DOMTreeWalker.mm   [plain text]

/*
* Copyright (C) 2004-2016 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 "DOMTreeWalkerInternal.h"

#import "DOMInternal.h"
#import "DOMNodeInternal.h"
#import "ExceptionHandlers.h"
#import <WebCore/JSMainThreadExecState.h>
#import <WebCore/NativeNodeFilter.h>
#import <WebCore/Node.h>
#import "ObjCNodeFilterCondition.h"
#import <WebCore/ThreadCheck.h>
#import <WebCore/TreeWalker.h>
#import <WebCore/WebCoreObjCExtras.h>
#import <WebCore/WebScriptObjectPrivate.h>
#import <wtf/GetPtr.h>

#define IMPL reinterpret_cast<WebCore::TreeWalker*>(_internal)

@implementation DOMTreeWalker

- (void)dealloc
{
if (WebCoreObjCScheduleDeallocateOnMainThread([DOMTreeWalker class], self))
return;

if (_internal)
IMPL->deref();
[super dealloc];
}

- (DOMNode *)root
{
WebCore::JSMainThreadNullState state;
return kit(WTF::getPtr(IMPL->root()));
}

- (unsigned)whatToShow
{
WebCore::JSMainThreadNullState state;
return IMPL->whatToShow();
}

- (id <DOMNodeFilter>)filter
{
WebCore::JSMainThreadNullState state;
return kit(IMPL->filter());
}

- (BOOL)expandEntityReferences
{
return NO;
}

- (DOMNode *)currentNode
{
WebCore::JSMainThreadNullState state;
return kit(WTF::getPtr(IMPL->currentNode()));
}

- (void)setCurrentNode:(DOMNode *)newCurrentNode
{
WebCore::JSMainThreadNullState state;
ASSERT(newCurrentNode);

if (!core(newCurrentNode))
raiseTypeErrorException();
IMPL->setCurrentNode(*core(newCurrentNode));
}

- (DOMNode *)parentNode
{
WebCore::JSMainThreadNullState state;

auto result = IMPL->parentNode();
if (result.hasException())
return nil;

return kit(WTF::getPtr(result.releaseReturnValue()));
}

- (DOMNode *)firstChild
{
WebCore::JSMainThreadNullState state;

auto result = IMPL->firstChild();
if (result.hasException())
return nil;

return kit(WTF::getPtr(result.releaseReturnValue()));
}

- (DOMNode *)lastChild
{
WebCore::JSMainThreadNullState state;

auto result = IMPL->lastChild();
if (result.hasException())
return nil;

return kit(WTF::getPtr(result.releaseReturnValue()));
}

- (DOMNode *)previousSibling
{
WebCore::JSMainThreadNullState state;

auto result = IMPL->previousSibling();
if (result.hasException())
return nil;

return kit(WTF::getPtr(result.releaseReturnValue()));
}

- (DOMNode *)nextSibling
{
WebCore::JSMainThreadNullState state;

auto result = IMPL->nextSibling();
if (result.hasException())
return nil;

return kit(WTF::getPtr(result.releaseReturnValue()));
}

- (DOMNode *)previousNode
{
WebCore::JSMainThreadNullState state;

auto result = IMPL->previousNode();
if (result.hasException())
return nil;

return kit(WTF::getPtr(result.releaseReturnValue()));
}

- (DOMNode *)nextNode
{
WebCore::JSMainThreadNullState state;

auto result = IMPL->nextNode();
if (result.hasException())
return nil;

return kit(WTF::getPtr(result.releaseReturnValue()));
}

@end

DOMTreeWalker *kit(WebCore::TreeWalker* value)
{
WebCoreThreadViolationCheckRoundOne();
if (!value)
return nil;
if (DOMTreeWalker *wrapper = getDOMWrapper(value))
return [[wrapper retain] autorelease];
DOMTreeWalker *wrapper = [[DOMTreeWalker alloc] _init];
wrapper->_internal = reinterpret_cast<DOMObjectInternal*>(value);
value->ref();
addDOMWrapper(wrapper, value);
return [wrapper autorelease];
}