| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "content/browser/accessibility/browser_accessibility_android.h" |
| |
| #include "base/strings/utf_string_conversions.h" |
| #include "content/browser/accessibility/browser_accessibility_manager_android.h" |
| #include "content/common/accessibility_messages.h" |
| #include "content/common/accessibility_node_data.h" |
| |
| namespace { |
| |
| // These are enums from android.text.InputType in Java: |
| enum { |
| ANDROID_TEXT_INPUTTYPE_TYPE_NULL = 0, |
| ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME = 0x4, |
| ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_DATE = 0x14, |
| ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_TIME = 0x24, |
| ANDROID_TEXT_INPUTTYPE_TYPE_NUMBER = 0x2, |
| ANDROID_TEXT_INPUTTYPE_TYPE_PHONE = 0x3, |
| ANDROID_TEXT_INPUTTYPE_TYPE_TEXT = 0x1, |
| ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_URI = 0x11, |
| ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_EDIT_TEXT = 0xa1, |
| ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_EMAIL = 0xd1, |
| ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_PASSWORD = 0xe1 |
| }; |
| |
| // These are enums from android.view.View in Java: |
| enum { |
| ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_NONE = 0, |
| ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_POLITE = 1, |
| ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_ASSERTIVE = 2 |
| }; |
| |
| // These are enums from |
| // android.view.accessibility.AccessibilityNodeInfo.RangeInfo in Java: |
| enum { |
| ANDROID_VIEW_ACCESSIBILITY_RANGE_TYPE_FLOAT = 1 |
| }; |
| |
| } // namespace |
| |
| namespace content { |
| |
| // static |
| BrowserAccessibility* BrowserAccessibility::Create() { |
| return new BrowserAccessibilityAndroid(); |
| } |
| |
| BrowserAccessibilityAndroid::BrowserAccessibilityAndroid() { |
| first_time_ = true; |
| } |
| |
| bool BrowserAccessibilityAndroid::IsNative() const { |
| return true; |
| } |
| |
| bool BrowserAccessibilityAndroid::PlatformIsLeaf() const { |
| if (child_count() == 0) |
| return true; |
| |
| // Iframes are always allowed to contain children. |
| if (IsIframe() || |
| role() == blink::WebAXRoleRootWebArea || |
| role() == blink::WebAXRoleWebArea) { |
| return false; |
| } |
| |
| // If it has a focusable child, we definitely can't leave out children. |
| if (HasFocusableChild()) |
| return false; |
| |
| // Headings with text can drop their children. |
| base::string16 name = GetText(); |
| if (role() == blink::WebAXRoleHeading && !name.empty()) |
| return true; |
| |
| // Focusable nodes with text can drop their children. |
| if (HasState(blink::WebAXStateFocusable) && !name.empty()) |
| return true; |
| |
| // Nodes with only static text as children can drop their children. |
| if (HasOnlyStaticTextChildren()) |
| return true; |
| |
| return BrowserAccessibility::PlatformIsLeaf(); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsCheckable() const { |
| bool checkable = false; |
| bool is_aria_pressed_defined; |
| bool is_mixed; |
| GetAriaTristate("aria-pressed", &is_aria_pressed_defined, &is_mixed); |
| if (role() == blink::WebAXRoleCheckBox || |
| role() == blink::WebAXRoleRadioButton || |
| is_aria_pressed_defined) { |
| checkable = true; |
| } |
| if (HasState(blink::WebAXStateChecked)) |
| checkable = true; |
| return checkable; |
| } |
| |
| bool BrowserAccessibilityAndroid::IsChecked() const { |
| return HasState(blink::WebAXStateChecked); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsClickable() const { |
| return (PlatformIsLeaf() && !GetText().empty()); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsCollection() const { |
| return (role() == blink::WebAXRoleGrid || |
| role() == blink::WebAXRoleList || |
| role() == blink::WebAXRoleListBox || |
| role() == blink::WebAXRoleTable || |
