util.h

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/

#pragma once

#include <QPoint>
#include <QPalette>
#include <QMimeData>
#include <QIODevice>
#include "guiconfig.h"

class QSize;
class QRect;
class QPixmap;
class QLabel;
class QColor;
class QWidget;
class QStyleOptionViewItem;

namespace LC::Util
{
    UTIL_GUI_API QLabel* ShowPixmapLabel (const QPixmap& pixmap, const QPoint& pos = QPoint ());

    UTIL_GUI_API QColor TintColors (const QColor& c1, const QColor& c2, double alpha = 0.5);

    UTIL_GUI_API QString ElideProgressBarText (const QString& text, const QStyleOptionViewItem& option);

    UTIL_GUI_API void TintPalette (QWidget *widget,
            const QColor& color,
            double alpha = 0.5,
            const QList<QPalette::ColorRole>& roles = { QPalette::ColorRole::Text, QPalette::ColorRole::WindowText });

    UTIL_GUI_API QString FormatName (const QString& name);

    UTIL_GUI_API QPixmap DrawOverlayText (QPixmap px, const QString& text, QFont font, const QPen& pen, const QBrush& brush);

    UTIL_GUI_API QIcon FixupTrayIcon (const QIcon& icon);

    struct FileDialogFilterEntry
    {
        QString Description_;
        QLatin1String Extension_;
    };

    UTIL_GUI_API QString MakeFileDialogFilter (std::initializer_list<FileDialogFilterEntry> entries);

    UTIL_GUI_API QString MakeFileDialogFilter (const QList<FileDialogFilterEntry>& entries);

    template<typename T>
    void Save2MimeData (QMimeData *mimeData, const QString& name, const T& t)
    {
        QByteArray infosData;
        QDataStream ostr { &infosData, QIODevice::WriteOnly };
        ostr << t;

        mimeData->setData (name, infosData);
    }
}

namespace LC
{
    // TODO make this consteval when clang will stop crashing on this being consteval
    constexpr QColor operator""_rgb (const char *str, std::size_t size)
    {
        if (size != 7)
            throw std::runtime_error { "invalid color size" };

        constexpr auto digit = [] (char digit)
        {
            if (digit >= '0' && digit <= '9')
                return digit - '0';
            if (digit >= 'a' && digit <= 'f')
                return digit - 'a' + 0xa;
            if (digit >= 'A' && digit <= 'F')
                return digit - 'A' + 0xa;

            throw std::runtime_error { "unable to parse" };
        };

        constexpr auto group = [digit] (const char *str)
        {
            return digit (str [0]) * 16 + digit (str [1]);
        };

        return QColor { group (str + 1), group (str + 3), group (str + 5) };
    }
}