forked from mirrors/gecko-dev
ff4c89901f
This revision implements HTMLLinkAccessible::NativeName, which, if the element is present in an SVG context, checks the xlink:title attribute for the name, as required by the accessible name specification. This revision also removes eight expected failures from the relevant web platform test meta file. Differential Revision: https://phabricator.services.mozilla.com/D203031
140 lines
4.5 KiB
C++
140 lines
4.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "HTMLLinkAccessible.h"
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#include "CacheConstants.h"
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#include "nsCoreUtils.h"
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#include "mozilla/a11y/Role.h"
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#include "States.h"
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#include "nsContentUtils.h"
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#include "mozilla/a11y/DocAccessible.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/MutationEventBinding.h"
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using namespace mozilla;
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using namespace mozilla::a11y;
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////////////////////////////////////////////////////////////////////////////////
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// HTMLLinkAccessible
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////////////////////////////////////////////////////////////////////////////////
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HTMLLinkAccessible::HTMLLinkAccessible(nsIContent* aContent,
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DocAccessible* aDoc)
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: HyperTextAccessible(aContent, aDoc) {
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mType = eHTMLLinkType;
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}
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////////////////////////////////////////////////////////////////////////////////
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// nsIAccessible
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role HTMLLinkAccessible::NativeRole() const { return roles::LINK; }
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uint64_t HTMLLinkAccessible::NativeState() const {
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return HyperTextAccessible::NativeState() & ~states::READONLY;
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}
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uint64_t HTMLLinkAccessible::NativeLinkState() const {
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dom::ElementState state = mContent->AsElement()->State();
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if (state.HasState(dom::ElementState::UNVISITED)) {
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return states::LINKED;
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}
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if (state.HasState(dom::ElementState::VISITED)) {
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return states::LINKED | states::TRAVERSED;
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}
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// This is a either named anchor (a link with also a name attribute) or
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// it doesn't have any attributes. Check if 'click' event handler is
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// registered, otherwise bail out.
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return nsCoreUtils::HasClickListener(mContent) ? states::LINKED : 0;
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}
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uint64_t HTMLLinkAccessible::NativeInteractiveState() const {
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uint64_t state = HyperTextAccessible::NativeInteractiveState();
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// This is how we indicate it is a named anchor. In other words, this anchor
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// can be selected as a location :) There is no other better state to use to
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// indicate this.
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if (mContent->AsElement()->HasAttr(nsGkAtoms::name)) {
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state |= states::SELECTABLE;
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}
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return state;
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}
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void HTMLLinkAccessible::Value(nsString& aValue) const {
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aValue.Truncate();
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HyperTextAccessible::Value(aValue);
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if (aValue.IsEmpty()) {
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nsContentUtils::GetLinkLocation(mContent->AsElement(), aValue);
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}
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}
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bool HTMLLinkAccessible::HasPrimaryAction() const {
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return IsLinked() || HyperTextAccessible::HasPrimaryAction();
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;
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}
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void HTMLLinkAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) {
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aName.Truncate();
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if (!IsLinked()) {
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HyperTextAccessible::ActionNameAt(aIndex, aName);
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return;
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}
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// Action 0 (default action): Jump to link
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if (aIndex == eAction_Jump) aName.AssignLiteral("jump");
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}
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bool HTMLLinkAccessible::AttributeChangesState(nsAtom* aAttribute) {
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return aAttribute == nsGkAtoms::href ||
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HyperTextAccessible::AttributeChangesState(aAttribute);
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}
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void HTMLLinkAccessible::DOMAttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType,
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const nsAttrValue* aOldValue,
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uint64_t aOldState) {
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HyperTextAccessible::DOMAttributeChanged(aNameSpaceID, aAttribute, aModType,
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aOldValue, aOldState);
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if (aAttribute == nsGkAtoms::href &&
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(aModType == dom::MutationEvent_Binding::ADDITION ||
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aModType == dom::MutationEvent_Binding::REMOVAL)) {
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mDoc->QueueCacheUpdate(this, CacheDomain::Actions);
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}
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}
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ENameValueFlag HTMLLinkAccessible::NativeName(nsString& aName) const {
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if (mContent->IsSVGElement()) {
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mContent->AsElement()->GetAttr(kNameSpaceID_XLink, nsGkAtoms::title, aName);
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if (!aName.IsEmpty()) {
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return eNameOK;
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}
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}
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return HyperTextAccessible::NativeName(aName);
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}
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////////////////////////////////////////////////////////////////////////////////
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// HyperLinkAccessible
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bool HTMLLinkAccessible::IsLink() const {
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// Expose HyperLinkAccessible unconditionally.
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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// HTMLLinkAccessible
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bool HTMLLinkAccessible::IsLinked() const {
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dom::ElementState state = mContent->AsElement()->State();
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return state.HasAtLeastOneOfStates(dom::ElementState::VISITED_OR_UNVISITED);
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}
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