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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.
#ifndef CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_
#define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_
#include <oleacc.h>
#include "base/memory/scoped_ptr.h"
#include "base/win/scoped_comptr.h"
#include "content/browser/accessibility/browser_accessibility_manager.h"
namespace content {
class BrowserAccessibilityWin;
class LegacyRenderWidgetHostHWND;
// Manages a tree of BrowserAccessibilityWin objects.
class CONTENT_EXPORT BrowserAccessibilityManagerWin
: public BrowserAccessibilityManager {
public:
BrowserAccessibilityManagerWin(
content::LegacyRenderWidgetHostHWND* accessible_hwnd,
IAccessible* parent_iaccessible,
const ui::AXTreeUpdate& initial_tree,
BrowserAccessibilityDelegate* delegate,
BrowserAccessibilityFactory* factory = new BrowserAccessibilityFactory());
virtual ~BrowserAccessibilityManagerWin();
static ui::AXTreeUpdate GetEmptyDocument();
// Get the closest containing HWND.
HWND parent_hwnd() { return parent_hwnd_; }
// The IAccessible for the parent window.
IAccessible* parent_iaccessible() { return parent_iaccessible_; }
void set_parent_iaccessible(IAccessible* parent_iaccessible) {
parent_iaccessible_ = parent_iaccessible;
}
// Calls NotifyWinEvent if the parent window's IAccessible pointer is known.
void MaybeCallNotifyWinEvent(DWORD event, LONG child_id);
// AXTree methods
virtual void OnNodeWillBeDeleted(ui::AXNode* node) OVERRIDE;
virtual void OnNodeCreated(ui::AXNode* node) OVERRIDE;
// BrowserAccessibilityManager methods
virtual void OnWindowFocused() OVERRIDE;
virtual void OnWindowBlurred() OVERRIDE;
virtual void NotifyAccessibilityEvent(
ui::AXEvent event_type, BrowserAccessibility* node) OVERRIDE;
// Track this object and post a VISIBLE_DATA_CHANGED notification when
// its container scrolls.
// TODO(dmazzoni): remove once http://crbug.com/113483 is fixed.
void TrackScrollingObject(BrowserAccessibilityWin* node);
// Return a pointer to the object corresponding to the given windows-specific
// unique id, does not make a new reference.
BrowserAccessibilityWin* GetFromUniqueIdWin(LONG unique_id_win);
// Called when |accessible_hwnd_| is deleted by its parent.
void OnAccessibleHwndDeleted();
protected:
// BrowserAccessibilityManager methods
virtual void OnRootChanged(ui::AXNode* new_root) OVERRIDE;
private:
// The closest ancestor HWND.
HWND parent_hwnd_;
// The accessibility instance for the parent window.
IAccessible* parent_iaccessible_;
// Give BrowserAccessibilityManager::Create access to our constructor.
friend class BrowserAccessibilityManager;
// Track the most recent object that has been asked to scroll and
// post a notification directly on it when it reaches its destination.
// TODO(dmazzoni): remove once http://crbug.com/113483 is fixed.
BrowserAccessibilityWin* tracked_scroll_object_;
// A mapping from the Windows-specific unique IDs (unique within the
// browser process) to accessibility ids within this page.
base::hash_map<long, int32> unique_id_to_ax_id_map_;
// Owned by its parent; OnAccessibleHwndDeleted gets called upon deletion.
LegacyRenderWidgetHostHWND* accessible_hwnd_;
DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManagerWin);
};
} // namespace content
#endif // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_
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