| role() == blink::WebAXRoleTree); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsCollectionItem() const { |
| return (role() == blink::WebAXRoleCell || |
| role() == blink::WebAXRoleColumnHeader || |
| role() == blink::WebAXRoleDescriptionListTerm || |
| role() == blink::WebAXRoleListBoxOption || |
| role() == blink::WebAXRoleListItem || |
| role() == blink::WebAXRoleRowHeader || |
| role() == blink::WebAXRoleTreeItem); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsContentInvalid() const { |
| std::string invalid; |
| return GetHtmlAttribute("aria-invalid", &invalid); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsDismissable() const { |
| return false; // No concept of "dismissable" on the web currently. |
| } |
| |
| bool BrowserAccessibilityAndroid::IsEnabled() const { |
| return HasState(blink::WebAXStateEnabled); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsFocusable() const { |
| bool focusable = HasState(blink::WebAXStateFocusable); |
| if (IsIframe() || |
| role() == blink::WebAXRoleWebArea) { |
| focusable = false; |
| } |
| return focusable; |
| } |
| |
| bool BrowserAccessibilityAndroid::IsFocused() const { |
| return manager()->GetFocus(manager()->GetRoot()) == this; |
| } |
| |
| bool BrowserAccessibilityAndroid::IsHeading() const { |
| return (role() == blink::WebAXRoleColumnHeader || |
| role() == blink::WebAXRoleHeading || |
| role() == blink::WebAXRoleRowHeader); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsHierarchical() const { |
| return (role() == blink::WebAXRoleList || |
| role() == blink::WebAXRoleTree); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsMultiLine() const { |
| return role() == blink::WebAXRoleTextArea; |
| } |
| |
| bool BrowserAccessibilityAndroid::IsPassword() const { |
| return HasState(blink::WebAXStateProtected); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsRangeType() const { |
| return (role() == blink::WebAXRoleProgressIndicator || |
| role() == blink::WebAXRoleScrollBar || |
| role() == blink::WebAXRoleSlider); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsScrollable() const { |
| int dummy; |
| return GetIntAttribute(AccessibilityNodeData::ATTR_SCROLL_X_MAX, &dummy); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsSelected() const { |
| return HasState(blink::WebAXStateSelected); |
| } |
| |
| bool BrowserAccessibilityAndroid::IsVisibleToUser() const { |
| return !HasState(blink::WebAXStateInvisible); |
| } |
| |
| bool BrowserAccessibilityAndroid::CanOpenPopup() const { |
| return HasState(blink::WebAXStateHaspopup); |
| } |
| |
| const char* BrowserAccessibilityAndroid::GetClassName() const { |
| const char* class_name = NULL; |
| |
| switch(role()) { |
| case blink::WebAXRoleEditableText: |
| case blink::WebAXRoleSpinButton: |
| case blink::WebAXRoleTextArea: |
| case blink::WebAXRoleTextField: |
| class_name = "android.widget.EditText"; |
| break; |
| case blink::WebAXRoleSlider: |
| class_name = "android.widget.SeekBar"; |
| break; |
| case blink::WebAXRoleComboBox: |
| class_name = "android.widget.Spinner"; |
| break; |
| case blink::WebAXRoleButton: |
| case blink::WebAXRoleMenuButton: |
| case blink::WebAXRolePopUpButton: |
| class_name = "android.widget.Button"; |
| break; |
| case blink::WebAXRoleCheckBox: |
| class_name = "android.widget.CheckBox"; |
| break; |
| case blink::WebAXRoleRadioButton: |
| class_name = "android.widget.RadioButton"; |
| break; |
| case blink::WebAXRoleToggleButton: |
| class_name = "android.widget.ToggleButton"; |
| break; |
| case blink::WebAXRoleCanvas: |
| case blink::WebAXRoleImage: |
| class_name = "android.widget.Image"; |
| break; |
| case blink::WebAXRoleProgressIndicator: |
| class_name = "android.widget.ProgressBar"; |
| break; |
| case blink::WebAXRoleTabList: |
| class_name = "android.widget.TabWidget"; |
| break; |
| case blink::WebAXRoleGrid: |
