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321 lines
11 KiB
C++
321 lines
11 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Copyright (C) 2016-2019 Ivailo Monev
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**
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** This file is part of the QtDeclarative module of the Katie Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qdeclarativeboundsignal_p.h"
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#include "qmetaobjectbuilder_p.h"
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#include "qdeclarativeengine_p.h"
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#include "qdeclarativeexpression_p.h"
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#include "qdeclarativecontext_p.h"
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#include "qdeclarativemetatype_p.h"
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#include "qdeclarative.h"
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#include "qdeclarativecontext.h"
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#include "qdeclarativeglobal_p.h"
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#include <QtCore/qdebug.h>
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QT_BEGIN_NAMESPACE
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class QDeclarativeBoundSignalParameters : public QObject
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{
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Q_OBJECT
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public:
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QDeclarativeBoundSignalParameters(const QMetaMethod &, QObject * = 0);
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~QDeclarativeBoundSignalParameters();
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void setValues(void **);
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void clearValues();
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private:
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friend class MetaObject;
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int metaCall(QMetaObject::Call, int _id, void **);
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struct MetaObject : public QAbstractDynamicMetaObject {
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MetaObject(QDeclarativeBoundSignalParameters *b)
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: parent(b) {}
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int metaCall(QMetaObject::Call c, int id, void **a) {
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return parent->metaCall(c, id, a);
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}
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QDeclarativeBoundSignalParameters *parent;
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};
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int *types;
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void **values;
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QMetaObject *myMetaObject;
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};
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static int evaluateIdx = -1;
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QDeclarativeAbstractBoundSignal::QDeclarativeAbstractBoundSignal(QObject *parent)
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: QObject(parent)
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{
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}
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QDeclarativeAbstractBoundSignal::~QDeclarativeAbstractBoundSignal()
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{
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}
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QDeclarativeBoundSignal::QDeclarativeBoundSignal(QObject *scope, const QMetaMethod &signal,
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QObject *parent)
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: m_expression(0), m_signal(signal), m_paramsValid(false), m_isEvaluating(false), m_params(0),
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m_scope(scope, this)
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{
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init(parent);
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}
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QDeclarativeBoundSignal::QDeclarativeBoundSignal(QDeclarativeContext *ctxt, const QString &val,
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QObject *scope, const QMetaMethod &signal,
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QObject *parent)
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: m_expression(0), m_signal(signal), m_paramsValid(false), m_isEvaluating(false), m_params(0),
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m_scope(scope, this)
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{
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init(parent);
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m_expression = new QDeclarativeExpression(ctxt, scope, val);
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}
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void QDeclarativeBoundSignal::init(QObject *parent)
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{
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// This is thread safe. Although it may be updated by two threads, they
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// will both set it to the same value - so the worst thing that can happen
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// is that they both do the work to figure it out. Boo hoo.
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if (evaluateIdx == -1) evaluateIdx = metaObject()->methodCount();
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QDeclarative_setParent_noEvent(this, parent);
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QDeclarativePropertyPrivate::connect(m_scope, m_signal.methodIndex(), this, evaluateIdx);
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QDeclarativeData * const data = QDeclarativeData::get(m_scope, true);
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data->addBoundSignal(this);
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}
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QDeclarativeBoundSignal::~QDeclarativeBoundSignal()
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{
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unregisterScopeObject();
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delete m_expression;
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m_expression = 0;
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}
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void QDeclarativeBoundSignal::disconnect()
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{
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QMetaObject::disconnect(m_scope, m_signal.methodIndex(), this, evaluateIdx);
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QObjectPrivate * const priv = QObjectPrivate::get(m_scope);
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QVarLengthArray<char> signalSignature;
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QObjectPrivate::signalSignature(m_signal, &signalSignature);
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priv->disconnectNotify(signalSignature.constData());
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}
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int QDeclarativeBoundSignal::index() const
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{
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return m_signal.methodIndex();
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}
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/*!
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Returns the signal expression.
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*/
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QDeclarativeExpression *QDeclarativeBoundSignal::expression() const
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{
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return m_expression;
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}
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/*!
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Sets the signal expression to \a e. Returns the current signal expression,
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or null if there is no signal expression.
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The QDeclarativeBoundSignal instance takes ownership of \a e. The caller is
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assumes ownership of the returned QDeclarativeExpression.
