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| 1 | +// | |
| 2 | +// ScriptObjectQtProxy.cpp | |
| 3 | +// libraries/script-engine/src/qtscript | |
| 4 | +// | |
| 5 | +// Created by Heather Anderson on 12/5/21. | |
| 6 | +// Copyright 2021 Vircadia contributors. | |
| 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 | +#include "ScriptObjectQtProxy.h" | |
| 13 | + | |
| 14 | +#include <QtCore/QList> | |
| 15 | +#include <QtCore/QSharedPointer> | |
| 16 | + | |
| 17 | +#include <QtScript/QScriptContext> | |
| 18 | + | |
| 19 | +#include "ScriptContextQtWrapper.h" | |
| 20 | +#include "ScriptValueQtWrapper.h" | |
| 21 | + | |
| 22 | +Q_DECLARE_METATYPE(QScriptContext*) | |
| 23 | +Q_DECLARE_METATYPE(ScriptValue) | |
| 24 | +Q_DECLARE_METATYPE(QScriptValue) | |
| 25 | + | |
| 26 | +Q_DECLARE_METATYPE(QSharedPointer<ScriptObjectQtProxy>) | |
| 27 | +Q_DECLARE_METATYPE(QSharedPointer<ScriptVariantQtProxy>) | |
| 28 | + | |
| 29 | +// Used strictly to replace the "this" object value for property access. May expand to a full context element | |
| 30 | +// if we find it necessary to, but hopefully not needed | |
| 31 | +class ScriptPropertyContextQtWrapper final : public ScriptContext { | |
| 32 | +public: // construction | |
| 33 | + inline ScriptPropertyContextQtWrapper(const ScriptValue& object, ScriptContext* parentContext) : | |
| 34 | + _parent(parentContext), _object(object) {} | |
| 35 | + | |
| 36 | +public: // ScriptContext implementation | |
| 37 | + virtual int argumentCount() const override { return _parent->argumentCount(); } | |
| 38 | + virtual ScriptValue argument(int index) const override { return _parent->argument(index); } | |
| 39 | + virtual QStringList backtrace() const override { return _parent->backtrace(); } | |
| 40 | + virtual ScriptValue callee() const override { return _parent->callee(); } | |
| 41 | + virtual ScriptEnginePointer engine() const override { return _parent->engine(); } | |
| 42 | + virtual ScriptFunctionContextPointer functionContext() const override { return _parent->functionContext(); } | |
| 43 | + virtual ScriptContextPointer parentContext() const override { return _parent->parentContext(); } | |
| 44 | + virtual ScriptValue thisObject() const override { return _object; } | |
| 45 | + virtual ScriptValue throwError(const QString& text) override { return _parent->throwError(text); } | |
| 46 | + virtual ScriptValue throwValue(const ScriptValue& value) override { return _parent->throwValue(value); } | |
| 47 | + | |
| 48 | +private: // storage | |
| 49 | + ScriptContext* _parent; | |
| 50 | + const ScriptValue& _object; | |
| 51 | +}; | |
| 52 | + | |
| 53 | +QScriptValue ScriptObjectQtProxy::newQObject(ScriptEngineQtScript* engine, QObject* object, | |
| 54 | + ScriptEngine::ValueOwnership ownership, | |
| 55 | + const ScriptEngine::QObjectWrapOptions& options) { | |
| 56 | + bool ownsObject; | |
| 57 | + switch (ownership) { | |
| 58 | + case ScriptEngine::QtOwnership: | |
| 59 | + ownsObject = false; | |
| 60 | + break; | |
| 61 | + case ScriptEngine::ScriptOwnership: | |
| 62 | + ownsObject = true; | |
| 63 | + break; | |
| 64 | + case ScriptEngine::AutoOwnership: | |
| 65 | + ownsObject = !object->parent(); | |
| 66 | + break; | |
| 67 | + } | |
| 68 | + QScriptEngine* qengine = static_cast<QScriptEngine*>(engine); | |
| 69 | + auto proxy = QSharedPointer<ScriptObjectQtProxy>::create(engine, object, ownsObject, options); | |
| 70 | + return static_cast<QScriptEngine*>(engine)->newObject(proxy.get(), qengine->newVariant(QVariant::fromValue(proxy))); | |
| 71 | +} | |
| 72 | + | |
| 73 | +ScriptObjectQtProxy* ScriptObjectQtProxy::unwrapProxy(const QScriptValue& val) { | |
| 74 | + QScriptClass* scriptClass = val.scriptClass(); | |
