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.
5 #include "content/browser/accessibility/browser_accessibility_android.h"
7 #include "base/i18n/break_iterator.h"
8 #include "base/strings/string_util.h"
9 #include "base/strings/stringprintf.h"
10 #include "base/strings/utf_string_conversions.h"
11 #include "content/browser/accessibility/browser_accessibility_manager_android.h"
12 #include "content/common/accessibility_messages.h"
16 // These are enums from android.text.InputType in Java:
18 ANDROID_TEXT_INPUTTYPE_TYPE_NULL = 0,
19 ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME = 0x4,
20 ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_DATE = 0x14,
21 ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_TIME = 0x24,
22 ANDROID_TEXT_INPUTTYPE_TYPE_NUMBER = 0x2,
23 ANDROID_TEXT_INPUTTYPE_TYPE_PHONE = 0x3,
24 ANDROID_TEXT_INPUTTYPE_TYPE_TEXT = 0x1,
25 ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_URI = 0x11,
26 ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_EDIT_TEXT = 0xa1,
27 ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_EMAIL = 0xd1,
28 ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_PASSWORD = 0xe1
31 // These are enums from android.view.View in Java:
33 ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_NONE = 0,
34 ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_POLITE = 1,
35 ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_ASSERTIVE = 2
38 // These are enums from
39 // android.view.accessibility.AccessibilityNodeInfo.RangeInfo in Java:
41 ANDROID_VIEW_ACCESSIBILITY_RANGE_TYPE_FLOAT = 1
49 BrowserAccessibility* BrowserAccessibility::Create() {
50 return new BrowserAccessibilityAndroid();
53 BrowserAccessibilityAndroid::BrowserAccessibilityAndroid() {
57 bool BrowserAccessibilityAndroid::IsNative() const {
61 void BrowserAccessibilityAndroid::OnLocationChanged() {
62 manager()->NotifyAccessibilityEvent(ui::AX_EVENT_LOCATION_CHANGED, this);
65 bool BrowserAccessibilityAndroid::PlatformIsLeaf() const {
66 if (InternalChildCount() == 0)
69 // Iframes are always allowed to contain children.
71 GetRole() == ui::AX_ROLE_ROOT_WEB_AREA ||
72 GetRole() == ui::AX_ROLE_WEB_AREA) {
76 // If it has a focusable child, we definitely can't leave out children.
77 if (HasFocusableChild())
80 // Date and time controls should drop their children.
81 if (GetRole() == ui::AX_ROLE_DATE || GetRole() == ui::AX_ROLE_TIME)
84 // Headings with text can drop their children.
85 base::string16 name = GetText();
86 if (GetRole() == ui::AX_ROLE_HEADING && !name.empty())
89 // Focusable nodes with text can drop their children.
90 if (HasState(ui::AX_STATE_FOCUSABLE) && !name.empty())
93 // Nodes with only static text as children can drop their children.
94 if (HasOnlyStaticTextChildren())
97 return BrowserAccessibility::PlatformIsLeaf();
100 bool BrowserAccessibilityAndroid::CanScrollForward() const {
104 float value = GetFloatAttribute(ui::AX_ATTR_VALUE_FOR_RANGE);
105 float max = GetFloatAttribute(ui::AX_ATTR_MAX_VALUE_FOR_RANGE);
109 bool BrowserAccessibilityAndroid::CanScrollBackward() const {
113 float value = GetFloatAttribute(ui::AX_ATTR_VALUE_FOR_RANGE);
114 float min = GetFloatAttribute(ui::AX_ATTR_MIN_VALUE_FOR_RANGE);
118 bool BrowserAccessibilityAndroid::IsCheckable() const {
119 bool checkable = false;
120 bool is_aria_pressed_defined;
