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124 lines
4.2 KiB
C++
124 lines
4.2 KiB
C++
//
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// ArrayBufferClass.cpp
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//
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//
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// Created by Clement on 7/3/14.
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// Copyright 2014 High Fidelity, Inc.
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//
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// Distributed under the Apache License, Version 2.0.
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// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
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//
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#include "ArrayBufferPrototype.h"
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#include "ArrayBufferClass.h"
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static const QString CLASS_NAME = "ArrayBuffer";
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static const QString BYTE_LENGTH_PROPERTY_NAME = "byteLength";
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Q_DECLARE_METATYPE(QByteArray*)
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ArrayBufferClass::ArrayBufferClass(QScriptEngine* engine) : QObject(engine), QScriptClass(engine) {
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qScriptRegisterMetaType<QByteArray>(engine, toScriptValue, fromScriptValue);
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QScriptValue global = engine->globalObject();
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// Save string handles for quick lookup
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_name = engine->toStringHandle(CLASS_NAME.toLatin1());
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_byteLength = engine->toStringHandle(BYTE_LENGTH_PROPERTY_NAME.toLatin1());
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// build prototype
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_proto = engine->newQObject(new ArrayBufferPrototype(this),
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QScriptEngine::QtOwnership,
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QScriptEngine::SkipMethodsInEnumeration |
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QScriptEngine::ExcludeSuperClassMethods |
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QScriptEngine::ExcludeSuperClassProperties);
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_proto.setPrototype(global.property("Object").property("prototype"));
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_ctor = engine->newFunction(construct, _proto);
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_ctor.setData(engine->toScriptValue(this));
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engine->globalObject().setProperty(name(), _ctor);
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}
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QScriptValue ArrayBufferClass::newInstance(quint32 size) {
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engine()->reportAdditionalMemoryCost(size);
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QScriptValue data = engine()->newVariant(QVariant::fromValue(QByteArray(size, 0)));
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return engine()->newObject(this, data);
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}
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QScriptValue ArrayBufferClass::newInstance(const QByteArray& ba) {
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QScriptValue data = engine()->newVariant(QVariant::fromValue(ba));
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return engine()->newObject(this, data);
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}
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QScriptValue ArrayBufferClass::construct(QScriptContext* context, QScriptEngine* engine) {
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ArrayBufferClass* cls = qscriptvalue_cast<ArrayBufferClass*>(context->callee().data());
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if (!cls) {
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return QScriptValue();
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}
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QScriptValue arg = context->argument(0);
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if (!arg.isValid() || !arg.isNumber()) {
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return QScriptValue();
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}
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quint32 size = arg.toInt32();
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QScriptValue newObject = cls->newInstance(size);
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if (context->isCalledAsConstructor()) {
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context->setThisObject(newObject);
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return engine->undefinedValue();
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}
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return newObject;
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}
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QScriptClass::QueryFlags ArrayBufferClass::queryProperty(const QScriptValue& object,
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const QScriptString& name,
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QueryFlags flags, uint* id) {
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QByteArray* ba = qscriptvalue_cast<QByteArray*>(object.data());
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if (ba && name == _byteLength) {
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// if the property queried is byteLength, only handle read access
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return flags &= HandlesReadAccess;
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}
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return 0; // No access
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}
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QScriptValue ArrayBufferClass::property(const QScriptValue &object,
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const QScriptString &name, uint id) {
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QByteArray* ba = qscriptvalue_cast<QByteArray*>(object.data());
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if (ba && name == _byteLength) {
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return ba->length();
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}
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return QScriptValue();
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}
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QScriptValue::PropertyFlags ArrayBufferClass::propertyFlags(const QScriptValue& object,
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const QScriptString& name, uint id) {
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return QScriptValue::Undeletable;
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}
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QString ArrayBufferClass::name() const {
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return _name.toString();
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}
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QScriptValue ArrayBufferClass::prototype() const {
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return _proto;
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}
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QScriptValue ArrayBufferClass::toScriptValue(QScriptEngine* engine, const QByteArray& ba) {
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QScriptValue ctor = engine->globalObject().property(CLASS_NAME);
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ArrayBufferClass* cls = qscriptvalue_cast<ArrayBufferClass*>(ctor.data());
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if (!cls) {
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return engine->newVariant(QVariant::fromValue(ba));
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}
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return cls->newInstance(ba);
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}
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void ArrayBufferClass::fromScriptValue(const QScriptValue& obj, QByteArray& ba) {
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ba = qvariant_cast<QByteArray>(obj.data().toVariant());
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}
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