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-rw-r--r--dom/svg/nsSVGLength2.cpp529
1 files changed, 529 insertions, 0 deletions
diff --git a/dom/svg/nsSVGLength2.cpp b/dom/svg/nsSVGLength2.cpp
new file mode 100644
index 000000000..1deec1006
--- /dev/null
+++ b/dom/svg/nsSVGLength2.cpp
@@ -0,0 +1,529 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#include "mozilla/ArrayUtils.h"
+
+#include "nsSVGLength2.h"
+#include "mozilla/dom/SVGAnimatedLength.h"
+#include "mozilla/dom/SVGSVGElement.h"
+#include "nsContentUtils.h" // NS_ENSURE_FINITE
+#include "nsIFrame.h"
+#include "nsSMILFloatType.h"
+#include "nsSMILValue.h"
+#include "nsSVGAttrTearoffTable.h"
+#include "nsSVGIntegrationUtils.h"
+#include "nsTextFormatter.h"
+#include "DOMSVGLength.h"
+#include "LayoutLogging.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+static nsIAtom** const unitMap[] =
+{
+ nullptr, /* SVG_LENGTHTYPE_UNKNOWN */
+ nullptr, /* SVG_LENGTHTYPE_NUMBER */
+ &nsGkAtoms::percentage,
+ &nsGkAtoms::em,
+ &nsGkAtoms::ex,
+ &nsGkAtoms::px,
+ &nsGkAtoms::cm,
+ &nsGkAtoms::mm,
+ &nsGkAtoms::in,
+ &nsGkAtoms::pt,
+ &nsGkAtoms::pc
+};
+
+static nsSVGAttrTearoffTable<nsSVGLength2, SVGAnimatedLength>
+ sSVGAnimatedLengthTearoffTable;
+
+/* Helper functions */
+
+static bool
+IsValidUnitType(uint16_t unit)
+{
+ if (unit > nsIDOMSVGLength::SVG_LENGTHTYPE_UNKNOWN &&
+ unit <= nsIDOMSVGLength::SVG_LENGTHTYPE_PC)
+ return true;
+
+ return false;
+}
+
+static void
+GetUnitString(nsAString& unit, uint16_t unitType)
+{
+ if (IsValidUnitType(unitType)) {
+ if (unitMap[unitType]) {
+ (*unitMap[unitType])->ToString(unit);
+ }
+ return;
+ }
+
+ NS_NOTREACHED("Unknown unit type");
+ return;
+}
+
+static uint16_t
+GetUnitTypeForString(const nsAString& unitStr)
+{
+ if (unitStr.IsEmpty())
+ return nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER;
+
+ nsIAtom *unitAtom = NS_GetStaticAtom(unitStr);
+ if (unitAtom) {
+ for (uint32_t i = 0 ; i < ArrayLength(unitMap) ; i++) {
+ if (unitMap[i] && *unitMap[i] == unitAtom) {
+ return i;
+ }
+ }
+ }
+
+ return nsIDOMSVGLength::SVG_LENGTHTYPE_UNKNOWN;
+}
+
+static void
+GetValueString(nsAString &aValueAsString, float aValue, uint16_t aUnitType)
+{
+ char16_t buf[24];
+ nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
+ u"%g",
+ (double)aValue);
+ aValueAsString.Assign(buf);
+
+ nsAutoString unitString;
+ GetUnitString(unitString, aUnitType);
+ aValueAsString.Append(unitString);
+}
+
+static bool
+GetValueFromString(const nsAString& aString,
+ float& aValue,
+ uint16_t* aUnitType)
+{
+ RangedPtr<const char16_t> iter =
+ SVGContentUtils::GetStartRangedPtr(aString);
+ const RangedPtr<const char16_t> end =
+ SVGContentUtils::GetEndRangedPtr(aString);
