comparison data/fileio/RecentFiles.cpp @ 148:1a42221a1522

* Reorganising code base.  This revision will not compile.

+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    This file copyright 2006 Chris Cannam.
+    
+    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.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#include "RecentFiles.h"
+#include "ConfigFile.h"
+
+#include "base/Preferences.h"
+
+#include <QFileInfo>
+
+RecentFiles *
+RecentFiles::m_instance = 0;
+
+RecentFiles *
+RecentFiles::getInstance(int maxFileCount)
+{
+    if (!m_instance) {
+        m_instance = new RecentFiles(maxFileCount);
+    }
+    return m_instance;
+}
+
+RecentFiles::RecentFiles(int maxFileCount) :
+    m_maxFileCount(maxFileCount)
+{
+    readFiles();
+}
+
+RecentFiles::~RecentFiles()
+{
+    // nothing
+}
+
+void
+RecentFiles::readFiles()
+{
+    m_files.clear();
+    ConfigFile *cf = Preferences::getInstance()->getConfigFile();
+    for (unsigned int i = 0; i < 100; ++i) {
+        QString key = QString("recent-file-%1").arg(i);
+        QString filename = cf->get(key);
+        if (filename == "") break;
+        if (i < m_maxFileCount) m_files.push_back(filename);
+        else cf->set(key, "");
+    }
+    cf->commit();
+}
+
+void
+RecentFiles::writeFiles()
+{
+    ConfigFile *cf = Preferences::getInstance()->getConfigFile();
+    for (unsigned int i = 0; i < m_maxFileCount; ++i) {
+        QString key = QString("recent-file-%1").arg(i);
+        QString filename = "";
+        if (i < m_files.size()) filename = m_files[i];
+        cf->set(key, filename);
+    }
+    cf->commit();
+}
+
+void
+RecentFiles::truncateAndWrite()
+{
+    while (m_files.size() > m_maxFileCount) {
+        m_files.pop_back();
+    }
+    writeFiles();
+}
+
+std::vector<QString>
+RecentFiles::getRecentFiles() const
+{
+    std::vector<QString> files;
+    for (unsigned int i = 0; i < m_maxFileCount; ++i) {
+        if (i < m_files.size()) {
+            files.push_back(m_files[i]);
+        }
+    }
+    return files;
+}
+
+void
+RecentFiles::addFile(QString filename)
+{
+    filename = QFileInfo(filename).absoluteFilePath();
+
+    bool have = false;
+    for (unsigned int i = 0; i < m_files.size(); ++i) {
+        if (m_files[i] == filename) {
+            have = true;
+            break;
+        }
+    }
+    
+    if (!have) {
+        m_files.push_front(filename);
+    } else {
+        std::deque<QString> newfiles;
+        newfiles.push_back(filename);
+        for (unsigned int i = 0; i < m_files.size(); ++i) {
+            if (m_files[i] == filename) continue;
+            newfiles.push_back(m_files[i]);
+        }
+    }
+
+    truncateAndWrite();
+    emit recentFilesChanged();
+}
+
+