1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_ 6 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_ 7 8 #include <oleacc.h> 9 10 #include "base/memory/scoped_ptr.h" 11 #include "base/win/scoped_comptr.h" 12 #include "content/browser/accessibility/browser_accessibility_manager.h" 13 14 namespace content { 15 class BrowserAccessibilityWin; 16 17 class LegacyRenderWidgetHostHWND; 18 19 // Manages a tree of BrowserAccessibilityWin objects. 20 class CONTENT_EXPORT BrowserAccessibilityManagerWin 21 : public BrowserAccessibilityManager { 22 public: 23 BrowserAccessibilityManagerWin( 24 content::LegacyRenderWidgetHostHWND* accessible_hwnd, 25 IAccessible* parent_iaccessible, 26 const ui::AXTreeUpdate& initial_tree, 27 BrowserAccessibilityDelegate* delegate, 28 BrowserAccessibilityFactory* factory = new BrowserAccessibilityFactory()); 29 30 virtual ~BrowserAccessibilityManagerWin(); 31 32 static ui::AXTreeUpdate GetEmptyDocument(); 33 34 // Get the closest containing HWND. 35 HWND parent_hwnd() { return parent_hwnd_; } 36 37 // The IAccessible for the parent window. 38 IAccessible* parent_iaccessible() { return parent_iaccessible_; } 39 void set_parent_iaccessible(IAccessible* parent_iaccessible) { 40 parent_iaccessible_ = parent_iaccessible; 41 } 42 43 void SetAccessibleHWND(LegacyRenderWidgetHostHWND* accessible_hwnd); 44 45 // Calls NotifyWinEvent if the parent window's IAccessible pointer is known. 46 void MaybeCallNotifyWinEvent(DWORD event, LONG child_id); 47 48 // AXTree methods 49 virtual void OnNodeWillBeDeleted(ui::AXNode* node) OVERRIDE; 50 virtual void OnNodeCreated(ui::AXNode* node) OVERRIDE; 51 52 // BrowserAccessibilityManager methods 53 virtual void OnWindowFocused() OVERRIDE; 54 virtual void NotifyAccessibilityEvent( 55 ui::AXEvent event_type, BrowserAccessibility* node) OVERRIDE; 56 57 // Track this object and post a VISIBLE_DATA_CHANGED notification when 58 // its container scrolls. 59 // TODO(dmazzoni): remove once http://crbug.com/113483 is fixed. 60 void TrackScrollingObject(BrowserAccessibilityWin* node); 61 62 // Return a pointer to the object corresponding to the given windows-specific 63 // unique id, does not make a new reference. 64 BrowserAccessibilityWin* GetFromUniqueIdWin(LONG unique_id_win); 65 66 // Called when |accessible_hwnd_| is deleted by its parent. 67 void OnAccessibleHwndDeleted(); 68 69 protected: 70 // BrowserAccessibilityManager methods 71 virtual void OnRootChanged(ui::AXNode* new_root) OVERRIDE; 72 73 private: 74 // The closest ancestor HWND. 75 HWND parent_hwnd_; 76 77 // The accessibility instance for the parent window. 78 IAccessible* parent_iaccessible_; 79 80 // Give BrowserAccessibilityManager::Create access to our constructor. 81 friend class BrowserAccessibilityManager; 82 83 // Track the most recent object that has been asked to scroll and 84 // post a notification directly on it when it reaches its destination. 85 // TODO(dmazzoni): remove once http://crbug.com/113483 is fixed. 86 BrowserAccessibilityWin* tracked_scroll_object_; 87 88 // A mapping from the Windows-specific unique IDs (unique within the 89 // browser process) to accessibility ids within this page. 90 base::hash_map<long, int32> unique_id_to_ax_id_map_; 91 92 // Owned by its parent; OnAccessibleHwndDeleted gets called upon deletion. 93 LegacyRenderWidgetHostHWND* accessible_hwnd_; 94 95 // Set to true if we need to fire a focus event on the root as soon as 96 // possible. 97 bool focus_event_on_root_needed_; 98 99 DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManagerWin); 100 }; 101 102 } // namespace content 103 104 #endif // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_ 105
