//! # Example: special characters
//!
//! This example demonstrates support for carriage return, non-breaking space and zero-width space
//! characters to modify text layout behaviour.

use embedded_graphics::{
    mono_font::{ascii::FONT_6X10, MonoTextStyleBuilder},
    pixelcolor::BinaryColor,
    prelude::*,
    primitives::Rectangle,
};
use embedded_graphics_simulator::{
    BinaryColorTheme, OutputSettingsBuilder, SimulatorDisplay, Window,
};
use embedded_text::{
    alignment::HorizontalAlignment,
    style::{HeightMode, TextBoxStyleBuilder},
    TextBox,
};

fn main() {
    // Example text sprinkled with special characters. Note that the first "supports" word will not
    // be displayed because it will be overdrawn by the carriage return.
    let text = "Hello, World!\n\
    embedded-text supports\rcarriage return.\n\
    Non-breaking spaces\u{A0}are also supported.\n\
    Also\u{200B}supports\u{200B}Zero\u{200B}Width\u{200B}Spaces \
    as well as so\u{AD}ft hy\u{AD}phens";

    // Specify the styling options:
    // * Use the 6x10 MonoFont from embedded-graphics.
    // * Draw the text fully justified.
    // * Use `FitToText` height mode to stretch the text box to the exact height of the text.
    // * Draw the text with `BinaryColor::On`, which will be displayed as light blue.
    // * Draw the text with `BinaryColor::Off` background color, which will be rendered as dark
    //   blue. This is used to overwrite parts of the text in this example.
    let character_style = MonoTextStyleBuilder::new()
        .font(&FONT_6X10)
        .text_color(BinaryColor::On)
        .background_color(BinaryColor::Off)
        .build();

    let textbox_style = TextBoxStyleBuilder::new()
        .alignment(HorizontalAlignment::Justified)
        .height_mode(HeightMode::FitToText)
        .build();

    // Specify the bounding box. Note the 0px height. The `FitToText` height mode will
    // measure and adjust the height of the text box in `into_styled()`.
    let bounds = Rectangle::new(Point::zero(), Size::new(129, 0));

    // Create the text box and apply styling options.
    let text_box = TextBox::with_textbox_style(text, bounds, character_style, textbox_style);

    // Create a simulated display with the dimensions of the text box.
    let mut display = SimulatorDisplay::new(text_box.bounding_box().size);

    // Draw the text box.
    text_box.draw(&mut display).unwrap();

    // Set up the window and show the display's contents.
    let output_settings = OutputSettingsBuilder::new()
        .theme(BinaryColorTheme::OledBlue)
        .scale(2)
        .build();
    Window::new("Special characters demonstration", &output_settings).show_static(&display);
}