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      1 /*
      2  * Copyright (C) 2007 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "JSNodeList.h"
     28 
     29 #include "DynamicNodeList.h"
     30 #include "JSNode.h"
     31 #include "Node.h"
     32 #include "NodeList.h"
     33 #include <wtf/text/AtomicString.h>
     34 
     35 using namespace JSC;
     36 
     37 namespace WebCore {
     38 
     39 class JSNodeListOwner : public JSC::WeakHandleOwner {
     40     virtual bool isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown>, void* context, JSC::MarkStack&);
     41     virtual void finalize(JSC::Handle<JSC::Unknown>, void* context);
     42 };
     43 
     44 bool JSNodeListOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, MarkStack& markStack)
     45 {
     46     JSNodeList* jsNodeList = static_cast<JSNodeList*>(handle.get().asCell());
     47     if (!jsNodeList->hasCustomProperties())
     48         return false;
     49     if (!jsNodeList->impl()->isDynamicNodeList())
     50         return false;
     51     return markStack.containsOpaqueRoot(root(static_cast<DynamicNodeList*>(jsNodeList->impl())->rootNode()));
     52 }
     53 
     54 void JSNodeListOwner::finalize(JSC::Handle<JSC::Unknown> handle, void* context)
     55 {
     56     JSNodeList* jsNodeList = static_cast<JSNodeList*>(handle.get().asCell());
     57     DOMWrapperWorld* world = static_cast<DOMWrapperWorld*>(context);
     58     uncacheWrapper(world, jsNodeList->impl(), jsNodeList);
     59 }
     60 
     61 inline JSC::WeakHandleOwner* wrapperOwner(DOMWrapperWorld*, NodeList*)
     62 {
     63     DEFINE_STATIC_LOCAL(JSNodeListOwner, jsNodeListOwner, ());
     64     return &jsNodeListOwner;
     65 }
     66 
     67 inline void* wrapperContext(DOMWrapperWorld* world, NodeList*)
     68 {
     69     return world;
     70 }
     71 
     72 JSC::JSValue toJS(JSC::ExecState* exec, JSDOMGlobalObject* globalObject, NodeList* impl)
     73 {
     74     return wrap<JSNodeList>(exec, globalObject, impl);
     75 }
     76 
     77 // Need to support call so that list(0) works.
     78 static EncodedJSValue JSC_HOST_CALL callNodeList(ExecState* exec)
     79 {
     80     bool ok;
     81     unsigned index = Identifier::toUInt32(exec->argument(0).toString(exec), ok);
     82     if (!ok)
     83         return JSValue::encode(jsUndefined());
     84     return JSValue::encode(toJS(exec, static_cast<JSNodeList*>(exec->callee())->impl()->item(index)));
     85 }
     86 
     87 CallType JSNodeList::getCallData(CallData& callData)
     88 {
     89     callData.native.function = callNodeList;
     90     return CallTypeHost;
     91 }
     92 
     93 bool JSNodeList::canGetItemsForName(ExecState*, NodeList* impl, const Identifier& propertyName)
     94 {
     95     return impl->itemWithName(identifierToAtomicString(propertyName));
     96 }
     97 
     98 JSValue JSNodeList::nameGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
     99 {
    100     JSNodeList* thisObj = static_cast<JSNodeList*>(asObject(slotBase));
    101     return toJS(exec, thisObj->impl()->itemWithName(identifierToAtomicString(propertyName)));
    102 }
    103 
    104 } // namespace WebCore
    105