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/****************************************************************************
**
** Copyright (c) 2015 Digia Plc
** For any questions to Digia, please use contact form at http://qt.digia.com/
**
** All Rights Reserved.
**
** NOTICE: All information contained herein is, and remains
** the property of Digia Plc and its suppliers,
** if any. The intellectual and technical concepts contained
** herein are proprietary to Digia Plc
** and its suppliers and may be covered by Finnish and Foreign Patents,
** patents in process, and are protected by trade secret or copyright law.
** Dissemination of this information or reproduction of this material
** is strictly forbidden unless prior written permission is obtained
** from Digia Plc.
****************************************************************************/
#include "signalevent.h"
#include "state.h"
#include "statemachine.h"
#include <QScxml/ecmascriptdatamodel.h>
#include <QScxml/scxmlstatetable.h>
#include <QScxml/scxmlparser.h>
#include <QQmlContext>
#include <QQmlEngine>
#include <QQmlInfo>
#include <QFile>
static void append(QQmlListProperty<QObject> *prop, QObject *o)
{
if (!o)
return;
if (State *state = qobject_cast<State *>(o)) {
state->setParent(prop->object);
static_cast<StateMachine::Kids *>(prop->data)->append(state);
emit static_cast<StateMachine *>(prop->object)->statesChanged();
} else if (SignalEvent *event = qobject_cast<SignalEvent *>(o)) {
event->setParent(prop->object);
static_cast<StateMachine::Kids *>(prop->data)->append(event);
emit static_cast<StateMachine *>(prop->object)->statesChanged();
}
}
static int count(QQmlListProperty<QObject> *prop)
{
return static_cast<StateMachine::Kids *>(prop->data)->count();
}
static QObject *at(QQmlListProperty<QObject> *prop, int index)
{
return static_cast<StateMachine::Kids *>(prop->data)->at(index);
}
static void clear(QQmlListProperty<QObject> *prop)
{
static_cast<StateMachine::Kids *>(prop->data)->clear();
emit static_cast<StateMachine *>(prop->object)->statesChanged();
}
StateMachine::StateMachine(QObject *parent)
: QObject(parent)
{
}
void StateMachine::componentComplete()
{
if (m_table == nullptr) {
qmlInfo(this) << "No state machine loaded.";
return;
}
bool ok = false;
bool moreOk = QMetaObject::invokeMethod(m_table, "init", Qt::DirectConnection, Q_RETURN_ARG(bool, ok));
if (ok && moreOk) {
QMetaObject::invokeMethod(m_table, "start");
} else {
qmlInfo(this) << "Failed to initialize the state machine.";
}
}
QQmlListProperty<QObject> StateMachine::states()
{
return QQmlListProperty<QObject>(this, &m_children, append, count, at, clear);
}
Scxml::StateTable *StateMachine::stateMachine() const
{
return m_table;
}
void StateMachine::setStateMachine(Scxml::StateTable *table)
{
qDebug()<<"setting state machine to"<<table;
if (m_table == nullptr && table != nullptr) {
m_table = table;
} else if (m_table) {
qmlInfo(this) << "Can set the table only once";
}
}
QString StateMachine::filename()
{
return m_filename;
}
void StateMachine::setFilename(const QString filename)
{
QString oldFilename = m_filename;
if (m_table) {
delete m_table;
m_table = nullptr;
}
if (parse(filename)) {
m_filename = filename;
emit filenameChanged();
} else {
m_filename.clear();
if (!oldFilename.isEmpty()) {
emit filenameChanged();
}
}
}
bool StateMachine::parse(const QString &filename)
{
QFile scxmlFile(filename);
if (!scxmlFile.open(QIODevice::ReadOnly)) {
qmlInfo(this) << QStringLiteral("ERROR: cannot open '%1' for reading!").arg(filename);
return false;
}
QXmlStreamReader xmlReader(&scxmlFile);
Scxml::ScxmlParser parser(&xmlReader);
parser.parse();
scxmlFile.close();
setStateMachine(parser.table());
if (parser.state() != Scxml::ScxmlParser::FinishedParsing || m_table == nullptr) {
qmlInfo(this) << QStringLiteral("Something went wrong while parsing '%1':").arg(filename) << endl;
foreach (const Scxml::ErrorMessage &msg, parser.errors()) {
qmlInfo(this) << msg.fileName << QStringLiteral(":") << msg.line
<< QStringLiteral(":") << msg.column
<< QStringLiteral(": ") << msg.severityString()
<< QStringLiteral(": ") << msg.msg;
}
return false;
}
return true;
}
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