122 GetAriaTristate("aria-pressed", &is_aria_pressed_defined, &is_mixed);
123 if (GetRole() == ui::AX_ROLE_CHECK_BOX ||
124 GetRole() == ui::AX_ROLE_RADIO_BUTTON ||
125 GetRole() == ui::AX_ROLE_MENU_ITEM_CHECK_BOX ||
126 GetRole() == ui::AX_ROLE_MENU_ITEM_RADIO ||
127 is_aria_pressed_defined) {
130 if (HasState(ui::AX_STATE_CHECKED))
135 bool BrowserAccessibilityAndroid::IsChecked() const {
136 return HasState(ui::AX_STATE_CHECKED);
139 bool BrowserAccessibilityAndroid::IsClickable() const {
140 return (PlatformIsLeaf() && !GetText().empty());
143 bool BrowserAccessibilityAndroid::IsCollection() const {
144 return (GetRole() == ui::AX_ROLE_GRID ||
145 GetRole() == ui::AX_ROLE_LIST ||
146 GetRole() == ui::AX_ROLE_LIST_BOX ||
147 GetRole() == ui::AX_ROLE_DESCRIPTION_LIST ||
148 GetRole() == ui::AX_ROLE_TABLE ||
149 GetRole() == ui::AX_ROLE_TREE);
152 bool BrowserAccessibilityAndroid::IsCollectionItem() const {
153 return (GetRole() == ui::AX_ROLE_CELL ||
154 GetRole() == ui::AX_ROLE_COLUMN_HEADER ||
155 GetRole() == ui::AX_ROLE_DESCRIPTION_LIST_TERM ||
156 GetRole() == ui::AX_ROLE_LIST_BOX_OPTION ||
157 GetRole() == ui::AX_ROLE_LIST_ITEM ||
158 GetRole() == ui::AX_ROLE_ROW_HEADER ||
159 GetRole() == ui::AX_ROLE_TREE_ITEM);
162 bool BrowserAccessibilityAndroid::IsContentInvalid() const {
164 return GetHtmlAttribute("aria-invalid", &invalid);
167 bool BrowserAccessibilityAndroid::IsDismissable() const {
168 return false; // No concept of "dismissable" on the web currently.
171 bool BrowserAccessibilityAndroid::IsEditableText() const {
172 return (GetRole() == ui::AX_ROLE_EDITABLE_TEXT ||
173 GetRole() == ui::AX_ROLE_TEXT_AREA ||
174 GetRole() == ui::AX_ROLE_TEXT_FIELD);
177 bool BrowserAccessibilityAndroid::IsEnabled() const {
178 return HasState(ui::AX_STATE_ENABLED);
181 bool BrowserAccessibilityAndroid::IsFocusable() const {
182 bool focusable = HasState(ui::AX_STATE_FOCUSABLE);
184 GetRole() == ui::AX_ROLE_WEB_AREA) {
190 bool BrowserAccessibilityAndroid::IsFocused() const {
191 return manager()->GetFocus(manager()->GetRoot()) == this;
194 bool BrowserAccessibilityAndroid::IsHeading() const {
195 return (GetRole() == ui::AX_ROLE_COLUMN_HEADER ||
196 GetRole() == ui::AX_ROLE_HEADING ||
197 GetRole() == ui::AX_ROLE_ROW_HEADER);
200 bool BrowserAccessibilityAndroid::IsHierarchical() const {
201 return (GetRole() == ui::AX_ROLE_LIST ||
202 GetRole() == ui::AX_ROLE_DESCRIPTION_LIST ||
203 GetRole() == ui::AX_ROLE_TREE);
206 bool BrowserAccessibilityAndroid::IsLink() const {
207 return GetRole() == ui::AX_ROLE_LINK ||
208 GetRole() == ui::AX_ROLE_IMAGE_MAP_LINK;
211 bool BrowserAccessibilityAndroid::IsMultiLine() const {
212 return GetRole() == ui::AX_ROLE_TEXT_AREA;
215 bool BrowserAccessibilityAndroid::IsPassword() const {
216 return HasState(ui::AX_STATE_PROTECTED);
219 bool BrowserAccessibilityAndroid::IsRangeType() const {
220 return (GetRole() == ui::AX_ROLE_PROGRESS_INDICATOR ||
221 GetRole() == ui::AX_ROLE_SCROLL_BAR ||
222 GetRole() == ui::AX_ROLE_SLIDER);
225 bool BrowserAccessibilityAndroid::IsScrollable() const {
227 return GetIntAttribute(ui::AX_ATTR_SCROLL_X_MAX, &dummy);
230 bool BrowserAccessibilityAndroid::IsSelected() const {
231 return HasState(ui::AX_STATE_SELECTED);
234 bool BrowserAccessibilityAndroid::IsSlider() const {
235 return GetRole() == ui::AX_ROLE_SLIDER;