+
+ if (!SVGContentUtils::ParseNumber(iter, end, aValue)) {
+ return false;
+ }
+ const nsAString& units = Substring(iter.get(), end.get());
+ *aUnitType = GetUnitTypeForString(units);
+ return IsValidUnitType(*aUnitType);
+}
+
+static float GetMMPerPixel() { return MM_PER_INCH_FLOAT / 96; }
+
+static float
+FixAxisLength(float aLength)
+{
+ if (aLength == 0.0f) {
+ LAYOUT_WARNING("zero axis length");
+ return 1e-20f;
+ }
+ return aLength;
+}
+
+SVGElementMetrics::SVGElementMetrics(nsSVGElement* aSVGElement,
+ SVGSVGElement* aCtx)
+ : mSVGElement(aSVGElement)
+ , mCtx(aCtx)
+{
+}
+
+float
+SVGElementMetrics::GetEmLength() const
+{
+ return SVGContentUtils::GetFontSize(mSVGElement);
+}
+
+float
+SVGElementMetrics::GetExLength() const
+{
+ return SVGContentUtils::GetFontXHeight(mSVGElement);
+}
+
+float
+SVGElementMetrics::GetAxisLength(uint8_t aCtxType) const
+{
+ if (!EnsureCtx()) {
+ return 1;
+ }
+
+ return FixAxisLength(mCtx->GetLength(aCtxType));
+}
+
+bool
+SVGElementMetrics::EnsureCtx() const
+{
+ if (!mCtx && mSVGElement) {
+ mCtx = mSVGElement->GetCtx();
+ if (!mCtx && mSVGElement->IsSVGElement(nsGkAtoms::svg)) {
+ // mSVGElement must be the outer svg element
+ mCtx = static_cast<SVGSVGElement*>(mSVGElement);
+ }
+ }
+ return mCtx != nullptr;
+}
+
+NonSVGFrameUserSpaceMetrics::NonSVGFrameUserSpaceMetrics(nsIFrame* aFrame)
+ : mFrame(aFrame)
+{
+}
+
+float
+NonSVGFrameUserSpaceMetrics::GetEmLength() const
+{
+ return SVGContentUtils::GetFontSize(mFrame);
+}
+
+float
+NonSVGFrameUserSpaceMetrics::GetExLength() const
+{
+ return SVGContentUtils::GetFontXHeight(mFrame);
+}
+
+gfx::Size
+NonSVGFrameUserSpaceMetrics::GetSize() const
+{
+ return nsSVGIntegrationUtils::GetSVGCoordContextForNonSVGFrame(mFrame);
+}
+
+float
+UserSpaceMetricsWithSize::GetAxisLength(uint8_t aCtxType) const
+{
+ gfx::Size size = GetSize();
+ float length;
+ switch (aCtxType) {
+ case SVGContentUtils::X:
+ length = size.width;
+ break;
+ case SVGContentUtils::Y:
+ length = size.height;
+ break;
+ case SVGContentUtils::XY:
+ length = SVGContentUtils::ComputeNormalizedHypotenuse(size.width, size.height);
+ break;
+ default:
+ NS_NOTREACHED("Unknown axis type");
+ length = 1;
+ break;
+ }
+ return FixAxisLength(length);
+}
+
+float
+nsSVGLength2::GetUnitScaleFactor(nsSVGElement *aSVGElement,
+ uint8_t aUnitType) const
+{
+ return GetUnitScaleFactor(SVGElementMetrics(aSVGElement), aUnitType);
+}
+
+float
+nsSVGLength2::GetUnitScaleFactor(SVGSVGElement *aCtx, uint8_t aUnitType) const
+{
+ return GetUnitScaleFactor(SVGElementMetrics(aCtx, aCtx), aUnitType);
+}
+
+float
+nsSVGLength2::GetUnitScaleFactor(nsIFrame *aFrame, uint8_t aUnitType) const
+{
