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Diffstat (limited to 'src/declarative/qml/qmlcontext.cpp')
| -rw-r--r-- | src/declarative/qml/qmlcontext.cpp | 574 |
1 files changed, 0 insertions, 574 deletions
diff --git a/src/declarative/qml/qmlcontext.cpp b/src/declarative/qml/qmlcontext.cpp deleted file mode 100644 index 1718387..0000000 --- a/src/declarative/qml/qmlcontext.cpp +++ /dev/null @@ -1,574 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the QtDeclarative module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 2.1 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 2.1 requirements -** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qmlcontext.h" -#include "qmlcontext_p.h" - -#include "qmlexpression_p.h" -#include "qmlengine_p.h" -#include "qmlengine.h" -#include "qmlcompiledbindings_p.h" -#include "qmlinfo.h" - -#include <qscriptengine.h> -#include <QtCore/qvarlengtharray.h> -#include <QtCore/qdebug.h> - -#include <private/qscriptdeclarativeclass_p.h> - -QT_BEGIN_NAMESPACE - -QmlContextPrivate::QmlContextPrivate() -: parent(0), engine(0), isInternal(false), propertyNames(0), - notifyIndex(-1), highPriorityCount(0), imports(0), expressions(0), contextObjects(0), - idValues(0), idValueCount(0), optimizedBindings(0) -{ -} - -void QmlContextPrivate::addScript(const QmlParser::Object::ScriptBlock &script, QObject *scopeObject) -{ - Q_Q(QmlContext); - - if (!engine) - return; - - QmlEnginePrivate *enginePriv = QmlEnginePrivate::get(engine); - QScriptEngine *scriptEngine = QmlEnginePrivate::getScriptEngine(engine); - - QScriptContext *scriptContext = QScriptDeclarativeClass::pushCleanContext(scriptEngine); - scriptContext->pushScope(enginePriv->contextClass->newContext(q, scopeObject)); - - QScriptValue scope = scriptEngine->newObject(); - scriptContext->setActivationObject(scope); - - for (int ii = 0; ii < script.codes.count(); ++ii) { - scriptEngine->evaluate(script.codes.at(ii), script.files.at(ii), script.lineNumbers.at(ii)); - - if (scriptEngine->hasUncaughtException()) { - QmlError error; - QmlExpressionPrivate::exceptionToError(scriptEngine, error); - qWarning().nospace() << qPrintable(error.toString()); - } - } - - scriptEngine->popContext(); - - scripts.append(scope); -} - -void QmlContextPrivate::destroyed(ContextGuard *guard) -{ - Q_Q(QmlContext); - - // process of being deleted (which is *probably* why obj has been destroyed - // anyway), as we're about to get deleted which will invalidate all the - // expressions that could depend on us - QObject *parent = q->parent(); - if (parent && QObjectPrivate::get(parent)->wasDeleted) - return; - - while(guard->bindings) { - QObject *o = guard->bindings->target; - int mi = guard->bindings->methodIndex; - guard->bindings->clear(); - if (o) o->qt_metacall(QMetaObject::InvokeMetaMethod, mi, 0); - } - - for (int ii = 0; ii < idValueCount; ++ii) { - if (&idValues[ii] == guard) { - QMetaObject::activate(q, ii + notifyIndex, 0); - return; - } - } -} - -void QmlContextPrivate::init() -{ - Q_Q(QmlContext); - - if (parent) - parent->d_func()->childContexts.insert(q); -} - -/*! - \class QmlContext - \since 4.7 - \brief The QmlContext class defines a context within a QML engine. - \mainclass - - Contexts allow data to be exposed to the QML components instantiated by the - QML engine. - - Each QmlContext contains a set of properties, distinct from - its QObject properties, that allow data to be - explicitly bound to a context by name. The context properties are defined or - updated by calling QmlContext::setContextProperty(). The following example shows - a Qt model being bound to a context and then accessed from a QML file. - - \code - QmlEngine engine; - QmlContext context(engine.rootContext()); - context.setContextProperty("myModel", modelData); - - QmlComponent