moved playlist formats support to plugins

git-svn-id: http://svn.code.sf.net/p/qmmp-dev/code/trunk/qmmp@397 90c681e8-e032-0410-971d-27865f9a5e38

5 files changed, 238 insertions, 11 deletions

diff --git a/src/qmmpui/CMakeLists.txt b/src/qmmpui/CMakeLists.txt
index 496ab8739..b9cc441a6 100644
--- a/src/qmmpui/CMakeLists.txt
+++ b/src/qmmpui/CMakeLists.txt
@@ -27,6 +27,7 @@ SET(libqmmpui_SRCS
     generalhandler.cpp
     songinfo.cpp
     control.cpp
+    playlistparser.cpp
 )
 
 SET(libqmmpui_MOC_HDRS
@@ -35,6 +36,8 @@ SET(libqmmpui_MOC_HDRS
     generalhandler.h
     songinfo.h
     control.h
+    playlistparser.h
+    playlistformat.h
 )
 
 QT4_WRAP_CPP(libqmmpui_MOC_SRCS ${libqmmpui_MOC_HDRS})
diff --git a/src/qmmpui/playlistformat.h b/src/qmmpui/playlistformat.h
new file mode 100644
index 000000000..0a5bfdbcc
--- /dev/null
+++ b/src/qmmpui/playlistformat.h
@@ -0,0 +1,67 @@
+/***************************************************************************
+ *   Copyright (C) 2006-2008 by Ilya Kotov                                 *
+ *   forkotov02@hotmail.ru                                                 *
+ *                                                                         *
+ *   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, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#ifndef _PALYLISTFORMAT_H
+#define _PALYLISTFORMAT_H
+#include <QStringList>
+
+
+class SongInfo;
+/*!
+ * Abstract interface for playlist formats.
+ *
+ * @author Vladimir Kuznetsov <vovanec@gmail.com>
+ */
+class PlaylistFormat
+{
+public:
+    virtual ~PlaylistFormat()
+    {
+        ;
+    }
+    /*!
+     * Takes raw contents of playlist file, should return string list of
+     * ready file pathes to fill the playlist.
+     */
+    virtual QStringList decode(const QString& contents) = 0;
+
+    /*!
+     * Takes the list of SongInfo objects, should return string of
+     * encoded playlist file
+     */
+    virtual QString encode(const QList<SongInfo*>& contents) = 0;
+
+    /*!
+     * Returns list of file extensions that current format supports
+     */
+    virtual QStringList getExtensions()const = 0;
+
+    /*!
+     * Verifies is the \b ext file extension supported by current playlist format.
+     */
+    virtual bool hasFormat(const QString& ext) = 0;
+
+    /// Unique name of playlist format.
+    virtual QString name()const = 0;
+};
+
+Q_DECLARE_INTERFACE(PlaylistFormat,"PlaylistFormatInterface/1.0");
+
+#endif
diff --git a/src/qmmpui/playlistparser.cpp b/src/qmmpui/playlistparser.cpp
new file mode 100644
index 000000000..45f14595d
--- /dev/null
+++ b/src/qmmpui/playlistparser.cpp
@@ -0,0 +1,101 @@
+/***************************************************************************
+ *   Copyright (C) 2008 by Ilya Kotov                                      *
+ *   forkotov02@hotmail.ru                                                 *
+ *                                                                         *
+ *   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, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#include <QtGui>
+#include <QObject>
+#include <QList>
+#include <QApplication>
+
+#include "playlistformat.h"
+#include "songinfo.h"
+#include "playlistparser.h"
+
+PlaylistParser *PlaylistParser::m_instance = 0;
+
+PlaylistParser::PlaylistParser(QObject *parent) : QObject (parent)
+{
+    m_instance = this;
+}
+
+PlaylistParser::~PlaylistParser()
+{}
+
+QStringList PlaylistParser::getExtensions()
+{
+    loadExternalPlaylistFormats();
+    QStringList extensions;
+    foreach(PlaylistFormat *format, m_formats)
+    extensions << format->getExtensions();
+    return extensions;
+}
+
+bool PlaylistParser::supports(const QString &filePath)
+{
+    return findByPath(filePath) != 0;
+}
+
+QList<PlaylistFormat*> PlaylistParser::formats()
+{
+    loadExternalPlaylistFormats();
+    return m_formats;
+}
+
+PlaylistFormat *PlaylistParser::findByPath(const QString &filePath)
+{
+    loadExternalPlaylistFormats();
+    foreach(PlaylistFormat* format, m_formats)
+    {
+        if (format->hasFormat(QFileInfo(filePath).suffix().toLower()))
+            return format;
+    }
+    return 0;
+}
+
+PlaylistParser* PlaylistParser::instance()
+{
+    if(!m_instance)
+        qFatal("PlaylistParser: object is not created");
+    return m_instance;
+}
+
+void PlaylistParser::loadExternalPlaylistFormats()
+{
+    if (!m_formats.isEmpty())
+        return;
+    QDir pluginsDir (qApp->applicationDirPath());
+    pluginsDir.cdUp();
+    pluginsDir.cd("./"LIB_DIR"/qmmp/PlaylistFormats");
+    foreach (QString fileName, pluginsDir.entryList(QDir::Files))
+    {
+        QPluginLoader loader(pluginsDir.absoluteFilePath(fileName));
+        QObject *plugin = loader.instance();
+        if (loader.isLoaded())
+            qDebug("PlaylistParser: plugin loaded - %s", qPrintable(fileName));
+        else
+            qWarning("PlaylistParser: %s", qPrintable(loader.errorString ()));
+
+        PlaylistFormat *fmt = 0;
+        if (plugin)
+            fmt = qobject_cast<PlaylistFormat *>(plugin);
+
+        if (fmt)
+            m_formats << fmt;
+    }
+}
diff --git a/src/qmmpui/playlistparser.h b/src/qmmpui/playlistparser.h
new file mode 100644
index 000000000..b2c5585ee
--- /dev/null
+++ b/src/qmmpui/playlistparser.h
@@ -0,0 +1,53 @@
+/***************************************************************************
+ *   Copyright (C) 2008 by Ilya Kotov                                      *
+ *   forkotov02@hotmail.ru                                                 *
+ *                                                                         *
+ *   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, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#ifndef PLAYLISTPARSER_H
+#define PLAYLISTPARSER_H
+
+#include <QObject>
+
+
+class SongInfo;
+class PlaylistFormat;
+
+/**
+	@author Ilya Kotov <forkotov02@hotmail.ru>
+*/
+class PlaylistParser  : public QObject
+{
+Q_OBJECT
+public:
+    PlaylistParser(QObject *parent);
+
+    ~PlaylistParser();
+
+    QStringList getExtensions();
+    bool supports(const QString &filePath);
+    QList<PlaylistFormat*> formats();
+    static PlaylistParser* instance();
+    PlaylistFormat *findByPath(const QString &filePath);
+
+private:
+    void loadExternalPlaylistFormats();
+    QList<PlaylistFormat*> m_formats;
+    static PlaylistParser* m_instance;
+
+};
+
+#endif
diff --git a/src/qmmpui/qmmpui.pro b/src/qmmpui/qmmpui.pro
index 8ed295534..2d09e43ae 100644
--- a/src/qmmpui/qmmpui.pro
+++ b/src/qmmpui/qmmpui.pro
@@ -7,19 +7,18 @@ qt \
 thread
 