| case blink::WebAXRoleTable: |
| class_name = "android.widget.GridView"; |
| break; |
| case blink::WebAXRoleList: |
| case blink::WebAXRoleListBox: |
| class_name = "android.widget.ListView"; |
| break; |
| case blink::WebAXRoleDialog: |
| class_name = "android.app.Dialog"; |
| break; |
| default: |
| class_name = "android.view.View"; |
| break; |
| } |
| |
| return class_name; |
| } |
| |
| base::string16 BrowserAccessibilityAndroid::GetText() const { |
| if (IsIframe() || |
| role() == blink::WebAXRoleWebArea) { |
| return base::string16(); |
| } |
| |
| base::string16 description = GetString16Attribute( |
| AccessibilityNodeData::ATTR_DESCRIPTION); |
| base::string16 text; |
| if (!name().empty()) |
| text = base::UTF8ToUTF16(name()); |
| else if (!description.empty()) |
| text = description; |
| else if (!value().empty()) |
| text = base::UTF8ToUTF16(value()); |
| |
| // This is called from PlatformIsLeaf, so don't call PlatformChildCount |
| // from within this! |
| if (text.empty() && HasOnlyStaticTextChildren()) { |
| for (uint32 i = 0; i < child_count(); i++) { |
| BrowserAccessibility* child = children()[i]; |
| text += static_cast<BrowserAccessibilityAndroid*>(child)->GetText(); |
| } |
| } |
| |
| switch(role()) { |
| case blink::WebAXRoleImageMapLink: |
| case blink::WebAXRoleLink: |
| if (!text.empty()) |
| text += ASCIIToUTF16(" "); |
| text += ASCIIToUTF16("Link"); |
| break; |
| case blink::WebAXRoleHeading: |
| // Only append "heading" if this node already has text. |
| if (!text.empty()) |
| text += ASCIIToUTF16(" Heading"); |
| break; |
| } |
| |
| return text; |
| } |
| |
| int BrowserAccessibilityAndroid::GetItemIndex() const { |
| int index = 0; |
| switch(role()) { |
| case blink::WebAXRoleListItem: |
| case blink::WebAXRoleListBoxOption: |
| case blink::WebAXRoleTreeItem: |
| index = index_in_parent(); |
| break; |
| case blink::WebAXRoleSlider: |
| case blink::WebAXRoleProgressIndicator: { |
| float value_for_range; |
| if (GetFloatAttribute( |
| AccessibilityNodeData::ATTR_VALUE_FOR_RANGE, &value_for_range)) { |
| index = static_cast<int>(value_for_range); |
| } |
| break; |
| } |
| } |
| return index; |
| } |
| |
| int BrowserAccessibilityAndroid::GetItemCount() const { |
| int count = 0; |
| switch(role()) { |
| case blink::WebAXRoleList: |
| case blink::WebAXRoleListBox: |
| count = PlatformChildCount(); |
| break; |
| case blink::WebAXRoleSlider: |
| case blink::WebAXRoleProgressIndicator: { |
| float max_value_for_range; |
| if (GetFloatAttribute(AccessibilityNodeData::ATTR_MAX_VALUE_FOR_RANGE, |
| &max_value_for_range)) { |
| count = static_cast<int>(max_value_for_range); |
| } |
| break; |
| } |
| } |
| return count; |
| } |
| |
| int BrowserAccessibilityAndroid::GetScrollX() const { |
| int value = 0; |
| GetIntAttribute(AccessibilityNodeData::ATTR_SCROLL_X, &value); |
| return value; |
| } |
| |
| int BrowserAccessibilityAndroid::GetScrollY() const { |
| int value = 0; |
| GetIntAttribute(AccessibilityNodeData::ATTR_SCROLL_Y, &value); |
| return value; |
| } |
| |
| int BrowserAccessibilityAndroid::GetMaxScrollX() const { |
| int value = 0; |
| GetIntAttribute(AccessibilityNodeData::ATTR_SCROLL_X_MAX, &value); |
| return value; |
| } |
| |
| int BrowserAccessibilityAndroid::GetMaxScrollY() const { |
| int value = 0; |
| GetIntAttribute(AccessibilityNodeData::ATTR_SCROLL_Y_MAX, &value); |
| return value; |
| } |
| |
| int BrowserAccessibilityAndroid::GetTextChangeFromIndex() const { |
| size_t index = 0; |
| while (index < old_value_.length() && |
| index < new_value_.length() && |
| old_value_[index] == new_value_[index]) { |
| index++; |
| } |
| return index; |
| } |
| |
| int BrowserAccessibilityAndroid::GetTextChangeAddedCount() const { |
| size_t old_len = old_value_.length(); |
| size_t new_len = new_value_.length(); |
| size_t left = 0; |
