bendns' repos / chess
online multiplayer chess game (note server currently down)
ofshex dumpascii
0000 89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 00 10 00 00 00 0c 04 03 00 00 00 99 c9 20 .PNG........IHDR................
0020 b2 00 00 00 03 73 42 49 54 08 08 08 db e1 4f e0 00 00 00 09 70 48 59 73 00 00 0d d7 00 00 0d d7 .....sBIT.....O.....pHYs........
0040 01 42 28 9b 78 00 00 00 19 74 45 58 74 53 6f 66 74 77 61 72 65 00 77 77 77 2e 69 6e 6b 73 63 61 .B(.x....tEXtSoftware.www.inksca
0060 70 65 2e 6f 72 67 9b ee 3c 1a 00 00 00 18 50 4c 54 45 ff ff ff 00 92 48 03 68 41 0c 0c 0c 0c 5c pe.org..<.....PLTE.....H.hA....\
0080 b4 c4 c4 c4 fc fc fc ff 90 37 d4 8b 51 d7 00 00 00 01 74 52 4e 53 00 40 e6 d8 66 00 00 00 33 49 [email protected]
00a0 44 41 54 08 5b 63 60 36 06 03 03 06 f3 72 30 28 c6 c2 30 4b 4b 4b 0d 4b 4b 4b 06 31 42 5c a1 0c DAT.[c`6.....r0(..0KKK.KKK.1B\..
00c0 88 88 a1 20 18 08 23 18 46 4a 60 a0 8c 60 c0 ac 00 00 5a 5d 19 5f 8c 3b 7f 0e 00 00 00 00 49 45 ......#.FJ`..`....Z]._.;......IE
00e0 4e 44 ae 42 60 82 ND.B`.
='n70' href='#n70'>70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 
use crate::{
    buffer::Buffer,
    layout::Alignment,
    text::{StyledGrapheme, Text},
    widgets::{
        reflow::{LineComposer, LineTruncator, WordWrapper},
        Block, Widget,
    },
};
use helix_core::unicode::width::UnicodeWidthStr;
use helix_view::graphics::{Rect, Style};
use std::iter;

fn get_line_offset(line_width: u16, text_area_width: u16, alignment: Alignment) -> u16 {
    match alignment {
        Alignment::Center => (text_area_width / 2).saturating_sub(line_width / 2),
        Alignment::Right => text_area_width.saturating_sub(line_width),
        Alignment::Left => 0,
    }
}

/// A widget to display some text.
///
/// # Examples
///
/// ```
/// # use helix_tui::text::{Text, Spans, Span};
/// # use helix_tui::widgets::{Block, Borders, Paragraph, Wrap};
/// # use helix_tui::layout::{Alignment};
/// # use helix_view::graphics::{Style, Color, Modifier};
/// let text = vec![
///     Spans::from(vec![
///         Span::raw("First"),
///         Span::styled("line",Style::default().add_modifier(Modifier::ITALIC)),
///         Span::raw("."),
///     ]),
///     Spans::from(Span::styled("Second line", Style::default().fg(Color::Red))),
/// ];
/// Paragraph::new(text)
///     .block(Block::default().title("Paragraph").borders(Borders::ALL))
///     .style(Style::default().fg(Color::White).bg(Color::Black))
///     .alignment(Alignment::Center)
///     .wrap(Wrap { trim: true });
/// ```
#[derive(Debug, Clone)]
pub struct Paragraph<'a> {
    /// A block to wrap the widget in
    block: Option<Block<'a>>,
    /// Widget style
    style: Style,
    /// How to wrap the text
    wrap: Option<Wrap>,
    /// The text to display
    text: Text<'a>,
    /// Scroll
    scroll: (u16, u16),
    /// Alignment of the text
    alignment: Alignment,
}

/// Describes how to wrap text across lines.
///
/// ## Examples
///
/// ```
/// # use helix_tui::widgets::{Paragraph, Wrap};
/// # use helix_tui::text::Text;
/// let bullet_points = Text::from(r#"Some indented points:
///     - First thing goes here and is long so that it wraps
///     - Here is another point that is long enough to wrap"#);
///
/// // With leading spaces trimmed (window width of 30 chars):
/// Paragraph::new(bullet_points.clone()).wrap(Wrap { trim: true });
/// // Some indented points:
/// // - First thing goes here and is
/// // long so that it wraps
/// // - Here is another point that
/// // is long enough to wrap
///
/// // But without trimming, indentation is preserved:
/// Paragraph::new(bullet_points).wrap(Wrap { trim: false });
/// // Some indented points:
/// //     - First thing goes here
/// // and is long so that it wraps
/// //     - Here is another point
/// // that is long enough to wrap
/// ```
#[derive(Debug, Clone, Copy)]
pub struct Wrap {
    /// Should leading whitespace be trimmed
    pub trim: bool,
}

impl<'a> Paragraph<'a> {
    pub fn new<T>(text: T) -> Paragraph<'a>
    where
        T: Into<Text<'a>>,
    {
        Paragraph {
            block: None,
            style: Default::default(),
            wrap: None,
            text: text.into(),
            scroll: (0, 0),
            alignment: Alignment::Left,
        }
    }

    pub fn block(mut self, block: Block<'a>) -> Paragraph<'a> {
        self.block = Some(block);
        self
    }

    pub fn style(mut self, style: Style) -> Paragraph<'a> {
        self.style = style;
        self
    }

    pub fn wrap(mut self, wrap: Wrap) -> Paragraph<'a> {
        self.wrap = Some(wrap);
        self
    }

    pub fn scroll(mut self, offset: (u16, u16)) -> Paragraph<'a> {
        self.scroll = offset;
        self
    }

    pub fn alignment(mut self, alignment: Alignment) -> Paragraph<'a> {
        self.alignment = alignment;
        self
    }
}

impl<'a> Widget for Paragraph<'a> {
    fn render(mut self, area: Rect, b