//// ArrayBufferClass.cpp////// Created by Clement on 7/3/14.// Copyright 2014 High Fidelity, Inc.//// Distributed under the Apache License, Version 2.0.// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include <QDebug> #include "ArrayBufferPrototype.h"#include "DataViewClass.h"#include "ScriptEngine.h"#include "TypedArrays.h" #include "ArrayBufferClass.h" static const QString CLASS_NAME = "ArrayBuffer"; // FIXME: Q_DECLARE_METATYPE is global and really belongs in a shared header file, not per .cpp like this// (see DataViewClass.cpp, etc. which would also have to be updated to resolve)Q_DECLARE_METATYPE(QScriptClass*)Q_DECLARE_METATYPE(QByteArray*)int qScriptClassPointerMetaTypeId = qRegisterMetaType<QScriptClass*>();int qByteArrayPointerMetaTypeId = qRegisterMetaType<QByteArray*>(); ArrayBufferClass::ArrayBufferClass(ScriptEngine* scriptEngine) :QObject(scriptEngine),QScriptClass(scriptEngine) { qScriptRegisterMetaType<QByteArray>(engine(), toScriptValue, fromScriptValue); QScriptValue global = engine()->globalObject(); // Save string handles for quick lookup _name = engine()->toStringHandle(CLASS_NAME.toLatin1()); _byteLength = engine()->toStringHandle(BYTE_LENGTH_PROPERTY_NAME.toLatin1()); // build prototype _proto = engine()->newQObject(new ArrayBufferPrototype(this), QScriptEngine::QtOwnership, QScriptEngine::SkipMethodsInEnumeration | QScriptEngine::ExcludeSuperClassMethods | QScriptEngine::ExcludeSuperClassProperties); _proto.setPrototype(global.property("Object").property("prototype")); // Register constructor _ctor = engine()->newFunction(construct, _proto); _ctor.setData(engine()->toScriptValue(this)); engine()->globalObject().setProperty(name(), _ctor); // Registering other array types // The script engine is there parent so it'll delete them with itself new DataViewClass(scriptEngine); new Int8ArrayClass(scriptEngine); new Uint8ArrayClass(scriptEngine); new Uint8ClampedArrayClass(scriptEngine); new Int16ArrayClass(scriptEngine); new Uint16ArrayClass(scriptEngine); new Int32ArrayClass(scriptEngine); new Uint32ArrayClass(scriptEngine); new Float32ArrayClass(scriptEngine); new Float64ArrayClass(scriptEngine);} QScriptValue ArrayBufferClass::newInstance(qint32 size) { const qint32 MAX_LENGTH = 100000000; if (size < 0) { engine()->evaluate("throw \"ArgumentError: negative length\""); return QScriptValue(); } if (size > MAX_LENGTH) { engine()->evaluate("throw \"ArgumentError: absurd length\""); return QScriptValue(); } engine()->reportAdditionalMemoryCost(size); QScriptEngine* eng = engine(); QVariant variant = QVariant::fromValue(QByteArray(size, 0)); QScriptValue data = eng->newVariant(variant); return engine()->newObject(this, data);} QScriptValue ArrayBufferClass::newInstance(const QByteArray& ba) { QScriptValue data = engine()->newVariant(QVariant::fromValue(ba)); return engine()->newObject(this, data);} QScriptValue ArrayBufferClass::construct(QScriptContext* context, QScriptEngine* engine) { ArrayBufferClass* cls = qscriptvalue_cast<ArrayBufferClass*>(context->callee().data()); if (!cls) { // return if callee (function called) is not of type ArrayBuffer return QScriptValue(); } QScriptValue arg = context->argument(0); if (!arg.isValid() || !arg.isNumber()) { return QScriptValue(); } quint32 size = arg.toInt32(); QScriptValue newObject = cls->newInstance(size); if (context->isCalledAsConstructor()) { // if called with keyword new, replace this object. context->setThisObject(newObject); return engine->undefinedValue(); } return newObject;} QScriptClass::QueryFlags ArrayBufferClass::queryProperty(const QScriptValue& object, const QScriptString& name, QueryFlags flags, uint* id) { QByteArray* ba = qscriptvalue_cast<QByteArray*>(object.data()); if (ba && name == _byteLength) { // if