Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 553 insertions, 0 deletions

diff --git a/accessible/mac/MOXAccessibleBase.mm b/accessible/mac/MOXAccessibleBase.mm
new file mode 100644
index 0000000000..0e671659a2
--- /dev/null
+++ b/accessible/mac/MOXAccessibleBase.mm
@@ -0,0 +1,553 @@
+/* clang-format off */
+/* -*- Mode: Objective-C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* clang-format on */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#import "MOXAccessibleBase.h"
+
+#import "MacSelectorMap.h"
+
+#include "nsObjCExceptions.h"
+#include "xpcAccessibleMacInterface.h"
+#include "mozilla/Logging.h"
+
+using namespace mozilla::a11y;
+
+#undef LOG
+mozilla::LogModule* GetMacAccessibilityLog() {
+  static mozilla::LazyLogModule sLog("MacAccessibility");
+
+  return sLog;
+}
+#define LOG(type, format, ...)                                             \
+  do {                                                                     \
+    if (MOZ_LOG_TEST(GetMacAccessibilityLog(), type)) {                    \
+      NSString* msg = [NSString stringWithFormat:(format), ##__VA_ARGS__]; \
+      MOZ_LOG(GetMacAccessibilityLog(), type, ("%s", [msg UTF8String]));   \
+    }                                                                      \
+  } while (0)
+
+@interface NSObject (MOXAccessible)
+
+// This NSObject conforms to MOXAccessible.
+// This is needed to we know to mutate the value
+// (get represented view, check isAccessibilityElement)
+// before forwarding it to NSAccessibility.
+- (BOOL)isMOXAccessible;
+
+// Same as above, but this checks if the NSObject is an array with
+// mozAccessible conforming objects.
+- (BOOL)hasMOXAccessibles;
+
+@end
+
+@implementation NSObject (MOXAccessible)
+
+- (BOOL)isMOXAccessible {
+  return [self conformsToProtocol:@protocol(MOXAccessible)];
+}
+
+- (BOOL)hasMOXAccessibles {
+  return [self isKindOfClass:[NSArray class]] &&
+         [[(NSArray*)self firstObject] isMOXAccessible];
+}
+
+@end
+
+// Private methods
+@interface MOXAccessibleBase ()
+
+- (BOOL)isSelectorSupported:(SEL)selector;
+
+@end
+
+@implementation MOXAccessibleBase
+
+#pragma mark - mozAccessible/widget
+
+- (BOOL)hasRepresentedView {
+  return NO;
+}
+
+- (id)representedView {
+  return nil;
+}
+
+- (BOOL)isRoot {
+  return NO;
+}
+
+#pragma mark - mozAccessible/NSAccessibility
+
+- (NSArray*)accessibilityAttributeNames {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
+
+  if ([self isExpired]) {
+    return nil;
+  }
+
+  static NSMutableDictionary* attributesForEachClass = nil;
+
+  if (!attributesForEachClass) {
+    attributesForEachClass = [[NSMutableDictionary alloc] init];
+  }
+
+  NSMutableArray* attributes =
+      attributesForEachClass [[self class]] ?: [[NSMutableArray alloc] init];
+
+  NSDictionary* getters = mac::AttributeGetters();
+  if (![attributes count]) {
+    // Go through all our attribute getters, if they are supported by this class
+    // advertise the attribute name.
+    for (NSString* attribute in getters) {
+      SEL selector = NSSelectorFromString(getters[attribute]);
+      if ([self isSelectorSupported:selector]) {
+        [attributes addObject:attribute];
+      }
+    }
+
+    // If we have a delegate add all the text marker attributes.
+    if ([self moxTextMarkerDelegate]) {
+      [attributes addObjectsFromArray:[mac::TextAttributeGetters() allKeys]];
+    }
+
+    // We store a hash table with types as keys, and atttribute lists as values.
+    // This lets us cache the atttribute list of each subclass so we only
+    // need to gather its MOXAccessible methods once.
+    // XXX: Uncomment when accessibilityAttributeNames is removed from all
+    // subclasses. attributesForEachClass[[self class]] = attributes;
+  }
+
+  return attributes;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
+}
+
+- (id)accessibilityAttributeValue:(NSString*)attribute {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
+  if ([self isExpired]) {
+    return nil;
+  }
+
+  id value = nil;
+  NSDictionary* getters = mac::AttributeGetters();
+  if (getters[attribute]) {
+    SEL selector = NSSelectorFromString(getters[attribute]);
+    if ([self isSelectorSupported:selector]) {
+      value = [self performSelector:selector];
+    }
+  } else if (id textMarkerDelegate = [self moxTextMarkerDelegate]) {
+    // If we have a delegate, check if attribute is a text marker
+    // attribute and call the associated selector on the delegate
+    // if so.
