gecko-dev/accessible/mac/Platform.mm

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/* -*- Mode: Objective-C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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>
#include "Platform.h"
#include "ProxyAccessible.h"
#include "nsAppShell.h"
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)
{
// Pass in dummy state for now as retrieving proxy state requires IPC.
Class type = GetTypeFromRole(aProxy->Role());
uintptr_t accWrap = reinterpret_cast<uintptr_t>(aProxy) | IS_PROXY;
mozAccessible* mozWrapper = [[type alloc] initWithAccessible:accWrap];
aProxy->SetWrapper(reinterpret_cast<uintptr_t>(mozWrapper));
}
void
ProxyDestroyed(ProxyAccessible* aProxy)
{
mozAccessible* wrapper = GetNativeFromProxy(aProxy);
[wrapper expire];
[wrapper release];
aProxy->SetWrapper(0);
}
void
ProxyEvent(ProxyAccessible* aProxy, uint32_t aEventType)
{
// ignore everything but focus-changed, value-changed, caret and selection
// events for now.
if (aEventType != nsIAccessibleEvent::EVENT_FOCUS &&
aEventType != nsIAccessibleEvent::EVENT_VALUE_CHANGE &&
aEventType != nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED &&
aEventType != nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED)
return;
mozAccessible* wrapper = GetNativeFromProxy(aProxy);
if (wrapper)
FireNativeEvent(wrapper, aEventType);
}
void
ProxyStateChangeEvent(ProxyAccessible* aProxy, uint64_t, bool)
{
// mac doesn't care about state change events
}
void
ProxyCaretMoveEvent(ProxyAccessible* aTarget, int32_t aOffset)
{
mozAccessible* wrapper = GetNativeFromProxy(aTarget);
if (wrapper)
[wrapper selectedTextDidChange];
}
void
ProxyTextChangeEvent(ProxyAccessible*, const nsString&, int32_t, uint32_t,
bool, bool)
{
}
} // 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);
return [super accessibilitySetValue:value forAttribute:attribute];
}
@end