| 75 | + return scriptClass ? dynamic_cast<ScriptObjectQtProxy*>(scriptClass) : nullptr; | |
| 76 | +} | |
| 77 | + | |
| 78 | +QObject* ScriptObjectQtProxy::unwrap(const QScriptValue& val) { | |
| 79 | + if (val.isQObject()) { | |
| 80 | + return val.toQObject(); | |
| 81 | + } | |
| 82 | + ScriptObjectQtProxy* proxy = unwrapProxy(val); | |
| 83 | + return proxy ? proxy->toQtValue() : nullptr; | |
| 84 | +} | |
| 85 | + | |
| 86 | +ScriptObjectQtProxy::~ScriptObjectQtProxy() { | |
| 87 | + if (_ownsObject) { | |
| 88 | + QObject* qobject = _object; | |
| 89 | + if(qobject) qobject->deleteLater(); | |
| 90 | + } | |
| 91 | +} | |
| 92 | + | |
| 93 | +void ScriptObjectQtProxy::investigate() { | |
| 94 | + QObject* qobject = _object; | |
| 95 | + Q_ASSERT(qobject); | |
| 96 | + if (!qobject) return; | |
| 97 | + | |
| 98 | + const QMetaObject* metaObject = qobject->metaObject(); | |
| 99 | + _name = QString::fromLatin1(metaObject->className()); | |
| 100 | + | |
| 101 | + // discover properties | |
| 102 | + int startIdx = _wrapOptions & ScriptEngine::ExcludeSuperClassProperties ? metaObject->propertyOffset() : 0; | |
| 103 | + int num = metaObject->propertyCount(); | |
| 104 | + for (int idx = startIdx; idx < num; ++idx) { | |
| 105 | + QMetaProperty prop = metaObject->property(idx); | |
| 106 | + if (!prop.isScriptable()) continue; | |
| 107 | + | |
| 108 | + // always exclude child objects (at least until we decide otherwise) | |
| 109 | + int metaTypeId = prop.userType(); | |
| 110 | + if (metaTypeId != QMetaType::UnknownType) { | |
| 111 | + QMetaType metaType(metaTypeId); | |
| 112 | + if (metaType.flags() & QMetaType::PointerToQObject) { | |
| 113 | + continue; | |
| 114 | + } | |
| 115 | + } | |
| 116 | + | |
| 117 | + PropertyDef& propDef = _props.insert(idx, PropertyDef()).value(); | |
| 118 | + propDef.name = _engine->toStringHandle(QString::fromLatin1(prop.name())); | |
| 119 | + propDef.flags = QScriptValue::Undeletable | QScriptValue::PropertyGetter | QScriptValue::PropertySetter | | |
| 120 | + QScriptValue::QObjectMember; | |
| 121 | + if (prop.isConstant()) propDef.flags |= QScriptValue::ReadOnly; | |
| 122 | + } | |
| 123 | + | |
| 124 | + // discover methods | |
| 125 | + startIdx = _wrapOptions & ScriptEngine::ExcludeSuperClassMethods ? metaObject->methodCount() : 0; | |
| 126 | + num = metaObject->methodCount(); | |
| 127 | + QHash<QScriptString, int> methodNames; | |
| 128 | + for (int idx = startIdx; idx < num; ++idx) { | |
| 129 | + QMetaMethod method = metaObject->method(idx); | |
| 130 | + | |
| 131 | + // perhaps keep this comment? Calls (like AudioScriptingInterface::playSound) seem to expect non-public methods to be script-accessible | |
| 132 | + /* if (method.access() != QMetaMethod::Public) continue;*/ | |
| 133 | + | |
| 134 | + bool isSignal = false; | |
| 135 | + QByteArray szName = method.name(); | |
| 136 | + | |
| 137 | + switch (method.methodType()) { | |
| 138 | + case QMetaMethod::Constructor: | |
| 139 | + continue; | |
| 140 | + case QMetaMethod::Signal: | |
| 141 | + isSignal = true; | |
| 142 | + break; | |
| 143 | + case QMetaMethod::Slot: | |
| 144 | + if (_wrapOptions & ScriptEngine::ExcludeSlots) { | |
| 145 | + continue; | |
| 146 | + } | |
| 147 | + if (szName == "deleteLater") { | |
| 148 | + continue; | |
| 149 | + } | |
| 150 | + break; | |
| 151 | + } | |
| 152 | + | |
| 153 | + QScriptString name = _engine->toStringHandle(QString::fromLatin1(szName)); | |
| 154 | + auto nameLookup = methodNames.find(name); | |
| 155 | + if (isSignal) { | |
| 156 | + if (nameLookup == methodNames.end()) { | |
| 157 | + SignalDef& signalDef = _signals.insert(idx, SignalDef()).value(); | |
| 158 | + signalDef.name = name; | |
| 159 | + signalDef.signal = method; | |
| 160 | + methodNames.insert(name, idx); | |
| 161 | + } else { | |