component(&engine, "ListView { model=myModel }"); - component.create(&context); - \endcode - - To simplify binding and maintaining larger data sets, QObject's can be - added to a QmlContext. These objects are known as the context's default - objects. In this case all the properties of the QObject are - made available by name in the context, as though they were all individually - added by calling QmlContext::setContextProperty(). Changes to the property's - values are detected through the property's notify signal. This method is - also slightly more faster than manually adding property values. - - The following example has the same effect as the one above, but it is - achieved using a default object. - - \code - class MyDataSet : ... { - ... - Q_PROPERTY(QAbstractItemModel *myModel READ model NOTIFY modelChanged) - ... - }; - - MyDataSet myDataSet; - QmlEngine engine; - QmlContext context(engine.rootContext()); - context.addDefaultObject(&myDataSet); - - QmlComponent component(&engine, "ListView { model=myModel }"); - component.create(&context); - \endcode - - Default objects added first take precedence over those added later. All properties - added explicitly by QmlContext::setContextProperty() take precedence over default - object properties. - - Contexts are hierarchal, with the \l {QmlEngine::rootContext()}{root context} - being created by the QmlEngine. A component instantiated in a given context - has access to that context's data, as well as the data defined by its - ancestor contexts. Data values (including those added implicitly by the - default objects) in a context override those in ancestor contexts. Data - that should be available to all components instantiated by the QmlEngine - should be added to the \l {QmlEngine::rootContext()}{root context}. - - In the following example, - - \code - QmlEngine engine; - QmlContext context1(engine.rootContext()); - QmlContext context2(&context1); - QmlContext context3(&context2); - - context1.setContextProperty("a", 12); - context2.setContextProperty("b", 13); - context3.setContextProperty("a", 14); - context3.setContextProperty("c", 14); - \endcode - - a QML component instantiated in context1 would have access to the "a" data, - a QML component instantiated in context2 would have access to the "a" and - "b" data, and a QML component instantiated in context3 would have access to - the "a", "b" and "c" data - although its "a" data would return 14, unlike - that in context1 or context2. -*/ - -/*! \internal */ -QmlContext::QmlContext(QmlEngine *e, bool) -: QObject(*(new QmlContextPrivate)) -{ - Q_D(QmlContext); - d->engine = e; - d->init(); -} - -/*! - Create a new QmlContext as a child of \a engine's root context, and the - QObject \a parent. -*/ -QmlContext::QmlContext(QmlEngine *engine, QObject *parent) -: QObject(*(new QmlContextPrivate), parent) -{ - Q_D(QmlContext); - QmlContext *parentContext = engine?engine->rootContext():0; - d->parent = parentContext; - d->engine = parentContext->engine(); - d->init(); -} - -/*! - Create a new QmlContext with the given \a parentContext, and the - QObject \a parent. -*/ -QmlContext::QmlContext(QmlContext *parentContext, QObject *parent) -: QObject(*(new QmlContextPrivate), parent) -{ - Q_D(QmlContext); - d->parent = parentContext; - d->engine = parentContext->engine(); - d->init(); -} - -/*! - \internal -*/ -QmlContext::QmlContext(QmlContext *parentContext, QObject *parent, bool) -: QObject(*(new QmlContextPrivate), parent) -{ - Q_D(QmlContext); - d->parent = parentContext; - d->engine = parentContext->engine(); - d->isInternal = true; - d->init(); -} - -/*! - Destroys the QmlContext. - - Any expressions, or sub-contexts dependent on this context will be - invalidated, but not destroyed (unless they are parented