| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #import "content/browser/accessibility/browser_accessibility_cocoa.h" |
| |
| #include <execinfo.h> |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <string.h> |
| |
| #include <algorithm> |
| #include <iterator> |
| #include <map> |
| #include <memory> |
| #include <optional> |
| #include <utility> |
| |
| #include "base/apple/foundation_util.h" |
| #include "base/apple/scoped_cftyperef.h" |
| #include "base/memory/raw_ptr.h" |
| #include "base/strings/string_split.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/sys_string_conversions.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/trace_event/trace_event.h" |
| #include "content/browser/accessibility/browser_accessibility_mac.h" |
| #include "content/browser/accessibility/browser_accessibility_manager.h" |
| #include "content/browser/accessibility/browser_accessibility_manager_mac.h" |
| #include "content/browser/accessibility/browser_accessibility_state_impl.h" |
| #include "content/browser/accessibility/one_shot_accessibility_tree_search.h" |
| #include "content/public/common/content_client.h" |
| #include "third_party/blink/public/strings/grit/blink_strings.h" |
| #include "third_party/skia/include/core/SkColor.h" |
| #include "ui/accessibility/ax_common.h" |
| #include "ui/accessibility/ax_enum_util.h" |
| #include "ui/accessibility/ax_range.h" |
| #include "ui/accessibility/ax_role_properties.h" |
| #include "ui/accessibility/ax_selection.h" |
| #include "ui/accessibility/platform/ax_platform_node.h" |
| #import "ui/accessibility/platform/ax_platform_node_mac.h" |
| #include "ui/accessibility/platform/ax_platform_tree_manager_delegate.h" |
| #include "ui/accessibility/platform/ax_utils_mac.h" |
| #include "ui/gfx/mac/coordinate_conversion.h" |
| #include "ui/strings/grit/ax_strings.h" |
| |
| using AXPosition = ui::AXPlatformNodeDelegate::AXPosition; |
| using AXRange = ui::AXPlatformNodeDelegate::AXRange; |
| using StringAttribute = ax::mojom::StringAttribute; |
| using content::AccessibilityMatchPredicate; |
| using content::BrowserAccessibility; |
| using content::BrowserAccessibilityManager; |
| using content::BrowserAccessibilityManagerMac; |
| using content::ContentClient; |
| using content::OneShotAccessibilityTreeSearch; |
| using ui::AXActionHandlerRegistry; |
| using ui::AXNodeData; |
| using ui::AXPlatformTreeManagerDelegate; |
| using ui::AXPositionToAXTextMarker; |
| using ui::AXRangeToAXTextMarkerRange; |
| using ui::AXTextMarkerRangeToAXRange; |
| using ui::AXTextMarkerToAXPosition; |
| |
| static_assert( |
| std::is_trivially_copyable<BrowserAccessibility::SerializedPosition>::value, |
| "BrowserAccessibility::SerializedPosition must be POD because it's used to " |
| "back an AXTextMarker"); |
| |
| namespace { |
| |
| // Private WebKit accessibility attributes. |
| NSString* const |
| NSAccessibilityUIElementCountForSearchPredicateParameterizedAttribute = |
| @"AXUIElementCountForSearchPredicate"; |
| NSString* const |
| NSAccessibilityUIElementsForSearchPredicateParameterizedAttribute = |
| @"AXUIElementsForSearchPredicate"; |
| |
| // Private attributes for text markers. |
| NSString* const NSAccessibilityStartTextMarkerAttribute = @"AXStartTextMarker"; |
| NSString* const NSAccessibilityEndTextMarkerAttribute = @"AXEndTextMarker"; |
| NSString* const NSAccessibilitySelectedTextMarkerRangeAttribute = |
| @"AXSelectedTextMarkerRange"; |
| NSString* const NSAccessibilityTextMarkerIsValidParameterizedAttribute = |
| @"AXTextMarkerIsValid"; |
| NSString* const NSAccessibilityIndexForTextMarkerParameterizedAttribute = |
| @"AXIndexForTextMarker"; |
| NSString* const NSAccessibilityTextMarkerForIndexParameterizedAttribute = |
| @"AXTextMarkerForIndex"; |
| NSString* const NSAccessibilityEndTextMarkerForBoundsParameterizedAttribute = |
| @"AXEndTextMarkerForBounds"; |
| NSString* const NSAccessibilityStartTextMarkerForBoundsParameterizedAttribute = |
| @"AXStartTextMarkerForBounds"; |
| NSString* const |
| NSAccessibilityLineTextMarkerRangeForTextMarkerParameterizedAttribute = |
| @"AXLineTextMarkerRangeForTextMarker"; |
| // TODO(nektar): Implement programmatic text operations. |
| // |
| // NSString* const NSAccessibilityTextOperationMarkerRanges = |
| // @"AXTextOperationMarkerRanges"; |
| NSString* const NSAccessibilityUIElementForTextMarkerParameterizedAttribute = |
| @"AXUIElementForTextMarker"; |
| NSString* const |
| NSAccessibilityTextMarkerRangeForUIElementParameterizedAttribute = |
| @"AXTextMarkerRangeForUIElement"; |
| NSString* const NSAccessibilityLineForTextMarkerParameterizedAttribute = |
| @"AXLineForTextMarker"; |
| NSString* const NSAccessibilityTextMarkerRangeForLineParameterizedAttribute = |
| @"AXTextMarkerRangeForLine"; |
| NSString* const NSAccessibilityStringForTextMarkerRangeParameterizedAttribute = |
| @"AXStringForTextMarkerRange"; |
| NSString* const NSAccessibilityTextMarkerForPositionParameterizedAttribute = |
| @"AXTextMarkerForPosition"; |
| NSString* const NSAccessibilityBoundsForTextMarkerRangeParameterizedAttribute = |
| @"AXBoundsForTextMarkerRange"; |
| NSString* const |
| NSAccessibilityAttributedStringForTextMarkerRangeWithOptionsParameterizedAttribute = |
| @"AXAttributedStringForTextMarkerRangeWithOptions"; |
| NSString* const |
| NSAccessibilityTextMarkerRangeForUnorderedTextMarkersParameterizedAttribute = |
| @"AXTextMarkerRangeForUnorderedTextMarkers"; |
| NSString* const |
| NSAccessibilityNextTextMarkerForTextMarkerParameterizedAttribute = |
| @"AXNextTextMarkerForTextMarker"; |
| NSString* const |
| NSAccessibilityPreviousTextMarkerForTextMarkerParameterizedAttribute = |
| @"AXPreviousTextMarkerForTextMarker"; |
| NSString* const |
| NSAccessibilityLeftWordTextMarkerRangeForTextMarkerParameterizedAttribute = |
| @"AXLeftWordTextMarkerRangeForTextMarker"; |
| NSString* const |
| NSAccessibilityRightWordTextMarkerRangeForTextMarkerParameterizedAttribute = |
| @"AXRightWordTextMarkerRangeForTextMarker"; |
| NSString* const |
| NSAccessibilityLeftLineTextMarkerRangeForTextMarkerParameterizedAttribute = |
| @"AXLeftLineTextMarkerRangeForTextMarker"; |
| NSString* const |
| NSAccessibilityRightLineTextMarkerRangeForTextMarkerParameterizedAttribute = |
| @"AXRightLineTextMarkerRangeForTextMarker"; |
| NSString* const |
| NSAccessibilitySentenceTextMarkerRangeForTextMarkerParameterizedAttribute = |
| @"AXSentenceTextMarkerRangeForTextMarker"; |
| NSString* const |
| NSAccessibilityParagraphTextMarkerRangeForTextMarkerParameterizedAttribute = |
| @"AXParagraphTextMarkerRangeForTextMarker"; |
| NSString* const |
| NSAccessibilityNextWordEndTextMarkerForTextMarkerParameterizedAttribute = |
| @"AXNextWordEndTextMarkerForTextMarker"; |
| NSString* const |
| NSAccessibilityPreviousWordStartTextMarkerForTextMarkerParameterizedAttribute = |
| @"AXPreviousWordStartTextMarkerForTextMarker"; |
| NSString* const |
| NSAccessibilityNextLineEndTextMarkerForTextMarkerParameterizedAttribute = |
| @"AXNextLineEndTextMarkerForTextMarker"; |
| NSString* const |
| NSAccessibilityPreviousLineStartTextMarkerForTextMarkerParameterizedAttribute = |
| @"AXPreviousLineStartTextMarkerForTextMarker"; |
| NSString* const |
| NSAccessibilityNextSentenceEndTextMarkerForTextMarkerParameterizedAttribute = |
| @"AXNextSentenceEndTextMarkerForTextMarker"; |
| NSString* const |
| NSAccessibilityPreviousSentenceStartTextMarkerForTextMarkerParameterizedAttribute = |
| @"AXPreviousSentenceStartTextMarkerForTextMarker"; |
| NSString* const |
| NSAccessibilityNextParagraphEndTextMarkerForTextMarkerParameterizedAttribute = |
| @"AXNextParagraphEndTextMarkerForTextMarker"; |
| NSString* const |
| NSAccessibilityPreviousParagraphStartTextMarkerForTextMarkerParameterizedAttribute = |
| @"AXPreviousParagraphStartTextMarkerForTextMarker"; |
| NSString* const |
| NSAccessibilityStyleTextMarkerRangeForTextMarkerParameterizedAttribute = |
| @"AXStyleTextMarkerRangeForTextMarker"; |
| NSString* const NSAccessibilityLengthForTextMarkerRangeParameterizedAttribute = |
| @"AXLengthForTextMarkerRange"; |
| |
| // Private attributes that can be used for testing text markers, e.g. in dump |
| // tree tests. |
| NSString* const |
| NSAccessibilityTextMarkerDebugDescriptionParameterizedAttribute = |
| @"AXTextMarkerDebugDescription"; |
| NSString* const |
| NSAccessibilityTextMarkerRangeDebugDescriptionParameterizedAttribute = |
| @"AXTextMarkerRangeDebugDescription"; |
| NSString* const |
| NSAccessibilityTextMarkerNodeDebugDescriptionParameterizedAttribute = |
| @"AXTextMarkerNodeDebugDescription"; |
| |
| // Other private attributes. |
| NSString* const NSAccessibilitySelectTextWithCriteriaParameterizedAttribute = |
| @"AXSelectTextWithCriteria"; |
| NSString* const NSAccessibilityIndexForChildUIElementParameterizedAttribute = |
| @"AXIndexForChildUIElement"; |
| NSString* const NSAccessibilityValueAutofillAvailableAttribute = |
| @"AXValueAutofillAvailable"; |
| // Not currently supported by Chrome -- information not stored: |
| // NSString* const NSAccessibilityValueAutofilledAttribute = |
| // @"AXValueAutofilled"; |
| |
| // Not currently supported by Chrome -- mismatch of types supported: NSString* |
| // const NSAccessibilityValueAutofillTypeAttribute = @"AXValueAutofillType"; |
| |
| // Actions. |
| NSString* const NSAccessibilityScrollToVisibleAction = @"AXScrollToVisible"; |
| |
| // A mapping from an accessibility attribute to its method name. |
| NSDictionary* gAttributeToMethodNameMap = nil; |
| |
| // VoiceOver uses -1 to mean "no limit" for AXResultsLimit. |
| const int kAXResultsLimitNoLimit = -1; |
| |
| AXRange CreateAXRange(const BrowserAccessibility& start_object, |
| int start_offset, |
| ax::mojom::TextAffinity start_affinity, |
| const BrowserAccessibility& end_object, |
| int end_offset, |
| ax::mojom::TextAffinity end_affinity) { |
| AXPosition anchor = |
| start_object.CreatePositionAt(start_offset, start_affinity); |
| AXPosition focus = end_object.CreatePositionAt(end_offset, end_affinity); |
| // |AXRange| takes ownership of its anchor and focus. |
| return AXRange(std::move(anchor), std::move(focus)); |
| } |
| |
| AXRange GetSelectedRange(BrowserAccessibility& owner) { |
| const BrowserAccessibilityManager* manager = owner.manager(); |
| if (!manager) |
| return {}; |
| |
| const ui::AXSelection unignored_selection = |
| manager->ax_tree()->GetUnignoredSelection(); |
| int32_t anchor_id = unignored_selection.anchor_object_id; |
| const BrowserAccessibility* anchor_object = manager->GetFromID(anchor_id); |
| if (!anchor_object) |
| return {}; |
| |
| int32_t focus_id = unignored_selection.focus_object_id; |
| const BrowserAccessibility* focus_object = manager->GetFromID(focus_id); |
| if (!focus_object) |
| return {}; |
| |
| // |anchor_offset| and / or |focus_offset| refer to a character offset if |
| // |anchor_object| / |focus_object| are text-only objects or atomic text |
| // fields. Otherwise, they should be treated as child indices. An atomic text |
| // field does not expose its internal implementation to assistive software, |
| // appearing as a single leaf node in the accessibility tree. It includes |
| // <input>, <textarea> and Views-based text fields. |
| int anchor_offset = unignored_selection.anchor_offset; |
| int focus_offset = unignored_selection.focus_offset; |
| DCHECK_GE(anchor_offset, 0); |
| DCHECK_GE(focus_offset, 0); |
| |
| ax::mojom::TextAffinity anchor_affinity = unignored_selection.anchor_affinity; |
| ax::mojom::TextAffinity focus_affinity = unignored_selection.focus_affinity; |
| |
| return CreateAXRange(*anchor_object, anchor_offset, anchor_affinity, |
| *focus_object, focus_offset, focus_affinity); |
| } |
| |
| NSString* GetTextForTextMarkerRange(id marker_range) { |
| AXRange range = AXTextMarkerRangeToAXRange(marker_range); |
| if (range.IsNull()) |
| return nil; |
| return base::SysUTF16ToNSString(range.GetText()); |
| } |
| |
| // GetState checks the bitmask used in AXNodeData to check |
| // if the given state was set on the accessibility object. |
| bool GetState(BrowserAccessibility* accessibility, ax::mojom::State state) { |
| return accessibility->HasState(state); |
| } |
| |
| // Given a search key provided to AXUIElementCountForSearchPredicate or |
| // AXUIElementsForSearchPredicate, return a predicate that can be added |
| // to OneShotAccessibilityTreeSearch. |
| AccessibilityMatchPredicate PredicateForSearchKey(NSString* searchKey) { |
| if ([searchKey isEqualToString:@"AXAnyTypeSearchKey"]) { |
| return [](BrowserAccessibility* start, BrowserAccessibility* current) { |
| return true; |
| }; |
| } else if ([searchKey isEqualToString:@"AXBlockquoteSameLevelSearchKey"]) { |
| // TODO(dmazzoni): implement the "same level" part. |
| return content::AccessibilityBlockquotePredicate; |
| } else if ([searchKey isEqualToString:@"AXBlockquoteSearchKey"]) { |
| return content::AccessibilityBlockquotePredicate; |
| } else if ([searchKey isEqualToString:@"AXBoldFontSearchKey"]) { |
| return content::AccessibilityTextStyleBoldPredicate; |
| } else if ([searchKey isEqualToString:@"AXButtonSearchKey"]) { |
| return content::AccessibilityButtonPredicate; |
| } else if ([searchKey isEqualToString:@"AXCheckBoxSearchKey"]) { |
| return content::AccessibilityCheckboxPredicate; |
