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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 #include "content/browser/accessibility/browser_accessibility_gtk.h" | |
6 | |
7 #include "base/utf_string_conversions.h" | |
8 #include "content/browser/accessibility/browser_accessibility_manager_gtk.h" | |
9 #include "content/common/accessibility_messages.h" | |
10 | |
11 #include <gtk/gtk.h> | |
12 | |
13 using webkit_glue::WebAccessibility; | |
14 | |
15 // The maximum length of an autogenerated unique type name string, | |
16 // generated from the 16-bit interface mask from an AtkObject. | |
17 // 30 is enough for the prefix "WAIType" + 5 hex chars (max) */ | |
18 static const int kWAITypeNameLen = 30; | |
19 | |
20 static gpointer browser_accessibility_parent_class = NULL; | |
21 | |
22 static BrowserAccessibilityGtk* ToBrowserAccessibilityGtk( | |
23 BrowserAccessibilityAtk* atk_object) { | |
24 if (!atk_object) | |
25 return NULL; | |
26 | |
27 return atk_object->m_object; | |
28 } | |
29 | |
30 static BrowserAccessibilityGtk* ToBrowserAccessibilityGtk( | |
31 AtkObject* atk_object) { | |
32 if (!IS_BROWSER_ACCESSIBILITY(atk_object)) | |
33 return NULL; | |
34 | |
35 return ToBrowserAccessibilityGtk(BROWSER_ACCESSIBILITY(atk_object)); | |
36 } | |
37 | |
38 static const gchar* browser_accessibility_get_name(AtkObject* atk_object) { | |
39 BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object); | |
40 return obj->atk_acc_name().c_str(); | |
41 } | |
42 | |
43 static const gchar* browser_accessibility_get_description( | |
44 AtkObject* atk_object) { | |
45 BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object); | |
46 string16 description; | |
47 obj->GetStringAttribute(WebAccessibility::ATTR_DESCRIPTION, &description); | |
48 return UTF16ToUTF8(description).c_str(); | |
49 } | |
50 | |
51 static AtkObject* browser_accessibility_get_parent(AtkObject* atk_object) { | |
52 BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object); | |
53 if (obj->parent()) | |
54 return obj->parent()->ToBrowserAccessibilityGtk()->GetAtkObject(); | |
55 else | |
56 return gtk_widget_get_accessible(obj->manager()->GetParentView()); | |
57 } | |
58 | |
59 static gint browser_accessibility_get_n_children(AtkObject* atk_object) { | |
60 BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object); | |
61 return obj->children().size(); | |
62 } | |
63 | |
64 static AtkObject* browser_accessibility_ref_child( | |
65 AtkObject* atk_object, gint index) { | |
66 BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object); | |
67 AtkObject* result = | |
68 obj->children()[index]->ToBrowserAccessibilityGtk()->GetAtkObject(); | |
69 g_object_ref(result); | |
70 return result; | |
71 } | |
72 | |
73 static gint browser_accessibility_get_index_in_parent(AtkObject* atk_object) { | |
74 BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object); | |
75 return obj->index_in_parent(); | |
76 } | |
77 | |
78 static AtkAttributeSet* browser_accessibility_get_attributes( | |
79 AtkObject* atk_object) { | |
80 return NULL; | |
81 } | |
82 | |
83 static AtkRole browser_accessibility_get_role(AtkObject* atk_object) { | |
84 BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object); | |
85 return obj->atk_role(); | |
86 } | |
87 | |
88 static AtkStateSet* browser_accessibility_ref_state_set(AtkObject* atk_object) { | |
89 BrowserAccessibilityGtk* obj = ToBrowserAccessibilityGtk(atk_object); | |
90 AtkStateSet* state_set = | |
91 ATK_OBJECT_CLASS(browser_accessibility_parent_class)-> | |
92 ref_state_set(atk_object); | |
93 int32 state = obj->state(); | |
94 | |
95 if ((state >> WebAccessibility::STATE_FOCUSABLE) & 1) | |
96 atk_state_set_add_state(state_set, ATK_STATE_FOCUSABLE); | |
97 if (obj->manager()->GetFocus(NULL) == obj) | |
98 atk_state_set_add_state(state_set, ATK_STATE_FOCUSED); | |
99 | |
100 return state_set; | |
101 } | |
102 | |
103 static AtkRelationSet* browser_accessibility_ref_relation_set( | |
104 AtkObject* atk_object) { | |
