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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#import "config.h"
#import "AccessibilityCommonMac.h"
#import "AccessibilityController.h"
#import "AccessibilityNotificationHandler.h"
#import "InjectedBundle.h"
#import "InjectedBundlePage.h"
#import <JavaScriptCore/JSRetainPtr.h>
#import <JavaScriptCore/JSStringRef.h>
#import <JavaScriptCore/JSStringRefCF.h>
#import <WebKit2/WKBundle.h>
#import <WebKit2/WKBundlePage.h>
#import <WebKit2/WKBundlePagePrivate.h>
namespace WTR {
bool AccessibilityController::addNotificationListener(JSValueRef functionCallback)
{
if (!functionCallback)
return false;
// Mac programmers should not be adding more than one global notification listener.
// Other platforms may be different.
if (m_globalNotificationHandler)
return false;
m_globalNotificationHandler = [[AccessibilityNotificationHandler alloc] init];
[m_globalNotificationHandler.get() setCallback:functionCallback];
[m_globalNotificationHandler.get() startObserving];
return true;
}
bool AccessibilityController::removeNotificationListener()
{
// Mac programmers should not be trying to remove a listener that's already removed.
ASSERT(m_globalNotificationHandler);
m_globalNotificationHandler.clear();
return true;
}
static id findAccessibleObjectById(id obj, NSString *idAttribute)
{
BEGIN_AX_OBJC_EXCEPTIONS
id objIdAttribute = [obj accessibilityAttributeValue:@"AXDRTElementIdAttribute"];
if ([objIdAttribute isKindOfClass:[NSString class]] && [objIdAttribute isEqualToString:idAttribute])
return obj;
END_AX_OBJC_EXCEPTIONS
NSArray *children = [obj accessibilityAttributeValue:NSAccessibilityChildrenAttribute];
NSUInteger childrenCount = [children count];
for (NSUInteger i = 0; i < childrenCount; ++i) {
id result = findAccessibleObjectById([children objectAtIndex:i], idAttribute);
if (result)
return result;
}
return 0;
}
PassRefPtr<AccessibilityUIElement> AccessibilityController::accessibleElementById(JSStringRef idAttribute)
{
WKBundlePageRef page = InjectedBundle::shared().page()->page();
id root = static_cast<PlatformUIElement>(WKAccessibilityRootObject(page));
id result = findAccessibleObjectById(root, [NSString stringWithJSStringRef:idAttribute]);
if (result)
return AccessibilityUIElement::create(result);
return 0;
}
} // namespace WTR
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