/*
* 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", &JSObjectWithGlobalObject::s_info, 0, 0 };
RuntimeObject::RuntimeObject(ExecState*, JSGlobalObject* globalObject, Structure* structure, PassRefPtr<Instance> instance)
: JSObjectWithGlobalObject(globalObject, structure)
, m_instance(instance)
{
ASSERT(inherits(&s_info));
}
RuntimeObject::~RuntimeObject()
{
}
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 EncodedJSValue JSC_HOST_CALL callRuntimeObject(ExecState* exec)
{
ASSERT(exec->callee()->inherits(&RuntimeObject::s_info));
RefPtr<Instance> instance(static_cast<RuntimeObject*>(exec->callee())->getInternalInstance());
instance->begin();
JSValue result = instance->invokeDefaultMethod(exec);
instance->end();
return JSValue::encode(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 EncodedJSValue JSC_HOST_CALL callRuntimeConstructor(ExecState* exec)
{
JSObject* constructor = exec->callee();
ASSERT(constructor->inherits(&RuntimeObject::s_info));
RefPtr<Instance> instance(static_cast<RuntimeObject*>(exec->callee())->getInternalInstance());
instance->begin();
ArgList args(exec);
JSValue result = instance->invokeConstruct(exec, args);
instance->end();
ASSERT(result);
return JSValue::encode(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, createReferenceError(exec, "Trying to access object from destroyed plug-in."));
}
}
}