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*/
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QDeclarativeExpression *QDeclarativeBoundSignal::setExpression(QDeclarativeExpression *e)
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{
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QDeclarativeExpression *rv = m_expression;
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m_expression = e;
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if (m_expression) m_expression->setNotifyOnValueChanged(false);
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return rv;
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}
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QDeclarativeBoundSignal *QDeclarativeBoundSignal::cast(QObject *o)
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{
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QDeclarativeAbstractBoundSignal *s = qobject_cast<QDeclarativeAbstractBoundSignal*>(o);
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return static_cast<QDeclarativeBoundSignal *>(s);
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}
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int QDeclarativeBoundSignal::qt_metacall(QMetaObject::Call c, int id, void **a)
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{
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if (c == QMetaObject::InvokeMetaMethod && id == evaluateIdx) {
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if (!m_expression)
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return -1;
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m_isEvaluating = true;
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if (!m_paramsValid) {
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if (!m_signal.parameterTypes().isEmpty())
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m_params = new QDeclarativeBoundSignalParameters(m_signal, this);
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m_paramsValid = true;
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}
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if (m_params) m_params->setValues(a);
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if (m_expression && m_expression->engine()) {
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QDeclarativeExpressionPrivate::get(m_expression)->value(m_params);
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if (m_expression && m_expression->hasError())
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QDeclarativeEnginePrivate::warning(m_expression->engine(), m_expression->error());
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}
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if (m_params) m_params->clearValues();
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m_isEvaluating = false;
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return -1;
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} else {
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return QObject::qt_metacall(c, id, a);
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}
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}
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void QDeclarativeBoundSignal::unregisterScopeObject()
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{
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if (m_scope) {
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QDeclarativeData * const data = QDeclarativeData::get(m_scope, false);
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if (data)
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data->removeBoundSignal(this);
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}
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}
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QDeclarativeBoundSignalParameters::QDeclarativeBoundSignalParameters(const QMetaMethod &method,
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QObject *parent)
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: QObject(parent), types(0), values(0)
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{
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MetaObject *mo = new MetaObject(this);
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// ### Optimize!
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QMetaObjectBuilder mob;
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mob.setSuperClass(&QDeclarativeBoundSignalParameters::staticMetaObject);
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mob.setClassName("QDeclarativeBoundSignalParameters");
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QList<QByteArray> paramTypes = method.parameterTypes();
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QList<QByteArray> paramNames = method.parameterNames();
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types = new int[paramTypes.count()];
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for (int ii = 0; ii < paramTypes.count(); ++ii) {
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const QByteArray &type = paramTypes.at(ii);
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const QByteArray &name = paramNames.at(ii);
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if (name.isEmpty() || type.isEmpty()) {
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types[ii] = 0;
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continue;
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}
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QVariant::Type t = (QVariant::Type)QMetaType::type(type.constData());
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if (QDeclarativeMetaType::isQObject(t)) {
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types[ii] = QMetaType::QObjectStar;
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QMetaPropertyBuilder prop = mob.addProperty(name, "QObject*");
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prop.setWritable(false);
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} else {
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QByteArray propType = type;
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if (t >= QVariant::UserType || t == QVariant::Invalid) {
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//copy of QDeclarativeObjectScriptClass::enumType()
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QByteArray scope;
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QByteArray name;
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int scopeIdx = propType.lastIndexOf("::");
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if (scopeIdx != -1) {
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scope = propType.left(scopeIdx);
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name = propType.mid(scopeIdx + 2);
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} else {
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name = propType;
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}
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const QMetaObject *meta;
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if (scope == "Qt")
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meta = &QObject::staticQtMetaObject;
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else
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meta = parent->parent()->metaObject(); //### assumes parent->parent()
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for (int i = meta->enumeratorCount() - 1; i >= 0; --i) {
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QMetaEnum m = meta->enumerator(i);
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if ((m.name() == name) && (scope.isEmpty() || (m.scope() == scope))) {
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t = QVariant::Int;
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propType = "int";
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break;
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}
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}
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}
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if (QDeclarativeMetaType::canCopy(t)) {
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types[ii] = t;
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QMetaPropertyBuilder prop = mob.addProperty(name, propType);
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prop.setWritable(false);
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} else {
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types[ii] = 0x80000000 | t;
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QMetaPropertyBuilder prop = mob.addProperty(name, "QVariant");
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prop.setWritable(false);
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}
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}
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}
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myMetaObject = mob.toMetaObject();
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*static_cast<QMetaObject *>(mo) = *myMetaObject;
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d_ptr->metaObject = mo;
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}
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QDeclarativeBoundSignalParameters::~QDeclarativeBoundSignalParameters()
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{
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delete [] types;
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free(myMetaObject);
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}
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void QDeclarativeBoundSignalParameters::setValues(void **v)
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{
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values = v;
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}
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void QDeclarativeBoundSignalParameters::clearValues()
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{
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values = 0;
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}
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int QDeclarativeBoundSignalParameters::metaCall(QMetaObject::Call c, int id, void **a)
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{
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if (!values)
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return -1;
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if (c == QMetaObject::ReadProperty && id >= 1) {
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if (types[id - 1] & 0x80000000) {
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*((QVariant *)a[0]) = QVariant(types[id - 1] & 0x7FFFFFFF, values[id]);
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} else {
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QDeclarativeMetaType::copy(types[id - 1], a[0], values[id]);
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}
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return -1;
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} else {
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return qt_metacall(c, id, a);
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}
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}
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QT_END_NAMESPACE
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#include <moc_qdeclarativeboundsignal.cpp>
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#include <moc_qdeclarativeboundsignal_p.h>
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