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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 static gpointer browser_accessibility_parent_class = NULL; | |
16 | |
17 static BrowserAccessibilityGtk* toBrowserAccessibilityGtk( | |
18 BrowserAccessibilityAtk* atk_object) { | |
19 if (!atk_object) | |
20 return NULL; | |
21 | |
22 return atk_object->m_object; | |
23 } | |
24 | |
25 static BrowserAccessibilityGtk* toBrowserAccessibilityGtk( | |
26 AtkObject* atk_object) { | |
27 if (!IS_BROWSER_ACCESSIBILITY(atk_object)) | |
28 return NULL; | |
29 | |
30 return toBrowserAccessibilityGtk(BROWSER_ACCESSIBILITY(atk_object)); | |
31 } | |
32 | |
33 static const gchar* browser_accessibility_get_name(AtkObject* atk_object) { | |
34 BrowserAccessibilityGtk* obj = toBrowserAccessibilityGtk(atk_object); | |
35 return obj->atk_acc_name().c_str(); | |
36 } | |
37 | |
38 static const gchar* browser_accessibility_get_description( | |
39 AtkObject* atk_object) { | |
40 BrowserAccessibilityGtk* obj = toBrowserAccessibilityGtk(atk_object); | |
41 string16 description; | |
42 obj->GetStringAttribute(WebAccessibility::ATTR_DESCRIPTION, &description); | |
43 return UTF16ToUTF8(description).c_str(); | |
44 } | |
45 | |
46 static AtkObject* browser_accessibility_get_parent(AtkObject* atk_object) { | |
47 BrowserAccessibilityGtk* obj = toBrowserAccessibilityGtk(atk_object); | |
48 if (obj->parent()) | |
49 return obj->parent()->toBrowserAccessibilityGtk()->GetAtkObject(); | |
50 else | |
51 return gtk_widget_get_accessible(obj->manager()->GetParentView()); | |
52 } | |
53 | |
54 static gint browser_accessibility_get_n_children(AtkObject* atk_object) { | |
55 BrowserAccessibilityGtk* obj = toBrowserAccessibilityGtk(atk_object); | |
56 return obj->children().size(); | |
57 } | |
58 | |
59 static AtkObject* browser_accessibility_ref_child( | |
60 AtkObject* atk_object, gint index) { | |
61 BrowserAccessibilityGtk* obj = toBrowserAccessibilityGtk(atk_object); | |
62 AtkObject* result = | |
63 obj->children()[index]->toBrowserAccessibilityGtk()->GetAtkObject(); | |
64 g_object_ref(result); | |
65 return result; | |
66 } | |
67 | |
68 static gint browser_accessibility_get_index_in_parent(AtkObject* atk_object) { | |
69 BrowserAccessibilityGtk* obj = toBrowserAccessibilityGtk(atk_object); | |
70 return obj->index_in_parent(); | |
71 } | |
72 | |
73 static AtkAttributeSet* browser_accessibility_get_attributes( | |
74 AtkObject* atk_object) { | |
75 return NULL; | |
76 } | |
77 | |
78 static AtkRole browser_accessibility_get_role(AtkObject* atk_object) { | |
79 BrowserAccessibilityGtk* obj = toBrowserAccessibilityGtk(atk_object); | |
80 return obj->atk_role(); | |
81 } | |
82 | |
83 static AtkStateSet* browser_accessibility_ref_state_set(AtkObject* atk_object) { | |
84 BrowserAccessibilityGtk* obj = toBrowserAccessibilityGtk(atk_object); | |
85 AtkStateSet* state_set = ATK_OBJECT_CLASS(browser_accessibility_parent_class) | |
86 ->ref_state_set(atk_object); | |
Evan Stade
2012/05/02 00:03:30
-> at end of previous line
dmazzoni
2012/05/02 06:27:33
Done.
