use std::fmt;
use clap::ValueEnum;
use crate::duration::format_millis;
use crate::model::{TimerKind, TimerStatus, TimerView};
#[derive(Debug, Clone, Copy, Default, PartialEq, Eq, ValueEnum)]
pub enum DisplaySize {
#[default]
#[value(alias = "s", alias = "1")]
Small,
#[value(alias = "m", alias = "2")]
Medium,
#[value(alias = "l", alias = "3")]
Large,
#[value(alias = "xl", alias = "4")]
Xlarge,
}
impl DisplaySize {
pub fn from_config_value(value: &str) -> Option<Self> {
match value {
"small" => Some(Self::Small),
"medium" => Some(Self::Medium),
"large" => Some(Self::Large),
"xlarge" => Some(Self::Xlarge),
_ => None,
}
}
pub fn larger(self) -> Self {
match self {
Self::Small => Self::Medium,
Self::Medium => Self::Large,
Self::Large | Self::Xlarge => Self::Xlarge,
}
}
pub fn smaller(self) -> Self {
match self {
Self::Small | Self::Medium => Self::Small,
Self::Large => Self::Medium,
Self::Xlarge => Self::Large,
}
}
}
impl fmt::Display for DisplaySize {
fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
formatter.write_str(match self {
Self::Small => "small",
Self::Medium => "medium",
Self::Large => "large",
Self::Xlarge => "xlarge",
})
}
}
#[derive(Debug, PartialEq, Eq)]
pub struct RenderedFrame {
pub lines: Vec<String>,
pub effective_size: DisplaySize,
}
pub fn render_timer(
view: &TimerView,
requested_size: DisplaySize,
terminal_width: u16,
terminal_height: u16,
) -> RenderedFrame {
let width = usize::from(terminal_width.max(1));
let height = usize::from(terminal_height.max(1));
let mut effective_size = requested_size;
while effective_size != DisplaySize::Small {
let digits = render_digits(view, effective_size);
let digit_width = digits
.iter()
.map(|line| line.chars().count())
.max()
.unwrap_or(0);
if digit_width <= width && digits.len().saturating_add(2) <= height {
break;
}
effective_size = effective_size.smaller();
}
if effective_size == DisplaySize::Small {
return RenderedFrame {
lines: vec![truncate(&compact_line(view), width)],
effective_size,
};
}
let mut lines = render_digits(view, effective_size);
lines.push(metadata_line(view));
let size_description = if effective_size == requested_size {
effective_size.to_string()
} else {
format!("{effective_size}; requested {requested_size}")
};
lines.push(format!(
"Space pause | d detach | x stop | +/- size ({size_description})"
));
RenderedFrame {
lines: lines
.into_iter()
.map(|line| center(&truncate(&line, width), width))
.collect(),
effective_size,
}
}
pub fn compact_line(view: &TimerView) -> String {
let symbol = match view.status {
TimerStatus::Running if view.kind == TimerKind::Stopwatch => "⏱",
TimerStatus::Running => "⏳",
TimerStatus::Paused => "⏸",
TimerStatus::Done => "✓",
TimerStatus::Stopped | TimerStatus::Cancelled => "×",
};
let round_up = view.kind == TimerKind::Countdown && view.status.is_active();
let note = view
.note
.as_deref()
.map(|note| format!(" · {note}"))
.unwrap_or_default();
let paused = if view.status == TimerStatus::Paused {
" · paused"
} else {
""
};
format!(
"{symbol} {}{note}{paused} [#{}]",
format_millis(view.value_millis, round_up),
view.id
)
}
fn render_digits(view: &TimerView, size: DisplaySize) -> Vec<String> {
let round_up = view.kind == TimerKind::Countdown && view.status.is_active();
let time = format_millis(view.value_millis, round_up).to_string();
let (font, scale) = match size {
DisplaySize::Medium => (Font::Medium, 1),
DisplaySize::Large => (Font::Large, 1),
DisplaySize::Xlarge => (Font::Large, 2),
DisplaySize::Small => return vec![compact_line(view)],
};
render_text(&time, font, scale)
}
fn metadata_line(view: &TimerView) -> String {
let note = view
.note
.as_deref()
.map(|note| format!(" · {note}"))
.unwrap_or_default();
format!(
"{} #{} · {}{note}",
view.kind.as_str(),
view.id,
view.status.as_str()
)
}
#[derive(Clone, Copy)]
enum Font {
Medium,
Large,
}
fn render_text(text: &str, font: Font, scale: usize) -> Vec<String> {
let glyphs: Vec<Vec<&str>> = text
.chars()
.map(|character| pattern(font, character).split('/').collect())
.collect();
let height = glyphs.first().map(Vec::len).unwrap_or_default();
let separator = " ".repeat(scale);
