diff options
Diffstat (limited to 'Source/JavaScriptCore/API/JSCallbackObjectFunctions.h')
| -rw-r--r-- | Source/JavaScriptCore/API/JSCallbackObjectFunctions.h | 607 |
1 files changed, 607 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/API/JSCallbackObjectFunctions.h b/Source/JavaScriptCore/API/JSCallbackObjectFunctions.h new file mode 100644 index 0000000..de5d842 --- /dev/null +++ b/Source/JavaScriptCore/API/JSCallbackObjectFunctions.h @@ -0,0 +1,607 @@ +/* + * 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(&info)); + return static_cast<JSCallbackObject*>(asObject(value)); +} + +template <class Base> +JSCallbackObject<Base>::JSCallbackObject(ExecState* exec, JSGlobalObject* globalObject, NonNullPassRefPtr<Structure> structure, JSClassRef jsClass, void* data) + : Base(globalObject, structure) + , m_callbackObjectData(adoptPtr(new JSCallbackObjectData(data, jsClass))) +{ + init(exec); +} + +// Global object constructor. +// FIXME: Move this into a separate JSGlobalCallbackObject class derived from this one. +template <class Base> +JSCallbackObject<Base>::JSCallbackObject(JSClassRef jsClass, NonNullPassRefPtr<Structure> structure) + : Base(structure) + , m_callbackObjectData(adoptPtr(new JSCallbackObjectData(0, jsClass))) +{ + 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)); + } +} + +template <class Base> +JSCallbackObject<Base>::~JSCallbackObject() +{ + JSObjectRef thisRef = toRef(this); + + for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) + if (JSObjectFinalizeCallback finalize = jsClass->finalize) + finalize(thisRef); +} + +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())) { + slot.setCustom(this, staticValueGetter); + 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>::getOwnPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot) +{ + return getOwnPropertySlot(exec, Identifier::from(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; + } else + throwError(exec, createReferenceError(exec, "Attempt to set a property that is not settable.")); + } + } + + if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) { + if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.impl())) { + if (entry->attributes & kJSPropertyAttributeReadOnly) + return; + JSCallbackObject<Base>::putDirect(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 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 : 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>::staticValueGetter(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 (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 throwError(exec, createReferenceError(exec, "Static value property defined with NULL getProperty callback.")); +} + +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(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 |