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/*
* Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
*
* 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 "APIShims.h"
#include "APICast.h"
#include "Error.h"
#include "ExceptionHelpers.h"
#include "JSCallbackFunction.h"
#include "JSClassRef.h"
#include "JSFunction.h"
#include "JSGlobalObject.h"
#include "JSLock.h"
#include "JSObjectRef.h"
#include "JSString.h"
#include "JSStringRef.h"
#include "OpaqueJSString.h"
#include "PropertyNameArray.h"
#include <wtf/Vector.h>
namespace JSC {
template <class Base>
inline JSCallbackObject<Base>* JSCallbackObject<Base>::asCallbackObject(JSValue value)
{
ASSERT(asObject(value)->inherits(&s_info));
return static_cast<JSCallbackObject*>(asObject(value));
}
template <class Base>
JSCallbackObject<Base>::JSCallbackObject(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, JSClassRef jsClass, void* data)
: Base(globalObject, structure)
, m_callbackObjectData(adoptPtr(new JSCallbackObjectData(data, jsClass)))
{
ASSERT(Base::inherits(&s_info));
init(exec);
}
// Global object constructor.
// FIXME: Move this into a separate JSGlobalCallbackObject class derived from this one.
template <class Base>
JSCallbackObject<Base>::JSCallbackObject(JSGlobalData& globalData, JSClassRef jsClass, Structure* structure)
: Base(globalData, structure)
, m_callbackObjectData(adoptPtr(new JSCallbackObjectData(0, jsClass)))
{
ASSERT(Base::inherits(&s_info));
ASSERT(Base::isGlobalObject());
init(static_cast<JSGlobalObject*>(this)->globalExec());
}
template <class Base>
void JSCallbackObject<Base>::init(ExecState* exec)
{
ASSERT(exec);
Vector<JSObjectInitializeCallback, 16> initRoutines;
JSClassRef jsClass = classRef();
do {
if (JSObjectInitializeCallback initialize = jsClass->initialize)
initRoutines.append(initialize);
} while ((jsClass = jsClass->parentClass));
// initialize from base to derived
for (int i = static_cast<int>(initRoutines.size()) - 1; i >= 0; i--) {
APICallbackShim callbackShim(exec);
JSObjectInitializeCallback initialize = initRoutines[i];
initialize(toRef(exec), toRef(this));
}
bool needsFinalizer = false;
for (JSClassRef jsClassPtr = classRef(); jsClassPtr && !needsFinalizer; jsClassPtr = jsClassPtr->parentClass)
needsFinalizer = jsClassPtr->finalize;
if (needsFinalizer) {
HandleSlot slot = exec->globalData().allocateGlobalHandle();
HandleHeap::heapFor(slot)->makeWeak(slot, m_callbackObjectData.get(), classRef());
HandleHeap::heapFor(slot)->writeBarrier(slot, this);
*slot = this;
}
}
template <class Base>
UString JSCallbackObject<Base>::className() const
{
UString thisClassName = classRef()->className();
if (!thisClassName.isEmpty())
return thisClassName;
return Base::className();
}
template <class Base>
bool JSCallbackObject<Base>::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
{
JSContextRef ctx = toRef(exec);
JSObjectRef thisRef = toRef(this);
RefPtr<OpaqueJSString> propertyNameRef;
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
// optional optimization to bypass getProperty in cases when we only need to know if the property exists
if (JSObjectHasPropertyCallback hasProperty = jsClass->hasProperty) {
if (!propertyNameRef)
propertyNameRef = OpaqueJSString::create(propertyName.ustring());
APICallbackShim callbackShim(exec);
if (hasProperty(ctx, thisRef, propertyNameRef.get())) {
slot.setCustom(this, callbackGetter);
return true;
}
} else if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
if (!propertyNameRef)
propertyNameRef = OpaqueJSString::create(propertyName.ustring());
JSValueRef exception = 0;
JSValueRef value;
{
APICallbackShim callbackShim(exec);
value = getProperty(ctx, thisRef, propertyNameRef.get(), &exception);
}
if (exception) {
throwError(exec, toJS(exec, exception));
slot.setValue(jsUndefined());
return true;
}
if (value) {
slot.setValue(toJS(exec, value));
return true;
}
}
if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
if (staticValues->contains(propertyName.impl())) {
JSValue value = getStaticValue(exec, propertyName);
if (value) {
slot.setValue(value);
return true;
}
}
}
if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
if (staticFunctions->contains(propertyName.impl())) {
slot.setCustom(this, staticFunctionGetter);
return true;
}
}
}
return Base::getOwnPropertySlot(exec, propertyName, slot);
}
template <class Base>
bool JSCallbackObject<Base>::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
{
PropertySlot slot;
if (getOwnPropertySlot(exec, propertyName, slot)) {
// Ideally we should return an access descriptor, but returning a value descriptor is better than nothing.
