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darling-JavaScriptCore/API/JSCallbackObjectFunctions.h

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/*
* Copyright (C) 2006-2020 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 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.
*/
#pragma once
#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 "OpaqueJSString.h"
#include "PropertyNameArray.h"
#include <wtf/Vector.h>
namespace JSC {
template <class Parent>
inline JSCallbackObject<Parent>* JSCallbackObject<Parent>::asCallbackObject(JSValue value)
{
ASSERT(asObject(value)->inherits(value.getObject()->vm(), info()));
return jsCast<JSCallbackObject*>(asObject(value));
}
template <class Parent>
inline JSCallbackObject<Parent>* JSCallbackObject<Parent>::asCallbackObject(EncodedJSValue encodedValue)
{
JSValue value = JSValue::decode(encodedValue);
ASSERT(asObject(value)->inherits(value.getObject()->vm(), info()));
return jsCast<JSCallbackObject*>(asObject(value));
}
template <class Parent>
JSCallbackObject<Parent>::JSCallbackObject(JSGlobalObject* globalObject, Structure* structure, JSClassRef jsClass, void* data)
: Parent(getVM(globalObject), structure)
, m_callbackObjectData(makeUnique<JSCallbackObjectData>(data, jsClass))
{
}
// Global object constructor.
// FIXME: Move this into a separate JSGlobalCallbackObject class derived from this one.
template <class Parent>
JSCallbackObject<Parent>::JSCallbackObject(VM& vm, JSClassRef jsClass, Structure* structure)
: Parent(vm, structure)
, m_callbackObjectData(makeUnique<JSCallbackObjectData>(nullptr, jsClass))
{
}
template <class Parent>
JSCallbackObject<Parent>::~JSCallbackObject()
{
VM& vm = this->HeapCell::vm();
vm.currentlyDestructingCallbackObject = this;
ASSERT(m_classInfo);
vm.currentlyDestructingCallbackObjectClassInfo = m_classInfo;
JSObjectRef thisRef = toRef(static_cast<JSObject*>(this));
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectFinalizeCallback finalize = jsClass->finalize)
finalize(thisRef);
}
vm.currentlyDestructingCallbackObject = nullptr;
vm.currentlyDestructingCallbackObjectClassInfo = nullptr;
}
template <class Parent>
void JSCallbackObject<Parent>::finishCreation(JSGlobalObject* globalObject)
{
VM& vm = getVM(globalObject);
Base::finishCreation(vm);
ASSERT(Parent::inherits(vm, info()));
init(globalObject);
}
// This is just for Global object, so we can assume that Base::finishCreation is JSGlobalObject::finishCreation.
template <class Parent>
void JSCallbackObject<Parent>::finishCreation(VM& vm)
{
ASSERT(Parent::inherits(vm, info()));
ASSERT(Parent::isGlobalObject());
Base::finishCreation(vm);
init(jsCast<JSGlobalObject*>(this));
}
template <class Parent>
void JSCallbackObject<Parent>::init(JSGlobalObject* globalObject)
{
ASSERT(globalObject);
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--) {
JSLock::DropAllLocks dropAllLocks(globalObject);
JSObjectInitializeCallback initialize = initRoutines[i];
initialize(toRef(globalObject), toRef(jsCast<JSObject*>(this)));
}
m_classInfo = this->classInfo(getVM(globalObject));
}
template <class Parent>
String JSCallbackObject<Parent>::className(const JSObject* object, VM& vm)
{
const JSCallbackObject* thisObject = jsCast<const JSCallbackObject*>(object);
String thisClassName = thisObject->classRef()->className();
if (!thisClassName.isEmpty())
return thisClassName;
return Parent::className(object, vm);
}
template <class Parent>
String JSCallbackObject<Parent>::toStringName(const JSObject* object, JSGlobalObject* globalObject)
{
VM& vm = getVM(globalObject);
const ClassInfo* info = object->classInfo(vm);
ASSERT(info);
return info->methodTable.className(object, vm);
}
template <class Parent>
bool JSCallbackObject<Parent>::getOwnPropertySlot(JSObject* object, JSGlobalObject* globalObject, PropertyName propertyName, PropertySlot& slot)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(object);
JSContextRef ctx = toRef(globalObject);
JSObjectRef thisRef = toRef(jsCast<JSObject*>(thisObject));
RefPtr<OpaqueJSString> propertyNameRef;
if (StringImpl* name = propertyName.uid()) {
unsigned attributes = PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum;
for (JSClassRef jsClass = thisObject->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::tryCreate(name);
JSLock::DropAllLocks dropAllLocks(globalObject);
if (hasProperty(ctx, thisRef, propertyNameRef.get())) {
slot.setCustom(thisObject, attributes, getCallbackGetter());
return true;
}
} else if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