| 162 | + int originalMethodId = nameLookup.value(); | |
| 163 | + SignalDefMap::iterator signalLookup = _signals.find(originalMethodId); | |
| 164 | + Q_ASSERT(signalLookup != _signals.end()); | |
| 165 | + SignalDef& signalDef = signalLookup.value(); | |
| 166 | + Q_ASSERT(signalDef.signal.parameterCount() != method.parameterCount()); | |
| 167 | + if (signalDef.signal.parameterCount() < method.parameterCount()) { | |
| 168 | + signalDef.signal = method; | |
| 169 | + } | |
| 170 | + } | |
| 171 | + } else { | |
| 172 | + if (nameLookup == methodNames.end()) { | |
| 173 | + MethodDef& methodDef = _methods.insert(idx, MethodDef()).value(); | |
| 174 | + methodDef.name = name; | |
| 175 | + methodDef.methods.append(method); | |
| 176 | + methodNames.insert(name, idx); | |
| 177 | + } else { | |
| 178 | + int originalMethodId = nameLookup.value(); | |
| 179 | + MethodDefMap::iterator methodLookup = _methods.find(originalMethodId); | |
| 180 | + Q_ASSERT(methodLookup != _methods.end()); | |
| 181 | + MethodDef& methodDef = methodLookup.value(); | |
| 182 | + methodDef.methods.append(method); | |
| 183 | + } | |
| 184 | + } | |
| 185 | + } | |
| 186 | +} | |
| 187 | + | |
| 188 | +QScriptClass::QueryFlags ScriptObjectQtProxy::queryProperty(const QScriptValue& object, const QScriptString& name, QueryFlags flags, uint* id) { | |
| 189 | + // check for properties | |
| 190 | + for (PropertyDefMap::const_iterator trans = _props.cbegin(); trans != _props.cend(); ++trans) { | |
| 191 | + const PropertyDef& propDef = trans.value(); | |
| 192 | + if (propDef.name != name) continue; | |
| 193 | + *id = trans.key() | PROPERTY_TYPE; | |
| 194 | + return flags & (HandlesReadAccess | HandlesWriteAccess); | |
| 195 | + } | |
| 196 | + | |
| 197 | + // check for methods | |
| 198 | + for (MethodDefMap::const_iterator trans = _methods.cbegin(); trans != _methods.cend(); ++trans) { | |
| 199 | + if (trans.value().name != name) continue; | |
| 200 | + *id = trans.key() | METHOD_TYPE; | |
| 201 | + return flags & (HandlesReadAccess | HandlesWriteAccess); | |
| 202 | + } | |
| 203 | + | |
| 204 | + // check for signals | |
| 205 | + for (SignalDefMap::const_iterator trans = _signals.cbegin(); trans != _signals.cend(); ++trans) { | |
| 206 | + if (trans.value().name != name) continue; | |
| 207 | + *id = trans.key() | SIGNAL_TYPE; | |
| 208 | + return flags & (HandlesReadAccess | HandlesWriteAccess); | |
| 209 | + } | |
| 210 | + | |
| 211 | + return QueryFlags(); | |
| 212 | +} | |
| 213 | + | |
| 214 | +QScriptValue::PropertyFlags ScriptObjectQtProxy::propertyFlags(const QScriptValue& object, const QScriptString& name, uint id) { | |
| 215 | + QObject* qobject = _object; | |
| 216 | + if (!qobject) { | |
| 217 | + return QScriptValue::PropertyFlags(); | |
| 218 | + } | |
| 219 | + | |
| 220 | + switch (id & TYPE_MASK) { | |
| 221 | + case PROPERTY_TYPE: { | |
| 222 | + PropertyDefMap::const_iterator lookup = _props.find(id & ~TYPE_MASK); | |
| 223 | + if (lookup == _props.cend()) return QScriptValue::PropertyFlags(); | |
| 224 | + const PropertyDef& propDef = lookup.value(); | |
| 225 | + return propDef.flags; | |
| 226 | + } | |
| 227 | + case METHOD_TYPE: { | |
| 228 | + MethodDefMap::const_iterator lookup = _methods.find(id & ~TYPE_MASK); | |
| 229 | + if (lookup == _methods.cend()) return QScriptValue::PropertyFlags(); | |
| 230 | + return QScriptValue::ReadOnly | QScriptValue::Undeletable | QScriptValue::QObjectMember; | |
| 231 | + } | |
| 232 | + case SIGNAL_TYPE: { | |
| 233 | + SignalDefMap::const_iterator lookup = _signals.find(id & ~TYPE_MASK); | |
| 234 | + if (lookup == _signals.cend()) return QScriptValue::PropertyFlags(); | |
| 235 | + return QScriptValue::ReadOnly | QScriptValue::Undeletable | QScriptValue::QObjectMember; | |
