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-rw-r--r--layout/svg/nsSVGInnerSVGFrame.cpp322
1 files changed, 322 insertions, 0 deletions
diff --git a/layout/svg/nsSVGInnerSVGFrame.cpp b/layout/svg/nsSVGInnerSVGFrame.cpp
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+++ b/layout/svg/nsSVGInnerSVGFrame.cpp
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+// Main header first:
+#include "nsSVGInnerSVGFrame.h"
+
+// Keep others in (case-insensitive) order:
+#include "gfx2DGlue.h"
+#include "gfxContext.h"
+#include "nsIFrame.h"
+#include "nsISVGChildFrame.h"
+#include "nsSVGContainerFrame.h"
+#include "nsSVGIntegrationUtils.h"
+#include "mozilla/dom/SVGSVGElement.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+using namespace mozilla::gfx;
+using namespace mozilla::image;
+
+nsIFrame*
+NS_NewSVGInnerSVGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+ return new (aPresShell) nsSVGInnerSVGFrame(aContext);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsSVGInnerSVGFrame)
+
+//----------------------------------------------------------------------
+// nsIFrame methods
+
+NS_QUERYFRAME_HEAD(nsSVGInnerSVGFrame)
+ NS_QUERYFRAME_ENTRY(nsSVGInnerSVGFrame)
+ NS_QUERYFRAME_ENTRY(nsISVGSVGFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsSVGDisplayContainerFrame)
+
+#ifdef DEBUG
+void
+nsSVGInnerSVGFrame::Init(nsIContent* aContent,
+ nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow)
+{
+ NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::svg),
+ "Content is not an SVG 'svg' element!");
+
+ nsSVGDisplayContainerFrame::Init(aContent, aParent, aPrevInFlow);
+}
+#endif /* DEBUG */
+
+nsIAtom *
+nsSVGInnerSVGFrame::GetType() const
+{
+ return nsGkAtoms::svgInnerSVGFrame;
+}
+
+//----------------------------------------------------------------------
+// nsISVGChildFrame methods
+
+DrawResult
+nsSVGInnerSVGFrame::PaintSVG(gfxContext& aContext,
+ const gfxMatrix& aTransform,
+ const nsIntRect *aDirtyRect)
+{
+ NS_ASSERTION(!NS_SVGDisplayListPaintingEnabled() ||
+ (mState & NS_FRAME_IS_NONDISPLAY),
+ "If display lists are enabled, only painting of non-display "
+ "SVG should take this code path");
+
+ gfxContextAutoSaveRestore autoSR;
+
+ if (StyleDisplay()->IsScrollableOverflow()) {
+ float x, y, width, height;
+ static_cast<SVGSVGElement*>(mContent)->
+ GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
+
+ if (width <= 0 || height <= 0) {
+ return DrawResult::SUCCESS;
+ }
+
+ autoSR.SetContext(&aContext);
+ gfxRect clipRect =
+ nsSVGUtils::GetClipRectForFrame(this, x, y, width, height);
+ nsSVGUtils::SetClipRect(&aContext, aTransform, clipRect);
+ }
+
+ return nsSVGDisplayContainerFrame::PaintSVG(aContext, aTransform, aDirtyRect);
+}
+
+nsRect
+nsSVGInnerSVGFrame::GetCoveredRegion()
+{
+ float x, y, w, h;
+ static_cast<SVGSVGElement*>(mContent)->
+ GetAnimatedLengthValues(&x, &y, &w, &h, nullptr);
+ if (w < 0.0f) w = 0.0f;
+ if (h < 0.0f) h = 0.0f;
+ // GetCanvasTM includes the x,y translation
+ nsRect bounds = nsSVGUtils::ToCanvasBounds(gfxRect(0.0, 0.0, w, h),
+ GetCanvasTM(),
+ PresContext());
+
+ if (!StyleDisplay()->IsScrollableOverflow()) {
+ bounds.UnionRect(bounds, nsSVGUtils::GetCoveredRegion(mFrames));
+ }
+ return bounds;
+}
+
+void
+nsSVGInnerSVGFrame::ReflowSVG()
+{
+ // mRect must be set before FinishAndStoreOverflow is called in order
+ // for our overflow areas to be clipped correctly.
