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-rw-r--r--layout/svg/SVGUseFrame.cpp145
1 files changed, 145 insertions, 0 deletions
diff --git a/layout/svg/SVGUseFrame.cpp b/layout/svg/SVGUseFrame.cpp
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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/. */
+
+#include "SVGUseFrame.h"
+
+#include "mozilla/PresShell.h"
+#include "mozilla/SVGObserverUtils.h"
+#include "mozilla/SVGUtils.h"
+#include "mozilla/dom/MutationEvent.h"
+#include "mozilla/dom/SVGUseElement.h"
+#include "nsLayoutUtils.h"
+
+using namespace mozilla::dom;
+
+//----------------------------------------------------------------------
+// Implementation
+
+nsIFrame* NS_NewSVGUseFrame(mozilla::PresShell* aPresShell,
+ mozilla::ComputedStyle* aStyle) {
+ return new (aPresShell)
+ mozilla::SVGUseFrame(aStyle, aPresShell->GetPresContext());
+}
+
+namespace mozilla {
+
+NS_IMPL_FRAMEARENA_HELPERS(SVGUseFrame)
+
+//----------------------------------------------------------------------
+// nsIFrame methods:
+
+void SVGUseFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow) {
+ NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::use),
+ "Content is not an SVG use!");
+
+ mHasValidDimensions =
+ static_cast<SVGUseElement*>(aContent)->HasValidDimensions();
+
+ SVGGFrame::Init(aContent, aParent, aPrevInFlow);
+}
+
+nsresult SVGUseFrame::AttributeChanged(int32_t aNamespaceID, nsAtom* aAttribute,
+ int32_t aModType) {
+ // Currently our SMIL implementation does not modify the DOM attributes. Once
+ // we implement the SVG 2 SMIL behaviour this can be removed
+ // SVGUseElement::AfterSetAttr's implementation will be sufficient.
+ if (aModType == MutationEvent_Binding::SMIL) {
+ auto* content = SVGUseElement::FromNode(GetContent());
+ content->ProcessAttributeChange(aNamespaceID, aAttribute);
+ }
+
+ return SVGGFrame::AttributeChanged(aNamespaceID, aAttribute, aModType);
+}
+
+void SVGUseFrame::DidSetComputedStyle(ComputedStyle* aOldComputedStyle) {
+ SVGGFrame::DidSetComputedStyle(aOldComputedStyle);
+
+ if (!aOldComputedStyle) {
+ return;
+ }
+ const auto* newSVGReset = StyleSVGReset();
+ const auto* oldSVGReset = aOldComputedStyle->StyleSVGReset();
+
+ if (newSVGReset->mX != oldSVGReset->mX ||
+ newSVGReset->mY != oldSVGReset->mY) {
+ // make sure our cached transform matrix gets (lazily) updated
+ mCanvasTM = nullptr;
+ SVGUtils::ScheduleReflowSVG(this);
+ SVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
+ }
+}
+
+void SVGUseFrame::DimensionAttributeChanged(bool aHadValidDimensions,
+ bool aAttributeIsUsed) {
+ bool invalidate = aAttributeIsUsed;
+ if (mHasValidDimensions != aHadValidDimensions) {
+ mHasValidDimensions = !mHasValidDimensions;
+ invalidate = true;
+ }
+
+ if (invalidate) {
+ nsLayoutUtils::PostRestyleEvent(GetContent()->AsElement(), RestyleHint{0},
+ nsChangeHint_InvalidateRenderingObservers);
+ SVGUtils::ScheduleReflowSVG(this);
+ }
+}
+
+void SVGUseFrame::HrefChanged() {
+ nsLayoutUtils::PostRestyleEvent(GetContent()->AsElement(), RestyleHint{0},
+ nsChangeHint_InvalidateRenderingObservers);
+ SVGUtils::ScheduleReflowSVG(this);
+}
+
+//----------------------------------------------------------------------
+// ISVGDisplayableFrame methods
+
+void SVGUseFrame::ReflowSVG() {
+ // We only handle x/y offset here, since any width/height that is in force is
+ // handled by the SVGOuterSVGFrame for the anonymous <svg> that will be
+ // created for that purpose.
+ auto* content = SVGUseElement::FromNode(GetContent());
+ float x = SVGContentUtils::CoordToFloat(content, StyleSVGReset()->mX,
+ SVGContentUtils::X);
+ float y = SVGContentUtils::CoordToFloat(content, StyleSVGReset()->mY,
+ SVGContentUtils::Y);
+ mRect.MoveTo(nsLayoutUtils::RoundGfxRectToAppRect(gfxRect(x, y, 0, 0),
+ AppUnitsPerCSSPixel())
+ .TopLeft());
+
+ // If we have a filter, we need to invalidate ourselves because filter
+ // output can change even if none of our descendants need repainting.
+ if (StyleEffects()->HasFilters()) {
+ InvalidateFrame();
+ }
+
+ SVGGFrame::ReflowSVG();
+}
+
+void SVGUseFrame::NotifySVGChanged(uint32_t aFlags) {
+ if (aFlags & COORD_CONTEXT_CHANGED && !(aFlags & TRANSFORM_CHANGED)) {
+ // Coordinate context changes affect mCanvasTM if we have a
+ // percentage 'x' or 'y'
+ if (StyleSVGReset()->mX.HasPercent() || StyleSVGReset()->mY.HasPercent()) {
+ aFlags |= TRANSFORM_CHANGED;
+ // Ancestor changes can't affect how we render from the perspective of
+ // any rendering observers that we may have, so we don't need to
+ // invalidate them. We also don't need to invalidate ourself, since our
+ // changed ancestor will have invalidated its entire area, which includes
+ // our area.
+ // For perf reasons we call this before calling NotifySVGChanged() below.
+ SVGUtils::ScheduleReflowSVG(this);
+ }
+ }
+
+ // We don't remove the TRANSFORM_CHANGED flag here if we have a viewBox or
+ // non-percentage width/height, since if they're set then they are cloned to
+ // an anonymous child <svg>, and its SVGInnerSVGFrame will do that.
+
+ SVGGFrame::NotifySVGChanged(aFlags);
+}
+
+} // namespace mozilla