WebCore/bridge/runtime_object.cpp - platform/external/webkit - Git at Google

 /*
  * Copyright (C) 2003, 2008, 2009 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 "runtime_object.h"

 #include "JSDOMBinding.h"
 #include "runtime_method.h"
 #include <runtime/Error.h>
 #include <runtime/ObjectPrototype.h>

 using namespace WebCore;

 namespace JSC {
 namespace Bindings {

 const ClassInfo RuntimeObject::s_info = { "RuntimeObject", 0, 0, 0 };

 RuntimeObject::RuntimeObject(ExecState* exec, PassRefPtr<Instance> instance)
     // FIXME: deprecatedGetDOMStructure uses the prototype off of the wrong global object
     // We need to pass in the right global object for "i".
     : JSObject(deprecatedGetDOMStructure<RuntimeObject>(exec))
     , m_instance(instance)
 {
 }

 RuntimeObject::RuntimeObject(ExecState*, NonNullPassRefPtr<Structure> structure, PassRefPtr<Instance> instance)
     : JSObject(structure)
     , m_instance(instance)
 {
 }

 RuntimeObject::~RuntimeObject()
 {
     if (m_instance)
         m_instance->willDestroyRuntimeObject();
 }

 void RuntimeObject::invalidate()
 {
     ASSERT(m_instance);
     if (m_instance)
         m_instance->willInvalidateRuntimeObject();
     m_instance = 0;
 }

 JSValue RuntimeObject::fallbackObjectGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
 {
     RuntimeObject* thisObj = static_cast<RuntimeObject*>(asObject(slotBase));
     RefPtr<Instance> instance = thisObj->m_instance;

     if (!instance)
         return throwInvalidAccessError(exec);

     instance->begin();

     Class *aClass = instance->getClass();
     JSValue result = aClass->fallbackObject(exec, instance.get(), propertyName);

     instance->end();

     return result;
 }

 JSValue RuntimeObject::fieldGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
 {
     RuntimeObject* thisObj = static_cast<RuntimeObject*>(asObject(slotBase));
     RefPtr<Instance> instance = thisObj->m_instance;

     if (!instance)
         return throwInvalidAccessError(exec);

     instance->begin();

     Class *aClass = instance->getClass();
     Field* aField = aClass->fieldNamed(propertyName, instance.get());
     JSValue result = aField->valueFromInstance(exec, instance.get());

     instance->end();

     return result;
 }

 JSValue RuntimeObject::methodGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
 {
     RuntimeObject* thisObj = static_cast<RuntimeObject*>(asObject(slotBase));
     RefPtr<Instance> instance = thisObj->m_instance;

     if (!instance)
         return throwInvalidAccessError(exec);

     instance->begin();

     JSValue method = instance->getMethod(exec, propertyName);

     instance->end();

     return method;
 }

 bool RuntimeObject::getOwnPropertySlot(ExecState *exec, const Identifier& propertyName, PropertySlot& slot)
 {
     if (!m_instance) {
         throwInvalidAccessError(exec);
         return false;
     }

     RefPtr<Instance> instance = m_instance;

     instance->begin();

     Class *aClass = instance->getClass();

     if (aClass) {
         // See if the instance has a field with the specified name.
         Field *aField = aClass->fieldNamed(propertyName, instance.get());
         if (aField) {
             slot.setCustom(this, fieldGetter);
             instance->end();
             return true;
         } else {
             // Now check if a method with specified name exists, if so return a function object for
             // that method.
             MethodList methodList = aClass->methodsNamed(propertyName, instance.get());
             if (methodList.size() > 0) {
                 slot.setCustom(this, methodGetter);

                 instance->end();
                 return true;
             }
         }

         // Try a fallback object.
         if (!aClass->fallbackObject(exec, instance.get(), propertyName).isUndefined()) {
             slot.setCustom(this, fallbackObjectGetter);
             instance->end();
             return true;
         }
     }

     instance->end();

     return instance->getOwnPropertySlot(this, exec, propertyName, slot);
 }

 bool RuntimeObject::getOwnPropertyDescriptor(ExecState *exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
 {
     if (!m_instance) {
         throwInvalidAccessError(exec);
         return false;
     }

     RefPtr<Instance> instance = m_instance;
     instance->begin();