| } else if ([searchKey isEqualToString:@"AXControlSearchKey"]) { |
| return content::AccessibilityControlPredicate; |
| } else if ([searchKey isEqualToString:@"AXDifferentTypeSearchKey"]) { |
| return [](BrowserAccessibility* start, BrowserAccessibility* current) { |
| return current->GetRole() != start->GetRole(); |
| }; |
| } else if ([searchKey isEqualToString:@"AXFontChangeSearchKey"]) { |
| // TODO(dmazzoni): implement this. |
| return nullptr; |
| } else if ([searchKey isEqualToString:@"AXFontColorChangeSearchKey"]) { |
| // TODO(dmazzoni): implement this. |
| return nullptr; |
| } else if ([searchKey isEqualToString:@"AXFrameSearchKey"]) { |
| return content::AccessibilityFramePredicate; |
| } else if ([searchKey isEqualToString:@"AXGraphicSearchKey"]) { |
| return content::AccessibilityGraphicPredicate; |
| } else if ([searchKey isEqualToString:@"AXHeadingLevel1SearchKey"]) { |
| return content::AccessibilityH1Predicate; |
| } else if ([searchKey isEqualToString:@"AXHeadingLevel2SearchKey"]) { |
| return content::AccessibilityH2Predicate; |
| } else if ([searchKey isEqualToString:@"AXHeadingLevel3SearchKey"]) { |
| return content::AccessibilityH3Predicate; |
| } else if ([searchKey isEqualToString:@"AXHeadingLevel4SearchKey"]) { |
| return content::AccessibilityH4Predicate; |
| } else if ([searchKey isEqualToString:@"AXHeadingLevel5SearchKey"]) { |
| return content::AccessibilityH5Predicate; |
| } else if ([searchKey isEqualToString:@"AXHeadingLevel6SearchKey"]) { |
| return content::AccessibilityH6Predicate; |
| } else if ([searchKey isEqualToString:@"AXHeadingSameLevelSearchKey"]) { |
| return content::AccessibilityHeadingSameLevelPredicate; |
| } else if ([searchKey isEqualToString:@"AXHeadingSearchKey"]) { |
| return content::AccessibilityHeadingPredicate; |
| } else if ([searchKey isEqualToString:@"AXHighlightedSearchKey"]) { |
| // TODO(dmazzoni): implement this. |
| return nullptr; |
| } else if ([searchKey isEqualToString:@"AXItalicFontSearchKey"]) { |
| return content::AccessibilityTextStyleItalicPredicate; |
| } else if ([searchKey isEqualToString:@"AXLandmarkSearchKey"]) { |
| return content::AccessibilityLandmarkPredicate; |
| } else if ([searchKey isEqualToString:@"AXLinkSearchKey"]) { |
| return content::AccessibilityLinkPredicate; |
| } else if ([searchKey isEqualToString:@"AXListSearchKey"]) { |
| return content::AccessibilityListPredicate; |
| } else if ([searchKey isEqualToString:@"AXLiveRegionSearchKey"]) { |
| return content::AccessibilityLiveRegionPredicate; |
| } else if ([searchKey isEqualToString:@"AXMisspelledWordSearchKey"]) { |
| // TODO(dmazzoni): implement this. |
| return nullptr; |
| } else if ([searchKey isEqualToString:@"AXOutlineSearchKey"]) { |
| return content::AccessibilityTreePredicate; |
| } else if ([searchKey isEqualToString:@"AXPlainTextSearchKey"]) { |
| // TODO(dmazzoni): implement this. |
| return nullptr; |
| } else if ([searchKey isEqualToString:@"AXRadioGroupSearchKey"]) { |
| return content::AccessibilityRadioGroupPredicate; |
| } else if ([searchKey isEqualToString:@"AXSameTypeSearchKey"]) { |
| return [](BrowserAccessibility* start, BrowserAccessibility* current) { |
| return current->GetRole() == start->GetRole(); |
| }; |
| } else if ([searchKey isEqualToString:@"AXStaticTextSearchKey"]) { |
| return [](BrowserAccessibility* start, BrowserAccessibility* current) { |
| return current->IsText(); |
| }; |
| } else if ([searchKey isEqualToString:@"AXStyleChangeSearchKey"]) { |
| // TODO(dmazzoni): implement this. |
| return nullptr; |
| } else if ([searchKey isEqualToString:@"AXTableSameLevelSearchKey"]) { |
| // TODO(dmazzoni): implement the "same level" part. |
| return content::AccessibilityTablePredicate; |
| } else if ([searchKey isEqualToString:@"AXTableSearchKey"]) { |
| return content::AccessibilityTablePredicate; |
| } else if ([searchKey isEqualToString:@"AXTextFieldSearchKey"]) { |
| return content::AccessibilityTextfieldPredicate; |
| } else if ([searchKey isEqualToString:@"AXUnderlineSearchKey"]) { |
| return content::AccessibilityTextStyleUnderlinePredicate; |
| } else if ([searchKey isEqualToString:@"AXUnvisitedLinkSearchKey"]) { |
| return content::AccessibilityUnvisitedLinkPredicate; |
| } else if ([searchKey isEqualToString:@"AXVisitedLinkSearchKey"]) { |
| return content::AccessibilityVisitedLinkPredicate; |
| } |
| |
| return nullptr; |
| } |
| |
| // Initialize a OneShotAccessibilityTreeSearch object given the parameters |
| // passed to AXUIElementCountForSearchPredicate or |
| // AXUIElementsForSearchPredicate. Return true on success. |
| bool InitializeAccessibilityTreeSearch(OneShotAccessibilityTreeSearch* search, |
| id parameter) { |
| if (![parameter isKindOfClass:[NSDictionary class]]) |
| return false; |
| NSDictionary* dictionary = parameter; |
| |
| id startElementParameter = [dictionary objectForKey:@"AXStartElement"]; |
| if ([startElementParameter isKindOfClass:[BrowserAccessibilityCocoa class]]) { |
| BrowserAccessibilityCocoa* startNodeCocoa = |
| (BrowserAccessibilityCocoa*)startElementParameter; |
| search->SetStartNode([startNodeCocoa owner]); |
| } |
| |
| bool immediateDescendantsOnly = false; |
| NSNumber* immediateDescendantsOnlyParameter = |
| [dictionary objectForKey:@"AXImmediateDescendantsOnly"]; |
| if ([immediateDescendantsOnlyParameter isKindOfClass:[NSNumber class]]) |
| immediateDescendantsOnly = [immediateDescendantsOnlyParameter boolValue]; |
| |
| bool onscreenOnly = false; |
| // AXVisibleOnly actually means onscreen objects only -- nothing scrolled off. |
| NSNumber* onscreenOnlyParameter = [dictionary objectForKey:@"AXVisibleOnly"]; |
| if ([onscreenOnlyParameter isKindOfClass:[NSNumber class]]) |
| onscreenOnly = [onscreenOnlyParameter boolValue]; |
| |
| content::OneShotAccessibilityTreeSearch::Direction direction = |
| content::OneShotAccessibilityTreeSearch::FORWARDS; |
| NSString* directionParameter = [dictionary objectForKey:@"AXDirection"]; |
| if ([directionParameter isKindOfClass:[NSString class]]) { |
| if ([directionParameter isEqualToString:@"AXDirectionNext"]) |
| direction = content::OneShotAccessibilityTreeSearch::FORWARDS; |
| else if ([directionParameter isEqualToString:@"AXDirectionPrevious"]) |
| direction = content::OneShotAccessibilityTreeSearch::BACKWARDS; |
| } |
| |
| int resultsLimit = kAXResultsLimitNoLimit; |
| NSNumber* resultsLimitParameter = [dictionary objectForKey:@"AXResultsLimit"]; |
| if ([resultsLimitParameter isKindOfClass:[NSNumber class]]) |
| resultsLimit = [resultsLimitParameter intValue]; |
| |
| std::string searchText; |
| NSString* searchTextParameter = [dictionary objectForKey:@"AXSearchText"]; |
| if ([searchTextParameter isKindOfClass:[NSString class]]) |
| searchText = base::SysNSStringToUTF8(searchTextParameter); |
| |
| search->SetDirection(direction); |
| search->SetImmediateDescendantsOnly(immediateDescendantsOnly); |
| search->SetOnscreenOnly(onscreenOnly); |
| search->SetSearchText(searchText); |
| |
| // Mac uses resultsLimit == -1 for unlimited, that that's |
| // the default for OneShotAccessibilityTreeSearch already. |
| // Only set the results limit if it's nonnegative. |
| if (resultsLimit >= 0) |
| search->SetResultLimit(resultsLimit); |
| |
| id searchKey = [dictionary objectForKey:@"AXSearchKey"]; |
| if ([searchKey isKindOfClass:[NSString class]]) { |
| AccessibilityMatchPredicate predicate = |
| PredicateForSearchKey((NSString*)searchKey); |
| if (predicate) |
| search->AddPredicate(predicate); |
| } else if ([searchKey isKindOfClass:[NSArray class]]) { |
| size_t searchKeyCount = static_cast<size_t>([searchKey count]); |
| for (size_t i = 0; i < searchKeyCount; ++i) { |
| id key = [searchKey objectAtIndex:i]; |
| if ([key isKindOfClass:[NSString class]]) { |
| AccessibilityMatchPredicate predicate = |
| PredicateForSearchKey((NSString*)key); |
| if (predicate) |
| search->AddPredicate(predicate); |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| bool IsSelectedStateRelevant(BrowserAccessibility* item) { |
| if (!item->HasBoolAttribute(ax::mojom::BoolAttribute::kSelected)) |
| return false; // Does not have selected state -> not relevant. |
| |
| BrowserAccessibility* container = item->PlatformGetSelectionContainer(); |
| if (!container) |
| return false; // No container -> not relevant. |
| |
| if (container->HasState(ax::mojom::State::kMultiselectable)) |
| return true; // In a multiselectable -> is relevant. |
| |
| // Single selection AND not selected - > is relevant. |
| // Single selection containers can explicitly set the focused item as not |
| // selected, for example via aria-selectable="false". It's useful for the user |
| // to know that it's not selected in this case. |
| // Only do this for the focused item -- that is the only item where explicitly |
| // setting the item to unselected is relevant, as the focused item is the only |
| // item that could have been selected anyway. |
| // Therefore, if the user navigates to other items by detaching accessibility |
| // focus from the input focus via VO+Shift+F3, those items will not be |
| // redundantly reported as not selected. |
| return item->manager()->GetFocus() == item && |
| !item->GetBoolAttribute(ax::mojom::BoolAttribute::kSelected); |
| } |
| |
| } // namespace |
| |
| namespace content { |
| |
| AXTextEdit::AXTextEdit() = default; |
| AXTextEdit::AXTextEdit(std::u16string inserted_text, |
| std::u16string deleted_text, |
| id edit_text_marker) |
| : inserted_text(inserted_text), |
| deleted_text(deleted_text), |
| edit_text_marker(edit_text_marker) {} |
| AXTextEdit::AXTextEdit(const AXTextEdit& other) = default; |
| AXTextEdit::~AXTextEdit() = default; |
| |
| } // namespace content |
| |
| // Not defined in current versions of library, but may be in the future: |
| #ifndef NSAccessibilityLanguageAttribute |
| #define NSAccessibilityLanguageAttribute @"AXLanguage" |
| #endif |
| |
| bool content::IsNSRange(id value) { |
| return [value isKindOfClass:[NSValue class]] && |
| 0 == strcmp([value objCType], @encode(NSRange)); |
| } |
| |
| @implementation BrowserAccessibilityCocoa { |
| // Dangling pointer https://crbug.com/1475830. |
| raw_ptr<content::BrowserAccessibility, DanglingUntriaged> _owner; |
| // An array of children of this object. Cached to avoid re-computing. |
| NSMutableArray* __strong _children; |
| // Whether the children have changed and need to be updated. |
| bool _needsToUpdateChildren; |
| // Whether _children is currently being computed. |
| bool _gettingChildren; |
| // Stores the previous value of an edit field. |
| std::u16string _oldValue; |
| } |
| |
| + (void)initialize { |
| const struct { |
| NSString* attribute; |
| NSString* methodName; |
| } attributeToMethodNameContainer[] = { |
| {NSAccessibilityChildrenAttribute, @"children"}, |
| {NSAccessibilityColumnsAttribute, @"columns"}, |
| {NSAccessibilityColumnIndexRangeAttribute, @"columnIndexRange"}, |
| {NSAccessibilityContentsAttribute, @"contents"}, |
| {NSAccessibilityDisclosingAttribute, @"disclosing"}, |
| {NSAccessibilityDisclosedByRowAttribute, @"disclosedByRow"}, |
| {NSAccessibilityDisclosureLevelAttribute, @"disclosureLevel"}, |
| {NSAccessibilityDisclosedRowsAttribute, @"disclosedRows"}, |
| {NSAccessibilityEnabledAttribute, @"enabled"}, |
| {NSAccessibilityEndTextMarkerAttribute, @"endTextMarker"}, |
| {NSAccessibilityExpandedAttribute, @"expanded"}, |
| {NSAccessibilityFocusedAttribute, @"focused"}, |
| {NSAccessibilityHeaderAttribute, @"header"}, |
| {NSAccessibilityIndexAttribute, @"index"}, |
| {NSAccessibilityInsertionPointLineNumberAttribute, |
| @"insertionPointLineNumber"}, |
| {NSAccessibilityLanguageAttribute, @"language"}, |
| {NSAccessibilityLinkedUIElementsAttribute, @"linkedUIElements"}, |
| {NSAccessibilityMaxValueAttribute, @"maxValue"}, |
| {NSAccessibilityMinValueAttribute, @"minValue"}, |
| {NSAccessibilityNumberOfCharactersAttribute, @"numberOfCharacters"}, |
| {NSAccessibilityOrientationAttribute, @"orientation"}, |
| {NSAccessibilityParentAttribute, @"parent"}, |
| {NSAccessibilityPositionAttribute, @"position"}, |
| {NSAccessibilityRoleAttribute, @"role"}, |
| {NSAccessibilityRowHeaderUIElementsAttribute, @"rowHeaders"}, |
| {NSAccessibilityRowIndexRangeAttribute, @"rowIndexRange"}, |
| {NSAccessibilityRowsAttribute, @"accessibilityRows"}, |
| // TODO(aboxhall): expose |
| // NSAccessibilityServesAsTitleForUIElementsAttribute |
| {NSAccessibilityStartTextMarkerAttribute, @"startTextMarker"}, |
| {NSAccessibilitySelectedChildrenAttribute, @"selectedChildren"}, |
| {NSAccessibilitySelectedTextAttribute, @"selectedText"}, |
| {NSAccessibilitySelectedTextRangeAttribute, @"selectedTextRange"}, |
| {NSAccessibilitySelectedTextMarkerRangeAttribute, |
| @"selectedTextMarkerRange"}, |
| {NSAccessibilitySortDirectionAttribute, @"sortDirection"}, |
| {NSAccessibilitySubroleAttribute, @"subrole"}, |
| {NSAccessibilityTabsAttribute, @"tabs"}, |
| {NSAccessibilityTopLevelUIElementAttribute, @"window"}, |
| {NSAccessibilityValueAttribute, @"value"}, |
| {NSAccessibilityValueAutofillAvailableAttribute, |
| @"valueAutofillAvailable"}, |
| // Not currently supported by Chrome -- information not stored: |
| // {NSAccessibilityValueAutofilledAttribute, @"valueAutofilled"}, |
| // Not currently supported by Chrome -- mismatch of types supported: |
