148 lines
3.7 KiB
C++
148 lines
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::
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HTMLLinkAccessible(nsIContent* aContent, DocAccessible* aDoc) :
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HyperTextAccessibleWrap(aContent, aDoc)
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{
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}
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NS_IMPL_ISUPPORTS_INHERITED0(HTMLLinkAccessible, HyperTextAccessible)
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////////////////////////////////////////////////////////////////////////////////
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// nsIAccessible
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role
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HTMLLinkAccessible::NativeRole()
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{
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return roles::LINK;
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}
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uint64_t
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HTMLLinkAccessible::NativeState()
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{
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return HyperTextAccessibleWrap::NativeState() & ~states::READONLY;
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}
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uint64_t
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HTMLLinkAccessible::NativeLinkState() const
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{
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EventStates eventState = mContent->AsElement()->State();
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if (eventState.HasState(NS_EVENT_STATE_UNVISITED))
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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
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HTMLLinkAccessible::NativeInteractiveState() const
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{
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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->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
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HTMLLinkAccessible::Value(nsString& aValue)
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{
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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
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HTMLLinkAccessible::ActionCount()
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{
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return IsLinked() ? 1 : HyperTextAccessible::ActionCount();
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}
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void
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HTMLLinkAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName)
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{
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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)
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aName.AssignLiteral("jump");
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}
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bool
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HTMLLinkAccessible::DoAction(uint8_t aIndex)
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{
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if (!IsLinked())
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return HyperTextAccessible::DoAction(aIndex);
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// Action 0 (default action): Jump to link
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if (aIndex != eAction_Jump)
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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
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HTMLLinkAccessible::IsLink()
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{
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// Expose HyperLinkAccessible unconditionally.
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return true;
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}
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already_AddRefed<nsIURI>
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HTMLLinkAccessible::AnchorURIAt(uint32_t aAnchorIndex)
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{
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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
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HTMLLinkAccessible::IsLinked() const
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{
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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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