blob: e3a887e043c8d7fcf2f550ca363a2912897f5b56 [file] [log] [blame]
// 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 <memory>
#include "base/macros.h"
#include "content/browser/accessibility/browser_accessibility_manager.h"
#include "ui/accessibility/platform/ax_platform_node_win.h"
namespace content {
class BrowserAccessibilityWin;
// Manages a tree of BrowserAccessibilityWin objects.
class CONTENT_EXPORT BrowserAccessibilityManagerWin
: public BrowserAccessibilityManager {
public:
BrowserAccessibilityManagerWin(
const ui::AXTreeUpdate& initial_tree,
BrowserAccessibilityDelegate* delegate,
BrowserAccessibilityFactory* factory = new BrowserAccessibilityFactory());
~BrowserAccessibilityManagerWin() override;
static ui::AXTreeUpdate GetEmptyDocument();
// Get the closest containing HWND.
HWND GetParentHWND();
// BrowserAccessibilityManager methods
void UserIsReloading() override;
BrowserAccessibility* GetFocus() override;
bool CanFireEvents() override;
gfx::Rect GetViewBounds() override;
void FireFocusEvent(BrowserAccessibility* node) override;
void FireBlinkEvent(ax::mojom::Event event_type,
BrowserAccessibility* node) override;
void FireGeneratedEvent(ui::AXEventGenerator::Event event_type,
BrowserAccessibility* node) override;
void FireWinAccessibilityEvent(LONG win_event, BrowserAccessibility* node);
// 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);
// Called when |accessible_hwnd_| is deleted by its parent.
void OnAccessibleHwndDeleted();
protected:
// AXTreeObserver methods.
void OnAtomicUpdateFinished(
ui::AXTree* tree,
bool root_changed,
const std::vector<ui::AXTreeObserver::Change>& changes) override;
private:
// Give BrowserAccessibilityManager::Create access to our constructor.
friend class BrowserAccessibilityManager;
// Keep track of if we got a "load complete" event but were unable to fire
// it because of no HWND, because otherwise JAWS can get very confused.
// TODO(dmazzoni): a better fix would be to always have an HWND.
// http://crbug.com/521877
bool load_complete_pending_;
DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManagerWin);
};
} // namespace content
#endif // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_