mirror of
https://github.com/classilla/tenfourfox.git
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199 lines
5.4 KiB
C++
199 lines
5.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/SVGSwitchElement.h"
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#include "nsLayoutUtils.h"
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#include "nsSVGUtils.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/dom/SVGSwitchElementBinding.h"
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class nsIFrame;
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NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(Switch)
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namespace mozilla {
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namespace dom {
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JSObject*
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SVGSwitchElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return SVGSwitchElementBinding::Wrap(aCx, this, aGivenProto);
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}
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//----------------------------------------------------------------------
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// nsISupports methods
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NS_IMPL_CYCLE_COLLECTION_INHERITED(SVGSwitchElement, SVGSwitchElementBase,
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mActiveChild)
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NS_IMPL_ADDREF_INHERITED(SVGSwitchElement,SVGSwitchElementBase)
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NS_IMPL_RELEASE_INHERITED(SVGSwitchElement,SVGSwitchElementBase)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(SVGSwitchElement)
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NS_INTERFACE_MAP_END_INHERITING(SVGSwitchElementBase)
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//----------------------------------------------------------------------
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// Implementation
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SVGSwitchElement::SVGSwitchElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: SVGSwitchElementBase(aNodeInfo)
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{
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}
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SVGSwitchElement::~SVGSwitchElement()
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{
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}
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void
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SVGSwitchElement::MaybeInvalidate()
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{
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// We must not change mActiveChild until after
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// InvalidateAndScheduleBoundsUpdate has been called, otherwise
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// it will not correctly invalidate the old mActiveChild area.
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nsIContent *newActiveChild = FindActiveChild();
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if (newActiveChild == mActiveChild) {
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return;
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}
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nsIFrame *frame = GetPrimaryFrame();
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if (frame) {
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nsLayoutUtils::PostRestyleEvent(
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this, nsRestyleHint(0),
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nsChangeHint_InvalidateRenderingObservers);
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nsSVGUtils::ScheduleReflowSVG(frame);
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}
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mActiveChild = newActiveChild;
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}
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//----------------------------------------------------------------------
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// nsIDOMNode methods
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NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGSwitchElement)
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//----------------------------------------------------------------------
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// nsINode methods
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nsresult
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SVGSwitchElement::InsertChildAt(nsIContent* aKid,
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uint32_t aIndex,
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bool aNotify)
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{
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nsresult rv = SVGSwitchElementBase::InsertChildAt(aKid, aIndex, aNotify);
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if (NS_SUCCEEDED(rv)) {
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MaybeInvalidate();
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}
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return rv;
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}
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void
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SVGSwitchElement::RemoveChildAt(uint32_t aIndex, bool aNotify)
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{
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SVGSwitchElementBase::RemoveChildAt(aIndex, aNotify);
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MaybeInvalidate();
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}
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//----------------------------------------------------------------------
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// nsIContent methods
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NS_IMETHODIMP_(bool)
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SVGSwitchElement::IsAttributeMapped(const nsIAtom* name) const
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{
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static const MappedAttributeEntry* const map[] = {
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sFEFloodMap,
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sFiltersMap,
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sFontSpecificationMap,
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sGradientStopMap,
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sLightingEffectsMap,
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sMarkersMap,
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sTextContentElementsMap,
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sViewportsMap
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};
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return FindAttributeDependence(name, map) ||
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SVGSwitchElementBase::IsAttributeMapped(name);
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}
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//----------------------------------------------------------------------
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// Implementation Helpers:
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nsIContent *
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SVGSwitchElement::FindActiveChild() const
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{
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bool allowReorder = AttrValueIs(kNameSpaceID_None,
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nsGkAtoms::allowReorder,
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nsGkAtoms::yes, eCaseMatters);
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const nsAdoptingString& acceptLangs =
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Preferences::GetLocalizedString("intl.accept_languages");
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if (allowReorder && !acceptLangs.IsEmpty()) {
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int32_t bestLanguagePreferenceRank = -1;
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nsIContent *bestChild = nullptr;
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nsIContent *defaultChild = nullptr;
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for (nsIContent* child = nsINode::GetFirstChild();
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child;
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child = child->GetNextSibling()) {
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if (!child->IsElement()) {
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continue;
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}
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nsCOMPtr<SVGTests> tests(do_QueryInterface(child));
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if (tests) {
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if (tests->PassesConditionalProcessingTests(
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SVGTests::kIgnoreSystemLanguage)) {
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int32_t languagePreferenceRank =
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tests->GetBestLanguagePreferenceRank(acceptLangs);
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switch (languagePreferenceRank) {
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case 0:
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// best possible match
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return child;
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case -1:
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// no match
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break;
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case -2:
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// no systemLanguage attribute. If there's nothing better
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// we'll use the last such child.
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defaultChild = child;
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break;
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default:
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if (bestLanguagePreferenceRank == -1 ||
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languagePreferenceRank < bestLanguagePreferenceRank) {
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bestLanguagePreferenceRank = languagePreferenceRank;
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bestChild = child;
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}
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break;
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}
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}
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} else if (!bestChild) {
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bestChild = child;
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}
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}
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return bestChild ? bestChild : defaultChild;
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}
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for (nsIContent* child = nsINode::GetFirstChild();
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child;
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child = child->GetNextSibling()) {
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if (!child->IsElement()) {
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continue;
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}
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nsCOMPtr<SVGTests> tests(do_QueryInterface(child));
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if (!tests || tests->PassesConditionalProcessingTests(&acceptLangs)) {
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return child;
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}
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}
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return nullptr;
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}
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} // namespace dom
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} // namespace mozilla
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