plugins/Unity/Indicators/unitymenumodelcache.cpp · unity8

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unity8/plugins/Unity/Indicators/unitymenumodelcache.cpp

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1/*

3 *

4 * This program is free software; you can redistribute it and/or modify

5 * it under the terms of the GNU Lesser General Public License as published by

6 * the Free Software Foundation; version 3.

7 *

8 * This program is distributed in the hope that it will be useful,

9 * but WITHOUT ANY WARRANTY; without even the implied warranty of

10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

11 * GNU Lesser General Public License for more details.

12 *

13 * You should have received a copy of the GNU Lesser General Public License

14 * along with this program. If not, see <http://www.gnu.org/licenses/>.

15 *

16 * Authors:

17 * Nick Dedekind <nick.dedekind@canonical.com>

18 */

20#include "unitymenumodelcache.h"

21#include <unitymenumodel.h>

23#include <QQmlEngine>

25QPointer<UnityMenuModelCache> UnityMenuModelCache::theCache = nullptr;

27UnityMenuModelCache* UnityMenuModelCache::singleton()

28{

29 if (theCache.isNull()) {

30 theCache = new UnityMenuModelCache();

31 }

32 return theCache.data();

33}

35UnityMenuModelCache::UnityMenuModelCache(QObject* parent)

36 : QObject(parent)

37{

38}

40QSharedPointer<UnityMenuModel> UnityMenuModelCache::model(const QByteArray& path)

41{

42 if (m_registry.contains(path))

43 return m_registry[path];

45 UnityMenuModel* model = new UnityMenuModel;

46 QQmlEngine::setObjectOwnership(model, QQmlEngine::CppOwnership);

48 QSharedPointer<UnityMenuModel> menuModel(model);

50 // Keep a shared pointer (rather than weak pointer which would cause the

51 // model to be deleted when all shared pointers we give out are deleted).

52 // We want to keep all models cached because when we switch indicator

53 // profiles, we will be switching paths often. And we want to keep the

54 // old model around, ready to be used. Otherwise the UI might momentarily

55 // wait as we populate the model from DBus yet again.

56 m_registry[path] = menuModel;

58 menuModel->setMenuObjectPath(path);

59 return menuModel;

60}

62bool UnityMenuModelCache::contains(const QByteArray& path)

63{

64 return m_registry.contains(path);

65}