webengine/osswebengine/JavaScriptGlue/JSValueWrapper.cpp
author Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
Mon, 30 Mar 2009 12:54:55 +0300
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/*
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 * Copyright (C) 2005 Apple Computer, Inc.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * 1.  Redistributions of source code must retain the above copyright
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 *     notice, this list of conditions and the following disclaimer. 
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 * 2.  Redistributions in binary form must reproduce the above copyright
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 *     notice, this list of conditions and the following disclaimer in the
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 *     documentation and/or other materials provided with the distribution. 
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 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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 *     its contributors may be used to endorse or promote products derived
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 *     from this software without specific prior written permission. 
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 *
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 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include "config.h"
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#include "JSValueWrapper.h"
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#include <JavaScriptCore/PropertyNameArray.h>
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#include <pthread.h>
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JSValueWrapper::JSValueWrapper(JSValue *inValue)
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    : fValue(inValue)
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{
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}
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JSValueWrapper::~JSValueWrapper()
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{
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}
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JSValue *JSValueWrapper::GetValue()
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{
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    return fValue;
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}
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/*
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 * This is a slight hack. The JSGlue API has no concept of execution state.
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 * However, execution state is an inherent part of JS, and JSCore requires it.
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 * So, we keep a single execution state for the whole thread and supply it
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 * where necessary.
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 * The execution state holds two things: (1) exceptions; (2) the global object. 
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 * JSGlue has no API for accessing exceptions, so we just discard them. As for
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 * the global object, JSGlue includes no calls that depend on it. Its property
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 * getters and setters are per-object; they don't walk up the enclosing scope. 
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 * Functions called by JSObjectCallFunction may reference values in the enclosing 
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 * scope, but they do so through an internally stored scope chain, so we don't 
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 * need to supply the global scope.
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 */      
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pthread_key_t interpreterKey;
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pthread_once_t interpreterKeyOnce = PTHREAD_ONCE_INIT;
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static void derefInterpreter(void* data) 
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{
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    static_cast<Interpreter*>(data)->deref();
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}
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static void initializeInterpreterKey()
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{
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    pthread_key_create(&interpreterKey, derefInterpreter);
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}
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static ExecState* getThreadGlobalExecState()
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{
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    pthread_once(&interpreterKeyOnce, initializeInterpreterKey);
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    Interpreter* interpreter = static_cast<Interpreter*>(pthread_getspecific(interpreterKey));
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    if (!interpreter) {
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        interpreter = new Interpreter();
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        interpreter->ref();
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        pthread_setspecific(interpreterKey, interpreter);
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    }
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    // Discard exceptions -- otherwise an exception would forestall JS 
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    // evaluation throughout the thread
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    interpreter->globalExec()->clearException();
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    return interpreter->globalExec();
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}
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void JSValueWrapper::GetJSObectCallBacks(JSObjectCallBacks& callBacks)
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{
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    callBacks.dispose = (JSObjectDisposeProcPtr)JSValueWrapper::JSObjectDispose;
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    callBacks.equal = (JSObjectEqualProcPtr)0;
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    callBacks.copyPropertyNames = (JSObjectCopyPropertyNamesProcPtr)JSValueWrapper::JSObjectCopyPropertyNames;
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    callBacks.copyCFValue = (JSObjectCopyCFValueProcPtr)JSValueWrapper::JSObjectCopyCFValue;
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    callBacks.copyProperty = (JSObjectCopyPropertyProcPtr)JSValueWrapper::JSObjectCopyProperty;
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    callBacks.setProperty = (JSObjectSetPropertyProcPtr)JSValueWrapper::JSObjectSetProperty;
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    callBacks.callFunction = (JSObjectCallFunctionProcPtr)JSValueWrapper::JSObjectCallFunction;
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}
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void JSValueWrapper::JSObjectDispose(void *data)
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{
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    JSValueWrapper* ptr = (JSValueWrapper*)data;
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    delete ptr;
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}
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CFArrayRef JSValueWrapper::JSObjectCopyPropertyNames(void *data)
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{
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    JSLock lock;
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    CFMutableArrayRef result = 0;
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    JSValueWrapper* ptr = (JSValueWrapper*)data;
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   117
    if (ptr)
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   118
    {
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   119
        ExecState* exec = getThreadGlobalExecState();
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   120
        JSObject *object = ptr->GetValue()->toObject(exec);
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   121
        PropertyNameArray propNames;
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   122
        object->getPropertyNames(exec, propNames);
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   123
        PropertyNameArrayIterator iterator = propNames.begin();
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   124
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   125
        while (iterator != propNames.end()) {
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   126
            Identifier name = *iterator;
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   127
            CFStringRef nameStr = IdentifierToCFString(name);
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   128
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   129
            if (!result)
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   130
            {
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   131
                result = CFArrayCreateMutable(0, 0, &kCFTypeArrayCallBacks);
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   132
            }
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parents:
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   133
            if (result && nameStr)
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   134
            {
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   135
                CFArrayAppendValue(result, nameStr);
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   136
            }
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   137
            ReleaseCFType(nameStr);
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   138
            iterator++;
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   139
        }
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   140
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   141
    }
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   142
    return result;
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parents:
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   143
}
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   144
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   145
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   146
JSObjectRef JSValueWrapper::JSObjectCopyProperty(void *data, CFStringRef propertyName)
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   147
{
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   148
    JSLock lock;
