1 files changed, 196 insertions, 0 deletions
diff --git a/dom/svg/SVGSwitchElement.cpp b/dom/svg/SVGSwitchElement.cpp
new file mode 100644
index 000000000..a0358dc15
--- /dev/null
+++ b/dom/svg/SVGSwitchElement.cpp
@@ -0,0 +1,196 @@
+/* -*- 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 "mozilla/dom/SVGSwitchElement.h"
+
+#include "nsLayoutUtils.h"
+#include "nsSVGUtils.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/dom/SVGSwitchElementBinding.h"
+
+class nsIFrame;
+
+NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(Switch)
+
+namespace mozilla {
+namespace dom {
+
+JSObject*
+SVGSwitchElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return SVGSwitchElementBinding::Wrap(aCx, this, aGivenProto);
+}
+
+//----------------------------------------------------------------------
+// nsISupports methods
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(SVGSwitchElement, SVGSwitchElementBase,
+                                   mActiveChild)
+
+NS_IMPL_ADDREF_INHERITED(SVGSwitchElement,SVGSwitchElementBase)
+NS_IMPL_RELEASE_INHERITED(SVGSwitchElement,SVGSwitchElementBase)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(SVGSwitchElement)
+NS_INTERFACE_MAP_END_INHERITING(SVGSwitchElementBase)
+
+//----------------------------------------------------------------------
+// Implementation
+
+SVGSwitchElement::SVGSwitchElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
+  : SVGSwitchElementBase(aNodeInfo)
+{
+}
+
+SVGSwitchElement::~SVGSwitchElement()
+{
+}
+
+void
+SVGSwitchElement::MaybeInvalidate()
+{
+  // We must not change mActiveChild until after
+  // InvalidateAndScheduleBoundsUpdate has been called, otherwise
+  // it will not correctly invalidate the old mActiveChild area.
+
+  nsIContent *newActiveChild = FindActiveChild();
+
+  if (newActiveChild == mActiveChild) {
+    return;
+  }
+
+  nsIFrame *frame = GetPrimaryFrame();
+  if (frame) {
+    nsLayoutUtils::PostRestyleEvent(
+      this, nsRestyleHint(0),
+      nsChangeHint_InvalidateRenderingObservers);
+    nsSVGUtils::ScheduleReflowSVG(frame);
+  }
+
+  mActiveChild = newActiveChild;
+}
+
+//----------------------------------------------------------------------
+// nsIDOMNode methods
+
+
+NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGSwitchElement)
+
+//----------------------------------------------------------------------
+// nsINode methods
+
+nsresult
+SVGSwitchElement::InsertChildAt(nsIContent* aKid,
+                                uint32_t aIndex,
+                                bool aNotify)
+{
+  nsresult rv = SVGSwitchElementBase::InsertChildAt(aKid, aIndex, aNotify);
+  if (NS_SUCCEEDED(rv)) {
+    MaybeInvalidate();
+  }
+  return rv;
+}
+
+void
+SVGSwitchElement::RemoveChildAt(uint32_t aIndex, bool aNotify)
+{
+  SVGSwitchElementBase::RemoveChildAt(aIndex, aNotify);
+  MaybeInvalidate();
+}
+
+//----------------------------------------------------------------------
+// nsIContent methods
+
+NS_IMETHODIMP_(bool)
+SVGSwitchElement::IsAttributeMapped(const nsIAtom* name) const
+{
+  static const MappedAttributeEntry* const map[] = {
+    sFEFloodMap,
+    sFiltersMap,
+    sFontSpecificationMap,
+    sGradientStopMap,
+    sLightingEffectsMap,
+    sMarkersMap,
+    sTextContentElementsMap,
+    sViewportsMap
+  };
+
+  return FindAttributeDependence(name, map) ||
+    SVGSwitchElementBase::IsAttributeMapped(name);
+}
+
+//----------------------------------------------------------------------
+// Implementation Helpers:
+
+nsIContent *
+SVGSwitchElement::FindActiveChild() const
+{
+  const nsAdoptingString& acceptLangs =
+    Preferences::GetLocalizedString("intl.accept_languages");
+
+  if (!acceptLangs.IsEmpty()) {
+    int32_t bestLanguagePreferenceRank = -1;
+    nsIContent *bestChild = nullptr;
+    nsIContent *defaultChild = nullptr;
+    for (nsIContent* child = nsINode::GetFirstChild();
+         child;
+         child = child->GetNextSibling()) {
+
+      if (!child->IsElement()) {
+        continue;
+      }
+      nsCOMPtr<SVGTests> tests(do_QueryInterface(child));
+      if (tests) {
+        if (tests->PassesConditionalProcessingTests(
+                            SVGTests::kIgnoreSystemLanguage)) {
+          int32_t languagePreferenceRank =
+              tests->GetBestLanguagePreferenceRank(acceptLangs);
+          switch (languagePreferenceRank) {
+          case 0:
+            // best possible match
+            return child;
+          case -1:
+            // no match
+            break;
+          case -2:
+            // no systemLanguage attribute. If there's nothing better
+            // we'll use the first such child.
+            if (!defaultChild) {
+              defaultChild = child;
+            }
+            break;
+          default:
+            if (bestLanguagePreferenceRank == -1 ||
+                languagePreferenceRank < bestLanguagePreferenceRank) {
+              bestLanguagePreferenceRank = languagePreferenceRank;
+              bestChild = child;
+            }
+            break;
+          }
+        }
+      } else if (!bestChild) {
+         bestChild = child;
+      }
+    }
+    return bestChild ? bestChild : defaultChild;
+  }
+
+  for (nsIContent* child = nsINode::GetFirstChild();
+       child;
+       child = child->GetNextSibling()) {
+    if (!child->IsElement()) {
+      continue;
+    }
+    nsCOMPtr<SVGTests> tests(do_QueryInterface(child));
+    if (!tests || tests->PassesConditionalProcessingTests(&acceptLangs)) {
+      return child;
+    }
+  }
+  return nullptr;
+}
+
+} // namespace dom
+} // namespace mozilla
+