1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/svg/nsSVGClipPathFrame.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,111 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef __NS_SVGCLIPPATHFRAME_H__
1.10 +#define __NS_SVGCLIPPATHFRAME_H__
1.11 +
1.12 +#include "mozilla/Attributes.h"
1.13 +#include "gfxMatrix.h"
1.14 +#include "nsSVGContainerFrame.h"
1.15 +#include "nsSVGUtils.h"
1.16 +
1.17 +class nsRenderingContext;
1.18 +class nsISVGChildFrame;
1.19 +
1.20 +typedef nsSVGContainerFrame nsSVGClipPathFrameBase;
1.21 +
1.22 +class nsSVGClipPathFrame : public nsSVGClipPathFrameBase
1.23 +{
1.24 + friend nsIFrame*
1.25 + NS_NewSVGClipPathFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
1.26 +protected:
1.27 + nsSVGClipPathFrame(nsStyleContext* aContext)
1.28 + : nsSVGClipPathFrameBase(aContext)
1.29 + , mInUse(false)
1.30 + {
1.31 + AddStateBits(NS_FRAME_IS_NONDISPLAY);
1.32 + }
1.33 +
1.34 +public:
1.35 + NS_DECL_FRAMEARENA_HELPERS
1.36 +
1.37 + // nsIFrame methods:
1.38 + virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
1.39 + const nsRect& aDirtyRect,
1.40 + const nsDisplayListSet& aLists) MOZ_OVERRIDE {}
1.41 +
1.42 + // nsSVGClipPathFrame methods:
1.43 + nsresult ClipPaint(nsRenderingContext* aContext,
1.44 + nsIFrame* aParent,
1.45 + const gfxMatrix &aMatrix);
1.46 +
1.47 + bool ClipHitTest(nsIFrame* aParent,
1.48 + const gfxMatrix &aMatrix,
1.49 + const nsPoint &aPoint);
1.50 +
1.51 + // Check if this clipPath is made up of more than one geometry object.
1.52 + // If so, the clipping API in cairo isn't enough and we need to use
1.53 + // mask based clipping.
1.54 + bool IsTrivial(nsISVGChildFrame **aSingleChild = nullptr);
1.55 +
1.56 + bool IsValid();
1.57 +
1.58 + // nsIFrame interface:
1.59 + virtual nsresult AttributeChanged(int32_t aNameSpaceID,
1.60 + nsIAtom* aAttribute,
1.61 + int32_t aModType) MOZ_OVERRIDE;
1.62 +
1.63 + virtual void Init(nsIContent* aContent,
1.64 + nsIFrame* aParent,
1.65 + nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
1.66 +
1.67 + /**
1.68 + * Get the "type" of the frame
1.69 + *
1.70 + * @see nsGkAtoms::svgClipPathFrame
1.71 + */
1.72 + virtual nsIAtom* GetType() const MOZ_OVERRIDE;
1.73 +
1.74 +#ifdef DEBUG_FRAME_DUMP
1.75 + virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
1.76 + {
1.77 + return MakeFrameName(NS_LITERAL_STRING("SVGClipPath"), aResult);
1.78 + }
1.79 +#endif
1.80 +
1.81 + private:
1.82 + // A helper class to allow us to paint clip paths safely. The helper
1.83 + // automatically sets and clears the mInUse flag on the clip path frame
1.84 + // (to prevent nasty reference loops). It's easy to mess this up
1.85 + // and break things, so this helper makes the code far more robust.
1.86 + class MOZ_STACK_CLASS AutoClipPathReferencer
1.87 + {
1.88 + public:
1.89 + AutoClipPathReferencer(nsSVGClipPathFrame *aFrame
1.90 + MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
1.91 + : mFrame(aFrame) {
1.92 + MOZ_GUARD_OBJECT_NOTIFIER_INIT;
1.93 + NS_ASSERTION(!mFrame->mInUse, "reference loop!");
1.94 + mFrame->mInUse = true;
1.95 + }
1.96 + ~AutoClipPathReferencer() {
1.97 + mFrame->mInUse = false;
1.98 + }
1.99 + private:
1.100 + nsSVGClipPathFrame *mFrame;
1.101 + MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
1.102 + };
1.103 +
1.104 + nsIFrame *mClipParent;
1.105 + nsAutoPtr<gfxMatrix> mClipParentMatrix;
1.106 + // recursion prevention flag
1.107 + bool mInUse;
1.108 +
1.109 + // nsSVGContainerFrame methods:
1.110 + virtual gfxMatrix GetCanvasTM(uint32_t aFor,
1.111 + nsIFrame* aTransformRoot = nullptr) MOZ_OVERRIDE;
1.112 +};
1.113 +
1.114 +#endif