to the QmlContext - object). - */ -QmlContext::~QmlContext() -{ - Q_D(QmlContext); - if (d->parent) - d->parent->d_func()->childContexts.remove(this); - - for (QSet<QmlContext *>::ConstIterator iter = d->childContexts.begin(); - iter != d->childContexts.end(); - ++iter) { - (*iter)->d_func()->invalidateEngines(); - (*iter)->d_func()->parent = 0; - } - - QmlAbstractExpression *expression = d->expressions; - while (expression) { - QmlAbstractExpression *nextExpression = expression->m_nextExpression; - - expression->m_context = 0; - expression->m_prevExpression = 0; - expression->m_nextExpression = 0; - - expression = nextExpression; - } - - while (d->contextObjects) { - QmlDeclarativeData *co = d->contextObjects; - d->contextObjects = d->contextObjects->nextContextObject; - - co->context = 0; - co->nextContextObject = 0; - co->prevContextObject = 0; - } - - if (d->propertyNames) - d->propertyNames->release(); - - if (d->imports) - d->imports->release(); - - if (d->optimizedBindings) - d->optimizedBindings->release(); - - delete [] d->idValues; -} - -void QmlContextPrivate::invalidateEngines() -{ - if (!engine) - return; - engine = 0; - for (QSet<QmlContext *>::ConstIterator iter = childContexts.begin(); - iter != childContexts.end(); - ++iter) { - (*iter)->d_func()->invalidateEngines(); - } -} - -/* -Refreshes all expressions that could possibly depend on this context. -Refreshing flushes all context-tree dependent caches in the expressions, and should occur every -time the context tree *structure* (not values) changes. -*/ -void QmlContextPrivate::refreshExpressions() -{ - for (QSet<QmlContext *>::ConstIterator iter = childContexts.begin(); - iter != childContexts.end(); - ++iter) { - (*iter)->d_func()->refreshExpressions(); - } - - QmlAbstractExpression *expression = expressions; - while (expression) { - expression->refresh(); - expression = expression->m_nextExpression; - } -} - -/*! - Return the context's QmlEngine, or 0 if the context has no QmlEngine or the - QmlEngine was destroyed. -*/ -QmlEngine *QmlContext::engine() const -{ - Q_D(const QmlContext); - return d->engine; -} - -/*! - Return the context's parent QmlContext, or 0 if this context has no - parent or if the parent has been destroyed. -*/ -QmlContext *QmlContext::parentContext() const -{ - Q_D(const QmlContext); - return d->parent; -} - -/*! - Add \a defaultObject to this context. The object will be added after - any existing default objects. -*/ -void QmlContext::addDefaultObject(QObject *defaultObject) -{ - Q_D(QmlContext); - d->defaultObjects.prepend(defaultObject); -} - -/*! - Set a the \a value of the \a name property on this context. -*/ -void QmlContext::setContextProperty(const QString &name, const QVariant &value) -{ - Q_D(QmlContext); - if (d->notifyIndex == -1) - d->notifyIndex = this->metaObject()->methodCount(); - - if (d->engine) { - bool ok; - QObject *o = QmlEnginePrivate::get(d->engine)->toQObject(value, &ok); - if (ok) { - setContextProperty(name, o); - return; - } - } - - if (!d->propertyNames) d->propertyNames = new QmlIntegerCache(d->engine); - - int idx = d->propertyNames->value(name); - if (idx == -1) { - d->propertyNames->add(name, d->idValueCount + d->propertyValues.count()); - d->propertyValues.append(value); - - d->refreshExpressions(); - } else { - d->propertyValues[idx] = value; - QMetaObject::activate(this, idx + d->notifyIndex, 0); - } -} - -void QmlContextPrivate::setIdProperty(int idx, QObject *obj) -{ - if (notifyIndex == -1) { - Q_Q(QmlContext); - notifyIndex = q->metaObject()->methodCount(); - } - - idValues[idx].priv = this; - idValues[idx] = obj; -} - -void QmlContextPrivate::setIdPropertyData(QmlIntegerCache *data) -{ - Q_ASSERT(!propertyNames); - propertyNames = data; - propertyNames->addref(); - - idValueCount = data->count(); - idValues = new ContextGuard[idValueCount]; -} - -/*! - Set the \a value of the \a name property on this context. - - QmlContext does \bold not take ownership of \a value. -*/ -void QmlContext::setContextProperty(const QString &name, QObject *value) -{ - Q_D(QmlContext); - if (d->notifyIndex == -1) - d->notifyIndex = this->metaObject()->methodCount(); - - if (!d->propertyNames) d->propertyNames = new QmlIntegerCache(d->engine); - int idx = d->propertyNames->value(name); - - if (idx == -1) { - d->propertyNames->add(name, d->idValueCount + d->propertyValues.count()); - d->propertyValues.append(QVariant::fromValue(value)); - - d->refreshExpressions(); - } else { - d->propertyValues[idx] = QVariant::fromValue(value); - QMetaObject::activate(this, idx + d->notifyIndex, 0); - } -} - -/*! - Returns the value of the \a name property for this context - as a QVariant. - */ -QVariant QmlContext::contextProperty(const QString &name) const -{ - Q_D(const QmlContext); - QVariant value; - int idx = -1; - if (d->propertyNames) - idx = d->propertyNames->value(name); - - if (idx == -1) { - QByteArray utf8Name = name.toUtf8(); - for (int ii = d->defaultObjects.count() - 1; ii >= 0; --ii) { - QObject *obj = d->defaultObjects.at(ii); - QmlPropertyCache::Data local; - QmlPropertyCache::Data *property = QmlPropertyCache::property(d->engine, obj, name, local); - - if (property) { - value = obj->metaObject()->property(property->coreIndex).read(obj); - break; - } - } - if (!value.isValid() && parentContext()) - value = parentContext()->contextProperty(name); - } else { - value = d->propertyValues[idx]; - } - - return value; -} - -/*! - Resolves the URL \a src relative to the URL of the - containing component. - - \sa QmlEngine::baseUrl(), setBaseUrl() -*/ -QUrl QmlContext::resolvedUrl(const QUrl &src) -{ - Q_D(QmlContext); - QmlContext *ctxt = this; - if (src.isRelative() && !src.isEmpty()) { - if (ctxt) { - while(ctxt) { - if(ctxt->d_func()->url.isValid()) - break; - else - ctxt = ctxt->parentContext(); - } - - if (ctxt) - return ctxt->d_func()->url.resolved(src); - else if (d->engine) - return d->engine->baseUrl().resolved(src); - } - return QUrl(); - } else { - return src; - } -} - -/*! - Explicitly sets the url resolvedUrl() will use for relative references to \a baseUrl. - - Calling this function will override the url of the containing - component used by default. - - \sa resolvedUrl() -*/ -void QmlContext::setBaseUrl(const QUrl &baseUrl) -{ - d_func()->url = baseUrl; -} - -/*! - Returns the base url of the component, or the containing component - if none is set. -*/ -QUrl QmlContext::baseUrl() const -{ - const QmlContext* p = this; - while (p && p->d_func()->url.isEmpty()) { - p = p->parentContext(); - } - if (p) - return p->d_func()->url; - else - return QUrl(); -} - -int QmlContextPrivate::context_count(QmlListProperty<QObject> *prop) -{ - QmlContext *context = static_cast<QmlContext*>(prop->object); - QmlContextPrivate *d = QmlContextPrivate::get(context); - int contextProperty = (int)(intptr_t)prop->data; - - if (d->propertyValues.at(contextProperty).userType() != qMetaTypeId<QList<QObject*> >()) { - return 0; - } else { - return ((const QList<QObject> *)d->propertyValues.at(contextProperty).constData())->count(); - } -} - -QObject *QmlContextPrivate::context_at(QmlListProperty<QObject> *prop, int index) -{ - QmlContext *context = static_cast<QmlContext*>(prop->object); - QmlContextPrivate *d = QmlContextPrivate::get(context); - int contextProperty = (int)(intptr_t)prop->data; - - if (d->propertyValues.at(contextProperty).userType() != qMetaTypeId<QList<QObject*> >()) { - return 0; - } else { - return ((const QList<QObject*> *)d->propertyValues.at(contextProperty).constData())->at(index); - } -} - -QT_END_NAMESPACE |