xul->mBoxOrient, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentXUL->mBoxOrient,
+ StyleBoxOrient::Horizontal);
+
+ // box-pack: enum, inherit, initial
+ SetValue(*aRuleData->ValueForBoxPack(),
+ xul->mBoxPack, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentXUL->mBoxPack,
+ StyleBoxPack::Start);
+
+ // box-ordinal-group: integer, inherit, initial
+ SetValue(*aRuleData->ValueForBoxOrdinalGroup(),
+ xul->mBoxOrdinal, conditions,
+ SETVAL_INTEGER | SETVAL_UNSET_INITIAL,
+ parentXUL->mBoxOrdinal, 1);
+
+ const nsCSSValue* stackSizingValue = aRuleData->ValueForStackSizing();
+ if (eCSSUnit_Inherit == stackSizingValue->GetUnit()) {
+ conditions.SetUncacheable();
+ xul->mStretchStack = parentXUL->mStretchStack;
+ } else if (eCSSUnit_Initial == stackSizingValue->GetUnit() ||
+ eCSSUnit_Unset == stackSizingValue->GetUnit()) {
+ xul->mStretchStack = true;
+ } else if (eCSSUnit_Enumerated == stackSizingValue->GetUnit()) {
+ xul->mStretchStack = stackSizingValue->GetIntValue() ==
+ NS_STYLE_STACK_SIZING_STRETCH_TO_FIT;
+ }
+
+ COMPUTE_END_RESET(XUL, xul)
+}
+
+const void*
+nsRuleNode::ComputeColumnData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(Column, column, parent)
+
+ // column-width: length, auto, inherit
+ SetCoord(*aRuleData->ValueForColumnWidth(),
+ column->mColumnWidth, parent->mColumnWidth,
+ SETCOORD_LAH | SETCOORD_INITIAL_AUTO |
+ SETCOORD_CALC_LENGTH_ONLY | SETCOORD_CALC_CLAMP_NONNEGATIVE |
+ SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+
+ // column-gap: length, inherit, normal
+ SetCoord(*aRuleData->ValueForColumnGap(),
+ column->mColumnGap, parent->mColumnGap,
+ SETCOORD_LH | SETCOORD_NORMAL | SETCOORD_INITIAL_NORMAL |
+ SETCOORD_CALC_LENGTH_ONLY | SETCOORD_UNSET_INITIAL,
+ aContext, mPresContext, conditions);
+ // clamp negative calc() to 0
+ if (column->mColumnGap.GetUnit() == eStyleUnit_Coord) {
+ column->mColumnGap.SetCoordValue(
+ std::max(column->mColumnGap.GetCoordValue(), 0));
+ }
+
+ // column-count: auto, integer, inherit
+ const nsCSSValue* columnCountValue = aRuleData->ValueForColumnCount();
+ if (eCSSUnit_Auto == columnCountValue->GetUnit() ||
+ eCSSUnit_Initial == columnCountValue->GetUnit() ||
+ eCSSUnit_Unset == columnCountValue->GetUnit()) {
+ column->mColumnCount = NS_STYLE_COLUMN_COUNT_AUTO;
+ } else if (eCSSUnit_Integer == columnCountValue->GetUnit()) {
+ column->mColumnCount = columnCountValue->GetIntValue();
+ // Max kMaxColumnCount columns - wallpaper for bug 345583.
+ column->mColumnCount = std::min(column->mColumnCount,
+ nsStyleColumn::kMaxColumnCount);
+ } else if (eCSSUnit_Inherit == columnCountValue->GetUnit()) {
+ conditions.SetUncacheable();
+ column->mColumnCount = parent->mColumnCount;
+ }
+
+ // column-rule-width: length, enum, inherit
+ const nsCSSValue& widthValue = *aRuleData->ValueForColumnRuleWidth();
+ if (eCSSUnit_Initial == widthValue.GetUnit() ||
+ eCSSUnit_Unset == widthValue.GetUnit()) {
+ column->SetColumnRuleWidth(
+ (mPresContext->GetBorderWidthTable())[NS_STYLE_BORDER_WIDTH_MEDIUM]);
+ }
+ else if (eCSSUnit_Enumerated == widthValue.GetUnit()) {
+ NS_ASSERTION(widthValue.GetIntValue() == NS_STYLE_BORDER_WIDTH_THIN ||
+ widthValue.GetIntValue() == NS_STYLE_BORDER_WIDTH_MEDIUM ||
+ widthValue.GetIntValue() == NS_STYLE_BORDER_WIDTH_THICK,
+ "Unexpected enum value");
+ column->SetColumnRuleWidth(
+ (mPresContext->GetBorderWidthTable())[widthValue.GetIntValue()]);
+ }
+ else if (eCSSUnit_Inherit == widthValue.GetUnit()) {
+ column->SetColumnRuleWidth(parent->GetComputedColumnRuleWidth());
+ conditions.SetUncacheable();
+ }
+ else if (widthValue.IsLengthUnit() || widthValue.IsCalcUnit()) {
+ nscoord len =
+ CalcLength(widthValue, aContext, mPresContext, conditions);
+ if (len < 0) {
+ // FIXME: This is untested (by test_value_storage.html) for
+ // column-rule-width since it gets covered up by the border
+ // rounding code.
+ NS_ASSERTION(widthValue.IsCalcUnit(),
+ "parser should have rejected negative length");
+ len = 0;
+ }
+ column->SetColumnRuleWidth(len);
+ }
+
+ // column-rule-style: enum, inherit
+ const nsCSSValue& styleValue = *aRuleData->ValueForColumnRuleStyle();
+ MOZ_ASSERT(eCSSUnit_None != styleValue.GetUnit(),
+ "'none' should be handled as enumerated value");
+ if (eCSSUnit_Enumerated == styleValue.GetUnit()) {
+ column->mColumnRuleStyle = styleValue.GetIntValue();
+ }
+ else if (eCSSUnit_Initial == styleValue.GetUnit() ||
+ eCSSUnit_Unset == styleValue.GetUnit()) {
+ column->mColumnRuleStyle = NS_STYLE_BORDER_STYLE_NONE;
+ }
+ else if (eCSSUnit_Inherit == styleValue.GetUnit()) {
+ conditions.SetUncacheable();
+ column->mColumnRuleStyle = parent->mColumnRuleStyle;
+ }
+
+ // column-rule-color: color, inherit
+ SetComplexColor<eUnsetInitial>(*aRuleData->ValueForColumnRuleColor(),
+ parent->mColumnRuleColor,
+ StyleComplexColor::CurrentColor(),
+ mPresContext,
+ column->mColumnRuleColor, conditions);
+
+ // column-fill: enum
+ SetValue(*aRuleData->ValueForColumnFill(),
+ column->mColumnFill, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parent->mColumnFill,
+ NS_STYLE_COLUMN_FILL_BALANCE);
+
+ COMPUTE_END_RESET(Column, column)
+}
+
+static void
+SetSVGPaint(const nsCSSValue& aValue, const nsStyleSVGPaint& parentPaint,
+ nsPresContext* aPresContext, nsStyleContext *aContext,
+ nsStyleSVGPaint& aResult, nsStyleSVGPaintType aInitialPaintType,
+ RuleNodeCacheConditions& aConditions)
+{
+ MOZ_ASSERT(aInitialPaintType == eStyleSVGPaintType_None ||
+ aInitialPaintType == eStyleSVGPaintType_Color,
+ "SetSVGPaint only supports initial values being either 'black' "
+ "(represented by eStyleSVGPaintType_Color) or none (by "
+ "eStyleSVGPaintType_None)");
+
+ nscolor color;
+
+ if (aValue.GetUnit() == eCSSUnit_Inherit ||
+ aValue.GetUnit() == eCSSUnit_Unset) {
+ aResult = parentPaint;
+ aConditions.SetUncacheable();
+ } else if (aValue.GetUnit() == eCSSUnit_None) {
+ aResult.SetNone();
+ } else if (aValue.GetUnit() == eCSSUnit_Initial) {
+ if (aInitialPaintType == eStyleSVGPaintType_None) {
+ aResult.SetNone();
+ } else {
+ aResult.SetColor(NS_RGB(0, 0, 0));
+ }
+ } else if (SetColor(aValue, NS_RGB(0, 0, 0), aPresContext, aContext,
+ color, aConditions)) {
+ aResult.SetColor(color);
+ } else if (aValue.GetUnit() == eCSSUnit_Pair) {
+ const nsCSSValuePair& pair = aValue.GetPairValue();
+
+ nscolor fallback;
+ if (pair.mYValue.GetUnit() == eCSSUnit_None) {
+ fallback = NS_RGBA(0, 0, 0, 0);
+ } else {
+ MOZ_ASSERT(pair.mYValue.GetUnit() != eCSSUnit_Inherit,
+ "cannot inherit fallback colour");
+ SetColor(pair.mYValue, NS_RGB(0, 0, 0), aPresContext, aContext,
+ fallback, aConditions);
+ }
+
+ if (pair.mXValue.GetUnit() == eCSSUnit_URL) {
+ aResult.SetPaintServer(pair.mXValue.GetURLStructValue(), fallback);