238 bool BrowserAccessibilityAndroid::IsVisibleToUser() const {
239 return !HasState(ui::AX_STATE_INVISIBLE);
242 bool BrowserAccessibilityAndroid::CanOpenPopup() const {
243 return HasState(ui::AX_STATE_HASPOPUP);
246 const char* BrowserAccessibilityAndroid::GetClassName() const {
247 const char* class_name = NULL;
250 case ui::AX_ROLE_EDITABLE_TEXT:
251 case ui::AX_ROLE_SPIN_BUTTON:
252 case ui::AX_ROLE_TEXT_AREA:
253 case ui::AX_ROLE_TEXT_FIELD:
254 class_name = "android.widget.EditText";
256 case ui::AX_ROLE_SLIDER:
257 class_name = "android.widget.SeekBar";
259 case ui::AX_ROLE_COLOR_WELL:
260 case ui::AX_ROLE_COMBO_BOX:
261 case ui::AX_ROLE_DATE:
262 case ui::AX_ROLE_POP_UP_BUTTON:
263 case ui::AX_ROLE_TIME:
264 class_name = "android.widget.Spinner";
266 case ui::AX_ROLE_BUTTON:
267 case ui::AX_ROLE_MENU_BUTTON:
268 class_name = "android.widget.Button";
270 case ui::AX_ROLE_CHECK_BOX:
271 class_name = "android.widget.CheckBox";
273 case ui::AX_ROLE_RADIO_BUTTON:
274 class_name = "android.widget.RadioButton";
276 case ui::AX_ROLE_TOGGLE_BUTTON:
277 class_name = "android.widget.ToggleButton";
279 case ui::AX_ROLE_CANVAS:
280 case ui::AX_ROLE_IMAGE:
281 case ui::AX_ROLE_SVG_ROOT:
282 class_name = "android.widget.Image";
284 case ui::AX_ROLE_METER:
285 case ui::AX_ROLE_PROGRESS_INDICATOR:
286 class_name = "android.widget.ProgressBar";
288 case ui::AX_ROLE_TAB_LIST:
289 class_name = "android.widget.TabWidget";
291 case ui::AX_ROLE_GRID:
292 case ui::AX_ROLE_TABLE:
293 class_name = "android.widget.GridView";
295 case ui::AX_ROLE_LIST:
296 case ui::AX_ROLE_LIST_BOX:
297 case ui::AX_ROLE_DESCRIPTION_LIST:
298 class_name = "android.widget.ListView";
300 case ui::AX_ROLE_DIALOG:
301 class_name = "android.app.Dialog";
303 case ui::AX_ROLE_ROOT_WEB_AREA:
304 class_name = "android.webkit.WebView";
306 case ui::AX_ROLE_MENU_ITEM:
307 case ui::AX_ROLE_MENU_ITEM_CHECK_BOX:
308 case ui::AX_ROLE_MENU_ITEM_RADIO:
309 class_name = "android.view.MenuItem";
312 class_name = "android.view.View";
319 base::string16 BrowserAccessibilityAndroid::GetText() const {
321 GetRole() == ui::AX_ROLE_WEB_AREA) {
322 return base::string16();
325 // See comment in browser_accessibility_win.cc for details.
326 // The difference here is that we can only expose one accessible
327 // name on Android, not 2 or 3 like on Windows or Mac.
329 // First, always return the |value| attribute if this is an
331 if (!value().empty()) {
332 if (HasState(ui::AX_STATE_EDITABLE))
333 return base::UTF8ToUTF16(value());
336 case ui::AX_ROLE_COMBO_BOX:
337 case ui::AX_ROLE_EDITABLE_TEXT:
338 case ui::AX_ROLE_POP_UP_BUTTON:
339 case ui::AX_ROLE_TEXT_AREA:
340 case ui::AX_ROLE_TEXT_FIELD:
341 return base::UTF8ToUTF16(value());
345 // For color wells, the color is stored in separate attributes.
346 // Perhaps we could return color names in the future?
347 if (GetRole() == ui::AX_ROLE_COLOR_WELL) {
348 int red = GetIntAttribute(ui::AX_ATTR_COLOR_VALUE_RED);
349 int green = GetIntAttribute(ui::AX_ATTR_COLOR_VALUE_GREEN);
350 int blue = GetIntAttribute(ui::AX_ATTR_COLOR_VALUE_BLUE);
351 return base::UTF8ToUTF16(
352 base::StringPrintf("#%02X%02X%02X", red, green, blue));
355 // Always prefer visible text if this is a link. Sites sometimes add
356 // a "title" attribute to a link with more information, but we can't
357 // lose the link text.
