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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_COMPLETE_H_ | 5 #ifndef CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_COMPLETE_H_ |
6 #define CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_COMPLETE_H_ | 6 #define CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_COMPLETE_H_ |
7 | 7 |
8 #include <set> | 8 #include <set> |
9 #include <vector> | 9 #include <vector> |
10 | 10 |
11 #include "base/containers/hash_tables.h" | 11 #include "base/containers/hash_tables.h" |
12 #include "base/memory/weak_ptr.h" | 12 #include "base/memory/weak_ptr.h" |
13 #include "content/common/accessibility_node_data.h" | 13 #include "content/common/accessibility_node_data.h" |
14 #include "content/public/renderer/render_view_observer.h" | 14 #include "content/public/renderer/render_view_observer.h" |
15 #include "content/renderer/accessibility/renderer_accessibility.h" | 15 #include "content/renderer/accessibility/renderer_accessibility.h" |
16 #include "third_party/WebKit/public/web/WebAXEnums.h" | 16 #include "third_party/WebKit/public/web/WebAXEnums.h" |
17 #include "third_party/WebKit/public/web/WebAXObject.h" | 17 #include "third_party/WebKit/public/web/WebAXObject.h" |
18 | 18 |
19 namespace WebKit { | 19 namespace blink { |
20 class WebDocument; | 20 class WebDocument; |
21 class WebNode; | 21 class WebNode; |
22 }; | 22 }; |
23 | 23 |
24 namespace content { | 24 namespace content { |
25 class RenderViewImpl; | 25 class RenderViewImpl; |
26 | 26 |
27 // This is the subclass of RendererAccessibility that implements | 27 // This is the subclass of RendererAccessibility that implements |
28 // complete accessibility support for assistive technology (as opposed to | 28 // complete accessibility support for assistive technology (as opposed to |
29 // partial support - see RendererAccessibilityFocusOnly). | 29 // partial support - see RendererAccessibilityFocusOnly). |
30 // | 30 // |
31 // This version turns on WebKit's accessibility code and sends | 31 // This version turns on WebKit's accessibility code and sends |
32 // a serialized representation of that tree whenever it changes. It also | 32 // a serialized representation of that tree whenever it changes. It also |
33 // handles requests from the browser to perform accessibility actions on | 33 // handles requests from the browser to perform accessibility actions on |
34 // nodes in the tree (e.g., change focus, or click on a button). | 34 // nodes in the tree (e.g., change focus, or click on a button). |
35 class CONTENT_EXPORT RendererAccessibilityComplete | 35 class CONTENT_EXPORT RendererAccessibilityComplete |
36 : public RendererAccessibility { | 36 : public RendererAccessibility { |
37 public: | 37 public: |
38 explicit RendererAccessibilityComplete(RenderViewImpl* render_view); | 38 explicit RendererAccessibilityComplete(RenderViewImpl* render_view); |
39 virtual ~RendererAccessibilityComplete(); | 39 virtual ~RendererAccessibilityComplete(); |
40 | 40 |
41 // RenderView::Observer implementation. | 41 // RenderView::Observer implementation. |
42 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; | 42 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; |
43 virtual void FocusedNodeChanged(const WebKit::WebNode& node) OVERRIDE; | 43 virtual void FocusedNodeChanged(const blink::WebNode& node) OVERRIDE; |
44 virtual void DidFinishLoad(WebKit::WebFrame* frame) OVERRIDE; | 44 virtual void DidFinishLoad(blink::WebFrame* frame) OVERRIDE; |
45 | 45 |
46 // RendererAccessibility. | 46 // RendererAccessibility. |
47 virtual void HandleWebAccessibilityEvent( | 47 virtual void HandleWebAccessibilityEvent( |
48 const WebKit::WebAXObject& obj, WebKit::WebAXEvent event) OVERRIDE; | 48 const blink::WebAXObject& obj, blink::WebAXEvent event) OVERRIDE; |
49 | 49 |
50 // In order to keep track of what nodes the browser knows about, we keep a | 50 // In order to keep track of what nodes the browser knows about, we keep a |
51 // representation of the browser tree - just IDs and parent/child | 51 // representation of the browser tree - just IDs and parent/child |
52 // relationships. | 52 // relationships. |
53 struct CONTENT_EXPORT BrowserTreeNode { | 53 struct CONTENT_EXPORT BrowserTreeNode { |
54 BrowserTreeNode(); | 54 BrowserTreeNode(); |
55 virtual ~BrowserTreeNode(); | 55 virtual ~BrowserTreeNode(); |
56 int32 id; | 56 int32 id; |
57 gfx::Rect location; | 57 gfx::Rect location; |
58 BrowserTreeNode* parent; | 58 BrowserTreeNode* parent; |
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71 // that updates the coordinates of these objects. | 71 // that updates the coordinates of these objects. |
72 void AppendLocationChangeEvents( | 72 void AppendLocationChangeEvents( |
73 std::vector<AccessibilityHostMsg_EventParams>* events); | 73 std::vector<AccessibilityHostMsg_EventParams>* events); |
74 | 74 |
75 private: | 75 private: |
76 // Serialize the given accessibility object |obj| and append it to | 76 // Serialize the given accessibility object |obj| and append it to |