| 236 | + } | |
| 237 | + } | |
| 238 | + return QScriptValue::PropertyFlags(); | |
| 239 | +} | |
| 240 | + | |
| 241 | +QScriptValue ScriptObjectQtProxy::property(const QScriptValue& object, const QScriptString& name, uint id) { | |
| 242 | + QObject* qobject = _object; | |
| 243 | + if (!qobject) { | |
| 244 | + QScriptContext* currentContext = static_cast<QScriptEngine*>(_engine)->currentContext(); | |
| 245 | + currentContext->throwError(QScriptContext::ReferenceError, "Referencing deleted native object"); | |
| 246 | + return QScriptValue(); | |
| 247 | + } | |
| 248 | + | |
| 249 | + const QMetaObject* metaObject = qobject->metaObject(); | |
| 250 | + | |
| 251 | + switch (id & TYPE_MASK) { | |
| 252 | + case PROPERTY_TYPE: { | |
| 253 | + int propId = id & ~TYPE_MASK; | |
| 254 | + PropertyDefMap::const_iterator lookup = _props.find(propId); | |
| 255 | + if (lookup == _props.cend()) return QScriptValue(); | |
| 256 | + const PropertyDef& propDef = lookup.value(); | |
| 257 | + | |
| 258 | + QMetaProperty prop = metaObject->property(propId); | |
| 259 | + ScriptValue scriptThis = ScriptValue(new ScriptValueQtWrapper(_engine, object)); | |
| 260 | + ScriptPropertyContextQtWrapper ourContext(scriptThis, _engine->currentContext()); | |
| 261 | + ScriptContextGuard guard(&ourContext); | |
| 262 | + | |
| 263 | + QVariant varValue = prop.read(qobject); | |
| 264 | + return _engine->castVariantToValue(varValue); | |
| 265 | + } | |
| 266 | + case METHOD_TYPE: { | |
| 267 | + int methodId = id & ~TYPE_MASK; | |
| 268 | + MethodDefMap::const_iterator lookup = _methods.find(methodId); | |
| 269 | + if (lookup == _methods.cend()) return QScriptValue(); | |
| 270 | + return static_cast<QScriptEngine*>(_engine)->newObject( | |
| 271 | + new ScriptMethodQtProxy(_engine, qobject, object, name, lookup.value().methods)); | |
| 272 | + } | |
| 273 | + case SIGNAL_TYPE: { | |
| 274 | + int signalId = id & ~TYPE_MASK; | |
| 275 | + SignalDefMap::const_iterator defLookup = _signals.find(signalId); | |
| 276 | + if (defLookup == _signals.cend()) return QScriptValue(); | |
| 277 | + | |
| 278 | + InstanceMap::const_iterator instLookup = _signalInstances.find(signalId); | |
| 279 | + if (instLookup == _signalInstances.cend() || instLookup.value().isNull()) { | |
| 280 | + instLookup = _signalInstances.insert(signalId, | |
| 281 | + new ScriptSignalQtProxy(_engine, qobject, object, name, defLookup.value().signal)); | |
| 282 | + Q_ASSERT(instLookup != _signalInstances.cend()); | |
| 283 | + } | |
| 284 | + ScriptSignalQtProxy* proxy = instLookup.value(); | |
| 285 | + | |
| 286 | + QScriptEngine::QObjectWrapOptions options = QScriptEngine::ExcludeSuperClassContents | | |
| 287 | + QScriptEngine::ExcludeDeleteLater | | |
| 288 | + QScriptEngine::PreferExistingWrapperObject; | |
| 289 | + return static_cast<QScriptEngine*>(_engine)->newQObject(proxy, QScriptEngine::ScriptOwnership, options); | |
| 290 | + } | |
| 291 | + } | |
| 292 | + return QScriptValue(); | |
| 293 | +} | |
| 294 | + | |
| 295 | +void ScriptObjectQtProxy::setProperty(QScriptValue& object, const QScriptString& name, uint id, const QScriptValue& value) { | |
| 296 | + if (!(id & PROPERTY_TYPE)) return; | |
| 297 | + QObject* qobject = _object; | |
| 298 | + if (!qobject) { | |
| 299 | + QScriptContext* currentContext = static_cast<QScriptEngine*>(_engine)->currentContext(); | |
| 300 | + currentContext->throwError(QScriptContext::ReferenceError, "Referencing deleted native object"); | |
| 301 | + return; | |
| 302 | + } | |
| 303 | + | |
| 304 | + int propId = id & ~TYPE_MASK; | |
| 305 | + PropertyDefMap::const_iterator lookup = _props.find(propId); | |
| 306 | + if (lookup == _props.cend()) return; | |
| 307 | + const PropertyDef& propDef = lookup.value(); | |
