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libfm-qt-packaging/src/cachedfoldermodel.cpp

68 lines
2.0 KiB

/*
* Copyright (C) 2013 - 2015 Hong Jen Yee (PCMan) <pcman.tw@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "cachedfoldermodel.h"
namespace Fm {
CachedFolderModel::CachedFolderModel(const std::shared_ptr<Fm::Folder>& folder):
FolderModel(),
refCount(1) {
FolderModel::setFolder(folder);
}
CachedFolderModel::~CachedFolderModel() {
// qDebug("delete CachedFolderModel");
}
CachedFolderModel* CachedFolderModel::modelFromFolder(const std::shared_ptr<Fm::Folder>& folder) {
QVariant cache = folder->property(cacheKey);
CachedFolderModel* model = cache.value<CachedFolderModel*>();
if(model) {
model->ref();
}
else {
model = new CachedFolderModel(folder);
cache = QVariant::fromValue(model);
folder->setProperty(cacheKey, cache);
}
return model;
}
CachedFolderModel* CachedFolderModel::modelFromPath(const Fm::FilePath& path) {
auto folder = Fm::Folder::fromPath(path);
if(folder) {
CachedFolderModel* model = modelFromFolder(folder);
return model;
}
return nullptr;
}
void CachedFolderModel::unref() {
// qDebug("unref cache");
--refCount;
if(refCount <= 0) {
folder()->setProperty(cacheKey, QVariant());
deleteLater();
}
}
} // namespace Fm