mirror of
https://github.com/classilla/tenfourfox.git
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270 lines
8.0 KiB
C++
270 lines
8.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Keep in (case-insensitive) order:
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#include "gfxRect.h"
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#include "nsSVGEffects.h"
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#include "nsSVGGFrame.h"
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#include "mozilla/dom/SVGSwitchElement.h"
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#include "nsSVGUtils.h"
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using namespace mozilla::gfx;
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typedef nsSVGGFrame nsSVGSwitchFrameBase;
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class nsSVGSwitchFrame : public nsSVGSwitchFrameBase
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{
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friend nsIFrame*
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NS_NewSVGSwitchFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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protected:
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explicit nsSVGSwitchFrame(nsStyleContext* aContext) :
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nsSVGSwitchFrameBase(aContext) {}
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public:
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NS_DECL_FRAMEARENA_HELPERS
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#ifdef DEBUG
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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#endif
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/**
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* Get the "type" of the frame
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*
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* @see nsGkAtoms::svgSwitchFrame
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*/
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virtual nsIAtom* GetType() const override;
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override
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{
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return MakeFrameName(NS_LITERAL_STRING("SVGSwitch"), aResult);
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}
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#endif
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists) override;
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// nsISVGChildFrame interface:
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virtual nsresult PaintSVG(gfxContext& aContext,
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const gfxMatrix& aTransform,
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const nsIntRect* aDirtyRect = nullptr) override;
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nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) override;
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nsRect GetCoveredRegion() override;
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virtual void ReflowSVG() override;
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virtual SVGBBox GetBBoxContribution(const Matrix &aToBBoxUserspace,
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uint32_t aFlags) override;
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private:
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nsIFrame *GetActiveChildFrame();
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};
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//----------------------------------------------------------------------
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// Implementation
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nsIFrame*
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NS_NewSVGSwitchFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsSVGSwitchFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsSVGSwitchFrame)
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#ifdef DEBUG
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void
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nsSVGSwitchFrame::Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::svgSwitch),
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"Content is not an SVG switch");
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nsSVGSwitchFrameBase::Init(aContent, aParent, aPrevInFlow);
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}
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#endif /* DEBUG */
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nsIAtom *
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nsSVGSwitchFrame::GetType() const
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{
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return nsGkAtoms::svgSwitchFrame;
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}
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void
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nsSVGSwitchFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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nsIFrame* kid = GetActiveChildFrame();
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if (kid) {
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BuildDisplayListForChild(aBuilder, kid, aDirtyRect, aLists);
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}
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}
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nsresult
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nsSVGSwitchFrame::PaintSVG(gfxContext& aContext,
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const gfxMatrix& aTransform,
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const nsIntRect* aDirtyRect)
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{
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NS_ASSERTION(!NS_SVGDisplayListPaintingEnabled() ||
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(mState & NS_FRAME_IS_NONDISPLAY),
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"If display lists are enabled, only painting of non-display "
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"SVG should take this code path");
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if (StyleDisplay()->mOpacity == 0.0)
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return NS_OK;
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nsIFrame *kid = GetActiveChildFrame();
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if (kid) {
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gfxMatrix tm = aTransform;
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if (kid->GetContent()->IsSVGElement()) {
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tm = static_cast<nsSVGElement*>(kid->GetContent())->
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PrependLocalTransformsTo(tm, eUserSpaceToParent);
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}
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nsSVGUtils::PaintFrameWithEffects(kid, aContext, tm, aDirtyRect);
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}
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return NS_OK;
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}
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nsIFrame*
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nsSVGSwitchFrame::GetFrameForPoint(const gfxPoint& aPoint)
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{
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NS_ASSERTION(!NS_SVGDisplayListHitTestingEnabled() ||
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(mState & NS_FRAME_IS_NONDISPLAY),
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"If display lists are enabled, only hit-testing of non-display "
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"SVG should take this code path");
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nsIFrame *kid = GetActiveChildFrame();
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nsISVGChildFrame* svgFrame = do_QueryFrame(kid);
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if (svgFrame) {
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// Transform the point from our SVG user space to our child's.
