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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 146 insertions, 0 deletions

diff --git a/src/linguist/linguist/recentfiles.cpp b/src/linguist/linguist/recentfiles.cpp
new file mode 100644
index 000000000..e1d79ce24
--- /dev/null
+++ b/src/linguist/linguist/recentfiles.cpp
@@ -0,0 +1,146 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Linguist of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "recentfiles.h"
+#include "globals.h"
+
+#include <QtCore/QDebug>
+#include <QtCore/QFileInfo>
+#include <QtCore/QSettings>
+#include <QtCore/QString>
+#include <QtCore/QStringList>
+
+QT_BEGIN_NAMESPACE
+
+static QString configKey()
+{
+    return settingPath("RecentlyOpenedFiles");
+}
+
+
+RecentFiles::RecentFiles(const int maxEntries)
+  : m_groupOpen(false),
+    m_clone1st(false),
+    m_maxEntries(maxEntries)
+{
+    m_timer.setSingleShot(true);
+    m_timer.setInterval(3 * 60 * 1000);
+    connect(&m_timer, SIGNAL(timeout()), SLOT(closeGroup()));
+}
+
+/*
+ * The logic is as follows:
+ * - The most recent (i.e., topmost) item can be open ("in flux")
+ * - The item is closed by either a timeout (3 min or so) or a
+ *   "terminal action" (e.g., closing all files)
+ * - While the item is open, modifications to the set of open files
+ *   will modify that item instead of creating new items
+ * - If the open item is modified to be equal to an existing item,
+ *   the existing item is deleted, but will be re-created when the
+ *   open item is modified even further
+ * Cases (actions in parentheses are no-ops):
+ * - identical to top item => (do nothing)
+ * - closed, new item => insert at top, (clear marker)
+ * - closed, existing item => move to top, mark for cloning
+ * - open, new item, not marked => replace top, (clear marker)
+ * - open, new item, marked => insert at top, clear marker
+ * - open, existing item, not marked => replace top, delete copy, mark for cloning
+ * - open, existing item, marked => insert at top, delete copy, (mark for cloning)
+ * - closing clears marker
+ */
+void RecentFiles::addFiles(const QStringList &names)
+{
+    if (m_strLists.isEmpty() || names != m_strLists.first()) {
+        if (m_groupOpen && !m_clone1st)
+            // Group being open implies at least one item in the list
+            m_strLists.removeFirst();
+        m_groupOpen = true;
+
+        // We do *not* sort the actual entries, as that would destroy the user's
+        // chosen arrangement. However, we do the searching on sorted lists, so
+        // we throw out (probably) obsolete arrangements.
+        QList<QStringList> sortedLists = m_strLists;
+        for (int i = 0; i < sortedLists.size(); ++i)
+            sortedLists[i].sort();
+        QStringList sortedNames = names;
+        sortedNames.sort();
+
+        int index = sortedLists.indexOf(sortedNames);
+        if (index >= 0) {
+            m_strLists.removeAt(index);
+            m_clone1st = true;
+        } else {
+            if (m_strLists.count() >= m_maxEntries)
+                m_strLists.removeLast();
+            m_clone1st = false;
+        }
+        m_strLists.prepend(names);
+    }
+    m_timer.start();
+}
+
+void RecentFiles::closeGroup()
+{
+    m_timer.stop();
+    m_groupOpen = false;
+}
+
+void RecentFiles::readConfig()
+{
+    m_strLists.clear();
+    QVariant val = QSettings().value(configKey());
+    if (val.type() == QVariant::StringList) // Backwards compat to Qt < 4.5
+        foreach (const QString &s, val.toStringList())
+            m_strLists << QStringList(QFileInfo(s).canonicalFilePath());
+    else
+        foreach (const QVariant &v, val.toList())
+            m_strLists << v.toStringList();
+}
+
+void RecentFiles::writeConfig() const
+{
+    QList<QVariant> vals;
+    foreach (const QStringList &sl, m_strLists)
+        vals << sl;
+    QSettings().setValue(configKey(), vals);
+}
+
+QT_END_NAMESPACE