358 if (!name().empty() && GetRole() == ui::AX_ROLE_LINK)
359 return base::UTF8ToUTF16(name());
361 // If there's no text value, the basic rule is: prefer description
362 // (aria-labelledby or aria-label), then help (title), then name
363 // (inner text), then value (control value). However, if
364 // title_elem_id is set, that means there's a label element
365 // supplying the name and then name takes precedence over help.
366 // TODO(dmazzoni): clean this up by providing more granular labels in
367 // Blink, making the platform-specific mapping to accessible text simpler.
368 base::string16 description = GetString16Attribute(ui::AX_ATTR_DESCRIPTION);
369 base::string16 help = GetString16Attribute(ui::AX_ATTR_HELP);
371 base::string16 placeholder;
373 case ui::AX_ROLE_DATE:
374 case ui::AX_ROLE_EDITABLE_TEXT:
375 case ui::AX_ROLE_TEXT_AREA:
376 case ui::AX_ROLE_TEXT_FIELD:
377 case ui::AX_ROLE_TIME:
378 GetHtmlAttribute("placeholder", &placeholder);
381 int title_elem_id = GetIntAttribute(
382 ui::AX_ATTR_TITLE_UI_ELEMENT);
384 if (!description.empty())
386 else if (title_elem_id && !name().empty())
387 text = base::UTF8ToUTF16(name());
388 else if (!help.empty())
390 else if (!name().empty())
391 text = base::UTF8ToUTF16(name());
392 else if (!placeholder.empty())
394 else if (!value().empty())
395 text = base::UTF8ToUTF16(value());
397 // This is called from PlatformIsLeaf, so don't call PlatformChildCount
400 (HasOnlyStaticTextChildren() ||
401 (IsFocusable() && HasOnlyTextAndImageChildren()))) {
402 for (uint32 i = 0; i < InternalChildCount(); i++) {
403 BrowserAccessibility* child = InternalGetChild(i);
404 text += static_cast<BrowserAccessibilityAndroid*>(child)->GetText();
408 if (text.empty() && (IsLink() || GetRole() == ui::AX_ROLE_IMAGE)) {
409 base::string16 url = GetString16Attribute(ui::AX_ATTR_URL);
410 // Given a url like http://foo.com/bar/baz.png, just return the
411 // base name, e.g., "baz".
412 int trailing_slashes = 0;
413 while (url.size() - trailing_slashes > 0 &&
414 url[url.size() - trailing_slashes - 1] == '/') {
417 if (trailing_slashes)
418 url = url.substr(0, url.size() - trailing_slashes);
419 size_t slash_index = url.rfind('/');
420 if (slash_index != std::string::npos)
421 url = url.substr(slash_index + 1);
422 size_t dot_index = url.rfind('.');
423 if (dot_index != std::string::npos)
424 url = url.substr(0, dot_index);
431 int BrowserAccessibilityAndroid::GetItemIndex() const {
434 case ui::AX_ROLE_LIST_ITEM:
435 case ui::AX_ROLE_LIST_BOX_OPTION:
436 case ui::AX_ROLE_TREE_ITEM:
437 index = GetIndexInParent();
439 case ui::AX_ROLE_SLIDER:
440 case ui::AX_ROLE_PROGRESS_INDICATOR: {
441 // Return a percentage here for live feedback in an AccessibilityEvent.
442 // The exact value is returned in RangeCurrentValue.
443 float min = GetFloatAttribute(ui::AX_ATTR_MIN_VALUE_FOR_RANGE);
444 float max = GetFloatAttribute(ui::AX_ATTR_MAX_VALUE_FOR_RANGE);
445 float value = GetFloatAttribute(ui::AX_ATTR_VALUE_FOR_RANGE);
446 if (max > min && value >= min && value <= max)
447 index = static_cast<int>(((value - min)) * 100 / (max - min));
454 int BrowserAccessibilityAndroid::GetItemCount() const {
457 case ui::AX_ROLE_LIST:
458 case ui::AX_ROLE_LIST_BOX:
459 case ui::AX_ROLE_DESCRIPTION_LIST:
460 count = PlatformChildCount();
462 case ui::AX_ROLE_SLIDER:
463 case ui::AX_ROLE_PROGRESS_INDICATOR:
464 // An AccessibilityEvent can only return integer information about a
465 // seek control, so we return a percentage. The real range is returned
466 // in RangeMin and RangeMax.