+ } else if (pair.mXValue.GetUnit() == eCSSUnit_Enumerated) {
+
+ switch (pair.mXValue.GetIntValue()) {
+ case NS_COLOR_CONTEXT_FILL:
+ aResult.SetContextValue(eStyleSVGPaintType_ContextFill, fallback);
+ break;
+ case NS_COLOR_CONTEXT_STROKE:
+ aResult.SetContextValue(eStyleSVGPaintType_ContextStroke, fallback);
+ break;
+ default:
+ NS_NOTREACHED("unknown keyword as paint server value");
+ }
+
+ } else {
+ NS_NOTREACHED("malformed paint server value");
+ }
+
+ } else {
+ MOZ_ASSERT(aValue.GetUnit() == eCSSUnit_Null,
+ "malformed paint server value");
+ }
+}
+
+static void
+SetSVGOpacity(const nsCSSValue& aValue,
+ float& aOpacityField, nsStyleSVGOpacitySource& aOpacityTypeField,
+ RuleNodeCacheConditions& aConditions,
+ float aParentOpacity, nsStyleSVGOpacitySource aParentOpacityType)
+{
+ if (eCSSUnit_Enumerated == aValue.GetUnit()) {
+ switch (aValue.GetIntValue()) {
+ case NS_STYLE_CONTEXT_FILL_OPACITY:
+ aOpacityTypeField = eStyleSVGOpacitySource_ContextFillOpacity;
+ break;
+ case NS_STYLE_CONTEXT_STROKE_OPACITY:
+ aOpacityTypeField = eStyleSVGOpacitySource_ContextStrokeOpacity;
+ break;
+ default:
+ NS_NOTREACHED("SetSVGOpacity: Unknown keyword");
+ }
+ // Fall back on fully opaque
+ aOpacityField = 1.0f;
+ } else if (eCSSUnit_Inherit == aValue.GetUnit() ||
+ eCSSUnit_Unset == aValue.GetUnit()) {
+ aConditions.SetUncacheable();
+ aOpacityField = aParentOpacity;
+ aOpacityTypeField = aParentOpacityType;
+ } else if (eCSSUnit_Null != aValue.GetUnit()) {
+ SetFactor(aValue, aOpacityField, aConditions,
+ aParentOpacity, 1.0f, SETFCT_OPACITY);
+ aOpacityTypeField = eStyleSVGOpacitySource_Normal;
+ }
+}
+
+/* static */
+void
+nsRuleNode::FillAllMaskLists(nsStyleImageLayers& aMask,
+ uint32_t aMaxItemCount)
+{
+
+ // Delete any extra items. We need to keep layers in which any
+ // property was specified.
+ aMask.mLayers.TruncateLengthNonZero(aMaxItemCount);
+
+ uint32_t fillCount = aMask.mImageCount;
+
+ FillImageLayerList(aMask.mLayers,
+ &nsStyleImageLayers::Layer::mImage,
+ aMask.mImageCount, fillCount);
+ FillImageLayerList(aMask.mLayers,
+ &nsStyleImageLayers::Layer::mSourceURI,
+ aMask.mImageCount, fillCount);
+ FillImageLayerList(aMask.mLayers,
+ &nsStyleImageLayers::Layer::mRepeat,
+ aMask.mRepeatCount, fillCount);
+ FillImageLayerList(aMask.mLayers,
+ &nsStyleImageLayers::Layer::mClip,
+ aMask.mClipCount, fillCount);
+ FillImageLayerList(aMask.mLayers,
+ &nsStyleImageLayers::Layer::mOrigin,
+ aMask.mOriginCount, fillCount);
+ FillImageLayerPositionCoordList(aMask.mLayers,
+ &Position::mXPosition,
+ aMask.mPositionXCount, fillCount);
+ FillImageLayerPositionCoordList(aMask.mLayers,
+ &Position::mYPosition,
+ aMask.mPositionYCount, fillCount);
+ FillImageLayerList(aMask.mLayers,
+ &nsStyleImageLayers::Layer::mSize,
+ aMask.mSizeCount, fillCount);
+ FillImageLayerList(aMask.mLayers,
+ &nsStyleImageLayers::Layer::mMaskMode,
+ aMask.mMaskModeCount, fillCount);
+ FillImageLayerList(aMask.mLayers,
+ &nsStyleImageLayers::Layer::mComposite,
+ aMask.mCompositeCount, fillCount);
+}
+
+const void*
+nsRuleNode::ComputeSVGData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_INHERITED(SVG, svg, parentSVG)
+
+ // clip-rule: enum, inherit, initial
+ SetValue(*aRuleData->ValueForClipRule(),
+ svg->mClipRule, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentSVG->mClipRule,
+ StyleFillRule::Nonzero);
+
+ // color-interpolation: enum, inherit, initial
+ SetValue(*aRuleData->ValueForColorInterpolation(),
+ svg->mColorInterpolation, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentSVG->mColorInterpolation,
+ NS_STYLE_COLOR_INTERPOLATION_SRGB);
+
+ // color-interpolation-filters: enum, inherit, initial
+ SetValue(*aRuleData->ValueForColorInterpolationFilters(),
+ svg->mColorInterpolationFilters, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentSVG->mColorInterpolationFilters,
+ NS_STYLE_COLOR_INTERPOLATION_LINEARRGB);
+
+ // fill:
+ SetSVGPaint(*aRuleData->ValueForFill(),
+ parentSVG->mFill, mPresContext, aContext,
+ svg->mFill, eStyleSVGPaintType_Color, conditions);
+
+ // fill-opacity: factor, inherit, initial,
+ // context-fill-opacity, context-stroke-opacity
+ nsStyleSVGOpacitySource contextFillOpacity = svg->FillOpacitySource();
+ SetSVGOpacity(*aRuleData->ValueForFillOpacity(),
+ svg->mFillOpacity, contextFillOpacity, conditions,
+ parentSVG->mFillOpacity, parentSVG->FillOpacitySource());
+ svg->SetFillOpacitySource(contextFillOpacity);
+
+ // fill-rule: enum, inherit, initial
+ SetValue(*aRuleData->ValueForFillRule(),
+ svg->mFillRule, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentSVG->mFillRule,
+ StyleFillRule::Nonzero);
+
+ // marker-end: url, none, inherit
+ const nsCSSValue* markerEndValue = aRuleData->ValueForMarkerEnd();
+ if (eCSSUnit_URL == markerEndValue->GetUnit()) {
+ svg->mMarkerEnd = markerEndValue->GetURLStructValue();
+ } else if (eCSSUnit_None == markerEndValue->GetUnit() ||
+ eCSSUnit_Initial == markerEndValue->GetUnit()) {
+ svg->mMarkerEnd = nullptr;
+ } else if (eCSSUnit_Inherit == markerEndValue->GetUnit() ||
+ eCSSUnit_Unset == markerEndValue->GetUnit()) {
+ conditions.SetUncacheable();
+ svg->mMarkerEnd = parentSVG->mMarkerEnd;
+ }
+
+ // marker-mid: url, none, inherit
+ const nsCSSValue* markerMidValue = aRuleData->ValueForMarkerMid();
+ if (eCSSUnit_URL == markerMidValue->GetUnit()) {
+ svg->mMarkerMid = markerMidValue->GetURLStructValue();
+ } else if (eCSSUnit_None == markerMidValue->GetUnit() ||
+ eCSSUnit_Initial == markerMidValue->GetUnit()) {
+ svg->mMarkerMid = nullptr;
+ } else if (eCSSUnit_Inherit == markerMidValue->GetUnit() ||
+ eCSSUnit_Unset == markerMidValue->GetUnit()) {
+ conditions.SetUncacheable();
+ svg->mMarkerMid = parentSVG->mMarkerMid;
+ }
+
+ // marker-start: url, none, inherit
+ const nsCSSValue* markerStartValue = aRuleData->ValueForMarkerStart();
+ if (eCSSUnit_URL == markerStartValue->GetUnit()) {
+ svg->mMarkerStart = markerStartValue->GetURLStructValue();
+ } else if (eCSSUnit_None == markerStartValue->GetUnit() ||
+ eCSSUnit_Initial == markerStartValue->GetUnit()) {
+ svg->mMarkerStart = nullptr;
+ } else if (eCSSUnit_Inherit == markerStartValue->GetUnit() ||
+ eCSSUnit_Unset == markerStartValue->GetUnit()) {
+ conditions.SetUncacheable();
+ svg->mMarkerStart = parentSVG->mMarkerStart;
+ }
+
+ // paint-order: enum (bit field), inherit, initial
+ const nsCSSValue* paintOrderValue = aRuleData->ValueForPaintOrder();
+ switch (paintOrderValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Enumerated:
+ static_assert
+ (NS_STYLE_PAINT_ORDER_BITWIDTH * NS_STYLE_PAINT_ORDER_LAST_VALUE <= 8,
+ "SVGStyleStruct::mPaintOrder not big enough");
