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
3 // found in the LICENSE file.
4
5 #include "content/browser/accessibility/browser_accessibility_android.h"
6
7 #include "base/strings/utf_string_conversions.h"
8 #include "content/browser/accessibility/browser_accessibility_manager_android.h"
9 #include "content/common/accessibility_messages.h"
10
11 namespace {
12
13 // These are enums from android.text.InputType in Java:
14 enum {
15 ANDROID_TEXT_INPUTTYPE_TYPE_NULL = 0,
16 ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME = 0x4,
17 ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_DATE = 0x14,
18 ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_TIME = 0x24,
19 ANDROID_TEXT_INPUTTYPE_TYPE_NUMBER = 0x2,
20 ANDROID_TEXT_INPUTTYPE_TYPE_PHONE = 0x3,
21 ANDROID_TEXT_INPUTTYPE_TYPE_TEXT = 0x1,
22 ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_URI = 0x11,
23 ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_EDIT_TEXT = 0xa1,
24 ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_EMAIL = 0xd1,
25 ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_PASSWORD = 0xe1
26 };
27
28 // These are enums from android.view.View in Java:
29 enum {
30 ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_NONE = 0,
31 ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_POLITE = 1,
32 ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_ASSERTIVE = 2
33 };
34
35 // These are enums from
36 // android.view.accessibility.AccessibilityNodeInfo.RangeInfo in Java:
37 enum {
38 ANDROID_VIEW_ACCESSIBILITY_RANGE_TYPE_FLOAT = 1
39 };
40
41 } // namespace
42
43 namespace content {
44
45 // static
Create()46 BrowserAccessibility* BrowserAccessibility::Create() {
47 return new BrowserAccessibilityAndroid();
48 }
49
BrowserAccessibilityAndroid()50 BrowserAccessibilityAndroid::BrowserAccessibilityAndroid() {
51 first_time_ = true;
52 }
53
IsNative() const54 bool BrowserAccessibilityAndroid::IsNative() const {
55 return true;
56 }
57
PlatformIsLeaf() const58 bool BrowserAccessibilityAndroid::PlatformIsLeaf() const {
59 if (InternalChildCount() == 0)
60 return true;
61
62 // Iframes are always allowed to contain children.
63 if (IsIframe() ||
64 GetRole() == ui::AX_ROLE_ROOT_WEB_AREA ||
65 GetRole() == ui::AX_ROLE_WEB_AREA) {
66 return false;
67 }
68
69 // If it has a focusable child, we definitely can't leave out children.
70 if (HasFocusableChild())
71 return false;
72
73 // Headings with text can drop their children.
74 base::string16 name = GetText();
75 if (GetRole() == ui::AX_ROLE_HEADING && !name.empty())
76 return true;
77
78 // Focusable nodes with text can drop their children.
79 if (HasState(ui::AX_STATE_FOCUSABLE) && !name.empty())
80 return true;
81
82 // Nodes with only static text as children can drop their children.
83 if (HasOnlyStaticTextChildren())
84 return true;
85
86 return BrowserAccessibility::PlatformIsLeaf();
87 }
88
IsCheckable() const89 bool BrowserAccessibilityAndroid::IsCheckable() const {
90 bool checkable = false;
91 bool is_aria_pressed_defined;
92 bool is_mixed;
93 GetAriaTristate("aria-pressed", &is_aria_pressed_defined, &is_mixed);
94 if (GetRole() == ui::AX_ROLE_CHECK_BOX ||
95 GetRole() == ui::AX_ROLE_RADIO_BUTTON ||
96 is_aria_pressed_defined) {
97 checkable = true;
98 }
99 if (HasState(ui::AX_STATE_CHECKED))
100 checkable = true;
101 return checkable;
102 }
103
IsChecked() const104 bool BrowserAccessibilityAndroid::IsChecked() const {
105 return HasState(ui::AX_STATE_CHECKED);
106 }
107
IsClickable() const108 bool BrowserAccessibilityAndroid::IsClickable() const {
109 return (PlatformIsLeaf() && !GetText().empty());
110 }
111
IsCollection() const112 bool BrowserAccessibilityAndroid::IsCollection() const {
113 return (GetRole() == ui::AX_ROLE_GRID ||
114 GetRole() == ui::AX_ROLE_LIST ||
115 GetRole() == ui::AX_ROLE_LIST_BOX ||
116 GetRole() == ui::AX_ROLE_TABLE ||
117 GetRole() == ui::AX_ROLE_TREE);
118 }
119
IsCollectionItem() const120 bool BrowserAccessibilityAndroid::IsCollectionItem() const {
121 return (GetRole() == ui::AX_ROLE_CELL ||
122 GetRole() == ui::AX_ROLE_COLUMN_HEADER ||
123 GetRole() == ui::AX_ROLE_DESCRIPTION_LIST_TERM ||
124 GetRole() == ui::AX_ROLE_LIST_BOX_OPTION ||
125 GetRole() == ui::AX_ROLE_LIST_ITEM ||
126 GetRole() == ui::AX_ROLE_ROW_HEADER ||
127 GetRole() == ui::AX_ROLE_TREE_ITEM);
128 }
129
IsContentInvalid() const130 bool BrowserAccessibilityAndroid::IsContentInvalid() const {
131 std::string invalid;
132 return GetHtmlAttribute("aria-invalid", &invalid);
133 }
134
IsDismissable() const135 bool BrowserAccessibilityAndroid::IsDismissable() const {
136 return false; // No concept of "dismissable" on the web currently.
