154 lines
5.5 KiB
C++
154 lines
5.5 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_SVGCONTAINERFRAME_H
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#define NS_SVGCONTAINERFRAME_H
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#include "mozilla/Attributes.h"
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#include "nsContainerFrame.h"
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#include "nsFrame.h"
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#include "nsIFrame.h"
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#include "nsISVGChildFrame.h"
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#include "nsQueryFrame.h"
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#include "nsRect.h"
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#include "nsSVGUtils.h"
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class gfxContext;
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class nsFrameList;
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class nsIContent;
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class nsIPresShell;
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class nsStyleContext;
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struct nsRect;
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/**
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* Base class for SVG container frames. Frame sub-classes that do not
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* display their contents directly (such as the frames for <marker> or
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* <pattern>) just inherit this class. Frame sub-classes that do or can
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* display their contents directly (such as the frames for inner-<svg> or
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* <g>) inherit our nsDisplayContainerFrame sub-class.
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*
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* *** WARNING ***
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*
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* Do *not* blindly cast to SVG element types in this class's methods (see the
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* warning comment for nsSVGDisplayContainerFrame below).
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*/
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class nsSVGContainerFrame : public nsContainerFrame
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{
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friend nsIFrame* NS_NewSVGContainerFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext);
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protected:
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explicit nsSVGContainerFrame(nsStyleContext* aContext)
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: nsContainerFrame(aContext)
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{
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AddStateBits(NS_FRAME_SVG_LAYOUT);
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}
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public:
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NS_DECL_QUERYFRAME_TARGET(nsSVGContainerFrame)
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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// Returns the transform to our gfxContext (to device pixels, not CSS px)
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virtual gfxMatrix GetCanvasTM() {
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return gfxMatrix();
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}
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/**
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* Returns true if the frame's content has a transform that applies only to
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* its children, and not to the frame itself. For example, an implicit
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* transform introduced by a 'viewBox' attribute, or an explicit transform
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* due to a root-<svg> having its currentScale/currentTransform properties
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* set. If aTransform is non-null, then it will be set to the transform.
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*/
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virtual bool HasChildrenOnlyTransform(Matrix *aTransform) const {
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return false;
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}
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// nsIFrame:
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virtual void AppendFrames(ChildListID aListID,
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nsFrameList& aFrameList) override;
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virtual void InsertFrames(ChildListID aListID,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList) override;
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virtual void RemoveFrame(ChildListID aListID,
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nsIFrame* aOldFrame) override;
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virtual bool IsFrameOfType(uint32_t aFlags) const override
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{
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return nsContainerFrame::IsFrameOfType(
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aFlags & ~(nsIFrame::eSVG | nsIFrame::eSVGContainer));
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}
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override {}
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virtual bool ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas) override;
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protected:
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/**
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* Traverses a frame tree, marking any SVGTextFrame frames as dirty
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* and calling InvalidateRenderingObservers() on it.
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*/
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static void ReflowSVGNonDisplayText(nsIFrame* aContainer);
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};
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/**
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* Frame class or base-class for SVG containers that can or do display their
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* contents directly.
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*
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* *** WARNING ***
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*
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* This class's methods can *not* assume that mContent points to an instance of
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* an SVG element class since this class is inherited by
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* nsSVGGenericContainerFrame which is used for unrecognized elements in the
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* SVG namespace. Do *not* blindly cast to SVG element types.
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*/
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class nsSVGDisplayContainerFrame : public nsSVGContainerFrame,
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public nsISVGChildFrame
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{
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protected:
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explicit nsSVGDisplayContainerFrame(nsStyleContext* aContext)
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: nsSVGContainerFrame(aContext)
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{
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AddStateBits(NS_FRAME_MAY_BE_TRANSFORMED);
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}
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public:
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NS_DECL_QUERYFRAME_TARGET(nsSVGDisplayContainerFrame)
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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// nsIFrame:
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virtual void InsertFrames(ChildListID aListID,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList) override;
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virtual void RemoveFrame(ChildListID aListID,
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nsIFrame* aOldFrame) 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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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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virtual bool IsSVGTransformed(Matrix *aOwnTransform = nullptr,
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Matrix *aFromParentTransform = nullptr) const override;
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// nsISVGChildFrame interface:
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virtual DrawResult PaintSVG(gfxContext& aContext,
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const gfxMatrix& aTransform,
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const nsIntRect *aDirtyRect = nullptr) override;
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virtual nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) override;
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virtual nsRect GetCoveredRegion() override;
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virtual void ReflowSVG() override;
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virtual void NotifySVGChanged(uint32_t aFlags) override;
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virtual SVGBBox GetBBoxContribution(const Matrix &aToBBoxUserspace,
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uint32_t aFlags) override;
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virtual bool IsDisplayContainer() override { return true; }
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};
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#endif
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