+ svg->mPaintOrder = static_cast<uint8_t>(paintOrderValue->GetIntValue());
+ break;
+
+ case eCSSUnit_Inherit:
+ case eCSSUnit_Unset:
+ conditions.SetUncacheable();
+ svg->mPaintOrder = parentSVG->mPaintOrder;
+ break;
+
+ case eCSSUnit_Initial:
+ svg->mPaintOrder = NS_STYLE_PAINT_ORDER_NORMAL;
+ break;
+
+ default:
+ NS_NOTREACHED("unexpected unit");
+ }
+
+ // shape-rendering: enum, inherit
+ SetValue(*aRuleData->ValueForShapeRendering(),
+ svg->mShapeRendering, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentSVG->mShapeRendering,
+ NS_STYLE_SHAPE_RENDERING_AUTO);
+
+ // stroke:
+ SetSVGPaint(*aRuleData->ValueForStroke(),
+ parentSVG->mStroke, mPresContext, aContext,
+ svg->mStroke, eStyleSVGPaintType_None, conditions);
+
+ // stroke-dasharray: <dasharray>, none, inherit, context-value
+ const nsCSSValue* strokeDasharrayValue = aRuleData->ValueForStrokeDasharray();
+ switch (strokeDasharrayValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Inherit:
+ case eCSSUnit_Unset:
+ conditions.SetUncacheable();
+ svg->SetStrokeDasharrayFromObject(parentSVG->StrokeDasharrayFromObject());
+ svg->mStrokeDasharray = parentSVG->mStrokeDasharray;
+ break;
+
+ case eCSSUnit_Enumerated:
+ MOZ_ASSERT(strokeDasharrayValue->GetIntValue() ==
+ NS_STYLE_STROKE_PROP_CONTEXT_VALUE,
+ "Unknown keyword for stroke-dasharray");
+ svg->SetStrokeDasharrayFromObject(true);
+ svg->mStrokeDasharray.Clear();
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_None:
+ svg->SetStrokeDasharrayFromObject(false);
+ svg->mStrokeDasharray.Clear();
+ break;
+
+ case eCSSUnit_List:
+ case eCSSUnit_ListDep: {
+ svg->SetStrokeDasharrayFromObject(false);
+ svg->mStrokeDasharray.Clear();
+
+ // count number of values
+ const nsCSSValueList *value = strokeDasharrayValue->GetListValue();
+ uint32_t strokeDasharrayLength = ListLength(value);
+
+ MOZ_ASSERT(strokeDasharrayLength != 0, "no dasharray items");
+
+ svg->mStrokeDasharray.SetLength(strokeDasharrayLength);
+
+ uint32_t i = 0;
+ while (nullptr != value) {
+ SetCoord(value->mValue,
+ svg->mStrokeDasharray[i++], nsStyleCoord(),
+ SETCOORD_LP | SETCOORD_FACTOR,
+ aContext, mPresContext, conditions);
+ value = value->mNext;
+ }
+ break;
+ }
+
+ default:
+ MOZ_ASSERT(false, "unrecognized dasharray unit");
+ }
+
+ // stroke-dashoffset: <dashoffset>, inherit
+ const nsCSSValue *strokeDashoffsetValue =
+ aRuleData->ValueForStrokeDashoffset();
+ svg->SetStrokeDashoffsetFromObject(
+ strokeDashoffsetValue->GetUnit() == eCSSUnit_Enumerated &&
+ strokeDashoffsetValue->GetIntValue() == NS_STYLE_STROKE_PROP_CONTEXT_VALUE);
+ if (svg->StrokeDashoffsetFromObject()) {
+ svg->mStrokeDashoffset.SetCoordValue(0);
+ } else {
+ SetCoord(*aRuleData->ValueForStrokeDashoffset(),
+ svg->mStrokeDashoffset, parentSVG->mStrokeDashoffset,
+ SETCOORD_LPH | SETCOORD_FACTOR | SETCOORD_INITIAL_ZERO |
+ SETCOORD_UNSET_INHERIT,
+ aContext, mPresContext, conditions);
+ }
+
+ // stroke-linecap: enum, inherit, initial
+ SetValue(*aRuleData->ValueForStrokeLinecap(),
+ svg->mStrokeLinecap, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentSVG->mStrokeLinecap,
+ NS_STYLE_STROKE_LINECAP_BUTT);
+
+ // stroke-linejoin: enum, inherit, initial
+ SetValue(*aRuleData->ValueForStrokeLinejoin(),
+ svg->mStrokeLinejoin, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentSVG->mStrokeLinejoin,
+ NS_STYLE_STROKE_LINEJOIN_MITER);
+
+ // stroke-miterlimit: <miterlimit>, inherit
+ SetFactor(*aRuleData->ValueForStrokeMiterlimit(),
+ svg->mStrokeMiterlimit,
+ conditions,
+ parentSVG->mStrokeMiterlimit, 4.0f,
+ SETFCT_UNSET_INHERIT);
+
+ // stroke-opacity:
+ nsStyleSVGOpacitySource contextStrokeOpacity = svg->StrokeOpacitySource();
+ SetSVGOpacity(*aRuleData->ValueForStrokeOpacity(),
+ svg->mStrokeOpacity, contextStrokeOpacity, conditions,
+ parentSVG->mStrokeOpacity, parentSVG->StrokeOpacitySource());
+ svg->SetStrokeOpacitySource(contextStrokeOpacity);
+
+ // stroke-width:
+ const nsCSSValue* strokeWidthValue = aRuleData->ValueForStrokeWidth();
+ switch (strokeWidthValue->GetUnit()) {
+ case eCSSUnit_Enumerated:
+ MOZ_ASSERT(strokeWidthValue->GetIntValue() ==
+ NS_STYLE_STROKE_PROP_CONTEXT_VALUE,
+ "Unrecognized keyword for stroke-width");
+ svg->SetStrokeWidthFromObject(true);
+ svg->mStrokeWidth.SetCoordValue(nsPresContext::CSSPixelsToAppUnits(1));
+ break;
+
+ case eCSSUnit_Initial:
+ svg->SetStrokeWidthFromObject(false);
+ svg->mStrokeWidth.SetCoordValue(nsPresContext::CSSPixelsToAppUnits(1));
+ break;
+
+ default:
+ svg->SetStrokeWidthFromObject(false);
+ SetCoord(*strokeWidthValue,
+ svg->mStrokeWidth, parentSVG->mStrokeWidth,
+ SETCOORD_LPH | SETCOORD_FACTOR | SETCOORD_UNSET_INHERIT,
+ aContext, mPresContext, conditions);
+ }
+
+ // text-anchor: enum, inherit, initial
+ SetValue(*aRuleData->ValueForTextAnchor(),
+ svg->mTextAnchor, conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+ parentSVG->mTextAnchor,
+ NS_STYLE_TEXT_ANCHOR_START);
+
+ COMPUTE_END_INHERITED(SVG, svg)
+}
+
+static already_AddRefed<StyleBasicShape>
+GetStyleBasicShapeFromCSSValue(const nsCSSValue& aValue,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+{
+ RefPtr<StyleBasicShape> basicShape;
+
+ nsCSSValue::Array* shapeFunction = aValue.GetArrayValue();
+ nsCSSKeyword functionName =
+ (nsCSSKeyword)shapeFunction->Item(0).GetIntValue();
+
+ if (functionName == eCSSKeyword_polygon) {
+ MOZ_ASSERT(!basicShape, "did not expect value");
+ basicShape = new StyleBasicShape(StyleBasicShapeType::Polygon);
+ MOZ_ASSERT(shapeFunction->Count() > 1,
+ "polygon has wrong number of arguments");
+ size_t j = 1;
+ if (shapeFunction->Item(j).GetUnit() == eCSSUnit_Enumerated) {
+ StyleFillRule rule;
+ SetEnumValueHelper::SetEnumeratedValue(rule, shapeFunction->Item(j));
+ basicShape->SetFillRule(rule);
+ ++j;
+ }
+ const int32_t mask = SETCOORD_PERCENT | SETCOORD_LENGTH |
+ SETCOORD_STORE_CALC;
+ const nsCSSValuePairList* curPair =
+ shapeFunction->Item(j).GetPairListValue();
+ nsTArray<nsStyleCoord>& coordinates = basicShape->Coordinates();
+ while (curPair) {
+ nsStyleCoord xCoord, yCoord;
+ DebugOnly<bool> didSetCoordX = SetCoord(curPair->mXValue, xCoord,
+ nsStyleCoord(), mask,
+ aStyleContext, aPresContext,
+ aConditions);
+ coordinates.AppendElement(xCoord);
+ MOZ_ASSERT(didSetCoordX, "unexpected x coordinate unit");
+ DebugOnly<bool> didSetCoordY = SetCoord(curPair->mYValue, yCoord,
+ nsStyleCoord(), mask,
+ aStyleContext, aPresContext,
+ aConditions);
+ coordinates.AppendElement(yCoord);
+ MOZ_ASSERT(didSetCoordY, "unexpected y coordinate unit");
+ curPair = curPair->mNext;
+ }
+ } else if (functionName == eCSSKeyword_circle ||
+ functionName == eCSSKeyword_ellipse) {
+ StyleBasicShapeType type = functionName == eCSSKeyword_circle ?
