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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /layout/svg/SVGFEImageFrame.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'layout/svg/SVGFEImageFrame.cpp')
-rw-r--r--layout/svg/SVGFEImageFrame.cpp168
1 files changed, 168 insertions, 0 deletions
diff --git a/layout/svg/SVGFEImageFrame.cpp b/layout/svg/SVGFEImageFrame.cpp
new file mode 100644
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+++ b/layout/svg/SVGFEImageFrame.cpp
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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.
+ 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);
+}