view base/RecentFiles.cpp @ 490:c3fb8258e34d

* Make it possible to import an entire session from an RDF document.
  However, at the moment the timings of events appear to be constrained
  by how far the audio decoder has got through its audio file at the
  time the event is queried -- need to investigate.

/* -*- 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 "Preferences.h"

#include <QFileInfo>
#include <QSettings>
#include <QRegExp>

RecentFiles::RecentFiles(QString settingsGroup, size_t maxCount) :
    m_settingsGroup(settingsGroup),
    m_maxCount(maxCount)
{
    read();
}

RecentFiles::~RecentFiles()
{
    // nothing
}

void
RecentFiles::read()
{
    m_names.clear();
    QSettings settings;
    settings.beginGroup(m_settingsGroup);

    for (size_t i = 0; i < 100; ++i) {
        QString key = QString("recent-%1").arg(i);
        QString name = settings.value(key, "").toString();
        if (name == "") break;
        if (i < m_maxCount) m_names.push_back(name);
        else settings.setValue(key, "");
    }

    settings.endGroup();
}

void
RecentFiles::write()
{
    QSettings settings;
    settings.beginGroup(m_settingsGroup);

    for (size_t i = 0; i < m_maxCount; ++i) {
        QString key = QString("recent-%1").arg(i);
        QString name = "";
        if (i < m_names.size()) name = m_names[i];
        settings.setValue(key, name);
    }

    settings.endGroup();
}

void
RecentFiles::truncateAndWrite()
{
    while (m_names.size() > m_maxCount) {
        m_names.pop_back();
    }
    write();
}

std::vector<QString>
RecentFiles::getRecent() const
{
    std::vector<QString> names;
    for (size_t i = 0; i < m_maxCount; ++i) {
        if (i < m_names.size()) {
            names.push_back(m_names[i]);
        }
    }
    return names;
}

void
RecentFiles::add(QString name)
{
    bool have = false;
    for (size_t i = 0; i < m_names.size(); ++i) {
        if (m_names[i] == name) {
            have = true;
            break;
        }
    }
    
    if (!have) {
        m_names.push_front(name);
    } else {
        std::deque<QString> newnames;
        newnames.push_back(name);
        for (size_t i = 0; i < m_names.size(); ++i) {
            if (m_names[i] == name) continue;
            newnames.push_back(m_names[i]);
        }
        m_names = newnames;
    }

    truncateAndWrite();
    emit recentChanged();
}

void
RecentFiles::addFile(QString name)
{
    static QRegExp schemeRE("^[a-zA-Z]{2,5}://");
    static QRegExp tempRE("[\\/][Tt]e?mp[\\/]");
    if (schemeRE.indexIn(name) == 0) {
        add(name);
    } else {
        QString absPath = QFileInfo(name).absoluteFilePath();
        if (tempRE.indexIn(absPath) != -1) {
            Preferences *prefs = Preferences::getInstance();
            if (prefs && !prefs->getOmitTempsFromRecentFiles()) {
                add(absPath);
            }
        } else {
            add(absPath);
        }
    }
}