     Class *aClass = instance->getClass();

     if (aClass) {
         // See if the instance has a field with the specified name.
         Field *aField = aClass->fieldNamed(propertyName, instance.get());
         if (aField) {
             PropertySlot slot;
             slot.setCustom(this, fieldGetter);
             instance->end();
             descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete);
             return true;
         } else {
             // Now check if a method with specified name exists, if so return a function object for
             // that method.
             MethodList methodList = aClass->methodsNamed(propertyName, instance.get());
             if (methodList.size() > 0) {
                 PropertySlot slot;
                 slot.setCustom(this, methodGetter);
                 instance->end();
                 descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete | ReadOnly);
                 return true;
             }
         }

         // Try a fallback object.
         if (!aClass->fallbackObject(exec, instance.get(), propertyName).isUndefined()) {
             PropertySlot slot;
             slot.setCustom(this, fallbackObjectGetter);
             instance->end();
             descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete | ReadOnly | DontEnum);
             return true;
         }
     }

     instance->end();

     return instance->getOwnPropertyDescriptor(this, exec, propertyName, descriptor);
 }

 void RuntimeObject::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
 {
     if (!m_instance) {
         throwInvalidAccessError(exec);
         return;
     }

     RefPtr<Instance> instance = m_instance;
     instance->begin();

     // Set the value of the property.
     Field *aField = instance->getClass()->fieldNamed(propertyName, instance.get());
     if (aField)
         aField->setValueToInstance(exec, instance.get(), value);
     else if (!instance->setValueOfUndefinedField(exec, propertyName, value))
         instance->put(this, exec, propertyName, value, slot);

     instance->end();
 }

 bool RuntimeObject::deleteProperty(ExecState*, const Identifier&)
 {
     // Can never remove a property of a RuntimeObject.
     return false;
 }

 JSValue RuntimeObject::defaultValue(ExecState* exec, PreferredPrimitiveType hint) const
 {
     if (!m_instance)
         return throwInvalidAccessError(exec);

     RefPtr<Instance> instance = m_instance;

     instance->begin();
     JSValue result = instance->defaultValue(exec, hint);
     instance->end();
     return result;
 }

 static JSValue JSC_HOST_CALL callRuntimeObject(ExecState* exec, JSObject* function, JSValue, const ArgList& args)
 {
     ASSERT(function->inherits(&RuntimeObject::s_info));
     RefPtr<Instance> instance(static_cast<RuntimeObject*>(function)->getInternalInstance());
     instance->begin();
     JSValue result = instance->invokeDefaultMethod(exec, args);
     instance->end();
     return result;
 }

 CallType RuntimeObject::getCallData(CallData& callData)
 {
     if (!m_instance)
         return CallTypeNone;

     RefPtr<Instance> instance = m_instance;
     if (!instance->supportsInvokeDefaultMethod())
         return CallTypeNone;

     callData.native.function = callRuntimeObject;
     return CallTypeHost;
 }

 static JSObject* callRuntimeConstructor(ExecState* exec, JSObject* constructor, const ArgList& args)
 {
     ASSERT(constructor->inherits(&RuntimeObject::s_info));
     RefPtr<Instance> instance(static_cast<RuntimeObject*>(constructor)->getInternalInstance());
     instance->begin();
     JSValue result = instance->invokeConstruct(exec, args);
     instance->end();

     ASSERT(result);
     return result.isObject() ? static_cast<JSObject*>(result.asCell()) : constructor;
 }

 ConstructType RuntimeObject::getConstructData(ConstructData& constructData)
 {
     if (!m_instance)
         return ConstructTypeNone;

     RefPtr<Instance> instance = m_instance;
     if (!instance->supportsConstruct())
         return ConstructTypeNone;

     constructData.native.function = callRuntimeConstructor;
     return ConstructTypeHost;
 }

 void RuntimeObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode)
 {
     if (!m_instance) {
         throwInvalidAccessError(exec);
         return;
     }

     RefPtr<Instance> instance = m_instance;

     instance->begin();
     instance->getPropertyNames(exec, propertyNames);
     instance->end();
 }

 JSObject* RuntimeObject::throwInvalidAccessError(ExecState* exec)
 {
     return throwError(exec, ReferenceError, "Trying to access object from destroyed plug-in.");
 }

