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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 UI_ACCESSIBILITY_AX_TREE_H_ | 5 #ifndef UI_ACCESSIBILITY_AX_TREE_H_ |
6 #define UI_ACCESSIBILITY_AX_TREE_H_ | 6 #define UI_ACCESSIBILITY_AX_TREE_H_ |
7 | 7 |
| 8 #include <stdint.h> |
| 9 |
8 #include <set> | 10 #include <set> |
9 | 11 |
10 #include "base/containers/hash_tables.h" | 12 #include "base/containers/hash_tables.h" |
11 #include "ui/accessibility/ax_export.h" | 13 #include "ui/accessibility/ax_export.h" |
12 #include "ui/accessibility/ax_node_data.h" | 14 #include "ui/accessibility/ax_node_data.h" |
13 #include "ui/accessibility/ax_tree_data.h" | 15 #include "ui/accessibility/ax_tree_data.h" |
14 #include "ui/accessibility/ax_tree_update.h" | 16 #include "ui/accessibility/ax_tree_update.h" |
15 | 17 |
16 namespace ui { | 18 namespace ui { |
17 | 19 |
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96 explicit AXTree(const AXTreeUpdate& initial_state); | 98 explicit AXTree(const AXTreeUpdate& initial_state); |
97 virtual ~AXTree(); | 99 virtual ~AXTree(); |
98 | 100 |
99 virtual void SetDelegate(AXTreeDelegate* delegate); | 101 virtual void SetDelegate(AXTreeDelegate* delegate); |
100 | 102 |
101 AXNode* root() const { return root_; } | 103 AXNode* root() const { return root_; } |
102 | 104 |
103 const AXTreeData& data() const { return data_; } | 105 const AXTreeData& data() const { return data_; } |
104 | 106 |
105 // Returns the AXNode with the given |id| if it is part of this AXTree. | 107 // Returns the AXNode with the given |id| if it is part of this AXTree. |
106 AXNode* GetFromId(int32 id) const; | 108 AXNode* GetFromId(int32_t id) const; |
107 | 109 |
108 // Returns true on success. If it returns false, it's a fatal error | 110 // Returns true on success. If it returns false, it's a fatal error |
109 // and this tree should be destroyed, and the source of the tree update | 111 // and this tree should be destroyed, and the source of the tree update |
110 // should not be trusted any longer. | 112 // should not be trusted any longer. |
111 virtual bool Unserialize(const AXTreeUpdate& update); | 113 virtual bool Unserialize(const AXTreeUpdate& update); |
112 | 114 |
113 virtual void UpdateData(const AXTreeData& data); | 115 virtual void UpdateData(const AXTreeData& data); |
114 | 116 |
115 // Return a multi-line indented string representation, for logging. | 117 // Return a multi-line indented string representation, for logging. |
116 std::string ToString() const; | 118 std::string ToString() const; |
117 | 119 |
118 // A string describing the error from an unsuccessful Unserialize, | 120 // A string describing the error from an unsuccessful Unserialize, |
119 // for testing and debugging. | 121 // for testing and debugging. |
120 const std::string& error() const { return error_; } | 122 const std::string& error() const { return error_; } |
121 | 123 |
122 int size() { return static_cast<int>(id_map_.size()); } | 124 int size() { return static_cast<int>(id_map_.size()); } |
123 | 125 |
124 private: | 126 private: |
125 AXNode* CreateNode(AXNode* parent, int32 id, int32 index_in_parent); | 127 AXNode* CreateNode(AXNode* parent, int32_t id, int32_t index_in_parent); |
126 | 128 |
127 // This is called from within Unserialize(), it returns true on success. | 129 // This is called from within Unserialize(), it returns true on success. |
128 bool UpdateNode(const AXNodeData& src, AXTreeUpdateState* update_state); | 130 bool UpdateNode(const AXNodeData& src, AXTreeUpdateState* update_state); |
129 | 131 |
130 void OnRootChanged(); | 132 void OnRootChanged(); |
131 | 133 |
132 // Notify the delegate that the subtree rooted at |node| will be destroyed, | 134 // Notify the delegate that the subtree rooted at |node| will be destroyed, |
133 // then call DestroyNodeAndSubtree on it. | 135 // then call DestroyNodeAndSubtree on it. |
134 void DestroySubtree(AXNode* node, AXTreeUpdateState* update_state); | 136 void DestroySubtree(AXNode* node, AXTreeUpdateState* update_state); |
135 | 137 |
136 // Call Destroy() on |node|, and delete it from the id map, and then | 138 // Call Destroy() on |node|, and delete it from the id map, and then |
137 // call recursively on all nodes in its subtree. | 139 // call recursively on all nodes in its subtree. |
138 void DestroyNodeAndSubtree(AXNode* node, AXTreeUpdateState* update_state); | 140 void DestroyNodeAndSubtree(AXNode* node, AXTreeUpdateState* update_state); |
139 | 141 |
140 // Iterate over the children of |node| and for each child, destroy the | 142 // Iterate over the children of |node| and for each child, destroy the |
141 // child and its subtree if its id is not in |new_child_ids|. Returns | 143 // child and its subtree if its id is not in |new_child_ids|. Returns |
142 // true on success, false on fatal error. | 144 // true on success, false on fatal error. |
143 bool DeleteOldChildren(AXNode* node, | 145 bool DeleteOldChildren(AXNode* node, |
144 const std::vector<int32>& new_child_ids, | 146 const std::vector<int32_t>& new_child_ids, |
145 AXTreeUpdateState* update_state); | 147 AXTreeUpdateState* update_state); |
146 | 148 |
147 // Iterate over |new_child_ids| and populate |new_children| with | 149 // Iterate over |new_child_ids| and populate |new_children| with |
148 // pointers to child nodes, reusing existing nodes already in the tree | 150 // pointers to child nodes, reusing existing nodes already in the tree |
149 // if they exist, and creating otherwise. Reparenting is disallowed, so | 151 // if they exist, and creating otherwise. Reparenting is disallowed, so |
150 // if the id already exists as the child of another node, that's an | 152 // if the id already exists as the child of another node, that's an |
151 // error. Returns true on success, false on fatal error. | 153 // error. Returns true on success, false on fatal error. |
152 bool CreateNewChildVector(AXNode* node, | 154 bool CreateNewChildVector(AXNode* node, |
153 const std::vector<int32>& new_child_ids, | 155 const std::vector<int32_t>& new_child_ids, |
154 std::vector<AXNode*>* new_children, | 156 std::vector<AXNode*>* new_children, |
155 AXTreeUpdateState* update_state); | 157 AXTreeUpdateState* update_state); |
156 | 158 |
157 AXTreeDelegate* delegate_; | 159 AXTreeDelegate* delegate_; |
158 AXNode* root_; | 160 AXNode* root_; |
159 base::hash_map<int32, AXNode*> id_map_; | 161 base::hash_map<int32_t, AXNode*> id_map_; |
160 std::string error_; | 162 std::string error_; |
161 AXTreeData data_; | 163 AXTreeData data_; |
162 }; | 164 }; |
163 | 165 |
164 } // namespace ui | 166 } // namespace ui |
165 | 167 |
166 #endif // UI_ACCESSIBILITY_AX_TREE_H_ | 168 #endif // UI_ACCESSIBILITY_AX_TREE_H_ |
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