| 308 | + if (propDef.flags & QScriptValue::ReadOnly) return; | |
| 309 | + | |
| 310 | + const QMetaObject* metaObject = qobject->metaObject(); | |
| 311 | + QMetaProperty prop = metaObject->property(propId); | |
| 312 | + | |
| 313 | + ScriptValue scriptThis = ScriptValue(new ScriptValueQtWrapper(_engine, object)); | |
| 314 | + ScriptPropertyContextQtWrapper ourContext(scriptThis, _engine->currentContext()); | |
| 315 | + ScriptContextGuard guard(&ourContext); | |
| 316 | + | |
| 317 | + int propTypeId = prop.userType(); | |
| 318 | + QVariant varValue; | |
| 319 | + if(!_engine->castValueToVariant(value, varValue, propTypeId)) { | |
| 320 | + QByteArray propTypeName = QMetaType(propTypeId).name(); | |
| 321 | + QByteArray valTypeName = value.toVariant().typeName(); | |
| 322 | + QScriptContext* currentContext = static_cast<QScriptEngine*>(_engine)->currentContext(); | |
| 323 | + currentContext->throwError(QScriptContext::TypeError, QString("Cannot convert %1 to %2").arg(valTypeName, propTypeName)); | |
| 324 | + return; | |
| 325 | + } | |
| 326 | + prop.write(qobject, varValue); | |
| 327 | +} | |
| 328 | + | |
| 329 | +ScriptVariantQtProxy::ScriptVariantQtProxy(ScriptEngineQtScript* engine, const QVariant& variant, QScriptValue scriptProto, ScriptObjectQtProxy* proto) : | |
| 330 | + QScriptClass(engine), _engine(engine), _variant(variant), _scriptProto(scriptProto), _proto(proto) { | |
| 331 | + _name = QString::fromLatin1(variant.typeName()); | |
| 332 | +} | |
| 333 | + | |
| 334 | +QScriptValue ScriptVariantQtProxy::newVariant(ScriptEngineQtScript* engine, const QVariant& variant, QScriptValue proto) { | |
| 335 | + QScriptEngine* qengine = static_cast<QScriptEngine*>(engine); | |
| 336 | + ScriptObjectQtProxy* protoProxy = ScriptObjectQtProxy::unwrapProxy(proto); | |
| 337 | + if (!protoProxy) { | |
| 338 | + Q_ASSERT(protoProxy); | |
| 339 | + return qengine->newVariant(variant); | |
| 340 | + } | |
| 341 | + auto proxy = QSharedPointer<ScriptVariantQtProxy>::create(engine, variant, proto, protoProxy); | |
| 342 | + return static_cast<QScriptEngine*>(engine)->newObject(proxy.get(), qengine->newVariant(QVariant::fromValue(proxy))); | |
| 343 | +} | |
| 344 | + | |
| 345 | +ScriptVariantQtProxy* ScriptVariantQtProxy::unwrapProxy(const QScriptValue& val) { | |
| 346 | + QScriptClass* scriptClass = val.scriptClass(); | |
| 347 | + return scriptClass ? dynamic_cast<ScriptVariantQtProxy*>(scriptClass) : nullptr; | |
| 348 | +} | |
| 349 | + | |
| 350 | +QVariant ScriptVariantQtProxy::unwrap(const QScriptValue& val) { | |
| 351 | + ScriptVariantQtProxy* proxy = unwrapProxy(val); | |
| 352 | + return proxy ? proxy->toQtValue() : QVariant(); | |
| 353 | +} | |
| 354 | + | |
| 355 | +bool ScriptMethodQtProxy::supportsExtension(Extension extension) const { | |
| 356 | + switch (extension) { | |
| 357 | + case Callable: | |
| 358 | + return true; | |
| 359 | + default: | |
| 360 | + return false; | |
| 361 | + } | |
| 362 | +} | |
| 363 | + | |
| 364 | +QVariant ScriptMethodQtProxy::extension(Extension extension, const QVariant& argument) { | |
| 365 | + if (extension != Callable) return QVariant(); | |
| 366 | + QScriptContext* context = qvariant_cast<QScriptContext*>(argument); | |
| 367 | + | |
| 368 | + QObject* qobject = _object; | |
| 369 | + if (!qobject) { | |
| 370 | + context->throwError(QScriptContext::ReferenceError, "Referencing deleted native object"); | |
| 371 | + return QVariant(); | |
| 372 | + } | |
| 373 | + | |
| 374 | + int scriptNumArgs = context->argumentCount(); | |
| 375 | + Q_ASSERT(scriptNumArgs < 10); | |
| 376 | + int numArgs = std::min(scriptNumArgs, 10); | |
| 377 | + | |
| 378 | + const int scriptValueTypeId = qMetaTypeId<ScriptValue>(); | |
| 379 | + | |
| 380 | + for (auto iter = _metas.cbegin(); iter != _metas.end(); ++iter) { | |
