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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 "nsCoreUtils.h"
#include "DocAccessible.h"
#include "Role.h"
#include "States.h"
#include "nsContentUtils.h"
#include "mozilla/EventStates.h"
#include "mozilla/dom/Element.h"
using namespace mozilla;
using namespace mozilla::a11y;
////////////////////////////////////////////////////////////////////////////////
// HTMLLinkAccessible
////////////////////////////////////////////////////////////////////////////////
HTMLLinkAccessible::
HTMLLinkAccessible(nsIContent* aContent, DocAccessible* aDoc) :
HyperTextAccessibleWrap(aContent, aDoc)
{
}
NS_IMPL_ISUPPORTS_INHERITED0(HTMLLinkAccessible, HyperTextAccessible)
////////////////////////////////////////////////////////////////////////////////
// nsIAccessible
role
HTMLLinkAccessible::NativeRole()
{
return roles::LINK;
}
uint64_t
HTMLLinkAccessible::NativeState()
{
return HyperTextAccessibleWrap::NativeState() & ~states::READONLY;
}
uint64_t
HTMLLinkAccessible::NativeLinkState() const
{
EventStates eventState = mContent->AsElement()->State();
if (eventState.HasState(NS_EVENT_STATE_UNVISITED))
return states::LINKED;
if (eventState.HasState(NS_EVENT_STATE_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 = HyperTextAccessibleWrap::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->HasAttr(kNameSpaceID_None, nsGkAtoms::name))
state |= states::SELECTABLE;
return state;
}
void
HTMLLinkAccessible::Value(nsString& aValue)
{
aValue.Truncate();
HyperTextAccessible::Value(aValue);
if (aValue.IsEmpty())
nsContentUtils::GetLinkLocation(mContent->AsElement(), aValue);
}
uint8_t
HTMLLinkAccessible::ActionCount()
{
return IsLinked() ? 1 : HyperTextAccessible::ActionCount();
}
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::DoAction(uint8_t aIndex)
{
if (!IsLinked())
return HyperTextAccessible::DoAction(aIndex);
// Action 0 (default action): Jump to link
if (aIndex != eAction_Jump)
return false;
DoCommand();
return true;
}
////////////////////////////////////////////////////////////////////////////////
// HyperLinkAccessible
bool
HTMLLinkAccessible::IsLink()
{
// Expose HyperLinkAccessible unconditionally.
return true;
}
already_AddRefed<nsIURI>
HTMLLinkAccessible::AnchorURIAt(uint32_t aAnchorIndex)
{
return aAnchorIndex == 0 ? mContent->GetHrefURI() : nullptr;
}
////////////////////////////////////////////////////////////////////////////////
// Protected members
bool
HTMLLinkAccessible::IsLinked() const
{
EventStates state = mContent->AsElement()->State();
return state.HasAtLeastOneOfStates(NS_EVENT_STATE_VISITED |
NS_EVENT_STATE_UNVISITED);
}
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