473 int BrowserAccessibilityAndroid::GetScrollX() const {
475 GetIntAttribute(ui::AX_ATTR_SCROLL_X, &value);
479 int BrowserAccessibilityAndroid::GetScrollY() const {
481 GetIntAttribute(ui::AX_ATTR_SCROLL_Y, &value);
485 int BrowserAccessibilityAndroid::GetMaxScrollX() const {
487 GetIntAttribute(ui::AX_ATTR_SCROLL_X_MAX, &value);
491 int BrowserAccessibilityAndroid::GetMaxScrollY() const {
493 GetIntAttribute(ui::AX_ATTR_SCROLL_Y_MAX, &value);
497 int BrowserAccessibilityAndroid::GetTextChangeFromIndex() const {
499 while (index < old_value_.length() &&
500 index < new_value_.length() &&
501 old_value_[index] == new_value_[index]) {
507 int BrowserAccessibilityAndroid::GetTextChangeAddedCount() const {
508 size_t old_len = old_value_.length();
509 size_t new_len = new_value_.length();
511 while (left < old_len &&
513 old_value_[left] == new_value_[left]) {
517 while (right < old_len &&
519 old_value_[old_len - right - 1] == new_value_[new_len - right - 1]) {
522 return (new_len - left - right);
525 int BrowserAccessibilityAndroid::GetTextChangeRemovedCount() const {
526 size_t old_len = old_value_.length();
527 size_t new_len = new_value_.length();
529 while (left < old_len &&
531 old_value_[left] == new_value_[left]) {
535 while (right < old_len &&
537 old_value_[old_len - right - 1] == new_value_[new_len - right - 1]) {
540 return (old_len - left - right);
543 base::string16 BrowserAccessibilityAndroid::GetTextChangeBeforeText() const {
547 int BrowserAccessibilityAndroid::GetSelectionStart() const {
549 GetIntAttribute(ui::AX_ATTR_TEXT_SEL_START, &sel_start);
553 int BrowserAccessibilityAndroid::GetSelectionEnd() const {
555 GetIntAttribute(ui::AX_ATTR_TEXT_SEL_END, &sel_end);
559 int BrowserAccessibilityAndroid::GetEditableTextLength() const {
560 return value().length();
563 int BrowserAccessibilityAndroid::AndroidInputType() const {
564 std::string html_tag = GetStringAttribute(
565 ui::AX_ATTR_HTML_TAG);
566 if (html_tag != "input")
567 return ANDROID_TEXT_INPUTTYPE_TYPE_NULL;
570 if (!GetHtmlAttribute("type", &type))
571 return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT;
573 if (type == "" || type == "text" || type == "search")
574 return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT;
575 else if (type == "date")
576 return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_DATE;
577 else if (type == "datetime" || type == "datetime-local")
578 return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME;
579 else if (type == "email")
580 return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_EMAIL;
581 else if (type == "month")
582 return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_DATE;
583 else if (type == "number")
584 return ANDROID_TEXT_INPUTTYPE_TYPE_NUMBER;
585 else if (type == "password")
586 return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_PASSWORD;
587 else if (type == "tel")
588 return ANDROID_TEXT_INPUTTYPE_TYPE_PHONE;
589 else if (type == "time")
590 return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_TIME;
591 else if (type == "url")
592 return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_URI;
593 else if (type == "week")
594 return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME;
596 return ANDROID_TEXT_INPUTTYPE_TYPE_NULL;
599 int BrowserAccessibilityAndroid::AndroidLiveRegionType() const {
600 std::string live = GetStringAttribute(
601 ui::AX_ATTR_LIVE_STATUS);
602 if (live == "polite")
603 return ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_POLITE;
