Showing the changes to libraries/script-engine/src/ArrayBufferClass.cpp (1 of 6 files). Show all
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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 | + | |