/*

 * Copyright (C) 2005 Apple Computer, 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. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 "JSValueWrapper.h"

#include <JavaScriptCore/PropertyNameArray.h>

#include <pthread.h>

JSValueWrapper::JSValueWrapper(JSValue *inValue)

    : fValue(inValue)

{

}

JSValueWrapper::~JSValueWrapper()

{

}

JSValue *JSValueWrapper::GetValue()

{

    return fValue;

}

/*

 * This is a slight hack. The JSGlue API has no concept of execution state.

 * However, execution state is an inherent part of JS, and JSCore requires it.

 * So, we keep a single execution state for the whole thread and supply it

 * where necessary.

 * The execution state holds two things: (1) exceptions; (2) the global object. 

 * JSGlue has no API for accessing exceptions, so we just discard them. As for

 * the global object, JSGlue includes no calls that depend on it. Its property

 * getters and setters are per-object; they don't walk up the enclosing scope. 

 * Functions called by JSObjectCallFunction may reference values in the enclosing 

 * scope, but they do so through an internally stored scope chain, so we don't 

 * need to supply the global scope.

 */      

pthread_key_t interpreterKey;

pthread_once_t interpreterKeyOnce = PTHREAD_ONCE_INIT;

static void derefInterpreter(void* data) 

{

    static_cast<Interpreter*>(data)->deref();

}

static void initializeInterpreterKey()

{

    pthread_key_create(&interpreterKey, derefInterpreter);

}

static ExecState* getThreadGlobalExecState()

{

    pthread_once(&interpreterKeyOnce, initializeInterpreterKey);

    Interpreter* interpreter = static_cast<Interpreter*>(pthread_getspecific(interpreterKey));

    if (!interpreter) {

        interpreter = new Interpreter();

        interpreter->ref();

        pthread_setspecific(interpreterKey, interpreter);

    }

    // Discard exceptions -- otherwise an exception would forestall JS 

    // evaluation throughout the thread

    interpreter->globalExec()->clearException();

    return interpreter->globalExec();

}

void JSValueWrapper::GetJSObectCallBacks(JSObjectCallBacks& callBacks)

{

    callBacks.dispose = (JSObjectDisposeProcPtr)JSValueWrapper::JSObjectDispose;

    callBacks.equal = (JSObjectEqualProcPtr)0;

    callBacks.copyPropertyNames = (JSObjectCopyPropertyNamesProcPtr)JSValueWrapper::JSObjectCopyPropertyNames;

    callBacks.copyCFValue = (JSObjectCopyCFValueProcPtr)JSValueWrapper::JSObjectCopyCFValue;

    callBacks.copyProperty = (JSObjectCopyPropertyProcPtr)JSValueWrapper::JSObjectCopyProperty;

    callBacks.setProperty = (JSObjectSetPropertyProcPtr)JSValueWrapper::JSObjectSetProperty;

    callBacks.callFunction = (JSObjectCallFunctionProcPtr)JSValueWrapper::JSObjectCallFunction;

}

void JSValueWrapper::JSObjectDispose(void *data)

{

    JSValueWrapper* ptr = (JSValueWrapper*)data;

    delete ptr;

}

CFArrayRef JSValueWrapper::JSObjectCopyPropertyNames(void *data)

{

    JSLock lock;

    CFMutableArrayRef result = 0;

    JSValueWrapper* ptr = (JSValueWrapper*)data;

    if (ptr)

    {

        ExecState* exec = getThreadGlobalExecState();

        JSObject *object = ptr->GetValue()->toObject(exec);

        PropertyNameArray propNames;

        object->getPropertyNames(exec, propNames);

        PropertyNameArrayIterator iterator = propNames.begin();

        while (iterator != propNames.end()) {

            Identifier name = *iterator;

            CFStringRef nameStr = IdentifierToCFString(name);

            if (!result)

            {

                result = CFArrayCreateMutable(0, 0, &kCFTypeArrayCallBacks);

            }

            if (result && nameStr)

            {

                CFArrayAppendValue(result, nameStr);

            }

            ReleaseCFType(nameStr);

            iterator++;

        }

    }

    return result;

}

JSObjectRef JSValueWrapper::JSObjectCopyProperty(void *data, CFStringRef propertyName)

{

    JSLock lock;

    JSObjectRef result = 0;

    JSValueWrapper* ptr = (JSValueWrapper*)data;

    if (ptr)

    {

        ExecState* exec = getThreadGlobalExecState();

        JSValue *propValue = ptr->GetValue()->toObject(exec)->get(exec, CFStringToIdentifier(propertyName));

        JSValueWrapper* wrapperValue = new JSValueWrapper(propValue);

        JSObjectCallBacks callBacks;

        GetJSObectCallBacks(callBacks);

        result = JSObjectCreateInternal(wrapperValue, &callBacks, JSValueWrapper::JSObjectMark, kJSUserObjectDataTypeJSValueWrapper);

        if (!result)

        {

            delete wrapperValue;

        }

    }

    return result;

}

void JSValueWrapper::JSObjectSetProperty(void *data, CFStringRef propertyName, JSObjectRef jsValue)

{

    JSLock lock;

    JSValueWrapper* ptr = (JSValueWrapper*)data;

    if (ptr)

    {

        ExecState* exec = getThreadGlobalExecState();

        JSValue *value = JSObjectKJSValue((JSUserObject*)jsValue);

        JSObject *objValue = ptr->GetValue()->toObject(exec);

        objValue->put(exec, CFStringToIdentifier(propertyName), value);

    }

}

JSObjectRef JSValueWrapper::JSObjectCallFunction(void *data, JSObjectRef thisObj, CFArrayRef args)

{

    JSLock lock;

    JSObjectRef result = 0;

    JSValueWrapper* ptr = (JSValueWrapper*)data;

    if (ptr)

    {

        ExecState* exec = getThreadGlobalExecState();

        JSValue *value = JSObjectKJSValue((JSUserObject*)thisObj);

        JSObject *ksjThisObj = value->toObject(exec);

        JSObject *objValue = ptr->GetValue()->toObject(exec);

        List listArgs;

        CFIndex argCount = args ? CFArrayGetCount(args) : 0;

        for (CFIndex i = 0; i < argCount; i++)

        {

            JSObjectRef jsArg = (JSObjectRef)CFArrayGetValueAtIndex(args, i);

            JSValue *kgsArg = JSObjectKJSValue((JSUserObject*)jsArg);

            listArgs.append(kgsArg);

        }

        JSValue *resultValue = objValue->call(exec, ksjThisObj, listArgs);

        JSValueWrapper* wrapperValue = new JSValueWrapper(resultValue);

        JSObjectCallBacks callBacks;

        GetJSObectCallBacks(callBacks);

        result = JSObjectCreate(wrapperValue, &callBacks);

        if (!result)

        {

            delete wrapperValue;

        }

    }

    return result;

}

CFTypeRef JSValueWrapper::JSObjectCopyCFValue(void *data)

{

    JSLock lock;

    CFTypeRef result = 0;

    JSValueWrapper* ptr = (JSValueWrapper*)data;

    if (ptr)

    {

        result = KJSValueToCFType(ptr->GetValue(), getThreadGlobalExecState());

    }

    return result;

}

void JSValueWrapper::JSObjectMark(void *data)

{

    JSValueWrapper* ptr = (JSValueWrapper*)data;

    if (ptr)

    {

        ptr->fValue->mark();

    }

}