File indexing completed on 2024-05-19 05:05:44

0001 /***************************************************************************
0002  *   SPDX-License-Identifier: GPL-2.0-or-later
0003  *                                                                         *
0004  *   SPDX-FileCopyrightText: 2004-2019 Thomas Fischer <fischer@unix-ag.uni-kl.de>
0005  *                                                                         *
0006  *   This program is free software; you can redistribute it and/or modify  *
0007  *   it under the terms of the GNU General Public License as published by  *
0008  *   the Free Software Foundation; either version 2 of the License, or     *
0009  *   (at your option) any later version.                                   *
0010  *                                                                         *
0011  *   This program is distributed in the hope that it will be useful,       *
0012  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
0013  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
0014  *   GNU General Public License for more details.                          *
0015  *                                                                         *
0016  *   You should have received a copy of the GNU General Public License     *
0017  *   along with this program; if not, see <https://www.gnu.org/licenses/>. *
0018  ***************************************************************************/
0019 
0020 #ifndef KBIBTEX_NETWORKING_FAVICONLOCATOR_H
0021 #define KBIBTEX_NETWORKING_FAVICONLOCATOR_H
0022 
0023 #include <QObject>
0024 #include <QIcon>
0025 #include <QUrl>
0026 
0027 /**
0028  * This class tries to locate and download the favicon for a given
0029  * webpage. Upon success, a signal will be triggered.
0030  * At any point in time, the icon can be queried using a function,
0031  * but as long as no specific favicon got retrieved, this function
0032  * will return a generic icon only.
0033  * Favicons located once will be cached on a per-application base.
0034  *
0035  * @author Thomas Fischer <fischer@unix-ag.uni-kl.de>
0036  */
0037 class FavIconLocator : public QObject
0038 {
0039     Q_OBJECT
0040 public:
0041     /**
0042      * Start searching for a favicon belonging to a given webpage.
0043      * Search will run asynchronous, its end is signalled with
0044      * @see gotIcon().
0045      * @param webpageUrl Webpage where to search for a favicon
0046      * @param parent QObject-based parent of this object
0047      */
0048     explicit FavIconLocator(const QUrl &webpageUrl, QObject *parent);
0049 
0050     /**
0051      * Icon know for the webpage this specific object was created
0052      * for. In case no favicon has been downloaded yet (still in
0053      * progress or download failed), then a generic icon will be
0054      * returned.
0055      *
0056      * @return Either the webpage's favicon or a generic icon
0057      */
0058     QIcon icon() const;
0059 
0060 Q_SIGNALS:
0061     /**
0062      * Asynchronous search for a favicon concluded either with the
0063      * retrieved favicon or, in case of any failure, a generic icon.
0064      */
0065     void gotIcon(QIcon);
0066 
0067 private:
0068     QIcon favIcon;
0069 };
0070 
0071 #endif // KBIBTEX_NETWORKING_FAVICONLOCATOR_H