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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 "DumpRenderTree.h"
#import "AccessibilityNotificationHandler.h"
#import "AccessibilityUIElement.h"
#import <JavaScriptCore/JSRetainPtr.h>
#import <JavaScriptCore/JSStringRef.h>
#import <JavaScriptCore/JSStringRefCF.h>
#import <WebKit/WebFrame.h>
#import <WebKit/WebTypesInternal.h>
#import <wtf/RetainPtr.h>
@interface NSObject (WebAccessibilityObjectWrapperAdditions)
+ (void)accessibilitySetShouldRepostNotifications:(BOOL)repost;
@end
@interface NSString (JSStringRefAdditions)
- (JSStringRef)createJSStringRef;
@end
@implementation NSString (JSStringRefAdditions)
- (JSStringRef)createJSStringRef
{
return JSStringCreateWithCFString((CFStringRef)self);
}
@end
@implementation AccessibilityNotificationHandler
- (id)init
{
if (!(self = [super init]))
return nil;
m_platformElement = nil;
return self;
}
- (void)setPlatformElement:(id)platformElement
{
m_platformElement = platformElement;
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
JSValueUnprotect([mainFrame globalContext], m_notificationFunctionCallback);
m_notificationFunctionCallback = 0;
[super dealloc];
}
- (void)setCallback:(JSObjectRef)callback
{
if (!callback)
return;
if (m_notificationFunctionCallback)
JSValueUnprotect([mainFrame globalContext], m_notificationFunctionCallback);
m_notificationFunctionCallback = callback;
JSValueProtect([mainFrame globalContext], m_notificationFunctionCallback);
}
- (void)startObserving
{
// Once we start requesting notifications, it's on for the duration of the program.
// This is to avoid any race conditions between tests turning this flag on and off. Instead
// AccessibilityNotificationHandler can ignore events it doesn't care about.
id webAccessibilityObjectWrapperClass = NSClassFromString(@"WebAccessibilityObjectWrapper");
ASSERT(webAccessibilityObjectWrapperClass);
[webAccessibilityObjectWrapperClass accessibilitySetShouldRepostNotifications:YES];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_notificationReceived:) name:@"AXDRTNotification" object:nil];
}
- (void)_notificationReceived:(NSNotification *)notification
{
NSString *notificationName = [[notification userInfo] objectForKey:@"notificationName"];
if (!notificationName)
return;
if (m_platformElement && m_platformElement != [notification object])
return;
JSRetainPtr<JSStringRef> jsNotification(Adopt, [notificationName createJSStringRef]);
JSValueRef notificationNameArgument = JSValueMakeString([mainFrame globalContext], jsNotification.get());
if (m_platformElement) {
// Listener for one element just gets one argument, the notification name.
JSObjectCallAsFunction([mainFrame globalContext], m_notificationFunctionCallback, 0, 1, ¬ificationNameArgument, 0);
} else {
// A global listener gets the element and the notification name as arguments.
JSValueRef arguments[2];
arguments[0] = AccessibilityUIElement::makeJSAccessibilityUIElement([mainFrame globalContext], AccessibilityUIElement([notification object]));
arguments[1] = notificationNameArgument;
JSObjectCallAsFunction([mainFrame globalContext], m_notificationFunctionCallback, 0, 2, arguments, 0);
}
}
@end
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