transmission/qt/FaviconCache.h

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/*
* This file Copyright (C) 2012-2015 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#pragma once
#include <unordered_map>
#include <QString>
#include <QObject>
#include <QPixmap>
#include <Utils.h> // std::hash<QString>
class QNetworkAccessManager;
class QNetworkReply;
class QUrl;
class FaviconCache : public QObject
{
Q_OBJECT
public:
FaviconCache();
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// returns a cached pixmap, or a NULL pixmap if there's no match in the cache
QPixmap find(QString const& key);
QPixmap find(QUrl const& url) { return find(getKey(url)); }
// This will emit a signal when (if) the icon becomes ready.
// Returns the key.
QString add(QUrl const& url);
static QString getDisplayName(QString const& key);
static QString getKey(QUrl const& url);
static QString getKey(QString const& display_name);
static QSize getIconSize();
signals:
void pixmapReady(QString const& key);
private:
QString getCacheDir();
void ensureCacheDirHasBeenScanned();
private slots:
void onRequestFinished(QNetworkReply* reply);
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private:
QNetworkAccessManager* nam_ = {};
std::unordered_map<QString, QPixmap> pixmaps_;
};