support non_date and millis options for Clock

src/app.rs

@@ -16,7 +16,14 @@ pub(crate) mod modes;
 #[derive(Debug, Subcommand)]
 pub(crate) enum Mode {
     /// The clock mode displays the current time, the default mode.
-    Clock,
+    Clock {
+        /// Do not show date
+        #[clap(short = 'D', long, takes_value = false)]
+        no_date: bool,
+        /// Show milliseconds
+        #[clap(short, long, takes_value = false)]
+        millis: bool,
+    },
     /// The timer mode displays the remaining time until the timer is finished.
     Timer {
         #[clap(short, long, value_parser = parse_duration, default_value = "5m")]
@@ -47,13 +54,17 @@ pub(crate) struct App {
 impl App {
     pub fn init_app(&mut self) {
         let style = Style::default().fg(self.color);
-        let mode = self.mode.as_ref().unwrap_or(&Mode::Clock);
+        let mode = self.mode.as_ref().unwrap_or(&Mode::Clock {
+            no_date: false,
+            millis: false,
+        });
         match mode {
-            Mode::Clock => {
+            Mode::Clock { no_date, millis } => {
                 self.clock = Some(Clock {
                     size: self.size,
                     style,
-                    long: false,
+                    show_date: !no_date.to_owned(),
+                    show_millis: millis.to_owned(),
                 });
             }
             Mode::Timer { duration } => {

src/app/modes/clock.rs

@@ -12,13 +12,14 @@ use tui::{
 pub(crate) struct Clock {
     pub size: u16,
     pub style: Style,
-    pub long: bool,
+    pub show_date: bool,
+    pub show_millis: bool,
 }
 
 impl Widget for &Clock {
     fn render(self, area: Rect, buf: &mut tui::buffer::Buffer) {
         let now = Local::now();
-        let time_str = if self.long {
+        let time_str = if self.show_millis {
             let mut str = now.format("%H:%M:%S%.3f").to_string();
             str.truncate(str.len() - 2);
             str
@@ -35,6 +36,8 @@ impl Widget for &Clock {
             height: min(text_size.0, area.height),
         };
         text.render(text_area, buf);
+
+        if self.show_date {
             let text = now.format("%Y-%m-%d %Z").to_string();
             let text_len = text.as_str().len() as u16;
             let paragrahp = Paragraph::new(Span::from(text)).style(Style::default());
@@ -48,3 +51,4 @@ impl Widget for &Clock {
             paragrahp.render(para_area, buf);
         }
     }
+}

src/main.rs

@@ -4,6 +4,7 @@ use std::{
     time::{Duration, Instant},
 };
 
+use app::Mode;
 use clap::Parser;
 use crossterm::{
     event::{self, Event, KeyCode},
@@ -59,7 +60,12 @@ fn main() -> Result<(), Box<dyn Error>> {
     let mut terminal = Terminal::new(backend)?;
 
     // create app and run it
-    let tick_rate = Duration::from_millis(100);
+    let low_rate = if let Some(Mode::Clock { millis, .. }) = app.mode {
+        !millis
+    } else {
+        false
+    };
+    let tick_rate = Duration::from_millis(if low_rate { 20 } else { 200 });
     let res = run_app(&mut terminal, &mut app, tick_rate);
 
     // restore terminal