diff options
Diffstat (limited to 'src/qml/jsruntime/qv4qmlcontext.cpp')
| -rw-r--r-- | src/qml/jsruntime/qv4qmlcontext.cpp | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/src/qml/jsruntime/qv4qmlcontext.cpp b/src/qml/jsruntime/qv4qmlcontext.cpp new file mode 100644 index 0000000000..889f4ea288 --- /dev/null +++ b/src/qml/jsruntime/qv4qmlcontext.cpp @@ -0,0 +1,346 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtQml module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qv4qmlcontext_p.h" +#include <private/qv8engine_p.h> + +#include <private/qqmlengine_p.h> +#include <private/qqmlcontext_p.h> + +#include <private/qv4engine_p.h> +#include <private/qv4value_p.h> +#include <private/qv4objectproto_p.h> +#include <private/qv4mm_p.h> +#include <private/qv4function_p.h> +#include <private/qv4compileddata_p.h> +#include <private/qqmltypewrapper_p.h> +#include <private/qqmllistwrapper_p.h> +#include <private/qqmljavascriptexpression_p.h> +#include <private/qjsvalue_p.h> +#include <private/qv4qobjectwrapper_p.h> + +QT_BEGIN_NAMESPACE + +using namespace QV4; + +DEFINE_OBJECT_VTABLE(QmlContextWrapper); +DEFINE_MANAGED_VTABLE(QmlContext); + +void Heap::QmlContextWrapper::init(QQmlContextData *context, QObject *scopeObject, bool ownsContext) +{ + Object::init(); + readOnly = true; + this->ownsContext = ownsContext; + isNullWrapper = false; + this->context = new QQmlGuardedContextData(context); + this->scopeObject.init(scopeObject); +} + +void Heap::QmlContextWrapper::destroy() +{ + if (*context && ownsContext) + (*context)->destroy(); + delete context; + scopeObject.destroy(); + Object::destroy(); +} + +ReturnedValue QmlContextWrapper::get(const Managed *m, String *name, bool *hasProperty) +{ + Q_ASSERT(m->as<QmlContextWrapper>()); + const QmlContextWrapper *resource = static_cast<const QmlContextWrapper *>(m); + QV4::ExecutionEngine *v4 = resource->engine(); + QV4::Scope scope(v4); + + // In V8 the JS global object would come _before_ the QML global object, + // so simulate that here. + bool hasProp; + QV4::ScopedValue result(scope, v4->globalObject->get(name, &hasProp)); + if (hasProp) { + if (hasProperty) + *hasProperty = hasProp; + return result->asReturnedValue(); + } + + if (resource->d()->isNullWrapper) + return Object::get(m, name, hasProperty); + + if (v4->callingQmlContext() != *resource->d()->context) + return Object::get(m, name, hasProperty); + + result = Object::get(m, name, &hasProp); + if (hasProp) { + if (hasProperty) + *hasProperty = hasProp; + return result->asReturnedValue(); + } + + // Its possible we could delay the calculation of the "actual" context (in the case + // of sub contexts) until it is definately needed. + QQmlContextData *context = resource->getContext(); + QQmlContextData *expressionContext = context; + + if (!context) { + if (hasProperty) + *hasProperty = true; + return result->asReturnedValue(); + } + + // Search type (attached property/enum/imported scripts) names + // while (context) { + // Search context properties + // Search scope object + // Search context object + // context = context->parent + // } + + QObject *scopeObject = resource->getScopeObject(); + + if (context->imports && name->startsWithUpper()) { + // Search for attached properties, enums and imported scripts + QQmlTypeNameCache::Result r = context->imports->query(name); + + if (r.isValid()) { + if (hasProperty) + *hasProperty = true; + if (r.scriptIndex != -1) { + QV4::ScopedObject scripts(scope, context->importedScripts.valueRef()); + return scripts->getIndexed(r.scriptIndex); + } else if (r.type) { + return QmlTypeWrapper::create(v4, scopeObject, r.type); + } else if (r.importNamespace) { + return QmlTypeWrapper::create(v4, scopeObject, context->imports, r.importNamespace); + } + Q_ASSERT(!"Unreachable"); + } + + // Fall through + } + + QQmlEnginePrivate *ep = QQmlEnginePrivate::get(v4->qmlEngine()); + + while (context) { + // Search context properties + const QV4::IdentifierHash<int> &properties = context->propertyNames(); + if (properties.count()) { + int propertyIdx = properties.value(name); + + if (propertyIdx != -1) { + + if (propertyIdx < context->idValueCount) { + + if (ep->propertyCapture) + ep->propertyCapture->captureProperty(&context->idValues[propertyIdx].bindings); + if (hasProperty) + *hasProperty = true; + return QV4::QObjectWrapper::wrap(v4, context->idValues[propertyIdx]); + } else { + + QQmlContextPrivate *cp = context->asQQmlContextPrivate(); + + if (ep->propertyCapture) + ep->propertyCapture->captureProperty(context->asQQmlContext(), -1, propertyIdx + cp->notifyIndex); + + const QVariant &value = cp->propertyValues.at(propertyIdx); + if (hasProperty) + *hasProperty = true; + if (value.userType() == qMetaTypeId<QList<QObject*> >()) { + QQmlListProperty<QObject> prop(context->asQQmlContext(), (void*) qintptr(propertyIdx), + QQmlContextPrivate::context_count, + QQmlContextPrivate::context_at); + return