forked from mirrors/gecko-dev
1b0cba9367
It would be convenient to get nsPresContext from nsIDocument. MozReview-Commit-ID: Ei6V3UE8XGr --HG-- extra : rebase_source : 8d2a917eb62cf341e4e1810451fd01c01dbc3bad
362 lines
9.8 KiB
C++
362 lines
9.8 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/SVGAElement.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/dom/SVGAElementBinding.h"
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#include "nsCOMPtr.h"
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#include "nsContentUtils.h"
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#include "nsGkAtoms.h"
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#include "nsSVGString.h"
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#include "nsIURI.h"
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NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(A)
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namespace mozilla {
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namespace dom {
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JSObject*
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SVGAElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return SVGAElementBinding::Wrap(aCx, this, aGivenProto);
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}
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nsSVGElement::StringInfo SVGAElement::sStringInfo[3] =
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{
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{ &nsGkAtoms::href, kNameSpaceID_None, true },
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{ &nsGkAtoms::href, kNameSpaceID_XLink, true },
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{ &nsGkAtoms::target, kNameSpaceID_None, true }
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};
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//----------------------------------------------------------------------
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// nsISupports methods
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NS_INTERFACE_MAP_BEGIN(SVGAElement)
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NS_INTERFACE_MAP_ENTRY(nsIDOMNode)
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NS_INTERFACE_MAP_ENTRY(nsIDOMElement)
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NS_INTERFACE_MAP_ENTRY(Link)
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NS_INTERFACE_MAP_END_INHERITING(SVGAElementBase)
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NS_IMPL_ADDREF_INHERITED(SVGAElement, SVGAElementBase)
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NS_IMPL_RELEASE_INHERITED(SVGAElement, SVGAElementBase)
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//----------------------------------------------------------------------
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// Implementation
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SVGAElement::SVGAElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: SVGAElementBase(aNodeInfo)
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, Link(this)
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{
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}
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SVGAElement::~SVGAElement()
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{
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}
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already_AddRefed<SVGAnimatedString>
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SVGAElement::Href()
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{
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return mStringAttributes[HREF].IsExplicitlySet()
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? mStringAttributes[HREF].ToDOMAnimatedString(this)
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: mStringAttributes[XLINK_HREF].ToDOMAnimatedString(this);
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}
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//----------------------------------------------------------------------
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// Link methods
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bool
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SVGAElement::ElementHasHref() const
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{
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return mStringAttributes[HREF].IsExplicitlySet() ||
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mStringAttributes[XLINK_HREF].IsExplicitlySet();
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}
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//----------------------------------------------------------------------
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// nsINode methods
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nsresult
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SVGAElement::GetEventTargetParent(EventChainPreVisitor& aVisitor)
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{
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nsresult rv = Element::GetEventTargetParent(aVisitor);
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NS_ENSURE_SUCCESS(rv, rv);
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return GetEventTargetParentForLinks(aVisitor);
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}
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nsresult
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SVGAElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
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{
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return PostHandleEventForLinks(aVisitor);
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}
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NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGAElement)
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//----------------------------------------------------------------------
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already_AddRefed<SVGAnimatedString>
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SVGAElement::Target()
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{
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return mStringAttributes[TARGET].ToDOMAnimatedString(this);
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}
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void
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SVGAElement::GetDownload(nsAString & aDownload)
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{
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GetAttr(kNameSpaceID_None, nsGkAtoms::download, aDownload);
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}
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void
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SVGAElement::SetDownload(const nsAString & aDownload, ErrorResult& rv)
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{
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rv = SetAttr(kNameSpaceID_None, nsGkAtoms::download, aDownload, true);
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}
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//----------------------------------------------------------------------
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// nsIContent methods
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nsresult
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SVGAElement::BindToTree(nsIDocument *aDocument, nsIContent *aParent,
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nsIContent *aBindingParent,
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bool aCompileEventHandlers)
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{
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Link::ResetLinkState(false, Link::ElementHasHref());
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nsresult rv = SVGAElementBase::BindToTree(aDocument, aParent,
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aBindingParent,
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aCompileEventHandlers);
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NS_ENSURE_SUCCESS(rv, rv);
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nsIDocument* doc = GetComposedDoc();
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if (doc) {
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doc->RegisterPendingLinkUpdate(this);
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}
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return NS_OK;
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}
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void
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SVGAElement::UnbindFromTree(bool aDeep, bool aNullParent)
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{
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// If this link is ever reinserted into a document, it might
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// be under a different xml:base, so forget the cached state now.
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Link::ResetLinkState(false, Link::ElementHasHref());
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SVGAElementBase::UnbindFromTree(aDeep, aNullParent);
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}
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already_AddRefed<nsIURI>
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SVGAElement::GetHrefURI() const
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{
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nsCOMPtr<nsIURI> hrefURI;
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return IsLink(getter_AddRefs(hrefURI)) ? hrefURI.forget() : nullptr;
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}
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NS_IMETHODIMP_(bool)
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SVGAElement::IsAttributeMapped(const nsAtom* 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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SVGAElementBase::IsAttributeMapped(name);
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}
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int32_t
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SVGAElement::TabIndexDefault()
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{
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return 0;
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}
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static bool
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IsNodeInEditableRegion(nsINode* aNode)
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{
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while (aNode) {
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if (aNode->IsEditable()) {
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return true;
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}
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aNode = aNode->GetParent();
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}
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return false;
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}
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bool
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SVGAElement::IsSVGFocusable(bool* aIsFocusable, int32_t* aTabIndex)
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{
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if (nsSVGElement::IsSVGFocusable(aIsFocusable, aTabIndex)) {
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return true;
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}
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// cannot focus links if there is no link handler
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nsIDocument* doc = GetComposedDoc();
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if (doc) {
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nsPresContext* presContext = doc->GetPresContext();
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if (presContext && !presContext->GetLinkHandler()) {
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*aIsFocusable = false;
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return false;
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}
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}
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// Links that are in an editable region should never be focusable, even if
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// they are in a contenteditable="false" region.