let mut lines = Vec::with_capacity(height.saturating_mul(scale));
for row in 0..height {
let mut rendered = String::new();
for (index, glyph) in glyphs.iter().enumerate() {
if index > 0 {
rendered.push_str(&separator);
}
for pixel in glyph[row].chars() {
let cell = if pixel == '#' { '█' } else { ' ' };
for _ in 0..scale {
rendered.push(cell);
}
}
}
for _ in 0..scale {
lines.push(rendered.clone());
}
}
lines
}
fn pattern(font: Font, character: char) -> &'static str {
match (font, character) {
(Font::Medium, '0') => "###/# #/# #/# #/###",
(Font::Medium, '1') => " # /## / # / # /###",
(Font::Medium, '2') => "###/ #/###/# /###",
(Font::Medium, '3') => "###/ #/###/ #/###",
(Font::Medium, '4') => "# #/# #/###/ #/ #",
(Font::Medium, '5') => "###/# /###/ #/###",
(Font::Medium, '6') => "###/# /###/# #/###",
(Font::Medium, '7') => "###/ #/ #/ # / # ",
(Font::Medium, '8') => "###/# #/###/# #/###",
(Font::Medium, '9') => "###/# #/###/ #/###",
(Font::Medium, ':') => " /#/ /#/ ",
(Font::Large, '0') => " ### /# #/# #/# #/# #/# #/ ### ",
(Font::Large, '1') => " # / ## /# # / # / # / # /#####",
(Font::Large, '2') => " ### /# #/ #/ # / # / # /#####",
(Font::Large, '3') => "#### / #/ #/ ### / #/ #/#### ",
(Font::Large, '4') => "# #/# #/# #/#####/ #/ #/ #",
(Font::Large, '5') => "#####/# /# /#### / #/ #/#### ",
(Font::Large, '6') => " ### /# /# /#### /# #/# #/ ### ",
(Font::Large, '7') => "#####/ #/ # / # / # / # / # ",
(Font::Large, '8') => " ### /# #/# #/ ### /# #/# #/ ### ",
(Font::Large, '9') => " ### /# #/# #/ ####/ #/ #/ ### ",
(Font::Large, ':') => " /#/ / /#/ / ",
_ => unreachable!("timer display only renders digits and colons"),
}
}
fn truncate(value: &str, width: usize) -> String {
let length = value.chars().count();
if length <= width {
return value.to_owned();
}
if width == 0 {
return String::new();
}
if width == 1 {
return "…".to_owned();
}
let mut truncated: String = value.chars().take(width - 1).collect();
truncated.push('…');
truncated
}
fn center(value: &str, width: usize) -> String {
let length = value.chars().count();
format!("{}{}", " ".repeat(width.saturating_sub(length) / 2), value)
}
#[cfg(test)]
mod tests {
use super::*;
fn view() -> TimerView {
TimerView {
id: 11,
kind: TimerKind::Stopwatch,
status: TimerStatus::Running,
note: None,
value_millis: 12_000,
}
}
#[test]
fn size_aliases_and_steps_are_stable() {
assert_eq!(DisplaySize::Small.larger(), DisplaySize::Medium);
assert_eq!(DisplaySize::Medium.larger(), DisplaySize::Large);
assert_eq!(DisplaySize::Large.larger(), DisplaySize::Xlarge);
assert_eq!(DisplaySize::Xlarge.larger(), DisplaySize::Xlarge);
assert_eq!(DisplaySize::Xlarge.smaller(), DisplaySize::Large);
}
#[test]
fn renders_four_fixed_sizes() {
let small = render_timer(&view(), DisplaySize::Small, 120, 40);
let medium = render_timer(&view(), DisplaySize::Medium, 120, 40);
let large = render_timer(&view(), DisplaySize::Large, 120, 40);
let xlarge = render_timer(&view(), DisplaySize::Xlarge, 120, 40);
assert_eq!(small.lines.len(), 1);
assert_eq!(medium.lines.len(), 7);
assert_eq!(large.lines.len(), 9);
assert_eq!(xlarge.lines.len(), 16);
}
#[test]
fn all_font_glyphs_have_consistent_dimensions() {
for (font, expected_width, expected_height) in [(Font::Medium, 3, 5), (Font::Large, 5, 7)] {
for character in "0123456789".chars() {
let rows: Vec<_> = pattern(font, character).split('/').collect();
assert_eq!(rows.len(), expected_height, "glyph {character}");
assert!(
rows.iter().all(|row| row.chars().count() == expected_width),
"glyph {character}"
);
}
let colon: Vec<_> = pattern(font, ':').split('/').collect();
assert_eq!(colon.len(), expected_height);
assert!(colon.iter().all(|row| row.chars().count() == 1));
}
}
#[test]
fn falls_back_when_the_terminal_is_too_small() {
let frame = render_timer(&view(), DisplaySize::Xlarge, 45, 12);
assert_eq!(frame.effective_size, DisplaySize::Large);
assert!(frame.lines.iter().all(|line| line.chars().count() <= 45));
let tiny = render_timer(&view(), DisplaySize::Large, 20, 4);
assert_eq!(tiny.effective_size, DisplaySize::Small);
assert_eq!(tiny.lines.len(), 1);
}
}