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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "HTMLLinkAccessible.h"
#include "CacheConstants.h"
#include "nsCoreUtils.h"
#include "mozilla/a11y/Role.h"
#include "States.h"
#include "nsContentUtils.h"
#include "mozilla/a11y/DocAccessible.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/MutationEventBinding.h"
using namespace mozilla;
using namespace mozilla::a11y;
////////////////////////////////////////////////////////////////////////////////
// HTMLLinkAccessible
////////////////////////////////////////////////////////////////////////////////
HTMLLinkAccessible::HTMLLinkAccessible(nsIContent* aContent,
DocAccessible* aDoc)
: HyperTextAccessible(aContent, aDoc) {
mType = eHTMLLinkType;
}
////////////////////////////////////////////////////////////////////////////////
// nsIAccessible
role HTMLLinkAccessible::NativeRole() const { return roles::LINK; }
uint64_t HTMLLinkAccessible::NativeState() const {
return HyperTextAccessible::NativeState() & ~states::READONLY;
}
uint64_t HTMLLinkAccessible::NativeLinkState() const {
dom::ElementState state = mContent->AsElement()->State();
if (state.HasState(dom::ElementState::UNVISITED)) {
return states::LINKED;
}
if (state.HasState(dom::ElementState::VISITED)) {
return states::LINKED | states::TRAVERSED;
}
// This is a either named anchor (a link with also a name attribute) or
// it doesn't have any attributes. Check if 'click' event handler is
// registered, otherwise bail out.
return nsCoreUtils::HasClickListener(mContent) ? states::LINKED : 0;
}
uint64_t HTMLLinkAccessible::NativeInteractiveState() const {
uint64_t state = HyperTextAccessible::NativeInteractiveState();
// This is how we indicate it is a named anchor. In other words, this anchor
// can be selected as a location :) There is no other better state to use to
// indicate this.
if (mContent->AsElement()->HasAttr(nsGkAtoms::name)) {
state |= states::SELECTABLE;
}
return state;
}
void HTMLLinkAccessible::Value(nsString& aValue) const {
aValue.Truncate();
HyperTextAccessible::Value(aValue);
if (aValue.IsEmpty()) {
nsContentUtils::GetLinkLocation(mContent->AsElement(), aValue);
}
}
bool HTMLLinkAccessible::HasPrimaryAction() const {
return IsLinked() || HyperTextAccessible::HasPrimaryAction();
;
}
void HTMLLinkAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) {
aName.Truncate();
if (!IsLinked()) {
HyperTextAccessible::ActionNameAt(aIndex, aName);
return;
}
// Action 0 (default action): Jump to link
if (aIndex == eAction_Jump) aName.AssignLiteral("jump");
}
bool HTMLLinkAccessible::AttributeChangesState(nsAtom* aAttribute) {
return aAttribute == nsGkAtoms::href ||
HyperTextAccessible::AttributeChangesState(aAttribute);
}
void HTMLLinkAccessible::DOMAttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType,
const nsAttrValue* aOldValue,
uint64_t aOldState) {
HyperTextAccessible::DOMAttributeChanged(aNameSpaceID, aAttribute, aModType,
aOldValue, aOldState);
if (aAttribute == nsGkAtoms::href &&
(aModType == dom::MutationEvent_Binding::ADDITION ||
aModType == dom::MutationEvent_Binding::REMOVAL)) {
mDoc->QueueCacheUpdate(this, CacheDomain::Actions);
}
}
ENameValueFlag HTMLLinkAccessible::NativeName(nsString& aName) const {
if (mContent->IsSVGElement()) {
mContent->AsElement()->GetAttr(kNameSpaceID_XLink, nsGkAtoms::title, aName);
if (!aName.IsEmpty()) {
return eNameOK;
}
}
return HyperTextAccessible::NativeName(aName);
}
////////////////////////////////////////////////////////////////////////////////
// HyperLinkAccessible
bool HTMLLinkAccessible::IsLink() const {
// Expose HyperLinkAccessible unconditionally.
return true;
}
////////////////////////////////////////////////////////////////////////////////
// HTMLLinkAccessible
bool HTMLLinkAccessible::IsLinked() const {
dom::ElementState state = mContent->AsElement()->State();
return state.HasAtLeastOneOfStates(dom::ElementState::VISITED_OR_UNVISITED);
}
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