| 381 | + const QMetaMethod& meta = *iter; | |
| 382 | + int methodNumArgs = meta.parameterCount(); | |
| 383 | + if (methodNumArgs != numArgs) { | |
| 384 | + continue; | |
| 385 | + } | |
| 386 | + | |
| 387 | + QList<ScriptValue> qScriptArgList; | |
| 388 | + QList<QVariant> qVarArgList; | |
| 389 | + QGenericArgument qGenArgs[10]; | |
| 390 | + int arg; | |
| 391 | + bool conversionFailed = false; | |
| 392 | + for (arg = 0; arg < numArgs && !conversionFailed; ++arg) { | |
| 393 | + int methodArgTypeId = meta.parameterType(arg); | |
| 394 | + QScriptValue argVal = context->argument(arg); | |
| 395 | + if (methodArgTypeId == scriptValueTypeId) { | |
| 396 | + qScriptArgList.append(ScriptValue(new ScriptValueQtWrapper(_engine, argVal))); | |
| 397 | + qGenArgs[arg] = Q_ARG(ScriptValue, qScriptArgList.back()); | |
| 398 | + } else if (methodArgTypeId == QMetaType::QVariant) { | |
| 399 | + qVarArgList.append(argVal.toVariant()); | |
| 400 | + qGenArgs[arg] = Q_ARG(QVariant, qVarArgList.back()); | |
| 401 | + } else { | |
| 402 | + QVariant varArgVal; | |
| 403 | + if (!_engine->castValueToVariant(argVal, varArgVal, methodArgTypeId)) { | |
| 404 | + conversionFailed = true; | |
| 405 | + break; | |
| 406 | + /*QByteArray methodTypeName = QMetaType(methodArgTypeId).name(); | |
| 407 | + QByteArray argTypeName = argVal.toVariant().typeName(); | |
| 408 | + context->throwError(QScriptContext::TypeError, | |
| 409 | + QString("Cannot convert %1 to %2").arg(argTypeName, methodTypeName)); | |
| 410 | + return QVariant();*/ | |
| 411 | + } | |
| 412 | + qVarArgList.append(varArgVal); | |
| 413 | + const QVariant& converted = qVarArgList.back(); | |
| 414 | + | |
| 415 | + // a lot of type conversion assistance thanks to https://stackoverflow.com/questions/28457819/qt-invoke-method-with-qvariant | |
| 416 | + // A const_cast is needed because calling data() would detach the QVariant. | |
| 417 | + qGenArgs[arg] = | |
| 418 | + QGenericArgument(QMetaType::typeName(converted.userType()), const_cast<void*>(converted.constData())); | |
| 419 | + } | |
| 420 | + } | |
| 421 | + if (conversionFailed) { | |
| 422 | + continue; | |
| 423 | + } | |
| 424 | + | |
| 425 | + ScriptContextQtWrapper ourContext(_engine, context); | |
| 426 | + ScriptContextGuard guard(&ourContext); | |
| 427 | + | |
| 428 | + int returnTypeId = meta.returnType(); | |
| 429 | + if (returnTypeId == QMetaType::Void) { | |
| 430 | + bool success = meta.invoke(qobject, Qt::DirectConnection, qGenArgs[0], qGenArgs[1], qGenArgs[2], qGenArgs[3], | |
| 431 | + qGenArgs[4], qGenArgs[5], qGenArgs[6], qGenArgs[7], qGenArgs[8], qGenArgs[9]); | |
| 432 | + if (!success) { | |
| 433 | + context->throwError("Native call failed"); | |
| 434 | + } | |
| 435 | + return QVariant(); | |
| 436 | + } else if (returnTypeId == scriptValueTypeId) { | |
| 437 | + ScriptValue result; | |
| 438 | + bool success = meta.invoke(qobject, Qt::DirectConnection, Q_RETURN_ARG(ScriptValue, result), qGenArgs[0], | |
| 439 | + qGenArgs[1], qGenArgs[2], qGenArgs[3], qGenArgs[4], qGenArgs[5], qGenArgs[6], | |
| 440 | + qGenArgs[7], qGenArgs[8], qGenArgs[9]); | |
| 441 | + if (!success) { | |
| 442 | + context->throwError("Native call failed"); | |
| 443 | + return QVariant(); | |
| 444 | + } | |
| 445 | + QScriptValue qResult = ScriptValueQtWrapper::fullUnwrap(_engine, result); | |
| 446 | + return QVariant::fromValue(qResult); | |
| 447 | + } else { | |
| 448 | + // a lot of type conversion assistance thanks to https://stackoverflow.com/questions/28457819/qt-invoke-method-with-qvariant | |
| 449 | + const char* typeName = meta.typeName(); | |
| 450 | + QVariant qRetVal(returnTypeId, static_cast<void*>(NULL)); | |
| 451 | + QGenericReturnArgument sRetVal(typeName, const_cast<void*>(qRetVal.constData())); | |