JSValue value = slot.getValue(exec, propertyName);
if (!exec->hadException())
descriptor.setValue(value);
// We don't know whether the property is configurable, but assume it is.
descriptor.setConfigurable(true);
// We don't know whether the property is enumerable (we could call getOwnPropertyNames() to find out), but assume it isn't.
descriptor.setEnumerable(false);
return true;
}
return Base::getOwnPropertyDescriptor(exec, propertyName, descriptor);
}
template <class Base>
void JSCallbackObject<Base>::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
{
JSContextRef ctx = toRef(exec);
JSObjectRef thisRef = toRef(this);
RefPtr<OpaqueJSString> propertyNameRef;
JSValueRef valueRef = toRef(exec, value);
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectSetPropertyCallback setProperty = jsClass->setProperty) {
if (!propertyNameRef)
propertyNameRef = OpaqueJSString::create(propertyName.ustring());
JSValueRef exception = 0;
bool result;
{
APICallbackShim callbackShim(exec);
result = setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, &exception);
}
if (exception)
throwError(exec, toJS(exec, exception));
if (result || exception)
return;
}
if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
if (StaticValueEntry* entry = staticValues->get(propertyName.impl())) {
if (entry->attributes & kJSPropertyAttributeReadOnly)
return;
if (JSObjectSetPropertyCallback setProperty = entry->setProperty) {
if (!propertyNameRef)
propertyNameRef = OpaqueJSString::create(propertyName.ustring());
JSValueRef exception = 0;
bool result;
{
APICallbackShim callbackShim(exec);
result = setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, &exception);
}
if (exception)
throwError(exec, toJS(exec, exception));
if (result || exception)
return;
}
}
}
if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.impl())) {
if (entry->attributes & kJSPropertyAttributeReadOnly)
return;
JSCallbackObject<Base>::putDirect(exec->globalData(), propertyName, value); // put as override property
return;
}
}
}
return Base::put(exec, propertyName, value, slot);
}
template <class Base>
bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, const Identifier& propertyName)
{
JSContextRef ctx = toRef(exec);
JSObjectRef thisRef = toRef(this);
RefPtr<OpaqueJSString> propertyNameRef;
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectDeletePropertyCallback deleteProperty = jsClass->deleteProperty) {
if (!propertyNameRef)
propertyNameRef = OpaqueJSString::create(propertyName.ustring());
JSValueRef exception = 0;
bool result;
{
APICallbackShim callbackShim(exec);
result = deleteProperty(ctx, thisRef, propertyNameRef.get(), &exception);
}
if (exception)
throwError(exec, toJS(exec, exception));
if (result || exception)
return true;
}
if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
if (StaticValueEntry* entry = staticValues->get(propertyName.impl())) {
if (entry->attributes & kJSPropertyAttributeDontDelete)
return false;
return true;
}
}
if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.impl())) {
if (entry->attributes & kJSPropertyAttributeDontDelete)
return false;
return true;
}
}
}
return Base::deleteProperty(exec, propertyName);
}
template <class Base>
bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, unsigned propertyName)
{
return deleteProperty(exec, Identifier::from(exec, propertyName));
}
template <class Base>
ConstructType JSCallbackObject<Base>::getConstructData(ConstructData& constructData)
{
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
if (jsClass->callAsConstructor) {
constructData.native.function = construct;
return ConstructTypeHost;
}
}
return ConstructTypeNone;
}
template <class Base>
EncodedJSValue JSCallbackObject<Base>::construct(ExecState* exec)
{
JSObject* constructor = exec->callee();
JSContextRef execRef = toRef(exec);
JSObjectRef constructorRef = toRef(constructor);
for (JSClassRef jsClass = static_cast<JSCallbackObject<Base>*>(constructor)->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectCallAsConstructorCallback callAsConstructor = jsClass->callAsConstructor) {
int argumentCount = static_cast<int>(exec->argumentCount());