+ StyleBasicShapeType::Circle :
+ StyleBasicShapeType::Ellipse;
+ MOZ_ASSERT(!basicShape, "did not expect value");
+ basicShape = new StyleBasicShape(type);
+ const int32_t mask = SETCOORD_PERCENT | SETCOORD_LENGTH |
+ SETCOORD_STORE_CALC | SETCOORD_ENUMERATED;
+ size_t count = type == StyleBasicShapeType::Circle ? 2 : 3;
+ MOZ_ASSERT(shapeFunction->Count() == count + 1,
+ "unexpected arguments count");
+ MOZ_ASSERT(type == StyleBasicShapeType::Circle ||
+ (shapeFunction->Item(1).GetUnit() == eCSSUnit_Null) ==
+ (shapeFunction->Item(2).GetUnit() == eCSSUnit_Null),
+ "ellipse should have two radii or none");
+ for (size_t j = 1; j < count; ++j) {
+ const nsCSSValue& val = shapeFunction->Item(j);
+ nsStyleCoord radius;
+ if (val.GetUnit() != eCSSUnit_Null) {
+ DebugOnly<bool> didSetRadius = SetCoord(val, radius,
+ nsStyleCoord(), mask,
+ aStyleContext,
+ aPresContext,
+ aConditions);
+ MOZ_ASSERT(didSetRadius, "unexpected radius unit");
+ } else {
+ radius.SetIntValue(NS_RADIUS_CLOSEST_SIDE, eStyleUnit_Enumerated);
+ }
+ basicShape->Coordinates().AppendElement(radius);
+ }
+ const nsCSSValue& positionVal = shapeFunction->Item(count);
+ if (positionVal.GetUnit() == eCSSUnit_Array) {
+ ComputePositionValue(aStyleContext, positionVal,
+ basicShape->GetPosition(),
+ aConditions);
+ } else {
+ MOZ_ASSERT(positionVal.GetUnit() == eCSSUnit_Null,
+ "expected no value");
+ }
+ } else if (functionName == eCSSKeyword_inset) {
+ MOZ_ASSERT(!basicShape, "did not expect value");
+ basicShape = new StyleBasicShape(StyleBasicShapeType::Inset);
+ MOZ_ASSERT(shapeFunction->Count() == 6,
+ "inset function has wrong number of arguments");
+ MOZ_ASSERT(shapeFunction->Item(1).GetUnit() != eCSSUnit_Null,
+ "no shape arguments defined");
+ const int32_t mask = SETCOORD_PERCENT | SETCOORD_LENGTH |
+ SETCOORD_STORE_CALC;
+ nsTArray<nsStyleCoord>& coords = basicShape->Coordinates();
+ for (size_t j = 1; j <= 4; ++j) {
+ const nsCSSValue& val = shapeFunction->Item(j);
+ nsStyleCoord inset;
+ // Fill missing values to get 4 at the end.
+ if (val.GetUnit() == eCSSUnit_Null) {
+ if (j == 4) {
+ inset = coords[1];
+ } else {
+ MOZ_ASSERT(j != 1, "first argument not specified");
+ inset = coords[0];
+ }
+ } else {
+ DebugOnly<bool> didSetInset = SetCoord(val, inset,
+ nsStyleCoord(), mask,
+ aStyleContext, aPresContext,
+ aConditions);
+ MOZ_ASSERT(didSetInset, "unexpected inset unit");
+ }
+ coords.AppendElement(inset);
+ }
+
+ nsStyleCorners& insetRadius = basicShape->GetRadius();
+ if (shapeFunction->Item(5).GetUnit() == eCSSUnit_Array) {
+ nsCSSValue::Array* radiiArray = shapeFunction->Item(5).GetArrayValue();
+ NS_FOR_CSS_FULL_CORNERS(corner) {
+ int cx = NS_FULL_TO_HALF_CORNER(corner, false);
+ int cy = NS_FULL_TO_HALF_CORNER(corner, true);
+ const nsCSSValue& radius = radiiArray->Item(corner);
+ nsStyleCoord coordX, coordY;
+ DebugOnly<bool> didSetRadii = SetPairCoords(radius, coordX, coordY,
+ nsStyleCoord(),
+ nsStyleCoord(), mask,
+ aStyleContext,
+ aPresContext,
+ aConditions);
+ MOZ_ASSERT(didSetRadii, "unexpected radius unit");
+ insetRadius.Set(cx, coordX);
+ insetRadius.Set(cy, coordY);
+ }
+ } else {
+ MOZ_ASSERT(shapeFunction->Item(5).GetUnit() == eCSSUnit_Null,
+ "unexpected value");
+ // Initialize border-radius
+ nsStyleCoord zero;
+ zero.SetCoordValue(0);
+ NS_FOR_CSS_HALF_CORNERS(j) {
+ insetRadius.Set(j, zero);
+ }
+ }
+ } else {
+ NS_NOTREACHED("unexpected basic shape function");
+ }
+
+ return basicShape.forget();
+}
+
+template<typename ReferenceBox>
+static void
+SetStyleShapeSourceToCSSValue(
+ StyleShapeSource<ReferenceBox>* aShapeSource,
+ const nsCSSValue* aValue,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+{
+ MOZ_ASSERT(aValue->GetUnit() == eCSSUnit_Array,
+ "expected a basic shape or reference box");
+
+ const nsCSSValue::Array* array = aValue->GetArrayValue();
+ MOZ_ASSERT(array->Count() == 1 || array->Count() == 2,
+ "Expect one or both of a shape function and a reference box");
+
+ ReferenceBox referenceBox = ReferenceBox::NoBox;
+ RefPtr<StyleBasicShape> basicShape;
+
+ for (size_t i = 0; i < array->Count(); ++i) {
+ const nsCSSValue& item = array->Item(i);
+ if (item.GetUnit() == eCSSUnit_Enumerated) {
+ referenceBox = static_cast<ReferenceBox>(item.GetIntValue());
+ } else if (item.GetUnit() == eCSSUnit_Function) {
+ basicShape = GetStyleBasicShapeFromCSSValue(item, aStyleContext,
+ aPresContext, aConditions);
+ } else {
+ MOZ_ASSERT_UNREACHABLE("Unexpected unit!");
+ return;
+ }
+ }
+
+ if (basicShape) {
+ aShapeSource->SetBasicShape(basicShape, referenceBox);
+ } else {
+ aShapeSource->SetReferenceBox(referenceBox);
+ }
+}
+
+// Returns true if the nsStyleFilter was successfully set using the nsCSSValue.