| while (left < old_len && |
| left < new_len && |
| old_value_[left] == new_value_[left]) { |
| left++; |
| } |
| size_t right = 0; |
| while (right < old_len && |
| right < new_len && |
| old_value_[old_len - right - 1] == new_value_[new_len - right - 1]) { |
| right++; |
| } |
| return (new_len - left - right); |
| } |
| |
| int BrowserAccessibilityAndroid::GetTextChangeRemovedCount() const { |
| size_t old_len = old_value_.length(); |
| size_t new_len = new_value_.length(); |
| size_t left = 0; |
| while (left < old_len && |
| left < new_len && |
| old_value_[left] == new_value_[left]) { |
| left++; |
| } |
| size_t right = 0; |
| while (right < old_len && |
| right < new_len && |
| old_value_[old_len - right - 1] == new_value_[new_len - right - 1]) { |
| right++; |
| } |
| return (old_len - left - right); |
| } |
| |
| base::string16 BrowserAccessibilityAndroid::GetTextChangeBeforeText() const { |
| return old_value_; |
| } |
| |
| int BrowserAccessibilityAndroid::GetSelectionStart() const { |
| int sel_start = 0; |
| GetIntAttribute(AccessibilityNodeData::ATTR_TEXT_SEL_START, &sel_start); |
| return sel_start; |
| } |
| |
| int BrowserAccessibilityAndroid::GetSelectionEnd() const { |
| int sel_end = 0; |
| GetIntAttribute(AccessibilityNodeData::ATTR_TEXT_SEL_END, &sel_end); |
| return sel_end; |
| } |
| |
| int BrowserAccessibilityAndroid::GetEditableTextLength() const { |
| return value().length(); |
| } |
| |
| int BrowserAccessibilityAndroid::AndroidInputType() const { |
| std::string html_tag = GetStringAttribute( |
| AccessibilityNodeData::ATTR_HTML_TAG); |
| if (html_tag != "input") |
| return ANDROID_TEXT_INPUTTYPE_TYPE_NULL; |
| |
| std::string type; |
| if (!GetHtmlAttribute("type", &type)) |
| return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT; |
| |
| if (type == "" || type == "text" || type == "search") |
| return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT; |
| else if (type == "date") |
| return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_DATE; |
| else if (type == "datetime" || type == "datetime-local") |
| return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME; |
| else if (type == "email") |
| return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_EMAIL; |
| else if (type == "month") |
| return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_DATE; |
| else if (type == "number") |
| return ANDROID_TEXT_INPUTTYPE_TYPE_NUMBER; |
| else if (type == "password") |
| return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_WEB_PASSWORD; |
| else if (type == "tel") |
| return ANDROID_TEXT_INPUTTYPE_TYPE_PHONE; |
| else if (type == "time") |
| return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME_TIME; |
| else if (type == "url") |
| return ANDROID_TEXT_INPUTTYPE_TYPE_TEXT_URI; |
| else if (type == "week") |
| return ANDROID_TEXT_INPUTTYPE_TYPE_DATETIME; |
| |
| return ANDROID_TEXT_INPUTTYPE_TYPE_NULL; |
| } |
| |
| int BrowserAccessibilityAndroid::AndroidLiveRegionType() const { |
| std::string live = GetStringAttribute( |
| AccessibilityNodeData::ATTR_LIVE_STATUS); |
| if (live == "polite") |
| return ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_POLITE; |
| else if (live == "assertive") |
| return ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_ASSERTIVE; |
| return ANDROID_VIEW_VIEW_ACCESSIBILITY_LIVE_REGION_NONE; |
| } |
| |
| int BrowserAccessibilityAndroid::AndroidRangeType() const { |
| return ANDROID_VIEW_ACCESSIBILITY_RANGE_TYPE_FLOAT; |
| } |
| |
| int BrowserAccessibilityAndroid::RowCount() const { |
| if (role() == blink::WebAXRoleGrid || |
| role() == blink::WebAXRoleTable) { |
| return CountChildrenWithRole(blink::WebAXRoleRow); |
| } |
| |
| if (role() == blink::WebAXRoleList || |
| role() == blink::WebAXRoleListBox || |
| role() == blink::WebAXRoleTree) { |
| return PlatformChildCount(); |
| } |
