gecko-dev/layout/svg/SVGFEImageFrame.cpp

154 строки
4.3 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
// Keep in (case-insensitive) order:
#include "nsContentUtils.h"
#include "nsFrame.h"
#include "nsGkAtoms.h"
#include "nsLiteralString.h"
#include "nsSVGEffects.h"
#include "nsSVGFilters.h"
#include "mozilla/dom/SVGFEImageElement.h"
using namespace mozilla;
using namespace mozilla::dom;
typedef nsFrame SVGFEImageFrameBase;
class SVGFEImageFrame : public SVGFEImageFrameBase
{
friend nsIFrame*
NS_NewSVGFEImageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
protected:
SVGFEImageFrame(nsStyleContext* aContext)
: SVGFEImageFrameBase(aContext)
{
AddStateBits(NS_FRAME_SVG_LAYOUT | NS_STATE_SVG_NONDISPLAY_CHILD);
}
public:
NS_DECL_FRAMEARENA_HELPERS
virtual void Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
virtual void DestroyFrom(nsIFrame* aDestructRoot);
virtual bool IsFrameOfType(uint32_t aFlags) const
{
return SVGFEImageFrameBase::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));
}
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("SVGFEImage"), aResult);
}
#endif
virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext);
/**
* Get the "type" of the frame
*
* @see nsGkAtoms::svgFEImageFrame
*/
virtual nsIAtom* GetType() const;
NS_IMETHOD AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType);
virtual bool UpdateOverflow() {
// We don't maintain a visual overflow rect
return false;
}
};
nsIFrame*
NS_NewSVGFEImageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) SVGFEImageFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(SVGFEImageFrame)
/* virtual */ void
SVGFEImageFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext)
{
SVGFEImageFrameBase::DidSetStyleContext(aOldStyleContext);
nsSVGEffects::InvalidateRenderingObservers(this);
}
/* virtual */ void
SVGFEImageFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(SVGFEImageFrameBase::mContent);
if (imageLoader) {
imageLoader->FrameDestroyed(this);
imageLoader->DecrementVisibleCount();
}
SVGFEImageFrameBase::DestroyFrom(aDestructRoot);
}
void
SVGFEImageFrame::Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow)
{
NS_ASSERTION(aContent->IsSVG(nsGkAtoms::feImage),
"Trying to construct an SVGFEImageFrame for a "
"content element that doesn't support the right interfaces");
SVGFEImageFrameBase::Init(aContent, aParent, aPrevInFlow);
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(SVGFEImageFrameBase::mContent);
if (imageLoader) {
// We assume that feImage's are always visible.
// Increment the visible count before calling FrameCreated so that
// FrameCreated will actually track the image correctly.
imageLoader->IncrementVisibleCount();
imageLoader->FrameCreated(this);
}
}
nsIAtom *
SVGFEImageFrame::GetType() const
{
return nsGkAtoms::svgFEImageFrame;
}
NS_IMETHODIMP
SVGFEImageFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
SVGFEImageElement *element = static_cast<SVGFEImageElement*>(mContent);
if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) {
nsSVGEffects::InvalidateRenderingObservers(this);
}
if (aNameSpaceID == kNameSpaceID_XLink &&
aAttribute == nsGkAtoms::href) {
// Prevent setting image.src by exiting early
if (nsContentUtils::IsImageSrcSetDisabled()) {
return NS_OK;
}
if (element->mStringAttributes[SVGFEImageElement::HREF].IsExplicitlySet()) {
element->LoadSVGImage(true, true);
} else {
element->CancelImageRequests(true);
}
}
return SVGFEImageFrameBase::AttributeChanged(aNameSpaceID,
aAttribute, aModType);
}