blob: a94de3860d9cc41e6bf8cf0fe37d79b53bcbbe63 [file] [log] [blame]
/*
* 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 "AccessibilityController.h"
#import "AccessibilityCommonMac.h"
#import "AccessibilityNotificationHandler.h"
#import "InjectedBundle.h"
#import "InjectedBundlePage.h"
#import <JavaScriptCore/JSStringRefCF.h>
#import <WebKit/WKBundle.h>
#import <WebKit/WKBundlePage.h>
#import <WebKit/WKBundlePagePrivate.h>
namespace WTR {
bool AccessibilityController::addNotificationListener(JSValueRef functionCallback)
{
if (!functionCallback)
return false;
if (m_globalNotificationHandler)
return false;
m_globalNotificationHandler = adoptNS([[AccessibilityNotificationHandler alloc] init]);
[m_globalNotificationHandler.get() setCallback:functionCallback];
[m_globalNotificationHandler.get() startObserving];
return true;
}
bool AccessibilityController::removeNotificationListener()
{
ASSERT(m_globalNotificationHandler);
[m_globalNotificationHandler.get() stopObserving];
m_globalNotificationHandler.clear();
return true;
}
void AccessibilityController::resetToConsistentState()
{
if (m_globalNotificationHandler)
removeNotificationListener();
}
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
BEGIN_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;
}
END_AX_OBJC_EXCEPTIONS
return nullptr;
}
RefPtr<AccessibilityUIElement> AccessibilityController::accessibleElementById(JSStringRef idAttribute)
{
WKBundlePageRef page = InjectedBundle::singleton().page()->page();
PlatformUIElement root = nullptr;
executeOnAXThreadIfPossible([&page, &root] {
root = static_cast<PlatformUIElement>(WKAccessibilityRootObject(page));
});
// Now that we have a root and the isolated tree is generated, set
// m_useAXThread to true for next request to be handled in the secondary thread.
if (WKAccessibilityCanUseSecondaryAXThread(InjectedBundle::singleton().page()->page()))
m_useAXThread = true;
id result;
executeOnAXThreadIfPossible([&root, &idAttribute, &result] {
result = findAccessibleObjectById(root, [NSString stringWithJSStringRef:idAttribute]);
});
if (result)
return AccessibilityUIElement::create(result);
return nullptr;
}
JSRetainPtr<JSStringRef> AccessibilityController::platformName()
{
return adopt(JSStringCreateWithUTF8CString("mac"));
}
// AXThread implementation
void AXThread::initializeRunLoop()
{
// Initialize the run loop.
{
std::lock_guard<Lock> lock(m_initializeRunLoopMutex);
m_threadRunLoop = CFRunLoopGetCurrent();
CFRunLoopSourceContext context = { 0, this, 0, 0, 0, 0, 0, 0, 0, threadRunLoopSourceCallback };
m_threadRunLoopSource = adoptCF(CFRunLoopSourceCreate(0, 0, &context));
CFRunLoopAddSource(CFRunLoopGetCurrent(), m_threadRunLoopSource.get(), kCFRunLoopDefaultMode);
m_initializeRunLoopConditionVariable.notifyAll();
}
ASSERT(isCurrentThread());
CFRunLoopRun();
}
void AXThread::wakeUpRunLoop()
{
CFRunLoopSourceSignal(m_threadRunLoopSource.get());
CFRunLoopWakeUp(m_threadRunLoop.get());
}
void AXThread::threadRunLoopSourceCallback(void* axThread)
{
static_cast<AXThread*>(axThread)->threadRunLoopSourceCallback();
}
void AXThread::threadRunLoopSourceCallback()
{
@autoreleasepool {
dispatchFunctionsFromAXThread();
}
}
} // namespace WTR