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https://github.com/transmission/transmission
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3e072f9bd4
* (C++) Macros should not be used to define constants * (C++) Memory should not be managed manually * (C++) "void*" should not be used in typedefs, member variables, function parameters or return type * (C++) When the "Rule-of-Zero" is not applicable, the "Rule-of-Five" should be followed * (C++) "switch" statements should have "default" clauses * (C++) "explicit" should be used on single-parameter constructors and conversiosn operators * (C++) Non-const global variables should not be used
61 lines
1.3 KiB
C++
61 lines
1.3 KiB
C++
/*
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* This file Copyright (C) 2012-2015 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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*
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*/
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#pragma once
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#include <unordered_map>
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#include <vector>
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#include <QObject>
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#include <QPixmap>
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#include <QString>
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#include <libtransmission/tr-macros.h>
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#include "Utils.h" // std::hash<QString>
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class QNetworkAccessManager;
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class QNetworkReply;
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class QUrl;
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class FaviconCache : public QObject
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{
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Q_OBJECT
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TR_DISABLE_COPY_MOVE(FaviconCache)
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public:
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FaviconCache();
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using Key = QString;
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using Keys = std::vector<Key>;
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// returns a cached pixmap, or a nullptr pixmap if there's no match in the cache
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QPixmap find(Key const& key);
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static Key getKey(QString const& display_name);
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// This will emit a signal when (if) the icon becomes ready.
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Key add(QString const& url);
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static QString getDisplayName(Key const& key);
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static QSize getIconSize();
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signals:
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void pixmapReady(Key const& key);
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private slots:
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void onRequestFinished(QNetworkReply* reply);
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private:
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static Key getKey(QUrl const& url);
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void ensureCacheDirHasBeenScanned();
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QNetworkAccessManager* nam_ = {};
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std::unordered_map<Key, QPixmap> pixmaps_;
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std::unordered_map<QString, Key> keys_;
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};
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