604 else if (live == "assertive")
605 return ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_ASSERTIVE;
606 return ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_NONE;
609 int BrowserAccessibilityAndroid::AndroidRangeType() const {
610 return ANDROID_VIEW_ACCESSIBILITY_RANGE_TYPE_FLOAT;
613 int BrowserAccessibilityAndroid::RowCount() const {
614 if (GetRole() == ui::AX_ROLE_GRID ||
615 GetRole() == ui::AX_ROLE_TABLE) {
616 return CountChildrenWithRole(ui::AX_ROLE_ROW);
619 if (GetRole() == ui::AX_ROLE_LIST ||
620 GetRole() == ui::AX_ROLE_LIST_BOX ||
621 GetRole() == ui::AX_ROLE_DESCRIPTION_LIST ||
622 GetRole() == ui::AX_ROLE_TREE) {
623 return PlatformChildCount();
629 int BrowserAccessibilityAndroid::ColumnCount() const {
630 if (GetRole() == ui::AX_ROLE_GRID ||
631 GetRole() == ui::AX_ROLE_TABLE) {
632 return CountChildrenWithRole(ui::AX_ROLE_COLUMN);
637 int BrowserAccessibilityAndroid::RowIndex() const {
638 if (GetRole() == ui::AX_ROLE_LIST_ITEM ||
639 GetRole() == ui::AX_ROLE_LIST_BOX_OPTION ||
640 GetRole() == ui::AX_ROLE_TREE_ITEM) {
641 return GetIndexInParent();
644 return GetIntAttribute(ui::AX_ATTR_TABLE_CELL_ROW_INDEX);
647 int BrowserAccessibilityAndroid::RowSpan() const {
648 return GetIntAttribute(ui::AX_ATTR_TABLE_CELL_ROW_SPAN);
651 int BrowserAccessibilityAndroid::ColumnIndex() const {
652 return GetIntAttribute(ui::AX_ATTR_TABLE_CELL_COLUMN_INDEX);
655 int BrowserAccessibilityAndroid::ColumnSpan() const {
656 return GetIntAttribute(ui::AX_ATTR_TABLE_CELL_COLUMN_SPAN);
659 float BrowserAccessibilityAndroid::RangeMin() const {
660 return GetFloatAttribute(ui::AX_ATTR_MIN_VALUE_FOR_RANGE);
663 float BrowserAccessibilityAndroid::RangeMax() const {
664 return GetFloatAttribute(ui::AX_ATTR_MAX_VALUE_FOR_RANGE);
667 float BrowserAccessibilityAndroid::RangeCurrentValue() const {
668 return GetFloatAttribute(ui::AX_ATTR_VALUE_FOR_RANGE);
671 void BrowserAccessibilityAndroid::GetGranularityBoundaries(
673 std::vector<int32>* starts,
674 std::vector<int32>* ends,
676 switch (granularity) {
677 case ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_LINE:
678 GetLineBoundaries(starts, ends, offset);
680 case ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_WORD:
681 GetWordBoundaries(starts, ends, offset);
688 void BrowserAccessibilityAndroid::GetLineBoundaries(
689 std::vector<int32>* line_starts,
690 std::vector<int32>* line_ends,
692 // If this node has no children, treat it as all one line.
693 if (GetText().size() > 0 && !InternalChildCount()) {
694 line_starts->push_back(offset);
695 line_ends->push_back(offset + GetText().size());
698 // If this is a static text node, get the line boundaries from the
699 // inline text boxes if possible.
700 if (GetRole() == ui::AX_ROLE_STATIC_TEXT) {
702 for (uint32 i = 0; i < InternalChildCount(); i++) {
703 BrowserAccessibilityAndroid* child =
704 static_cast<BrowserAccessibilityAndroid*>(InternalGetChild(i));
705 CHECK_EQ(ui::AX_ROLE_INLINE_TEXT_BOX, child->GetRole());
706 // TODO(dmazzoni): replace this with a proper API to determine
707 // if two inline text boxes are on the same line. http://crbug.com/421771
708 int y = child->GetLocation().y();
710 line_starts->push_back(offset);
711 } else if (y != last_y) {
712 line_ends->push_back(offset);
713 line_starts->push_back(offset);
715 offset += child->GetText().size();
718 line_ends->push_back(offset);
722 // Otherwise, call GetLineBoundaries recursively on the children.