+ nsIContent* content = aFrame->GetContent();
+ if (content->IsSVGElement()) {
+ return GetUnitScaleFactor(SVGElementMetrics(static_cast<nsSVGElement*>(content)), aUnitType);
+ }
+ return GetUnitScaleFactor(NonSVGFrameUserSpaceMetrics(aFrame), aUnitType);
+}
+
+float
+nsSVGLength2::GetUnitScaleFactor(const UserSpaceMetrics& aMetrics, uint8_t aUnitType) const
+{
+ switch (aUnitType) {
+ case nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER:
+ case nsIDOMSVGLength::SVG_LENGTHTYPE_PX:
+ return 1;
+ case nsIDOMSVGLength::SVG_LENGTHTYPE_MM:
+ return GetMMPerPixel();
+ case nsIDOMSVGLength::SVG_LENGTHTYPE_CM:
+ return GetMMPerPixel() / 10.0f;
+ case nsIDOMSVGLength::SVG_LENGTHTYPE_IN:
+ return GetMMPerPixel() / MM_PER_INCH_FLOAT;
+ case nsIDOMSVGLength::SVG_LENGTHTYPE_PT:
+ return GetMMPerPixel() * POINTS_PER_INCH_FLOAT / MM_PER_INCH_FLOAT;
+ case nsIDOMSVGLength::SVG_LENGTHTYPE_PC:
+ return GetMMPerPixel() * POINTS_PER_INCH_FLOAT / MM_PER_INCH_FLOAT / 12.0f;
+ case nsIDOMSVGLength::SVG_LENGTHTYPE_PERCENTAGE:
+ return 100.0f / aMetrics.GetAxisLength(mCtxType);
+ case nsIDOMSVGLength::SVG_LENGTHTYPE_EMS:
+ return 1 / aMetrics.GetEmLength();
+ case nsIDOMSVGLength::SVG_LENGTHTYPE_EXS:
+ return 1 / aMetrics.GetExLength();
+ default:
+ NS_NOTREACHED("Unknown unit type");
+ return 0;
+ }
+}
+
+void
+nsSVGLength2::SetBaseValueInSpecifiedUnits(float aValue,
+ nsSVGElement *aSVGElement,
+ bool aDoSetAttr)
+{
+ if (mIsBaseSet && mBaseVal == aValue) {
+ return;
+ }
+
+ nsAttrValue emptyOrOldValue;
+ if (aDoSetAttr) {
+ emptyOrOldValue = aSVGElement->WillChangeLength(mAttrEnum);
+ }
+ mBaseVal = aValue;
+ mIsBaseSet = true;
+ if (!mIsAnimated) {
+ mAnimVal = mBaseVal;
+ }
+ else {
+ aSVGElement->AnimationNeedsResample();
+ }
+ if (aDoSetAttr) {
+ aSVGElement->DidChangeLength(mAttrEnum, emptyOrOldValue);
+ }
+}
+
+nsresult
+nsSVGLength2::ConvertToSpecifiedUnits(uint16_t unitType,
+ nsSVGElement *aSVGElement)
+{
+ if (!IsValidUnitType(unitType))
+ return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+
+ if (mIsBaseSet && mSpecifiedUnitType == uint8_t(unitType))
+ return NS_OK;
+
+ // Even though we're not changing the visual effect this length will have
+ // on the document, we still need to send out notifications in case we have
+ // mutation listeners, since the actual string value of the attribute will
+ // change.
+ nsAttrValue emptyOrOldValue = aSVGElement->WillChangeLength(mAttrEnum);
+
+ float valueInUserUnits =
+ mBaseVal / GetUnitScaleFactor(aSVGElement, mSpecifiedUnitType);
+ mSpecifiedUnitType = uint8_t(unitType);
+ // Setting aDoSetAttr to false here will ensure we don't call
+ // Will/DidChangeAngle a second time (and dispatch duplicate notifications).