if (!propertyNameRef)
propertyNameRef = OpaqueJSString::tryCreate(name);
JSValueRef exception = nullptr;
JSValueRef value;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
value = getProperty(ctx, thisRef, propertyNameRef.get(), &exception);
}
if (exception) {
throwException(globalObject, scope, toJS(globalObject, exception));
slot.setValue(thisObject, attributes, jsUndefined());
return true;
}
if (value) {
slot.setValue(thisObject, attributes, toJS(globalObject, value));
return true;
}
}
if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(globalObject)) {
if (staticValues->contains(name)) {
JSValue value = thisObject->getStaticValue(globalObject, propertyName);
RETURN_IF_EXCEPTION(scope, false);
if (value) {
slot.setValue(thisObject, attributes, value);
return true;
}
}
}
if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(globalObject)) {
if (staticFunctions->contains(name)) {
slot.setCustom(thisObject, attributes, getStaticFunctionGetter());
return true;
}
}
}
}
RELEASE_AND_RETURN(scope, Parent::getOwnPropertySlot(thisObject, globalObject, propertyName, slot));
}
template <class Parent>
bool JSCallbackObject<Parent>::getOwnPropertySlotByIndex(JSObject* object, JSGlobalObject* globalObject, unsigned propertyName, PropertySlot& slot)
{
VM& vm = getVM(globalObject);
return object->methodTable(vm)->getOwnPropertySlot(object, globalObject, Identifier::from(vm, propertyName), slot);
}
template <class Parent>
JSValue JSCallbackObject<Parent>::defaultValue(const JSObject* object, JSGlobalObject* globalObject, PreferredPrimitiveType hint)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
const JSCallbackObject* thisObject = jsCast<const JSCallbackObject*>(object);
JSContextRef ctx = toRef(globalObject);
JSObjectRef thisRef = toRef(jsCast<const JSObject*>(thisObject));
::JSType jsHint = hint == PreferString ? kJSTypeString : kJSTypeNumber;
for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType) {
JSValueRef exception = nullptr;
JSValueRef result = convertToType(ctx, thisRef, jsHint, &exception);
if (exception) {
throwException(globalObject, scope, toJS(globalObject, exception));
return jsUndefined();
}
if (result)
return toJS(globalObject, result);
}
}
RELEASE_AND_RETURN(scope, Parent::defaultValue(object, globalObject, hint));
}
template <class Parent>
bool JSCallbackObject<Parent>::put(JSCell* cell, JSGlobalObject* globalObject, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
JSContextRef ctx = toRef(globalObject);
JSObjectRef thisRef = toRef(jsCast<JSObject*>(thisObject));
RefPtr<OpaqueJSString> propertyNameRef;
JSValueRef valueRef = toRef(globalObject, value);
if (StringImpl* name = propertyName.uid()) {
for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectSetPropertyCallback setProperty = jsClass->setProperty) {
if (!propertyNameRef)
propertyNameRef = OpaqueJSString::tryCreate(name);
JSValueRef exception = nullptr;
bool result;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
result = setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, &exception);
}
if (exception)
throwException(globalObject, scope, toJS(globalObject, exception));
if (result || exception)
return result;
}
if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(globalObject)) {
if (StaticValueEntry* entry = staticValues->get(name)) {
if (entry->attributes & kJSPropertyAttributeReadOnly)
return false;
if (JSObjectSetPropertyCallback setProperty = entry->setProperty) {
JSValueRef exception = nullptr;
bool result;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
result = setProperty(ctx, thisRef, entry->propertyNameRef.get(), valueRef, &exception);
}
if (exception)
throwException(globalObject, scope, toJS(globalObject, exception));
if (result || exception)
return result;
}
}
}
if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(globalObject)) {
if (StaticFunctionEntry* entry = staticFunctions->get(name)) {
PropertySlot getSlot(thisObject, PropertySlot::InternalMethodType::VMInquiry, &vm);
bool found = Parent::getOwnPropertySlot(thisObject, globalObject, propertyName, getSlot);
RETURN_IF_EXCEPTION(scope, false);
getSlot.disallowVMEntry.reset();
if (found)
RELEASE_AND_RETURN(scope, Parent::put(thisObject, globalObject, propertyName, value, slot));
if (entry->attributes & kJSPropertyAttributeReadOnly)
return false;
return thisObject->JSCallbackObject<Parent>::putDirect(vm, propertyName, value); // put as override property
}
}
}
}
RELEASE_AND_RETURN(scope, Parent::put(thisObject, globalObject, propertyName, value, slot));
}