| 452 | + | |
| 453 | + bool success = | |
| 454 | + meta.invoke(qobject, Qt::DirectConnection, sRetVal, qGenArgs[0], qGenArgs[1], qGenArgs[2], qGenArgs[3], | |
| 455 | + qGenArgs[4], qGenArgs[5], qGenArgs[6], qGenArgs[7], qGenArgs[8], qGenArgs[9]); | |
| 456 | + if (!success) { | |
| 457 | + context->throwError("Native call failed"); | |
| 458 | + return QVariant(); | |
| 459 | + } | |
| 460 | + QScriptValue qResult = _engine->castVariantToValue(qRetVal); | |
| 461 | + return QVariant::fromValue(qResult); | |
| 462 | + } | |
| 463 | + } | |
| 464 | + context->throwError("Native call failed: could not locate an overload with the requested arguments"); | |
| 465 | + return QVariant(); | |
| 466 | +} | |
| 467 | + | |
| 468 | +// Adapted from https://doc.qt.io/archives/qq/qq16-dynamicqobject.html, for connecting to a signal without a compile-time definition for it | |
| 469 | +int ScriptSignalQtProxy::qt_metacall(QMetaObject::Call call, int id, void** arguments) { | |
| 470 | + id = ScriptSignalQtProxyBase::qt_metacall(call, id, arguments); | |
| 471 | + if (id != 0 || call != QMetaObject::InvokeMetaMethod) { | |
| 472 | + return id; | |
| 473 | + } | |
| 474 | + | |
| 475 | + QScriptValueList args; | |
| 476 | + int numArgs = _meta.parameterCount(); | |
| 477 | + for (int arg = 0; arg < numArgs; ++arg) { | |
| 478 | + int methodArgTypeId = _meta.parameterType(arg); | |
| 479 | + QVariant argValue(methodArgTypeId, arguments[arg+1]); | |
| 480 | + args.append(_engine->castVariantToValue(argValue)); | |
| 481 | + } | |
| 482 | + | |
| 483 | + for (ConnectionList::iterator iter = _connections.begin(); iter != _connections.end(); ++iter) { | |
| 484 | + Connection& conn = *iter; | |
| 485 | + conn.callback.call(conn.thisValue, args); | |
| 486 | + } | |
| 487 | + | |
| 488 | + return -1; | |
| 489 | +} | |
| 490 | + | |
| 491 | +int ScriptSignalQtProxy::discoverMetaCallIdx() { | |
| 492 | + const QMetaObject* ourMeta = metaObject(); | |
| 493 | + return ourMeta->methodCount(); | |
| 494 | +} | |
| 495 | + | |
| 496 | +ScriptSignalQtProxy::ConnectionList::iterator ScriptSignalQtProxy::findConnection(QScriptValue thisObject, | |
| 497 | + QScriptValue callback) { | |
| 498 | + for (ConnectionList::iterator iter = _connections.begin(); iter != _connections.end(); ++iter) { | |
| 499 | + Connection& conn = *iter; | |
| 500 | + if (conn.callback.strictlyEquals(callback) && conn.thisValue.strictlyEquals(thisObject)) { | |
| 501 | + return iter; | |
| 502 | + } | |
| 503 | + } | |
| 504 | + return _connections.end(); | |
| 505 | +} | |
| 506 | + | |
| 507 | + | |
| 508 | +void ScriptSignalQtProxy::connect(QScriptValue arg0, QScriptValue arg1) { | |
| 509 | + QObject* qobject = _object; | |
| 510 | + if (!qobject) { | |
| 511 | + QScriptContext* currentContext = static_cast<QScriptEngine*>(_engine)->currentContext(); | |
| 512 | + currentContext->throwError(QScriptContext::ReferenceError, "Referencing deleted native object"); | |
| 513 | + return; | |
| 514 | + } | |
| 515 | + | |
| 516 | + // untangle the arguments | |
| 517 | + QScriptValue callback; | |
| 518 | + QScriptValue callbackThis; | |
| 519 | + if (arg1.isFunction()) { | |
| 520 | + callbackThis = arg0; | |
| 521 | + callback = arg1; | |
| 522 | + } else { | |
| 523 | + callback = arg0; | |
| 524 | + } | |
| 525 | + if (!callback.isFunction()) { | |
| 526 | + QScriptContext* currentContext = static_cast<QScriptEngine*>(_engine)->currentContext(); | |
| 527 | + currentContext->throwError(QScriptContext::TypeError, "Function expected as argument to 'connect'"); | |
| 528 | + return; | |
| 529 | + } | |
| 530 | + | |
| 531 | + // are we already connected? | |
| 532 | + ConnectionList::iterator lookup = findConnection(callbackThis, callback); | |
