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/* -*- 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 "nsContainerFrame.h"
#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;
class SVGFEImageFrame : public nsFrame
{
friend nsIFrame*
NS_NewSVGFEImageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
protected:
explicit SVGFEImageFrame(nsStyleContext* aContext)
: nsFrame(aContext)
{
AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY);
// This frame isn't actually displayed, but it contains an image and we want
// to use the nsImageLoadingContent machinery for managing images, which
// requires visibility tracking, so we enable visibility tracking and
// forcibly mark it visible below.
EnableVisibilityTracking();
}
public:
NS_DECL_FRAMEARENA_HELPERS
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
virtual bool IsFrameOfType(uint32_t aFlags) const override
{
return nsFrame::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));
}
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override
{
return MakeFrameName(NS_LITERAL_STRING("SVGFEImage"), aResult);
}
#endif
/**
* Get the "type" of the frame
*
* @see nsGkAtoms::svgFEImageFrame
*/
virtual nsIAtom* GetType() const override;
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) override;
void OnVisibilityChange(Visibility aNewVisibility,
Maybe<OnNonvisible> aNonvisibleAction = Nothing()) override;
virtual bool ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas) override {
// 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::DestroyFrom(nsIFrame* aDestructRoot)
{
DecApproximateVisibleCount();
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(nsFrame::mContent);
if (imageLoader) {
imageLoader->FrameDestroyed(this);
}
nsFrame::DestroyFrom(aDestructRoot);
}
void
SVGFEImageFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow)
{
NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::feImage),
"Trying to construct an SVGFEImageFrame for a "
"content element that doesn't support the right interfaces");
nsFrame::Init(aContent, aParent, aPrevInFlow);
// We assume that feImage's are always visible.
// This call must happen before the FrameCreated. This is because the
// primary frame pointer on our content node isn't set until after this
// function ends, so there is no way for the resulting OnVisibilityChange
// notification to get a frame. FrameCreated has a workaround for this in
// that it passes our frame around so it can be accessed. OnVisibilityChange
// doesn't have that workaround.
IncApproximateVisibleCount();
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(nsFrame::mContent);
if (imageLoader) {
imageLoader->FrameCreated(this);
}
}
nsIAtom *
SVGFEImageFrame::GetType() const
{
return nsGkAtoms::svgFEImageFrame;
}
nsresult
SVGFEImageFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
SVGFEImageElement *element = static_cast<SVGFEImageElement*>(mContent);
if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) {
MOZ_ASSERT(GetParent()->GetType() == nsGkAtoms::svgFilterFrame,
"Observers observe the filter, so that's what we must invalidate");
nsSVGEffects::InvalidateDirectRenderingObservers(GetParent());
}
if ((aNameSpaceID == kNameSpaceID_XLink ||
aNameSpaceID == kNameSpaceID_None) &&
aAttribute == nsGkAtoms::href) {
bool hrefIsSet =
element->mStringAttributes[SVGFEImageElement::HREF].IsExplicitlySet() ||
element->mStringAttributes[SVGFEImageElement::XLINK_HREF]
.IsExplicitlySet();
if (hrefIsSet) {
element->LoadSVGImage(true, true);
} else {
element->CancelImageRequests(true);
}
}
return nsFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
void
SVGFEImageFrame::OnVisibilityChange(Visibility aNewVisibility,
Maybe<OnNonvisible> aNonvisibleAction)
{
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(nsFrame::mContent);
if (!imageLoader) {
MOZ_ASSERT_UNREACHABLE("Should have an nsIImageLoadingContent");
nsFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
return;
}
imageLoader->OnVisibilityChange(aNewVisibility, aNonvisibleAction);
nsFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
}
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