137 }
138
IsEnabled() const139 bool BrowserAccessibilityAndroid::IsEnabled() const {
140 return HasState(ui::AX_STATE_ENABLED);
141 }
142
IsFocusable() const143 bool BrowserAccessibilityAndroid::IsFocusable() const {
144 bool focusable = HasState(ui::AX_STATE_FOCUSABLE);
145 if (IsIframe() ||
146 GetRole() == ui::AX_ROLE_WEB_AREA) {
147 focusable = false;
148 }
149 return focusable;
150 }
151
IsFocused() const152 bool BrowserAccessibilityAndroid::IsFocused() const {
153 return manager()->GetFocus(manager()->GetRoot()) == this;
154 }
155
IsHeading() const156 bool BrowserAccessibilityAndroid::IsHeading() const {
157 return (GetRole() == ui::AX_ROLE_COLUMN_HEADER ||
158 GetRole() == ui::AX_ROLE_HEADING ||
159 GetRole() == ui::AX_ROLE_ROW_HEADER);
160 }
161
IsHierarchical() const162 bool BrowserAccessibilityAndroid::IsHierarchical() const {
163 return (GetRole() == ui::AX_ROLE_LIST ||
164 GetRole() == ui::AX_ROLE_TREE);
165 }
166
IsLink() const167 bool BrowserAccessibilityAndroid::IsLink() const {
168 return GetRole() == ui::AX_ROLE_LINK ||
169 GetRole() == ui::AX_ROLE_IMAGE_MAP_LINK;
170 }
171
IsMultiLine() const172 bool BrowserAccessibilityAndroid::IsMultiLine() const {
173 return GetRole() == ui::AX_ROLE_TEXT_AREA;
174 }
175
IsPassword() const176 bool BrowserAccessibilityAndroid::IsPassword() const {
177 return HasState(ui::AX_STATE_PROTECTED);
178 }
179
IsRangeType() const180 bool BrowserAccessibilityAndroid::IsRangeType() const {
181 return (GetRole() == ui::AX_ROLE_PROGRESS_INDICATOR ||
182 GetRole() == ui::AX_ROLE_SCROLL_BAR ||
183 GetRole() == ui::AX_ROLE_SLIDER);
184 }
185
IsScrollable() const186 bool BrowserAccessibilityAndroid::IsScrollable() const {
187 int dummy;
188 return GetIntAttribute(ui::AX_ATTR_SCROLL_X_MAX, &dummy);
189 }
190
IsSelected() const191 bool BrowserAccessibilityAndroid::IsSelected() const {
192 return HasState(ui::AX_STATE_SELECTED);
193 }
194
IsVisibleToUser() const195 bool BrowserAccessibilityAndroid::IsVisibleToUser() const {
196 return !HasState(ui::AX_STATE_INVISIBLE);
197 }
198
CanOpenPopup() const199 bool BrowserAccessibilityAndroid::CanOpenPopup() const {
200 return HasState(ui::AX_STATE_HASPOPUP);
201 }
202
GetClassName() const203 const char* BrowserAccessibilityAndroid::GetClassName() const {
204 const char* class_name = NULL;
205
206 switch(GetRole()) {
207 case ui::AX_ROLE_EDITABLE_TEXT:
208 case ui::AX_ROLE_SPIN_BUTTON:
209 case ui::AX_ROLE_TEXT_AREA:
210 case ui::AX_ROLE_TEXT_FIELD:
211 class_name = "android.widget.EditText";
212 break;
213 case ui::AX_ROLE_SLIDER:
214 class_name = "android.widget.SeekBar";
215 break;
216 case ui::AX_ROLE_COMBO_BOX:
217 class_name = "android.widget.Spinner";
218 break;
219 case ui::AX_ROLE_BUTTON:
220 case ui::AX_ROLE_MENU_BUTTON:
221 case ui::AX_ROLE_POP_UP_BUTTON:
222 class_name = "android.widget.Button";
223 break;
224 case ui::AX_ROLE_CHECK_BOX:
225 class_name = "android.widget.CheckBox";
226 break;
227 case ui::AX_ROLE_RADIO_BUTTON:
228 class_name = "android.widget.RadioButton";
229 break;
230 case ui::AX_ROLE_TOGGLE_BUTTON:
231 class_name = "android.widget.ToggleButton";
232 break;