the property queried is byteLength, only handle read access return flags &= HandlesReadAccess; } return 0; // No access} QScriptValue ArrayBufferClass::property(const QScriptValue& object, const QScriptString& name, uint id) { QByteArray* ba = qscriptvalue_cast<QByteArray*>(object.data()); if (ba && name == _byteLength) { return ba->length(); } return QScriptValue();} QScriptValue::PropertyFlags ArrayBufferClass::propertyFlags(const QScriptValue& object, const QScriptString& name, uint id) { return QScriptValue::Undeletable;} QString ArrayBufferClass::name() const { return _name.toString();} QScriptValue ArrayBufferClass::prototype() const { return _proto;} QScriptValue ArrayBufferClass::toScriptValue(QScriptEngine* engine, const QByteArray& ba) { QScriptValue ctor = engine->globalObject().property(CLASS_NAME); ArrayBufferClass* cls = qscriptvalue_cast<ArrayBufferClass*>(ctor.data()); if (!cls) { if (engine->currentContext()) { engine->currentContext()->throwError("arrayBufferClass::toScriptValue -- could not get " + CLASS_NAME + " class constructor"); } return QScriptValue::NullValue; } return cls->newInstance(ba);} void ArrayBufferClass::fromScriptValue(const QScriptValue& object, QByteArray& byteArray) { if (object.isString()) { // UTF-8 encoded String byteArray = object.toString().toUtf8(); } else if (object.isArray()) { // Array of uint8s eg: [ 128, 3, 25, 234 ] auto Uint8Array = object.engine()->globalObject().property("Uint8Array"); auto typedArray = Uint8Array.construct(QScriptValueList{object}); if (QByteArray* buffer = qscriptvalue_cast<QByteArray*>(typedArray.property("buffer"))) { byteArray = *buffer; } } else if (object.isObject()) { // ArrayBuffer instance (or any JS class that supports coercion into QByteArray*) if (QByteArray* buffer = qscriptvalue_cast<QByteArray*>(object.data())) { byteArray = *buffer; } }}
//
// ArrayBufferClass.cpp
//
//
// Created by Clement on 7/3/14.
// Copyright 2014 High Fidelity, Inc.
//
// Distributed under the Apache License, Version 2.0.
// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
#include <QDebug>
#include "ArrayBufferPrototype.h"
#include "DataViewClass.h"
#include "ScriptEngine.h"
#include "TypedArrays.h"
#include "ArrayBufferClass.h"
static const QString CLASS_NAME = "ArrayBuffer";
// FIXME: Q_DECLARE_METATYPE is global and really belongs in a shared header file, not per .cpp like this
// (see DataViewClass.cpp, etc. which would also have to be updated to resolve)
Q_DECLARE_METATYPE(QScriptClass*)
Q_DECLARE_METATYPE(QByteArray*)
int qScriptClassPointerMetaTypeId = qRegisterMetaType<QScriptClass*>();
int qByteArrayPointerMetaTypeId = qRegisterMetaType<QByteArray*>();
ArrayBufferClass::ArrayBufferClass(ScriptEngine* scriptEngine) :
QObject(scriptEngine),
QScriptClass(scriptEngine) {
qScriptRegisterMetaType<QByteArray>(engine(), toScriptValue, fromScriptValue);
QScriptValue global = engine()->globalObject();
// Save string handles for quick lookup
_name = engine()->toStringHandle(CLASS_NAME.toLatin1());
_byteLength = engine()->toStringHandle(BYTE_LENGTH_PROPERTY_NAME.toLatin1());
// build prototype
_proto = engine()->newQObject(new ArrayBufferPrototype(this),
QScriptEngine::QtOwnership,
QScriptEngine::SkipMethodsInEnumeration |
QScriptEngine::ExcludeSuperClassMethods |
QScriptEngine::ExcludeSuperClassProperties);
_proto.setPrototype(global.property("Object").property("prototype"));
// Register constructor
_ctor = engine()->newFunction(construct, _proto);
_ctor.setData(engine()->toScriptValue(this));
engine()->globalObject().setProperty(name(), _ctor);
// Registering other array types
// The script engine is there parent so it'll delete them with itself
new DataViewClass(scriptEngine);
new Int8ArrayClass(scriptEngine);
