text_entry.h

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/*
    MIT License

    Copyright (c) 2025, Alexey Dynda

    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 _LCDGFX_TEXT_ENTRY_H_
#define _LCDGFX_TEXT_ENTRY_H_

#include "nano_gfx_types.h"
#include "canvas/point.h"
#include "canvas/rect.h"
#include "canvas/font.h"

class LcdGfxTextEntry
{
public:
    LcdGfxTextEntry(char *buffer, uint8_t maxLen, const NanoRect &rect,
                    const char *charset = " ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.,!?-_");

    void up();

    void down();

    void left();

    void right();

    void setCursor(uint8_t cursor);

    uint8_t getCursor() const
    {
        return m_cursor;
    }

    const char *getText() const
    {
        return m_buffer;
    }

    uint8_t getMaxLen() const
    {
        return m_maxLen;
    }

    template <typename D> void show(D &d)
    {
        updateSize(d);
        d.drawRect(m_rect);
        const lcduint_t fontH = d.getFont().getHeader().height;
        const lcduint_t fontW = d.getFont().getHeader().width;
        const lcdint_t baseX = m_rect.p1.x + 2;
        const lcdint_t baseY = m_rect.p1.y + (m_rect.height() - fontH) / 2;
        d.printFixed(baseX, baseY, m_buffer);
        const lcdint_t cursorX = baseX + (lcdint_t)m_cursor * (lcdint_t)fontW;
        const lcdint_t cursorY = baseY + (lcdint_t)fontH;
        d.drawHLine(cursorX, cursorY, cursorX + (lcdint_t)fontW - 2);
    }

    template <typename D> void updateSize(D &d)
    {
        if ( !m_rect.p2.x )
        {
            const lcduint_t fontH = d.getFont().getHeader().height;
            const lcduint_t fontW = d.getFont().getHeader().width;
            m_rect.p2.x = m_rect.p1.x + (lcdint_t)fontW * (lcdint_t)m_maxLen + 4 - 1;
            m_rect.p2.y = m_rect.p1.y + (lcdint_t)fontH + 4 - 1;
        }
    }

    const NanoRect &getRect() const
    {
        return m_rect;
    }

private:
    char *m_buffer;
    const char *m_charset;
    uint8_t m_charsetLen;
    uint8_t m_maxLen;
    uint8_t m_cursor = 0;
    NanoRect m_rect;

    uint8_t indexOfCurrentChar() const;
};

#endif