| // {NSAccessibilityValueAutofillTypeAttribute, @"valueAutofillType"}, |
| {NSAccessibilityValueDescriptionAttribute, @"valueDescription"}, |
| {NSAccessibilityVisibleCharacterRangeAttribute, @"visibleCharacterRange"}, |
| {NSAccessibilityVisibleCellsAttribute, @"visibleCells"}, |
| {NSAccessibilityVisibleChildrenAttribute, @"visibleChildren"}, |
| {NSAccessibilityVisibleColumnsAttribute, @"visibleColumns"}, |
| {NSAccessibilityVisibleRowsAttribute, @"visibleRows"}, |
| {NSAccessibilityWindowAttribute, @"window"}, |
| }; |
| |
| NSMutableDictionary* dict = [[NSMutableDictionary alloc] init]; |
| for (const auto& item : attributeToMethodNameContainer) { |
| dict[item.attribute] = item.methodName; |
| } |
| gAttributeToMethodNameMap = dict; |
| } |
| |
| - (instancetype)initWithObject:(BrowserAccessibility*)accessibility |
| withPlatformNode:(ui::AXPlatformNodeMac*)platform_node { |
| if ((self = [super initWithNode:platform_node])) { |
| _owner = accessibility; |
| _needsToUpdateChildren = true; |
| _gettingChildren = false; |
| } |
| return self; |
| } |
| |
| - (void)detach { |
| if (!_owner) |
| return; |
| |
| _owner = nullptr; |
| [super detach]; |
| } |
| |
| - (NSArray*)AXChildren { |
| return [self children]; |
| } |
| |
| // Returns an array of BrowserAccessibilityCocoa objects, representing the |
| // accessibility children of this object. |
| - (NSArray*)children { |
| if (![self instanceActive]) |
| return nil; |
| if (_needsToUpdateChildren) { |
| base::AutoReset<bool> set_getting_children(&_gettingChildren, true); |
| // PlatformChildCount may add extra mac nodes if the node requires them. |
| uint32_t childCount = _owner->PlatformChildCount(); |
| _children = [[NSMutableArray alloc] initWithCapacity:childCount]; |
| for (auto it = _owner->PlatformChildrenBegin(); |
| it != _owner->PlatformChildrenEnd(); ++it) { |
| AXPlatformNodeCocoa* child = it->GetNativeViewAccessible(); |
| if ([child isIncludedInPlatformTree]) |
| [_children addObject:child]; |
| else |
| [_children addObjectsFromArray:[child accessibilityChildren]]; |
| } |
| |
| // Also, add indirect children (if any). |
| const std::vector<int32_t>& indirectChildIds = _owner->GetIntListAttribute( |
| ax::mojom::IntListAttribute::kIndirectChildIds); |
| for (uint32_t i = 0; i < indirectChildIds.size(); ++i) { |
| int32_t child_id = indirectChildIds[i]; |
| BrowserAccessibility* child = _owner->manager()->GetFromID(child_id); |
| |
| // This only became necessary as a result of crbug.com/93095. It should be |
| // a DCHECK in the future. |
| if (child) |
| [_children addObject:child->GetNativeViewAccessible()]; |
| } |
| _needsToUpdateChildren = false; |
| } |
| return _children; |
| } |
| |
| - (void)childrenChanged { |
| // This function may be called in the middle of children() if this node adds |
| // extra mac nodes while its children are being requested. If _gettingChildren |
| // is true, we don't need to do anything here. |
| if (![self instanceActive] || _gettingChildren) |
| return; |
| _needsToUpdateChildren = true; |
| if (![self isIncludedInPlatformTree]) { |
| BrowserAccessibility* parent = _owner->PlatformGetParent(); |
| if (parent) |
| [parent->GetNativeViewAccessible() childrenChanged]; |
| } |
| } |
| |
| - (NSValue*)columnIndexRange { |
| if (![self instanceActive]) |
| return nil; |
| |
| std::optional<int> column = _owner->node()->GetTableCellColIndex(); |
| std::optional<int> colspan = _owner->node()->GetTableCellColSpan(); |
| if (column && colspan) |
| return [NSValue valueWithRange:NSMakeRange(*column, *colspan)]; |
| return nil; |
| } |
| |
| - (NSArray*)columns { |
| if (![self instanceActive]) |
| return nil; |
| NSMutableArray* ret = [[NSMutableArray alloc] init]; |
| for (AXPlatformNodeCocoa* child in [self accessibilityChildren]) { |
| if ([[child accessibilityRole] isEqualToString:NSAccessibilityColumnRole]) |
| [ret addObject:child]; |
| } |
| return ret; |
| } |
| |
| - (BrowserAccessibility*)containingTable { |
| BrowserAccessibility* table = _owner; |
| while (table && !ui::IsTableLike(table->GetRole())) { |
| table = table->PlatformGetParent(); |
| } |
| return table; |
| } |
| |
| - (NSNumber*)disclosing { |
| if (![self instanceActive]) |
| return nil; |
| if ([self internalRole] == ax::mojom::Role::kTreeItem) { |
| return @(GetState(_owner, ax::mojom::State::kExpanded)); |
| } else { |
| return nil; |
| } |
| } |
| |
| - (id)disclosedByRow { |
| if (![self instanceActive]) |
| return nil; |
| |
| // The row that contains this row. |
| // It should be the same as the first parent that is a treeitem. |
| return nil; |
| } |
| |
| - (NSNumber*)disclosureLevel { |
| if (![self instanceActive]) |
| return nil; |
| ax::mojom::Role role = [self internalRole]; |
| if (role == ax::mojom::Role::kRow || role == ax::mojom::Role::kTreeItem || |
| role == ax::mojom::Role::kHeading) { |
| int level = |
| _owner->GetIntAttribute(ax::mojom::IntAttribute::kHierarchicalLevel); |
| // Mac disclosureLevel is 0-based, but web levels are 1-based. |
| if (level > 0) |
| level--; |
| return @(level); |
| } else { |
| return nil; |
| } |
| } |
| |
| - (id)disclosedRows { |
| if (![self instanceActive]) |
| return nil; |
| |
| // The rows that are considered inside this row. |
| return nil; |
| } |
| |
| - (NSNumber*)enabled { |
| if (![self instanceActive]) |
| return nil; |
| return @(_owner->GetData().GetRestriction() != |
| ax::mojom::Restriction::kDisabled); |
| } |
| |
| // Returns a text marker that points to the last character in the document that |
| // can be selected with VoiceOver. |
| - (id)endTextMarker { |
| if (![self instanceActive]) |
| return nil; |
| AXPosition position = _owner->CreateTextPositionAt(0); |
| return AXPositionToAXTextMarker(position->CreatePositionAtEndOfContent()); |
| } |
| |
| - (NSNumber*)expanded { |
| if (![self instanceActive]) |
| return nil; |
| return @(GetState(_owner, ax::mojom::State::kExpanded)); |
| } |
| |
| - (NSNumber*)focused { |
| if (![self instanceActive]) |
| return nil; |
| BrowserAccessibilityManager* manager = _owner->manager(); |
| return @(manager->GetFocus() == _owner); |
| } |
| |
| - (id)header { |
| if (![self instanceActive]) |
| return nil; |
| int headerElementId = -1; |
| if (ui::IsTableLike(_owner->GetRole())) { |
| // The table header container is always the last child of the table, |
| // if it exists. The table header container is a special node in the |
| // accessibility tree only used on macOS. It has all of the table |
| // headers as its children, even though those cells are also children |
| // of rows in the table. Internally this is implemented using |
| // AXTableInfo and indirect_child_ids. |
| uint32_t childCount = _owner->PlatformChildCount(); |
| if (childCount > 0) { |
| BrowserAccessibility* tableHeader = _owner->PlatformGetLastChild(); |
| if (tableHeader->GetRole() == ax::mojom::Role::kTableHeaderContainer) |
| return tableHeader->GetNativeViewAccessible(); |
| } |
| } else if ([self internalRole] == ax::mojom::Role::kColumn) { |
| _owner->GetIntAttribute(ax::mojom::IntAttribute::kTableColumnHeaderId, |
| &headerElementId); |
| } else if ([self internalRole] == ax::mojom::Role::kRow) { |
| _owner->GetIntAttribute(ax::mojom::IntAttribute::kTableRowHeaderId, |
| &headerElementId); |
| } |
| |
| if (headerElementId > 0) { |
| BrowserAccessibility* headerObject = |
| _owner->manager()->GetFromID(headerElementId); |
| if (headerObject) |
| return headerObject->GetNativeViewAccessible(); |
| } |
| return nil; |
| } |
| |
| - (NSNumber*)index { |
| if (![self instanceActive]) |
| return nil; |
| |
| if ([self internalRole] == ax::mojom::Role::kTreeItem) { |
| return [self treeItemRowIndex]; |
| } else if ([self internalRole] == ax::mojom::Role::kColumn) { |
| DCHECK(_owner->node()); |
| std::optional<int> col_index = *_owner->node()->GetTableColColIndex(); |
| if (col_index) |
| return @(*col_index); |
| } else if ([self internalRole] == ax::mojom::Role::kRow) { |
| DCHECK(_owner->node()); |
| std::optional<int> row_index = _owner->node()->GetTableRowRowIndex(); |
| if (row_index) |
| return @(*row_index); |
| } |
| |
| return nil; |
| } |
| |
| - (NSNumber*)treeItemRowIndex { |
| if (![self instanceActive]) |
| return nil; |
| |
| DCHECK([self internalRole] == ax::mojom::Role::kTreeItem); |
| DCHECK([[self role] isEqualToString:NSAccessibilityRowRole]); |
| |
| // First find an ancestor that establishes this tree or treegrid. We |
| // will search in this ancestor to calculate our row index. |
| BrowserAccessibility* container = [self owner]->PlatformGetParent(); |
| while (container && container->GetRole() != ax::mojom::Role::kTree && |
| container->GetRole() != ax::mojom::Role::kTreeGrid) { |
| container = container->PlatformGetParent(); |
| } |
| if (!container) |
| return nil; |
| |
| const BrowserAccessibilityCocoa* cocoaContainer = |
| container->GetNativeViewAccessible(); |
| int currentIndex = 0; |
| if ([cocoaContainer findRowIndex:self withCurrentIndex:¤tIndex]) { |
| return @(currentIndex); |
| } |
| |
| return nil; |
| } |
| |
| - (bool)findRowIndex:(BrowserAccessibilityCocoa*)toFind |
| withCurrentIndex:(int*)currentIndex { |
| if (![self instanceActive]) |
| return false; |
| |
| DCHECK([[toFind accessibilityRole] isEqualToString:NSAccessibilityRowRole]); |
| for (BrowserAccessibilityCocoa* childToCheck in |
| [self accessibilityChildren]) { |
| if ([toFind isEqual:childToCheck]) { |
| return true; |
| } |
| |
| if ([[childToCheck accessibilityRole] |
| isEqualToString:NSAccessibilityRowRole]) { |
| ++(*currentIndex); |
| } |
| |
| if ([childToCheck findRowIndex:toFind withCurrentIndex:currentIndex]) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| - (NSNumber*)AXInsertionPointLineNumber { |
| return [self insertionPointLineNumber]; |
| } |
| |
| - (NSNumber*)insertionPointLineNumber { |
| if (![self instanceActive]) |
| return nil; |
| if (!_owner->HasVisibleCaretOrSelection()) |
| return nil; |
| |
| const AXRange range = GetSelectedRange(*_owner); |
| |
| // If the selection is not collapsed, then there is no visible caret. |
| if (!range.IsCollapsed()) |
| return nil; |
| |
| // "ax::mojom::MoveDirection" is only relevant on platforms that use object |
| // replacement characters in the accessibility tree. Mac is not one of them. |
| const AXPosition caretPosition = range.focus()->LowestCommonAncestorPosition( |
| *_owner->CreateTextPositionAt(0), ax::mojom::MoveDirection::kForward); |
| DCHECK(!caretPosition->IsNullPosition()) |
| << "Calling HasVisibleCaretOrSelection() should have ensured that there " |
| "is a valid selection focus inside the current object."; |
| const std::vector<int> lineStarts = |
| _owner->GetIntListAttribute(ax::mojom::IntListAttribute::kLineStarts); |
| |
| // Find the text offset that starts the next line after the current caret |
| // position, then subtract 1 to get the current line number. |
| auto iterator = |
| std::upper_bound(lineStarts.begin(), lineStarts.end(), |
| caretPosition->AsTextPosition()->text_offset()); |
| |
| // If the caret is on a single line and the line is empty, then |
| // the iterator will be equal to lineStarts.begin() because the lineStarts |
| // vector will be empty. The line number should be 0 in this case. |
| if (iterator == lineStarts.begin()) |
| return @(0); |
| |
| return @(std::distance(lineStarts.begin(), std::prev(iterator))); |
| } |
| |
| - (NSString*)language { |
| if (![self instanceActive]) |
| return nil; |
| ui::AXNode* node = _owner->node(); |
| DCHECK(node); |
| return base::SysUTF8ToNSString(node->GetLanguage()); |
| } |
| |
| // private |
| - (void)addLinkedUIElementsFromAttribute:(ax::mojom::IntListAttribute)attribute |
| addTo:(NSMutableArray*)outArray { |
| const std::vector<int32_t>& attributeValues = |
| _owner->GetIntListAttribute(attribute); |
| for (size_t i = 0; i < attributeValues.size(); ++i) { |
| BrowserAccessibility* element = |
| _owner->manager()->GetFromID(attributeValues[i]); |
| if (element) |
| [outArray addObject:element->GetNativeViewAccessible()]; |
| } |
| } |
| |
| // private |
| - (NSArray*)linkedUIElements { |
| NSMutableArray* ret = [[NSMutableArray alloc] init]; |
| [self |
| addLinkedUIElementsFromAttribute:ax::mojom::IntListAttribute::kControlsIds |
| addTo:ret]; |
| [self addLinkedUIElementsFromAttribute:ax::mojom::IntListAttribute::kFlowtoIds |
| addTo:ret]; |
| |
| int target_id; |
| if (_owner->GetIntAttribute(ax::mojom::IntAttribute::kInPageLinkTargetId, |
| &target_id)) { |
| BrowserAccessibility* target = |
| _owner->manager()->GetFromID(static_cast<int32_t>(target_id)); |
| if (target) |
| [ret addObject:target->GetNativeViewAccessible()]; |
| } |
| |
| [self addLinkedUIElementsFromAttribute:ax::mojom::IntListAttribute:: |
| kRadioGroupIds |
| addTo:ret]; |
| return ret; |
| } |
| |
| - (NSNumber*)maxValue { |
| if (![self instanceActive]) |
| return nil; |
| |
| if (!_owner->HasFloatAttribute(ax::mojom::FloatAttribute::kValueForRange)) |
| return @0; // Indeterminate value exposes AXMinValue/AXMaxValue of 0. |
| |
| float floatValue = |
| _owner->GetFloatAttribute(ax::mojom::FloatAttribute::kMaxValueForRange); |
| return @(floatValue); |
| } |
| |
| - (NSNumber*)minValue { |
| if (![self instanceActive]) |
| return nil; |
| |
| if (!_owner->HasFloatAttribute(ax::mojom::FloatAttribute::kValueForRange)) |
