searchable_label.h

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// MIT License
//
// Copyright (c) 2019 Ruhr University Bochum, Chair for Embedded Security. All Rights reserved.
// Copyright (c) 2019 Marc Fyrbiak, Sebastian Wallat, Max Hoffmann ("ORIGINAL AUTHORS"). All rights reserved.
// Copyright (c) 2021 Max Planck Institute for Security and Privacy. All Rights reserved.
// Copyright (c) 2021 Jörn Langheinrich, Julian Speith, Nils Albartus, René Walendy, Simon Klix ("ORIGINAL AUTHORS"). All Rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
 
#pragma once
 
#include <QLabel>
#include <QList>
#include <QPair>
#include <QPainter>
 
class QFontMetrics;
 
namespace hal {
 
    class SearchableLabel : public QLabel
    {
        Q_OBJECT
    protected:
        void paintEvent(QPaintEvent* ev) override;
    public Q_SLOTS:
        void handleSearchChanged(const QString& string, int option);
    public:
        SearchableLabel(QWidget* parent = nullptr);
        SearchableLabel(const QString& txt, QWidget* parent = nullptr);
        bool hasMatch() const;
    private:
        void drawSubstring(QPainter& painter, int pos, int len, bool hilite);
        bool exactWordMatch(int pos, int len) const;
        QList<QPair<int,int> > mMatchPositions;
        QFontMetrics* mMetrics;
        int xText;
        int yText;
 
        static const int sHiliteOffset = 2;
    };
}