summaryrefslogtreecommitdiffstats
path: root/layout/svg/nsSVGStopFrame.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'layout/svg/nsSVGStopFrame.cpp')
-rw-r--r--layout/svg/nsSVGStopFrame.cpp116
1 files changed, 116 insertions, 0 deletions
diff --git a/layout/svg/nsSVGStopFrame.cpp b/layout/svg/nsSVGStopFrame.cpp
new file mode 100644
index 000000000..1b75fa102
--- /dev/null
+++ b/layout/svg/nsSVGStopFrame.cpp
@@ -0,0 +1,116 @@
+/* -*- 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 "nsFrame.h"
+#include "nsGkAtoms.h"
+#include "nsStyleContext.h"
+#include "nsSVGEffects.h"
+
+// This is a very simple frame whose only purpose is to capture style change
+// events and propagate them to the parent. Most of the heavy lifting is done
+// within the nsSVGGradientFrame, which is the parent for this frame
+
+class nsSVGStopFrame : public nsFrame
+{
+ friend nsIFrame*
+ NS_NewSVGStopFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
+protected:
+ explicit nsSVGStopFrame(nsStyleContext* aContext)
+ : nsFrame(aContext)
+ {
+ AddStateBits(NS_FRAME_IS_NONDISPLAY);
+ }
+
+public:
+ NS_DECL_FRAMEARENA_HELPERS
+
+ // nsIFrame interface:
+#ifdef DEBUG
+ virtual void Init(nsIContent* aContent,
+ nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow) override;
+#endif
+
+ void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+ const nsRect& aDirtyRect,
+ const nsDisplayListSet& aLists) override {}
+
+ virtual nsresult AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType) override;
+
+ /**
+ * Get the "type" of the frame
+ *
+ * @see nsGkAtoms::svgStopFrame
+ */
+ virtual nsIAtom* GetType() const 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("SVGStop"), aResult);
+ }
+#endif
+};
+
+//----------------------------------------------------------------------
+// Implementation
+
+NS_IMPL_FRAMEARENA_HELPERS(nsSVGStopFrame)
+
+//----------------------------------------------------------------------
+// nsIFrame methods:
+
+#ifdef DEBUG
+void
+nsSVGStopFrame::Init(nsIContent* aContent,
+ nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow)
+{
+ NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::stop), "Content is not a stop element");
+
+ nsFrame::Init(aContent, aParent, aPrevInFlow);
+}
+#endif /* DEBUG */
+
+nsIAtom *
+nsSVGStopFrame::GetType() const
+{
+ return nsGkAtoms::svgStopFrame;
+}
+
+nsresult
+nsSVGStopFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType)
+{
+ if (aNameSpaceID == kNameSpaceID_None &&
+ aAttribute == nsGkAtoms::offset) {
+ MOZ_ASSERT(GetParent()->GetType() == nsGkAtoms::svgLinearGradientFrame ||
+ GetParent()->GetType() == nsGkAtoms::svgRadialGradientFrame,
+ "Observers observe the gradient, so that's what we must invalidate");
+ nsSVGEffects::InvalidateDirectRenderingObservers(GetParent());
+ }
+
+ return nsFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
+}
+
+// -------------------------------------------------------------------------
+// Public functions
+// -------------------------------------------------------------------------
+
+nsIFrame* NS_NewSVGStopFrame(nsIPresShell* aPresShell,
+ nsStyleContext* aContext)
+{
+ return new (aPresShell) nsSVGStopFrame(aContext);
+}