view base/RecentFiles.cpp @ 1833:21c792334c2e sensible-delimited-data-strings

Rewrite all the DelimitedDataString stuff so as to return vectors of individual cell strings rather than having the classes add the delimiters themselves. Rename accordingly to names based on StringExport. Take advantage of this in the CSV writer code so as to properly quote cells that contain delimiter characters.

/* -*- 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>
#include <QMutexLocker>

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

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

void
RecentFiles::read()
{
    // Private method - called only from constructor - no mutex lock required
    
    m_entries.clear();
    QSettings settings;
    settings.beginGroup(m_settingsGroup);

    for (int i = 0; i < 100; ++i) {

        QString idKey = QString("recent-%1").arg(i);
        QString identifier = settings.value(idKey, "").toString();
        if (identifier == "") break;

        QString labelKey = QString("recent-%1-label").arg(i);
        QString label = settings.value(labelKey, "").toString();
        
        if (i < m_maxCount) m_entries.push_back({ identifier, label });
        else {
            settings.setValue(idKey, "");
            settings.setValue(labelKey, "");
        }
    }

    settings.endGroup();
}

void
RecentFiles::write()
{
    // Private method - must be serialised at call site
    
    QSettings settings;
    settings.beginGroup(m_settingsGroup);

    for (int i = 0; i < m_maxCount; ++i) {
        QString idKey = QString("recent-%1").arg(i);
        QString labelKey = QString("recent-%1-label").arg(i);
        QString identifier;
        QString label;
        if (in_range_for(m_entries, i)) {
            identifier = m_entries[i].first;
            label = m_entries[i].second;
        }
        settings.setValue(idKey, identifier);
        settings.setValue(labelKey, label);
    }

    settings.endGroup();
}

void
RecentFiles::truncateAndWrite()
{
    // Private method - must be serialised at call site
    
    while (int(m_entries.size()) > m_maxCount) {
        m_entries.pop_back();
    }
    write();
}

std::vector<QString>
RecentFiles::getRecentIdentifiers() const
{
    QMutexLocker locker(&m_mutex);

    std::vector<QString> identifiers;
    for (int i = 0; i < m_maxCount; ++i) {
        if (i < (int)m_entries.size()) {
            identifiers.push_back(m_entries[i].first);
        }
    }
    
    return identifiers;
}

std::vector<std::pair<QString, QString>>
RecentFiles::getRecentEntries() const
{
    QMutexLocker locker(&m_mutex);

    std::vector<std::pair<QString, QString>> entries;
    for (int i = 0; i < m_maxCount; ++i) {
        if (i < (int)m_entries.size()) {
            entries.push_back(m_entries[i]);
        }
    }
    
    return entries;
}

void
RecentFiles::add(QString identifier, QString label)
{
    {
        QMutexLocker locker(&m_mutex);

        bool have = false;
        for (int i = 0; i < int(m_entries.size()); ++i) {
            if (m_entries[i].first == identifier) {
                have = true;
                break;
            }
        }
    
        if (!have) {
            m_entries.push_front({ identifier, label });
        } else {
            std::deque<std::pair<QString, QString>> newEntries;
            newEntries.push_back({ identifier, label });
            for (int i = 0; in_range_for(m_entries, i); ++i) {
                if (m_entries[i].first == identifier) continue;
                newEntries.push_back(m_entries[i]);
            }
            m_entries = newEntries;
        }

        truncateAndWrite();
    }
    
    emit recentChanged();
}

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