+static bool
+SetStyleFilterToCSSValue(nsStyleFilter* aStyleFilter,
+ const nsCSSValue& aValue,
+ nsStyleContext* aStyleContext,
+ nsPresContext* aPresContext,
+ RuleNodeCacheConditions& aConditions)
+{
+ nsCSSUnit unit = aValue.GetUnit();
+ if (unit == eCSSUnit_URL) {
+ return aStyleFilter->SetURL(aValue.GetURLStructValue());
+ }
+
+ MOZ_ASSERT(unit == eCSSUnit_Function, "expected a filter function");
+
+ nsCSSValue::Array* filterFunction = aValue.GetArrayValue();
+ nsCSSKeyword functionName =
+ (nsCSSKeyword)filterFunction->Item(0).GetIntValue();
+
+ int32_t type;
+ DebugOnly<bool> foundKeyword =
+ nsCSSProps::FindKeyword(functionName,
+ nsCSSProps::kFilterFunctionKTable,
+ type);
+ MOZ_ASSERT(foundKeyword, "unknown filter type");
+ if (type == NS_STYLE_FILTER_DROP_SHADOW) {
+ RefPtr<nsCSSShadowArray> shadowArray = GetShadowData(
+ filterFunction->Item(1).GetListValue(),
+ aStyleContext,
+ false,
+ aPresContext,
+ aConditions);
+ aStyleFilter->SetDropShadow(shadowArray);
+ return true;
+ }
+
+ int32_t mask = SETCOORD_PERCENT | SETCOORD_FACTOR;
+ if (type == NS_STYLE_FILTER_BLUR) {
+ mask = SETCOORD_LENGTH |
+ SETCOORD_CALC_LENGTH_ONLY |
+ SETCOORD_CALC_CLAMP_NONNEGATIVE;
+ } else if (type == NS_STYLE_FILTER_HUE_ROTATE) {
+ mask = SETCOORD_ANGLE;
+ }
+
+ MOZ_ASSERT(filterFunction->Count() == 2,
+ "all filter functions should have exactly one argument");
+
+ nsCSSValue& arg = filterFunction->Item(1);
+ nsStyleCoord filterParameter;
+ DebugOnly<bool> didSetCoord = SetCoord(arg, filterParameter,
+ nsStyleCoord(), mask,
+ aStyleContext, aPresContext,
+ aConditions);
+ aStyleFilter->SetFilterParameter(filterParameter, type);
+ MOZ_ASSERT(didSetCoord, "unexpected unit");
+ return true;
+}
+
+const void*
+nsRuleNode::ComputeSVGResetData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(SVGReset, svgReset, parentSVGReset)
+
+ // stop-color:
+ const nsCSSValue* stopColorValue = aRuleData->ValueForStopColor();
+ if (eCSSUnit_Initial == stopColorValue->GetUnit() ||
+ eCSSUnit_Unset == stopColorValue->GetUnit()) {
+ svgReset->mStopColor = NS_RGB(0, 0, 0);
+ } else {
+ SetColor(*stopColorValue, parentSVGReset->mStopColor,
+ mPresContext, aContext, svgReset->mStopColor, conditions);
+ }
+
+ // flood-color:
+ const nsCSSValue* floodColorValue = aRuleData->ValueForFloodColor();
+ if (eCSSUnit_Initial == floodColorValue->GetUnit() ||
+ eCSSUnit_Unset == floodColorValue->GetUnit()) {
+ svgReset->mFloodColor = NS_RGB(0, 0, 0);
+ } else {
+ SetColor(*floodColorValue, parentSVGReset->mFloodColor,
+ mPresContext, aContext, svgReset->mFloodColor, conditions);
+ }
+
+ // lighting-color:
+ const nsCSSValue* lightingColorValue = aRuleData->ValueForLightingColor();
+ if (eCSSUnit_Initial == lightingColorValue->GetUnit() ||
+ eCSSUnit_Unset == lightingColorValue->GetUnit()) {
+ svgReset->mLightingColor = NS_RGB(255, 255, 255);
+ } else {
+ SetColor(*lightingColorValue, parentSVGReset->mLightingColor,
+ mPresContext, aContext, svgReset->mLightingColor,
+ conditions);
+ }
+
+ // clip-path: url, <basic-shape> || <geometry-box>, none, inherit
+ const nsCSSValue* clipPathValue = aRuleData->ValueForClipPath();
+ switch (clipPathValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_None:
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ svgReset->mClipPath = StyleClipPath();
+ break;
+ case eCSSUnit_Inherit:
+ conditions.SetUncacheable();
+ svgReset->mClipPath = parentSVGReset->mClipPath;
+ break;
+ case eCSSUnit_URL: {
+ svgReset->mClipPath = StyleClipPath();
+ svgReset->mClipPath.SetURL(clipPathValue->GetURLStructValue());
+ break;
+ }
+ case eCSSUnit_Array: {
+ svgReset->mClipPath = StyleClipPath();
+ SetStyleShapeSourceToCSSValue(&svgReset->mClipPath, clipPathValue, aContext,
+ mPresContext, conditions);
+ break;
+ }
+ default:
+ NS_NOTREACHED("unexpected unit");
+ }
+
+ // stop-opacity:
+ SetFactor(*aRuleData->ValueForStopOpacity(),
+ svgReset->mStopOpacity, conditions,
+ parentSVGReset->mStopOpacity, 1.0f,
+ SETFCT_OPACITY | SETFCT_UNSET_INITIAL);
+
+ // flood-opacity:
+ SetFactor(*aRuleData->ValueForFloodOpacity(),
+ svgReset->mFloodOpacity, conditions,
+ parentSVGReset->mFloodOpacity, 1.0f,
+ SETFCT_OPACITY | SETFCT_UNSET_INITIAL);
+
+ // dominant-baseline: enum, inherit, initial
+ SetValue(*aRuleData->ValueForDominantBaseline(),
+ svgReset->mDominantBaseline,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentSVGReset->mDominantBaseline,
+ NS_STYLE_DOMINANT_BASELINE_AUTO);
+
+ // vector-effect: enum, inherit, initial
+ SetValue(*aRuleData->ValueForVectorEffect(),
+ svgReset->mVectorEffect,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentSVGReset->mVectorEffect,
+ NS_STYLE_VECTOR_EFFECT_NONE);
+
+ // mask-type: enum, inherit, initial
+ SetValue(*aRuleData->ValueForMaskType(),
+ svgReset->mMaskType,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentSVGReset->mMaskType,
+ NS_STYLE_MASK_TYPE_LUMINANCE);
+
+#ifdef MOZ_ENABLE_MASK_AS_SHORTHAND
+ uint32_t maxItemCount = 1;
+ bool rebuild = false;
+
+ // mask-image: none | <url> | <image-list> | <element-reference> | <gradient>
+ nsStyleImage initialImage;
+ SetImageLayerList(aContext, *aRuleData->ValueForMaskImage(),
+ svgReset->mMask.mLayers,
+ parentSVGReset->mMask.mLayers,
+ &nsStyleImageLayers::Layer::mImage,
+ initialImage, parentSVGReset->mMask.mImageCount,
+ svgReset->mMask.mImageCount,
+ maxItemCount, rebuild, conditions);
+ SetImageLayerList(aContext, *aRuleData->ValueForMaskImage(),
+ svgReset->mMask.mLayers,
+ parentSVGReset->mMask.mLayers,
+ &nsStyleImageLayers::Layer::mSourceURI,
+ RefPtr<css::URLValueData>(),
+ parentSVGReset->mMask.mImageCount,
+ svgReset->mMask.mImageCount,
+ maxItemCount, rebuild, conditions);
+
+ // mask-repeat: enum, inherit, initial [pair list]
+ nsStyleImageLayers::Repeat initialRepeat;
+ initialRepeat.SetInitialValues();
+ SetImageLayerPairList(aContext, *aRuleData->ValueForMaskRepeat(),
+ svgReset->mMask.mLayers,
+ parentSVGReset->mMask.mLayers,
+ &nsStyleImageLayers::Layer::mRepeat,
+ initialRepeat, parentSVGReset->mMask.mRepeatCount,
+ svgReset->mMask.mRepeatCount, maxItemCount, rebuild,
+ conditions);
+
+ // mask-clip: enum, inherit, initial [list]
+ SetImageLayerList(aContext, *aRuleData->ValueForMaskClip(),
+ svgReset->mMask.mLayers,
+ parentSVGReset->mMask.mLayers,
+ &nsStyleImageLayers::Layer::mClip,
+ uint8_t(NS_STYLE_IMAGELAYER_CLIP_BORDER),
+ parentSVGReset->mMask.mClipCount,
+ svgReset->mMask.mClipCount, maxItemCount, rebuild,
+ conditions);
+
+ // mask-origin: enum, inherit, initial [list]
+ SetImageLayerList(aContext, *aRuleData->ValueForMaskOrigin(),
+ svgReset->mMask.mLayers,
+ parentSVGReset->mMask.mLayers,
+ &nsStyleImageLayers::Layer::mOrigin,
+ uint8_t(NS_STYLE_IMAGELAYER_ORIGIN_BORDER),
+ parentSVGReset->mMask.mOriginCount,
+ svgReset->mMask.mOriginCount, maxItemCount, rebuild,
+ conditions);
+
+ // mask-position-x/y: enum, length, percent (flags), inherit [list]
