Qmmp
/usr/src/RPM/BUILD/qmmp-0.11-svn/src/qmmpui/metadataformatter.h
00001 /***************************************************************************
00002  *   Copyright (C) 2015 by Ilya Kotov                                      *
00003  *   forkotov02@hotmail.ru                                                 *
00004  *                                                                         *
00005  *   This program is free software; you can redistribute it and/or modify  *
00006  *   it under the terms of the GNU General Public License as published by  *
00007  *   the Free Software Foundation; either version 2 of the License, or     *
00008  *   (at your option) any later version.                                   *
00009  *                                                                         *
00010  *   This program is distributed in the hope that it will be useful,       *
00011  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00012  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
00013  *   GNU General Public License for more details.                          *
00014  *                                                                         *
00015  *   You should have received a copy of the GNU General Public License     *
00016  *   along with this program; if not, write to the                         *
00017  *   Free Software Foundation, Inc.,                                       *
00018  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
00019  ***************************************************************************/
00020 
00021 #ifndef METADATAFORMATTER_H
00022 #define METADATAFORMATTER_H
00023 
00024 #include <QString>
00025 #include <QMap>
00026 #include <QList>
00027 #include <qmmpui/playlisttrack.h>
00028 #include <qmmp/qmmp.h>
00029 
00033 class MetaDataFormatter
00034 {
00035 public:
00057     MetaDataFormatter(const QString &pattern = QString());
00062     void setPattern(const QString &pattern);
00066     const QString pattern() const;
00067 
00071     QString format(const PlayListTrack *item) const;
00078     QString format(const QMap<Qmmp::MetaData, QString> &metaData, qint64 length = 0, int track = 0) const;
00086     static QString formatLength(qint64 length, bool hideZero = true);
00087 
00088 private:
00089     struct Node;
00090     struct Param;
00091 
00092     struct Node
00093     {
00094         enum {
00095             PRINT_TEXT = 0,
00096             IF_KEYWORD,
00097             OR_OPERATOR,
00098             AND_OPERATOR
00099         } command;
00100 
00101         QList<Param> params;
00102     };
00103 
00104     struct Param
00105     {
00106         enum {
00107             FIELD = 0,
00108             TEXT,
00109             NODES
00110         } type;
00111 
00112         //extra fields
00113         enum
00114         {
00115             TWO_DIGIT_TRACK = Qmmp::URL + 1,
00116             DURATION,
00117             FILE_NAME,
00118             TRACK_INDEX
00119         };
00120 
00121         int field;
00122         QString text;
00123         QList<Node> children;
00124     };
00125 
00126     bool parseField(QList<Node> *nodes, QString::const_iterator *i, QString::const_iterator end);
00127     bool parseIf(QList<Node> *nodes, QString::const_iterator *i, QString::const_iterator end);
00128     void parseText(QList<Node> *nodes, QString::const_iterator *i, QString::const_iterator end);
00129     void parseEscape(QList<Node> *nodes, QString::const_iterator *i, QString::const_iterator end);
00130 
00131     QString evalute(const QList<Node> *nodes, const QMap<Qmmp::MetaData, QString> *metaData, qint64 length, int track) const;
00132     QString printParam(Param *p, const QMap<Qmmp::MetaData, QString> *metaData, qint64 length, int track) const;
00133     QString printField(int field, const QMap<Qmmp::MetaData, QString> *metaData, qint64 length, int track) const;
00134 
00135     QString dumpNode(Node node) const;
00136 
00137     QList<MetaDataFormatter::Node> compile(const QString &expr);
00138     QString m_pattern;
00139     QList<MetaDataFormatter::Node> m_nodes;
00140     QMap<QString, int> m_fieldNames;
00141 };
00142 
00143 #endif // METADATAFORMATTER2_H
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