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/*
* Copyright (C) 2003, 2008-2009, 2016 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 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 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 <JavaScriptCore/Error.h>
using namespace WebCore;
namespace JSC {
namespace Bindings {
WEBCORE_EXPORT const ClassInfo RuntimeObject::s_info = { "RuntimeObject", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(RuntimeObject) };
RuntimeObject::RuntimeObject(VM& vm, Structure* structure, RefPtr<Instance>&& instance)
: JSDestructibleObject(vm, structure)
, m_instance(WTFMove(instance))
{
}
void RuntimeObject::finishCreation(VM& vm)
{
Base::finishCreation(vm);
ASSERT(inherits(vm, info()));
}
void RuntimeObject::destroy(JSCell* cell)
{
static_cast<RuntimeObject*>(cell)->RuntimeObject::~RuntimeObject();
}
void RuntimeObject::invalidate()
{
ASSERT(m_instance);
if (m_instance)
m_instance->willInvalidateRuntimeObject();
m_instance = nullptr;
}
EncodedJSValue RuntimeObject::fallbackObjectGetter(ExecState* exec, EncodedJSValue thisValue, PropertyName propertyName)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
RuntimeObject* thisObj = jsCast<RuntimeObject*>(JSValue::decode(thisValue));
RefPtr<Instance> instance = thisObj->m_instance;
if (!instance)
return JSValue::encode(throwInvalidAccessError(exec, scope));
instance->begin();
Class *aClass = instance->getClass();
JSValue result = aClass->fallbackObject(exec, instance.get(), propertyName);
instance->end();
return JSValue::encode(result);
}
EncodedJSValue RuntimeObject::fieldGetter(ExecState* exec, EncodedJSValue thisValue, PropertyName propertyName)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
RuntimeObject* thisObj = jsCast<RuntimeObject*>(JSValue::decode(thisValue));
RefPtr<Instance> instance = thisObj->m_instance;
if (!instance)
return JSValue::encode(throwInvalidAccessError(exec, scope));
instance->begin();
Class *aClass = instance->getClass();
Field* aField = aClass->fieldNamed(propertyName, instance.get());
JSValue result = aField->valueFromInstance(exec, instance.get());
instance->end();
return JSValue::encode(result);
}
EncodedJSValue RuntimeObject::methodGetter(ExecState* exec, EncodedJSValue thisValue, PropertyName propertyName)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
RuntimeObject* thisObj = jsCast<RuntimeObject*>(JSValue::decode(thisValue));
RefPtr<Instance> instance = thisObj->m_instance;
if (!instance)
return JSValue::encode(throwInvalidAccessError(exec, scope));
instance->begin();
JSValue method = instance->getMethod(exec, propertyName);
instance->end();
return JSValue::encode(method);
}
bool RuntimeObject::getOwnPropertySlot(JSObject* object, ExecState *exec, PropertyName propertyName, PropertySlot& slot)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
RuntimeObject* thisObject = jsCast<RuntimeObject*>(object);
if (!thisObject->m_instance) {
throwInvalidAccessError(exec, scope);
return false;
}
RefPtr<Instance> instance = thisObject->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(thisObject, static_cast<unsigned>(JSC::PropertyAttribute::DontDelete), thisObject->fieldGetter);
instance->end();
return true;
} else {
// Now check if a method with specified name exists, if so return a function object for
// that method.
if (aClass->methodNamed(propertyName, instance.get())) {
slot.setCustom(thisObject, PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly, thisObject->methodGetter);
instance->end();
return true;
}
}
// Try a fallback object.
if (!aClass->fallbackObject(exec, instance.get(), propertyName).isUndefined()) {
slot.setCustom(thisObject, PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum, thisObject->fallbackObjectGetter);
instance->end();
return true;
}
}
instance->end();
return instance->getOwnPropertySlot(thisObject, exec, propertyName, slot);
}
bool RuntimeObject::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
RuntimeObject* thisObject = jsCast<RuntimeObject*>(cell);
if (!thisObject->m_instance) {
throwInvalidAccessError(exec, scope);
return false;
}
RefPtr<Instance> instance = thisObject->m_instance;
instance->begin();
// Set the value of the property.
bool result = false;
Field *aField = instance->getClass()->fieldNamed(propertyName, instance.get());
if (aField)
result = aField->setValueToInstance(exec, instance.get(), value);
else if (!instance->setValueOfUndefinedField(exec, propertyName, value))
result = instance->put(thisObject, exec, propertyName, value, slot);
instance->end();
return result;
}
bool RuntimeObject::deleteProperty(JSCell*, ExecState*, PropertyName)
{
// Can never remove a property of a RuntimeObject.
return false;
}
JSValue RuntimeObject::defaultValue(const JSObject* object, ExecState* exec, PreferredPrimitiveType hint)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
const RuntimeObject* thisObject = jsCast<const RuntimeObject*>(object);
if (!thisObject->m_instance)
return throwInvalidAccessError(exec, scope);
RefPtr<Instance> instance = thisObject->m_instance;
instance->begin();
JSValue result = instance->defaultValue(exec, hint);
instance->end();
return result;
}
static EncodedJSValue JSC_HOST_CALL callRuntimeObject(ExecState* exec)
{
ASSERT(exec->jsCallee()->inherits<RuntimeObject>(exec->vm()));
RefPtr<Instance> instance(static_cast<RuntimeObject*>(exec->jsCallee())->getInternalInstance());
instance->begin();
JSValue result = instance->invokeDefaultMethod(exec);
instance->end();
return JSValue::encode(result);
}
CallType RuntimeObject::getCallData(JSCell* cell, CallData& callData)
{
RuntimeObject* thisObject = jsCast<RuntimeObject*>(cell);
if (!thisObject->m_instance)
return CallType::None;
RefPtr<Instance> instance = thisObject->m_instance;
if (!instance->supportsInvokeDefaultMethod())
return CallType::None;
callData.native.function = callRuntimeObject;
return CallType::Host;
}
static EncodedJSValue JSC_HOST_CALL callRuntimeConstructor(ExecState* exec)
{
JSObject* constructor = exec->jsCallee();
ASSERT(constructor->inherits<RuntimeObject>(exec->vm()));
RefPtr<Instance> instance(static_cast<RuntimeObject*>(exec->jsCallee())->getInternalInstance());
instance->begin();
ArgList args(exec);
JSValue result = instance->invokeConstruct(exec, args);
instance->end();
ASSERT(result);
return JSValue::encode(result.isObject() ? jsCast<JSObject*>(result.asCell()) : constructor);
}
ConstructType RuntimeObject::getConstructData(JSCell* cell, ConstructData& constructData)
{
RuntimeObject* thisObject = jsCast<RuntimeObject*>(cell);
if (!thisObject->m_instance)
return ConstructType::None;
RefPtr<Instance> instance = thisObject->m_instance;
if (!instance->supportsConstruct())
return ConstructType::None;
constructData.native.function = callRuntimeConstructor;
return ConstructType::Host;
}
void RuntimeObject::getOwnPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
RuntimeObject* thisObject = jsCast<RuntimeObject*>(object);
if (!thisObject->m_instance) {
throwInvalidAccessError(exec, scope);
return;
}
RefPtr<Instance> instance = thisObject->m_instance;
instance->begin();
instance->getPropertyNames(exec, propertyNames);
instance->end();
}
Exception* RuntimeObject::throwInvalidAccessError(ExecState* exec, ThrowScope& scope)
{
return throwException(exec, scope, createReferenceError(exec, "Trying to access object from destroyed plug-in."));
}
}
}