| return @0; // Indeterminate value exposes AXMinValue/AXMaxValue of 0. |
| |
| float floatValue = |
| _owner->GetFloatAttribute(ax::mojom::FloatAttribute::kMinValueForRange); |
| return @(floatValue); |
| } |
| |
| - (NSString*)orientation { |
| if (![self instanceActive]) |
| return nil; |
| if (GetState(_owner, ax::mojom::State::kVertical)) |
| return NSAccessibilityVerticalOrientationValue; |
| else if (GetState(_owner, ax::mojom::State::kHorizontal)) |
| return NSAccessibilityHorizontalOrientationValue; |
| |
| return @""; |
| } |
| |
| - (NSNumber*)AXNumberOfCharacters { |
| return [self numberOfCharacters]; |
| } |
| |
| - (NSNumber*)numberOfCharacters { |
| if ([self instanceActive] && _owner->IsTextField()) |
| return @(static_cast<int>(_owner->GetValueForControl().size())); |
| return nil; |
| } |
| |
| - (id)parent { |
| if (![self instanceActive]) |
| return nil; |
| if (_owner->PlatformGetParent()) { |
| id unignored_parent = NSAccessibilityUnignoredAncestor( |
| _owner->PlatformGetParent()->GetNativeViewAccessible()); |
| DCHECK(unignored_parent); |
| return unignored_parent; |
| } |
| |
| // A nil parent means we're the root. |
| // Hook back up to RenderWidgetHostViewCocoa. |
| BrowserAccessibilityManagerMac* manager = |
| _owner->manager() |
| ->GetManagerForRootFrame() |
| ->ToBrowserAccessibilityManagerMac(); |
| if (!manager) { |
| // TODO(accessibility) Determine why this is happening. |
| DCHECK(false); |
| return nil; |
| } |
| SANITIZER_CHECK(manager->GetParentView()); |
| return manager->GetParentView(); |
| } |
| |
| - (NSValue*)position { |
| if (![self instanceActive]) |
| return nil; |
| NSPoint pointInScreen = [self accessibilityFrame].origin; |
| return [NSValue valueWithPoint:pointInScreen]; |
| } |
| |
| - (content::BrowserAccessibility*)owner { |
| return _owner; |
| } |
| |
| // Assumes that there is at most one insertion, deletion or replacement at once. |
| // TODO(nektar): Merge this method with |
| // |BrowserAccessibilityAndroid::CommonEndLengths|. |
| - (content::AXTextEdit)computeTextEdit { |
| if (!_owner->IsTextField()) |
| return content::AXTextEdit(); |
| |
| // Starting from macOS 10.11, if the user has edited some text we need to |
| // dispatch the actual text that changed on the value changed notification. |
| // We run this code on all macOS versions to get the highest test coverage. |
| std::u16string oldValue = _oldValue; |
| std::u16string newValue = _owner->CreateTextPositionAt(0)->GetText( |
| ui::AXEmbeddedObjectBehavior::kSuppressCharacter); |
| _oldValue = newValue; |
| if (oldValue.empty() && newValue.empty()) |
| return content::AXTextEdit(); |
| |
| size_t i; |
| size_t j; |
| // Sometimes Blink doesn't use the same UTF16 characters to represent |
| // whitespace. |
| for (i = 0; |
| i < oldValue.length() && i < newValue.length() && |
| (oldValue[i] == newValue[i] || (base::IsUnicodeWhitespace(oldValue[i]) && |
| base::IsUnicodeWhitespace(newValue[i]))); |
| ++i) { |
| } |
| for (j = 0; |
| (i + j) < oldValue.length() && (i + j) < newValue.length() && |
| (oldValue[oldValue.length() - j - 1] == |
| newValue[newValue.length() - j - 1] || |
| (base::IsUnicodeWhitespace(oldValue[oldValue.length() - j - 1]) && |
| base::IsUnicodeWhitespace(newValue[newValue.length() - j - 1]))); |
| ++j) { |
| } |
| DCHECK_LE(i + j, oldValue.length()); |
| DCHECK_LE(i + j, newValue.length()); |
| |
| std::u16string deletedText = oldValue.substr(i, oldValue.length() - i - j); |
| std::u16string insertedText = newValue.substr(i, newValue.length() - i - j); |
| |
| // Heuristic for editable combobox. If more than 1 character is inserted or |
| // deleted, and the caret is at the end of the field, assume the entire text |
| // field changed. |
| // TODO(nektar) Remove this once editing intents are implemented, |
| // and the actual inserted and deleted text is passed over from Blink. |
| if ([self internalRole] == ax::mojom::Role::kTextFieldWithComboBox && |
| (deletedText.length() > 1 || insertedText.length() > 1)) { |
| int sel_start, sel_end; |
| _owner->GetIntAttribute(ax::mojom::IntAttribute::kTextSelStart, &sel_start); |
| _owner->GetIntAttribute(ax::mojom::IntAttribute::kTextSelEnd, &sel_end); |
| if (static_cast<size_t>(sel_start) == newValue.length() && |
| static_cast<size_t>(sel_end) == newValue.length()) { |
| // Don't include oldValue as it would be announced -- very confusing. |
| return content::AXTextEdit(newValue, std::u16string(), nil); |
| } |
| } |
| return content::AXTextEdit( |
| insertedText, deletedText, |
| AXPositionToAXTextMarker(_owner->CreateTextPositionAt(i))); |
| } |
| |
| // internal |
| - (NSRect)rectInScreen:(gfx::Rect)layout_rect { |
| if (![self instanceActive]) |
| return NSZeroRect; |
| |
| auto rect = ScaleToRoundedRect( |
| layout_rect, 1.f / _owner->manager()->device_scale_factor()); |
| |
| // Get the delegate for the topmost BrowserAccessibilityManager, because |
| // that's the only one that can convert points to their origin in the screen. |
| ui::AXPlatformTreeManagerDelegate* delegate = |
| _owner->manager()->GetDelegateFromRootManager(); |
| if (delegate) { |
| return gfx::ScreenRectToNSRect( |
| rect + delegate->AccessibilityGetViewBounds().OffsetFromOrigin()); |
| } else { |
| return NSZeroRect; |
| } |
| } |
| |
| // Returns a string indicating the NSAccessibility role of this object. |
| - (NSString*)AXRole { |
| return [self role]; |
| } |
| - (NSString*)role { |
| if (![self instanceActive]) { |
| TRACE_EVENT0("accessibility", "BrowserAccessibilityCocoa::role nil"); |
| return nil; |
| } |
| |
| NSString* cocoa_role = nil; |
| ax::mojom::Role role = [self internalRole]; |
| if (role == ax::mojom::Role::kCanvas && |
| _owner->GetBoolAttribute(ax::mojom::BoolAttribute::kCanvasHasFallback)) { |
| cocoa_role = NSAccessibilityGroupRole; |
| } else if (_owner->IsTextField() && |
| _owner->HasState(ax::mojom::State::kMultiline) && |
| !_owner->GetData().IsSpinnerTextField()) { |
| cocoa_role = NSAccessibilityTextAreaRole; |
| } else if (ui::IsImage(_owner->GetRole()) && _owner->GetChildCount()) { |
| // An image map is an image with children, and exposed on Mac as a group. |
| cocoa_role = NSAccessibilityGroupRole; |
| } else if (ui::IsImage(_owner->GetRole()) && |
| _owner->HasExplicitlyEmptyName()) { |
| cocoa_role = NSAccessibilityUnknownRole; |
| } else if (_owner->IsRootWebAreaForPresentationalIframe()) { |
| cocoa_role = NSAccessibilityGroupRole; |
| } else { |
| cocoa_role = [AXPlatformNodeCocoa nativeRoleFromAXRole:role]; |
| } |
| |
| TRACE_EVENT1("accessibility", "BrowserAccessibilityCocoa::role", |
| "role=", base::SysNSStringToUTF8(cocoa_role)); |
| return cocoa_role; |
| } |
| |
| - (NSArray*)rowHeaders { |
| if (![self instanceActive]) |
| return nil; |
| |
| bool is_cell_or_table_header = ui::IsCellOrTableHeader(_owner->GetRole()); |
| bool is_table_like = ui::IsTableLike(_owner->GetRole()); |
| if (!is_table_like && !is_cell_or_table_header) |
| return nil; |
| BrowserAccessibility* table = [self containingTable]; |
| if (!table) |
| return nil; |
| |
| NSMutableArray* ret = [[NSMutableArray alloc] init]; |
| |
| if (is_table_like) { |
| // If this is a table, return all row headers. |
| std::set<int32_t> headerIds; |
| for (int i = 0; i < *table->GetTableRowCount(); i++) { |
| std::vector<int32_t> rowHeaderIds = table->GetRowHeaderNodeIds(i); |
| for (int32_t id : rowHeaderIds) |
| headerIds.insert(id); |
| } |
| for (int32_t id : headerIds) { |
| BrowserAccessibility* cell = _owner->manager()->GetFromID(id); |
| if (cell) |
| [ret addObject:cell->GetNativeViewAccessible()]; |
| } |
| } else { |
| // Otherwise this is a cell, return the row headers for this cell. |
| for (int32_t id : _owner->node()->GetTableCellRowHeaderNodeIds()) { |
| BrowserAccessibility* cell = _owner->manager()->GetFromID(id); |
| if (cell) |
| [ret addObject:cell->GetNativeViewAccessible()]; |
| } |
| } |
| |
| return [ret count] ? ret : nil; |
| } |
| |
| - (NSValue*)rowIndexRange { |
| if (![self instanceActive]) |
| return nil; |
| |
| std::optional<int> row = _owner->node()->GetTableCellRowIndex(); |
| std::optional<int> rowspan = _owner->node()->GetTableCellRowSpan(); |
| if (row && rowspan) |
| return [NSValue valueWithRange:NSMakeRange(*row, *rowspan)]; |
| return nil; |
| } |
| |
| - (NSArray*)accessibilityRows { |
| if (![self instanceActive]) |
| return nil; |
| NSMutableArray* ret = [[NSMutableArray alloc] init]; |
| |
| std::vector<int32_t> node_id_list; |
| if (_owner->GetRole() == ax::mojom::Role::kTree) |
| [self getTreeItemDescendantNodeIds:&node_id_list]; |
| else if (ui::IsTableLike(_owner->GetRole())) |
| node_id_list = _owner->node()->GetTableRowNodeIds(); |
| // Rows attribute for a column is the list of all the elements in that column |
| // at each row. |
| else if ([self internalRole] == ax::mojom::Role::kColumn) |
| node_id_list = _owner->GetIntListAttribute( |
| ax::mojom::IntListAttribute::kIndirectChildIds); |
| |
| for (int32_t node_id : node_id_list) { |
| BrowserAccessibility* rowElement = _owner->manager()->GetFromID(node_id); |
| if (rowElement) |
| [ret addObject:rowElement->GetNativeViewAccessible()]; |
| } |
| |
| return ret; |
| } |
| |
| - (NSArray*)selectedChildren { |
| if (![self instanceActive]) |
| return nil; |
| |
| NSMutableArray* ret = [[NSMutableArray alloc] init]; |
| BrowserAccessibility* focusedChild = _owner->manager()->GetFocus(); |
| |
| // "IsDescendantOf" also returns true when the two objects are equivalent. |
| if (focusedChild && focusedChild != _owner && |
| focusedChild->IsDescendantOf(_owner)) { |
| // If this container is not multi-selectable, try to skip iterating over the |
| // children because there could only be at most one selected child. The |
| // selected child should also be equivalent to the focused child, because |
| // selection is tethered to the focus. |
| if (!GetState(_owner, ax::mojom::State::kMultiselectable) && |
| focusedChild->GetBoolAttribute(ax::mojom::BoolAttribute::kSelected)) { |
| [ret addObject:focusedChild->GetNativeViewAccessible()]; |
| return ret; |
| } |
| |
| // If this container is multi-selectable, the focused child should be |
| // the first item in the list of selected children regardless of whether |
| // it is selected or not, because this is how VoiceOver determines where to |
| // draw the focus ring around the active item. |
| // |
| // Not appending this item when focused but not selected would result in |
| // VoiceOver's focus ring jumping to the first selected item. It's unclear |
| // if this is by design or not, but VoiceOver folks confirmed offline that |
| // Safari always append the focused item, whether selected or not, to the |
| // list of selected items. |
| if (GetState(_owner, ax::mojom::State::kMultiselectable)) |
| [ret addObject:focusedChild->GetNativeViewAccessible()]; |
| } |
| |
| // If this container is multi-selectable, we need to return any additional |
| // children (other than the focused child) with the "selected" state. If this |
| // container is not multi-selectable, but none of its children have the focus, |
| // we need to return all its children with the "selected" state. |
| for (auto it = _owner->PlatformChildrenBegin(); |
| it != _owner->PlatformChildrenEnd(); ++it) { |
| BrowserAccessibility* child = it.get(); |
| if (child->GetBoolAttribute(ax::mojom::BoolAttribute::kSelected) && |
| child != focusedChild) { |
| [ret addObject:child->GetNativeViewAccessible()]; |
| } |
| } |
| |
| return ret; |
| } |
| |
| - (NSString*)AXSelectedText { |
| return [self selectedText]; |
| } |
| |
| - (NSString*)selectedText { |
| if (![self instanceActive]) |
| return nil; |
| if (!_owner->HasVisibleCaretOrSelection()) |
| return nil; |
| |
| const AXRange range = GetSelectedRange(*_owner); |
| if (range.IsNull()) |
| return nil; |
| return base::SysUTF16ToNSString(range.GetText()); |
| } |
| |
| - (NSValue*)AXSelectedTextRange { |
| return [self selectedTextRange]; |
| } |
| |
| // Returns range of text under the current object that is selected. |
| // |
| // Example, caret at offset 5: |
| // NSRange: “pos=5 len=0” |
| - (NSValue*)selectedTextRange { |
| if (![self instanceActive]) |
| return nil; |
| if (!_owner->HasVisibleCaretOrSelection()) |
| return nil; |
| |
| const AXRange range = GetSelectedRange(*_owner).AsForwardRange(); |
| if (range.IsNull()) |
| return nil; |
| |
| // "ax::mojom::MoveDirection" is only relevant on platforms that use object |
| // replacement characters in the accessibility tree. Mac is not one of them. |
| const AXPosition startPosition = range.anchor()->LowestCommonAncestorPosition( |
| *_owner->CreateTextPositionAt(0), ax::mojom::MoveDirection::kForward); |
| DCHECK(!startPosition->IsNullPosition()) |
| << "Calling HasVisibleCaretOrSelection() should have ensured that there " |
| "is a valid selection anchor inside the current object."; |
| int selStart = startPosition->AsTextPosition()->text_offset(); |
| DCHECK_GE(selStart, 0); |
| int selLength = range.GetText().length(); |
| return [NSValue valueWithRange:NSMakeRange(selStart, selLength)]; |
| } |
| |
| - (void)setAccessibilitySelectedTextRange:(NSRange)range { |
| if (![self instanceActive]) |
| return; |
| |
| BrowserAccessibilityManager* manager = _owner->manager(); |