+ SetBaseValue(valueInUserUnits, aSVGElement, false);
+
+ aSVGElement->DidChangeLength(mAttrEnum, emptyOrOldValue);
+
+ return NS_OK;
+}
+
+nsresult
+nsSVGLength2::NewValueSpecifiedUnits(uint16_t unitType,
+ float valueInSpecifiedUnits,
+ nsSVGElement *aSVGElement)
+{
+ NS_ENSURE_FINITE(valueInSpecifiedUnits, NS_ERROR_ILLEGAL_VALUE);
+
+ if (!IsValidUnitType(unitType))
+ return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
+
+ if (mIsBaseSet && mBaseVal == valueInSpecifiedUnits &&
+ mSpecifiedUnitType == uint8_t(unitType)) {
+ return NS_OK;
+ }
+
+ nsAttrValue emptyOrOldValue = aSVGElement->WillChangeLength(mAttrEnum);
+ mBaseVal = valueInSpecifiedUnits;
+ mIsBaseSet = true;
+ mSpecifiedUnitType = uint8_t(unitType);
+ if (!mIsAnimated) {
+ mAnimVal = mBaseVal;
+ }
+ else {
+ aSVGElement->AnimationNeedsResample();
+ }
+ aSVGElement->DidChangeLength(mAttrEnum, emptyOrOldValue);
+ return NS_OK;
+}
+
+nsresult
+nsSVGLength2::ToDOMBaseVal(DOMSVGLength **aResult, nsSVGElement *aSVGElement)
+{
+ RefPtr<DOMSVGLength> domBaseVal =
+ DOMSVGLength::GetTearOff(this, aSVGElement, false);
+
+ domBaseVal.forget(aResult);
+ return NS_OK;
+}
+
+nsresult
+nsSVGLength2::ToDOMAnimVal(DOMSVGLength **aResult, nsSVGElement *aSVGElement)
+{
+ RefPtr<DOMSVGLength> domAnimVal =
+ DOMSVGLength::GetTearOff(this, aSVGElement, true);
+
+ domAnimVal.forget(aResult);
+ return NS_OK;
+}
+
+/* Implementation */
+
+nsresult
+nsSVGLength2::SetBaseValueString(const nsAString &aValueAsString,
+ nsSVGElement *aSVGElement,
+ bool aDoSetAttr)
+{
+ float value;
+ uint16_t unitType;
+
+ if (!GetValueFromString(aValueAsString, value, &unitType)) {
+ return NS_ERROR_DOM_SYNTAX_ERR;
+ }
+
+ if (mIsBaseSet && mBaseVal == float(value) &&
+ mSpecifiedUnitType == uint8_t(unitType)) {
+ return NS_OK;
+ }
+
+ nsAttrValue emptyOrOldValue;
+ if (aDoSetAttr) {
+ emptyOrOldValue = aSVGElement->WillChangeLength(mAttrEnum);
+ }
+ mBaseVal = value;
+ mIsBaseSet = true;
+ mSpecifiedUnitType = uint8_t(unitType);
+ if (!mIsAnimated) {
+ mAnimVal = mBaseVal;
+ }
+ else {
+ aSVGElement->AnimationNeedsResample();
+ }
+
+ if (aDoSetAttr) {
+ aSVGElement->DidChangeLength(mAttrEnum, emptyOrOldValue);
+ }
+ return NS_OK;
+}
+
+void
+nsSVGLength2::GetBaseValueString(nsAString & aValueAsString) const
+{
+ GetValueString(aValueAsString, mBaseVal, mSpecifiedUnitType);
+}
+
+void
+nsSVGLength2::GetAnimValueString(nsAString & aValueAsString) const
+{
+ GetValueString(aValueAsString, mAnimVal, mSpecifiedUnitType);
+}
+
+void
+nsSVGLength2::SetBaseValue(float aValue, nsSVGElement *aSVGElement,
+ bool aDoSetAttr)
+{