| 533 | + if (lookup != _connections.end()) { | |
| 534 | + return; // already exists | |
| 535 | + } | |
| 536 | + | |
| 537 | + // add a reference to ourselves to the destination callback | |
| 538 | + QScriptValue destData = callback.data(); | |
| 539 | + Q_ASSERT(!destData.isValid() || destData.isArray()); | |
| 540 | + if (!destData.isArray()) { | |
| 541 | + destData = static_cast<QScriptEngine*>(_engine)->newArray(); | |
| 542 | + } | |
| 543 | + { | |
| 544 | + QScriptValueList args; | |
| 545 | + args << thisObject(); | |
| 546 | + destData.property("push").call(destData, args); | |
| 547 | + } | |
| 548 | + callback.setData(destData); | |
| 549 | + | |
| 550 | + // add this to our internal list of connections | |
| 551 | + Connection newConn; | |
| 552 | + newConn.callback = callback; | |
| 553 | + newConn.thisValue = callbackThis; | |
| 554 | + _connections.append(newConn); | |
| 555 | + | |
| 556 | + // inform Qt that we're connecting to this signal | |
| 557 | + if (!_isConnected) { | |
| 558 | + auto result = QMetaObject::connect(qobject, _meta.methodIndex(), this, _metaCallId); | |
| 559 | + Q_ASSERT(result); | |
| 560 | + _isConnected = true; | |
| 561 | + } | |
| 562 | +} | |
| 563 | + | |
| 564 | +void ScriptSignalQtProxy::disconnect(QScriptValue arg0, QScriptValue arg1) { | |
| 565 | + QObject* qobject = _object; | |
| 566 | + if (!qobject) { | |
| 567 | + QScriptContext* currentContext = static_cast<QScriptEngine*>(_engine)->currentContext(); | |
| 568 | + currentContext->throwError(QScriptContext::ReferenceError, "Referencing deleted native object"); | |
| 569 | + return; | |
| 570 | + } | |
| 571 | + | |
| 572 | + // untangle the arguments | |
| 573 | + QScriptValue callback; | |
| 574 | + QScriptValue callbackThis; | |
| 575 | + if (arg1.isFunction()) { | |
| 576 | + callbackThis = arg0; | |
| 577 | + callback = arg1; | |
| 578 | + } else { | |
| 579 | + callback = arg0; | |
| 580 | + } | |
| 581 | + if (!callback.isFunction()) { | |
| 582 | + QScriptContext* currentContext = static_cast<QScriptEngine*>(_engine)->currentContext(); | |
| 583 | + currentContext->throwError(QScriptContext::TypeError, "Function expected as argument to 'disconnect'"); | |
| 584 | + return; | |
| 585 | + } | |
| 586 | + | |
| 587 | + // locate this connection in our list of connections | |
| 588 | + ConnectionList::iterator lookup = findConnection(callbackThis, callback); | |
| 589 | + if (lookup == _connections.end()) { | |
| 590 | + return; // not here | |
| 591 | + } | |
| 592 | + | |
| 593 | + // remove it from our internal list of connections | |
| 594 | + _connections.erase(lookup); | |
| 595 | + | |
| 596 | + // remove a reference to ourselves from the destination callback | |
| 597 | + QScriptValue destData = callback.data(); | |
| 598 | + Q_ASSERT(destData.isArray()); | |
| 599 | + if (destData.isArray()) { | |
| 600 | + QScriptValue qThis = thisObject(); | |
| 601 | + int len = destData.property("length").toInteger(); | |
| 602 | + bool foundIt = false; | |
| 603 | + for (int idx = 0; idx < len && !foundIt; ++idx) { | |
| 604 | + QScriptValue entry = destData.property(idx); | |
| 605 | + if (entry.strictlyEquals(qThis)) { | |
| 606 | + foundIt = true; | |
| 607 | + QScriptValueList args; | |
| 608 | + args << idx << 1; | |
| 609 | + destData.property("splice").call(destData, args); | |
| 610 | + } | |
| 611 | + } | |
| 612 | + Q_ASSERT(foundIt); | |
| 613 | + } | |
| 614 | + | |
| 615 | + // inform Qt that we're no longer connected to this signal | |
| 616 | + if (_connections.empty()) { | |
| 617 | + Q_ASSERT(_isConnected); | |
| 618 | + bool result = QMetaObject::disconnect(qobject, _meta.methodIndex(), this, _metaCallId); | |
| 619 | + Q_ASSERT(result); | |
| 620 | + _isConnected = false; | |
| 621 | + } | |
| 622 | +} | |