723 for (uint32 i = 0; i < InternalChildCount(); i++) {
724 BrowserAccessibilityAndroid* child =
725 static_cast<BrowserAccessibilityAndroid*>(InternalGetChild(i));
726 child->GetLineBoundaries(line_starts, line_ends, offset);
727 offset += child->GetText().size();
731 void BrowserAccessibilityAndroid::GetWordBoundaries(
732 std::vector<int32>* word_starts,
733 std::vector<int32>* word_ends,
735 if (GetRole() == ui::AX_ROLE_INLINE_TEXT_BOX) {
736 const std::vector<int32>& starts = GetIntListAttribute(
737 ui::AX_ATTR_WORD_STARTS);
738 const std::vector<int32>& ends = GetIntListAttribute(
739 ui::AX_ATTR_WORD_ENDS);
740 for (size_t i = 0; i < starts.size(); ++i) {
741 word_starts->push_back(offset + starts[i]);
742 word_ends->push_back(offset + ends[i]);
747 base::string16 concatenated_text;
748 for (uint32 i = 0; i < InternalChildCount(); i++) {
749 BrowserAccessibilityAndroid* child =
750 static_cast<BrowserAccessibilityAndroid*>(InternalGetChild(i));
751 base::string16 child_text = child->GetText();
752 concatenated_text += child->GetText();
755 base::string16 text = GetText();
756 if (text.empty() || concatenated_text == text) {
757 // Great - this node is just the concatenation of its children, so
758 // we can get the word boundaries recursively.
759 for (uint32 i = 0; i < InternalChildCount(); i++) {
760 BrowserAccessibilityAndroid* child =
761 static_cast<BrowserAccessibilityAndroid*>(InternalGetChild(i));
762 child->GetWordBoundaries(word_starts, word_ends, offset);
763 offset += child->GetText().size();
766 // This node has its own accessible text that doesn't match its
767 // visible text - like alt text for an image or something with an
768 // aria-label, so split the text into words locally.
769 base::i18n::BreakIterator iter(text, base::i18n::BreakIterator::BREAK_WORD);
772 while (iter.Advance()) {
774 word_starts->push_back(iter.prev());
775 word_ends->push_back(iter.pos());
781 bool BrowserAccessibilityAndroid::HasFocusableChild() const {
782 // This is called from PlatformIsLeaf, so don't call PlatformChildCount
784 for (uint32 i = 0; i < InternalChildCount(); i++) {
785 BrowserAccessibility* child = InternalGetChild(i);
786 if (child->HasState(ui::AX_STATE_FOCUSABLE))
788 if (static_cast<BrowserAccessibilityAndroid*>(child)->HasFocusableChild())
794 bool BrowserAccessibilityAndroid::HasOnlyStaticTextChildren() const {
795 // This is called from PlatformIsLeaf, so don't call PlatformChildCount
797 for (uint32 i = 0; i < InternalChildCount(); i++) {
798 BrowserAccessibility* child = InternalGetChild(i);
799 if (child->GetRole() != ui::AX_ROLE_STATIC_TEXT)
805 bool BrowserAccessibilityAndroid::HasOnlyTextAndImageChildren() const {
806 // This is called from PlatformIsLeaf, so don't call PlatformChildCount
808 for (uint32 i = 0; i < InternalChildCount(); i++) {
809 BrowserAccessibility* child = InternalGetChild(i);
810 if (child->GetRole() != ui::AX_ROLE_STATIC_TEXT &&
811 child->GetRole() != ui::AX_ROLE_IMAGE) {
818 bool BrowserAccessibilityAndroid::IsIframe() const {
819 base::string16 html_tag = GetString16Attribute(
820 ui::AX_ATTR_HTML_TAG);
821 return html_tag == base::ASCIIToUTF16("iframe");
824 void BrowserAccessibilityAndroid::OnDataChanged() {
825 BrowserAccessibility::OnDataChanged();
827 if (IsEditableText()) {
828 if (base::UTF8ToUTF16(value()) != new_value_) {
829 old_value_ = new_value_;
830 new_value_ = base::UTF8ToUTF16(value());
834 if (GetRole() == ui::AX_ROLE_ALERT && first_time_)
835 manager()->NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, this);
838 if (GetString16Attribute(
839 ui::AX_ATTR_CONTAINER_LIVE_STATUS, &live)) {
840 NotifyLiveRegionUpdate(live);
846 void BrowserAccessibilityAndroid::NotifyLiveRegionUpdate(
847 base::string16& aria_live) {
848 if (!EqualsASCII(aria_live, aria_strings::kAriaLivePolite) &&
849 !EqualsASCII(aria_live, aria_strings::kAriaLiveAssertive))
852 base::string16 text = GetText();
853 if (cached_text_ != text) {
855 manager()->NotifyAccessibilityEvent(ui::AX_EVENT_SHOW,
862 int BrowserAccessibilityAndroid::CountChildrenWithRole(ui::AXRole role) const {
864 for (uint32 i = 0; i < PlatformChildCount(); i++) {
865 if (PlatformGetChild(i)->GetRole() == role)
871 } // namespace content