Source/WebCore/bindings/js/JSNodeListCustom.cpp

/*
 * Copyright (C) 2007 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 COMPUTER, 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 COMPUTER, 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. 
 */

#include "config.h"
#include "JSNodeList.h"

#include "DynamicNodeList.h"
#include "JSNode.h"
#include "Node.h"
#include "NodeList.h"
#include <wtf/text/AtomicString.h>

using namespace JSC;

namespace WebCore {

class JSNodeListOwner : public JSC::WeakHandleOwner {
    virtual bool isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown>, void* context, JSC::MarkStack&);
    virtual void finalize(JSC::Handle<JSC::Unknown>, void* context);
};

bool JSNodeListOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, MarkStack& markStack)
{
    JSNodeList* jsNodeList = static_cast<JSNodeList*>(handle.get().asCell());
    if (!jsNodeList->hasCustomProperties())
        return false;
    if (!jsNodeList->impl()->isDynamicNodeList())
        return false;
    return markStack.containsOpaqueRoot(root(static_cast<DynamicNodeList*>(jsNodeList->impl())->rootNode()));
}

void JSNodeListOwner::finalize(JSC::Handle<JSC::Unknown> handle, void* context)
{
    JSNodeList* jsNodeList = static_cast<JSNodeList*>(handle.get().asCell());
    DOMWrapperWorld* world = static_cast<DOMWrapperWorld*>(context);
    uncacheWrapper(world, jsNodeList->impl(), jsNodeList);
}

inline JSC::WeakHandleOwner* wrapperOwner(DOMWrapperWorld*, NodeList*)
{
    DEFINE_STATIC_LOCAL(JSNodeListOwner, jsNodeListOwner, ());
    return &jsNodeListOwner;
}

inline void* wrapperContext(DOMWrapperWorld* world, NodeList*)
{
    return world;
}

JSC::JSValue toJS(JSC::ExecState* exec, JSDOMGlobalObject* globalObject, NodeList* impl)
{
    return wrap<JSNodeList>(exec, globalObject, impl);
}

// Need to support call so that list(0) works.
static EncodedJSValue JSC_HOST_CALL callNodeList(ExecState* exec)
{
    bool ok;
    unsigned index = Identifier::toUInt32(exec->argument(0).toString(exec), ok);
    if (!ok)
        return JSValue::encode(jsUndefined());
    return JSValue::encode(toJS(exec, static_cast<JSNodeList*>(exec->callee())->impl()->item(index)));
}

CallType JSNodeList::getCallData(CallData& callData)
{
    callData.native.function = callNodeList;
    return CallTypeHost;
}

bool JSNodeList::canGetItemsForName(ExecState*, NodeList* impl, const Identifier& propertyName)
{
    return impl->itemWithName(identifierToAtomicString(propertyName));
}

JSValue JSNodeList::nameGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
{
    JSNodeList* thisObj = static_cast<JSNodeList*>(asObject(slotBase));
    return toJS(exec, thisObj->impl()->itemWithName(identifierToAtomicString(propertyName)));
}

} // namespace WebCore