105 AtkRelationSet* relation_set = | |
106 ATK_OBJECT_CLASS(browser_accessibility_parent_class) | |
107 ->ref_relation_set(atk_object); | |
108 return relation_set; | |
109 } | |
110 | |
111 static void browser_accessibility_init(AtkObject* atk_object, gpointer data) { | |
112 if (ATK_OBJECT_CLASS(browser_accessibility_parent_class)->initialize) { | |
113 ATK_OBJECT_CLASS(browser_accessibility_parent_class)->initialize( | |
114 atk_object, data); | |
115 } | |
116 | |
117 BROWSER_ACCESSIBILITY(atk_object)->m_object = | |
118 reinterpret_cast<BrowserAccessibilityGtk*>(data); | |
119 } | |
120 | |
121 static void browser_accessibility_finalize(GObject* atk_object) { | |
122 G_OBJECT_CLASS(browser_accessibility_parent_class)->finalize(atk_object); | |
123 } | |
124 | |
125 static void browser_accessibility_class_init(AtkObjectClass* klass) { | |
126 GObjectClass* gobject_class = G_OBJECT_CLASS(klass); | |
127 browser_accessibility_parent_class = g_type_class_peek_parent(klass); | |
128 | |
129 gobject_class->finalize = browser_accessibility_finalize; | |
130 klass->initialize = browser_accessibility_init; | |
131 klass->get_name = browser_accessibility_get_name; | |
132 klass->get_description = browser_accessibility_get_description; | |
133 klass->get_parent = browser_accessibility_get_parent; | |
134 klass->get_n_children = browser_accessibility_get_n_children; | |
135 klass->ref_child = browser_accessibility_ref_child; | |
136 klass->get_role = browser_accessibility_get_role; | |
137 klass->ref_state_set = browser_accessibility_ref_state_set; | |
138 klass->get_index_in_parent = browser_accessibility_get_index_in_parent; | |
139 klass->get_attributes = browser_accessibility_get_attributes; | |
140 klass->ref_relation_set = browser_accessibility_ref_relation_set; | |
141 } | |
142 | |
143 GType browser_accessibility_get_type() { | |
144 static volatile gsize type_volatile = 0; | |
145 | |
146 if (g_once_init_enter(&type_volatile)) { | |
147 static const GTypeInfo tinfo = { | |
148 sizeof(BrowserAccessibilityAtkClass), | |
149 (GBaseInitFunc) 0, | |
150 (GBaseFinalizeFunc) 0, | |
151 (GClassInitFunc) browser_accessibility_class_init, | |
152 (GClassFinalizeFunc) 0, | |
153 0, /* class data */ | |
154 sizeof(BrowserAccessibilityAtk), /* instance size */ | |
155 0, /* nb preallocs */ | |
156 (GInstanceInitFunc) 0, | |
157 0 /* value table */ | |
158 }; | |
159 | |
160 GType type = g_type_register_static( | |
161 ATK_TYPE_OBJECT, "BrowserAccessibility", &tinfo, GTypeFlags(0)); | |
162 g_once_init_leave(&type_volatile, type); | |
163 } | |
164 | |
165 return type_volatile; | |
166 } | |
167 | |
168 static guint16 GetInterfaceMaskFromObject(BrowserAccessibilityGtk* obj) { | |
169 return 0; | |
170 } | |
171 | |
172 static const char* GetUniqueAccessibilityTypeName(guint16 interface_mask) | |
173 { | |
174 static char name[kWAITypeNameLen + 1]; | |
175 | |
176 sprintf(name, "WAIType%x", interface_mask); | |
177 name[kWAITypeNameLen] = '\0'; | |
178 | |
179 return name; | |
180 } | |
181 | |
182 static const GInterfaceInfo AtkInterfacesInitFunctions[] = { | |
183 }; | |
184 | |
185 enum WAIType { | |
186 WAI_ACTION, | |
187 WAI_SELECTION, | |
188 WAI_EDITABLE_TEXT, | |
189 WAI_TEXT, | |
190 WAI_COMPONENT, | |
191 WAI_IMAGE, | |
192 WAI_TABLE, | |
193 WAI_HYPERTEXT, | |
194 WAI_HYPERLINK, | |
195 WAI_DOCUMENT, | |
196 WAI_VALUE, | |
197 }; | |
198 | |
199 static GType GetAtkInterfaceTypeFromWAIType(WAIType type) { | |
200 switch (type) { | |
201 case WAI_ACTION: | |
202 return ATK_TYPE_ACTION; | |
203 case WAI_SELECTION: | |
204 return ATK_TYPE_SELECTION; | |
205 case WAI_EDITABLE_TEXT: | |
206 return ATK_TYPE_EDITABLE_TEXT; | |
207 case WAI_TEXT: | |
208 return ATK_TYPE_TEXT; | |
209 case WAI_COMPONENT: | |
210 return ATK_TYPE_COMPONENT; | |
211 case WAI_IMAGE: | |
212 return ATK_TYPE_IMAGE; | |
213 case WAI_TABLE: | |
214 return ATK_TYPE_TABLE; | |
215 case WAI_HYPERTEXT: | |
216 return ATK_TYPE_HYPERTEXT; | |
217 case WAI_HYPERLINK: | |
218 return ATK_TYPE_HYPERLINK_IMPL; | |