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if (IsNodeInEditableRegion(this)) {
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if (aTabIndex) {
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*aTabIndex = -1;
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}
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*aIsFocusable = false;
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return true;
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}
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if (!HasAttr(kNameSpaceID_None, nsGkAtoms::tabindex)) {
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// check whether we're actually a link
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if (!Link::HasURI()) {
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// Not tabbable or focusable without href (bug 17605), unless
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// forced to be via presence of nonnegative tabindex attribute
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if (aTabIndex) {
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*aTabIndex = -1;
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}
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*aIsFocusable = false;
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return false;
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}
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}
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if (aTabIndex && (sTabFocusModel & eTabFocus_linksMask) == 0) {
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*aTabIndex = -1;
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}
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*aIsFocusable = true;
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return false;
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}
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bool
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SVGAElement::IsLink(nsIURI** aURI) const
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{
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// To be a clickable XLink for styling and interaction purposes, we require:
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//
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// xlink:href - must be set
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// xlink:type - must be unset or set to "" or set to "simple"
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// xlink:show - must be unset or set to "", "new" or "replace"
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// xlink:actuate - must be unset or set to "" or "onRequest"
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//
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// For any other values, we're either not a *clickable* XLink, or the end
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// result is poorly specified. Either way, we return false.
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static Element::AttrValuesArray sTypeVals[] =
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{ &nsGkAtoms::_empty, &nsGkAtoms::simple, nullptr };
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static Element::AttrValuesArray sShowVals[] =
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{ &nsGkAtoms::_empty, &nsGkAtoms::_new, &nsGkAtoms::replace, nullptr };
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static Element::AttrValuesArray sActuateVals[] =
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{ &nsGkAtoms::_empty, &nsGkAtoms::onRequest, nullptr };
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// Optimization: check for href first for early return
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bool useBareHref = mStringAttributes[HREF].IsExplicitlySet();
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if ((useBareHref || mStringAttributes[XLINK_HREF].IsExplicitlySet()) &&
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FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::type,
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sTypeVals, eCaseMatters) !=
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Element::ATTR_VALUE_NO_MATCH &&
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FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::show,
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sShowVals, eCaseMatters) !=
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Element::ATTR_VALUE_NO_MATCH &&
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FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::actuate,
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sActuateVals, eCaseMatters) !=
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Element::ATTR_VALUE_NO_MATCH) {
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nsCOMPtr<nsIURI> baseURI = GetBaseURI();
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// Get absolute URI
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nsAutoString str;
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const uint8_t idx = useBareHref ? HREF : XLINK_HREF;
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mStringAttributes[idx].GetAnimValue(str, this);
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nsContentUtils::NewURIWithDocumentCharset(aURI, str, OwnerDoc(), baseURI);
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// must promise out param is non-null if we return true
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return !!*aURI;
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}
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*aURI = nullptr;
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return false;
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}
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void
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SVGAElement::GetLinkTarget(nsAString& aTarget)
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{
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mStringAttributes[TARGET].GetAnimValue(aTarget, this);
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if (aTarget.IsEmpty()) {
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static Element::AttrValuesArray sShowVals[] =
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{ &nsGkAtoms::_new, &nsGkAtoms::replace, nullptr };
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switch (FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::show,
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sShowVals, eCaseMatters)) {
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case 0:
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aTarget.AssignLiteral("_blank");
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return;
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case 1:
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return;
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}
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nsIDocument* ownerDoc = OwnerDoc();
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if (ownerDoc) {
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ownerDoc->GetBaseTarget(aTarget);
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}
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}
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}
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EventStates
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SVGAElement::IntrinsicState() const
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{
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return Link::LinkState() | SVGAElementBase::IntrinsicState();
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}
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nsresult
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SVGAElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue,
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nsIPrincipal* aMaybeScriptedPrincipal,
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bool aNotify)
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{
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if (aName == nsGkAtoms::href &&
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(aNameSpaceID == kNameSpaceID_XLink ||
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aNameSpaceID == kNameSpaceID_None)) {
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// We can't assume that null aValue means we no longer have an href, because
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// we could be unsetting xlink:href but still have a null-namespace href, or
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// vice versa. But we can fast-path the case when we _do_ have a new value.
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Link::ResetLinkState(aNotify, aValue || Link::ElementHasHref());
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}
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return SVGAElementBase::AfterSetAttr(aNameSpaceID, aName, aValue, aOldValue,
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aMaybeScriptedPrincipal, aNotify);
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}
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//----------------------------------------------------------------------
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// nsSVGElement methods
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nsSVGElement::StringAttributesInfo
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SVGAElement::GetStringInfo()
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{
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return StringAttributesInfo(mStringAttributes, sStringInfo,
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ArrayLength(sStringInfo));
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}
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} // namespace dom
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} // namespace mozilla
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