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/* 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 <Cocoa/Cocoa.h>
#import "MOXTextMarkerDelegate.h"
#include "Platform.h"
#include "ProxyAccessible.h"
#include "AccessibleOrProxy.h"
#include "DocAccessibleParent.h"
#include "mozTableAccessible.h"
#include "MOXWebAreaAccessible.h"
#include "nsAppShell.h"
#include "mozilla/Telemetry.h"
// Available from 10.13 onwards; test availability at runtime before using
@interface NSWorkspace (AvailableSinceHighSierra)
@property(readonly) BOOL isVoiceOverEnabled;
@end
namespace mozilla {
namespace a11y {
// Mac a11y whitelisting
static bool sA11yShouldBeEnabled = false;
bool ShouldA11yBeEnabled() {
EPlatformDisabledState disabledState = PlatformDisabledState();
return (disabledState == ePlatformIsForceEnabled) ||
((disabledState == ePlatformIsEnabled) && sA11yShouldBeEnabled);
}
void PlatformInit() {}
void PlatformShutdown() {}
void ProxyCreated(ProxyAccessible* aProxy, uint32_t) {
ProxyAccessible* parent = aProxy->Parent();
if ((parent && nsAccUtils::MustPrune(parent)) ||
aProxy->Role() == roles::WHITESPACE) {
// We don't create a native object if we're child of a "flat" accessible;
// for example, on OS X buttons shouldn't have any children, because that
// makes the OS confused. We also don't create accessibles for <br>
// (whitespace) elements.
return;
}
// Pass in dummy state for now as retrieving proxy state requires IPC.
// Note that we can use ProxyAccessible::IsTable* functions here because they
// do not use IPC calls but that might change after bug 1210477.
Class type;
if (aProxy->IsTable()) {
type = [mozTableAccessible class];
} else if (aProxy->IsTableRow()) {
type = [mozTableRowAccessible class];
} else if (aProxy->IsTableCell()) {
type = [mozTableCellAccessible class];
} else if (aProxy->IsDoc()) {
type = [MOXWebAreaAccessible class];
} else {
type = GetTypeFromRole(aProxy->Role());
}
mozAccessible* mozWrapper = [[type alloc] initWithAccessible:aProxy];
aProxy->SetWrapper(reinterpret_cast<uintptr_t>(mozWrapper));
}
void ProxyDestroyed(ProxyAccessible* aProxy) {
mozAccessible* wrapper = GetNativeFromGeckoAccessible(aProxy);
[wrapper expire];
[wrapper release];
aProxy->SetWrapper(0);
if (aProxy->IsDoc()) {
[MOXTextMarkerDelegate destroyForDoc:aProxy];
}
}
void ProxyEvent(ProxyAccessible* aProxy, uint32_t aEventType) {
// Ignore event that we don't escape below, they aren't yet supported.
if (aEventType != nsIAccessibleEvent::EVENT_FOCUS &&
aEventType != nsIAccessibleEvent::EVENT_VALUE_CHANGE &&
aEventType != nsIAccessibleEvent::EVENT_TEXT_VALUE_CHANGE &&
aEventType != nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED &&
aEventType != nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_COMPLETE &&
aEventType != nsIAccessibleEvent::EVENT_REORDER &&
aEventType != nsIAccessibleEvent::EVENT_LIVE_REGION_ADDED &&
aEventType != nsIAccessibleEvent::EVENT_LIVE_REGION_REMOVED &&
aEventType != nsIAccessibleEvent::EVENT_NAME_CHANGE)
return;
mozAccessible* wrapper = GetNativeFromGeckoAccessible(aProxy);
if (wrapper) {
[wrapper handleAccessibleEvent:aEventType];
}
}
void ProxyStateChangeEvent(ProxyAccessible* aProxy, uint64_t aState,
bool aEnabled) {
mozAccessible* wrapper = GetNativeFromGeckoAccessible(aProxy);
if (wrapper) {
[wrapper stateChanged:aState isEnabled:aEnabled];
}
}
void ProxyCaretMoveEvent(ProxyAccessible* aTarget, int32_t aOffset,
bool aIsSelectionCollapsed) {
mozAccessible* wrapper = GetNativeFromGeckoAccessible(aTarget);
if (aIsSelectionCollapsed) {
// If selection is collapsed, invalidate selection.
