diff options
Diffstat (limited to 'src/qml/jsruntime/qv4qmlcontext.cpp')
| -rw-r--r-- | src/qml/jsruntime/qv4qmlcontext.cpp | 283 |
1 files changed, 268 insertions, 15 deletions
diff --git a/src/qml/jsruntime/qv4qmlcontext.cpp b/src/qml/jsruntime/qv4qmlcontext.cpp index 88b0822f42..97b955632d 100644 --- a/src/qml/jsruntime/qv4qmlcontext.cpp +++ b/src/qml/jsruntime/qv4qmlcontext.cpp @@ -55,6 +55,8 @@ #include <private/qjsvalue_p.h> #include <private/qv4qobjectwrapper_p.h> #include <private/qv4module_p.h> +#include <private/qv4lookup_p.h> +#include <private/qv4identifiertable_p.h> QT_BEGIN_NAMESPACE @@ -77,14 +79,11 @@ void Heap::QQmlContextWrapper::destroy() Object::destroy(); } -ReturnedValue QQmlContextWrapper::virtualGet(const Managed *m, PropertyKey id, const Value *receiver, bool *hasProperty) +ReturnedValue QQmlContextWrapper::getPropertyAndBase(const QQmlContextWrapper *resource, PropertyKey id, const Value *receiver, bool *hasProperty, Value *base, Lookup *lookup) { - Q_ASSERT(m->as<QQmlContextWrapper>()); - if (!id.isString()) - return Object::virtualGet(m, id, receiver, hasProperty); + return Object::virtualGet(resource, id, receiver, hasProperty); - const QQmlContextWrapper *resource = static_cast<const QQmlContextWrapper *>(m); QV4::ExecutionEngine *v4 = resource->engine(); QV4::Scope scope(v4); @@ -100,11 +99,11 @@ ReturnedValue QQmlContextWrapper::virtualGet(const Managed *m, PropertyKey id, c } } - return Object::virtualGet(m, id, receiver, hasProperty); + return Object::virtualGet(resource, id, receiver, hasProperty); } bool hasProp = false; - ScopedValue result(scope, Object::virtualGet(m, id, receiver, &hasProp)); + ScopedValue result(scope, Object::virtualGet(resource, id, receiver, &hasProp)); if (hasProp) { if (hasProperty) *hasProperty = hasProp; @@ -160,6 +159,8 @@ ReturnedValue QQmlContextWrapper::virtualGet(const Managed *m, PropertyKey id, c // Note: The scope object is only a QADMO for example when somebody registers a QQmlPropertyMap // sub-class as QML type and then instantiates it in .qml. if (scopeObject && QQmlPropertyCache::isDynamicMetaObject(scopeObject->metaObject())) { + // all bets are off, so don't try to optimize any lookups + lookup = nullptr; if (performGobalLookUp()) return result->asReturnedValue(); } @@ -172,11 +173,35 @@ ReturnedValue QQmlContextWrapper::virtualGet(const Managed *m, PropertyKey id, c if (hasProperty) *hasProperty = true; if (r.scriptIndex != -1) { + if (lookup) { + lookup->qmlContextScriptLookup.scriptIndex = r.scriptIndex; + lookup->qmlContextPropertyGetter = QQmlContextWrapper::lookupScript; + return lookup->qmlContextPropertyGetter(lookup, v4, base); + } QV4::ScopedObject scripts(scope, context->importedScripts.valueRef()); if (scripts) return scripts->get(r.scriptIndex); return QV4::Encode::null(); } else if (r.type.isValid()) { + if (lookup) { + if (r.type.isSingleton()) { + QQmlEngine *e = v4->qmlEngine(); + QQmlType::SingletonInstanceInfo *siinfo = r.type.singletonInstanceInfo(); + siinfo->init(e); + if (siinfo->qobjectApi(e)) { + lookup->qmlContextSingletonLookup.singleton = + static_cast<Heap::Object*>( + Value::fromReturnedValue( + QQmlTypeWrapper::create(v4, nullptr, r.type) + ).heapObject()); + } else { + QV4::ScopedObject o(scope, QJSValuePrivate::convertedToValue(v4, siinfo->scriptApi(e))); + lookup->qmlContextSingletonLookup.singleton = o->d(); + } + lookup->qmlContextPropertyGetter = QQmlContextWrapper::lookupSingleton; + return lookup->qmlContextPropertyGetter(lookup, v4, base); + } + } return QQmlTypeWrapper::create(v4, scopeObject, r.type); } else if (r.importNamespace) { return QQmlTypeWrapper::create(v4, scopeObject, context->imports, r.importNamespace); @@ -188,6 +213,15 @@ ReturnedValue QQmlContextWrapper::virtualGet(const Managed *m, PropertyKey id, c } QQmlEnginePrivate *ep = QQmlEnginePrivate::get(v4->qmlEngine()); + Lookup * const originalLookup = lookup; + + decltype(lookup->qmlContextPropertyGetter) contextGetterFunction = QQmlContextWrapper::lookupContextObjectProperty; + + // minor optimization so we don't potentially try two property lookups on the same object + if (scopeObject == context->contextObject) { + scopeObject = nullptr; + contextGetterFunction = QQmlContextWrapper::lookupScopeObjectProperty; + } while (context) { // Search context properties @@ -198,11 +232,17 @@ ReturnedValue QQmlContextWrapper::virtualGet(const Managed *m, PropertyKey id, c if (propertyIdx != -1) { if (propertyIdx < context->idValueCount) { + if (hasProperty) + *hasProperty = true; + + if (lookup) { + lookup->qmlContextIdObjectLookup.objectId = propertyIdx; + lookup->qmlContextPropertyGetter = QQmlContextWrapper::lookupIdObject; + return lookup->qmlContextPropertyGetter(lookup, v4, base); + } if (ep->propertyCapture) ep->propertyCapture->captureProperty(&context->idValues[propertyIdx].bindings); - if (hasProperty) - *hasProperty = true; return QV4::QObjectWrapper::wrap(v4, context->idValues[propertyIdx]); } else { @@ -229,11 +269,30 @@ ReturnedValue QQmlContextWrapper::virtualGet(const Managed *m, PropertyKey id, c // Search scope object if (scopeObject) { bool hasProp = false; + + QQmlPropertyData *propertyData = nullptr; QV4::ScopedValue result(scope, QV4::QObjectWrapper::getQmlProperty(v4, context, scopeObject, - name, QV4::QObjectWrapper::CheckRevision, &hasProp)); + name, QV4::QObjectWrapper::CheckRevision, &hasProp, &propertyData)); if (hasProp) { if (hasProperty) *hasProperty = true; + if (base) + *base = QV4::QObjectWrapper::wrap(v4, scopeObject); + + if (lookup && propertyData) { + QQmlData *ddata = QQmlData::get(scopeObject, false); + if (ddata && ddata->propertyCache) { + ScopedValue val(scope, base ? *base : Value::fromReturnedValue(QV4::QObjectWrapper::wrap(v4, scopeObject))); + const QObjectWrapper *That = static_cast<const QObjectWrapper *>(val->objectValue()); + lookup->qobjectLookup.ic = That->internalClass(); + lookup->qobjectLookup.staticQObject = nullptr; + lookup->qobjectLookup.propertyCache = ddata->propertyCache; + lookup->qobjectLookup.propertyCache->addref(); + lookup->qobjectLookup.propertyData = propertyData; + lookup->qmlContextPropertyGetter = QQmlContextWrapper::lookupScopeObjectProperty; + } + } + return result->asReturnedValue(); } } @@ -243,27 +302,73 @@ ReturnedValue QQmlContextWrapper::virtualGet(const Managed *m, PropertyKey id, c // Search context object if (context->contextObject) { bool hasProp = false; - result = QV4::QObjectWrapper::getQmlProperty(v4, context, context->contextObject, name, QV4::QObjectWrapper::CheckRevision, &hasProp); + QQmlPropertyData *propertyData = nullptr; + result = QV4::QObjectWrapper::getQmlProperty(v4, context, context->contextObject, + name, QV4::QObjectWrapper::CheckRevision, &hasProp, &propertyData); if (hasProp) { if (hasProperty) *hasProperty = true; + if (base) + *base = QV4::QObjectWrapper::wrap(v4, context->contextObject); + + if (lookup && propertyData) { + QQmlData *ddata = QQmlData::get(context->contextObject, false); + if (ddata && ddata->propertyCache) { + ScopedValue val(scope, base ? *base : Value::fromReturnedValue(QV4::QObjectWrapper::wrap(v4, context->contextObject))); + const QObjectWrapper *That = static_cast<const QObjectWrapper *>(val->objectValue()); + lookup->qobjectLookup.ic = That->internalClass(); + lookup->qobjectLookup.staticQObject = nullptr; + lookup->qobjectLookup.propertyCache = ddata->propertyCache; + lookup->qobjectLookup.propertyCache->addref(); + lookup->qobjectLookup.propertyData = propertyData; + lookup->qmlContextPropertyGetter = contextGetterFunction; + } + } + return result->asReturnedValue(); } } context = context->parent; + + // As the hierarchy of contexts is not stable, we can't do accelerated lookups beyond + // the immediate QML context (of the .qml file). + lookup = nullptr; } // Do a lookup in the global object here to