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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 "BaseAccessibles.h"
#include "Accessible-inl.h"
#include "HyperTextAccessibleWrap.h"
#include "nsAccessibilityService.h"
#include "nsAccUtils.h"
#include "nsCoreUtils.h"
#include "Role.h"
#include "States.h"
#include "nsIURI.h"
using namespace mozilla::a11y;
////////////////////////////////////////////////////////////////////////////////
// LeafAccessible
////////////////////////////////////////////////////////////////////////////////
LeafAccessible::LeafAccessible(nsIContent* aContent, DocAccessible* aDoc)
: AccessibleWrap(aContent, aDoc) {
mStateFlags |= eNoKidsFromDOM;
}
////////////////////////////////////////////////////////////////////////////////
// LeafAccessible: Accessible public
Accessible* LeafAccessible::ChildAtPoint(int32_t aX, int32_t aY,
EWhichChildAtPoint aWhichChild) {
// Don't walk into leaf accessibles.
return this;
}
bool LeafAccessible::InsertChildAt(uint32_t aIndex, Accessible* aChild) {
MOZ_ASSERT_UNREACHABLE("InsertChildAt called on leaf accessible!");
return false;
}
bool LeafAccessible::RemoveChild(Accessible* aChild) {
MOZ_ASSERT_UNREACHABLE("RemoveChild called on leaf accessible!");
return false;
}
bool LeafAccessible::IsAcceptableChild(nsIContent* aEl) const {
// No children for leaf accessible.
return false;
}
////////////////////////////////////////////////////////////////////////////////
// LinkableAccessible
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
// LinkableAccessible. nsIAccessible
void LinkableAccessible::TakeFocus() const {
if (const Accessible* actionAcc = ActionWalk()) {
actionAcc->TakeFocus();
} else {
AccessibleWrap::TakeFocus();
}
}
uint64_t LinkableAccessible::NativeLinkState() const {
bool isLink;
const Accessible* actionAcc = ActionWalk(&isLink);
if (isLink) {
return states::LINKED | (actionAcc->LinkState() & states::TRAVERSED);
}
return 0;
}
void LinkableAccessible::Value(nsString& aValue) const {
aValue.Truncate();
Accessible::Value(aValue);
if (!aValue.IsEmpty()) {
return;
}
bool isLink;
const Accessible* actionAcc = ActionWalk(&isLink);
if (isLink) {
actionAcc->Value(aValue);
}
}
uint8_t LinkableAccessible::ActionCount() const {
bool isLink, isOnclick, isLabelWithControl;
ActionWalk(&isLink, &isOnclick, &isLabelWithControl);
return (isLink || isOnclick || isLabelWithControl) ? 1 : 0;
}
const Accessible* LinkableAccessible::ActionWalk(
bool* aIsLink, bool* aIsOnclick, bool* aIsLabelWithControl) const {
if (aIsOnclick) {
*aIsOnclick = false;
}
if (aIsLink) {
*aIsLink = false;
}
if (aIsLabelWithControl) {
*aIsLabelWithControl = false;
}
if (nsCoreUtils::HasClickListener(mContent)) {
if (aIsOnclick) {
*aIsOnclick = true;
}
return nullptr;
}
// XXX: The logic looks broken since the click listener may be registered
// on non accessible node in parent chain but this node is skipped when tree
// is traversed.
const Accessible* walkUpAcc = this;
while ((walkUpAcc = walkUpAcc->Parent()) && !walkUpAcc->IsDoc()) {
if (walkUpAcc->LinkState() & states::LINKED) {
if (aIsLink) {
*aIsLink = true;
}
return walkUpAcc;
}
if (nsCoreUtils::HasClickListener(walkUpAcc->GetContent())) {
if (aIsOnclick) {
*aIsOnclick = true;
}
return walkUpAcc;
}
if (nsCoreUtils::IsLabelWithControl(walkUpAcc->GetContent())) {
if (aIsLabelWithControl) {
*aIsLabelWithControl = true;
}
return walkUpAcc;
}
}
return nullptr;
}
void LinkableAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) {
aName.Truncate();
// Action 0 (default action): Jump to link
if (aIndex == eAction_Jump) {
bool isOnclick, isLink, isLabelWithControl;
ActionWalk(&isLink, &isOnclick, &isLabelWithControl);
if (isLink) {
aName.AssignLiteral("jump");
} else if (isOnclick || isLabelWithControl) {
aName.AssignLiteral("click");
}
}
}
bool LinkableAccessible::DoAction(uint8_t aIndex) const {
if (aIndex != eAction_Jump) {
return false;
}
if (const Accessible* actionAcc = ActionWalk()) {
return actionAcc->DoAction(aIndex);
}
return AccessibleWrap::DoAction(aIndex);
}
KeyBinding LinkableAccessible::AccessKey() const {
if (const Accessible* actionAcc =
const_cast<LinkableAccessible*>(this)->ActionWalk()) {
return actionAcc->AccessKey();
}
return Accessible::AccessKey();
}
////////////////////////////////////////////////////////////////////////////////
// LinkableAccessible: HyperLinkAccessible
already_AddRefed<nsIURI> LinkableAccessible::AnchorURIAt(
uint32_t aAnchorIndex) const {
bool isLink;
const Accessible* actionAcc = ActionWalk(&isLink);
if (isLink) {
NS_ASSERTION(actionAcc->IsLink(), "HyperLink isn't implemented.");
if (actionAcc->IsLink()) {
return actionAcc->AnchorURIAt(aAnchorIndex);
}
}
return nullptr;
}
////////////////////////////////////////////////////////////////////////////////
// DummyAccessible
////////////////////////////////////////////////////////////////////////////////
uint64_t DummyAccessible::NativeState() const { return 0; }
uint64_t DummyAccessible::NativeInteractiveState() const { return 0; }
uint64_t DummyAccessible::NativeLinkState() const { return 0; }
bool DummyAccessible::NativelyUnavailable() const { return false; }
void DummyAccessible::ApplyARIAState(uint64_t* aState) const {}
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