+    NSDictionary* textMarkerGetters = mac::TextAttributeGetters();
+    if (textMarkerGetters[attribute]) {
+      SEL selector = NSSelectorFromString(textMarkerGetters[attribute]);
+      if ([textMarkerDelegate respondsToSelector:selector]) {
+        value = [textMarkerDelegate performSelector:selector];
+      }
+    }
+  }
+
+  if ([value isMOXAccessible]) {
+    // If this is a MOXAccessible, get its represented view or filter it if
+    // it should be ignored.
+    value = [value isAccessibilityElement] ? GetObjectOrRepresentedView(value)
+                                           : nil;
+  }
+
+  if ([value hasMOXAccessibles]) {
+    // If this is an array of mozAccessibles, get each element's represented
+    // view and remove it from the returned array if it should be ignored.
+    NSUInteger arrSize = [value count];
+    NSMutableArray* arr = [[NSMutableArray alloc] initWithCapacity:arrSize];
+    for (NSUInteger i = 0; i < arrSize; i++) {
+      id<mozAccessible> mozAcc = GetObjectOrRepresentedView(value[i]);
+      if ([mozAcc isAccessibilityElement]) {
+        [arr addObject:mozAcc];
+      }
+    }
+
+    value = arr;
+  }
+
+  if (MOZ_LOG_TEST(GetMacAccessibilityLog(), LogLevel::Debug)) {
+    if (MOZ_LOG_TEST(GetMacAccessibilityLog(), LogLevel::Verbose)) {
+      LOG(LogLevel::Verbose, @"%@ attributeValue %@ => %@", self, attribute,
+          value);
+    } else if (![attribute isEqualToString:@"AXParent"] &&
+               ![attribute isEqualToString:@"AXRole"] &&
+               ![attribute isEqualToString:@"AXSubrole"] &&
+               ![attribute isEqualToString:@"AXSize"] &&
+               ![attribute isEqualToString:@"AXPosition"] &&
+               ![attribute isEqualToString:@"AXRole"] &&
+               ![attribute isEqualToString:@"AXChildren"]) {
+      LOG(LogLevel::Debug, @"%@ attributeValue %@", self, attribute);
+    }
+  }
+
+  return value;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
+}
+
+- (BOOL)accessibilityIsAttributeSettable:(NSString*)attribute {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
+
+  if ([self isExpired]) {
+    return NO;
+  }
+
+  NSDictionary* setters = mac::AttributeSetters();
+  if (setters[attribute]) {
+    SEL selector = NSSelectorFromString(setters[attribute]);
+    if ([self isSelectorSupported:selector]) {
+      return YES;
+    }
+  } else if (id textMarkerDelegate = [self moxTextMarkerDelegate]) {
+    // If we have a delegate, check text setters on delegate
+    NSDictionary* textMarkerSetters = mac::TextAttributeSetters();
+    if (textMarkerSetters[attribute]) {
+      SEL selector = NSSelectorFromString(textMarkerSetters[attribute]);
+      if ([textMarkerDelegate respondsToSelector:selector]) {
+        return YES;
+      }
+    }
+  }
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NO);
+}
+
+- (void)accessibilitySetValue:(id)value forAttribute:(NSString*)attribute {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
+
+  if ([self isExpired]) {
+    return;
+  }
+
+  LOG(LogLevel::Debug, @"%@ setValueForattribute %@ = %@", self, attribute,
+      value);
+
+  NSDictionary* setters = mac::AttributeSetters();
+  if (setters[attribute]) {
+    SEL selector = NSSelectorFromString(setters[attribute]);
+    if ([self isSelectorSupported:selector]) {
+      [self performSelector:selector withObject:value];
+    }
+  } else if (id textMarkerDelegate = [self moxTextMarkerDelegate]) {
+    // If we have a delegate, check if attribute is a text marker
+    // attribute and call the associated selector on the delegate
+    // if so.
