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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/accessibility/browser_accessibility_win.h"
#include "content/browser/accessibility/browser_accessibility_manager.h"
#include "content/browser/accessibility/browser_accessibility_state_impl.h"
#include "ui/base/win/atl_module.h"
namespace content {
// static
BrowserAccessibility* BrowserAccessibility::Create() {
return new BrowserAccessibilityWin();
}
BrowserAccessibilityWin::BrowserAccessibilityWin() {
ui::win::CreateATLModuleIfNeeded();
HRESULT hr = CComObject<BrowserAccessibilityComWin>::CreateInstance(
&browser_accessibility_com_);
DCHECK(SUCCEEDED(hr));
browser_accessibility_com_->AddRef();
// Set the delegate to us
browser_accessibility_com_->Init(this);
}
BrowserAccessibilityWin::~BrowserAccessibilityWin() {
if (browser_accessibility_com_) {
browser_accessibility_com_->Destroy();
browser_accessibility_com_ = nullptr;
}
}
void BrowserAccessibilityWin::UpdatePlatformAttributes() {
GetCOM()->UpdateStep1ComputeWinAttributes();
GetCOM()->UpdateStep2ComputeHypertext();
GetCOM()->UpdateStep3FireEvents();
}
bool BrowserAccessibilityWin::CanFireEvents() const {
// On Windows, we want to hide the subtree of a collapsed <select> element but
// we still need to fire events on those hidden nodes.
if (!IsIgnored() && GetCollapsedMenuListPopUpButtonAncestor())
return true;
return BrowserAccessibility::CanFireEvents();
}
ui::AXPlatformNode* BrowserAccessibilityWin::GetAXPlatformNode() const {
return GetCOM();
}
void BrowserAccessibilityWin::OnLocationChanged() {
GetCOM()->FireNativeEvent(EVENT_OBJECT_LOCATIONCHANGE);
}
base::string16 BrowserAccessibilityWin::GetText() const {
return GetHypertext();
}
base::string16 BrowserAccessibilityWin::GetHypertext() const {
return GetCOM()->AXPlatformNodeWin::GetHypertext();
}
const std::vector<gfx::NativeViewAccessible>
BrowserAccessibilityWin::GetUIADescendants() const {
std::vector<gfx::NativeViewAccessible> descendants;
if (!IsIgnored() && !ShouldHideChildrenForUIA() && PlatformChildCount() > 0) {
BrowserAccessibility* next_sibling_node = PlatformGetNextSibling();
BrowserAccessibility* next_descendant_node =
BrowserAccessibilityManager::NextInTreeOrder(this);
while (next_descendant_node && next_descendant_node != next_sibling_node) {
// Don't add an ignored node to the returned descendants.
if (!next_descendant_node->IsIgnored()) {
descendants.emplace_back(
next_descendant_node->GetNativeViewAccessible());
if (!ToBrowserAccessibilityWin(next_descendant_node)
->ShouldHideChildrenForUIA()) {
next_descendant_node = BrowserAccessibilityManager::NextInTreeOrder(
next_descendant_node);
continue;
}
}
// When a node is ignored or hides its children, don't return any of its
// descendants.
next_descendant_node =
BrowserAccessibilityManager::NextNonDescendantInTreeOrder(
next_descendant_node);
}
}
return descendants;
}
gfx::NativeViewAccessible BrowserAccessibilityWin::GetNativeViewAccessible() {
return GetCOM();
}
BrowserAccessibilityComWin* BrowserAccessibilityWin::GetCOM() const {
DCHECK(browser_accessibility_com_);
return browser_accessibility_com_;
}
BrowserAccessibilityWin* ToBrowserAccessibilityWin(BrowserAccessibility* obj) {
return static_cast<BrowserAccessibilityWin*>(obj);
}
const BrowserAccessibilityWin* ToBrowserAccessibilityWin(
const BrowserAccessibility* obj) {
return static_cast<const BrowserAccessibilityWin*>(obj);
}
ui::TextAttributeList BrowserAccessibilityWin::ComputeTextAttributes() const {
return GetCOM()->AXPlatformNodeWin::ComputeTextAttributes();
}
bool BrowserAccessibilityWin::ShouldHideChildrenForUIA() const {
return GetCOM()->AXPlatformNodeWin::ShouldHideChildrenForUIA();
}
} // namespace content
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