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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef LAYOUT_SVG_SVGCONTAINERFRAME_H_
#define LAYOUT_SVG_SVGCONTAINERFRAME_H_
#include "mozilla/Attributes.h"
#include "mozilla/ISVGDisplayableFrame.h"
#include "mozilla/UniquePtr.h"
#include "nsContainerFrame.h"
#include "nsIFrame.h"
#include "nsQueryFrame.h"
#include "nsRect.h"
class gfxContext;
class nsFrameList;
class nsIContent;
struct nsRect;
namespace mozilla {
class PresShell;
} // namespace mozilla
nsIFrame* NS_NewSVGContainerFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle);
namespace mozilla {
/**
* Base class for SVG container frames. Frame sub-classes that do not
* display their contents directly (such as the frames for <marker> or
* <pattern>) just inherit this class. Frame sub-classes that do or can
* display their contents directly (such as the frames for inner-<svg> or
* <g>) inherit our SVGDisplayContainerFrame sub-class.
*
* *** WARNING ***
*
* Do *not* blindly cast to SVG element types in this class's methods (see the
* warning comment for SVGDisplayContainerFrame below).
*/
class SVGContainerFrame : public nsContainerFrame {
friend nsIFrame* ::NS_NewSVGContainerFrame(mozilla::PresShell* aPresShell,
ComputedStyle* aStyle);
protected:
SVGContainerFrame(ComputedStyle* aStyle, nsPresContext* aPresContext,
ClassID aID)
: nsContainerFrame(aStyle, aPresContext, aID) {
AddStateBits(NS_FRAME_SVG_LAYOUT);
}
public:
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS(SVGContainerFrame)
// Returns the transform to our gfxContext (to device pixels, not CSS px)
virtual gfxMatrix GetCanvasTM() { return gfxMatrix(); }
/**
* Returns true if the frame's content has a transform that applies only to
* its children, and not to the frame itself. For example, an implicit
* transform introduced by a 'viewBox' attribute, or an explicit transform
* due to a root-<svg> having its currentScale/currentTransform properties
* set. If aTransform is non-null, then it will be set to the transform.
*/
virtual bool HasChildrenOnlyTransform(Matrix* aTransform) const {
return false;
}
// nsIFrame:
void AppendFrames(ChildListID aListID, nsFrameList&& aFrameList) override;
void InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
const nsLineList::iterator* aPrevFrameLine,
nsFrameList&& aFrameList) override;
void RemoveFrame(DestroyContext&, ChildListID, nsIFrame*) override;
bool IsFrameOfType(uint32_t aFlags) const override {
if (aFlags & eSupportsContainLayoutAndPaint) {
return false;
}
return nsContainerFrame::IsFrameOfType(
aFlags & ~(nsIFrame::eSVG | nsIFrame::eSVGContainer));
}
void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override {}
bool ComputeCustomOverflow(mozilla::OverflowAreas& aOverflowAreas) override;
protected:
/**
* Traverses a frame tree, marking any SVGTextFrame frames as dirty
* and calling InvalidateRenderingObservers() on it.
*/
static void ReflowSVGNonDisplayText(nsIFrame* aContainer);
};
/**
* Frame class or base-class for SVG containers that can or do display their
* contents directly.
*
* *** WARNING ***
*
* This class's methods can *not* assume that mContent points to an instance of
* an SVG element class since this class is inherited by
* SVGGenericContainerFrame which is used for unrecognized elements in the
* SVG namespace. Do *not* blindly cast to SVG element types.
*/
class SVGDisplayContainerFrame : public SVGContainerFrame,
public ISVGDisplayableFrame {
protected:
SVGDisplayContainerFrame(ComputedStyle* aStyle, nsPresContext* aPresContext,
nsIFrame::ClassID aID)
: SVGContainerFrame(aStyle, aPresContext, aID) {
AddStateBits(NS_FRAME_MAY_BE_TRANSFORMED);
}
public:
NS_DECL_QUERYFRAME
NS_DECL_QUERYFRAME_TARGET(SVGDisplayContainerFrame)
NS_DECL_ABSTRACT_FRAME(SVGDisplayContainerFrame)
// nsIFrame:
void InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
const nsLineList::iterator* aPrevFrameLine,
nsFrameList&& aFrameList) override;
void RemoveFrame(DestroyContext&, ChildListID, nsIFrame*) override;
void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override;
bool IsSVGTransformed(Matrix* aOwnTransform = nullptr,
Matrix* aFromParentTransform = nullptr) const override;
// ISVGDisplayableFrame interface:
void PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform,
imgDrawingParams& aImgParams) override;
nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) override;
void ReflowSVG() override;
void NotifySVGChanged(uint32_t aFlags) override;
SVGBBox GetBBoxContribution(const Matrix& aToBBoxUserspace,
uint32_t aFlags) override;
bool IsDisplayContainer() override { return true; }
gfxMatrix GetCanvasTM() override;
protected:
/**
* Cached canvasTM value.
*/
UniquePtr<gfxMatrix> mCanvasTM;
};
} // namespace mozilla
#endif // LAYOUT_SVG_SVGCONTAINERFRAME_H_
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