template <class Parent>
bool JSCallbackObject<Parent>::putByIndex(JSCell* cell, JSGlobalObject* globalObject, unsigned propertyIndex, JSValue value, bool shouldThrow)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
JSContextRef ctx = toRef(globalObject);
JSObjectRef thisRef = toRef(jsCast<JSObject*>(thisObject));
RefPtr<OpaqueJSString> propertyNameRef;
JSValueRef valueRef = toRef(globalObject, value);
Identifier propertyName = Identifier::from(vm, propertyIndex);
for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectSetPropertyCallback setProperty = jsClass->setProperty) {
if (!propertyNameRef)
propertyNameRef = OpaqueJSString::tryCreate(propertyName.impl());
JSValueRef exception = nullptr;
bool result;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
result = setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, &exception);
}
if (exception)
throwException(globalObject, scope, toJS(globalObject, exception));
if (result || exception)
return result;
}
if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(globalObject)) {
if (StaticValueEntry* entry = staticValues->get(propertyName.impl())) {
if (entry->attributes & kJSPropertyAttributeReadOnly)
return false;
if (JSObjectSetPropertyCallback setProperty = entry->setProperty) {
JSValueRef exception = nullptr;
bool result;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
result = setProperty(ctx, thisRef, entry->propertyNameRef.get(), valueRef, &exception);
}
if (exception)
throwException(globalObject, scope, toJS(globalObject, exception));
if (result || exception)
return result;
}
}
}
if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(globalObject)) {
if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.impl())) {
if (entry->attributes & kJSPropertyAttributeReadOnly)
return false;
break;
}
}
}
RELEASE_AND_RETURN(scope, Parent::putByIndex(thisObject, globalObject, propertyIndex, value, shouldThrow));
}
template <class Parent>
bool JSCallbackObject<Parent>::deleteProperty(JSCell* cell, JSGlobalObject* globalObject, PropertyName propertyName, DeletePropertySlot& slot)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
JSContextRef ctx = toRef(globalObject);
JSObjectRef thisRef = toRef(jsCast<JSObject*>(thisObject));
RefPtr<OpaqueJSString> propertyNameRef;
if (StringImpl* name = propertyName.uid()) {
for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectDeletePropertyCallback deleteProperty = jsClass->deleteProperty) {
if (!propertyNameRef)
propertyNameRef = OpaqueJSString::tryCreate(name);
JSValueRef exception = nullptr;
bool result;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
result = deleteProperty(ctx, thisRef, propertyNameRef.get(), &exception);
}
if (exception)
throwException(globalObject, scope, toJS(globalObject, exception));
if (result || exception)
return true;
}
if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(globalObject)) {
if (StaticValueEntry* entry = staticValues->get(name)) {
if (entry->attributes & kJSPropertyAttributeDontDelete)
return false;
return true;
}
}
if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(globalObject)) {
if (StaticFunctionEntry* entry = staticFunctions->get(name)) {
if (entry->attributes & kJSPropertyAttributeDontDelete)
return false;
return true;
}
}
}
}
static_assert(std::is_final_v<JSCallbackObject<Parent>>, "Ensure no derived classes have custom deletePropertyByIndex implementation");
if (Optional<uint32_t> index = parseIndex(propertyName))
RELEASE_AND_RETURN(scope, Parent::deletePropertyByIndex(thisObject, globalObject, index.value()));
RELEASE_AND_RETURN(scope, Parent::deleteProperty(thisObject, globalObject, propertyName, slot));
}
template <class Parent>
bool JSCallbackObject<Parent>::deletePropertyByIndex(JSCell* cell, JSGlobalObject* globalObject, unsigned propertyName)
{
VM& vm = getVM(globalObject);
JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
return JSCell::deleteProperty(thisObject, globalObject, Identifier::from(vm, propertyName));
}
template <class Parent>
CallData JSCallbackObject<Parent>::getConstructData(JSCell* cell)
{
CallData constructData;
JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (jsClass->callAsConstructor) {
constructData.type = CallData::Type::Native;
constructData.native.function = getConstructFunction();
break;
}
}
return constructData;
}
template <class Parent>
EncodedJSValue JSCallbackObject<Parent>::constructImpl(JSGlobalObject* globalObject, CallFrame* callFrame)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSObject* constructor = callFrame->jsCallee();
