зеркало из https://github.com/mozilla/gecko-dev.git
117 строки
3.7 KiB
C++
117 строки
3.7 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 "nsCoreUtils.h"
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#include "DocAccessible.h"
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#include "Role.h"
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#include "States.h"
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#include "nsContentUtils.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/dom/Element.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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: HyperTextAccessibleWrap(aContent, aDoc) {}
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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 HyperTextAccessibleWrap::NativeState() & ~states::READONLY;
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}
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uint64_t HTMLLinkAccessible::NativeLinkState() const {
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EventStates eventState = mContent->AsElement()->State();
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if (eventState.HasState(NS_EVENT_STATE_UNVISITED)) return states::LINKED;
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if (eventState.HasState(NS_EVENT_STATE_VISITED))
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return states::LINKED | states::TRAVERSED;
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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 = HyperTextAccessibleWrap::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(kNameSpaceID_None, nsGkAtoms::name))
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state |= states::SELECTABLE;
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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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uint8_t HTMLLinkAccessible::ActionCount() const {
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return IsLinked() ? 1 : HyperTextAccessible::ActionCount();
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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::DoAction(uint8_t aIndex) const {
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if (!IsLinked()) return HyperTextAccessible::DoAction(aIndex);
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// Action 0 (default action): Jump to link
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if (aIndex != eAction_Jump) return false;
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DoCommand();
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return true;
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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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already_AddRefed<nsIURI> HTMLLinkAccessible::AnchorURIAt(
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uint32_t aAnchorIndex) const {
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return aAnchorIndex == 0 ? mContent->GetHrefURI() : nullptr;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Protected members
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bool HTMLLinkAccessible::IsLinked() const {
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EventStates state = mContent->AsElement()->State();
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return state.HasAtLeastOneOfStates(NS_EVENT_STATE_VISITED |
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NS_EVENT_STATE_UNVISITED);
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}
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