| |
87 int32 state = obj->state(); | |
88 | |
89 if ((state >> WebAccessibility::STATE_FOCUSABLE) & 1) | |
90 atk_state_set_add_state(state_set, ATK_STATE_FOCUSABLE); | |
91 if (obj->manager()->GetFocus(NULL) == obj) | |
92 atk_state_set_add_state(state_set, ATK_STATE_FOCUSED); | |
93 | |
94 return state_set; | |
95 } | |
96 | |
97 static AtkRelationSet* browser_accessibility_ref_relation_set( | |
98 AtkObject* atk_object) { | |
99 AtkRelationSet* relation_set = | |
100 ATK_OBJECT_CLASS(browser_accessibility_parent_class) | |
101 ->ref_relation_set(atk_object); | |
102 return relation_set; | |
103 } | |
104 | |
105 static void browser_accessibility_init(AtkObject* atk_object, gpointer data) { | |
106 if (ATK_OBJECT_CLASS(browser_accessibility_parent_class)->initialize) { | |
107 ATK_OBJECT_CLASS(browser_accessibility_parent_class)->initialize( | |
108 atk_object, data); | |
109 } | |
110 | |
111 BROWSER_ACCESSIBILITY(atk_object)->m_object = | |
112 reinterpret_cast<BrowserAccessibilityGtk*>(data); | |
113 } | |
114 | |
115 static void browser_accessibility_finalize(GObject* atk_object) { | |
116 G_OBJECT_CLASS(browser_accessibility_parent_class)->finalize(atk_object); | |
117 } | |
118 | |
119 static void browser_accessibility_class_init(AtkObjectClass* klass) { | |
120 GObjectClass* gobject_class = G_OBJECT_CLASS(klass); | |
121 browser_accessibility_parent_class = g_type_class_peek_parent(klass); | |
122 | |
123 gobject_class->finalize = browser_accessibility_finalize; | |
124 klass->initialize = browser_accessibility_init; | |
125 klass->get_name = browser_accessibility_get_name; | |
126 klass->get_description = browser_accessibility_get_description; | |
127 klass->get_parent = browser_accessibility_get_parent; | |
128 klass->get_n_children = browser_accessibility_get_n_children; | |
129 klass->ref_child = browser_accessibility_ref_child; | |
130 klass->get_role = browser_accessibility_get_role; | |
131 klass->ref_state_set = browser_accessibility_ref_state_set; | |
132 klass->get_index_in_parent = browser_accessibility_get_index_in_parent; | |
133 klass->get_attributes = browser_accessibility_get_attributes; | |
134 klass->ref_relation_set = browser_accessibility_ref_relation_set; | |
135 } | |
136 | |
137 GType browser_accessibility_get_type() { | |
138 static volatile gsize type_volatile = 0; | |
139 | |
140 if (g_once_init_enter(&type_volatile)) { | |
141 static const GTypeInfo tinfo = { | |
142 sizeof(BrowserAccessibilityAtkClass), | |
143 (GBaseInitFunc) 0, | |
144 (GBaseFinalizeFunc) 0, | |
145 (GClassInitFunc) browser_accessibility_class_init, | |
146 (GClassFinalizeFunc) 0, | |
147 0, /* class data */ | |
148 sizeof(BrowserAccessibilityAtk), /* instance size */ | |
149 0, /* nb preallocs */ | |
150 (GInstanceInitFunc) 0, | |
151 0 /* value table */ | |
152 }; | |
153 | |
154 GType type = g_type_register_static( | |
155 ATK_TYPE_OBJECT, "BrowserAccessibility", &tinfo, GTypeFlags(0)); | |
156 g_once_init_leave(&type_volatile, type); | |
157 } | |
158 | |
159 return type_volatile; | |
160 } | |
161 | |
162 static guint16 GetInterfaceMaskFromObject(BrowserAccessibilityGtk* obj) { | |
163 return 0; | |
164 } | |
165 | |
166 static const char* GetUniqueAccessibilityTypeName(guint16 interface_mask) | |
167 { | |
168 #define WAI_TYPE_NAME_LEN (30) /* Enough for prefix + 5 hex chars (max) */ | |
Evan Stade
2012/05/02 00:03:30
you can ask someone else if you like, but I don't
dmazzoni
2012/05/02 06:27:33
Done. Moved to top and made a static const int.