| manager->SetSelection(BrowserAccessibility::AXRange( |
| _owner->CreateTextPositionAt(range.location)->AsDomSelectionPosition(), |
| _owner->CreateTextPositionAt(NSMaxRange(range)) |
| ->AsDomSelectionPosition())); |
| } |
| |
| - (id)selectedTextMarkerRange { |
| if (![self instanceActive]) |
| return nil; |
| AXRange ax_range = GetSelectedRange(*_owner); |
| if (ax_range.IsNull()) |
| return nil; |
| |
| return AXRangeToAXTextMarkerRange(std::move(ax_range)); |
| } |
| |
| - (NSString*)sortDirection { |
| if (![self instanceActive]) |
| return nil; |
| int sortDirection; |
| if (!_owner->GetIntAttribute(ax::mojom::IntAttribute::kSortDirection, |
| &sortDirection)) |
| return nil; |
| |
| switch (static_cast<ax::mojom::SortDirection>(sortDirection)) { |
| case ax::mojom::SortDirection::kUnsorted: |
| return nil; |
| case ax::mojom::SortDirection::kAscending: |
| return NSAccessibilityAscendingSortDirectionValue; |
| case ax::mojom::SortDirection::kDescending: |
| return NSAccessibilityDescendingSortDirectionValue; |
| case ax::mojom::SortDirection::kOther: |
| return NSAccessibilityUnknownSortDirectionValue; |
| default: |
| NOTREACHED_IN_MIGRATION(); |
| } |
| |
| return nil; |
| } |
| |
| // Returns a text marker that points to the first character in the document that |
| // can be selected with VoiceOver. |
| - (id)startTextMarker { |
| if (![self instanceActive]) |
| return nil; |
| AXPosition position = _owner->CreateTextPositionAt(0); |
| return AXPositionToAXTextMarker(position->CreatePositionAtStartOfContent()); |
| } |
| |
| - (NSString*)AXSubrole { |
| return [self subrole]; |
| } |
| |
| // Returns a subrole based upon the role. |
| - (NSString*)subrole { |
| if (![self instanceActive]) |
| return nil; |
| |
| if (_owner->IsAtomicTextField() && |
| GetState(_owner, ax::mojom::State::kProtected)) { |
| return NSAccessibilitySecureTextFieldSubrole; |
| } |
| |
| if ([self internalRole] == ax::mojom::Role::kDescriptionList) |
| return NSAccessibilityDefinitionListSubrole; |
| |
| if ([self internalRole] == ax::mojom::Role::kDirectoryDeprecated || |
| [self internalRole] == ax::mojom::Role::kList) { |
| return NSAccessibilityContentListSubrole; |
| } |
| |
| return [AXPlatformNodeCocoa nativeSubroleFromAXRole:[self internalRole]]; |
| } |
| |
| // Returns all tabs in this subtree. |
| - (NSArray*)tabs { |
| if (![self instanceActive]) |
| return nil; |
| NSMutableArray* tabSubtree = [[NSMutableArray alloc] init]; |
| |
| if ([self internalRole] == ax::mojom::Role::kTab) |
| [tabSubtree addObject:self]; |
| |
| for (uint i = 0; i < [[self children] count]; ++i) { |
| NSArray* tabChildren = [[[self children] objectAtIndex:i] tabs]; |
| if ([tabChildren count] > 0) |
| [tabSubtree addObjectsFromArray:tabChildren]; |
| } |
| |
| return tabSubtree; |
| } |
| |
| - (id)AXValue { |
| return [self value]; |
| } |
| - (id)value { |
| if (![self instanceActive]) |
| return nil; |
| |
| DCHECK(_owner->node()->IsDataValid()); |
| |
| if (ui::IsNameExposedInAXValueForRole([self internalRole])) { |
| std::u16string name = _owner->GetTextContentUTF16(); |
| // Leaf node with aria-label will have empty text content. |
| // e.g. <div role="option" aria-label="label">content</div> |
| // So we use its computed name for AXValue. |
| if (name.empty()) |
| name = _owner->GetNameAsString16(); |
| if (!IsSelectedStateRelevant(_owner)) { |
| return base::SysUTF16ToNSString(name); |
| } |
| |
| // Append the selection state as a string, because VoiceOver will not |
| // automatically report selection state when an individual item is focused. |
| bool is_selected = |
| _owner->GetBoolAttribute(ax::mojom::BoolAttribute::kSelected); |
| int msg_id = |
| is_selected ? IDS_AX_OBJECT_SELECTED : IDS_AX_OBJECT_NOT_SELECTED; |
| ContentClient* content_client = content::GetContentClient(); |
| std::u16string name_with_selection = base::ReplaceStringPlaceholders( |
| content_client->GetLocalizedString(msg_id), {name}, nullptr); |
| |
| return base::SysUTF16ToNSString(name_with_selection); |
| } |
| |
| NSString* role = [self role]; |
| if ([role isEqualToString:@"AXHeading"]) { |
| int level = 0; |
| if (_owner->GetIntAttribute(ax::mojom::IntAttribute::kHierarchicalLevel, |
| &level)) { |
| return @(level); |
| } |
| } else if ([role isEqualToString:NSAccessibilityButtonRole]) { |
| // AXValue does not make sense for pure buttons. |
| return @""; |
| } else if ([self isCheckable]) { |
| int value; |
| const auto checkedState = _owner->GetData().GetCheckedState(); |
| switch (checkedState) { |
| case ax::mojom::CheckedState::kTrue: |
| value = 1; |
| break; |
| case ax::mojom::CheckedState::kMixed: |
| value = 2; |
| break; |
| default: |
| value = _owner->GetBoolAttribute(ax::mojom::BoolAttribute::kSelected) |
| ? 1 |
| : 0; |
| break; |
| } |
| return @(value); |
| } else if (_owner->GetData().IsRangeValueSupported()) { |
| // Objects that support range values include progress bars, sliders, and |
| // steppers. Only the native value or aria-valuenow should be exposed, not |
| // the aria-valuetext. Aria-valuetext is exposed via |
| // "accessibilityValueDescription". |
| float floatValue; |
| if (_owner->GetFloatAttribute(ax::mojom::FloatAttribute::kValueForRange, |
| &floatValue)) { |
| return @(floatValue); |
| } |
| } else if ([role isEqualToString:NSAccessibilityColorWellRole]) { |
| unsigned int color = static_cast<unsigned int>( |
| _owner->GetIntAttribute(ax::mojom::IntAttribute::kColorValue)); |
| unsigned int red = SkColorGetR(color); |
| unsigned int green = SkColorGetG(color); |
| unsigned int blue = SkColorGetB(color); |
| // This string matches the one returned by a native Mac color well. |
| return [NSString stringWithFormat:@"rgb %7.5f %7.5f %7.5f 1", red / 255., |
| green / 255., blue / 255.]; |
| } |
| |
| return base::SysUTF16ToNSString(_owner->GetValueForControl()); |
| } |
| |
| - (NSNumber*)valueAutofillAvailable { |
| if (![self instanceActive]) |
| return nil; |
| return _owner->HasState(ax::mojom::State::kAutofillAvailable) ? @YES : @NO; |
| } |
| |
| // Not currently supported, as Chrome does not store whether an autofill |
| // occurred. We could have autofill fire an event, however, and set an |
| // "is_autofilled" flag until the next edit. - (NSNumber*)valueAutofilled { |
| // return @NO; |
| // } |
| |
| // Not currently supported, as Chrome's autofill types aren't like Safari's. |
| // - (NSString*)valueAutofillType { |
| // return @"none"; |
| //} |
| |
| - (NSString*)valueDescription { |
| if (![self instanceActive] || !_owner->GetData().IsRangeValueSupported()) |
| return nil; |
| |
| // This method is only for exposing aria-valuetext to VoiceOver if present. |
| // Blink places the value of aria-valuetext in |
| // ax::mojom::StringAttribute::kValue for objects that support range values, |
| // i.e., progress bars, sliders and steppers. |
| return base::SysUTF8ToNSString( |
| _owner->GetStringAttribute(ax::mojom::StringAttribute::kValue)); |
| } |
| |
| - (NSValue*)AXVisibleCharacterRange { |
| return [self visibleCharacterRange]; |
| } |
| |
| - (NSValue*)visibleCharacterRange { |
| if ([self instanceActive] && _owner->IsTextField() && |
| !_owner->IsPasswordField()) { |
| return [NSValue |
| valueWithRange:NSMakeRange(0, |
| static_cast<int>( |
| _owner->GetValueForControl().size()))]; |
| } |
| return nil; |
| } |
| |
| - (NSArray*)visibleCells { |
| if (![self instanceActive]) |
| return nil; |
| |
| NSMutableArray* ret = [[NSMutableArray alloc] init]; |
| for (int32_t id : _owner->node()->GetTableUniqueCellIds()) { |
| BrowserAccessibility* cell = _owner->manager()->GetFromID(id); |
| if (cell) |
| [ret addObject:cell->GetNativeViewAccessible()]; |
| } |
| return ret; |
| } |
| |
| - (NSArray*)visibleChildren { |
| if (![self instanceActive]) |
| return nil; |
| return [self children]; |
| } |
| |
| - (NSArray*)visibleColumns { |
| if (![self instanceActive]) |
| return nil; |
| return [self columns]; |
| } |
| |
| - (NSArray*)visibleRows { |
| if (![self instanceActive]) |
| return nil; |
| return [self accessibilityRows]; |
| } |
| |
| - (id)window { |
| if (![self instanceActive]) |
| return nil; |
| |
| BrowserAccessibilityManagerMac* root_manager = |
| _owner->manager() |
| ->GetManagerForRootFrame() |
| ->ToBrowserAccessibilityManagerMac(); |
| if (!root_manager) { |
| // TODO(crbug.com/40234203) Find out why this happens -- there should always |
| // be a root manager whenever an object is instanceActive. This used to be a |
| // CHECK() but caused too many crashes, with unknown cause. |
| return nil; |
| } |
| if (!root_manager->GetParentView()) { |
| // TODO(crbug.com/40898856) Find out why this happens, there should always |
| // be a parent view. This used to be a CHECK() but caused too many crashes. |
| // Repro steps are available in the bug. |
| return nil; |
| } |
| return root_manager->GetWindow(); // Can be null for inactive tabs. |
| } |
| |
| - (void)getTreeItemDescendantNodeIds:(std::vector<int32_t>*)tree_item_ids { |
| for (auto it = _owner->PlatformChildrenBegin(); |
| it != _owner->PlatformChildrenEnd(); ++it) { |
| const BrowserAccessibilityCocoa* child = it->GetNativeViewAccessible(); |
| |
| if ([child internalRole] == ax::mojom::Role::kTreeItem) { |
| tree_item_ids->push_back([child hash]); |
| } |
| [child getTreeItemDescendantNodeIds:tree_item_ids]; |
| } |
| } |
| |
| - (NSString*)methodNameForAttribute:(NSString*)attribute { |
| return [gAttributeToMethodNameMap objectForKey:attribute]; |
| } |
| |
| - (NSString*)valueForRange:(NSRange)range { |
| if (![self instanceActive]) |
| return nil; |
| |
| std::u16string textContent = _owner->GetTextContentUTF16(); |
| if (NSMaxRange(range) > textContent.length()) |
| return nil; |
| |
| return base::SysUTF16ToNSString( |
| textContent.substr(range.location, range.length)); |
| } |
| |
| - (NSRect)frameForRange:(NSRange)range { |
| if (!_owner->IsText() && !_owner->IsAtomicTextField()) |
| return CGRectNull; |
| gfx::Rect rect = _owner->GetUnclippedRootFrameInnerTextRangeBoundsRect( |
| range.location, NSMaxRange(range)); |
| return [self rectInScreen:rect]; |
| } |
| |
| // Returns the accessibility value for the given attribute. If the value isn't |
| // supported this will return nil. |
| - (id)accessibilityAttributeValue:(NSString*)attribute { |
| TRACE_EVENT2("accessibility", |
| "BrowserAccessibilityCocoa::accessibilityAttributeValue", |
| "role=", ui::ToString([self internalRole]), |
| "attribute=", base::SysNSStringToUTF8(attribute)); |
| if (![self instanceActive]) |
| return nil; |
| |
| SEL selector = NSSelectorFromString([self methodNameForAttribute:attribute]); |
| if (selector) |
| #pragma clang diagnostic push |
| #pragma clang diagnostic ignored "-Warc-performSelector-leaks" |
| return [self performSelector:selector]; |
| #pragma clang diagnostic pop |
| |
| return [super accessibilityAttributeValue:attribute]; |
| } |
| |
| - (id)AXStringForRange:(id)parameter { |
| DCHECK([parameter isKindOfClass:[NSValue class]]); |
| return [self valueForRange:[(NSValue*)parameter rangeValue]]; |
| } |
| |
| - (id)AXLineForIndex:(id)parameter { |
| DCHECK([parameter isKindOfClass:[NSNumber class]]); |
| int lineIndex = [(NSNumber*)parameter intValue]; |
| const std::vector<int> lineStarts = |
| _owner->GetIntListAttribute(ax::mojom::IntListAttribute::kLineStarts); |
| auto iterator = |
| std::lower_bound(lineStarts.begin(), lineStarts.end(), lineIndex); |
| return @(std::distance(lineStarts.begin(), iterator)); |
| } |
| |
| - (id)AXRangeForLine:(id)parameter { |
| DCHECK([parameter isKindOfClass:[NSNumber class]]); |
| if (!_owner->IsTextField()) |
| return nil; |
| |
| int lineIndex = [(NSNumber*)parameter intValue]; |
| const std::vector<int> lineStarts = |
| _owner->GetIntListAttribute(ax::mojom::IntListAttribute::kLineStarts); |
| std::u16string value = _owner->GetValueForControl(); |
| int valueLength = static_cast<int>(value.size()); |
| |
| int lineCount = static_cast<int>(lineStarts.size()); |
| if (lineIndex < 0 || lineIndex >= lineCount) |
| return nil; |
| int start = lineStarts[lineIndex]; |
| int end = |
| (lineIndex < (lineCount - 1)) ? lineStarts[lineIndex + 1] : valueLength; |
| return [NSValue valueWithRange:NSMakeRange(start, end - start)]; |
| } |
| |
| // Returns the accessibility value for the given attribute and parameter. If the |
| // value isn't supported this will return nil. |
| - (id)accessibilityAttributeValue:(NSString*)attribute |
| forParameter:(id)parameter { |
| if (parameter && [parameter isKindOfClass:[NSNumber self]]) { |
| TRACE_EVENT2( |
| "accessibility", |
| "BrowserAccessibilityCocoa::accessibilityAttributeValue:forParameter", |
| "role=", ui::ToString([self internalRole]), "attribute=", |
| base::SysNSStringToUTF8(attribute) + |
| " parameter=" + base::SysNSStringToUTF8([parameter stringValue])); |
| } else { |
| TRACE_EVENT2( |
| "accessibility", |
| "BrowserAccessibilityCocoa::accessibilityAttributeValue:forParameter", |
| "role=", ui::ToString([self internalRole]), |
| "attribute=", base::SysNSStringToUTF8(attribute)); |
| } |
| |
| if (![self instanceActive]) |
| return nil; |
| |
| if ([attribute isEqualToString: |
| NSAccessibilityStringForRangeParameterizedAttribute]) { |
| return [self AXStringForRange:parameter]; |
| } |
| |