233 case ui::AX_ROLE_CANVAS:
234 case ui::AX_ROLE_IMAGE:
235 class_name = "android.widget.Image";
236 break;
237 case ui::AX_ROLE_PROGRESS_INDICATOR:
238 class_name = "android.widget.ProgressBar";
239 break;
240 case ui::AX_ROLE_TAB_LIST:
241 class_name = "android.widget.TabWidget";
242 break;
243 case ui::AX_ROLE_GRID:
244 case ui::AX_ROLE_TABLE:
245 class_name = "android.widget.GridView";
246 break;
247 case ui::AX_ROLE_LIST:
248 case ui::AX_ROLE_LIST_BOX:
249 class_name = "android.widget.ListView";
250 break;
251 case ui::AX_ROLE_DIALOG:
252 class_name = "android.app.Dialog";
253 break;
254 case ui::AX_ROLE_ROOT_WEB_AREA:
255 class_name = "android.webkit.WebView";
256 break;
257 default:
258 class_name = "android.view.View";
259 break;
260 }
261
262 return class_name;
263 }
264
GetText() const265 base::string16 BrowserAccessibilityAndroid::GetText() const {
266 if (IsIframe() ||
267 GetRole() == ui::AX_ROLE_WEB_AREA) {
268 return base::string16();
269 }
270
271 // See comment in browser_accessibility_win.cc for details.
272 // The difference here is that we can only expose one accessible
273 // name on Android, not 2 or 3 like on Windows or Mac.
274
275 // First, always return the |value| attribute if this is an
276 // accessible text.
277 if (!value().empty() &&
278 (GetRole() == ui::AX_ROLE_EDITABLE_TEXT ||
279 GetRole() == ui::AX_ROLE_TEXT_AREA ||
280 GetRole() == ui::AX_ROLE_TEXT_FIELD ||
281 HasState(ui::AX_STATE_EDITABLE))) {
282 return base::UTF8ToUTF16(value());
283 }
284
285 // If there's no text value, the basic rule is: prefer description
286 // (aria-labelledby or aria-label), then help (title), then name
287 // (inner text), then value (control value). However, if
288 // title_elem_id is set, that means there's a label element
289 // supplying the name and then name takes precedence over help.
290 // TODO(dmazzoni): clean this up by providing more granular labels in
291 // Blink, making the platform-specific mapping to accessible text simpler.
292 base::string16 description = GetString16Attribute(ui::AX_ATTR_DESCRIPTION);
293 base::string16 help = GetString16Attribute(ui::AX_ATTR_HELP);
294 int title_elem_id = GetIntAttribute(
295 ui::AX_ATTR_TITLE_UI_ELEMENT);
296 base::string16 text;
297 if (!description.empty())
298 text = description;
299 else if (title_elem_id && !name().empty())
300 text = base::UTF8ToUTF16(name());
301 else if (!help.empty())
302 text = help;
303 else if (!name().empty())
304 text = base::UTF8ToUTF16(name());
305 else if (!value().empty())
306 text = base::UTF8ToUTF16(value());
307
308 // This is called from PlatformIsLeaf, so don't call PlatformChildCount
309 // from within this!
310 if (text.empty() && HasOnlyStaticTextChildren()) {
311 for (uint32 i = 0; i < InternalChildCount(); i++) {
312 BrowserAccessibility* child = InternalGetChild(i);
313 text += static_cast<BrowserAccessibilityAndroid*>(child)->GetText();
314 }
315 }
316
317 if (text.empty() && IsLink()) {
318 base::string16 url = GetString16Attribute(ui::AX_ATTR_URL);
319 // Given a url like http://foo.com/bar/baz.png, just return the
320 // base name, e.g., "baz".
