QHexView.hpp

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/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2015 Victor Anjin <virinext@gmail.com>
 * Copyright (C) 2019 Soeren Apel <soeren@apelpie.net>
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2015
 *
 * 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.
 */

#ifndef PULSEVIEW_PV_VIEWS_DECODER_BINARY_QHEXVIEW_HPP
#define PULSEVIEW_PV_VIEWS_DECODER_BINARY_QHEXVIEW_HPP

#include <QAbstractScrollArea>

#include <pv/data/decodesignal.hpp>

using std::pair;
using std::size_t;
using pv::data::DecodeBinaryClass;
using pv::data::DecodeBinaryDataChunk;

class QHexView: public QAbstractScrollArea
{
    Q_OBJECT

public:
    enum Mode {
        ChunkedDataMode,    
        MemoryEmulationMode 
    };

public:
    QHexView(QWidget *parent = nullptr);

    void set_mode(Mode m);
    void set_data(const DecodeBinaryClass* data);

    /* Sets range of samples that are visible in the main view */
    void set_visible_sample_range(uint64_t start, uint64_t end);

    /* Sets sample whose associated data we should highlight */
    void set_highlighted_data_sample(uint64_t sample);

    unsigned int get_bytes_per_line() const;

    void clear();
    void showFromOffset(size_t offset);
    virtual QSizePolicy sizePolicy() const;

    pair<size_t, size_t> get_selection() const;

    size_t create_hex_line(size_t start, size_t end, QString* dest,
        bool with_offset=false, bool with_ascii=false);

protected:
    void initialize_byte_iterator(size_t offset);
    uint8_t get_next_byte(bool* is_new_chunk = nullptr);

    void paintEvent(QPaintEvent *event);
    void keyPressEvent(QKeyEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
    void mousePressEvent(QMouseEvent *event);

private:
    QSize getFullSize() const;
    void resetSelection();
    void resetSelection(int pos);
    void setSelection(int pos);
    void ensureVisible();
    void setCursorPos(int pos);
    size_t cursorPosFromMousePos(const QPoint &position);

private:
    Mode mode_;
    const DecodeBinaryClass* data_;
    size_t data_size_;

    size_t posAddr_, posHex_, posAscii_;
    size_t charWidth_, charHeight_;
    size_t selectBegin_, selectEnd_, selectInit_, cursorPos_;
    uint8_t address_digits_;

    size_t current_chunk_id_, current_chunk_offset_, current_offset_;
    DecodeBinaryDataChunk current_chunk_; // Cache locally so that we're not messed up when the vector is re-allocating its data
    uint64_t current_chunk_sample_, next_chunk_sample_;

    pair<uint64_t, uint64_t> visible_range_;
    uint64_t highlighted_sample_;

    vector<QColor> chunk_colors_;
    QColor visible_range_color_;
};

#endif // PULSEVIEW_PV_VIEWS_DECODER_BINARY_QHEXVIEW_HPP