transmission/qt/favicon.h

/*
 * This file Copyright (C) 2012-2014 Mnemosyne LLC
 *
 * It may be used under the GNU Public License v2 or v3 licenses,
 * or any future license endorsed by Mnemosyne LLC.
 *
 * $Id$
 */

#ifndef FAVICON_CACHE_H
#define FAVICON_CACHE_H

class QNetworkAccessManager;
class QNetworkReply;
class QUrl;

#include <QMap>
#include <QString>
#include <QObject>
#include <QPixmap>

class Favicons: public QObject
{
    Q_OBJECT;

  public:

    static QString getHost( const QUrl& url );

  public:

    Favicons();
    virtual ~Favicons();

    // returns a cached pixmap, or a NULL pixmap if there's no match in the cache
    QPixmap find (const QUrl& url);

    // returns a cached pixmap, or a NULL pixmap if there's no match in the cache
    QPixmap findFromHost (const QString& host);

    // this will emit a signal when (if) the icon becomes ready
    void add (const QUrl& url);

  signals:

    void pixmapReady (const QString& host);

  private:

    QNetworkAccessManager * myNAM;
    QMap<QString,QPixmap> myPixmaps;

    QString getCacheDir ();
    void ensureCacheDirHasBeenScanned ();

  private slots:

    void onRequestFinished (QNetworkReply * reply);
};

#endif