| |
169 static char name[WAI_TYPE_NAME_LEN + 1]; | |
170 | |
171 sprintf(name, "WAIType%x", interface_mask); | |
172 name[WAI_TYPE_NAME_LEN] = '\0'; | |
173 | |
174 return name; | |
175 } | |
176 | |
177 static const GInterfaceInfo AtkInterfacesInitFunctions[] = { | |
178 }; | |
179 | |
180 enum WAIType { | |
181 WAI_ACTION, | |
182 WAI_SELECTION, | |
183 WAI_EDITABLE_TEXT, | |
184 WAI_TEXT, | |
185 WAI_COMPONENT, | |
186 WAI_IMAGE, | |
187 WAI_TABLE, | |
188 WAI_HYPERTEXT, | |
189 WAI_HYPERLINK, | |
190 WAI_DOCUMENT, | |
191 WAI_VALUE, | |
192 }; | |
193 | |
194 static GType GetAtkInterfaceTypeFromWAIType(WAIType type) { | |
195 switch (type) { | |
196 case WAI_ACTION: | |
197 return ATK_TYPE_ACTION; | |
198 case WAI_SELECTION: | |
199 return ATK_TYPE_SELECTION; | |
200 case WAI_EDITABLE_TEXT: | |
201 return ATK_TYPE_EDITABLE_TEXT; | |
202 case WAI_TEXT: | |
203 return ATK_TYPE_TEXT; | |
204 case WAI_COMPONENT: | |
205 return ATK_TYPE_COMPONENT; | |
206 case WAI_IMAGE: | |
207 return ATK_TYPE_IMAGE; | |
208 case WAI_TABLE: | |
209 return ATK_TYPE_TABLE; | |
210 case WAI_HYPERTEXT: | |
211 return ATK_TYPE_HYPERTEXT; | |
212 case WAI_HYPERLINK: | |
213 return ATK_TYPE_HYPERLINK_IMPL; | |
214 case WAI_DOCUMENT: | |
215 return ATK_TYPE_DOCUMENT; | |
216 case WAI_VALUE: | |
217 return ATK_TYPE_VALUE; | |
218 } | |
219 | |
220 return G_TYPE_INVALID; | |
221 } | |
222 | |
223 static GType GetAccessibilityTypeFromObject(BrowserAccessibilityGtk* obj) { | |
224 static const GTypeInfo type_info = { | |
225 sizeof(BrowserAccessibilityAtkClass), | |
226 (GBaseInitFunc) 0, | |
227 (GBaseFinalizeFunc) 0, | |
228 (GClassInitFunc) 0, | |
229 (GClassFinalizeFunc) 0, | |
230 0, /* class data */ | |
231 sizeof(BrowserAccessibilityAtk), /* instance size */ | |
232 0, /* nb preallocs */ | |
233 (GInstanceInitFunc) 0, | |
234 0 /* value table */ | |
235 }; | |
236 | |
237 guint16 interface_mask = GetInterfaceMaskFromObject(obj); | |
238 const char* atk_type_name = GetUniqueAccessibilityTypeName(interface_mask); | |
239 GType type = g_type_from_name(atk_type_name); | |
240 if (type) | |
241 return type; | |
242 | |
243 type = g_type_register_static(BROWSER_ACCESSIBILITY_TYPE, | |
244 atk_type_name, | |
245 &type_info, | |
246 GTypeFlags(0)); | |
247 for (guint i = 0; i < G_N_ELEMENTS(AtkInterfacesInitFunctions); i++) { | |
248 if (interface_mask & (1 << i)) { | |
249 g_type_add_interface_static( | |
250 type, | |
251 GetAtkInterfaceTypeFromWAIType(static_cast<WAIType>(i)), | |
252 &AtkInterfacesInitFunctions[i]); | |
253 } | |
254 } | |
255 | |
256 return type; | |
257 } | |
258 | |
