Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 172 insertions, 0 deletions

diff --git a/layout/svg/SVGFilterFrame.cpp b/layout/svg/SVGFilterFrame.cpp
new file mode 100644
index 0000000000..0b4544a36c
--- /dev/null
+++ b/layout/svg/SVGFilterFrame.cpp
@@ -0,0 +1,172 @@
+/* -*- 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/. */
+
+// Main header first:
+#include "SVGFilterFrame.h"
+
+// Keep others in (case-insensitive) order:
+#include "AutoReferenceChainGuard.h"
+#include "gfxUtils.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/dom/SVGFilterElement.h"
+#include "nsGkAtoms.h"
+#include "SVGObserverUtils.h"
+#include "SVGElement.h"
+#include "SVGFilterInstance.h"
+#include "nsContentUtils.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsIFrame* NS_NewSVGFilterFrame(mozilla::PresShell* aPresShell,
+                               mozilla::ComputedStyle* aStyle) {
+  return new (aPresShell)
+      mozilla::SVGFilterFrame(aStyle, aPresShell->GetPresContext());
+}
+
+namespace mozilla {
+
+NS_IMPL_FRAMEARENA_HELPERS(SVGFilterFrame)
+
+uint16_t SVGFilterFrame::GetEnumValue(uint32_t aIndex, nsIContent* aDefault) {
+  SVGAnimatedEnumeration& thisEnum =
+      static_cast<SVGFilterElement*>(GetContent())->mEnumAttributes[aIndex];
+
+  if (thisEnum.IsExplicitlySet()) {
+    return thisEnum.GetAnimValue();
+  }
+
+  // Before we recurse, make sure we'll break reference loops and over long
+  // reference chains:
+  static int16_t sRefChainLengthCounter = AutoReferenceChainGuard::noChain;
+  AutoReferenceChainGuard refChainGuard(this, &mLoopFlag,
+                                        &sRefChainLengthCounter);
+  if (MOZ_UNLIKELY(!refChainGuard.Reference())) {
+    // Break reference chain
+    return static_cast<SVGFilterElement*>(aDefault)
+        ->mEnumAttributes[aIndex]
+        .GetAnimValue();
+  }
+
+  SVGFilterFrame* next = GetReferencedFilter();
+
+  return next ? next->GetEnumValue(aIndex, aDefault)
+              : static_cast<SVGFilterElement*>(aDefault)
+                    ->mEnumAttributes[aIndex]
+                    .GetAnimValue();
+}
+
+const SVGAnimatedLength* SVGFilterFrame::GetLengthValue(uint32_t aIndex,
+                                                        nsIContent* aDefault) {
+  const SVGAnimatedLength* thisLength =
+      &static_cast<SVGFilterElement*>(GetContent())->mLengthAttributes[aIndex];
+
+  if (thisLength->IsExplicitlySet()) {
+    return thisLength;
+  }
+
+  // Before we recurse, make sure we'll break reference loops and over long
+  // reference chains:
+  static int16_t sRefChainLengthCounter = AutoReferenceChainGuard::noChain;
+  AutoReferenceChainGuard refChainGuard(this, &mLoopFlag,
+                                        &sRefChainLengthCounter);
+  if (MOZ_UNLIKELY(!refChainGuard.Reference())) {
+    // Break reference chain
+    return &static_cast<SVGFilterElement*>(aDefault)->mLengthAttributes[aIndex];
+  }
+
+  SVGFilterFrame* next = GetReferencedFilter();
+
+  return next ? next->GetLengthValue(aIndex, aDefault)
+              : &static_cast<SVGFilterElement*>(aDefault)
+                     ->mLengthAttributes[aIndex];
+}
+
+const SVGFilterElement* SVGFilterFrame::GetFilterContent(nsIContent* aDefault) {
+  for (nsIContent* child = mContent->GetFirstChild(); child;
+       child = child->GetNextSibling()) {
+    if (child->IsSVGFilterPrimitiveElement()) {
+      return static_cast<SVGFilterElement*>(GetContent());
+    }
+  }
+
+  // Before we recurse, make sure we'll break reference loops and over long
+  // reference chains:
+  static int16_t sRefChainLengthCounter = AutoReferenceChainGuard::noChain;
+  AutoReferenceChainGuard refChainGuard(this, &mLoopFlag,
+                                        &sRefChainLengthCounter);
+  if (MOZ_UNLIKELY(!refChainGuard.Reference())) {
+    // Break reference chain
+    return static_cast<SVGFilterElement*>(aDefault);
+  }
+
+  SVGFilterFrame* next = GetReferencedFilter();
+
+  return next ? next->GetFilterContent(aDefault)
+              : static_cast<SVGFilterElement*>(aDefault);
+}
+
+SVGFilterFrame* SVGFilterFrame::GetReferencedFilter() {
+  if (mNoHRefURI) {
+    return nullptr;
+  }
+
+  auto GetHref = [this](nsAString& aHref) {
+    SVGFilterElement* filter = static_cast<SVGFilterElement*>(GetContent());
+    if (filter->mStringAttributes[SVGFilterElement::HREF].IsExplicitlySet()) {
+      filter->mStringAttributes[SVGFilterElement::HREF].GetAnimValue(aHref,
+                                                                     filter);
+    } else {
+      filter->mStringAttributes[SVGFilterElement::XLINK_HREF].GetAnimValue(
+          aHref, filter);
+    }
+    this->mNoHRefURI = aHref.IsEmpty();
+  };
+
+  nsIFrame* tframe = SVGObserverUtils::GetAndObserveTemplate(this, GetHref);
+  if (tframe && tframe->IsSVGFilterFrame()) {
+    return static_cast<SVGFilterFrame*>(tframe);
+  }
+  // We don't call SVGObserverUtils::RemoveTemplateObserver and set
+  // `mNoHRefURI = false` here since we want to be invalidated if the ID
+  // specified by our href starts resolving to a different/valid element.
+
+  return nullptr;
+}
+
+nsresult SVGFilterFrame::AttributeChanged(int32_t aNameSpaceID,
+                                          nsAtom* aAttribute,
+                                          int32_t aModType) {
+  if (aNameSpaceID == kNameSpaceID_None &&
+      (aAttribute == nsGkAtoms::x || aAttribute == nsGkAtoms::y ||
+       aAttribute == nsGkAtoms::width || aAttribute == nsGkAtoms::height ||
+       aAttribute == nsGkAtoms::filterUnits ||
+       aAttribute == nsGkAtoms::primitiveUnits)) {
+    SVGObserverUtils::InvalidateRenderingObservers(this);
+  } else if ((aNameSpaceID == kNameSpaceID_XLink ||
+              aNameSpaceID == kNameSpaceID_None) &&
+             aAttribute == nsGkAtoms::href) {
+    // Blow away our reference, if any
+    SVGObserverUtils::RemoveTemplateObserver(this);
+    mNoHRefURI = false;
+    // And update whoever references us
+    SVGObserverUtils::InvalidateRenderingObservers(this);
+  }
+  return SVGContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
+                                             aModType);
+}
+
+#ifdef DEBUG
+void SVGFilterFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
+                          nsIFrame* aPrevInFlow) {
+  NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::filter),
+               "Content is not an SVG filter");
+
+  SVGContainerFrame::Init(aContent, aParent, aPrevInFlow);
+}
+#endif /* DEBUG */
+
+}  // namespace mozilla