ShotList.cpp

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/*
 * Hydrogen
 * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.sourceforge.net]
 * Copyright(c) 2008-2024 The hydrogen development team [hydrogen-devel@lists.sourceforge.net]
 *
 * http://www.hydrogen-music.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY, without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see https://www.gnu.org/licenses
 *
 */
 
#include <core/Hydrogen.h>
#include <core/EventQueue.h>
 
#include "ShotList.h"
#include "HydrogenApp.h"
 
ShotList::ShotList( QString sShotsFilename ) {
        QFile shots( sShotsFilename );
        m_nNextShot = 0;
        
        if ( ! shots.open( QIODevice::ReadOnly ) ) {
                ___ERRORLOG( QString( "Cannot open shot list file '%1' " ).arg( shots.fileName() ) );
                return;
        }
        while (! shots.atEnd() ) {
                m_shots << shots.readLine();
        }
 
        HydrogenApp::get_instance()->addEventListener( this );
}
 
ShotList::ShotList( QStringList shots ) {
        m_shots = shots;
 
        HydrogenApp::get_instance()->addEventListener( this );
}
 
ShotList::~ShotList() {
        if ( auto pHydrogenApp = HydrogenApp::get_instance() ) {
                pHydrogenApp->removeEventListener( this );
        }
}
 
QWidget *ShotList::findWidgetInheriting( QObject *pObject, QString &sName ) {
        if ( pObject->inherits( sName.toLocal8Bit().data() ) ) {
                return dynamic_cast< QWidget *>( pObject );
        }
        for ( QObject *pC : pObject->children() ) {
                QWidget *pW = findWidgetInheriting( pC, sName );
                if ( pW ) {
                        return pW;
                }
        }
        return nullptr;
}
 
QWidget *ShotList::findWidget( QString &sName ) {
        for ( QWidget * pTop : QApplication::topLevelWidgets() ) {
 
                QWidget *pWidget = pTop->findChild< QWidget *>( sName );
                if ( !pWidget && pTop->objectName() == sName ) {
                        pWidget = dynamic_cast< QWidget *>( pTop );
                }
                if ( !pWidget ) {
                        pWidget = findWidgetInheriting( pTop, sName );
                }
                if ( pWidget ) {
                        return pWidget;
                }
        }
        return nullptr;
}
 
void ShotList::shoot( QString s ) {
        ___INFOLOG( QString( "Taking shot: %1" ).arg( s.trimmed() ) );
        QStringList words = s.trimmed().split( QRegExp( "\\s+" ) );
        if ( s.size() == 0 ) {
                return;
        }
        QString sCmd = words[ 0 ];
 
        if ( sCmd.startsWith( "#" ) || sCmd == "" ) {
                // Empty line or "#" to start a comment
        } else if ( sCmd.compare( "fin", Qt::CaseInsensitive) == 0 ) {
                // Finish the shot list and quit Hydrogen
 
                // Since the shot lists do also toggle some buttons that mark
                // the overall song modified, we need to discard the flag in
                // order to avoid a popup dialog.
                H2Core::Hydrogen::get_instance()->setIsModified( false );
                
                QTimer::singleShot( 1, QApplication::instance(), &QApplication::closeAllWindows );
        } else if ( sCmd.compare( "dump", Qt::CaseInsensitive) == 0 ) {
                // Dump object tree for debugging
                for ( QWidget *pTop : QApplication::topLevelWidgets() ) {
                        pTop->dumpObjectTree();
                }
        } else if ( sCmd.compare( "grab", Qt::CaseInsensitive ) == 0 ) {
 
                if ( words.size() < 2 ) {
                        ___ERRORLOG( QString( "Syntax: grab <widget> [as <filename>] [size w d] [offset x y ]." ) );
                } else {
                        words.pop_front();
                        QString sWidgetName = words[0];
                        words.pop_front();
                        QRect rect( 0, 0, -1, -1 );
                        QString sFileName = QString( "%1.png" ).arg( sWidgetName );
                        while ( !words.empty() ) {
                                if ( words[0] == "as" ) {
                                        words.pop_front();
                                        if ( words.size() < 1 ) {
                                                ___ERRORLOG( QString( "Syntax: grab ... as <filename>" ) );
                                        } else {
                                                sFileName = words[0];
                                                words.pop_front();
                                        }
                                } else if ( words[0] == "size" ) {
                                        words.pop_front();
                                        if ( words.size() < 2 ) {
                                                ___ERRORLOG( QString( "Syntax: grab ... size <width> <height>" ) );
                                        } else {
                                                rect.setWidth( words[0].toInt() );
                                                rect.setHeight( words[1].toInt() );
                                                words.pop_front();
                                                words.pop_front();
                                        }
                                } else if ( words[0] == "offset" ) {
                                        words.pop_front();
                                        if ( words.size() < 2 ) {
                                                ___ERRORLOG( QString( "Syntax: grab ... offset <width> <height>" ) );
                                        } else {
                                                rect.setX( words[0].toInt() );
                                                rect.setY( words[1].toInt() );
                                                words.pop_front();
                                                words.pop_front();
                                        }
                                } else {
                                        ___ERRORLOG( QString( "Syntax: grab <widget> [as <filename>] [size w d] [offset x y ]."
                                                                                  " Unexpected '%1'" ).arg( words[0] ) );
                                        break;
                                }
                        }
 