+ SetBaseValueInSpecifiedUnits(aValue * GetUnitScaleFactor(aSVGElement,
+ mSpecifiedUnitType),
+ aSVGElement, aDoSetAttr);
+}
+
+void
+nsSVGLength2::SetAnimValueInSpecifiedUnits(float aValue,
+ nsSVGElement* aSVGElement)
+{
+ if (mAnimVal == aValue && mIsAnimated) {
+ return;
+ }
+ mAnimVal = aValue;
+ mIsAnimated = true;
+ aSVGElement->DidAnimateLength(mAttrEnum);
+}
+
+void
+nsSVGLength2::SetAnimValue(float aValue, nsSVGElement *aSVGElement)
+{
+ SetAnimValueInSpecifiedUnits(aValue * GetUnitScaleFactor(aSVGElement,
+ mSpecifiedUnitType),
+ aSVGElement);
+}
+
+already_AddRefed<SVGAnimatedLength>
+nsSVGLength2::ToDOMAnimatedLength(nsSVGElement* aSVGElement)
+{
+ RefPtr<SVGAnimatedLength> svgAnimatedLength =
+ sSVGAnimatedLengthTearoffTable.GetTearoff(this);
+ if (!svgAnimatedLength) {
+ svgAnimatedLength = new SVGAnimatedLength(this, aSVGElement);
+ sSVGAnimatedLengthTearoffTable.AddTearoff(this, svgAnimatedLength);
+ }
+
+ return svgAnimatedLength.forget();
+}
+
+SVGAnimatedLength::~SVGAnimatedLength()
+{
+ sSVGAnimatedLengthTearoffTable.RemoveTearoff(mVal);
+}
+
+nsISMILAttr*
+nsSVGLength2::ToSMILAttr(nsSVGElement *aSVGElement)
+{
+ return new SMILLength(this, aSVGElement);
+}
+
+nsresult
+nsSVGLength2::SMILLength::ValueFromString(const nsAString& aStr,
+ const SVGAnimationElement* /*aSrcElement*/,
+ nsSMILValue& aValue,
+ bool& aPreventCachingOfSandwich) const
+{
+ float value;
+ uint16_t unitType;
+
+ if (!GetValueFromString(aStr, value, &unitType)) {
+ return NS_ERROR_DOM_SYNTAX_ERR;
+ }
+
+ nsSMILValue val(nsSMILFloatType::Singleton());
+ val.mU.mDouble = value / mVal->GetUnitScaleFactor(mSVGElement, unitType);
+ aValue = val;
+ aPreventCachingOfSandwich =
+ (unitType == nsIDOMSVGLength::SVG_LENGTHTYPE_PERCENTAGE ||
+ unitType == nsIDOMSVGLength::SVG_LENGTHTYPE_EMS ||
+ unitType == nsIDOMSVGLength::SVG_LENGTHTYPE_EXS);
+
+ return NS_OK;
+}
+
+nsSMILValue
+nsSVGLength2::SMILLength::GetBaseValue() const
+{
+ nsSMILValue val(nsSMILFloatType::Singleton());
+ val.mU.mDouble = mVal->GetBaseValue(mSVGElement);
+ return val;
+}
+
+void
+nsSVGLength2::SMILLength::ClearAnimValue()
+{
+ if (mVal->mIsAnimated) {
+ mVal->mIsAnimated = false;
+ mVal->mAnimVal = mVal->mBaseVal;
+ mSVGElement->DidAnimateLength(mVal->mAttrEnum);
+ }
+}
+
+nsresult
+nsSVGLength2::SMILLength::SetAnimValue(const nsSMILValue& aValue)
+{
+ NS_ASSERTION(aValue.mType == nsSMILFloatType::Singleton(),
+ "Unexpected type to assign animated value");
+ if (aValue.mType == nsSMILFloatType::Singleton()) {
+ mVal->SetAnimValue(float(aValue.mU.mDouble), mSVGElement);
+ }
+ return NS_OK;
+}