Vector<JSValueRef, 16> arguments(argumentCount);
for (int i = 0; i < argumentCount; i++)
arguments[i] = toRef(exec, exec->argument(i));
JSValueRef exception = 0;
JSObject* result;
{
APICallbackShim callbackShim(exec);
result = toJS(callAsConstructor(execRef, constructorRef, argumentCount, arguments.data(), &exception));
}
if (exception)
throwError(exec, toJS(exec, exception));
return JSValue::encode(result);
}
}
ASSERT_NOT_REACHED(); // getConstructData should prevent us from reaching here
return JSValue::encode(JSValue());
}
template <class Base>
bool JSCallbackObject<Base>::hasInstance(ExecState* exec, JSValue value, JSValue)
{
JSContextRef execRef = toRef(exec);
JSObjectRef thisRef = toRef(this);
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectHasInstanceCallback hasInstance = jsClass->hasInstance) {
JSValueRef valueRef = toRef(exec, value);
JSValueRef exception = 0;
bool result;
{
APICallbackShim callbackShim(exec);
result = hasInstance(execRef, thisRef, valueRef, &exception);
}
if (exception)
throwError(exec, toJS(exec, exception));
return result;
}
}
return false;
}
template <class Base>
CallType JSCallbackObject<Base>::getCallData(CallData& callData)
{
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
if (jsClass->callAsFunction) {
callData.native.function = call;
return CallTypeHost;
}
}
return CallTypeNone;
}
template <class Base>
EncodedJSValue JSCallbackObject<Base>::call(ExecState* exec)
{
JSContextRef execRef = toRef(exec);
JSObjectRef functionRef = toRef(exec->callee());
JSObjectRef thisObjRef = toRef(exec->hostThisValue().toThisObject(exec));
for (JSClassRef jsClass = static_cast<JSCallbackObject<Base>*>(toJS(functionRef))->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectCallAsFunctionCallback callAsFunction = jsClass->callAsFunction) {
int argumentCount = static_cast<int>(exec->argumentCount());
Vector<JSValueRef, 16> arguments(argumentCount);
for (int i = 0; i < argumentCount; i++)
arguments[i] = toRef(exec, exec->argument(i));
JSValueRef exception = 0;
JSValue result;
{
APICallbackShim callbackShim(exec);
result = toJS(exec, callAsFunction(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception));
}
if (exception)
throwError(exec, toJS(exec, exception));
return JSValue::encode(result);
}
}
ASSERT_NOT_REACHED(); // getCallData should prevent us from reaching here
return JSValue::encode(JSValue());
}
template <class Base>
void JSCallbackObject<Base>::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
JSContextRef execRef = toRef(exec);
JSObjectRef thisRef = toRef(this);
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectGetPropertyNamesCallback getPropertyNames = jsClass->getPropertyNames) {
APICallbackShim callbackShim(exec);
getPropertyNames(execRef, thisRef, toRef(&propertyNames));
}
if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
typedef OpaqueJSClassStaticValuesTable::const_iterator iterator;
iterator end = staticValues->end();
for (iterator it = staticValues->begin(); it != end; ++it) {
StringImpl* name = it->first.get();
StaticValueEntry* entry = it->second;
if (entry->getProperty && (!(entry->attributes & kJSPropertyAttributeDontEnum) || (mode == IncludeDontEnumProperties)))
propertyNames.add(Identifier(exec, name));
}
}
if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
typedef OpaqueJSClassStaticFunctionsTable::const_iterator iterator;
iterator end = staticFunctions->end();
for (iterator it = staticFunctions->begin(); it != end; ++it) {
StringImpl* name = it->first.get();
StaticFunctionEntry* entry = it->second;
if (!(entry->attributes & kJSPropertyAttributeDontEnum) || (mode == IncludeDontEnumProperties))
propertyNames.add(Identifier(exec, name));
}
}
}
Base::getOwnPropertyNames(exec, propertyNames, mode);
}
template <class Base>
double JSCallbackObject<Base>::toNumber(ExecState* exec) const
{
// We need this check to guard against the case where this object is rhs of
// a binary expression where lhs threw an exception in its conversion to
// primitive
if (exec->hadException())
return std::numeric_limits<double>::quiet_NaN();
JSContextRef ctx = toRef(exec);
JSObjectRef thisRef = toRef(this);