+    NSDictionary* textMarkerSetters = mac::TextAttributeSetters();
+    if (textMarkerSetters[attribute]) {
+      SEL selector = NSSelectorFromString(textMarkerSetters[attribute]);
+      if ([textMarkerDelegate respondsToSelector:selector]) {
+        [textMarkerDelegate performSelector:selector withObject:value];
+      }
+    }
+  }
+
+  NS_OBJC_END_TRY_ABORT_BLOCK;
+}
+
+- (NSArray*)accessibilityActionNames {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
+
+  if ([self isExpired]) {
+    return nil;
+  }
+
+  NSMutableArray* actionNames = [[NSMutableArray alloc] init];
+
+  NSDictionary* actions = mac::Actions();
+  for (NSString* action in actions) {
+    SEL selector = NSSelectorFromString(actions[action]);
+    if ([self isSelectorSupported:selector]) {
+      [actionNames addObject:action];
+    }
+  }
+
+  return actionNames;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
+}
+
+- (void)accessibilityPerformAction:(NSString*)action {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
+
+  if ([self isExpired]) {
+    return;
+  }
+
+  LOG(LogLevel::Debug, @"%@ performAction %@ ", self, action);
+
+  NSDictionary* actions = mac::Actions();
+  if (actions[action]) {
+    SEL selector = NSSelectorFromString(actions[action]);
+    if ([self isSelectorSupported:selector]) {
+      [self performSelector:selector];
+    }
+  }
+
+  NS_OBJC_END_TRY_ABORT_BLOCK;
+}
+
+- (NSString*)accessibilityActionDescription:(NSString*)action {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
+  // by default we return whatever the MacOS API know about.
+  // if you have custom actions, override.
+  return NSAccessibilityActionDescription(action);
+  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
+}
+
+- (NSArray*)accessibilityParameterizedAttributeNames {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
+
+  if ([self isExpired]) {
+    return nil;
+  }
+
+  NSMutableArray* attributeNames = [[NSMutableArray alloc] init];
+
+  NSDictionary* attributes = mac::ParameterizedAttributeGetters();
+  for (NSString* attribute in attributes) {
+    SEL selector = NSSelectorFromString(attributes[attribute]);
+    if ([self isSelectorSupported:selector]) {
+      [attributeNames addObject:attribute];
+    }
+  }
+
+  // If we have a delegate add all the text marker attributes.
+  if ([self moxTextMarkerDelegate]) {
+    [attributeNames
+        addObjectsFromArray:[mac::ParameterizedTextAttributeGetters() allKeys]];
+  }
+
+  return attributeNames;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
+}
+
+- (id)accessibilityAttributeValue:(NSString*)attribute
+                     forParameter:(id)parameter {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
+
+  if ([self isExpired]) {
+    return nil;
+  }
+
+  id value = nil;
+
+  NSDictionary* getters = mac::ParameterizedAttributeGetters();
+  if (getters[attribute]) {
+    SEL selector = NSSelectorFromString(getters[attribute]);
+    if ([self isSelectorSupported:selector]) {
+      value = [self performSelector:selector withObject:parameter];
+    }
+  } else if (id textMarkerDelegate = [self moxTextMarkerDelegate]) {
+    // If we have a delegate, check if attribute is a text marker
+    // attribute and call the associated selector on the delegate
+    // if so.
+    NSDictionary* textMarkerGetters = mac::ParameterizedTextAttributeGetters();
+    if (textMarkerGetters[attribute]) {
+      SEL selector = NSSelectorFromString(textMarkerGetters[attribute]);
+      if ([textMarkerDelegate respondsToSelector:selector]) {
+        value = [textMarkerDelegate performSelector:selector
+                                         withObject:parameter];
+      }
+    }
+  }
+
+  if (MOZ_LOG_TEST(GetMacAccessibilityLog(), LogLevel::Verbose)) {
+    LOG(LogLevel::Verbose, @"%@ attributeValueForParam %@(%@) => %@", self,
+        attribute, parameter, value);
+  } else {
+    LOG(LogLevel::Debug, @"%@ attributeValueForParam %@", self, attribute);
+  }
+
+  return value;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
+}
+
+- (id)accessibilityHitTest:(NSPoint)point {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
+  return [self moxHitTest:point];
+  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
+}
+
+- (id)accessibilityFocusedUIElement {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
+  return [self moxFocusedUIElement];
+  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
+}
+
+- (BOOL)isAccessibilityElement {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
+
+  if ([self isExpired]) {
+    return YES;
+  }
+
+  id parent = [self moxParent];
+  if (![parent isMOXAccessible]) {
+    return YES;
+  }
+
+  return ![self moxIgnoreWithParent:parent];
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NO);
+}
+
+- (BOOL)accessibilityNotifiesWhenDestroyed {
+  return YES;
+}
+
+#pragma mark - MOXAccessible protocol
+
+- (NSNumber*)moxIndexForChildUIElement:(id)child {
+  return @([[self moxUnignoredChildren] indexOfObject:child]);
+}
+
+- (id)moxTopLevelUIElement {
+  return [self moxWindow];
+}
+
+- (id)moxHitTest:(NSPoint)point {
+  return GetObjectOrRepresentedView(self);
+}
+
+- (id)moxFocusedUIElement {
+  return GetObjectOrRepresentedView(self);
+}
+
+- (void)moxPostNotification:(NSString*)notification {
+  [self moxPostNotification:notification withUserInfo:nil];
+}
+
+- (void)moxPostNotification:(NSString*)notification
+               withUserInfo:(NSDictionary*)userInfo {
+  if (MOZ_LOG_TEST(GetMacAccessibilityLog(), LogLevel::Verbose)) {
+    LOG(LogLevel::Verbose, @"%@ notify %@ %@", self, notification, userInfo);
+  } else {
+    LOG(LogLevel::Debug, @"%@ notify %@", self, notification);
+  }
+
+  // This sends events via nsIObserverService to be consumed by our mochitests.
