feat(screen): LocalTime (#90)

src/app.rs

@@ -10,6 +10,7 @@ use crate::{
         countdown::{Countdown, CountdownState, CountdownStateArgs},
         footer::{Footer, FooterState},
         header::Header,
+        local_time::{LocalTimeState, LocalTimeStateArgs, LocalTimeWidget},
         pomodoro::{Mode as PomodoroMode, PomodoroState, PomodoroStateArgs, PomodoroWidget},
         timer::{Timer, TimerState},
     },
@@ -48,6 +49,7 @@ pub struct App {
     countdown: CountdownState,
     timer: TimerState,
     pomodoro: PomodoroState,
+    local_time: LocalTimeState,
     style: Style,
     with_decis: bool,
     footer: FooterState,
@@ -209,6 +211,10 @@ impl App {
                 round: pomodoro_round,
                 app_tx: app_tx.clone(),
             }),
+            local_time: LocalTimeState::new(LocalTimeStateArgs {
+                app_time,
+                app_time_format,
+            }),
             footer: FooterState::new(
                 show_menu,
                 if footer_toggle_app_time == Toggle::On {
@@ -233,26 +239,38 @@ impl App {
                 KeyCode::Char('c') => app.content = Content::Countdown,
                 KeyCode::Char('t') => app.content = Content::Timer,
                 KeyCode::Char('p') => app.content = Content::Pomodoro,
+                KeyCode::Char('l') => app.content = Content::LocalTime,
                 // toogle app time format
                 KeyCode::Char(':') => {
-                    //
-                    // TODO: Check content != LocalClock
-                    let new_format = match app.footer.app_time_format() {
-                        // footer is hidden in footer ->
-                        None => Some(AppTimeFormat::first()),
-                        Some(v) => {
-                            if v != &AppTimeFormat::last() {
-                                Some(v.next())
-                            } else {
-                                None
-                            }
+                    if app.content == Content::LocalTime {
+                        // For LocalTime content: just cycle through formats
+                        app.app_time_format = app.app_time_format.next();
+                        app.local_time.set_app_time_format(app.app_time_format);
+                        // Only update footer if it's currently showing time
+                        if app.footer.app_time_format().is_some() {
+                            app.footer.set_app_time_format(Some(app.app_time_format));
                         }
-                    };
+                    } else {
+                        // For other content: allow footer to toggle between formats and None
+                        let new_format = match app.footer.app_time_format() {
+                            // footer is hidden -> show first format
+                            None => Some(AppTimeFormat::first()),
+                            Some(v) => {
+                                if v != &AppTimeFormat::last() {
+                                    Some(v.next())
+                                } else {
+                                    // reached last format -> hide footer time
+                                    None
+                                }
+                            }
+                        };
 
-                    if let Some(format) = new_format {
-                        app.app_time_format = format;
+                        if let Some(format) = new_format {
+                            app.app_time_format = format;
+                            app.local_time.set_app_time_format(format);
+                        }
+                        app.footer.set_app_time_format(new_format);
                     }
-                    app.footer.set_app_time_format(new_format);
                 }
                 // toogle menu
                 KeyCode::Char('m') => app.footer.set_show_menu(!app.footer.get_show_menu()),
@@ -276,6 +294,7 @@ impl App {
             if matches!(event, events::TuiEvent::Tick) {
                 app.app_time = get_app_time();
                 app.countdown.set_app_time(app.app_time);
+                app.local_time.set_app_time(app.app_time);
             }
 
             // Pipe events into subviews and handle only 'unhandled' events afterwards
@@ -283,6 +302,7 @@ impl App {
                 Content::Countdown => app.countdown.update(event.clone()),
                 Content::Timer => app.timer.update(event.clone()),
                 Content::Pomodoro => app.pomodoro.update(event.clone()),
+                Content::LocalTime => app.local_time.update(event.clone()),
             } {
                 match unhandled {
                     events::TuiEvent::Render | events::TuiEvent::Resize => {
@@ -373,6 +393,7 @@ impl App {
                     AppEditMode::None
                 }
             }
+            Content::LocalTime => AppEditMode::None,
         }
     }
 
@@ -381,6 +402,8 @@ impl App {
             Content::Countdown => self.countdown.is_running(),
             Content::Timer => self.timer.get_clock().is_running(),
             Content::Pomodoro => self.pomodoro.get_clock().is_running(),
+            // `LocalTime` does not use a `Clock`
+            Content::LocalTime => false,
         }
     }
 
