From 43a97878ce14b72f0981164f87f2e35e14151312 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 11:22:09 +0200 Subject: Adding upstream version 110.0.1. Signed-off-by: Daniel Baumann --- accessible/mac/mozSelectableElements.mm | 336 ++++++++++++++++++++++++++++++++ 1 file changed, 336 insertions(+) create mode 100644 accessible/mac/mozSelectableElements.mm (limited to 'accessible/mac/mozSelectableElements.mm') diff --git a/accessible/mac/mozSelectableElements.mm b/accessible/mac/mozSelectableElements.mm new file mode 100644 index 0000000000..693514e405 --- /dev/null +++ b/accessible/mac/mozSelectableElements.mm @@ -0,0 +1,336 @@ +/* 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 "mozSelectableElements.h" +#import "MOXWebAreaAccessible.h" +#import "MacUtils.h" +#include "LocalAccessible-inl.h" +#include "nsCocoaUtils.h" + +using namespace mozilla::a11y; + +@implementation mozSelectableAccessible + +/** + * Return the mozAccessibles that are selectable. + */ +- (NSArray*)selectableChildren { + NSArray* toFilter; + if ([self isKindOfClass:[mozMenuAccessible class]]) { + // If we are a menu, our children are only selectable if they are visible + // so we filter this array instead of our unignored children list, which may + // contain invisible items. + toFilter = [static_cast(self) moxVisibleChildren]; + } else { + toFilter = [self moxUnignoredChildren]; + } + return [toFilter + filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL( + mozAccessible* child, + NSDictionary* bindings) { + return [child isKindOfClass:[mozSelectableChildAccessible class]]; + }]]; +} + +- (void)moxSetSelectedChildren:(NSArray*)selectedChildren { + for (id child in [self selectableChildren]) { + BOOL selected = + [selectedChildren indexOfObjectIdenticalTo:child] != NSNotFound; + [child moxSetSelected:@(selected)]; + } +} + +/** + * Return the mozAccessibles that are actually selected. + */ +- (NSArray*)moxSelectedChildren { + return [[self selectableChildren] + filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL( + mozAccessible* child, + NSDictionary* bindings) { + // Return mozSelectableChildAccessibles that have are selected (truthy + // value). + return [[(mozSelectableChildAccessible*)child moxSelected] boolValue]; + }]]; +} + +@end + +@implementation mozSelectableChildAccessible + +- (NSNumber*)moxSelected { + return @([self stateWithMask:states::SELECTED] != 0); +} + +- (void)moxSetSelected:(NSNumber*)selected { + // Get SELECTABLE and UNAVAILABLE state. + uint64_t state = + [self stateWithMask:(states::SELECTABLE | states::UNAVAILABLE)]; + if ((state & states::SELECTABLE) == 0 || (state & states::UNAVAILABLE) != 0) { + // The object is either not selectable or is unavailable. Don't do anything. + return; + } + + mGeckoAccessible->SetSelected([selected boolValue]); + + // We need to invalidate the state because the accessibility service + // may check the selected attribute synchornously and not wait for + // selection events. + [self invalidateState]; +} + +@end + +@implementation mozTabGroupAccessible + +- (NSArray*)moxTabs { + return [self selectableChildren]; +} + +- (NSArray*)moxContents { + return [self moxUnignoredChildren]; +} + +- (id)moxValue { + // The value of a tab group is its selected child. In the case + // of multiple selections this will return the first one. + return [[self moxSelectedChildren] firstObject]; +} + +@end + +@implementation mozTabAccessible + +- (NSString*)moxRoleDescription { + return utils::LocalizedString(u"tab"_ns); +} + +- (id)moxValue { + // Retuens 1 if item is selected, 0 if not. + return [self moxSelected]; +} + +@end + +@implementation mozListboxAccessible + +- (BOOL)moxIgnoreChild:(mozAccessible*)child { + if (!child || child->mRole == roles::GROUPING) { + return YES; + } + + return [super moxIgnoreChild:child]; +} + +- (BOOL)disableChild:(mozAccessible*)child { + return ![child isKindOfClass:[mozSelectableChildAccessible class]]; +} + +- (NSString*)moxOrientation { + return NSAccessibilityUnknownOrientationValue; +} + +@end + +@implementation mozOptionAccessible + +- (NSString*)moxTitle { + return @""; +} + +- (id)moxValue { + // Swap title and value of option so it behaves more like a AXStaticText. + return [super moxTitle]; +} + +@end + +@implementation mozMenuAccessible + +- (NSString*)moxTitle { + return @""; +} + +- (NSString*)moxLabel { + return @""; +} + +- (BOOL)moxIgnoreWithParent:(mozAccessible*)parent { + // This helps us generate the correct moxChildren array for + // a sub menu -- that returned array should contain all + // menu items, regardless of if they are visible or not. + // Because moxChildren does ignore filtering, and because + // our base ignore method filters out invisible accessibles, + // we override this method. + if ([parent isKindOfClass:[MOXWebAreaAccessible class]] || + [parent isKindOfClass:[MOXRootGroup class]]) { + // We are a top level menu. Check our visibility the normal way + return [super moxIgnoreWithParent:parent]; + } + + if ([parent isKindOfClass:[mozMenuItemAccessible