+  xpcAccessibleMacEvent::FireEvent(self, notification, userInfo);
+
+  if (gfxPlatform::IsHeadless()) {
+    // Using a headless toolkit for tests and whatnot, posting accessibility
+    // notification won't work.
+    return;
+  }
+
+  if (![self isAccessibilityElement]) {
+    // If this is an ignored object, don't expose it to system.
+    return;
+  }
+
+  if (userInfo) {
+    NSAccessibilityPostNotificationWithUserInfo(
+        GetObjectOrRepresentedView(self), notification, userInfo);
+  } else {
+    NSAccessibilityPostNotification(GetObjectOrRepresentedView(self),
+                                    notification);
+  }
+}
+
+- (BOOL)moxBlockSelector:(SEL)selector {
+  return NO;
+}
+
+- (NSArray*)moxChildren {
+  return @[];
+}
+
+- (NSArray*)moxUnignoredChildren {
+  NSMutableArray* unignoredChildren = [[NSMutableArray alloc] init];
+  NSArray* allChildren = [self moxChildren];
+
+  for (MOXAccessibleBase* nativeChild in allChildren) {
+    if ([nativeChild moxIgnoreWithParent:self]) {
+      // If this child should be ignored get its unignored children.
+      // This will in turn recurse to any unignored descendants if the
+      // child is ignored.
+      [unignoredChildren
+          addObjectsFromArray:[nativeChild moxUnignoredChildren]];
+    } else {
+      [unignoredChildren addObject:nativeChild];
+    }
+  }
+
+  return unignoredChildren;
+}
+
+- (id<mozAccessible>)moxParent {
+  return nil;
+}
+
+- (id<mozAccessible>)moxUnignoredParent {
+  id nativeParent = [self moxParent];
+
+  if (![nativeParent isAccessibilityElement]) {
+    return [nativeParent moxUnignoredParent];
+  }
+
+  return GetObjectOrRepresentedView(nativeParent);
+}
+
+- (BOOL)moxIgnoreWithParent:(MOXAccessibleBase*)parent {
+  return [parent moxIgnoreChild:self];
+}
+
+- (BOOL)moxIgnoreChild:(MOXAccessibleBase*)child {
+  return NO;
+}
+
+- (id<MOXTextMarkerSupport>)moxTextMarkerDelegate {
+  return nil;
+}
+
+- (BOOL)moxIsLiveRegion {
+  return NO;
+}
+
+#pragma mark -
+
+// objc-style description (from NSObject); not to be confused with the
+// accessible description above.
+- (NSString*)description {
+  if (MOZ_LOG_TEST(GetMacAccessibilityLog(), LogLevel::Debug)) {
+    if ([self isSelectorSupported:@selector(moxMozDebugDescription)]) {
+      return [self moxMozDebugDescription];
+    }
+  }
+
+  return [NSString stringWithFormat:@"<%@: %p %@>",
+                                    NSStringFromClass([self class]), self,
+                                    [self moxRole]];
+}
+
+- (BOOL)isExpired {
+  return mIsExpired;
+}
+
+- (void)expire {
+  MOZ_ASSERT(!mIsExpired, "expire called an expired mozAccessible!");
+
+  mIsExpired = YES;
+
+  [self moxPostNotification:NSAccessibilityUIElementDestroyedNotification];
+}
+
+#pragma mark - Private
+
+- (BOOL)isSelectorSupported:(SEL)selector {
+  return
+      [self respondsToSelector:selector] && ![self moxBlockSelector:selector];
+}
+
+@end