259 BrowserAccessibilityAtk* browser_accessibility_new( | |
260 BrowserAccessibilityGtk* obj) { | |
261 GType type = GetAccessibilityTypeFromObject(obj); | |
262 AtkObject* atk_object = static_cast<AtkObject*>(g_object_new(type, 0)); | |
263 | |
264 atk_object_initialize(atk_object, obj); | |
265 | |
266 return BROWSER_ACCESSIBILITY(atk_object); | |
267 } | |
268 | |
269 void browser_accessibility_detach(BrowserAccessibilityAtk* atk_object) { | |
270 } | |
271 | |
272 // static | |
273 BrowserAccessibility* BrowserAccessibility::Create() { | |
274 return new BrowserAccessibilityGtk(); | |
275 } | |
276 | |
277 BrowserAccessibilityGtk* BrowserAccessibility::toBrowserAccessibilityGtk() { | |
278 return static_cast<BrowserAccessibilityGtk*>(this); | |
279 } | |
280 | |
281 BrowserAccessibilityGtk::BrowserAccessibilityGtk() { | |
282 atk_object_ = ATK_OBJECT(browser_accessibility_new(this)); | |
283 } | |
284 | |
285 BrowserAccessibilityGtk::~BrowserAccessibilityGtk() { | |
286 browser_accessibility_detach(BROWSER_ACCESSIBILITY(atk_object_)); | |
287 } | |
288 | |
289 AtkObject* BrowserAccessibilityGtk::GetAtkObject() const { | |
290 if (!G_IS_OBJECT(atk_object_)) | |
291 return NULL; | |
292 return atk_object_; | |
293 } | |
294 | |
295 void BrowserAccessibilityGtk::PreInitialize() { | |
296 BrowserAccessibility::PreInitialize(); | |
297 InitRoleAndState(); | |
298 | |
299 if (this->parent()) { | |
300 atk_object_set_parent( | |
301 atk_object_, | |
302 this->parent()->toBrowserAccessibilityGtk()->GetAtkObject()); | |
303 } | |
304 } | |
305 | |
306 void BrowserAccessibilityGtk::InitRoleAndState() { | |
307 atk_acc_name_ = UTF16ToUTF8(name()).c_str(); | |
308 | |
309 switch(role_) { | |
310 case WebAccessibility::ROLE_BUTTON: | |
311 atk_role_ = ATK_ROLE_PUSH_BUTTON; | |
312 break; | |
313 case WebAccessibility::ROLE_CHECKBOX: | |
314 atk_role_ = ATK_ROLE_CHECK_BOX; | |
315 break; | |
316 case WebAccessibility::ROLE_COMBO_BOX: | |
317 atk_role_ = ATK_ROLE_COMBO_BOX; | |
318 break; | |
319 case WebAccessibility::ROLE_LINK: | |
320 atk_role_ = ATK_ROLE_LINK; | |
321 break; | |
322 case WebAccessibility::ROLE_RADIO_BUTTON: | |
323 atk_role_ = ATK_ROLE_RADIO_BUTTON; | |
324 break; | |
325 case WebAccessibility::ROLE_TEXTAREA: | |
326 atk_role_ = ATK_ROLE_ENTRY; | |
327 break; | |
328 case WebAccessibility::ROLE_TEXT_FIELD: | |
329 atk_role_ = ATK_ROLE_ENTRY; | |
330 break; | |
331 case WebAccessibility::ROLE_WEBCORE_LINK: | |
332 atk_role_ = ATK_ROLE_LINK; | |
333 break; | |
334 default: | |
335 atk_role_ = ATK_ROLE_UNKNOWN; | |
336 break; | |
337 } | |
338 } | |
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