+ float x, y, width, height;
+ static_cast<SVGSVGElement*>(mContent)->
+ GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
+ mRect = nsLayoutUtils::RoundGfxRectToAppRect(
+ gfxRect(x, y, width, height),
+ PresContext()->AppUnitsPerCSSPixel());
+
+ // If we have a filter, we need to invalidate ourselves because filter
+ // output can change even if none of our descendants need repainting.
+ if (StyleEffects()->HasFilters()) {
+ InvalidateFrame();
+ }
+
+ nsSVGDisplayContainerFrame::ReflowSVG();
+}
+
+void
+nsSVGInnerSVGFrame::NotifySVGChanged(uint32_t aFlags)
+{
+ MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
+ "Invalidation logic may need adjusting");
+
+ if (aFlags & COORD_CONTEXT_CHANGED) {
+
+ SVGSVGElement *svg = static_cast<SVGSVGElement*>(mContent);
+
+ bool xOrYIsPercentage =
+ svg->mLengthAttributes[SVGSVGElement::ATTR_X].IsPercentage() ||
+ svg->mLengthAttributes[SVGSVGElement::ATTR_Y].IsPercentage();
+ bool widthOrHeightIsPercentage =
+ svg->mLengthAttributes[SVGSVGElement::ATTR_WIDTH].IsPercentage() ||
+ svg->mLengthAttributes[SVGSVGElement::ATTR_HEIGHT].IsPercentage();
+
+ if (xOrYIsPercentage || widthOrHeightIsPercentage) {
+ // Ancestor changes can't affect how we render from the perspective of
+ // any rendering observers that we may have, so we don't need to
+ // invalidate them. We also don't need to invalidate ourself, since our
+ // changed ancestor will have invalidated its entire area, which includes
+ // our area.
+ // For perf reasons we call this before calling NotifySVGChanged() below.
+ nsSVGUtils::ScheduleReflowSVG(this);
+ }
+
+ // Coordinate context changes affect mCanvasTM if we have a
+ // percentage 'x' or 'y', or if we have a percentage 'width' or 'height' AND
+ // a 'viewBox'.
+
+ if (!(aFlags & TRANSFORM_CHANGED) &&
+ (xOrYIsPercentage ||
+ (widthOrHeightIsPercentage && svg->HasViewBoxRect()))) {
+ aFlags |= TRANSFORM_CHANGED;
+ }
+
+ if (svg->HasViewBoxRect() || !widthOrHeightIsPercentage) {
+ // Remove COORD_CONTEXT_CHANGED, since we establish the coordinate
+ // context for our descendants and this notification won't change its
+ // dimensions:
+ aFlags &= ~COORD_CONTEXT_CHANGED;
+
+ if (!aFlags) {
+ return; // No notification flags left
+ }
+ }
+ }
+
+ if (aFlags & TRANSFORM_CHANGED) {
+ // make sure our cached transform matrix gets (lazily) updated
+ mCanvasTM = nullptr;
+ }
+
+ nsSVGDisplayContainerFrame::NotifySVGChanged(aFlags);
+}
+
+nsresult
+nsSVGInnerSVGFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType)
+{
+ if (aNameSpaceID == kNameSpaceID_None &&
+ !(GetStateBits() & NS_FRAME_IS_NONDISPLAY)) {
+
+ SVGSVGElement* content = static_cast<SVGSVGElement*>(mContent);
+
+ if (aAttribute == nsGkAtoms::width ||
+ aAttribute == nsGkAtoms::height) {
+ nsLayoutUtils::PostRestyleEvent(
+ mContent->AsElement(), nsRestyleHint(0),
+ nsChangeHint_InvalidateRenderingObservers);
+ nsSVGUtils::ScheduleReflowSVG(this);
+
+ if (content->HasViewBoxOrSyntheticViewBox()) {
+ // make sure our cached transform matrix gets (lazily) updated
+ mCanvasTM = nullptr;
+ content->ChildrenOnlyTransformChanged();
+ nsSVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
+ } else {
+ uint32_t flags = COORD_CONTEXT_CHANGED;
+ if (mCanvasTM && mCanvasTM->IsSingular()) {
+ mCanvasTM = nullptr;
+ flags |= TRANSFORM_CHANGED;
+ }
+ nsSVGUtils::NotifyChildrenOfSVGChange(this, flags);
+ }
+
+ } else if (aAttribute == nsGkAtoms::transform ||
+ aAttribute == nsGkAtoms::preserveAspectRatio ||
+ aAttribute == nsGkAtoms::viewBox ||
+ aAttribute == nsGkAtoms::x ||
+ aAttribute == nsGkAtoms::y) {
+ // make sure our cached transform matrix gets (lazily) updated
+ mCanvasTM = nullptr;
+
+ nsSVGUtils::NotifyChildrenOfSVGChange(
+ this, aAttribute == nsGkAtoms::viewBox ?
+ TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED : TRANSFORM_CHANGED);
+
+ // We don't invalidate for transform changes (the layers code does that).
+ // Also note that SVGTransformableElement::GetAttributeChangeHint will
+ // return nsChangeHint_UpdateOverflow for "transform" attribute changes
+ // and cause DoApplyRenderingChangeToTree to make the SchedulePaint call.
+
+ if (aAttribute == nsGkAtoms::x || aAttribute == nsGkAtoms::y) {
+ nsLayoutUtils::PostRestyleEvent(
+ mContent->AsElement(), nsRestyleHint(0),
+ nsChangeHint_InvalidateRenderingObservers);
+ nsSVGUtils::ScheduleReflowSVG(this);
+ } else if (aAttribute == nsGkAtoms::viewBox ||
+ (aAttribute == nsGkAtoms::preserveAspectRatio &&
+ content->HasViewBoxOrSyntheticViewBox())) {
+ content->ChildrenOnlyTransformChanged();
+ // SchedulePaint sets a global state flag so we only need to call it once
+ // (on ourself is fine), not once on each child (despite bug 828240).
+ SchedulePaint();
+ }
+ }
+ }
+
+ return NS_OK;
+}
+
+nsIFrame*
+nsSVGInnerSVGFrame::GetFrameForPoint(const gfxPoint& aPoint)
+{
+ NS_ASSERTION(!NS_SVGDisplayListHitTestingEnabled() ||
+ (mState & NS_FRAME_IS_NONDISPLAY),
+ "If display lists are enabled, only hit-testing of non-display "
+ "SVG should take this code path");
+
+ if (StyleDisplay()->IsScrollableOverflow()) {
+ Rect clip;
+ static_cast<nsSVGElement*>(mContent)->
+ GetAnimatedLengthValues(&clip.x, &clip.y,
+ &clip.width, &clip.height, nullptr);
+ if (!clip.Contains(ToPoint(aPoint))) {
+ return nullptr;
+ }
+ }
+
+ return nsSVGDisplayContainerFrame::GetFrameForPoint(aPoint);
+}
+
+//----------------------------------------------------------------------
+// nsISVGSVGFrame methods:
+
+void
+nsSVGInnerSVGFrame::NotifyViewportOrTransformChanged(uint32_t aFlags)
+{
+ // The dimensions of inner-<svg> frames are purely defined by their "width"
+ // and "height" attributes, and transform changes can only occur as a result
+ // of changes to their "width", "height", "viewBox" or "preserveAspectRatio"
+ // attributes. Changes to all of these attributes are handled in
+ // AttributeChanged(), so we should never be called.
+ NS_ERROR("Not called for nsSVGInnerSVGFrame");
+}
+
+//----------------------------------------------------------------------
+// nsSVGContainerFrame methods:
+
+gfxMatrix
+nsSVGInnerSVGFrame::GetCanvasTM()
+{
+ if (!mCanvasTM) {
+ NS_ASSERTION(GetParent(), "null parent");
+
+ nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(GetParent());
+ SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent);
+
+ gfxMatrix tm = content->PrependLocalTransformsTo(parent->GetCanvasTM());
+
+ mCanvasTM = new gfxMatrix(tm);
+ }
+ return *mCanvasTM;
+}
+
+bool
+nsSVGInnerSVGFrame::HasChildrenOnlyTransform(gfx::Matrix *aTransform) const
+{
+ SVGSVGElement *content = static_cast<SVGSVGElement*>(mContent);
+
+ if (content->HasViewBoxOrSyntheticViewBox()) {
+ // XXX Maybe return false if the transform is the identity transform?
+ if (aTransform) {
+ *aTransform = content->GetViewBoxTransform();
+ }
+ return true;
+ }
+ return false;
+}