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gfxPoint point = aPoint;
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gfxMatrix m =
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static_cast<const nsSVGElement*>(mContent)->
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PrependLocalTransformsTo(gfxMatrix(), eChildToUserSpace);
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m = static_cast<const nsSVGElement*>(kid->GetContent())->
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PrependLocalTransformsTo(m, eUserSpaceToParent);
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if (!m.IsIdentity()) {
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if (!m.Invert()) {
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return nullptr;
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}
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point = m.Transform(point);
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}
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return svgFrame->GetFrameForPoint(point);
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}
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return nullptr;
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}
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nsRect
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nsSVGSwitchFrame::GetCoveredRegion()
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{
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nsRect rect;
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nsIFrame *kid = GetActiveChildFrame();
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nsISVGChildFrame* child = do_QueryFrame(kid);
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if (child) {
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rect = child->GetCoveredRegion();
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}
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return rect;
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}
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void
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nsSVGSwitchFrame::ReflowSVG()
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{
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NS_ASSERTION(nsSVGUtils::OuterSVGIsCallingReflowSVG(this),
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"This call is probably a wasteful mistake");
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MOZ_ASSERT(!(GetStateBits() & NS_FRAME_IS_NONDISPLAY),
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"ReflowSVG mechanism not designed for this");
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if (!nsSVGUtils::NeedsReflowSVG(this)) {
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return;
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}
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// If the NS_FRAME_FIRST_REFLOW bit has been removed from our parent frame,
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// then our outer-<svg> has previously had its initial reflow. In that case
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// we need to make sure that that bit has been removed from ourself _before_
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// recursing over our children to ensure that they know too. Otherwise, we
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// need to remove it _after_ recursing over our children so that they know
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// the initial reflow is currently underway.
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bool isFirstReflow = (mState & NS_FRAME_FIRST_REFLOW);
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bool outerSVGHasHadFirstReflow =
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(GetParent()->GetStateBits() & NS_FRAME_FIRST_REFLOW) == 0;
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if (outerSVGHasHadFirstReflow) {
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mState &= ~NS_FRAME_FIRST_REFLOW; // tell our children
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}
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nsOverflowAreas overflowRects;
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nsIFrame *child = GetActiveChildFrame();
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nsISVGChildFrame* svgChild = do_QueryFrame(child);
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if (svgChild) {
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MOZ_ASSERT(!(child->GetStateBits() & NS_FRAME_IS_NONDISPLAY),
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"Check for this explicitly in the |if|, then");
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svgChild->ReflowSVG();
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// We build up our child frame overflows here instead of using
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// nsLayoutUtils::UnionChildOverflow since SVG frame's all use the same
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// frame list, and we're iterating over that list now anyway.
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ConsiderChildOverflow(overflowRects, child);
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}
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if (isFirstReflow) {
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// Make sure we have our filter property (if any) before calling
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// FinishAndStoreOverflow (subsequent filter changes are handled off
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// nsChangeHint_UpdateEffects):
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nsSVGEffects::UpdateEffects(this);
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}
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FinishAndStoreOverflow(overflowRects, mRect.Size());
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// Remove state bits after FinishAndStoreOverflow so that it doesn't
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// invalidate on first reflow:
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mState &= ~(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
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NS_FRAME_HAS_DIRTY_CHILDREN);
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}
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SVGBBox
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nsSVGSwitchFrame::GetBBoxContribution(const Matrix &aToBBoxUserspace,
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uint32_t aFlags)
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{
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nsIFrame* kid = GetActiveChildFrame();
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nsISVGChildFrame* svgKid = do_QueryFrame(kid);
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if (svgKid) {
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nsIContent *content = kid->GetContent();
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gfxMatrix transform = ThebesMatrix(aToBBoxUserspace);
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if (content->IsSVGElement()) {
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transform = static_cast<nsSVGElement*>(content)->
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PrependLocalTransformsTo(transform);
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}
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return svgKid->GetBBoxContribution(ToMatrix(transform), aFlags);
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}
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return SVGBBox();
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}
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nsIFrame *
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nsSVGSwitchFrame::GetActiveChildFrame()
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{
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nsIContent *activeChild =
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static_cast<mozilla::dom::SVGSwitchElement*>(mContent)->GetActiveChild();
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if (activeChild) {
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for (nsIFrame* kid = mFrames.FirstChild(); kid;
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kid = kid->GetNextSibling()) {
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if (activeChild == kid->GetContent()) {
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return kid;
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}
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}
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}
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return nullptr;
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}
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