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transmission/qt/IconCache.h

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/*
* This file Copyright (C) 2009-2015 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#pragma once
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#if !defined(_WIN32)
#include <unordered_set>
#endif
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#include <unordered_map>
#include <QFileIconProvider>
#include <QIcon>
#include <QString>
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#include "Utils.h" // std::hash<QString>()
#if defined(_WIN32)
class QFileInfo;
#endif
class QModelIndex;
class IconCache
{
public:
static IconCache& get();
QIcon folderIcon() const { return folder_icon_; }
QIcon fileIcon() const { return file_icon_; }
QIcon guessMimeIcon(QString const& filename, QIcon fallback = {}) const;
QIcon getMimeTypeIcon(QString const& mime_type, bool multifile) const;
protected:
IconCache() = default;
private:
QIcon const folder_icon_ = QFileIconProvider().icon(QFileIconProvider::Folder);
QIcon const file_icon_ = QFileIconProvider().icon(QFileIconProvider::File);
mutable std::unordered_map<QString, QIcon> name_to_icon_;
mutable std::unordered_map<QString, QIcon> name_to_emblem_icon_;
#if defined(_WIN32)
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void addAssociatedFileIcon(QFileInfo const& file_info, unsigned int icon_size, QIcon& icon) const;
#else
mutable std::unordered_set<QString> suffixes_;
mutable std::unordered_map<QString, QIcon> ext_to_icon_;
QIcon getMimeIcon(QString const& filename) const;
#endif
};