 }
 }
	/*
	* Copyright (C) 2003, 2008, 2009 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 "runtime_object.h"

	#include "JSDOMBinding.h"
	#include "runtime_method.h"
	#include <runtime/Error.h>
	#include <runtime/ObjectPrototype.h>

	using namespace WebCore;

	namespace JSC {
	namespace Bindings {

	const ClassInfo RuntimeObject::s_info = { "RuntimeObject", 0, 0, 0 };

	RuntimeObject::RuntimeObject(ExecState* exec, PassRefPtr<Instance> instance)
	// FIXME: deprecatedGetDOMStructure uses the prototype off of the wrong global object
	// We need to pass in the right global object for "i".
	: JSObject(deprecatedGetDOMStructure<RuntimeObject>(exec))
	, m_instance(instance)
	{
	}

	RuntimeObject::RuntimeObject(ExecState*, NonNullPassRefPtr<Structure> structure, PassRefPtr<Instance> instance)
	: JSObject(structure)
	, m_instance(instance)
	{
	}

	RuntimeObject::~RuntimeObject()
	{
	if (m_instance)
	m_instance->willDestroyRuntimeObject();
	}

	void RuntimeObject::invalidate()
	{
	ASSERT(m_instance);
	if (m_instance)
	m_instance->willInvalidateRuntimeObject();
	m_instance = 0;
	}

	JSValue RuntimeObject::fallbackObjectGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
	{
	RuntimeObject* thisObj = static_cast<RuntimeObject*>(asObject(slotBase));
	RefPtr<Instance> instance = thisObj->m_instance;

	if (!instance)
	return throwInvalidAccessError(exec);

	instance->begin();

	Class *aClass = instance->getClass();
	JSValue result = aClass->fallbackObject(exec, instance.get(), propertyName);

	instance->end();

	return result;
	}

	JSValue RuntimeObject::fieldGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
	{
	RuntimeObject* thisObj = static_cast<RuntimeObject*>(asObject(slotBase));
	RefPtr<Instance> instance = thisObj->m_instance;

	if (!instance)
	return throwInvalidAccessError(exec);

	instance->begin();

	Class *aClass = instance->getClass();
	Field* aField = aClass->fieldNamed(propertyName, instance.get());
	JSValue result = aField->valueFromInstance(exec, instance.get());

	instance->end();

	return result;
	}

	JSValue RuntimeObject::methodGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
	{
	RuntimeObject* thisObj = static_cast<RuntimeObject*>(asObject(slotBase));
	RefPtr<Instance> instance = thisObj->m_instance;

	if (!instance)
	return throwInvalidAccessError(exec);

	instance->begin();

	JSValue method = instance->getMethod(exec, propertyName);

	instance->end();

	return method;
	}

	bool RuntimeObject::getOwnPropertySlot(ExecState *exec, const Identifier& propertyName, PropertySlot& slot)
	{
	if (!m_instance) {
	throwInvalidAccessError(exec);
	return false;
	}

	RefPtr<Instance> instance = m_instance;

	instance->begin();

	Class *aClass = instance->getClass();

	if (aClass) {
	// See if the instance has a field with the specified name.
	Field *aField = aClass->fieldNamed(propertyName, instance.get());
	if (aField) {
	slot.setCustom(this, fieldGetter);
	instance->end();
	return true;
	} else {
	// Now check if a method with specified name exists, if so return a function object for
	// that method.
	MethodList methodList = aClass->methodsNamed(propertyName, instance.get());
	if (methodList.size() > 0) {
	slot.setCustom(this, methodGetter);

	instance->end();
	return true;
	}
	}

	// Try a fallback object.
	if (!aClass->fallbackObject(exec, instance.get(), propertyName).isUndefined()) {
	slot.setCustom(this, fallbackObjectGetter);
	instance->end();
	return true;
	}
	}

	instance->end();

	return instance->getOwnPropertySlot(this, exec, propertyName, slot);
	}

	bool RuntimeObject::getOwnPropertyDescriptor(ExecState *exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
	{
	if (!m_instance) {
	throwInvalidAccessError(exec);
	return false;
	}

	RefPtr<Instance> instance = m_instance;
	instance->begin();