QmlListWrapper::create(v4, prop, qMetaTypeId<QQmlListProperty<QObject> >()); + } else { + return scope.engine->fromVariant(cp->propertyValues.at(propertyIdx)); + } + } + } + } + + // Search scope object + if (scopeObject) { + bool hasProp = false; + QV4::ScopedValue result(scope, QV4::QObjectWrapper::getQmlProperty(v4, context, scopeObject, + name, QV4::QObjectWrapper::CheckRevision, &hasProp)); + if (hasProp) { + if (hasProperty) + *hasProperty = true; + return result->asReturnedValue(); + } + } + scopeObject = 0; + + + // Search context object + if (context->contextObject) { + bool hasProp = false; + result = QV4::QObjectWrapper::getQmlProperty(v4, context, context->contextObject, name, QV4::QObjectWrapper::CheckRevision, &hasProp); + if (hasProp) { + if (hasProperty) + *hasProperty = true; + return result->asReturnedValue(); + } + } + + context = context->parent; + } + + expressionContext->unresolvedNames = true; + + return Encode::undefined(); +} + +void QmlContextWrapper::put(Managed *m, String *name, const Value &value) +{ + Q_ASSERT(m->as<QmlContextWrapper>()); + QmlContextWrapper *resource = static_cast<QmlContextWrapper *>(m); + ExecutionEngine *v4 = resource->engine(); + QV4::Scope scope(v4); + if (scope.hasException()) + return; + QV4::Scoped<QmlContextWrapper> wrapper(scope, resource); + + uint member = wrapper->internalClass()->find(name); + if (member < UINT_MAX) { + wrapper->putValue(member, value); + return; + } + + if (wrapper->d()->isNullWrapper) { + if (wrapper && wrapper->d()->readOnly) { + QString error = QLatin1String("Invalid write to global property \"") + name->toQString() + + QLatin1Char('"'); + ScopedString e(scope, v4->newString(error)); + v4->throwError(e); + return; + } + + Object::put(m, name, value); + return; + } + + // Its possible we could delay the calculation of the "actual" context (in the case + // of sub contexts) until it is definately needed. + QQmlContextData *context = wrapper->getContext(); + QQmlContextData *expressionContext = context; + + if (!context) + return; + + // See QV8ContextWrapper::Getter for resolution order + + QObject *scopeObject = wrapper->getScopeObject(); + + while (context) { + const QV4::IdentifierHash<int> &properties = context->propertyNames(); + // Search context properties + if (properties.count() && properties.value(name) != -1) + return; + + // Search scope object + if (scopeObject && + QV4::QObjectWrapper::setQmlProperty(v4, context, scopeObject, name, QV4::QObjectWrapper::CheckRevision, value)) + return; + scopeObject = 0; + + // Search context object + if (context->contextObject && + QV4::QObjectWrapper::setQmlProperty(v4, context, context->contextObject, name, QV4::QObjectWrapper::CheckRevision, value)) + return; + + context = context->parent; + } + + expressionContext->unresolvedNames = true; + + if (wrapper->d()->readOnly) { + QString error = QLatin1String("Invalid write to global property \"") + name->toQString() + + QLatin1Char('"'); + v4->throwError(error); + return; + } + + Object::put(m, name, value); +} + +void Heap::QmlContext::init(QV4::ExecutionContext *outerContext, QV4::QmlContextWrapper *qml) +{ + Heap::ExecutionContext::init(outerContext->engine(), Heap::ExecutionContext::Type_QmlContext); + outer = outerContext->d(); + strictMode = false; + callData = outer->callData; + lookups = outer->lookups; + constantTable = outer->constantTable; + compilationUnit = outer->compilationUnit; + + this->qml = qml->d(); +} + +Heap::QmlContext *QmlContext::createWorkerContext(ExecutionContext *parent, const QUrl &source, Value *sendFunction) +{ + Scope scope(parent); + + QQmlContextData *context = new QQmlContextData; + context->baseUrl = source; + context->baseUrlString = source.toString(); + context->isInternal = true; + context->isJSContext = true; + + Scoped<QmlContextWrapper> qml(scope, scope.engine->memoryManager->allocObject<QmlContextWrapper>(context, (QObject*)0, true)); + qml->d()->isNullWrapper = true; + + qml->setReadOnly(false); + QV4::ScopedObject api(scope, scope.engine->newObject()); + api->put(QV4::ScopedString(scope, scope.engine->newString(QStringLiteral("sendMessage"))), *sendFunction); + qml->QV4::Object::put(QV4::ScopedString(scope, scope.engine->newString(QStringLiteral("WorkerScript"))), api); + qml->setReadOnly(true); + + Heap::QmlContext *c = parent->d()->engine->memoryManager->alloc<QmlContext>(parent, qml); + return c; +} + +Heap::QmlContext *QmlContext::create(ExecutionContext *parent, QQmlContextData *context, QObject *scopeObject) +{ + Scope scope(parent); + + Scoped<QmlContextWrapper> qml(scope, scope.engine->memoryManager->allocObject<QmlContextWrapper>(context, scopeObject)); + Heap::QmlContext *c = parent->d()->engine->memoryManager->alloc<QmlContext>(parent, qml); + return c; +} + +QT_END_NAMESPACE |