+ Position::Coord initialPositionCoord;
+ initialPositionCoord.mPercent = 0.0f;
+ initialPositionCoord.mLength = 0;
+ initialPositionCoord.mHasPercent = true;
+
+ SetImageLayerPositionCoordList(
+ aContext, *aRuleData->ValueForMaskPositionX(),
+ svgReset->mMask.mLayers,
+ parentSVGReset->mMask.mLayers,
+ &Position::mXPosition,
+ initialPositionCoord, parentSVGReset->mMask.mPositionXCount,
+ svgReset->mMask.mPositionXCount, maxItemCount, rebuild,
+ conditions);
+ SetImageLayerPositionCoordList(
+ aContext, *aRuleData->ValueForMaskPositionY(),
+ svgReset->mMask.mLayers,
+ parentSVGReset->mMask.mLayers,
+ &Position::mYPosition,
+ initialPositionCoord, parentSVGReset->mMask.mPositionYCount,
+ svgReset->mMask.mPositionYCount, maxItemCount, rebuild,
+ conditions);
+
+ // mask-size: enum, length, auto, inherit, initial [pair list]
+ nsStyleImageLayers::Size initialSize;
+ initialSize.SetInitialValues();
+ SetImageLayerPairList(aContext, *aRuleData->ValueForMaskSize(),
+ svgReset->mMask.mLayers,
+ parentSVGReset->mMask.mLayers,
+ &nsStyleImageLayers::Layer::mSize,
+ initialSize, parentSVGReset->mMask.mSizeCount,
+ svgReset->mMask.mSizeCount, maxItemCount, rebuild,
+ conditions);
+
+ // mask-mode: enum, inherit, initial [list]
+ SetImageLayerList(aContext, *aRuleData->ValueForMaskMode(),
+ svgReset->mMask.mLayers,
+ parentSVGReset->mMask.mLayers,
+ &nsStyleImageLayers::Layer::mMaskMode,
+ uint8_t(NS_STYLE_MASK_MODE_MATCH_SOURCE),
+ parentSVGReset->mMask.mMaskModeCount,
+ svgReset->mMask.mMaskModeCount, maxItemCount, rebuild, conditions);
+
+ // mask-composite: enum, inherit, initial [list]
+ SetImageLayerList(aContext, *aRuleData->ValueForMaskComposite(),
+ svgReset->mMask.mLayers,
+ parentSVGReset->mMask.mLayers,
+ &nsStyleImageLayers::Layer::mComposite,
+ uint8_t(NS_STYLE_MASK_COMPOSITE_ADD),
+ parentSVGReset->mMask.mCompositeCount,
+ svgReset->mMask.mCompositeCount, maxItemCount, rebuild, conditions);
+
+ if (rebuild) {
+ FillAllBackgroundLists(svgReset->mMask, maxItemCount);
+ }
+#else
+ // mask: none | <url>
+ const nsCSSValue* maskValue = aRuleData->ValueForMask();
+ if (eCSSUnit_URL == maskValue->GetUnit()) {
+ svgReset->mMask.mLayers[0].mSourceURI = maskValue->GetURLStructValue();
+ } else if (eCSSUnit_None == maskValue->GetUnit() ||
+ eCSSUnit_Initial == maskValue->GetUnit() ||
+ eCSSUnit_Unset == maskValue->GetUnit()) {
+ svgReset->mMask.mLayers[0].mSourceURI = nullptr;
+ } else if (eCSSUnit_Inherit == maskValue->GetUnit()) {
+ conditions.SetUncacheable();
+ svgReset->mMask.mLayers[0].mSourceURI =
+ parentSVGReset->mMask.mLayers[0].mSourceURI;
+ }
+#endif
+
+ COMPUTE_END_RESET(SVGReset, svgReset)
+}
+
+const void*
+nsRuleNode::ComputeVariablesData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_INHERITED(Variables, variables, parentVariables)
+
+ MOZ_ASSERT(aRuleData->mVariables,
+ "shouldn't be in ComputeVariablesData if there were no variable "
+ "declarations specified");
+
+ CSSVariableResolver resolver(&variables->mVariables);
+ resolver.Resolve(&parentVariables->mVariables,
+ aRuleData->mVariables);
+ conditions.SetUncacheable();
+
+ COMPUTE_END_INHERITED(Variables, variables)
+}
+
+const void*
+nsRuleNode::ComputeEffectsData(void* aStartStruct,
+ const nsRuleData* aRuleData,
+ nsStyleContext* aContext,
+ nsRuleNode* aHighestNode,
+ const RuleDetail aRuleDetail,
+ const RuleNodeCacheConditions aConditions)
+{
+ COMPUTE_START_RESET(Effects, effects, parentEffects)
+
+ // filter: url, none, inherit
+ const nsCSSValue* filterValue = aRuleData->ValueForFilter();
+ switch (filterValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+ case eCSSUnit_None:
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ effects->mFilters.Clear();
+ break;
+ case eCSSUnit_Inherit:
+ conditions.SetUncacheable();
+ effects->mFilters = parentEffects->mFilters;
+ break;
+ case eCSSUnit_List:
+ case eCSSUnit_ListDep: {
+ effects->mFilters.Clear();
+ const nsCSSValueList* cur = filterValue->GetListValue();
+ while (cur) {
+ nsStyleFilter styleFilter;
+ if (!SetStyleFilterToCSSValue(&styleFilter, cur->mValue, aContext,
+ mPresContext, conditions)) {
+ effects->mFilters.Clear();
+ break;
+ }
+ MOZ_ASSERT(styleFilter.GetType() != NS_STYLE_FILTER_NONE,
+ "filter should be set");
+ effects->mFilters.AppendElement(styleFilter);
+ cur = cur->mNext;
+ }
+ break;
+ }
+ default:
+ NS_NOTREACHED("unexpected unit");
+ }
+
+ // box-shadow: none, list, inherit, initial
+ const nsCSSValue* boxShadowValue = aRuleData->ValueForBoxShadow();
+ switch (boxShadowValue->GetUnit()) {
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ case eCSSUnit_None:
+ effects->mBoxShadow = nullptr;
+ break;
+
+ case eCSSUnit_Inherit:
+ effects->mBoxShadow = parentEffects->mBoxShadow;
+ conditions.SetUncacheable();
+ break;
+
+ case eCSSUnit_List:
+ case eCSSUnit_ListDep:
+ effects->mBoxShadow = GetShadowData(boxShadowValue->GetListValue(),
+ aContext, true, mPresContext, conditions);
+ break;
+
+ default:
+ MOZ_ASSERT(false, "unrecognized shadow unit");
+ }
+
+ // clip property: length, auto, inherit
+ const nsCSSValue* clipValue = aRuleData->ValueForClip();
+ switch (clipValue->GetUnit()) {
+ case eCSSUnit_Inherit:
+ conditions.SetUncacheable();
+ effects->mClipFlags = parentEffects->mClipFlags;
+ effects->mClip = parentEffects->mClip;
+ break;
+
+ case eCSSUnit_Initial:
+ case eCSSUnit_Unset:
+ case eCSSUnit_Auto:
+ effects->mClipFlags = NS_STYLE_CLIP_AUTO;
+ effects->mClip.SetRect(0,0,0,0);
+ break;
+
+ case eCSSUnit_Null:
+ break;
+
+ case eCSSUnit_Rect: {
+ const nsCSSRect& clipRect = clipValue->GetRectValue();
+
+ effects->mClipFlags = NS_STYLE_CLIP_RECT;
+
+ if (clipRect.mTop.GetUnit() == eCSSUnit_Auto) {
+ effects->mClip.y = 0;
+ effects->mClipFlags |= NS_STYLE_CLIP_TOP_AUTO;
+ }
+ else if (clipRect.mTop.IsLengthUnit()) {
+ effects->mClip.y = CalcLength(clipRect.mTop, aContext,
+ mPresContext, conditions);
+ }
+
+ if (clipRect.mBottom.GetUnit() == eCSSUnit_Auto) {
+ // Setting to NS_MAXSIZE for the 'auto' case ensures that
+ // the clip rect is nonempty. It is important that mClip be
+ // nonempty if the actual clip rect could be nonempty.
+ effects->mClip.height = NS_MAXSIZE;
+ effects->mClipFlags |= NS_STYLE_CLIP_BOTTOM_AUTO;
+ }
+ else if (clipRect.mBottom.IsLengthUnit()) {
+ effects->mClip.height = CalcLength(clipRect.mBottom, aContext,
+ mPresContext, conditions) -
+ effects->mClip.y;
+ }
+
+ if (clipRect.mLeft.GetUnit() == eCSSUnit_Auto) {
+ effects->mClip.x = 0;
+ effects->mClipFlags |= NS_STYLE_CLIP_LEFT_AUTO;
+ }
+ else if (clipRect.mLeft.IsLengthUnit()) {
+ effects->mClip.x = CalcLength(clipRect.mLeft, aContext,
+ mPresContext, conditions);
+ }
+
+ if (clipRect.mRight.GetUnit() == eCSSUnit_Auto) {
+ // Setting to NS_MAXSIZE for the 'auto' case ensures that
+ // the clip rect is nonempty. It is important that mClip be
+ // nonempty if the actual clip rect could be nonempty.