219 case WAI_DOCUMENT: | |
220 return ATK_TYPE_DOCUMENT; | |
221 case WAI_VALUE: | |
222 return ATK_TYPE_VALUE; | |
223 } | |
224 | |
225 return G_TYPE_INVALID; | |
226 } | |
227 | |
228 static GType GetAccessibilityTypeFromObject(BrowserAccessibilityGtk* obj) { | |
229 static const GTypeInfo type_info = { | |
230 sizeof(BrowserAccessibilityAtkClass), | |
231 (GBaseInitFunc) 0, | |
232 (GBaseFinalizeFunc) 0, | |
233 (GClassInitFunc) 0, | |
234 (GClassFinalizeFunc) 0, | |
235 0, /* class data */ | |
236 sizeof(BrowserAccessibilityAtk), /* instance size */ | |
237 0, /* nb preallocs */ | |
238 (GInstanceInitFunc) 0, | |
239 0 /* value table */ | |
240 }; | |
241 | |
242 guint16 interface_mask = GetInterfaceMaskFromObject(obj); | |
243 const char* atk_type_name = GetUniqueAccessibilityTypeName(interface_mask); | |
244 GType type = g_type_from_name(atk_type_name); | |
245 if (type) | |
246 return type; | |
247 | |
248 type = g_type_register_static(BROWSER_ACCESSIBILITY_TYPE, | |
249 atk_type_name, | |
250 &type_info, | |
251 GTypeFlags(0)); | |
252 for (guint i = 0; i < G_N_ELEMENTS(AtkInterfacesInitFunctions); i++) { | |
253 if (interface_mask & (1 << i)) { | |
254 g_type_add_interface_static( | |
255 type, | |
256 GetAtkInterfaceTypeFromWAIType(static_cast<WAIType>(i)), | |
257 &AtkInterfacesInitFunctions[i]); | |
258 } | |
259 } | |
260 | |
261 return type; | |
262 } | |
263 | |
264 BrowserAccessibilityAtk* browser_accessibility_new( | |
265 BrowserAccessibilityGtk* obj) { | |
266 GType type = GetAccessibilityTypeFromObject(obj); | |
267 AtkObject* atk_object = static_cast<AtkObject*>(g_object_new(type, 0)); | |
268 | |
269 atk_object_initialize(atk_object, obj); | |
270 | |
271 return BROWSER_ACCESSIBILITY(atk_object); | |
272 } | |
273 | |
274 void browser_accessibility_detach(BrowserAccessibilityAtk* atk_object) { | |
275 } | |
276 | |
277 // static | |
278 BrowserAccessibility* BrowserAccessibility::Create() { | |
279 return new BrowserAccessibilityGtk(); | |
280 } | |
281 | |
282 BrowserAccessibilityGtk::BrowserAccessibilityGtk() { | |
283 atk_object_ = ATK_OBJECT(browser_accessibility_new(this)); | |
284 } | |
285 | |
286 BrowserAccessibilityGtk::~BrowserAccessibilityGtk() { | |
287 browser_accessibility_detach(BROWSER_ACCESSIBILITY(atk_object_)); | |
288 } | |
289 | |
290 BrowserAccessibilityGtk* BrowserAccessibilityGtk::ToBrowserAccessibilityGtk() { | |
291 return this; | |
292 } | |
293 | |
294 AtkObject* BrowserAccessibilityGtk::GetAtkObject() const { | |
295 if (!G_IS_OBJECT(atk_object_)) | |
296 return NULL; | |
297 return atk_object_; | |
298 } | |
299 | |
300 void BrowserAccessibilityGtk::PreInitialize() { | |
301 BrowserAccessibility::PreInitialize(); | |
302 InitRoleAndState(); | |
303 | |
304 if (this->parent()) { | |
305 atk_object_set_parent( | |
306 atk_object_, | |
307 this->parent()->ToBrowserAccessibilityGtk()->GetAtkObject()); | |
308 } | |
309 } | |
310 | |
311 void BrowserAccessibilityGtk::InitRoleAndState() { | |
312 atk_acc_name_ = UTF16ToUTF8(name()).c_str(); | |
313 | |
314 switch(role_) { | |
315 case WebAccessibility::ROLE_BUTTON: | |
316 atk_role_ = ATK_ROLE_PUSH_BUTTON; | |
317 break; | |
318 case WebAccessibility::ROLE_CHECKBOX: | |
319 atk_role_ = ATK_ROLE_CHECK_BOX; | |
320 break; | |
321 case WebAccessibility::ROLE_COMBO_BOX: | |
322 atk_role_ = ATK_ROLE_COMBO_BOX; | |
323 break; | |
324 case WebAccessibility::ROLE_LINK: | |
325 atk_role_ = ATK_ROLE_LINK; | |
326 break; | |
327 case WebAccessibility::ROLE_RADIO_BUTTON: | |
328 atk_role_ = ATK_ROLE_RADIO_BUTTON; | |
329 break; | |
330 case WebAccessibility::ROLE_TEXTAREA: | |
331 atk_role_ = ATK_ROLE_ENTRY; | |
332 break; | |
333 case WebAccessibility::ROLE_TEXT_FIELD: | |
334 atk_role_ = ATK_ROLE_ENTRY; | |
335 break; | |
336 case WebAccessibility::ROLE_WEBCORE_LINK: | |
337 atk_role_ = ATK_ROLE_LINK; | |
338 break; | |
339 default: | |
340 atk_role_ = ATK_ROLE_UNKNOWN; | |
341 break; | |
342 } | |
343 } | |
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