77 // |dst|, and then recursively also serialize any *new* children of | 77 // |dst|, and then recursively also serialize any *new* children of |
78 // |obj|, based on what object ids we know the browser already has. | 78 // |obj|, based on what object ids we know the browser already has. |
79 // The set of ids serialized is added to |ids_serialized|, and any | 79 // The set of ids serialized is added to |ids_serialized|, and any |
80 // ids previously in that set are not serialized again. | 80 // ids previously in that set are not serialized again. |
81 void SerializeChangedNodes(const WebKit::WebAXObject& obj, | 81 void SerializeChangedNodes(const blink::WebAXObject& obj, |
82 std::vector<AccessibilityNodeData>* dst, | 82 std::vector<AccessibilityNodeData>* dst, |
83 std::set<int>* ids_serialized); | 83 std::set<int>* ids_serialized); |
84 | 84 |
85 // Clear the given node and recursively delete all of its descendants | 85 // Clear the given node and recursively delete all of its descendants |
86 // from the browser tree. (Does not delete |browser_node|). | 86 // from the browser tree. (Does not delete |browser_node|). |
87 void ClearBrowserTreeNode(BrowserTreeNode* browser_node); | 87 void ClearBrowserTreeNode(BrowserTreeNode* browser_node); |
88 | 88 |
89 // Handlers for messages from the browser to the renderer. | 89 // Handlers for messages from the browser to the renderer. |
90 void OnDoDefaultAction(int acc_obj_id); | 90 void OnDoDefaultAction(int acc_obj_id); |
91 void OnEventsAck(); | 91 void OnEventsAck(); |
92 void OnChangeScrollPosition(int acc_obj_id, int scroll_x, int scroll_y); | 92 void OnChangeScrollPosition(int acc_obj_id, int scroll_x, int scroll_y); |
93 void OnScrollToMakeVisible(int acc_obj_id, gfx::Rect subfocus); | 93 void OnScrollToMakeVisible(int acc_obj_id, gfx::Rect subfocus); |
94 void OnScrollToPoint(int acc_obj_id, gfx::Point point); | 94 void OnScrollToPoint(int acc_obj_id, gfx::Point point); |
95 void OnSetFocus(int acc_obj_id); | 95 void OnSetFocus(int acc_obj_id); |
96 void OnSetTextSelection(int acc_obj_id, int start_offset, int end_offset); | 96 void OnSetTextSelection(int acc_obj_id, int start_offset, int end_offset); |
97 void OnFatalError(); | 97 void OnFatalError(); |
98 | 98 |
99 // Checks if a WebKit accessibility object is an editable text node. | 99 // Checks if a WebKit accessibility object is an editable text node. |
100 bool IsEditableText(const WebKit::WebAXObject& node); | 100 bool IsEditableText(const blink::WebAXObject& node); |
101 | 101 |
102 // Recursively explore the tree of WebKit accessibility objects rooted | 102 // Recursively explore the tree of WebKit accessibility objects rooted |
103 // at |src|, and for each editable text node encountered, add a | 103 // at |src|, and for each editable text node encountered, add a |
104 // corresponding WebAccessibility node as a child of |dst|. | 104 // corresponding WebAccessibility node as a child of |dst|. |
105 void RecursiveAddEditableTextNodesToTree( | 105 void RecursiveAddEditableTextNodesToTree( |
106 const WebKit::WebAXObject& src, | 106 const blink::WebAXObject& src, |
107 AccessibilityNodeData* dst); | 107 AccessibilityNodeData* dst); |
108 | 108 |
109 // Build a tree of serializable AccessibilityNodeData nodes to send to the | 109 // Build a tree of serializable AccessibilityNodeData nodes to send to the |
110 // browser process, given a WebAXObject node from WebKit. | 110 // browser process, given a WebAXObject node from WebKit. |
111 // Modifies |dst| in-place, it's assumed to be empty. | 111 // Modifies |dst| in-place, it's assumed to be empty. |
112 void BuildAccessibilityTree(const WebKit::WebAXObject& src, | 112 void BuildAccessibilityTree(const blink::WebAXObject& src, |
113 bool include_children, | 113 bool include_children, |
114 AccessibilityNodeData* dst); | 114 AccessibilityNodeData* dst); |
115 | 115 |
116 // So we can queue up tasks to be executed later. | 116 // So we can queue up tasks to be executed later. |
117 base::WeakPtrFactory<RendererAccessibilityComplete> weak_factory_; | 117 base::WeakPtrFactory<RendererAccessibilityComplete> weak_factory_; |
118 | 118 |
119 // Events from WebKit are collected until they are ready to be | 119 // Events from WebKit are collected until they are ready to be |
120 // sent to the browser. | 120 // sent to the browser. |
121 std::vector<AccessibilityHostMsg_EventParams> pending_events_; | 121 std::vector<AccessibilityHostMsg_EventParams> pending_events_; |
122 | 122 |
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139 | 139 |
140 // True if verbose logging of accessibility events is on. | 140 // True if verbose logging of accessibility events is on. |
141 bool logging_; | 141 bool logging_; |
142 | 142 |
143 DISALLOW_COPY_AND_ASSIGN(RendererAccessibilityComplete); | 143 DISALLOW_COPY_AND_ASSIGN(RendererAccessibilityComplete); |
144 }; | 144 }; |
145 | 145 |
146 #endif // CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_COMPLETE_H_ | 146 #endif // CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_COMPLETE_H_ |
147 | 147 |
148 } // namespace content | 148 } // namespace content |
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