                        QWidget *pWidget = findWidget( sWidgetName );
                        if ( pWidget ) {
                                QPixmap p = pWidget->grab();
                                QRect oldRect = rect;
                                // Scale 'rect' up to match device pixels of pixmap
                                rect = QRect( rect.topLeft() * p.devicePixelRatio(),
                                                          rect.size() * p.devicePixelRatio() );
                                if ( rect.width() <= 0 ) {
                                        rect.setWidth( p.rect().width() );
                                }
                                if ( rect.height() <= 0 ) {
                                        rect.setHeight( p.rect().height() );
                                }
                                QRect grabRect = rect.intersected( p.rect() );
                                p.copy( grabRect ).save( sFileName );
                                ___INFOLOG( QString( "Saved grabbed widget %1" ).arg( sFileName ) );
                        } else {
                                ___ERRORLOG( QString( "Couldn't find widget named '%1' to grab" ).arg( sWidgetName ) );
                        }
                }
 
        } else if ( sCmd.compare( "slot", Qt::CaseInsensitive ) == 0 ) {
 
                if ( words.size() >= 3 ) {
                        QString sWidgetName = words[ 1 ];
                        QString sMethodName = words[ 2 ];
                        QWidget *pWidget = findWidget( sWidgetName );
 
                        if ( pWidget ) {
                                ___INFOLOG( QString( "Invoking '%1' on '%2'" ).arg( sMethodName, sWidgetName ) );
                                bool bSuccess = false;
                                switch ( words.size() ) {
                                case 3:
                                        bSuccess = QMetaObject::invokeMethod( pWidget, sMethodName.toLocal8Bit().data(), Qt::DirectConnection );
                                        break;
                                case 4:
                                        bSuccess = QMetaObject::invokeMethod( pWidget, sMethodName.toLocal8Bit().data(), Qt::DirectConnection,
                                                                                                                  Arg( words[3] ) );
                                        break;
                                case 5:
                                        bSuccess = QMetaObject::invokeMethod( pWidget, sMethodName.toLocal8Bit().data(), Qt::DirectConnection,
                                                                                                                  Arg( words[3] ), Arg( words[4] ) );
                                        break;
                                case 6:
                                        bSuccess = QMetaObject::invokeMethod( pWidget, sMethodName.toLocal8Bit().data(), Qt::DirectConnection,
                                                                                                                  Arg( words[3] ), Arg( words[4] ), Arg( words[5] ) );
                                        break;
                                default:
                                        ___ERRORLOG( "Unsupported number of arguments in %0" );
                                }
 
                                if ( !bSuccess ) {
                                        ___ERRORLOG( QString( "Couldn't invoke '%1' on '%2'" )
                                                                 .arg( sMethodName, sWidgetName ) );
                                } else {
                                        ___INFOLOG( "OK" );
                                }
                        } else {
                                ___ERRORLOG( QString( "Couldn't find widget named '%1' to invoke '%2' on" )
                                                         .arg( sWidgetName, sMethodName ) );
                        }
                } else {
                        ___ERRORLOG( QString( "Syntax: slot <widget> <method> [args]" ) );
                }
        } else {
                ___ERRORLOG( QString("Unknown command '%1'").arg( sCmd ) );
        }
}
 
void ShotList::shoot() {
        m_nNextShot = 0;
        if ( m_shots.size() != 0 ) {
                nextShot();
        }
}
 
void ShotList::nextShotEvent() {
        QMetaObject::invokeMethod( this, "nextShot", Qt::QueuedConnection );
}
 
void ShotList::nextShot( void ) {
        if ( ( m_nNextShot + 1) < m_shots.size() ) {
                H2Core::EventQueue::get_instance()->push_event( H2Core::EVENT_NEXT_SHOT, 0 );
        }
        shoot( m_shots[ m_nNextShot++ ] );
}