We need it for caching icons

akonadi-contact/src/CMakeLists.txt

@@ -37,6 +37,7 @@ set(akonadicontact_addresslocation_editor_SRCS
    editor/addresseditor/addresseslocationviewer.cpp
    editor/addresseditor/addresseslocationgrantleeformater.cpp
    editor/addresseditor/addressgrantleeobject.cpp
+   editor/addresseditor/iconnamecache.cpp
 )
 
 set(akonadicontact_editor_SRCS

akonadi-contact/src/editor/addresseditor/iconnamecache.cpp

+/* Copyright 2009 Thomas McGuire <mcguire@kde.org>
+
+   This library is free software; you can redistribute it and/or modify
+   it under the terms of the GNU Library General Public License as published
+   by the Free Software Foundation; either version 2 of the License or
+   ( at your option ) version 3 or, at the discretion of KDE e.V.
+   ( which shall act as a proxy as in section 14 of the GPLv3 ), any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+#include "iconnamecache_p.h"
+
+#include <KIconLoader>
+
+Q_GLOBAL_STATIC(IconNameCache, s_iconNameCache)
+
+IconNameCache *IconNameCache::instance()
+{
+    return s_iconNameCache;
+}
+
+bool IconNameCache::Entry::operator < (const Entry &other) const
+{
+    const int fileNameCompare = fileName.compare(other.fileName);
+    if (fileNameCompare != 0) {
+        return fileNameCompare < 0;
+    } else {
+        return size < other.size;
+    }
+}
+
+QString IconNameCache::iconPath(const QString &name, int size) const
+{
+    Entry entry;
+    entry.fileName = name;
+    entry.size = size;
+
+    if (mCachedEntries.contains(entry)) {
+        return mCachedEntries.value(entry);
+    }
+
+    const QString fileName = KIconLoader::global()->iconPath(name, size);
+    mCachedEntries.insert(entry, fileName);
+    return fileName;
+}

akonadi-contact/src/editor/addresseditor/iconnamecache_p.h

+/* Copyright 2009 Thomas McGuire <mcguire@kde.org>
+
+   This library is free software; you can redistribute it and/or modify
+   it under the terms of the GNU Library General Public License as published
+   by the Free Software Foundation; either version 2 of the License or
+   ( at your option ) version 3 or, at the discretion of KDE e.V.
+   ( which shall act as a proxy as in section 14 of the GPLv3 ), any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+#ifndef ICONNAMECACHE_H
+#define ICONNAMECACHE_H
+
+#include <QMap>
+#include <QString>
+/**
+ * This class is a replacement for KIconLoader::iconPath(), because the iconPath()
+ * function can be slow for non-existing icons or icons that fall back to a generic icon.
+ * Reason is that KIconLoader does slow system calls for finding the icons.
+ *
+ * The IconNameCache caches the result of iconPath() in a map and solves the slowness.
+ */
+class IconNameCache
+{
+public:
+
+    static IconNameCache *instance();
+    QString iconPath(const QString &name, int size) const;
+
+private:
+
+    class Entry
+    {
+    public:
+        QString fileName;
+        int size;
+
+        bool operator < (const Entry &other) const;
+    };
+
+    mutable QMap<Entry, QString> mCachedEntries;
+};
+
+#endif