	Class *aClass = instance->getClass();

	if (aClass) {
	// See if the instance has a field with the specified name.
	Field *aField = aClass->fieldNamed(propertyName, instance.get());
	if (aField) {
	PropertySlot slot;
	slot.setCustom(this, fieldGetter);
	instance->end();
	descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete);
	return true;
	} else {
	// Now check if a method with specified name exists, if so return a function object for
	// that method.
	MethodList methodList = aClass->methodsNamed(propertyName, instance.get());
	if (methodList.size() > 0) {
	PropertySlot slot;
	slot.setCustom(this, methodGetter);
	instance->end();
	descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete \| ReadOnly);
	return true;
	}
	}

	// Try a fallback object.
	if (!aClass->fallbackObject(exec, instance.get(), propertyName).isUndefined()) {
	PropertySlot slot;
	slot.setCustom(this, fallbackObjectGetter);
	instance->end();
	descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete \| ReadOnly \| DontEnum);
	return true;
	}
	}

	instance->end();

	return instance->getOwnPropertyDescriptor(this, exec, propertyName, descriptor);
	}

	void RuntimeObject::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
	{
	if (!m_instance) {
	throwInvalidAccessError(exec);
	return;
	}

	RefPtr<Instance> instance = m_instance;
	instance->begin();

	// Set the value of the property.
	Field *aField = instance->getClass()->fieldNamed(propertyName, instance.get());
	if (aField)
	aField->setValueToInstance(exec, instance.get(), value);
	else if (!instance->setValueOfUndefinedField(exec, propertyName, value))
	instance->put(this, exec, propertyName, value, slot);

	instance->end();
	}

	bool RuntimeObject::deleteProperty(ExecState*, const Identifier&)
	{
	// Can never remove a property of a RuntimeObject.
	return false;
	}

	JSValue RuntimeObject::defaultValue(ExecState* exec, PreferredPrimitiveType hint) const
	{
	if (!m_instance)
	return throwInvalidAccessError(exec);

	RefPtr<Instance> instance = m_instance;

	instance->begin();
	JSValue result = instance->defaultValue(exec, hint);
	instance->end();
	return result;
	}

	static JSValue JSC_HOST_CALL callRuntimeObject(ExecState* exec, JSObject* function, JSValue, const ArgList& args)
	{
	ASSERT(function->inherits(&RuntimeObject::s_info));
	RefPtr<Instance> instance(static_cast<RuntimeObject*>(function)->getInternalInstance());
	instance->begin();
	JSValue result = instance->invokeDefaultMethod(exec, args);
	instance->end();
	return result;
	}

	CallType RuntimeObject::getCallData(CallData& callData)
	{
	if (!m_instance)
	return CallTypeNone;

	RefPtr<Instance> instance = m_instance;
	if (!instance->supportsInvokeDefaultMethod())
	return CallTypeNone;

	callData.native.function = callRuntimeObject;
	return CallTypeHost;
	}

	static JSObject* callRuntimeConstructor(ExecState* exec, JSObject* constructor, const ArgList& args)
	{
	ASSERT(constructor->inherits(&RuntimeObject::s_info));
	RefPtr<Instance> instance(static_cast<RuntimeObject*>(constructor)->getInternalInstance());
	instance->begin();
	JSValue result = instance->invokeConstruct(exec, args);
	instance->end();

	ASSERT(result);
	return result.isObject() ? static_cast<JSObject*>(result.asCell()) : constructor;
	}

	ConstructType RuntimeObject::getConstructData(ConstructData& constructData)
	{
	if (!m_instance)
	return ConstructTypeNone;

	RefPtr<Instance> instance = m_instance;
	if (!instance->supportsConstruct())
	return ConstructTypeNone;

	constructData.native.function = callRuntimeConstructor;
	return ConstructTypeHost;
	}

	void RuntimeObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode)
	{
	if (!m_instance) {
	throwInvalidAccessError(exec);
	return;
	}

	RefPtr<Instance> instance = m_instance;

	instance->begin();
	instance->getPropertyNames(exec, propertyNames);
	instance->end();
	}

	JSObject* RuntimeObject::throwInvalidAccessError(ExecState* exec)
	{
	return throwError(exec, ReferenceError, "Trying to access object from destroyed plug-in.");
	}

	}
	}