| if ([attribute |
| isEqualToString:NSAccessibilityLineForIndexParameterizedAttribute]) { |
| return [self AXLineForIndex:parameter]; |
| } |
| |
| if ([attribute |
| isEqualToString:NSAccessibilityRangeForLineParameterizedAttribute]) { |
| return [self AXRangeForLine:parameter]; |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityCellForColumnAndRowParameterizedAttribute]) { |
| if (!ui::IsTableLike([self internalRole])) |
| return nil; |
| if (![parameter isKindOfClass:[NSArray class]]) |
| return nil; |
| if (2 != [parameter count]) |
| return nil; |
| NSArray* array = parameter; |
| int column = [[array objectAtIndex:0] intValue]; |
| int row = [[array objectAtIndex:1] intValue]; |
| |
| ui::AXNode* cellNode = _owner->node()->GetTableCellFromCoords(row, column); |
| if (!cellNode) |
| return nil; |
| |
| BrowserAccessibility* cell = _owner->manager()->GetFromID(cellNode->id()); |
| if (cell) |
| return cell->GetNativeViewAccessible(); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityUIElementForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (!position->IsNullPosition()) { |
| BrowserAccessibility* ui_element = |
| _owner->manager()->GetFromAXNode(position->GetAnchor()); |
| if (ui_element) |
| return ui_element->GetNativeViewAccessible(); |
| } |
| |
| return nil; |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityTextMarkerRangeForUIElementParameterizedAttribute]) { |
| if (![parameter isKindOfClass:[AXPlatformNodeCocoa class]]) |
| return nil; |
| |
| BrowserAccessibility* parameter_owner = |
| [(BrowserAccessibilityCocoa*)parameter owner]; |
| if (!parameter_owner) |
| return nil; |
| |
| AXPosition startPosition = parameter_owner->CreateTextPositionAt(0); |
| AXPosition endPosition = startPosition->CreatePositionAtEndOfAnchor(); |
| AXRange range = AXRange(std::move(startPosition), std::move(endPosition)); |
| return AXRangeToAXTextMarkerRange(std::move(range)); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityStringForTextMarkerRangeParameterizedAttribute]) |
| return GetTextForTextMarkerRange(parameter); |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityNextTextMarkerForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| return AXPositionToAXTextMarker( |
| position->CreateNextCharacterPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kCrossBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition))); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityPreviousTextMarkerForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| return AXPositionToAXTextMarker( |
| position->CreatePreviousCharacterPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kCrossBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition))); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityLeftWordTextMarkerRangeForTextMarkerParameterizedAttribute]) { |
| AXPosition endPosition = AXTextMarkerToAXPosition(parameter); |
| if (endPosition->IsNullPosition()) |
| return nil; |
| |
| AXPosition startWordPosition = |
| endPosition->CreatePreviousWordStartPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kStopAtAnchorBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition)); |
| AXPosition endWordPosition = |
| endPosition->CreatePreviousWordEndPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kStopAtAnchorBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition)); |
| AXPosition startPosition = *startWordPosition <= *endWordPosition |
| ? std::move(endWordPosition) |
| : std::move(startWordPosition); |
| AXRange range(std::move(startPosition), std::move(endPosition)); |
| return AXRangeToAXTextMarkerRange(std::move(range)); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityRightWordTextMarkerRangeForTextMarkerParameterizedAttribute]) { |
| AXPosition startPosition = AXTextMarkerToAXPosition(parameter); |
| if (startPosition->IsNullPosition()) |
| return nil; |
| |
| AXPosition endWordPosition = |
| startPosition->CreateNextWordEndPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kStopAtAnchorBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition)); |
| AXPosition startWordPosition = |
| startPosition->CreateNextWordStartPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kStopAtAnchorBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition)); |
| AXPosition endPosition = *startWordPosition <= *endWordPosition |
| ? std::move(startWordPosition) |
| : std::move(endWordPosition); |
| AXRange range(std::move(startPosition), std::move(endPosition)); |
| return AXRangeToAXTextMarkerRange(std::move(range)); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityNextWordEndTextMarkerForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| return AXPositionToAXTextMarker( |
| position->CreateNextWordEndPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kCrossBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition))); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityPreviousWordStartTextMarkerForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| return AXPositionToAXTextMarker( |
| position->CreatePreviousWordStartPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kCrossBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition))); |
| } |
| |
| if ([attribute isEqualToString: |
| NSAccessibilityLineForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| |
| int textOffset = position->AsTextPosition()->text_offset(); |
| const std::vector<int> lineStarts = |
| _owner->GetIntListAttribute(ax::mojom::IntListAttribute::kLineStarts); |
| const auto iterator = |
| std::lower_bound(lineStarts.begin(), lineStarts.end(), textOffset); |
| return @(std::distance(lineStarts.begin(), iterator)); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityTextMarkerRangeForLineParameterizedAttribute]) { |
| int lineIndex = [(NSNumber*)parameter intValue]; |
| const std::vector<int> lineStarts = |
| _owner->GetIntListAttribute(ax::mojom::IntListAttribute::kLineStarts); |
| int lineCount = static_cast<int>(lineStarts.size()); |
| if (lineIndex < 0 || lineIndex >= lineCount) |
| return nil; |
| |
| int lineStartOffset = lineStarts[lineIndex]; |
| AXPosition lineStartPosition = _owner->CreateTextPositionAt( |
| lineStartOffset, ax::mojom::TextAffinity::kDownstream); |
| if (lineStartPosition->IsNullPosition()) |
| return nil; |
| |
| // Make sure that the line start position is really at the start of the |
| // current line. |
| lineStartPosition = lineStartPosition->CreatePreviousLineStartPosition( |
| ui::AXMovementOptions(ui::AXBoundaryBehavior::kStopAtAnchorBoundary, |
| ui::AXBoundaryDetection::kCheckInitialPosition)); |
| AXPosition lineEndPosition = |
| lineStartPosition->CreateNextLineEndPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kStopAtAnchorBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition)); |
| AXRange range(std::move(lineStartPosition), std::move(lineEndPosition)); |
| return AXRangeToAXTextMarkerRange(std::move(range)); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityLeftLineTextMarkerRangeForTextMarkerParameterizedAttribute]) { |
| AXPosition endPosition = AXTextMarkerToAXPosition(parameter); |
| if (endPosition->IsNullPosition()) |
| return nil; |
| |
| AXPosition startLinePosition = |
| endPosition->CreatePreviousLineStartPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kStopAtLastAnchorBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition)); |
| AXPosition endLinePosition = |
| endPosition->CreatePreviousLineEndPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kStopAtLastAnchorBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition)); |
| AXPosition startPosition = *startLinePosition <= *endLinePosition |
| ? std::move(endLinePosition) |
| : std::move(startLinePosition); |
| AXRange range(std::move(startPosition), std::move(endPosition)); |
| return AXRangeToAXTextMarkerRange(std::move(range)); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityRightLineTextMarkerRangeForTextMarkerParameterizedAttribute]) { |
| AXPosition startPosition = AXTextMarkerToAXPosition(parameter); |
| if (startPosition->IsNullPosition()) |
| return nil; |
| |
| AXPosition startLinePosition = |
| startPosition->CreateNextLineStartPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kStopAtLastAnchorBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition)); |
| AXPosition endLinePosition = |
| startPosition->CreateNextLineEndPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kStopAtLastAnchorBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition)); |
| AXPosition endPosition = *startLinePosition <= *endLinePosition |
| ? std::move(startLinePosition) |
| : std::move(endLinePosition); |
| AXRange range(std::move(startPosition), std::move(endPosition)); |
| return AXRangeToAXTextMarkerRange(std::move(range)); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityNextLineEndTextMarkerForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| return AXPositionToAXTextMarker( |
| position->CreateNextLineEndPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kCrossBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition))); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityPreviousLineStartTextMarkerForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| return AXPositionToAXTextMarker( |
| position->CreatePreviousLineStartPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kCrossBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition))); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilitySentenceTextMarkerRangeForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| |
| AXRange range = position->ExpandToEnclosingTextBoundary( |
| ax::mojom::TextBoundary::kSentenceStartOrEnd, |
| ui::AXRangeExpandBehavior::kLeftFirst); |
| return AXRangeToAXTextMarkerRange(std::move(range)); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityParagraphTextMarkerRangeForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| |
| AXRange range = position->ExpandToEnclosingTextBoundary( |
| ax::mojom::TextBoundary::kParagraphStartOrEnd, |
| ui::AXRangeExpandBehavior::kLeftFirst); |
| return AXRangeToAXTextMarkerRange(std::move(range)); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityNextParagraphEndTextMarkerForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| return AXPositionToAXTextMarker( |
| position->CreateNextParagraphEndPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kCrossBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition))); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityPreviousParagraphStartTextMarkerForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| return AXPositionToAXTextMarker( |
| position->CreatePreviousParagraphStartPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kCrossBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition))); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityStyleTextMarkerRangeForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| |
| AXPosition startPosition = position->CreatePreviousFormatStartPosition( |
| ui::AXMovementOptions(ui::AXBoundaryBehavior::kStopAtAnchorBoundary, |
| ui::AXBoundaryDetection::kCheckInitialPosition)); |
| AXPosition endPosition = position->CreateNextFormatEndPosition( |
| ui::AXMovementOptions(ui::AXBoundaryBehavior::kStopAtAnchorBoundary, |
| ui::AXBoundaryDetection::kCheckInitialPosition)); |
| AXRange range(std::move(startPosition), std::move(endPosition)); |
| return AXRangeToAXTextMarkerRange(std::move(range)); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityLengthForTextMarkerRangeParameterizedAttribute]) { |
| NSString* text = GetTextForTextMarkerRange(parameter); |
| return @([text length]); |
| } |
| |
| if ([attribute isEqualToString: |
| NSAccessibilityTextMarkerIsValidParameterizedAttribute]) { |
| return @(AXTextMarkerToAXPosition(parameter)->IsNullPosition()); |
| } |
| |
| if ([attribute isEqualToString: |
| NSAccessibilityIndexForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| return @(position->AsTextPosition()->text_offset()); |
| } |
| |
| if ([attribute isEqualToString: |
| NSAccessibilityTextMarkerForIndexParameterizedAttribute]) { |
| int index = [static_cast<NSNumber*>(parameter) intValue]; |
| if (index < 0) |
| return nil; |
| |
| const BrowserAccessibility* root = |
| _owner->manager()->GetBrowserAccessibilityRoot(); |
| if (!root) |
| return nil; |
| |
| return AXPositionToAXTextMarker(root->CreateTextPositionAt(index)); |
| } |
| |
| if ([attribute isEqualToString: |
| NSAccessibilityBoundsForRangeParameterizedAttribute]) { |
| NSRect rect = [self frameForRange:[(NSValue*)parameter rangeValue]]; |
| return CGRectIsNull(rect) ? nil : [NSValue valueWithRect:rect]; |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityUIElementCountForSearchPredicateParameterizedAttribute]) { |
| OneShotAccessibilityTreeSearch search(_owner); |
| if (InitializeAccessibilityTreeSearch(&search, parameter)) |
| return @(search.CountMatches()); |
| return nil; |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityUIElementsForSearchPredicateParameterizedAttribute]) { |
| OneShotAccessibilityTreeSearch search(_owner); |
| if (InitializeAccessibilityTreeSearch(&search, parameter)) { |
| size_t count = search.CountMatches(); |
| NSMutableArray* result = [NSMutableArray arrayWithCapacity:count]; |
| for (size_t i = 0; i < count; ++i) { |