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass)
if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType) {
JSValueRef exception = 0;
JSValueRef value;
{
APICallbackShim callbackShim(exec);
value = convertToType(ctx, thisRef, kJSTypeNumber, &exception);
}
if (exception) {
throwError(exec, toJS(exec, exception));
return 0;
}
double dValue;
if (value)
return toJS(exec, value).getNumber(dValue) ? dValue : std::numeric_limits<double>::quiet_NaN();
}
return Base::toNumber(exec);
}
template <class Base>
UString JSCallbackObject<Base>::toString(ExecState* exec) const
{
JSContextRef ctx = toRef(exec);
JSObjectRef thisRef = toRef(this);
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass)
if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType) {
JSValueRef exception = 0;
JSValueRef value;
{
APICallbackShim callbackShim(exec);
value = convertToType(ctx, thisRef, kJSTypeString, &exception);
}
if (exception) {
throwError(exec, toJS(exec, exception));
return "";
}
if (value)
return toJS(exec, value).getString(exec);
}
return Base::toString(exec);
}
template <class Base>
void JSCallbackObject<Base>::setPrivate(void* data)
{
m_callbackObjectData->privateData = data;
}
template <class Base>
void* JSCallbackObject<Base>::getPrivate()
{
return m_callbackObjectData->privateData;
}
template <class Base>
bool JSCallbackObject<Base>::inherits(JSClassRef c) const
{
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass)
if (jsClass == c)
return true;
return false;
}
template <class Base>
JSValue JSCallbackObject<Base>::getStaticValue(ExecState* exec, const Identifier& propertyName)
{
JSObjectRef thisRef = toRef(this);
RefPtr<OpaqueJSString> propertyNameRef;
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass)
if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec))
if (StaticValueEntry* entry = staticValues->get(propertyName.impl()))
if (JSObjectGetPropertyCallback getProperty = entry->getProperty) {
if (!propertyNameRef)
propertyNameRef = OpaqueJSString::create(propertyName.ustring());
JSValueRef exception = 0;
JSValueRef value;
{
APICallbackShim callbackShim(exec);
value = getProperty(toRef(exec), thisRef, propertyNameRef.get(), &exception);
}
if (exception) {
throwError(exec, toJS(exec, exception));
return jsUndefined();
}
if (value)
return toJS(exec, value);
}
return JSValue();
}
template <class Base>
JSValue JSCallbackObject<Base>::staticFunctionGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
{
JSCallbackObject* thisObj = asCallbackObject(slotBase);
// Check for cached or override property.
PropertySlot slot2(thisObj);
if (thisObj->Base::getOwnPropertySlot(exec, propertyName, slot2))
return slot2.getValue(exec, propertyName);
for (JSClassRef jsClass = thisObj->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.impl())) {
if (JSObjectCallAsFunctionCallback callAsFunction = entry->callAsFunction) {
JSObject* o = new (exec) JSCallbackFunction(exec, asGlobalObject(thisObj->getAnonymousValue(0)), callAsFunction, propertyName);
thisObj->putDirect(exec->globalData(), propertyName, o, entry->attributes);
return o;
}
}
}
}
return throwError(exec, createReferenceError(exec, "Static function property defined with NULL callAsFunction callback."));
}
template <class Base>
JSValue JSCallbackObject<Base>::callbackGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
{
JSCallbackObject* thisObj = asCallbackObject(slotBase);
JSObjectRef thisRef = toRef(thisObj);
RefPtr<OpaqueJSString> propertyNameRef;
for (JSClassRef jsClass = thisObj->classRef(); jsClass; jsClass = jsClass->parentClass)
if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
if (!propertyNameRef)
propertyNameRef = OpaqueJSString::create(propertyName.ustring());
JSValueRef exception = 0;
JSValueRef value;
{
APICallbackShim callbackShim(exec);
value = getProperty(toRef(exec), thisRef, propertyNameRef.get(), &exception);
}
if (exception) {
throwError(exec, toJS(exec, exception));
return jsUndefined();
}
if (value)
return toJS(exec, value);
}
return throwError(exec, createReferenceError(exec, "hasProperty callback returned true for a property that doesn't exist."));
}
} // namespace JSC