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| 1 | // | ||
| 2 | // ArrayBufferClass.cpp | ||
| 3 | // | ||
| 4 | // | ||
| 5 | // Created by Clement on 7/3/14. | ||
| 6 | // Copyright 2014 High Fidelity, Inc. | ||
| 7 | // | ||
| 8 | // Distributed under the Apache License, Version 2.0. | ||
| 9 | // See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html | ||
| 10 | // | ||
| 11 | |||
| 12 | |||
| 13 | #include "ArrayBufferPrototype.h" | ||
| 14 | |||
| 15 | #include "ArrayBufferClass.h" | ||
| 16 | |||
| 17 | static const QString CLASS_NAME = "ArrayBuffer"; | ||
| 18 | static const QString BYTE_LENGTH_PROPERTY_NAME = "byteLength"; | ||
| 19 | |||
| 20 | Q_DECLARE_METATYPE(QByteArray*) | ||
| 21 | |||
| 22 | ArrayBufferClass::ArrayBufferClass(QScriptEngine* engine) : QObject(engine), QScriptClass(engine) { | ||
| 23 | qScriptRegisterMetaType<QByteArray>(engine, toScriptValue, fromScriptValue); | ||
| 24 | QScriptValue global = engine->globalObject(); | ||
| 25 | |||
| 26 | // Save string handles for quick lookup | ||
| 27 | _name = engine->toStringHandle(CLASS_NAME.toLatin1()); | ||
| 28 | _byteLength = engine->toStringHandle(BYTE_LENGTH_PROPERTY_NAME.toLatin1()); | ||
| 29 | |||
| 30 | // build prototype | ||
| 31 | _proto = engine->newQObject(new ArrayBufferPrototype(this), | ||
| 32 | QScriptEngine::QtOwnership, | ||
| 33 | QScriptEngine::SkipMethodsInEnumeration | | ||
| 34 | QScriptEngine::ExcludeSuperClassMethods | | ||
| 35 | QScriptEngine::ExcludeSuperClassProperties); | ||
| 36 | |||
| 37 | _proto.setPrototype(global.property("Object").property("prototype")); | ||
| 38 | |||
| 39 | _ctor = engine->newFunction(construct, _proto); | ||
| 40 | _ctor.setData(engine->toScriptValue(this)); | ||
| 41 | |||
| 42 | engine->globalObject().setProperty(name(), _ctor); | ||
| 43 | } | ||
| 44 | |||
| 45 | QScriptValue ArrayBufferClass::newInstance(unsigned long size) { | ||
| 46 | engine()->reportAdditionalMemoryCost(size); | ||
| 47 | QScriptValue data = engine()->newVariant(QVariant::fromValue(QByteArray(size, 0))); | ||
| 48 | return engine()->newObject(this, data); | ||
| 49 | } | ||
| 50 | |||
| 51 | QScriptValue ArrayBufferClass::newInstance(const QByteArray& ba) { | ||
| 52 | QScriptValue data = engine()->newVariant(QVariant::fromValue(ba)); | ||
| 53 | return engine()->newObject(this, data); | ||
| 54 | } | ||
| 55 | |||
| 56 | QScriptValue ArrayBufferClass::construct(QScriptContext* context, QScriptEngine* engine) { | ||
| 57 | ArrayBufferClass* cls = qscriptvalue_cast<ArrayBufferClass*>(context->callee().data()); | ||
| 58 | if (!cls) { | ||
| 59 | return QScriptValue(); | ||
| 60 | } | ||
| 61 | |||
| 62 | QScriptValue arg = context->argument(0); | ||
| 63 | unsigned long size = arg.toInt32(); | ||
| 64 | QScriptValue newObject = cls->newInstance(size); | ||
| 65 | |||
| 66 | if (context->isCalledAsConstructor()) { | ||
| 67 | context->setThisObject(newObject); | ||
| 68 | return engine->undefinedValue(); | ||
| 69 | } | ||
| 70 | |||
| 71 | return newObject; | ||
| 72 | } | ||
| 73 | |||
| 74 | QScriptClass::QueryFlags ArrayBufferClass::queryProperty(const QScriptValue& object, | ||
| 75 | const QScriptString& name, | ||
| 76 | QueryFlags flags, uint* id) { | ||
| 77 | QByteArray* ba = qscriptvalue_cast<QByteArray*>(object.data()); | ||
| 78 | if (ba && name == _byteLength) { | ||
| 79 | // if the property queried is byteLength, only handle read access | ||
| 80 | return flags &= HandlesReadAccess; | ||
| 81 | } | ||
| 82 | return 0; // No access | ||
| 83 | } | ||
| 84 | |||
| 85 | QScriptValue ArrayBufferClass::property(const QScriptValue &object, | ||
| 86 | const QScriptString &name, uint id) { | ||
| 87 | QByteArray* ba = qscriptvalue_cast<QByteArray*>(object.data()); | ||
| 88 | if (ba && name == _byteLength) { | ||
| 89 | return ba->length(); | ||
| 90 | } | ||
| 91 | return QScriptValue(); | ||
| 92 | } | ||
| 93 | |||
| 94 | QScriptValue::PropertyFlags ArrayBufferClass::propertyFlags(const QScriptValue& object, | ||
| 95 | const QScriptString& name, uint id) { | ||
| 96 | return QScriptValue::Undeletable; | ||
| 97 | } | ||
| 98 | |||
| 99 | QString ArrayBufferClass::name() const { | ||
| 100 | return _name.toString(); | ||
| 101 | } | ||
| 102 | |||
| 103 | QScriptValue ArrayBufferClass::prototype() const { | ||
| 104 | return _proto; | ||
| 105 | } | ||
| 106 | |||
| 107 | QScriptValue ArrayBufferClass::toScriptValue(QScriptEngine* engine, const QByteArray& ba) { | ||
| 108 | QScriptValue ctor = engine->globalObject().property(CLASS_NAME); | ||
| 109 | ArrayBufferClass* cls = qscriptvalue_cast<ArrayBufferClass*>(ctor.data()); | ||
| 110 | if (!cls) { | ||
| 111 | return engine->newVariant(QVariant::fromValue(ba)); | ||
| 112 | } | ||
| 113 | return cls->newInstance(ba); | ||
| 114 | } | ||
| 115 | |||
| 116 | void ArrayBufferClass::fromScriptValue(const QScriptValue& obj, QByteArray& ba) { | ||
| 117 | ba = qvariant_cast<QByteArray>(obj.data().toVariant()); | ||
| 118 | } | ||
| 119 | |||