148 lines
4.2 KiB
C++
148 lines
4.2 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 "gfxMatrix.h"
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#include "mozilla/dom/SVGAElement.h"
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#include "nsAutoPtr.h"
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#include "nsSVGContainerFrame.h"
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#include "nsSVGIntegrationUtils.h"
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#include "nsSVGUtils.h"
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#include "SVGLengthList.h"
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using namespace mozilla;
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class nsSVGAFrame : public nsSVGDisplayContainerFrame
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{
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friend nsIFrame*
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NS_NewSVGAFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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protected:
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explicit nsSVGAFrame(nsStyleContext* aContext)
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: nsSVGDisplayContainerFrame(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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// nsIFrame:
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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType) override;
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/**
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* Get the "type" of the frame
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*
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* @see nsGkAtoms::svgAFrame
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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("SVGA"), aResult);
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}
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#endif
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// nsISVGChildFrame interface:
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virtual void NotifySVGChanged(uint32_t aFlags) override;
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// nsSVGContainerFrame methods:
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virtual gfxMatrix GetCanvasTM() override;
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private:
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nsAutoPtr<gfxMatrix> mCanvasTM;
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};
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//----------------------------------------------------------------------
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// Implementation
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nsIFrame*
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NS_NewSVGAFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsSVGAFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsSVGAFrame)
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//----------------------------------------------------------------------
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// nsIFrame methods
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#ifdef DEBUG
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void
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nsSVGAFrame::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::a),
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"Trying to construct an SVGAFrame for a "
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"content element that doesn't support the right interfaces");
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nsSVGDisplayContainerFrame::Init(aContent, aParent, aPrevInFlow);
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}
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#endif /* DEBUG */
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nsresult
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nsSVGAFrame::AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType)
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{
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if (aNameSpaceID == kNameSpaceID_None &&
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aAttribute == nsGkAtoms::transform) {
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// We don't invalidate for transform changes (the layers code does that).
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// Also note that SVGTransformableElement::GetAttributeChangeHint will
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// return nsChangeHint_UpdateOverflow for "transform" attribute changes
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// and cause DoApplyRenderingChangeToTree to make the SchedulePaint call.
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NotifySVGChanged(TRANSFORM_CHANGED);
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}
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return NS_OK;
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}
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nsIAtom *
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nsSVGAFrame::GetType() const
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{
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return nsGkAtoms::svgAFrame;
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}
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//----------------------------------------------------------------------
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// nsISVGChildFrame methods
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void
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nsSVGAFrame::NotifySVGChanged(uint32_t aFlags)
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{
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MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
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"Invalidation logic may need adjusting");
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if (aFlags & TRANSFORM_CHANGED) {
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// make sure our cached transform matrix gets (lazily) updated
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mCanvasTM = nullptr;
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}
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nsSVGDisplayContainerFrame::NotifySVGChanged(aFlags);
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}
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//----------------------------------------------------------------------
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// nsSVGContainerFrame methods:
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gfxMatrix
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nsSVGAFrame::GetCanvasTM()
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{
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if (!mCanvasTM) {
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NS_ASSERTION(GetParent(), "null parent");
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nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(GetParent());
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dom::SVGAElement *content = static_cast<dom::SVGAElement*>(mContent);
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gfxMatrix tm = content->PrependLocalTransformsTo(parent->GetCanvasTM());
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mCanvasTM = new gfxMatrix(tm);
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}
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return *mCanvasTM;
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}
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