321 int trailing_slashes = 0;
322 while (url.size() - trailing_slashes > 0 &&
323 url[url.size() - trailing_slashes - 1] == '/') {
324 trailing_slashes++;
325 }
326 if (trailing_slashes)
327 url = url.substr(0, url.size() - trailing_slashes);
328 size_t slash_index = url.rfind('/');
329 if (slash_index != std::string::npos)
330 url = url.substr(slash_index + 1);
331 size_t dot_index = url.rfind('.');
332 if (dot_index != std::string::npos)
333 url = url.substr(0, dot_index);
334 text = url;
335 }
336
337 return text;
338 }
339
GetItemIndex() const340 int BrowserAccessibilityAndroid::GetItemIndex() const {
341 int index = 0;
342 switch(GetRole()) {
343 case ui::AX_ROLE_LIST_ITEM:
344 case ui::AX_ROLE_LIST_BOX_OPTION:
345 case ui::AX_ROLE_TREE_ITEM:
346 index = GetIndexInParent();
347 break;
348 case ui::AX_ROLE_SLIDER:
349 case ui::AX_ROLE_PROGRESS_INDICATOR: {
350 float value_for_range;
351 if (GetFloatAttribute(
352 ui::AX_ATTR_VALUE_FOR_RANGE, &value_for_range)) {
353 index = static_cast<int>(value_for_range);
354 }
355 break;
356 }
357 }
358 return index;
359 }
360
GetItemCount() const361 int BrowserAccessibilityAndroid::GetItemCount() const {
362 int count = 0;
363 switch(GetRole()) {
364 case ui::AX_ROLE_LIST:
365 case ui::AX_ROLE_LIST_BOX:
366 count = PlatformChildCount();
367 break;
368 case ui::AX_ROLE_SLIDER:
369 case ui::AX_ROLE_PROGRESS_INDICATOR: {
370 float max_value_for_range;
371 if (GetFloatAttribute(ui::AX_ATTR_MAX_VALUE_FOR_RANGE,
372 &max_value_for_range)) {
373 count = static_cast<int>(max_value_for_range);
374 }
375 break;
376 }
377 }
378 return count;
379 }
380
GetScrollX() const381 int BrowserAccessibilityAndroid::GetScrollX() const {
382 int value = 0;
383 GetIntAttribute(ui::AX_ATTR_SCROLL_X, &value);
384 return value;
385 }
386
GetScrollY() const387 int BrowserAccessibilityAndroid::GetScrollY() const {
388 int value = 0;
389 GetIntAttribute(ui::AX_ATTR_SCROLL_Y, &value);
390 return value;
391 }
392
GetMaxScrollX() const393 int BrowserAccessibilityAndroid::GetMaxScrollX() const {
394 int value = 0;
395 GetIntAttribute(ui::AX_ATTR_SCROLL_X_MAX, &value);
396 return value;
397 }
398
GetMaxScrollY() const399 int BrowserAccessibilityAndroid::GetMaxScrollY() const {
400 int value = 0;
401 GetIntAttribute(ui::AX_ATTR_SCROLL_Y_MAX, &value);
402 return value;
403 }
404
GetTextChangeFromIndex() const405 int BrowserAccessibilityAndroid::GetTextChangeFromIndex() const {
406 size_t index = 0;
407 while (index < old_value_.length() &&
408 index < new_value_.length() &&
409 old_value_[index] == new_value_[index]) {
410 index++;
411 }
412 return index;
413 }
414
GetTextChangeAddedCount() const415 int BrowserAccessibilityAndroid::GetTextChangeAddedCount() const {
416 size_t old_len = old_value_.length();
417 size_t new_len = new_value_.length();
418 size_t left = 0;
419 while (left < old_len &&
420 left < new_len &&
421 old_value_[left] == new_value_[left]) {
422 left++;
423 }
424 size_t right = 0;
425 while (right < old_len &&
426 right < new_len &&
427 old_value_[old_len - right - 1] == new_value_[new_len - right - 1]) {
428 right++;
429 }
430 return (new_len - left - right);
431 }
432
GetTextChangeRemovedCount() const433 int BrowserAccessibilityAndroid::GetTextChangeRemovedCount() const {
434 size_t old_len = old_value_.length();
435 size_t new_len = new_value_.length();
436 size_t left = 0;
437 while (left < old_len &&
438 left < new_len &&
439 old_value_[left] == new_value_[left]) {
440 left++;
441 }
442 size_t right = 0;
443 while (right < old_len &&
444 right < new_len &&
445 old_value_[old_len - right - 1] == new_value_[new_len - right - 1]) {
446 right++;
447 }