avoid expressionContext->unresolvedNames becoming // true if we access properties of the global object. - if (performGobalLookUp()) - return result->asReturnedValue(); + if (originalLookup) { + // Try a lookup in the global object. It's theoretically possible to first find a property + // in the global object and then later a context property with the same name is added, but that + // never really worked as we used to detect access to global properties at type compile time anyway. + lookup = originalLookup; + result = lookup->resolveGlobalGetter(v4); + if (lookup->globalGetter != Lookup::globalGetterGeneric) { + if (hasProperty) + *hasProperty = true; + lookup->qmlContextGlobalLookup.getterTrampoline = lookup->globalGetter; + lookup->qmlContextPropertyGetter = QQmlContextWrapper::lookupInGlobalObject; + return result->asReturnedValue(); + } + lookup->qmlContextPropertyGetter = QQmlContextWrapper::resolveQmlContextPropertyLookupGetter; + } else { + if (performGobalLookUp()) + return result->asReturnedValue(); + } expressionContext->unresolvedNames = true; return Encode::undefined(); } +ReturnedValue QQmlContextWrapper::virtualGet(const Managed *m, PropertyKey id, const Value *receiver, bool *hasProperty) +{ + Q_ASSERT(m->as<QQmlContextWrapper>()); + const QQmlContextWrapper *This = static_cast<const QQmlContextWrapper *>(m); + return getPropertyAndBase(This, id, receiver, hasProperty, /*base*/nullptr); +} + bool QQmlContextWrapper::virtualPut(Managed *m, PropertyKey id, const Value &value, Value *receiver) { Q_ASSERT(m->as<QQmlContextWrapper>()); @@ -298,8 +403,16 @@ bool QQmlContextWrapper::virtualPut(Managed *m, PropertyKey id, const Value &val while (context) { const QV4::IdentifierHash &properties = context->propertyNames(); // Search context properties - if (properties.count() && properties.value(name) != -1) - return false; + if (properties.count()) { + const int propertyIndex = properties.value(name); + if (propertyIndex != -1) { + if (propertyIndex < context->idValueCount) { + v4->throwError(QLatin1String("left-hand side of assignment operator is not an lvalue")); + return false; + } + return false; + } + } // Search scope object if (scopeObject && @@ -323,6 +436,146 @@ bool QQmlContextWrapper::virtualPut(Managed *m, PropertyKey id, const Value &val return false; } +ReturnedValue QQmlContextWrapper::resolveQmlContextPropertyLookupGetter(Lookup *l, ExecutionEngine *engine, Value *base) +{ + Scope scope(engine); + PropertyKey name =engine->identifierTable->asPropertyKey(engine->currentStackFrame->v4Function->compilationUnit-> + runtimeStrings[l->nameIndex]); + + // Special hack for bounded signal expressions, where the parameters of signals are injected + // into the handler expression through the locals of the call context. So for onClicked: { ... } + // the parameters of the clicked signal are injected and we must allow for them to be found here + // before any other property from the QML context. + ExecutionContext &ctx = static_cast<ExecutionContext &>(engine->currentStackFrame->jsFrame->context); + if (ctx.d()->type == Heap::ExecutionContext::Type_CallContext) { + uint index = ctx.d()->internalClass->indexOfValueOrGetter(name); + if (index < UINT_MAX) + return static_cast<Heap::CallContext*>(ctx.d())->locals[index].asReturnedValue(); + } + + Scoped<QQmlContextWrapper> qmlContext(scope, engine->qmlContext()->qml()); + bool hasProperty = false; + ScopedValue result(scope, QQmlContextWrapper::getPropertyAndBase(qmlContext, name, /*receiver*/nullptr, + &hasProperty, base, l)); + if (!hasProperty) + return engine->throwReferenceError(name.toQString()); + return result->asReturnedValue(); +} + +ReturnedValue QQmlContextWrapper::lookupScript(Lookup *l, ExecutionEngine *engine, Value *base) +{ + Q_UNUSED(base) + Scope scope(engine); + Scoped<QmlContext> qmlContext(scope, engine->qmlContext()); + if (!qmlContext) + return QV4::Encode::null(); + + QQmlContextData *context = qmlContext->qmlContext(); + if (!context) + return QV4::Encode::null(); + + QV4::ScopedObject scripts(scope, context->importedScripts.valueRef()); + if (!scripts) + return QV4::Encode::null(); + return scripts->get(l->qmlContextScriptLookup.scriptIndex); +} + +ReturnedValue QQmlContextWrapper::lookupSingleton(Lookup *l, ExecutionEngine *engine, Value *base) +{ + Q_UNUSED(engine) + Q_UNUSED(base) + return Value::fromHeapObject(l->qmlContextSingletonLookup.singleton).asReturnedValue(); +} + +ReturnedValue QQmlContextWrapper::lookupIdObject(Lookup *l, ExecutionEngine *engine, Value *base) +{ + Q_UNUSED(base) + Scope scope(engine); + Scoped<QmlContext> qmlContext(scope, engine->qmlContext()); + if (!qmlContext) + return QV4::Encode::null(); + + QQmlContextData *context = qmlContext->qmlContext(); + if (!context) + return QV4::Encode::null(); + + QQmlEnginePrivate *qmlEngine = QQmlEnginePrivate::get(engine->qmlEngine()); + const int objectId = l->qmlContextIdObjectLookup.objectId; + + if (qmlEngine->propertyCapture) + qmlEngine->propertyCapture->captureProperty(&context->idValues[objectId].bindings); + + return QV4::QObjectWrapper::wrap(engine, context->idValues[objectId]); +} + +ReturnedValue QQmlContextWrapper::lookupScopeObjectProperty(Lookup *l, ExecutionEngine *engine, Value *base) +{ + Q_UNUSED(base) + Scope scope(engine); + Scoped<QmlContext> qmlContext(scope, engine->qmlContext()); + if (!qmlContext) + return QV4::Encode::undefined(); + + QObject *scopeObject = qmlContext->qmlScope(); + if (!scopeObject) + return QV4::Encode::undefined(); + + if (QQmlData::wasDeleted(scopeObject)) + return QV4::Encode::undefined(); + + const auto revertLookup = [l, engine, base]() { + l->qobjectLookup.propertyCache->release(); + l->qobjectLookup.propertyCache = nullptr; + l->qmlContextPropertyGetter = QQmlContextWrapper::resolveQmlContextPropertyLookupGetter; + return QQmlContextWrapper::resolveQmlContextPropertyLookupGetter(l, engine, base); + }; + + ScopedValue obj(scope, QV4::QObjectWrapper::wrap(engine, scopeObject)); + return QObjectWrapper::lookupGetterImpl(l, engine, obj, /*useOriginalProperty*/ true, revertLookup); +} + +ReturnedValue QQmlContextWrapper::lookupContextObjectProperty(Lookup *l, ExecutionEngine *engine, Value *base) +{ + Q_UNUSED(base) + Scope scope(engine); + Scoped<QmlContext> qmlContext(scope, engine->qmlContext()); + if (!qmlContext) + return QV4::Encode::undefined(); + + QQmlContextData *context = qmlContext->qmlContext(); + if (!context) + return QV4::Encode::undefined(); + + QObject *contextObject = context->contextObject; + if (!contextObject) + return QV4::Encode::undefined(); + + if (QQmlData::wasDeleted(contextObject)) + return QV4::Encode::undefined(); + + const auto revertLookup = [l, engine, base]() { + l->qobjectLookup.propertyCache->release(); + l->qobjectLookup.propertyCache = nullptr; + l->qmlContextPropertyGetter = QQmlContextWrapper::resolveQmlContextPropertyLookupGetter; + return QQmlContextWrapper::resolveQmlContextPropertyLookupGetter(l, engine, base); + }; + + ScopedValue obj(scope, QV4::QObjectWrapper::wrap(engine, contextObject)); + return QObjectWrapper::lookupGetterImpl(l, engine, obj, /*useOriginalProperty*/ true, revertLookup); +} + +ReturnedValue QQmlContextWrapper::lookupInGlobalObject(Lookup *l, ExecutionEngine *engine, Value *base) +{ + Q_UNUSED(base); + ReturnedValue result = l->qmlContextGlobalLookup.getterTrampoline(l, engine); + // In the unlikely event of mutation of the global object, update the trampoline. + if (l->qmlContextPropertyGetter != lookupInGlobalObject) { + l->qmlContextGlobalLookup.getterTrampoline = l->globalGetter; + l->qmlContextPropertyGetter = QQmlContextWrapper::lookupInGlobalObject; + } + return result; +} + void Heap::QmlContext::init(QV4::ExecutionContext *outerContext, QV4::QQmlContextWrapper *qml) { Heap::ExecutionContext::init(Heap::ExecutionContext::Type_QmlContext); |