 TEMPLATE = lib
-VERSION = $$QMMP_VERSION
 
-unix:isEmpty(LIB_DIR){
-    LIB_DIR = /lib
-}
+unix : isEmpty(LIB_DIR){
+        LIB_DIR = /lib
+    }
 
-unix:DEFINES += LIB_DIR=\\\"$$LIB_DIR\\\"
+unix : DEFINES += LIB_DIR=\\\"$$LIB_DIR\\\"
 
 DEFINES += QMMP_VERSION=$$QMMP_VERSION
-contains(CONFIG, SVN_VERSION) {
-DEFINES += QMMP_STR_VERSION=\\\"$$QMMP_VERSION-svn\\\"
-} else {
-DEFINES += QMMP_STR_VERSION=\\\"$$QMMP_VERSION\\\"
+contains(CONFIG, SVN_VERSION){
+    DEFINES += QMMP_STR_VERSION=\\\"$$QMMP_VERSION-svn\\\"
+}else {
+    DEFINES += QMMP_STR_VERSION=\\\"$$QMMP_VERSION\\\"
 }
 
 target.path = $$LIB_DIR
@@ -28,11 +27,15 @@ HEADERS += general.h \
            generalfactory.h \
            generalhandler.h \
            songinfo.h \
-           control.h
+           control.h \
+           playlistformat.h \
+ playlistparser.h
 SOURCES += general.cpp \
            generalhandler.cpp \
            songinfo.cpp \
-           control.cpp
+           control.cpp \
+ playlistparser.cpp
 
 DESTDIR = .
 
+