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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_manager_win.h"
#include "content/browser/accessibility/browser_accessibility_win.h"
#include "content/common/accessibility_messages.h"
using webkit_glue::WebAccessibility;
// static
BrowserAccessibilityManager* BrowserAccessibilityManager::Create(
gfx::NativeView parent_view,
const WebAccessibility& src,
BrowserAccessibilityDelegate* delegate,
BrowserAccessibilityFactory* factory) {
return new BrowserAccessibilityManagerWin(
parent_view,
src,
delegate,
factory);
}
BrowserAccessibilityManagerWin*
BrowserAccessibilityManager::toBrowserAccessibilityManagerWin() {
return static_cast<BrowserAccessibilityManagerWin*>(this);
}
BrowserAccessibilityManagerWin::BrowserAccessibilityManagerWin(
HWND parent_view,
const WebAccessibility& src,
BrowserAccessibilityDelegate* delegate,
BrowserAccessibilityFactory* factory)
: BrowserAccessibilityManager(parent_view, src, delegate, factory),
tracked_scroll_object_(NULL) {
// Allow NULL parent_view for unit testing.
if (parent_view == NULL) {
window_iaccessible_ = NULL;
return;
}
HRESULT hr = ::CreateStdAccessibleObject(
parent_view, OBJID_WINDOW, IID_IAccessible,
reinterpret_cast<void **>(&window_iaccessible_));
DCHECK(SUCCEEDED(hr));
}
BrowserAccessibilityManagerWin::~BrowserAccessibilityManagerWin() {
if (tracked_scroll_object_) {
tracked_scroll_object_->Release();
tracked_scroll_object_ = NULL;
}
}
IAccessible* BrowserAccessibilityManagerWin::GetParentWindowIAccessible() {
return window_iaccessible_;
}
void BrowserAccessibilityManagerWin::NotifyAccessibilityEvent(
int type,
BrowserAccessibility* node) {
LONG event_id = EVENT_MIN;
switch (type) {
case AccessibilityNotificationActiveDescendantChanged:
event_id = IA2_EVENT_ACTIVE_DESCENDANT_CHANGED;
break;
case AccessibilityNotificationBlur:
// Equivalent to focus on the root.
event_id = EVENT_OBJECT_FOCUS;
node = GetRoot();
break;
case AccessibilityNotificationCheckStateChanged:
event_id = EVENT_OBJECT_STATECHANGE;
break;
case AccessibilityNotificationChildrenChanged:
event_id = EVENT_OBJECT_REORDER;
break;
case AccessibilityNotificationFocusChanged:
event_id = EVENT_OBJECT_FOCUS;
break;
case AccessibilityNotificationLoadComplete:
event_id = IA2_EVENT_DOCUMENT_LOAD_COMPLETE;
break;
case AccessibilityNotificationValueChanged:
event_id = EVENT_OBJECT_VALUECHANGE;
break;
case AccessibilityNotificationSelectedTextChanged:
event_id = IA2_EVENT_TEXT_CARET_MOVED;
break;
case AccessibilityNotificationLiveRegionChanged:
event_id = EVENT_OBJECT_REORDER;
break;
case AccessibilityNotificationTextInserted:
event_id = IA2_EVENT_TEXT_INSERTED;
break;
case AccessibilityNotificationTextRemoved:
event_id = IA2_EVENT_TEXT_REMOVED;
break;
case AccessibilityNotificationObjectShow:
event_id = EVENT_OBJECT_SHOW;
break;
case AccessibilityNotificationObjectHide:
event_id = EVENT_OBJECT_HIDE;
break;
case AccessibilityNotificationAlert:
event_id = EVENT_SYSTEM_ALERT;
break;
case AccessibilityNotificationMenuListItemSelected:
event_id = EVENT_OBJECT_FOCUS;
break;
case AccessibilityNotificationMenuListValueChanged:
event_id = EVENT_OBJECT_VALUECHANGE;
break;
case AccessibilityNotificationSelectedChildrenChanged:
event_id = EVENT_OBJECT_SELECTIONWITHIN;
break;
default:
// Not all WebKit accessibility events result in a Windows
// accessibility notification.
break;
}
if (event_id != EVENT_MIN)
NotifyWinEvent(event_id, GetParentView(), OBJID_CLIENT, node->child_id());
// If this is a layout complete notification (sent when a container scrolls)
// and there is a descendant tracked object, send a notification on it.
// TODO(dmazzoni): remove once http://crbug.com/113483 is fixed.
if (type == AccessibilityNotificationLayoutComplete &&
tracked_scroll_object_ &&
tracked_scroll_object_->IsDescendantOf(node)) {
NotifyWinEvent(IA2_EVENT_VISIBLE_DATA_CHANGED,
GetParentView(),
OBJID_CLIENT,
tracked_scroll_object_->child_id());
tracked_scroll_object_->Release();
tracked_scroll_object_ = NULL;
}
}
void BrowserAccessibilityManagerWin::TrackScrollingObject(
BrowserAccessibilityWin* node) {
if (tracked_scroll_object_)
tracked_scroll_object_->Release();
tracked_scroll_object_ = node;
tracked_scroll_object_->AddRef();
}
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