transmission/qt/Utils.h

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/*
* This file Copyright (C) 2009-2015 Mnemosyne LLC
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*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
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*
*/
#pragma once
#include <cctype> // isxdigit()
#include <functional>
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#include <QHash>
#include <QPointer>
#include <QRect>
#include <QString>
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class QAbstractItemView;
class QColor;
class QHeaderView;
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class QIcon;
class QModelIndex;
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#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
namespace std
{
template<>
struct hash<QString>
{
std::size_t operator()(QString const& s) const
{
return qHash(s);
}
};
} // namespace std
#endif
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class Utils
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{
public:
static QIcon getIconFromIndex(QModelIndex const& index);
static QString removeTrailingDirSeparator(QString const& path);
static void narrowRect(QRect& rect, int dx1, int dx2, Qt::LayoutDirection direction)
{
if (direction == Qt::RightToLeft)
{
qSwap(dx1, dx2);
}
rect.adjust(dx1, 0, -dx2, 0);
}
static int measureViewItem(QAbstractItemView const* view, QString const& text);
static int measureHeaderItem(QHeaderView const* view, QString const& text);
static QColor getFadedColor(QColor const& color);
template<typename DialogT, typename... ArgsT>
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static void openDialog(QPointer<DialogT>& dialog, ArgsT&&... args)
{
if (dialog.isNull())
{
dialog = new DialogT(std::forward<ArgsT>(args)...);
dialog->setAttribute(Qt::WA_DeleteOnClose);
dialog->show();
}
else
{
dialog->raise();
dialog->activateWindow();
}
}
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///
/// URLs
///
static bool isMagnetLink(QString const& s)
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{
return s.startsWith(QStringLiteral("magnet:?"));
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}
static bool isHexHashcode(QString const& s)
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{
if (s.length() != 40)
{
return false;
}
for (auto const& ch : s)
{
if (!isxdigit(ch.unicode()))
{
return false;
}
}
return true;
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}
static bool isUriWithSupportedScheme(QString const& s)
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{
return s.startsWith(QStringLiteral("ftp://")) || s.startsWith(QStringLiteral("http://")) ||
s.startsWith(QStringLiteral("https://"));
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}
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};