448 return (old_len - left - right);
449 }
450
GetTextChangeBeforeText() const451 base::string16 BrowserAccessibilityAndroid::GetTextChangeBeforeText() const {
452 return old_value_;
453 }
454
GetSelectionStart() const455 int BrowserAccessibilityAndroid::GetSelectionStart() const {
456 int sel_start = 0;
457 GetIntAttribute(ui::AX_ATTR_TEXT_SEL_START, &sel_start);
458 return sel_start;
459 }
460
GetSelectionEnd() const461 int BrowserAccessibilityAndroid::GetSelectionEnd() const {
462 int sel_end = 0;
463 GetIntAttribute(ui::AX_ATTR_TEXT_SEL_END, &sel_end);
464 return sel_end;
465 }
466
GetEditableTextLength() const467 int BrowserAccessibilityAndroid::GetEditableTextLength() const {
468 return value().length();
469 }
470
AndroidInputType() const471 int BrowserAccessibilityAndroid::AndroidInputType() const {
472 std::string html_tag = GetStringAttribute(
473 ui::AX_ATTR_HTML_TAG);
474 if (html_tag != "input")
475 return ANDROID_TEXT_INPUTTYPE_TYPE_NULL;
476
477 std::string type;
478 if (!GetHtmlAttribute("type", &type))
479 return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT;
480
481 if (type == "" || type == "text" || type == "search")
482 return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT;
483 else if (type == "date")
484 return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_DATE;
485 else if (type == "datetime" || type == "datetime-local")
486 return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME;
487 else if (type == "email")
488 return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_EMAIL;
489 else if (type == "month")
490 return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_DATE;
491 else if (type == "number")
492 return ANDROID_TEXT_INPUTTYPE_TYPE_NUMBER;
493 else if (type == "password")
494 return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_PASSWORD;
495 else if (type == "tel")
496 return ANDROID_TEXT_INPUTTYPE_TYPE_PHONE;
497 else if (type == "time")
498 return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_TIME;
499 else if (type == "url")
500 return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_URI;
501 else if (type == "week")
502 return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME;
503
504 return ANDROID_TEXT_INPUTTYPE_TYPE_NULL;
505 }
506
AndroidLiveRegionType() const507 int BrowserAccessibilityAndroid::AndroidLiveRegionType() const {
508 std::string live = GetStringAttribute(
509 ui::AX_ATTR_LIVE_STATUS);
510 if (live == "polite")
511 return ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_POLITE;
512 else if (live == "assertive")
513 return ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_ASSERTIVE;
514 return ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_NONE;
515 }
516
AndroidRangeType() const517 int BrowserAccessibilityAndroid::AndroidRangeType() const {
518 return ANDROID_VIEW_ACCESSIBILITY_RANGE_TYPE_FLOAT;
519 }
520
RowCount() const521 int BrowserAccessibilityAndroid::RowCount() const {
522 if (GetRole() == ui::AX_ROLE_GRID ||
523 GetRole() == ui::AX_ROLE_TABLE) {
524 return CountChildrenWithRole(ui::AX_ROLE_ROW);
525 }
526
527 if (GetRole() == ui::AX_ROLE_LIST ||
528 GetRole() == ui::AX_ROLE_LIST_BOX ||
529 GetRole() == ui::AX_ROLE_TREE) {
530 return PlatformChildCount();
531 }
532
533 return 0;
534 }
535
ColumnCount() const536 int BrowserAccessibilityAndroid::ColumnCount() const {
537 if (GetRole() == ui::AX_ROLE_GRID ||
538 GetRole() == ui::AX_ROLE_TABLE) {
539 return CountChildrenWithRole(ui::AX_ROLE_COLUMN);
540 }
541 return 0;
542 }
543
RowIndex() const544 int BrowserAccessibilityAndroid::RowIndex() const {
545 if (GetRole() == ui::AX_ROLE_LIST_ITEM ||