JSContextRef execRef = toRef(globalObject);
JSObjectRef constructorRef = toRef(constructor);
for (JSClassRef jsClass = jsCast<JSCallbackObject<Parent>*>(constructor)->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectCallAsConstructorCallback callAsConstructor = jsClass->callAsConstructor) {
size_t argumentCount = callFrame->argumentCount();
Vector<JSValueRef, 16> arguments;
arguments.reserveInitialCapacity(argumentCount);
for (size_t i = 0; i < argumentCount; ++i)
arguments.uncheckedAppend(toRef(globalObject, callFrame->uncheckedArgument(i)));
JSValueRef exception = nullptr;
JSObject* result;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
result = toJS(callAsConstructor(execRef, constructorRef, argumentCount, arguments.data(), &exception));
}
if (exception) {
throwException(globalObject, scope, toJS(globalObject, exception));
return JSValue::encode(jsUndefined());
}
return JSValue::encode(result);
}
}
RELEASE_ASSERT_NOT_REACHED(); // getConstructData should prevent us from reaching here
return JSValue::encode(JSValue());
}
template <class Parent>
bool JSCallbackObject<Parent>::customHasInstance(JSObject* object, JSGlobalObject* globalObject, JSValue value)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(object);
JSContextRef execRef = toRef(globalObject);
JSObjectRef thisRef = toRef(jsCast<JSObject*>(thisObject));
for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectHasInstanceCallback hasInstance = jsClass->hasInstance) {
JSValueRef valueRef = toRef(globalObject, value);
JSValueRef exception = nullptr;
bool result;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
result = hasInstance(execRef, thisRef, valueRef, &exception);
}
if (exception)
throwException(globalObject, scope, toJS(globalObject, exception));
return result;
}
}
return false;
}
template <class Parent>
CallData JSCallbackObject<Parent>::getCallData(JSCell* cell)
{
CallData callData;
JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (jsClass->callAsFunction) {
callData.type = CallData::Type::Native;
callData.native.function = getCallFunction();
break;
}
}
return callData;
}
template <class Parent>
EncodedJSValue JSCallbackObject<Parent>::callImpl(JSGlobalObject* globalObject, CallFrame* callFrame)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSContextRef execRef = toRef(globalObject);
JSObjectRef functionRef = toRef(callFrame->jsCallee());
JSObjectRef thisObjRef = toRef(jsCast<JSObject*>(callFrame->thisValue().toThis(globalObject, ECMAMode::sloppy())));
for (JSClassRef jsClass = jsCast<JSCallbackObject<Parent>*>(toJS(functionRef))->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectCallAsFunctionCallback callAsFunction = jsClass->callAsFunction) {
size_t argumentCount = callFrame->argumentCount();
Vector<JSValueRef, 16> arguments;
arguments.reserveInitialCapacity(argumentCount);
for (size_t i = 0; i < argumentCount; ++i)
arguments.uncheckedAppend(toRef(globalObject, callFrame->uncheckedArgument(i)));
JSValueRef exception = nullptr;
JSValue result;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
result = toJS(globalObject, callAsFunction(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception));
}
if (exception) {
throwException(globalObject, scope, toJS(globalObject, exception));
return JSValue::encode(jsUndefined());
}
return JSValue::encode(result);
}
}
RELEASE_ASSERT_NOT_REACHED(); // getCallData should prevent us from reaching here
return JSValue::encode(JSValue());
}
template <class Parent>
void JSCallbackObject<Parent>::getOwnSpecialPropertyNames(JSObject* object, JSGlobalObject* globalObject, PropertyNameArray& propertyNames, DontEnumPropertiesMode mode)
{
VM& vm = getVM(globalObject);
JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(object);
JSContextRef execRef = toRef(globalObject);
JSObjectRef thisRef = toRef(jsCast<JSObject*>(thisObject));
for (JSClassRef jsClass = thisObject->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectGetPropertyNamesCallback getPropertyNames = jsClass->getPropertyNames) {
JSLock::DropAllLocks dropAllLocks(globalObject);
getPropertyNames(execRef, thisRef, toRef(&propertyNames));
}
if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(globalObject)) {
typedef OpaqueJSClassStaticValuesTable::const_iterator iterator;
iterator end = staticValues->end();
for (iterator it = staticValues->begin(); it != end; ++it) {
StringImpl* name = it->key.get();
StaticValueEntry* entry = it->value.get();
if (entry->getProperty && (mode == DontEnumPropertiesMode::Include || !(entry->attributes & kJSPropertyAttributeDontEnum))) {