class]] && + [parent geckoAccessible]->Role() == roles::PARENT_MENUITEM) { + // We are a submenu. If our parent menu item is in an open menu + // we should not be ignored + id grandparent = [parent moxParent]; + if ([grandparent isKindOfClass:[mozMenuAccessible class]]) { + mozMenuAccessible* parentMenu = + static_cast(grandparent); + return ![parentMenu isOpened]; + } + } + + // Otherwise, we call into our superclass's ignore method + // to handle menus that are not submenus + return [super moxIgnoreWithParent:parent]; +} + +- (NSArray*)moxVisibleChildren { + // VO expects us to expose two lists of children on menus: all children + // (done in moxUnignoredChildren), and children which are visible (here). + // We implement ignoreWithParent for both menus and menu items + // to ensure moxUnignoredChildren returns a complete list of children + // regardless of visibility, see comments in those methods for additional + // info. + return [[self moxChildren] + filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL( + mozAccessible* child, + NSDictionary* bindings) { + if (LocalAccessible* acc = [child geckoAccessible]->AsLocal()) { + if (acc->IsContent() && acc->GetContent()->IsXULElement()) { + return ((acc->VisibilityState() & states::INVISIBLE) == 0); + } + } + return true; + }]]; +} + +- (id)moxTitleUIElement { + id parent = [self moxUnignoredParent]; + if (parent && [parent isKindOfClass:[mozAccessible class]]) { + return parent; + } + + return nil; +} + +- (void)moxPostNotification:(NSString*)notification { + if ([notification isEqualToString:@"AXMenuOpened"]) { + mIsOpened = YES; + } else if ([notification isEqualToString:@"AXMenuClosed"]) { + mIsOpened = NO; + } + + [super moxPostNotification:notification]; +} + +- (void)expire { + if (mIsOpened) { + // VO needs to receive a menu closed event when the menu goes away. + // If the menu is being destroyed, send a menu closed event first. + [self moxPostNotification:@"AXMenuClosed"]; + } + + [super expire]; +} + +- (BOOL)isOpened { + return mIsOpened; +} + +@end + +@implementation mozMenuItemAccessible + +- (NSString*)moxLabel { + return @""; +} + +- (BOOL)moxIgnoreWithParent:(mozAccessible*)parent { + // This helps us generate the correct moxChildren array for + // a mozMenuAccessible; the returned array should contain all + // menu items, regardless of if they are visible or not. + // Because moxChildren does ignore filtering, and because + // our base ignore method filters out invisible accessibles, + // we override this method. + Accessible* parentAcc = [parent geckoAccessible]; + if (parentAcc) { + Accessible* grandparentAcc = parentAcc->Parent(); + if (mozAccessible* directGrandparent = + GetNativeFromGeckoAccessible(grandparentAcc)) { + if ([directGrandparent isKindOfClass:[MOXWebAreaAccessible class]]) { + return [parent moxIgnoreWithParent:directGrandparent]; + } + } + } + + id grandparent = [parent moxParent]; + if ([grandparent isKindOfClass:[mozMenuItemAccessible class]]) { + mozMenuItemAccessible* acc = + static_cast(grandparent); + if ([acc geckoAccessible]->Role() == roles::PARENT_MENUITEM) { + mozMenuAccessible* parentMenu = static_cast(parent); + // if we are a menu item in a submenu, display only when + // parent menu item is open + return ![parentMenu isOpened]; + } + } + + // Otherwise, we call into our superclass's method to handle + // menuitems that are not within submenus + return [super moxIgnoreWithParent:parent]; +} + +- (NSString*)moxMenuItemMarkChar { + LocalAccessible* acc = mGeckoAccessible->AsLocal(); + if (acc && acc->IsContent() && + acc->GetContent()->IsXULElement(nsGkAtoms::menuitem)) { + // We need to provide a marker character. This is the visible "√" you see + // on dropdown menus. In our a11y tree this is a single child text node + // of the menu item. + // We do this only with XUL menuitems that conform to the native theme, and + // not with aria menu items that might have a pseudo element or something. + if (acc->ChildCount() == 1 && + acc->LocalFirstChild()->Role() == roles::STATICTEXT) { + nsAutoString marker; + acc->LocalFirstChild()->Name(marker); + if (marker.Length() == 1) { + return nsCocoaUtils::ToNSString(marker); + } + } + } + + return nil; +} + +- (NSNumber*)moxSelected { + // Our focused state is equivelent to native selected states for menus. + return @([self stateWithMask:states::FOCUSED] != 0); +} + +- (void)handleAccessibleEvent:(uint32_t)eventType { + switch (eventType) { + case nsIAccessibleEvent::EVENT_FOCUS: + [self invalidateState]; + // Our focused state is equivelent to native selected states for menus. + mozAccessible* parent = (mozAccessible*)[self moxUnignoredParent]; + [parent moxPostNotification: + NSAccessibilitySelectedChildrenChangedNotification]; + break; + } + + [super handleAccessibleEvent:eventType]; +} + +- (void)moxPerformPress { + [super moxPerformPress]; + // when a menu item is pressed (chosen), we need to tell + // VoiceOver about it, so we send this notification + [self moxPostNotification:@"AXMenuItemSelected"]; +} + +@end -- cgit v1.2.3