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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Designer 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "formscriptrunner_p.h"
#include "formbuilderextra_p.h"
#include "ui4_p.h"
#include <QtScript/QScriptEngine>
#include <QtGui/QWidget>
#include <QtCore/QDebug>
#include <QtCore/QCoreApplication>
QT_BEGIN_NAMESPACE
namespace {
enum { debugFormScriptRunner = 0 };
}
#ifdef QFORMINTERNAL_NAMESPACE
namespace QFormInternal {
#endif
class QFormScriptRunner::QFormScriptRunnerPrivate {
public:
QFormScriptRunnerPrivate() : m_options(DisableScripts) {}
void clearErrors() { m_errors.clear(); }
bool run(const QString &script, QWidget *widget, const WidgetList &children, QString *errorMessage);
static void initializeEngine(QWidget *w, const WidgetList &children, QScriptEngine &scriptEngine);
static QString engineError(QScriptEngine &scriptEngine);
Options options() const { return m_options; }
void setOptions(Options options) { m_options = options; }
Errors errors() const { return m_errors; }
private:
QScriptEngine m_scriptEngine;
Options m_options;
Errors m_errors;
};
bool QFormScriptRunner::QFormScriptRunnerPrivate::run(const QString &script, QWidget *widget, const WidgetList &children, QString *errorMessage) {
bool rc = false;
initializeEngine(widget, children, m_scriptEngine);
do {
m_scriptEngine.evaluate(script);
if (m_scriptEngine.hasUncaughtException ()) {
*errorMessage = QCoreApplication::tr("Exception at line %1: %2").arg(m_scriptEngine.uncaughtExceptionLineNumber()).arg(engineError(m_scriptEngine));
break;
}
rc = true;
} while (false);
m_scriptEngine.popContext();
if (!rc) {
Error error;
error.objectName = widget->objectName();
error.script = script;
error.errorMessage = *errorMessage;
m_errors.push_back(error);
}
return rc;
}
void QFormScriptRunner::QFormScriptRunnerPrivate::initializeEngine(QWidget *w, const WidgetList &children, QScriptEngine &scriptEngine) {
// Populate the script variables. This pushes a context which must be popped.
QScriptContext *ctx = scriptEngine.pushContext();
QScriptValue widgetObject = scriptEngine.newQObject(w);
QScriptValue childrenArray = scriptEngine.newArray (children.size());
for(int i = 0; i < children.size(); i++) {
childrenArray.setProperty(i, scriptEngine.newQObject(children[i]));
}
const QFormBuilderStrings &strings = QFormBuilderStrings::instance();
ctx ->activationObject().setProperty(strings.scriptWidgetVariable, widgetObject);
ctx ->activationObject().setProperty(strings.scriptChildWidgetsVariable, childrenArray);
}
QString QFormScriptRunner::QFormScriptRunnerPrivate::engineError(QScriptEngine &scriptEngine) {
QScriptValue error = scriptEngine.evaluate(QLatin1String("Error"));
if (error.isValid())
return error.toString();
return QCoreApplication::tr("Unknown error");
}
// -- QFormScriptRunner
QFormScriptRunner::QFormScriptRunner() : m_impl(new QFormScriptRunnerPrivate)
{
}
QFormScriptRunner::~QFormScriptRunner()
{
delete m_impl;
}
bool QFormScriptRunner::run(const DomWidget *domWidget,
const QString &customWidgetScript,
QWidget *widget, const WidgetList &children,
QString *errorMessage)
{
typedef QList<DomScript*> DomScripts;
const Options scriptOptions = m_impl->options();
if (scriptOptions & DisableScripts)
return true;
// get list
const DomScripts domScripts = domWidget->elementScript();
// Concatenate snippets, starting with custom widget script
QString script = customWidgetScript;
if (script.isEmpty() && domScripts.empty())
return true;
foreach (const DomScript *scriptSnippet, domScripts) {
// Ensure new line
if (!script.isEmpty() && !script.endsWith(QLatin1Char('\n')))
script += QLatin1Char('\n');
script += scriptSnippet->text();
}
if (script.isEmpty())
return true;
const bool rc = m_impl->run(script, widget, children, errorMessage);
if (debugFormScriptRunner) {
qDebug() << "For " << widget << " with " << children.size() << " children, ran: " << script;
if (!rc)
qDebug() << *errorMessage;
}
if (!rc) {
if (!(scriptOptions & DisableWarnings)) {
const QString message = QCoreApplication::tr("An error occurred while running the script for %1: %2\nScript: %3").
arg(widget->objectName()).arg(*errorMessage).arg(script);
qWarning() << message;
}
}
return rc;
}
QFormScriptRunner::Options QFormScriptRunner::options() const
{
return m_impl->options();
}
void QFormScriptRunner::setOptions(Options options)
{
m_impl->setOptions(options);
}
QFormScriptRunner::Errors QFormScriptRunner::errors() const
{
return m_impl->errors();
}
void QFormScriptRunner::clearErrors()
{
m_impl->clearErrors();
}
#ifdef QFORMINTERNAL_NAMESPACE
} // namespace QFormInternal
#endif
QT_END_NAMESPACE
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