114 lines
3.5 KiB
Rust
114 lines
3.5 KiB
Rust
use termion::{clear, cursor};
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const ESTIMATED_FRAME_BIT_SIZE: usize = 11;
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use std::io::Write;
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use super::theme::Theme;
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const FRAME_CHAR_HORIZONTAL: char = 'h';
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const FRAME_CHAR_VERTICAL: char = 'v';
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pub enum FrameSize {
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ByAbsolute(u16, u16),
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ByPercent(u16, u16),
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}
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#[derive(Debug, Clone, Copy)]
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pub struct Frame {
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// Both are (w, h)
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start: (u16, u16),
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end: (u16, u16),
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}
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impl Frame {
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#[inline]
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pub fn goto(&self, x: u16, y: u16) -> String {
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let cg = cursor::Goto(
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(self.start.0 + x).min(self.end.0 - 1),
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(self.start.1 + y).min(self.end.1 - 1),
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);
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cg.into()
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}
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pub fn writeln(&self, s: &str, x: u16, y: u16) -> String {
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let words = s.split('\n').collect::<Vec<&str>>();
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let mut out_words = Vec::with_capacity(words.len());
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for i in 0..words.len() {
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out_words.push(format!(
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"{str}{ret}",
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str = words[i],
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ret = self.goto(1, y + i as u16 + 1)
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));
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}
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out_words.concat()
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}
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#[inline]
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pub fn size(&self) -> (u16, u16) {
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(self.end.0 - self.start.0, self.end.1 - self.start.1)
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}
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pub fn from_terminal_size() -> Result<Self, anyhow::Error> {
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let term = termion::terminal_size()?;
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// Swap term dimensions to use x/y
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let term = (term.1, term.0);
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Ok(Self::from_bottom_right(term, term))
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}
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fn from_bottom_right((pos_h, pos_w): (u16, u16), (term_h, term_w): (u16, u16)) -> Self {
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Self {
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start: (1.max(term_w - pos_w), 1.max(term_h - pos_h)),
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end: (pos_w, pos_h),
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}
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}
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pub fn frame_str(&self, theme: &Theme, body_theme: String) -> String {
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self.goto(0, 0);
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let (w_len, h_len) = self.size();
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let width_str = FRAME_CHAR_HORIZONTAL.to_string().repeat(w_len as usize + 1);
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let mut frame = Vec::with_capacity(h_len as usize + 4);
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let frame_theme = theme.frame();
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let body_clear = body_theme.clone() + &clear::CurrentLine.to_string();
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frame.push(frame_theme.clone());
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let make_line =
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|y: u16| format!("{left}{}", width_str, left = cursor::Goto(self.start.0, y));
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frame.push(make_line(self.start.1));
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for y in self.start.1 + 1..self.end.1 {
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frame.push(format!(
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"{left}{body_clear}{frame_theme}{char}{right}{char}",
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body_clear = &body_clear,
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frame_theme = &frame_theme,
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left = cursor::Goto(self.start.0, y),
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right = cursor::Goto(self.start.0 + self.end.0, y),
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char = FRAME_CHAR_VERTICAL,
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));
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}
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frame.push(make_line(self.end.1));
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frame.push(self.goto(1, 1));
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frame.push(body_theme);
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frame.concat()
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}
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}
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impl FrameSize {
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fn abs_size(&self) -> Frame {
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let (term_height, term_width) =
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termion::terminal_size().expect("could not get terminal size");
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let pos = match self {
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FrameSize::ByAbsolute(h, w) => ((*h).min(term_height), (*w).min(term_width)),
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FrameSize::ByPercent(h, w) => {
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// term_height = 100%
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// x = h%
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//
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// term_height * h / 100 = x
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(
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term_height * (*h).min(100) / 100,
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term_width * (*w).min(100) / 100,
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)
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}
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};
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Frame::from_bottom_right(pos, (term_height, term_width))
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}
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}
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