546 GetRole() == ui::AX_ROLE_LIST_BOX_OPTION ||
547 GetRole() == ui::AX_ROLE_TREE_ITEM) {
548 return GetIndexInParent();
549 }
550
551 return GetIntAttribute(ui::AX_ATTR_TABLE_CELL_ROW_INDEX);
552 }
553
RowSpan() const554 int BrowserAccessibilityAndroid::RowSpan() const {
555 return GetIntAttribute(ui::AX_ATTR_TABLE_CELL_ROW_SPAN);
556 }
557
ColumnIndex() const558 int BrowserAccessibilityAndroid::ColumnIndex() const {
559 return GetIntAttribute(ui::AX_ATTR_TABLE_CELL_COLUMN_INDEX);
560 }
561
ColumnSpan() const562 int BrowserAccessibilityAndroid::ColumnSpan() const {
563 return GetIntAttribute(ui::AX_ATTR_TABLE_CELL_COLUMN_SPAN);
564 }
565
RangeMin() const566 float BrowserAccessibilityAndroid::RangeMin() const {
567 return GetFloatAttribute(ui::AX_ATTR_MIN_VALUE_FOR_RANGE);
568 }
569
RangeMax() const570 float BrowserAccessibilityAndroid::RangeMax() const {
571 return GetFloatAttribute(ui::AX_ATTR_MAX_VALUE_FOR_RANGE);
572 }
573
RangeCurrentValue() const574 float BrowserAccessibilityAndroid::RangeCurrentValue() const {
575 return GetFloatAttribute(ui::AX_ATTR_VALUE_FOR_RANGE);
576 }
577
HasFocusableChild() const578 bool BrowserAccessibilityAndroid::HasFocusableChild() const {
579 // This is called from PlatformIsLeaf, so don't call PlatformChildCount
580 // from within this!
581 for (uint32 i = 0; i < InternalChildCount(); i++) {
582 BrowserAccessibility* child = InternalGetChild(i);
583 if (child->HasState(ui::AX_STATE_FOCUSABLE))
584 return true;
585 if (static_cast<BrowserAccessibilityAndroid*>(child)->HasFocusableChild())
586 return true;
587 }
588 return false;
589 }
590
HasOnlyStaticTextChildren() const591 bool BrowserAccessibilityAndroid::HasOnlyStaticTextChildren() const {
592 // This is called from PlatformIsLeaf, so don't call PlatformChildCount
593 // from within this!
594 for (uint32 i = 0; i < InternalChildCount(); i++) {
595 BrowserAccessibility* child = InternalGetChild(i);
596 if (child->GetRole() != ui::AX_ROLE_STATIC_TEXT)
597 return false;
598 }
599 return true;
600 }
601
IsIframe() const602 bool BrowserAccessibilityAndroid::IsIframe() const {
603 base::string16 html_tag = GetString16Attribute(
604 ui::AX_ATTR_HTML_TAG);
605 return html_tag == base::ASCIIToUTF16("iframe");
606 }
607
OnDataChanged()608 void BrowserAccessibilityAndroid::OnDataChanged() {
609 BrowserAccessibility::OnDataChanged();
610
611 if (IsEditableText()) {
612 if (base::UTF8ToUTF16(value()) != new_value_) {
613 old_value_ = new_value_;
614 new_value_ = base::UTF8ToUTF16(value());
615 }
616 }
617
618 if (GetRole() == ui::AX_ROLE_ALERT && first_time_)
619 manager()->NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, this);
620
621 base::string16 live;
622 if (GetString16Attribute(
623 ui::AX_ATTR_CONTAINER_LIVE_STATUS, &live)) {
624 NotifyLiveRegionUpdate(live);
625 }
626
627 first_time_ = false;
628 }
629
NotifyLiveRegionUpdate(base::string16 & aria_live)630 void BrowserAccessibilityAndroid::NotifyLiveRegionUpdate(
631 base::string16& aria_live) {
632 if (!EqualsASCII(aria_live, aria_strings::kAriaLivePolite) &&
633 !EqualsASCII(aria_live, aria_strings::kAriaLiveAssertive))
634 return;
635
636 base::string16 text = GetText();
637 if (cached_text_ != text) {
638 if (!text.empty()) {
639 manager()->NotifyAccessibilityEvent(ui::AX_EVENT_SHOW,
640 this);
641 }
642 cached_text_ = text;
643 }
644 }
645
CountChildrenWithRole(ui::AXRole role) const646 int BrowserAccessibilityAndroid::CountChildrenWithRole(ui::AXRole role) const {
647 int count = 0;
648 for (uint32 i = 0; i < PlatformChildCount(); i++) {
649 if (PlatformGetChild(i)->GetRole() == role)
650 count++;
651 }
652 return count;
653 }
654
655 } // namespace content
656
