mplusfonts 0.3.4

use core::convert::Infallible;
use core::iter;

use embedded_graphics::pixelcolor::Rgb565;
use embedded_graphics::prelude::*;
use embedded_graphics::primitives::Rectangle;
use embedded_graphics_simulator::SimulatorEvent::{KeyDown, Quit};
use embedded_graphics_simulator::sdl2::Keycode;
use embedded_graphics_simulator::{OutputSettingsBuilder, SimulatorDisplay, Window};
use embedded_text::TextBox;
use embedded_text::alignment::HorizontalAlignment;
use embedded_text::style::TextBoxStyle;
use mplusfonts::mplus;
use mplusfonts::style::BitmapFontStyleBuilder;

/// Displays all 64 characters in the Block Elements Unicode block (plus shade and fill characters).
#[mplusfonts::strings]
pub fn main() -> Result<(), Infallible> {
    let mut display: SimulatorDisplay<Rgb565> = SimulatorDisplay::new(Size::new(240, 240));

    #[strings::emit]
    let bitmap_font = mplus!(code(100), 450, code_line_height(27), true, 1, 4);

    let builder = BitmapFontStyleBuilder::new().text_color(Rgb565::new(18, 56, 20));

    let text_rows = [
        "\u{A0} ▁▂▃▄▅▆▇█  ▁🭻🭺🭹🭸🭷🭶🭾",
        "\u{A0}   🮕🮕   ▉ 🭽  🮖🮖   🭵",
        "▕ ▛ ▀▀ ▜ ▊▕ ▝ 🮑🮑 ▘ 🭴",
        "🮇  ░▒▓🮐  ▋🭵 ▗ 🮏🮏 ▖ 🭳",
        "🮈 ▌░▒▓🮐🮔 ▌🭴 ▐ 🮌🮍 ▌ 🭲",
        "▐ ▌░▒▓🮐🮔 ▍🭳 ▐ 🮌🮍 ▌🮀🭱",
        "🮉  ░▒▓🮐  ▎🭲 ▝ 🮎🮎 ▘🯎🭰",
        "🮊 ▙ ▄▄ ▟ ▏🭱🮁▗ 🮒🮒 ▖🯏▏",
        "🮋   ▚▚    🭰🮗  ▞▞  🭿\u{A0}",
        "█🮆🮅🮄▀🮃🮂▔  🭼🭻🭺🭹🭸🭷🭶▔ \u{A0}",
        "\u{A0} ▁🭻🭺🭹🭸🭷🭶🭾  ▁▂▃▄▅▆▇█",
        "\u{A0}🭽  🮖🮖   🭵    🮕🮕   ▉",
        "▕ ▝ 🮑🮑 ▘ 🭴▕ ▛ ▀▀ ▜ ▊",
        "🭵 ▗ 🮏🮏 ▖ 🭳🮇  ░▒▓🮐  ▋",
        "🭴 ▐ 🮌🮍 ▌ 🭲🮈 ▌░▒▓🮐🮔 ▌",
        "🭳 ▐ 🮌🮍 ▌🮀🭱▐ ▌░▒▓🮐🮔 ▍",
        "🭲 ▝ 🮎🮎 ▘🯎🭰🮉  ░▒▓🮐  ▎",
        "🭱🮁▗ 🮒🮒 ▖🯏▏🮊 ▙ ▄▄ ▟ ▏",
        "🭰🮗  ▞▞  🭿 🮋   ▚▚   \u{A0}",
        "🭼🭻🭺🭹🭸🭷🭶▔  █🮆🮅🮄▀🮃🮂▔ \u{A0}",
    ];

    let output_settings = OutputSettingsBuilder::new()
        .scale(3)
        .pixel_spacing(1)
        .build();

    #[strings::skip]
    let mut window = Window::new("Simulator", &output_settings);

    let mut row_offset = 0;

    'running: loop {
        let text = String::from_iter(
            text_rows
                .into_iter()
                .cycle()
                .skip(row_offset)
                .take(8)
                .zip(iter::repeat("\n"))
                .map(|(string, newline)| [string, newline])
                .flatten(),
        );

        let textbox = TextBox::with_textbox_style(
            &text,
            Rectangle::new(Point::new(10, 12), Size::new(220, 216)),
            builder.clone().font(&bitmap_font).build(),
            TextBoxStyle::with_alignment(HorizontalAlignment::Center),
        );

        textbox.draw(&mut display)?;

        window.update(&display);

        let increment = 'waiting: loop {
            for event in window.events() {
                match event {
                    KeyDown {
                        keycode: Keycode::SPACE | Keycode::DOWN,
                        ..
                    } => break 'waiting 1,
                    KeyDown {
                        keycode: Keycode::BACKSPACE | Keycode::UP,
                        ..
                    } => break 'waiting text_rows.len() - 1,
                    KeyDown {
                        keycode: Keycode::PAGEDOWN,
                        ..
                    } => break 'waiting 10,
                    KeyDown {
                        keycode: Keycode::PAGEUP,
                        ..
                    } => break 'waiting text_rows.len() - 10,
                    Quit => break 'running Ok(()),
                    _ => continue 'waiting,
                }
            }
        };

        row_offset = row_offset.wrapping_add(increment) % text_rows.len();
    }
}