ASSERT(!name->isSymbol());
propertyNames.add(Identifier::fromString(vm, String(name)));
}
}
}
if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(globalObject)) {
typedef OpaqueJSClassStaticFunctionsTable::const_iterator iterator;
iterator end = staticFunctions->end();
for (iterator it = staticFunctions->begin(); it != end; ++it) {
StringImpl* name = it->key.get();
StaticFunctionEntry* entry = it->value.get();
if (mode == DontEnumPropertiesMode::Include || !(entry->attributes & kJSPropertyAttributeDontEnum)) {
ASSERT(!name->isSymbol());
propertyNames.add(Identifier::fromString(vm, String(name)));
}
}
}
}
}
template <class Parent>
void JSCallbackObject<Parent>::setPrivate(void* data)
{
m_callbackObjectData->privateData = data;
}
template <class Parent>
void* JSCallbackObject<Parent>::getPrivate()
{
return m_callbackObjectData->privateData;
}
template <class Parent>
bool JSCallbackObject<Parent>::inherits(JSClassRef c) const
{
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
if (jsClass == c)
return true;
}
return false;
}
template <class Parent>
JSValue JSCallbackObject<Parent>::getStaticValue(JSGlobalObject* globalObject, PropertyName propertyName)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSObjectRef thisRef = toRef(jsCast<JSObject*>(this));
if (StringImpl* name = propertyName.uid()) {
for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(globalObject)) {
if (StaticValueEntry* entry = staticValues->get(name)) {
if (JSObjectGetPropertyCallback getProperty = entry->getProperty) {
JSValueRef exception = nullptr;
JSValueRef value;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
value = getProperty(toRef(globalObject), thisRef, entry->propertyNameRef.get(), &exception);
}
if (exception) {
throwException(globalObject, scope, toJS(globalObject, exception));
return jsUndefined();
}
if (value)
return toJS(globalObject, value);
}
}
}
}
}
return JSValue();
}
template <class Parent>
EncodedJSValue JSCallbackObject<Parent>::staticFunctionGetterImpl(JSGlobalObject* globalObject, EncodedJSValue thisValue, PropertyName propertyName)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSCallbackObject* thisObj = asCallbackObject(thisValue);
// Check for cached or override property.
PropertySlot slot2(thisObj, PropertySlot::InternalMethodType::VMInquiry, &vm);
bool found = Parent::getOwnPropertySlot(thisObj, globalObject, propertyName, slot2);
RETURN_IF_EXCEPTION(scope, { });
slot2.disallowVMEntry.reset();
if (found)
return JSValue::encode(slot2.getValue(globalObject, propertyName));
if (StringImpl* name = propertyName.uid()) {
for (JSClassRef jsClass = thisObj->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(globalObject)) {
if (StaticFunctionEntry* entry = staticFunctions->get(name)) {
if (JSObjectCallAsFunctionCallback callAsFunction = entry->callAsFunction) {
JSObject* o = JSCallbackFunction::create(vm, thisObj->globalObject(vm), callAsFunction, name);
thisObj->putDirect(vm, propertyName, o, entry->attributes);
return JSValue::encode(o);
}
}
}
}
}
return JSValue::encode(throwException(globalObject, scope, createReferenceError(globalObject, "Static function property defined with NULL callAsFunction callback."_s)));
}
template <class Parent>
EncodedJSValue JSCallbackObject<Parent>::callbackGetterImpl(JSGlobalObject* globalObject, EncodedJSValue thisValue, PropertyName propertyName)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSCallbackObject* thisObj = asCallbackObject(thisValue);
JSObjectRef thisRef = toRef(jsCast<JSObject*>(thisObj));
RefPtr<OpaqueJSString> propertyNameRef;
if (StringImpl* name = propertyName.uid()) {
for (JSClassRef jsClass = thisObj->classRef(); jsClass; jsClass = jsClass->parentClass) {
if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
if (!propertyNameRef)
propertyNameRef = OpaqueJSString::tryCreate(name);
JSValueRef exception = nullptr;
JSValueRef value;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
value = getProperty(toRef(globalObject), thisRef, propertyNameRef.get(), &exception);
}
if (exception) {
throwException(globalObject, scope, toJS(globalObject, exception));
return JSValue::encode(jsUndefined());
}
if (value)
return JSValue::encode(toJS(globalObject, value));
}
}
}
return JSValue::encode(throwException(globalObject, scope, createReferenceError(globalObject, "hasProperty callback returned true for a property that doesn't exist."_s)));
}
} // namespace JSC
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