comparison recentfiles.cpp @ 63:2340b00561d2

* Add (but don't yet use) RecentFiles class to replace inline MRU logic

+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    EasyMercurial
+
+    Based on HgExplorer by Jari Korhonen
+    Copyright (c) 2010 Jari Korhonen
+    Copyright (c) 2010 Chris Cannam
+    Copyright (c) 2010 Queen Mary, University of London
+    
+    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 <QFileInfo>
+#include <QSettings>
+#include <QRegExp>
+
+RecentFiles::RecentFiles(QString settingsGroup, size_t maxCount,
+                         bool ignoreTemporaries) :
+    m_settingsGroup(settingsGroup),
+    m_maxCount(maxCount),
+    m_ignoreTemporaries(ignoreTemporaries)
+{
+    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();
+}
+
+QStringList
+RecentFiles::getRecent() const
+{
+    QStringList 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) {
+            if (!m_ignoreTemporaries) {
+                add(absPath);
+            }
+        } else {
+            add(absPath);
+        }
+    }
+}
+
+