MOXTextMarkerDelegate* delegate =
[MOXTextMarkerDelegate getOrCreateForDoc:aTarget->Document()];
[delegate setSelectionFrom:aTarget at:aOffset to:aTarget at:aOffset];
}
if (wrapper) {
if (mozTextAccessible* textAcc =
static_cast<mozTextAccessible*>([wrapper moxEditableAncestor])) {
[textAcc
handleAccessibleEvent:nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED];
} else {
[wrapper
handleAccessibleEvent:nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED];
}
}
}
void ProxyTextChangeEvent(ProxyAccessible* aTarget, const nsString& aStr,
int32_t aStart, uint32_t aLen, bool aIsInsert,
bool aFromUser) {
ProxyAccessible* acc = aTarget;
// If there is a text input ancestor, use it as the event source.
while (acc && GetTypeFromRole(acc->Role()) != [mozTextAccessible class]) {
acc = acc->Parent();
}
mozAccessible* wrapper = GetNativeFromGeckoAccessible(acc ? acc : aTarget);
[wrapper handleAccessibleTextChangeEvent:nsCocoaUtils::ToNSString(aStr)
inserted:aIsInsert
inContainer:aTarget
at:aStart];
}
void ProxyShowHideEvent(ProxyAccessible*, ProxyAccessible*, bool, bool) {}
void ProxySelectionEvent(ProxyAccessible* aTarget, ProxyAccessible* aWidget,
uint32_t aEventType) {
mozAccessible* wrapper = GetNativeFromGeckoAccessible(aWidget);
if (wrapper) {
[wrapper handleAccessibleEvent:aEventType];
}
}
void ProxyTextSelectionChangeEvent(ProxyAccessible* aTarget,
const nsTArray<TextRangeData>& aSelection) {
if (aSelection.Length()) {
MOXTextMarkerDelegate* delegate =
[MOXTextMarkerDelegate getOrCreateForDoc:aTarget->Document()];
DocAccessibleParent* doc = aTarget->Document();
ProxyAccessible* startContainer =
doc->GetAccessible(aSelection[0].StartID());
ProxyAccessible* endContainer = doc->GetAccessible(aSelection[0].EndID());
// Cache the selection.
[delegate setSelectionFrom:startContainer
at:aSelection[0].StartOffset()
to:endContainer
at:aSelection[0].EndOffset()];
}
mozAccessible* wrapper = GetNativeFromGeckoAccessible(aTarget);
if (wrapper) {
[wrapper
handleAccessibleEvent:nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED];
}
}
void ProxyRoleChangedEvent(ProxyAccessible* aTarget, const a11y::role& aRole) {
if (mozAccessible* wrapper = GetNativeFromGeckoAccessible(aTarget)) {
[wrapper handleRoleChanged:aRole];
}
}
} // namespace a11y
} // namespace mozilla
@interface GeckoNSApplication (a11y)
- (void)accessibilitySetValue:(id)value forAttribute:(NSString*)attribute;
@end
@implementation GeckoNSApplication (a11y)
- (void)accessibilitySetValue:(id)value forAttribute:(NSString*)attribute {
if ([attribute isEqualToString:@"AXEnhancedUserInterface"]) {
mozilla::a11y::sA11yShouldBeEnabled = ([value intValue] == 1);
#if defined(MOZ_TELEMETRY_REPORTING)
if ([[NSWorkspace sharedWorkspace]
respondsToSelector:@selector(isVoiceOverEnabled)] &&
[[NSWorkspace sharedWorkspace] isVoiceOverEnabled]) {
Telemetry::ScalarSet(Telemetry::ScalarID::A11Y_INSTANTIATORS,
u"VoiceOver"_ns);
}
#endif // defined(MOZ_TELEMETRY_REPORTING)
}
return [super accessibilitySetValue:value forAttribute:attribute];
}
@end