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-o -iname "*.h" \
-o -iname "*.c" \
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}
convert MOZ_OVERRIDE override
convert MOZ_FINAL final
134 lines
4.3 KiB
C++
134 lines
4.3 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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#ifndef __NS_SVGCLIPPATHFRAME_H__
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#define __NS_SVGCLIPPATHFRAME_H__
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#include "mozilla/Attributes.h"
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#include "gfxMatrix.h"
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#include "nsSVGContainerFrame.h"
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#include "nsSVGUtils.h"
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class gfxContext;
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class nsISVGChildFrame;
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typedef nsSVGContainerFrame nsSVGClipPathFrameBase;
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class nsSVGClipPathFrame : public nsSVGClipPathFrameBase
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{
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friend nsIFrame*
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NS_NewSVGClipPathFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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protected:
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explicit nsSVGClipPathFrame(nsStyleContext* aContext)
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: nsSVGClipPathFrameBase(aContext)
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, mInUse(false)
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{
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AddStateBits(NS_FRAME_IS_NONDISPLAY);
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}
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public:
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NS_DECL_FRAMEARENA_HELPERS
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// nsIFrame methods:
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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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// nsSVGClipPathFrame methods:
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/**
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* If the SVG clipPath is simple (as determined by the IsTrivial() method),
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* calling this method simply pushes a clip path onto the DrawTarget. If the
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* SVG clipPath is not simple then calling this method will paint the
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* clipPath's contents (geometry being filled only, with opaque black) to the
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* DrawTarget. In this latter case callers are expected to first push a
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* group before calling this method, then pop the group after calling and use
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* it as a mask to mask the clipped frame.
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*
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* XXXjwatt Maybe split this into two methods.
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*/
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nsresult ApplyClipOrPaintClipMask(gfxContext& aContext,
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nsIFrame* aClippedFrame,
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const gfxMatrix &aMatrix);
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/**
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* aPoint is expected to be in aClippedFrame's SVG user space.
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*/
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bool PointIsInsideClipPath(nsIFrame* aClippedFrame, const gfxPoint &aPoint);
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// Check if this clipPath is made up of more than one geometry object.
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// If so, the clipping API in cairo isn't enough and we need to use
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// mask based clipping.
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bool IsTrivial(nsISVGChildFrame **aSingleChild = nullptr);
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bool IsValid();
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// nsIFrame interface:
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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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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) 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::svgClipPathFrame
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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("SVGClipPath"), aResult);
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}
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#endif
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SVGBBox
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GetBBoxForClipPathFrame(const SVGBBox &aBBox, const gfxMatrix &aMatrix);
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/**
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* If the clipPath element transforms its children due to
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* clipPathUnits="objectBoundingBox" being set on it and/or due to the
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* 'transform' attribute being set on it, this function returns the resulting
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* transform.
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*/
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gfxMatrix GetClipPathTransform(nsIFrame* aClippedFrame);
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private:
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// A helper class to allow us to paint clip paths safely. The helper
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// automatically sets and clears the mInUse flag on the clip path frame
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// (to prevent nasty reference loops). It's easy to mess this up
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// and break things, so this helper makes the code far more robust.
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class MOZ_STACK_CLASS AutoClipPathReferencer
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{
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public:
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explicit AutoClipPathReferencer(nsSVGClipPathFrame *aFrame
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: mFrame(aFrame) {
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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NS_ASSERTION(!mFrame->mInUse, "reference loop!");
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mFrame->mInUse = true;
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}
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~AutoClipPathReferencer() {
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mFrame->mInUse = false;
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}
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private:
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nsSVGClipPathFrame *mFrame;
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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gfxMatrix mMatrixForChildren;
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// recursion prevention flag
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bool mInUse;
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// nsSVGContainerFrame methods:
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virtual gfxMatrix GetCanvasTM() override;
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};
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#endif
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