+ effects->mClip.width = NS_MAXSIZE;
+ effects->mClipFlags |= NS_STYLE_CLIP_RIGHT_AUTO;
+ }
+ else if (clipRect.mRight.IsLengthUnit()) {
+ effects->mClip.width = CalcLength(clipRect.mRight, aContext,
+ mPresContext, conditions) -
+ effects->mClip.x;
+ }
+ break;
+ }
+
+ default:
+ MOZ_ASSERT(false, "unrecognized clip unit");
+ }
+
+ // opacity: factor, inherit, initial
+ SetFactor(*aRuleData->ValueForOpacity(), effects->mOpacity, conditions,
+ parentEffects->mOpacity, 1.0f,
+ SETFCT_OPACITY | SETFCT_UNSET_INITIAL);
+
+ // mix-blend-mode: enum, inherit, initial
+ SetValue(*aRuleData->ValueForMixBlendMode(), effects->mMixBlendMode,
+ conditions,
+ SETVAL_ENUMERATED | SETVAL_UNSET_INITIAL,
+ parentEffects->mMixBlendMode, NS_STYLE_BLEND_NORMAL);
+
+ COMPUTE_END_RESET(Effects, effects)
+}
+
+const void*
+nsRuleNode::GetStyleData(nsStyleStructID aSID,
+ nsStyleContext* aContext,
+ bool aComputeData)
+{
+ NS_ASSERTION(IsUsedDirectly(),
+ "if we ever call this on rule nodes that aren't used "
+ "directly, we should adjust handling of mDependentBits "
+ "in some way.");
+ MOZ_ASSERT(!aContext->GetCachedStyleData(aSID),
+ "style context should not have cached data for struct");
+
+ const void *data;
+
+ // Never use cached data for animated style inside a pseudo-element;
+ // see comment on cacheability in AnimValuesStyleRule::MapRuleInfoInto.
+ if (!(HasAnimationData() && ParentHasPseudoElementData(aContext))) {
+ data = mStyleData.GetStyleData(aSID, aContext, aComputeData);
+ if (MOZ_LIKELY(data != nullptr)) {
+ // For inherited structs, mark the struct (which will be set on
+ // the context by our caller) as not being owned by the context.
+ if (!nsCachedStyleData::IsReset(aSID)) {
+ aContext->AddStyleBit(nsCachedStyleData::GetBitForSID(aSID));
+ } else if (HasAnimationData()) {
+ // If we have animation data, the struct should be cached on the style
+ // context so that we can peek the struct.
+ // See comment in AnimValuesStyleRule::MapRuleInfoInto.
+ StoreStyleOnContext(aContext, aSID, const_cast<void*>(data));
+ }
+
+ return data; // We have a fully specified struct. Just return it.
+ }
+ }
+
+ if (MOZ_UNLIKELY(!aComputeData))
+ return nullptr;
+
+ // Nothing is cached. We'll have to delve further and examine our rules.
+ data = WalkRuleTree(aSID, aContext);
+
+ MOZ_ASSERT(data, "should have aborted on out-of-memory");
+ return data;
+}
+
+void
+nsRuleNode::GetDiscretelyAnimatedCSSValue(nsCSSPropertyID aProperty,
+ nsCSSValue* aValue)
+{
+ for (nsRuleNode* node = this; node; node = node->GetParent()) {
+ nsIStyleRule* rule = node->GetRule();
+ if (!rule) {
+ continue;
+ }
+ if (rule->GetDiscretelyAnimatedCSSValue(aProperty, aValue)) {
+ return;
+ }
+ }
+}
+
+/* static */ bool
+nsRuleNode::HasAuthorSpecifiedRules(nsStyleContext* aStyleContext,
+ uint32_t ruleTypeMask,
+ bool aAuthorColorsAllowed)
+{
+#ifdef MOZ_STYLO
+ if (aStyleContext->StyleSource().IsServoComputedValues()) {
+ NS_WARNING("stylo: nsRuleNode::HasAuthorSpecifiedRules not implemented");
+ return true;
+ }
+#endif
+
+ uint32_t inheritBits = 0;
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_BACKGROUND)
+ inheritBits |= NS_STYLE_INHERIT_BIT(Background);
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_BORDER)
+ inheritBits |= NS_STYLE_INHERIT_BIT(Border);
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_PADDING)
+ inheritBits |= NS_STYLE_INHERIT_BIT(Padding);
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_TEXT_SHADOW)
+ inheritBits |= NS_STYLE_INHERIT_BIT(Text);
+
+ // properties in the SIDS, whether or not we care about them
+ size_t nprops = 0,
+ backgroundOffset, borderOffset, paddingOffset, textShadowOffset;
+
+ // We put the reset properties the start of the nsCSSValue array....
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_BACKGROUND) {
+ backgroundOffset = nprops;
+ nprops += nsCSSProps::PropertyCountInStruct(eStyleStruct_Background);
+ }
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_BORDER) {
+ borderOffset = nprops;
+ nprops += nsCSSProps::PropertyCountInStruct(eStyleStruct_Border);
+ }
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_PADDING) {
+ paddingOffset = nprops;
+ nprops += nsCSSProps::PropertyCountInStruct(eStyleStruct_Padding);
+ }
+
+ // ...and the inherited properties at the end of the array.
+ size_t inheritedOffset = nprops;
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_TEXT_SHADOW) {
+ textShadowOffset = nprops;
+ nprops += nsCSSProps::PropertyCountInStruct(eStyleStruct_Text);
+ }
+
+ void* dataStorage = alloca(nprops * sizeof(nsCSSValue));
+ AutoCSSValueArray dataArray(dataStorage, nprops);
+
+ /* We're relying on the use of |aStyleContext| not mutating it! */
+ nsRuleData ruleData(inheritBits, dataArray.get(),
+ aStyleContext->PresContext(), aStyleContext);
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_BACKGROUND) {
+ ruleData.mValueOffsets[eStyleStruct_Background] = backgroundOffset;
+ }
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_BORDER) {
+ ruleData.mValueOffsets[eStyleStruct_Border] = borderOffset;
+ }
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_PADDING) {
+ ruleData.mValueOffsets[eStyleStruct_Padding] = paddingOffset;
+ }
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_TEXT_SHADOW) {
+ ruleData.mValueOffsets[eStyleStruct_Text] = textShadowOffset;
+ }
+
+ static const nsCSSPropertyID backgroundValues[] = {
+ eCSSProperty_background_color,
+ eCSSProperty_background_image,
+ };
+
+ static const nsCSSPropertyID borderValues[] = {
+ eCSSProperty_border_top_color,
+ eCSSProperty_border_top_style,
+ eCSSProperty_border_top_width,
+ eCSSProperty_border_right_color,
+ eCSSProperty_border_right_style,
+ eCSSProperty_border_right_width,
+ eCSSProperty_border_bottom_color,
+ eCSSProperty_border_bottom_style,
+ eCSSProperty_border_bottom_width,
+ eCSSProperty_border_left_color,
+ eCSSProperty_border_left_style,
+ eCSSProperty_border_left_width,
+ eCSSProperty_border_top_left_radius,
+ eCSSProperty_border_top_right_radius,
+ eCSSProperty_border_bottom_right_radius,
+ eCSSProperty_border_bottom_left_radius,
+ };
+
+ static const nsCSSPropertyID paddingValues[] = {
+ eCSSProperty_padding_top,
+ eCSSProperty_padding_right,
+ eCSSProperty_padding_bottom,
+ eCSSProperty_padding_left,
+ };
+
+ static const nsCSSPropertyID textShadowValues[] = {
+ eCSSProperty_text_shadow
+ };
+
+ // Number of properties we care about
+ size_t nValues = 0;
+
+ nsCSSValue* values[MOZ_ARRAY_LENGTH(backgroundValues) +
+ MOZ_ARRAY_LENGTH(borderValues) +
+ MOZ_ARRAY_LENGTH(paddingValues) +
+ MOZ_ARRAY_LENGTH(textShadowValues)];
+
+ nsCSSPropertyID properties[MOZ_ARRAY_LENGTH(backgroundValues) +
+ MOZ_ARRAY_LENGTH(borderValues) +
+ MOZ_ARRAY_LENGTH(paddingValues) +
+ MOZ_ARRAY_LENGTH(textShadowValues)];
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_BACKGROUND) {
+ for (uint32_t i = 0, i_end = ArrayLength(backgroundValues);
+ i < i_end; ++i) {
+ properties[nValues] = backgroundValues[i];
+ values[nValues++] = ruleData.ValueFor(backgroundValues[i]);
+ }
+ }
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_BORDER) {
+ for (uint32_t i = 0, i_end = ArrayLength(borderValues);
+ i < i_end; ++i) {
+ properties[nValues] = borderValues[i];
+ values[nValues++] = ruleData.ValueFor(borderValues[i]);
+ }
+ }
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_PADDING) {
+ for (uint32_t i = 0, i_end = ArrayLength(paddingValues);
+ i < i_end; ++i) {
+ properties[nValues] = paddingValues[i];
+ values[nValues++] = ruleData.ValueFor(paddingValues[i]);
+ }
+ }
+
+ if (ruleTypeMask & NS_AUTHOR_SPECIFIED_TEXT_SHADOW) {
+ for (uint32_t i = 0, i_end = ArrayLength(textShadowValues);
+ i < i_end; ++i) {
+ properties[nValues] = textShadowValues[i];
+ values[nValues++] = ruleData.ValueFor(textShadowValues[i]);
+ }
+ }
+
+ nsStyleContext* styleContext = aStyleContext;
+
+ // We need to be careful not to count styles covered up by user-important or
+ // UA-important declarations. But we do want to catch explicit inherit
+ // styling in those and check our parent style context to see whether we have
+ // user styling for those properties. Note that we don't care here about
+ // inheritance due to lack of a specified value, since all the properties we
+ // care about are reset properties.
