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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 QtSCriptTools 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 "qscriptdebuggerfrontend_p.h"
#include "qscriptdebuggerfrontend_p_p.h"
#include "qscriptdebuggercommand_p.h"
#include "qscriptdebuggerevent_p.h"
#include "qscriptdebuggerresponse_p.h"
#include "qscriptdebuggereventhandlerinterface_p.h"
#include "qscriptdebuggerresponsehandlerinterface_p.h"
#include <QtCore/qcoreevent.h>
#include <QtCore/qcoreapplication.h>
QT_BEGIN_NAMESPACE
/*!
\class QScriptDebuggerFrontend
\since 4.5
\internal
\brief The QScriptDebuggerFrontend class is the base class of debugger front-ends.
*/
// helper class that's used to handle our custom Qt events
class QScriptDebuggerFrontendEventReceiver : public QObject
{
public:
QScriptDebuggerFrontendEventReceiver(QScriptDebuggerFrontendPrivate *frontend,
QObject *parent = 0);
~QScriptDebuggerFrontendEventReceiver();
bool event(QEvent *);
private:
QScriptDebuggerFrontendPrivate *m_frontend;
};
QScriptDebuggerFrontendEventReceiver::QScriptDebuggerFrontendEventReceiver(
QScriptDebuggerFrontendPrivate *frontend, QObject *parent)
: QObject(parent), m_frontend(frontend)
{
}
QScriptDebuggerFrontendEventReceiver::~QScriptDebuggerFrontendEventReceiver()
{
}
bool QScriptDebuggerFrontendEventReceiver::event(QEvent *e)
{
return m_frontend->event(e);
}
QScriptDebuggerFrontendPrivate::QScriptDebuggerFrontendPrivate()
{
eventHandler = 0;
nextCommandId = 0;
eventReceiver = new QScriptDebuggerFrontendEventReceiver(this);
}
QScriptDebuggerFrontendPrivate::~QScriptDebuggerFrontendPrivate()
{
delete eventReceiver;
}
void QScriptDebuggerFrontendPrivate::postEvent(QEvent *e)
{
QCoreApplication::postEvent(eventReceiver, e);
}
bool QScriptDebuggerFrontendPrivate::event(QEvent *e)
{
Q_Q(QScriptDebuggerFrontend);
if (e->type() == QEvent::User+1) {
QScriptDebuggerEventEvent *de = static_cast<QScriptDebuggerEventEvent*>(e);
bool handled = q->notifyEvent(de->event());
if (handled) {
q->scheduleCommand(QScriptDebuggerCommand::resumeCommand(),
/*responseHandler=*/0);
}
return true;
} else if (e->type() == QEvent::User+2) {
processCommands();
return true;
}
return false;
}
void QScriptDebuggerFrontendPrivate::processCommands()
{
Q_Q(QScriptDebuggerFrontend);
while (!pendingCommands.isEmpty()) {
QScriptDebuggerCommand command(pendingCommands.takeFirst());
int id = pendingCommandIds.takeFirst();
q->processCommand(id, command);
}
}
QScriptDebuggerFrontend::QScriptDebuggerFrontend()
: d_ptr(new QScriptDebuggerFrontendPrivate())
{
d_ptr->q_ptr = this;
}
QScriptDebuggerFrontend::~QScriptDebuggerFrontend()
{
delete d_ptr;
}
QScriptDebuggerFrontend::QScriptDebuggerFrontend(QScriptDebuggerFrontendPrivate &dd)
: d_ptr(&dd)
{
d_ptr->q_ptr = this;
}
QScriptDebuggerEventHandlerInterface *QScriptDebuggerFrontend::eventHandler() const
{
Q_D(const QScriptDebuggerFrontend);
return d->eventHandler;
}
void QScriptDebuggerFrontend::setEventHandler(QScriptDebuggerEventHandlerInterface *eventHandler)
{
Q_D(QScriptDebuggerFrontend);
d->eventHandler = eventHandler;
}
/*!
Schedules the given \a command for execution by this front-end,
and returns a unique identifier associated with this command.
Subclasses can call this function to schedule custom commands.
\sa notifyCommandFinished()
*/
int QScriptDebuggerFrontend::scheduleCommand(
const QScriptDebuggerCommand &command,
QScriptDebuggerResponseHandlerInterface *responseHandler)
{
Q_D(QScriptDebuggerFrontend);
int id = ++d->nextCommandId;
d->pendingCommands.append(command);
d->pendingCommandIds.append(id);
if (responseHandler)
d->responseHandlers.insert(id, responseHandler);
if (d->pendingCommands.size() == 1) {
QEvent *e = new QEvent(QEvent::Type(QEvent::User+2)); // ProcessCommands
d->postEvent(e);
}
return id;
}
/*!
Subclasses should call this function when the command identified by
the given \a id has finished and produced the given \a response.
\sa processCommand(), notifyEvent()
*/
void QScriptDebuggerFrontend::notifyCommandFinished(int id, const QScriptDebuggerResponse &response)
{
Q_D(QScriptDebuggerFrontend);
if (d->responseHandlers.contains(id)) {
QScriptDebuggerResponseHandlerInterface *handler = d->responseHandlers.take(id);
Q_ASSERT(handler != 0);
handler->handleResponse(response, id);
}
}
/*!
Subclasses should call this function when the given \a event is
received from the back-end.
\sa notifyCommandFinished(), QScriptDebuggerBackend::event()
*/
bool QScriptDebuggerFrontend::notifyEvent(const QScriptDebuggerEvent &event)
{
Q_D(QScriptDebuggerFrontend);
if (d->eventHandler)
return d->eventHandler->debuggerEvent(event);
return false;
}
int QScriptDebuggerFrontend::scheduledCommandCount() const
{
Q_D(const QScriptDebuggerFrontend);
return d->nextCommandId;
}
/*!
\fn void QScriptDebuggerFrontend::processCommand(int id, const QScriptDebuggerCommand &command)
Subclasses must reimplement this function to process the given \a command
identified by \a id. Call notifyCommandFinished() when processing is
complete.
*/
QT_END_NAMESPACE
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