| |
| return 0; |
| } |
| |
| int BrowserAccessibilityAndroid::ColumnCount() const { |
| if (role() == blink::WebAXRoleGrid || |
| role() == blink::WebAXRoleTable) { |
| return CountChildrenWithRole(blink::WebAXRoleColumn); |
| } |
| return 0; |
| } |
| |
| int BrowserAccessibilityAndroid::RowIndex() const { |
| if (role() == blink::WebAXRoleListItem || |
| role() == blink::WebAXRoleListBoxOption || |
| role() == blink::WebAXRoleTreeItem) { |
| return index_in_parent(); |
| } |
| |
| return GetIntAttribute(AccessibilityNodeData::ATTR_TABLE_CELL_ROW_INDEX); |
| } |
| |
| int BrowserAccessibilityAndroid::RowSpan() const { |
| return GetIntAttribute(AccessibilityNodeData::ATTR_TABLE_CELL_ROW_SPAN); |
| } |
| |
| int BrowserAccessibilityAndroid::ColumnIndex() const { |
| return GetIntAttribute(AccessibilityNodeData::ATTR_TABLE_CELL_COLUMN_INDEX); |
| } |
| |
| int BrowserAccessibilityAndroid::ColumnSpan() const { |
| return GetIntAttribute(AccessibilityNodeData::ATTR_TABLE_CELL_COLUMN_SPAN); |
| } |
| |
| float BrowserAccessibilityAndroid::RangeMin() const { |
| return GetFloatAttribute(AccessibilityNodeData::ATTR_MIN_VALUE_FOR_RANGE); |
| } |
| |
| float BrowserAccessibilityAndroid::RangeMax() const { |
| return GetFloatAttribute(AccessibilityNodeData::ATTR_MAX_VALUE_FOR_RANGE); |
| } |
| |
| float BrowserAccessibilityAndroid::RangeCurrentValue() const { |
| return GetFloatAttribute(AccessibilityNodeData::ATTR_VALUE_FOR_RANGE); |
| } |
| |
| bool BrowserAccessibilityAndroid::HasFocusableChild() const { |
| // This is called from PlatformIsLeaf, so don't call PlatformChildCount |
| // from within this! |
| for (uint32 i = 0; i < child_count(); i++) { |
| BrowserAccessibility* child = children()[i]; |
| if (child->HasState(blink::WebAXStateFocusable)) |
| return true; |
| if (static_cast<BrowserAccessibilityAndroid*>(child)->HasFocusableChild()) |
| return true; |
| } |
| return false; |
| } |
| |
| bool BrowserAccessibilityAndroid::HasOnlyStaticTextChildren() const { |
| // This is called from PlatformIsLeaf, so don't call PlatformChildCount |
| // from within this! |
| for (uint32 i = 0; i < child_count(); i++) { |
| BrowserAccessibility* child = children()[i]; |
| if (child->role() != blink::WebAXRoleStaticText) |
| return false; |
| } |
| return true; |
| } |
| |
| bool BrowserAccessibilityAndroid::IsIframe() const { |
| base::string16 html_tag = GetString16Attribute( |
| AccessibilityNodeData::ATTR_HTML_TAG); |
| return html_tag == ASCIIToUTF16("iframe"); |
| } |
| |
| void BrowserAccessibilityAndroid::PostInitialize() { |
| BrowserAccessibility::PostInitialize(); |
| |
| if (IsEditableText()) { |
| if (base::UTF8ToUTF16(value()) != new_value_) { |
| old_value_ = new_value_; |
| new_value_ = base::UTF8ToUTF16(value()); |
| } |
| } |
| |
| if (role() == blink::WebAXRoleAlert && first_time_) |
| manager()->NotifyAccessibilityEvent(blink::WebAXEventAlert, this); |
| |
| base::string16 live; |
| if (GetString16Attribute( |
| AccessibilityNodeData::ATTR_CONTAINER_LIVE_STATUS, &live)) { |
| NotifyLiveRegionUpdate(live); |
| } |
| |
| first_time_ = false; |
| } |
| |
| void BrowserAccessibilityAndroid::NotifyLiveRegionUpdate( |
| base::string16& aria_live) { |
| if (!EqualsASCII(aria_live, aria_strings::kAriaLivePolite) && |
| !EqualsASCII(aria_live, aria_strings::kAriaLiveAssertive)) |
| return; |
| |
| base::string16 text = GetText(); |
| if (cached_text_ != text) { |
| if (!text.empty()) { |
| manager()->NotifyAccessibilityEvent(blink::WebAXEventShow, |
| this); |
| } |
| cached_text_ = text; |
| } |
| } |
| |
| int BrowserAccessibilityAndroid::CountChildrenWithRole( |
| blink::WebAXRole role) const { |
| int count = 0; |
| for (uint32 i = 0; i < PlatformChildCount(); i++) { |
| if (PlatformGetChild(i)->role() == role) |
| count++; |
| } |
| return count; |
| } |
| |
| } // namespace content |