+ bool haveExplicitUAInherit;
+ do {
+ haveExplicitUAInherit = false;
+ for (nsRuleNode* ruleNode = styleContext->RuleNode(); ruleNode;
+ ruleNode = ruleNode->GetParent()) {
+ nsIStyleRule *rule = ruleNode->GetRule();
+ if (rule) {
+ ruleData.mLevel = ruleNode->GetLevel();
+ ruleData.mIsImportantRule = ruleNode->IsImportantRule();
+
+ rule->MapRuleInfoInto(&ruleData);
+
+ if (ruleData.mLevel == SheetType::Agent ||
+ ruleData.mLevel == SheetType::User) {
+ // This is a rule whose effect we want to ignore, so if any of
+ // the properties we care about were set, set them to the dummy
+ // value that they'll never otherwise get.
+ for (uint32_t i = 0; i < nValues; ++i) {
+ nsCSSUnit unit = values[i]->GetUnit();
+ if (unit != eCSSUnit_Null &&
+ unit != eCSSUnit_Dummy &&
+ unit != eCSSUnit_DummyInherit) {
+ if (unit == eCSSUnit_Inherit ||
+ (i >= inheritedOffset && unit == eCSSUnit_Unset)) {
+ haveExplicitUAInherit = true;
+ values[i]->SetDummyInheritValue();
+ } else {
+ values[i]->SetDummyValue();
+ }
+ }
+ }
+ } else {
+ // If any of the values we care about was set by the above rule,
+ // we have author style.
+ for (uint32_t i = 0; i < nValues; ++i) {
+ if (values[i]->GetUnit() != eCSSUnit_Null &&
+ values[i]->GetUnit() != eCSSUnit_Dummy && // see above
+ values[i]->GetUnit() != eCSSUnit_DummyInherit) {
+ // If author colors are not allowed, only claim to have
+ // author-specified rules if we're looking at a non-color
+ // property or if we're looking at the background color and it's
+ // set to transparent. Anything else should get set to a dummy
+ // value instead.
+ if (aAuthorColorsAllowed ||
+ !nsCSSProps::PropHasFlags(properties[i],
+ CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED) ||
+ (properties[i] == eCSSProperty_background_color &&
+ !values[i]->IsNonTransparentColor())) {
+ return true;
+ }
+
+ values[i]->SetDummyValue();
+ }
+ }
+ }
+ }
+ }
+
+ if (haveExplicitUAInherit) {
+ // reset all the eCSSUnit_Null values to eCSSUnit_Dummy (since they're
+ // not styled by the author, or by anyone else), and then reset all the
+ // eCSSUnit_DummyInherit values to eCSSUnit_Null (so we will be able to
+ // detect them being styled by the author) and move up to our parent
+ // style context.
+ for (uint32_t i = 0; i < nValues; ++i)
+ if (values[i]->GetUnit() == eCSSUnit_Null)
+ values[i]->SetDummyValue();
+ for (uint32_t i = 0; i < nValues; ++i)
+ if (values[i]->GetUnit() == eCSSUnit_DummyInherit)
+ values[i]->Reset();
+ styleContext = styleContext->GetParent();
+ }
+ } while (haveExplicitUAInherit && styleContext);
+
+ return false;
+}
+
+/* static */ void
+nsRuleNode::ComputePropertiesOverridingAnimation(
+ const nsTArray<nsCSSPropertyID>& aProperties,
+ nsStyleContext* aStyleContext,
+ nsCSSPropertyIDSet& aPropertiesOverridden)
+{
+ /*
+ * Set up an nsRuleData with all the structs needed for all of the
+ * properties in aProperties.
+ */
+ uint32_t structBits = 0;
+ size_t nprops = 0;
+ size_t offsets[nsStyleStructID_Length];
+ for (size_t propIdx = 0, propEnd = aProperties.Length();
+ propIdx < propEnd; ++propIdx) {
+ nsCSSPropertyID prop = aProperties[propIdx];
+ nsStyleStructID sid = nsCSSProps::kSIDTable[prop];
+ uint32_t bit = nsCachedStyleData::GetBitForSID(sid);
+ if (!(structBits & bit)) {
+ structBits |= bit;
+ offsets[sid] = nprops;
+ nprops += nsCSSProps::PropertyCountInStruct(sid);
+ }
+ }
+
+ void* dataStorage = alloca(nprops * sizeof(nsCSSValue));
+ AutoCSSValueArray dataArray(dataStorage, nprops);
+
+ // We're relying on the use of |aStyleContext| not mutating it!
+ nsRuleData ruleData(structBits, dataArray.get(),
+ aStyleContext->PresContext(), aStyleContext);
+ for (nsStyleStructID sid = nsStyleStructID(0);
+ sid < nsStyleStructID_Length; sid = nsStyleStructID(sid + 1)) {
+ if (structBits & nsCachedStyleData::GetBitForSID(sid)) {
+ ruleData.mValueOffsets[sid] = offsets[sid];
+ }
+ }
+
+ /*
+ * Actually walk up the rule tree until we're someplace less
+ * specific than animations.
+ */
+ for (nsRuleNode* ruleNode = aStyleContext->RuleNode(); ruleNode;
+ ruleNode = ruleNode->GetParent()) {
+ nsIStyleRule *rule = ruleNode->GetRule();
+ if (rule) {
+ ruleData.mLevel = ruleNode->GetLevel();
+ ruleData.mIsImportantRule = ruleNode->IsImportantRule();
+
+ // Transitions are the only non-!important level overriding
+ // animations in the cascade ordering. They also don't actually
+ // override animations, since transitions are suppressed when both
+ // are present. And since we might not have called
+ // UpdateCascadeResults (which updates when they are suppressed
+ // due to the presence of animations for the same element and
+ // property) for transitions yet (which will make their
+ // MapRuleInfoInto skip the properties that are currently
+ // animating), we should skip them explicitly.
+ if (ruleData.mLevel == SheetType::Transition) {
+ continue;
+ }
+
+ if (!ruleData.mIsImportantRule) {
+ // We're now equal to or less than the animation level; stop.
+ break;
+ }
+
+ rule->MapRuleInfoInto(&ruleData);
+ }
+ }
+
+ /*
+ * Fill in which properties were overridden.
+ */
+ for (size_t propIdx = 0, propEnd = aProperties.Length();
+ propIdx < propEnd; ++propIdx) {
+ nsCSSPropertyID prop = aProperties[propIdx];
+ if (ruleData.ValueFor(prop)->GetUnit() != eCSSUnit_Null) {
+ aPropertiesOverridden.AddProperty(prop);
+ }
+ }
+}
+
+/* static */
+bool
+nsRuleNode::ComputeColor(const nsCSSValue& aValue, nsPresContext* aPresContext,
+ nsStyleContext* aStyleContext, nscolor& aResult)
+{
+ MOZ_ASSERT(aValue.GetUnit() != eCSSUnit_Inherit,
+ "aValue shouldn't have eCSSUnit_Inherit");
+ MOZ_ASSERT(aValue.GetUnit() != eCSSUnit_Initial,
+ "aValue shouldn't have eCSSUnit_Initial");
+ MOZ_ASSERT(aValue.GetUnit() != eCSSUnit_Unset,
+ "aValue shouldn't have eCSSUnit_Unset");
+
+ RuleNodeCacheConditions conditions;
+ bool ok = SetColor(aValue, NS_RGB(0, 0, 0), aPresContext, aStyleContext,
+ aResult, conditions);
+ MOZ_ASSERT(ok || !(aPresContext && aStyleContext));
+ return ok;
+}
+
+/* static */ bool
+nsRuleNode::ParentHasPseudoElementData(nsStyleContext* aContext)
+{
+ nsStyleContext* parent = aContext->GetParent();
+ return parent && parent->HasPseudoElementData();
+}
+
+/* static */ void
+nsRuleNode::StoreStyleOnContext(nsStyleContext* aContext,
+ nsStyleStructID aSID,
+ void* aStruct)
+{
+ aContext->AddStyleBit(nsCachedStyleData::GetBitForSID(aSID));
+ aContext->SetStyle(aSID, aStruct);
+}
+
+#ifdef DEBUG
+bool
+nsRuleNode::ContextHasCachedData(nsStyleContext* aContext,
+ nsStyleStructID aSID)
+{
+ return !!aContext->GetCachedStyleData(aSID);
+}
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 04:21:50 +0000