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_MAC_H_
6 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_MAC_H_
7 
8 #import <Cocoa/Cocoa.h>
9 #include <stdint.h>
10 
11 #include <map>
12 #include <vector>
13 
14 #include "base/macros.h"
15 #include "base/strings/string16.h"
16 #import "content/browser/accessibility/browser_accessibility_cocoa.h"
17 #include "content/browser/accessibility/browser_accessibility_manager.h"
18 #include "content/public/browser/ax_event_notification_details.h"
19 
20 namespace content {
21 
22 class CONTENT_EXPORT BrowserAccessibilityManagerMac
23     : public BrowserAccessibilityManager {
24  public:
25   BrowserAccessibilityManagerMac(
26       const ui::AXTreeUpdate& initial_tree,
27       BrowserAccessibilityDelegate* delegate,
28       BrowserAccessibilityFactory* factory = new BrowserAccessibilityFactory());
29 
30   ~BrowserAccessibilityManagerMac() override;
31 
32   static ui::AXTreeUpdate GetEmptyDocument();
33 
34   BrowserAccessibility* GetFocus() const override;
35 
36   // Implementation of BrowserAccessibilityManager.
37   void FireFocusEvent(BrowserAccessibility* node) override;
38   void FireBlinkEvent(ax::mojom::Event event_type,
39                       BrowserAccessibility* node) override;
40   void FireGeneratedEvent(ui::AXEventGenerator::Event event_type,
41                           BrowserAccessibility* node) override;
42 
43   bool OnAccessibilityEvents(
44       const AXEventNotificationDetails& details) override;
45 
46   id GetParentView();
47   id GetWindow();
48 
49  private:
50   void FireNativeMacNotification(NSString* mac_notification,
51                                  BrowserAccessibility* node);
52 
53   // AXTreeObserver methods.
54   void OnAtomicUpdateFinished(ui::AXTree* tree,
55                               bool root_changed,
56                               const std::vector<Change>& changes) override;
57 
58   // Returns an autoreleased object.
59   NSDictionary* GetUserInfoForSelectedTextChangedNotification();
60 
61   // Returns an autoreleased object.
62   NSDictionary* GetUserInfoForValueChangedNotification(
63       const BrowserAccessibilityCocoa* native_node,
64       const base::string16& deleted_text,
65       const base::string16& inserted_text) const;
66 
67   void AnnounceActiveDescendant(BrowserAccessibility* node) const;
68 
69   bool IsInGeneratedEventBatch(ui::AXEventGenerator::Event event_type) const;
70 
71   // Keeps track of any edits that have been made by the user during a tree
72   // update. Used by NSAccessibilityValueChangedNotification.
73   // Maps AXNode IDs to value attribute changes.
74   std::map<int32_t, AXTextEdit> text_edits_;
75 
76   // This gives BrowserAccessibilityManager::Create access to the class
77   // constructor.
78   friend class BrowserAccessibilityManager;
79 
80   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManagerMac);
81 };
82 
83 }
84 
85 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_MAC_H_
86