| BrowserAccessibility* match = search.GetMatchAtIndex(i); |
| [result addObject:match->GetNativeViewAccessible()]; |
| } |
| return result; |
| } |
| return nil; |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityLineTextMarkerRangeForTextMarkerParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return nil; |
| |
| // If the initial position is between lines, e.g. if it is on a soft line |
| // break or on an ignored position that separates lines, we have to return |
| // the previous line. This is what Safari does. |
| // |
| // Note that hard line breaks are on a line of their own. |
| AXPosition startPosition = position->CreatePreviousLineStartPosition( |
| ui::AXMovementOptions(ui::AXBoundaryBehavior::kStopAtAnchorBoundary, |
| ui::AXBoundaryDetection::kCheckInitialPosition)); |
| AXPosition endPosition = |
| startPosition->CreateNextLineStartPosition(ui::AXMovementOptions( |
| ui::AXBoundaryBehavior::kStopAtLastAnchorBoundary, |
| ui::AXBoundaryDetection::kDontCheckInitialPosition)); |
| AXRange range(std::move(startPosition), std::move(endPosition)); |
| return AXRangeToAXTextMarkerRange(std::move(range)); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityBoundsForTextMarkerRangeParameterizedAttribute]) { |
| BrowserAccessibility* startObject; |
| BrowserAccessibility* endObject; |
| int startOffset, endOffset; |
| AXRange range = AXTextMarkerRangeToAXRange(parameter); |
| if (range.IsNull()) |
| return nil; |
| |
| const AXPosition anchor = range.anchor()->AsTextPosition(); |
| const AXPosition focus = range.focus()->AsTextPosition(); |
| if (!anchor || !focus) { |
| return nil; |
| } |
| |
| startObject = _owner->manager()->GetFromAXNode(anchor->GetAnchor()); |
| endObject = _owner->manager()->GetFromAXNode(focus->GetAnchor()); |
| startOffset = anchor->text_offset(); |
| endOffset = focus->text_offset(); |
| DCHECK(startObject && endObject); |
| DCHECK_GE(startOffset, 0); |
| DCHECK_GE(endOffset, 0); |
| if (!startObject || !endObject || startOffset < 0 || endOffset < 0) |
| return nil; |
| |
| gfx::Rect rect = |
| BrowserAccessibilityManager::GetRootFrameInnerTextRangeBoundsRect( |
| *startObject, startOffset, *endObject, endOffset); |
| NSRect nsrect = [self rectInScreen:rect]; |
| return [NSValue valueWithRect:nsrect]; |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityTextMarkerRangeForUnorderedTextMarkersParameterizedAttribute]) { |
| if (![parameter isKindOfClass:[NSArray class]]) |
| return nil; |
| |
| NSArray* textMarkerArray = parameter; |
| if ([textMarkerArray count] != 2) |
| return nil; |
| |
| AXPosition startPosition = |
| AXTextMarkerToAXPosition([textMarkerArray objectAtIndex:0]); |
| AXPosition endPosition = |
| AXTextMarkerToAXPosition([textMarkerArray objectAtIndex:1]); |
| if (*startPosition <= *endPosition) { |
| return AXRangeToAXTextMarkerRange( |
| AXRange(std::move(startPosition), std::move(endPosition))); |
| } else { |
| return AXRangeToAXTextMarkerRange( |
| AXRange(std::move(endPosition), std::move(startPosition))); |
| } |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityTextMarkerDebugDescriptionParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| return base::SysUTF8ToNSString(position->ToString()); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityTextMarkerRangeDebugDescriptionParameterizedAttribute]) { |
| AXRange range = AXTextMarkerRangeToAXRange(parameter); |
| return base::SysUTF8ToNSString(range.ToString()); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityTextMarkerNodeDebugDescriptionParameterizedAttribute]) { |
| AXPosition position = AXTextMarkerToAXPosition(parameter); |
| if (position->IsNullPosition()) |
| return @"nil"; |
| DCHECK(position->GetAnchor()); |
| return base::SysUTF8ToNSString(position->GetAnchor()->data().ToString()); |
| } |
| |
| if ([attribute |
| isEqualToString: |
| NSAccessibilityIndexForChildUIElementParameterizedAttribute]) { |
| if (![parameter isKindOfClass:[AXPlatformNodeCocoa class]]) |
| return nil; |
| |
| BrowserAccessibilityCocoa* childCocoaObj = |
| (BrowserAccessibilityCocoa*)parameter; |
| BrowserAccessibility* child = [childCocoaObj owner]; |
| if (!child) |
| return nil; |
| |
| if (child->PlatformGetParent() != _owner) |
| return nil; |
| |
| return @(child->GetIndexInParent().value()); |
| } |
| |
| return [super accessibilityAttributeValue:attribute forParameter:parameter]; |
| } |
| |
| // Returns an array of parameterized attributes names that this object will |
| // respond to. |
| - (NSArray*)accessibilityParameterizedAttributeNames { |
| TRACE_EVENT1( |
| "accessibility", |
| "BrowserAccessibilityCocoa::accessibilityParameterizedAttributeNames", |
| "role=", ui::ToString([self internalRole])); |
| if (![self instanceActive]) |
| return nil; |
| |
| // General attributes. |
| NSMutableArray* ret = [@[ |
| NSAccessibilityUIElementForTextMarkerParameterizedAttribute, |
| NSAccessibilityTextMarkerRangeForUIElementParameterizedAttribute, |
| NSAccessibilityLineForTextMarkerParameterizedAttribute, |
| NSAccessibilityTextMarkerRangeForLineParameterizedAttribute, |
| NSAccessibilityStringForTextMarkerRangeParameterizedAttribute, |
| NSAccessibilityTextMarkerForPositionParameterizedAttribute, |
| NSAccessibilityBoundsForTextMarkerRangeParameterizedAttribute, |
| NSAccessibilityAttributedStringForTextMarkerRangeWithOptionsParameterizedAttribute, |
| NSAccessibilityTextMarkerRangeForUnorderedTextMarkersParameterizedAttribute, |
| NSAccessibilityNextTextMarkerForTextMarkerParameterizedAttribute, |
| NSAccessibilityPreviousTextMarkerForTextMarkerParameterizedAttribute, |
| NSAccessibilityLeftWordTextMarkerRangeForTextMarkerParameterizedAttribute, |
| NSAccessibilityRightWordTextMarkerRangeForTextMarkerParameterizedAttribute, |
| NSAccessibilityLeftLineTextMarkerRangeForTextMarkerParameterizedAttribute, |
| NSAccessibilityRightLineTextMarkerRangeForTextMarkerParameterizedAttribute, |
| NSAccessibilitySentenceTextMarkerRangeForTextMarkerParameterizedAttribute, |
| NSAccessibilityParagraphTextMarkerRangeForTextMarkerParameterizedAttribute, |
| NSAccessibilityNextWordEndTextMarkerForTextMarkerParameterizedAttribute, |
| NSAccessibilityPreviousWordStartTextMarkerForTextMarkerParameterizedAttribute, |
| NSAccessibilityNextLineEndTextMarkerForTextMarkerParameterizedAttribute, |
| NSAccessibilityPreviousLineStartTextMarkerForTextMarkerParameterizedAttribute, |
| NSAccessibilityNextSentenceEndTextMarkerForTextMarkerParameterizedAttribute, |
| NSAccessibilityPreviousSentenceStartTextMarkerForTextMarkerParameterizedAttribute, |
| NSAccessibilityNextParagraphEndTextMarkerForTextMarkerParameterizedAttribute, |
| NSAccessibilityPreviousParagraphStartTextMarkerForTextMarkerParameterizedAttribute, |
| NSAccessibilityStyleTextMarkerRangeForTextMarkerParameterizedAttribute, |
| NSAccessibilityLengthForTextMarkerRangeParameterizedAttribute, |
| NSAccessibilityEndTextMarkerForBoundsParameterizedAttribute, |
| NSAccessibilityStartTextMarkerForBoundsParameterizedAttribute, |
| NSAccessibilityLineTextMarkerRangeForTextMarkerParameterizedAttribute, |
| NSAccessibilityIndexForChildUIElementParameterizedAttribute, |
| NSAccessibilityBoundsForRangeParameterizedAttribute, |
| NSAccessibilityStringForRangeParameterizedAttribute, |
| NSAccessibilityUIElementCountForSearchPredicateParameterizedAttribute, |
| NSAccessibilityUIElementsForSearchPredicateParameterizedAttribute, |
| NSAccessibilitySelectTextWithCriteriaParameterizedAttribute |
| ] mutableCopy]; |
| |
| if ([[self role] isEqualToString:NSAccessibilityTableRole] || |
| [[self role] isEqualToString:NSAccessibilityGridRole]) { |
| [ret addObject:NSAccessibilityCellForColumnAndRowParameterizedAttribute]; |
| } |
| |
| if (_owner->HasState(ax::mojom::State::kEditable)) { |
| [ret addObjectsFromArray:@[ |
| NSAccessibilityLineForIndexParameterizedAttribute, |
| NSAccessibilityRangeForLineParameterizedAttribute, |
| NSAccessibilityStringForRangeParameterizedAttribute, |
| NSAccessibilityRangeForPositionParameterizedAttribute, |
| NSAccessibilityRangeForIndexParameterizedAttribute, |
| NSAccessibilityBoundsForRangeParameterizedAttribute, |
| NSAccessibilityRTFForRangeParameterizedAttribute, |
| NSAccessibilityStyleRangeForIndexParameterizedAttribute |
| ]]; |
| } |
| |
| if ([self internalRole] == ax::mojom::Role::kStaticText) |
| [ret addObject:NSAccessibilityBoundsForRangeParameterizedAttribute]; |
| |
| if (ui::IsPlatformDocument(_owner->GetRole())) { |
| [ret addObjectsFromArray:@[ |
| NSAccessibilityTextMarkerIsValidParameterizedAttribute, |
| NSAccessibilityIndexForTextMarkerParameterizedAttribute, |
| NSAccessibilityTextMarkerForIndexParameterizedAttribute |
| ]]; |
| } |
| |
| NSArray* super_ret = [super accessibilityParameterizedAttributeNames]; |
| [ret addObjectsFromArray:super_ret]; |
| return ret; |
| } |
| |
| // Returns an array of action names that this object will respond to. |
| - (NSArray*)accessibilityActionNames { |
| TRACE_EVENT1("accessibility", |
| "BrowserAccessibilityCocoa::accessibilityActionNames", |
| "role=", ui::ToString([self internalRole])); |
| if (![self instanceActive]) |
| return nil; |
| |
| NSMutableArray* actions = [NSMutableArray |
| arrayWithObjects:NSAccessibilityShowMenuAction, |
| NSAccessibilityScrollToVisibleAction, nil]; |
| |
| // VoiceOver expects the "press" action to be first. |
| if (_owner->IsClickable()) |
| [actions insertObject:NSAccessibilityPressAction atIndex:0]; |
| |
| if (ui::IsMenuRelated(_owner->GetRole())) |
| [actions addObject:NSAccessibilityCancelAction]; |
| |
| if ([self internalRole] == ax::mojom::Role::kSlider || |
| [self internalRole] == ax::mojom::Role::kSpinButton) { |
| [actions addObjectsFromArray:@[ |
| NSAccessibilityIncrementAction, NSAccessibilityDecrementAction |
| ]]; |
| } |
| |
| return actions; |
| } |
| |
| // Returns the list of accessibility attributes that this object supports. |
| - (NSArray*)accessibilityAttributeNames { |
| TRACE_EVENT1("accessibility", |
| "BrowserAccessibilityCocoa::accessibilityAttributeNames", |
| "role=", ui::ToString([self internalRole])); |
| if (![self instanceActive]) |
| return nil; |
| |
| // General attributes. |
| NSMutableArray* ret = [@[ |
| NSAccessibilityChildrenAttribute, NSAccessibilityEnabledAttribute, |
| NSAccessibilityEndTextMarkerAttribute, NSAccessibilityFocusedAttribute, |
| NSAccessibilityLinkedUIElementsAttribute, NSAccessibilityParentAttribute, |
| NSAccessibilityPositionAttribute, NSAccessibilityRoleAttribute, |
| NSAccessibilityRoleDescriptionAttribute, |
| NSAccessibilitySelectedTextMarkerRangeAttribute, |
| NSAccessibilityStartTextMarkerAttribute, NSAccessibilitySubroleAttribute, |
| NSAccessibilityTopLevelUIElementAttribute, NSAccessibilityValueAttribute, |
| NSAccessibilityWindowAttribute |
| ] mutableCopy]; |
| |
| // Specific role attributes. |
| NSString* role = [self role]; |
| NSString* subrole = [self subrole]; |
| if ([role isEqualToString:NSAccessibilityTableRole] || |
| [role isEqualToString:NSAccessibilityGridRole]) { |
| [ret addObjectsFromArray:@[ |
| NSAccessibilityColumnsAttribute, |
| NSAccessibilityVisibleColumnsAttribute, |
| NSAccessibilityRowsAttribute, |
| NSAccessibilityVisibleRowsAttribute, |
| NSAccessibilityVisibleCellsAttribute, |
| NSAccessibilityHeaderAttribute, |
| NSAccessibilityRowHeaderUIElementsAttribute, |
| ]]; |
| } else if ([role isEqualToString:NSAccessibilityColumnRole]) { |
| [ret addObjectsFromArray:@[ |
| NSAccessibilityIndexAttribute, NSAccessibilityHeaderAttribute, |
| NSAccessibilityRowsAttribute, NSAccessibilityVisibleRowsAttribute |
| ]]; |
| } else if ([role isEqualToString:NSAccessibilityCellRole]) { |
| [ret addObjectsFromArray:@[ |
| NSAccessibilityColumnIndexRangeAttribute, |
| NSAccessibilityRowIndexRangeAttribute, |
| @"AXSortDirection", |
| ]]; |
| if ([self internalRole] != ax::mojom::Role::kRowHeader) |
| [ret addObject:NSAccessibilityRowHeaderUIElementsAttribute]; |
| } else if ([role isEqualToString:NSAccessibilityTabGroupRole]) { |
| [ret addObject:NSAccessibilityTabsAttribute]; |
| } else if (_owner->GetData().IsRangeValueSupported()) { |
| [ret addObjectsFromArray:@[ |
| NSAccessibilityMaxValueAttribute, NSAccessibilityMinValueAttribute, |
| NSAccessibilityValueDescriptionAttribute |
| ]]; |
| } else if ([role isEqualToString:NSAccessibilityRowRole]) { |
| BrowserAccessibility* container = _owner->PlatformGetParent(); |
| if (container && container->GetRole() == ax::mojom::Role::kRowGroup) |
| container = container->PlatformGetParent(); |
| if ([subrole isEqualToString:NSAccessibilityOutlineRowSubrole] || |
| (container && container->GetRole() == ax::mojom::Role::kTreeGrid)) { |
| // clang-format off |
| [ret addObjectsFromArray:@[ |
| NSAccessibilityIndexAttribute, |
| NSAccessibilityDisclosedByRowAttribute, |
| NSAccessibilityDisclosedRowsAttribute, |
| NSAccessibilityDisclosingAttribute, |
| NSAccessibilityDisclosureLevelAttribute |
| ]]; |
| // clang-format on |
| } else { |
| [ret addObject:NSAccessibilityIndexAttribute]; |
| } |
| } else if ([self internalRole] == ax::mojom::Role::kHeading) { |
| // Heading level is exposed in both AXDisclosureLevel and AXValue. |
| // Safari also exposes the level in both. |
| [ret addObject:NSAccessibilityDisclosureLevelAttribute]; |