new Uint8ArrayClass(scriptEngine);
new Uint8ClampedArrayClass(scriptEngine);
new Int16ArrayClass(scriptEngine);
new Uint16ArrayClass(scriptEngine);
new Int32ArrayClass(scriptEngine);
new Uint32ArrayClass(scriptEngine);
new Float32ArrayClass(scriptEngine);
new Float64ArrayClass(scriptEngine);
}
QScriptValue ArrayBufferClass::newInstance(qint32 size) {
const qint32 MAX_LENGTH = 100000000;
if (size < 0) {
engine()->evaluate("throw \"ArgumentError: negative length\"");
return QScriptValue();
}
if (size > MAX_LENGTH) {
engine()->evaluate("throw \"ArgumentError: absurd length\"");
return QScriptValue();
}
engine()->reportAdditionalMemoryCost(size);
QScriptEngine* eng = engine();
QVariant variant = QVariant::fromValue(QByteArray(size, 0));
QScriptValue data = eng->newVariant(variant);
return engine()->newObject(this, data);
}
QScriptValue ArrayBufferClass::newInstance(const QByteArray& ba) {
QScriptValue data = engine()->newVariant(QVariant::fromValue(ba));
return engine()->newObject(this, data);
}
QScriptValue ArrayBufferClass::construct(QScriptContext* context, QScriptEngine* engine) {
ArrayBufferClass* cls = qscriptvalue_cast<ArrayBufferClass*>(context->callee().data());
if (!cls) {
// return if callee (function called) is not of type ArrayBuffer
return QScriptValue();
}
QScriptValue arg = context->argument(0);
if (!arg.isValid() || !arg.isNumber()) {
return QScriptValue();
}
quint32 size = arg.toInt32();
QScriptValue newObject = cls->newInstance(size);
if (context->isCalledAsConstructor()) {
// if called with keyword new, replace this object.
context->setThisObject(newObject);
return engine->undefinedValue();
}
return newObject;
}
QScriptClass::QueryFlags ArrayBufferClass::queryProperty(const QScriptValue& object,
const QScriptString& name,
QueryFlags flags, uint* id) {
QByteArray* ba = qscriptvalue_cast<QByteArray*>(object.data());
if (ba && name == _byteLength) {
// if the property queried is byteLength, only handle read access
return flags &= HandlesReadAccess;
}
return 0; // No access
}
QScriptValue ArrayBufferClass::property(const QScriptValue& object,
const QScriptString& name, uint id) {
QByteArray* ba = qscriptvalue_cast<QByteArray*>(object.data());
if (ba && name == _byteLength) {
return ba->length();
}
return QScriptValue();
}
QScriptValue::PropertyFlags ArrayBufferClass::propertyFlags(const QScriptValue& object,
const QScriptString& name, uint id) {
return QScriptValue::Undeletable;
}
QString ArrayBufferClass::name() const {
return _name.toString();
}
QScriptValue ArrayBufferClass::prototype() const {
return _proto;
}
QScriptValue ArrayBufferClass::toScriptValue(QScriptEngine* engine, const QByteArray& ba) {
QScriptValue ctor = engine->globalObject().property(CLASS_NAME);
ArrayBufferClass* cls = qscriptvalue_cast<ArrayBufferClass*>(ctor.data());
if (!cls) {
if (engine->currentContext()) {
engine->currentContext()->throwError("arrayBufferClass::toScriptValue -- could not get " + CLASS_NAME + " class constructor");
}
return QScriptValue::NullValue;
}
return cls->newInstance(ba);
}
void ArrayBufferClass::fromScriptValue(const QScriptValue& object, QByteArray& byteArray) {
if (object.isString()) {
// UTF-8 encoded String
byteArray = object.toString().toUtf8();
} else if (object.isArray()) {
// Array of uint8s eg: [ 128, 3, 25, 234 ]
auto Uint8Array = object.engine()->globalObject().property("Uint8Array");
auto typedArray = Uint8Array.construct(QScriptValueList{object});
if (QByteArray* buffer = qscriptvalue_cast<QByteArray*>(typedArray.property("buffer"))) {
byteArray = *buffer;
}
} else if (object.isObject()) {
// ArrayBuffer instance (or any JS class that supports coercion into QByteArray*)
if (QByteArray* buffer = qscriptvalue_cast<QByteArray*>(object.data())) {
byteArray = *buffer;
}
}
}