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   149
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   150
    JSObjectRef result = 0;
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   151
    JSValueWrapper* ptr = (JSValueWrapper*)data;
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   152
    if (ptr)
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   153
    {
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   154
        ExecState* exec = getThreadGlobalExecState();
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   155
        JSValue *propValue = ptr->GetValue()->toObject(exec)->get(exec, CFStringToIdentifier(propertyName));
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parents:
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   156
        JSValueWrapper* wrapperValue = new JSValueWrapper(propValue);
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   157
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        JSObjectCallBacks callBacks;
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parents:
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   159
        GetJSObectCallBacks(callBacks);
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parents:
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   160
        result = JSObjectCreateInternal(wrapperValue, &callBacks, JSValueWrapper::JSObjectMark, kJSUserObjectDataTypeJSValueWrapper);
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parents:
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   161
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   162
        if (!result)
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parents:
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   163
        {
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   164
            delete wrapperValue;
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parents:
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   165
        }
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parents:
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   166
    }
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parents:
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   167
    return result;
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parents:
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   168
}
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parents:
diff changeset
   169
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   170
void JSValueWrapper::JSObjectSetProperty(void *data, CFStringRef propertyName, JSObjectRef jsValue)
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   171
{
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   172
    JSLock lock;
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parents:
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   173
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   174
    JSValueWrapper* ptr = (JSValueWrapper*)data;
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parents:
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   175
    if (ptr)
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   176
    {
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   177
        ExecState* exec = getThreadGlobalExecState();
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parents:
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   178
        JSValue *value = JSObjectKJSValue((JSUserObject*)jsValue);
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parents:
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   179
        JSObject *objValue = ptr->GetValue()->toObject(exec);
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parents:
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   180
        objValue->put(exec, CFStringToIdentifier(propertyName), value);
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   181
    }
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parents:
diff changeset
   182
}
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parents:
diff changeset
   183
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parents:
diff changeset
   184
JSObjectRef JSValueWrapper::JSObjectCallFunction(void *data, JSObjectRef thisObj, CFArrayRef args)
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parents:
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   185
{
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   186
    JSLock lock;
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parents:
diff changeset
   187
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   188
    JSObjectRef result = 0;
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parents:
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   189
    JSValueWrapper* ptr = (JSValueWrapper*)data;
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parents:
diff changeset
   190
    if (ptr)
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   191
    {
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   192
        ExecState* exec = getThreadGlobalExecState();
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parents:
diff changeset
   193
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parents:
diff changeset
   194
        JSValue *value = JSObjectKJSValue((JSUserObject*)thisObj);
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Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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   195
        JSObject *ksjThisObj = value->toObject(exec);
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parents:
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   196
        JSObject *objValue = ptr->GetValue()->toObject(exec);
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parents:
diff changeset
   197
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   198
        List listArgs;
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parents:
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   199
        CFIndex argCount = args ? CFArrayGetCount(args) : 0;
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parents:
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   200
        for (CFIndex i = 0; i < argCount; i++)
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parents:
diff changeset
   201
        {
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diff changeset
   202
            JSObjectRef jsArg = (JSObjectRef)CFArrayGetValueAtIndex(args, i);
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Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff changeset
   203
            JSValue *kgsArg = JSObjectKJSValue((JSUserObject*)jsArg);
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Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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   204
            listArgs.append(kgsArg);
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parents:
diff changeset
   205
        }
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parents:
diff changeset
   206
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   207
        JSValue *resultValue = objValue->call(exec, ksjThisObj, listArgs);
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parents:
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   208
        JSValueWrapper* wrapperValue = new JSValueWrapper(resultValue);
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parents:
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   209
        JSObjectCallBacks callBacks;
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parents:
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   210
        GetJSObectCallBacks(callBacks);
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parents:
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   211
        result = JSObjectCreate(wrapperValue, &callBacks);
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parents:
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   212
        if (!result)
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   213
        {
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   214
            delete wrapperValue;
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diff changeset
   215
        }
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parents:
diff changeset
   216
    }
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parents:
diff changeset
   217
    return result;
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parents:
diff changeset
   218
}
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Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff changeset
   219
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   220
CFTypeRef JSValueWrapper::JSObjectCopyCFValue(void *data)
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parents:
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   221
{
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   222
    JSLock lock;
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parents:
diff changeset
   223
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   224
    CFTypeRef result = 0;
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parents:
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   225
    JSValueWrapper* ptr = (JSValueWrapper*)data;
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parents:
diff changeset
   226
    if (ptr)
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   227
    {
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   228
        result = KJSValueToCFType(ptr->GetValue(), getThreadGlobalExecState());
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diff changeset
   229
    }
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parents:
diff changeset
   230
    return result;
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parents:
diff changeset
   231
}
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parents:
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   232
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   233
void JSValueWrapper::JSObjectMark(void *data)
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parents:
diff changeset
   234
{
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   235
    JSValueWrapper* ptr = (JSValueWrapper*)data;
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parents:
diff changeset
   236
    if (ptr)
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parents:
diff changeset
   237
    {
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Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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        ptr->fValue->mark();
dd21522fd290 Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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    }
dd21522fd290 Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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   240
}