| } else if ([role isEqualToString:NSAccessibilityListRole]) { |
| [ret addObjectsFromArray:@[ |
| NSAccessibilitySelectedChildrenAttribute, |
| NSAccessibilityVisibleChildrenAttribute |
| ]]; |
| } else if ([role isEqualToString:NSAccessibilityOutlineRole]) { |
| [ret addObjectsFromArray:@[ |
| NSAccessibilityRowsAttribute, NSAccessibilityColumnsAttribute, |
| NSAccessibilityOrientationAttribute |
| ]]; |
| } |
| |
| if (_owner->IsTextField()) { |
| [ret addObjectsFromArray:@[ |
| NSAccessibilityInsertionPointLineNumberAttribute, |
| NSAccessibilityNumberOfCharactersAttribute, |
| NSAccessibilityPlaceholderValueAttribute, |
| NSAccessibilitySelectedTextAttribute, |
| NSAccessibilitySelectedTextRangeAttribute, |
| NSAccessibilityVisibleCharacterRangeAttribute, |
| NSAccessibilityValueAutofillAvailableAttribute, |
| // Not currently supported by Chrome: |
| // NSAccessibilityValueAutofilledAttribute, |
| // Not currently supported by Chrome: |
| // NSAccessibilityValueAutofillTypeAttribute |
| ]]; |
| } |
| |
| if (GetState(_owner, ax::mojom::State::kExpanded) || |
| GetState(_owner, ax::mojom::State::kCollapsed)) { |
| [ret addObject:NSAccessibilityExpandedAttribute]; |
| } |
| |
| if (GetState(_owner, ax::mojom::State::kVertical) || |
| GetState(_owner, ax::mojom::State::kHorizontal)) { |
| [ret addObject:NSAccessibilityOrientationAttribute]; |
| } |
| |
| // TODO(accessibility) What nodes should language be exposed on given new |
| // auto detection features? |
| // |
| // Once lang attribute inheritance becomes stable most nodes will have a |
| // language, so it may make more sense to always expose this attribute. |
| // |
| // For now we expose the language attribute if we have any language set. |
| if (_owner->node() && !_owner->node()->GetLanguage().empty()) |
| [ret addObject:NSAccessibilityLanguageAttribute]; |
| |
| // TODO(aboxhall): expose NSAccessibilityServesAsTitleForUIElementsAttribute |
| // for elements which are referred to by labelledby or are labels |
| |
| NSArray* super_ret = [super accessibilityAttributeNames]; |
| [ret addObjectsFromArray:super_ret]; |
| return ret; |
| } |
| |
| // Returns the index of the child in this objects array of children. |
| - (NSUInteger)accessibilityGetIndexOf:(id)child { |
| TRACE_EVENT1("accessibility", |
| "BrowserAccessibilityCocoa::accessibilityGetIndexOf", |
| "role=", ui::ToString([self internalRole])); |
| if (![self instanceActive]) |
| return 0; |
| |
| NSUInteger index = 0; |
| for (AXPlatformNodeCocoa* childToCheck in [self accessibilityChildren]) { |
| if ([child isEqual:childToCheck]) |
| return index; |
| ++index; |
| } |
| return NSNotFound; |
| } |
| |
| // Returns whether or not the specified attribute can be set by the |
| // accessibility API via |accessibilitySetValue:forAttribute:|. |
| - (BOOL)accessibilityIsAttributeSettable:(NSString*)attribute { |
| TRACE_EVENT2("accessibility", |
| "BrowserAccessibilityCocoa::accessibilityIsAttributeSettable", |
| "role=", ui::ToString([self internalRole]), |
| "attribute=", base::SysNSStringToUTF8(attribute)); |
| if (![self instanceActive]) |
| return NO; |
| |
| if ([attribute isEqualToString:NSAccessibilityFocusedAttribute]) { |
| if ([self internalRole] == ax::mojom::Role::kDateTime) |
| return NO; |
| |
| return _owner->IsFocusable(); |
| } |
| |
| if ([attribute isEqualToString:NSAccessibilityValueAttribute]) |
| return _owner->HasAction(ax::mojom::Action::kSetValue); |
| |
| if ([attribute isEqualToString:NSAccessibilitySelectedTextRangeAttribute] && |
| _owner->HasState(ax::mojom::State::kEditable)) { |
| return YES; |
| } |
| |
| if ([attribute |
| isEqualToString:NSAccessibilitySelectedTextMarkerRangeAttribute]) |
| return YES; |
| |
| return NO; |
| } |
| |
| - (BOOL)isAccessibilityEnabled { |
| if (![self instanceActive]) |
| return NO; |
| |
| return _owner->GetData().GetRestriction() != |
| ax::mojom::Restriction::kDisabled; |
| } |
| |
| - (NSRect)accessibilityFrame { |
| if (![self instanceActive]) |
| return NSZeroRect; |
| |
| BrowserAccessibilityManager* manager = _owner->manager(); |
| auto rect = _owner->GetBoundsRect(ui::AXCoordinateSystem::kScreenDIPs, |
| ui::AXClippingBehavior::kClipped); |
| |
| // TODO(vmpstr): GetBoundsRect() call above should account for this instead. |
| auto result_rect = |
| ScaleToRoundedRect(rect, 1.f / manager->device_scale_factor()); |
| |
| return gfx::ScreenRectToNSRect(result_rect); |
| } |
| |
| - (BOOL)isCheckable { |
| if (![self instanceActive]) |
| return NO; |
| |
| return _owner->GetData().HasCheckedState() || |
| _owner->GetRole() == ax::mojom::Role::kTab; |
| } |
| |
| // Performs the given accessibility action on the webkit accessibility object |
| // that backs this object. |
| - (void)accessibilityPerformAction:(NSString*)action { |
| TRACE_EVENT2("accessibility", |
| "BrowserAccessibilityCocoa::accessibilityPerformAction", |
| "role=", ui::ToString([self internalRole]), |
| "action=", base::SysNSStringToUTF8(action)); |
| if (![self instanceActive]) |
| return; |
| |
| // TODO(dmazzoni): Support more actions. |
| BrowserAccessibility* actionTarget = [self actionTarget]; |
| BrowserAccessibilityManager* manager = actionTarget->manager(); |
| if ([action isEqualToString:NSAccessibilityPressAction]) { |
| manager->DoDefaultAction(*actionTarget); |
| if (actionTarget->GetData().GetRestriction() != |
| ax::mojom::Restriction::kNone || |
| ![self isCheckable]) |
| return; |
| // Hack: preemptively set the checked state to what it should become, |
| // otherwise VoiceOver will very likely report the old, incorrect state to |
| // the user as it requests the value too quickly. |
| ui::AXNode* node = actionTarget->node(); |
| if (!node) |
| return; |
| AXNodeData data(node->TakeData()); // Temporarily take data. |
| if (data.role == ax::mojom::Role::kRadioButton) { |
| data.SetCheckedState(ax::mojom::CheckedState::kTrue); |
| } else if (data.role == ax::mojom::Role::kCheckBox || |
| data.role == ax::mojom::Role::kSwitch || |
| data.role == ax::mojom::Role::kToggleButton) { |
| ax::mojom::CheckedState checkedState = data.GetCheckedState(); |
| ax::mojom::CheckedState newCheckedState = |
| checkedState == ax::mojom::CheckedState::kFalse |
| ? ax::mojom::CheckedState::kTrue |
| : ax::mojom::CheckedState::kFalse; |
| data.SetCheckedState(newCheckedState); |
| } |
| node->SetData(data); // Set the data back in the node. |
| } else if ([action isEqualToString:NSAccessibilityShowMenuAction]) { |
| manager->ShowContextMenu(*actionTarget); |
| } else if ([action isEqualToString:NSAccessibilityScrollToVisibleAction]) { |
| manager->ScrollToMakeVisible(*actionTarget, gfx::Rect()); |
| } else if ([action isEqualToString:NSAccessibilityIncrementAction]) { |
| manager->Increment(*actionTarget); |
| } else if ([action isEqualToString:NSAccessibilityDecrementAction]) { |
| manager->Decrement(*actionTarget); |
| } |
| } |
| |
| // Returns the description of the given action. |
| - (NSString*)accessibilityActionDescription:(NSString*)action { |
| TRACE_EVENT2("accessibility", |
| "BrowserAccessibilityCocoa::accessibilityActionDescription", |
| "role=", ui::ToString([self internalRole]), |
| "action=", base::SysNSStringToUTF8(action)); |
| if (![self instanceActive]) |
| return nil; |
| |
| return NSAccessibilityActionDescription(action); |
| } |
| |
| // Sets an override value for a specific accessibility attribute. |
| // This class does not support this. |
| - (BOOL)accessibilitySetOverrideValue:(id)value |
| forAttribute:(NSString*)attribute { |
| TRACE_EVENT2( |
| "accessibility", |
| "BrowserAccessibilityCocoa::accessibilitySetOverrideValue:forAttribute", |
| "role=", ui::ToString([self internalRole]), |
| "attribute=", base::SysNSStringToUTF8(attribute)); |
| if (![self instanceActive]) |
| return NO; |
| return NO; |
| } |
| |
| // Sets the value for an accessibility attribute via the accessibility API. |
| - (void)accessibilitySetValue:(id)value forAttribute:(NSString*)attribute { |
| TRACE_EVENT2("accessibility", |
| "BrowserAccessibilityCocoa::accessibilitySetValue:forAttribute", |
| "role=", ui::ToString([self internalRole]), |
| "attribute=", base::SysNSStringToUTF8(attribute)); |
| if (![self instanceActive]) |
| return; |
| |
| if ([attribute isEqualToString:NSAccessibilityFocusedAttribute]) { |
| NSNumber* focusedNumber = value; |
| BrowserAccessibilityManager* manager = _owner->manager(); |
| BOOL focused = [focusedNumber intValue]; |
| if (focused) |
| manager->SetFocus(*_owner); |
| } |
| if ([attribute isEqualToString:NSAccessibilitySelectedTextRangeAttribute]) { |
| if (content::IsNSRange(value)) { |
| [self setAccessibilitySelectedTextRange:[(NSValue*)value rangeValue]]; |
| } |
| } |
| if ([attribute |
| isEqualToString:NSAccessibilitySelectedTextMarkerRangeAttribute] && |
| // Condition also on when this node is editable. VoiceOver as of Mac 13 |
| // sets selections as users navigate on read only content. This has |
| // adverse side effects on VoiceOver's a11y focus causing loops in |
| // navigation. |
| _owner->HasState(ax::mojom::State::kEditable)) { |
| AXRange range = AXTextMarkerRangeToAXRange(value); |
| if (range.IsNull()) |
| return; |
| BrowserAccessibilityManager* manager = _owner->manager(); |
| manager->SetSelection(AXRange(range.anchor()->AsDomSelectionPosition(), |
| range.focus()->AsDomSelectionPosition())); |
| } |
| } |
| |
| - (id)accessibilityFocusedUIElement { |
| TRACE_EVENT1("accessibility", |
| "BrowserAccessibilityCocoa::accessibilityFocusedUIElement", |
| "role=", ui::ToString([self internalRole])); |
| if (![self instanceActive]) |
| return nil; |
| |
| ui::AXPlatformNodeDelegate* focus_node = _owner->manager()->GetFocus(); |
| return focus_node ? focus_node->GetNativeViewAccessible() : nullptr; |
| } |
| |
| // Returns the deepest accessibility child that should not be ignored. |
| // It is assumed that the hit test has been narrowed down to this object |
| // or one of its children, so this will never return nil unless this |
| // object is invalid. |
| - (id)accessibilityHitTest:(NSPoint)point { |
| TRACE_EVENT2("accessibility", |
| "BrowserAccessibilityCocoa::accessibilityHitTest", |
| "role=", ui::ToString([self internalRole]), |
| "point=", base::SysNSStringToUTF8(NSStringFromPoint(point))); |
| if (![self instanceActive]) |
| return nil; |
| |
| // The point we receive is in frame coordinates. |
| // Convert to screen coordinates and then to physical pixel coordinates. |
| BrowserAccessibilityManager* manager = _owner->manager(); |
| gfx::Point screen_point_in_dips(point.x, point.y); |
| |
| auto offset_in_blink_space = |
| manager->GetViewBoundsInScreenCoordinates().OffsetFromOrigin(); |
| |
| // Blink space is physical, so we scale the |
| // point first then add the offset. Otherwise, it's in DIPs so we add the |
| // offset first and then scale. |
| // TODO(vmpstr): GetViewBoundsInScreenCoordinates should return consistent |
| // space. |
| gfx::Point screen_point_in_physical_space; |
| screen_point_in_physical_space = |
| ScaleToRoundedPoint(screen_point_in_dips, manager->device_scale_factor()); |
| screen_point_in_physical_space += offset_in_blink_space; |
| |
| BrowserAccessibility* hit = |
| manager->CachingAsyncHitTest(screen_point_in_physical_space); |
| if (!hit) |
| return nil; |
| |
| return NSAccessibilityUnignoredAncestor(hit->GetNativeViewAccessible()); |
| } |
| |
| - (BOOL)isEqual:(id)object { |
| if (![object isKindOfClass:[BrowserAccessibilityCocoa class]]) |
| return NO; |
| return ([self hash] == [object hash]); |
| } |
| |
| - (NSUInteger)hash { |
| // Potentially called during dealloc. |
| if (![self instanceActive]) |
| return [super hash]; |
| return _owner->GetId(); |
| } |
| |
| - (BOOL)accessibilityNotifiesWhenDestroyed { |
| TRACE_EVENT0("accessibility", |
| "BrowserAccessibilityCocoa::accessibilityNotifiesWhenDestroyed"); |
| // Indicate that BrowserAccessibilityCocoa will post a notification when it's |
| // destroyed (see -detach). This allows VoiceOver to do some internal things |
| // more efficiently. |
| return YES; |
| } |
| |
| // Choose the appropriate accessibility object to receive an action depending |
| // on the characteristics of this accessibility node. |
| - (BrowserAccessibility*)actionTarget { |
| // When an action is triggered on a container with selectable children and |
| // one of those children is an active descendant or focused, retarget the |
| // action to that child. See https://crbug.com/1114892. |
| if (!ui::IsContainerWithSelectableChildren(_owner->GetRole())) |
| return _owner; |
| |
| // Active descendant takes priority over focus, because the webpage author has |
| // explicitly designated a different behavior for users of assistive software. |
| BrowserAccessibility* activeDescendant = |
| _owner->manager()->GetActiveDescendant(_owner); |
| if (activeDescendant != _owner) |
| return activeDescendant; |
| |
| BrowserAccessibility* focus = _owner->manager()->GetFocus(); |
| if (focus && focus->IsDescendantOf(_owner)) |
| return focus; |
| |
| return _owner; |
| } |
| |
| - (BOOL)isAccessibilityElement { |
| if (![self instanceActive]) |
| return NO; |
| |
| if ([self internalRole] == ax::mojom::Role::kImage && |
| _owner->HasExplicitlyEmptyName()) { |
| return NO; |
| } |
| |
| return [super isAccessibilityElement]; |
| } |
| |
| @end |