@@ -389,6 +412,7 @@ impl App {
             Content::Countdown => Some(self.countdown.get_clock().get_percentage_done()),
             Content::Timer => None,
             Content::Pomodoro => Some(self.pomodoro.get_clock().get_percentage_done()),
+            Content::LocalTime => None,
         }
     }
 
@@ -451,6 +475,9 @@ impl AppWidget {
                 blink: state.blink == Toggle::On,
             }
             .render(area, buf, &mut state.pomodoro),
+            Content::LocalTime => {
+                LocalTimeWidget { style: state.style }.render(area, buf, &mut state.local_time);
+            }
         };
     }
 }

src/common.rs

@@ -2,8 +2,7 @@ use clap::ValueEnum;
 use ratatui::symbols::shade;
 use serde::{Deserialize, Serialize};
 use strum::EnumString;
-use time::OffsetDateTime;
-use time::format_description;
+use time::{OffsetDateTime, format_description};
 
 #[derive(
     Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, ValueEnum, Default, Serialize, Deserialize,
@@ -16,8 +15,8 @@ pub enum Content {
     Timer,
     #[value(name = "pomodoro", alias = "p")]
     Pomodoro,
-    // #[value(name = "localclock", alias = "l")]
-    // LocalClock,
+    #[value(name = "localtime", alias = "l")]
+    LocalTime,
 }
 
 #[derive(Clone, Debug)]
@@ -135,6 +134,30 @@ impl AppTime {
             })
             .unwrap_or_else(|e| e.to_string())
     }
+
+    pub fn get_period(&self) -> String {
+        format_description::parse("[period]")
+            .map_err(|_| "parse error")
+            .and_then(|fd| {
+                OffsetDateTime::from(*self)
+                    .format(&fd)
+                    .map_err(|_| "format error")
+            })
+            .unwrap_or_else(|e| e.to_string())
+    }
+
+    /// Converts `AppTime` into a `Duration` representing elapsed time since midnight (today).
+    pub fn as_duration_of_today(&self) -> std::time::Duration {
+        let dt = OffsetDateTime::from(*self);
+        let time = dt.time();
+
+        let total_nanos = u64::from(time.hour()) * 3_600_000_000_000
+            + u64::from(time.minute()) * 60_000_000_000
+            + u64::from(time.second()) * 1_000_000_000
+            + u64::from(time.nanosecond());
+
+        std::time::Duration::from_nanos(total_nanos)
+    }
 }
 
 #[derive(Debug)]

src/duration.rs

@@ -60,10 +60,19 @@ impl DurationEx {
         self.seconds() / (SECS_PER_MINUTE * MINS_PER_HOUR)
     }
 
+    /// Hours as 24-hour clock
     pub fn hours_mod(&self) -> u64 {
         self.hours() % HOURS_PER_DAY
     }
 
+    /// Hours as 12-hour clock
+    pub fn hours_mod_12(&self) -> u64 {
+        // 0 => 12,
+        // 1..=12 => hours,
+        // 13..=23 => hours - 12,
+        (self.hours_mod() + 11) % 12 + 1
+    }
+
     pub fn minutes(&self) -> u64 {
         self.seconds() / MINS_PER_HOUR
     }
@@ -211,6 +220,34 @@ mod tests {
         assert_eq!(format!("{ex3}"), "11");
     }
 
+    #[test]
+    fn test_hours_mod_12() {
+        // 24 -> 12
+        let ex: DurationEx = ONE_HOUR.saturating_mul(24).into();
+        let result = ex.hours_mod_12();
+        assert_eq!(result, 12);
+
+        // 12 -> 12
+        let ex: DurationEx = ONE_HOUR.saturating_mul(12).into();
+        let result = ex.hours_mod_12();
+        assert_eq!(result, 12);
+
+        // 0 -> 12
+        let ex: DurationEx = ONE_SECOND.into();
+        let result = ex.hours_mod_12();
+        assert_eq!(result, 12);
+
+        // 13 -> 1
+        let ex: DurationEx = ONE_HOUR.saturating_mul(13).into();
+        let result = ex.hours_mod_12();
+        assert_eq!(result, 1);
+
+        // 1 -> 1
+        let ex: DurationEx = ONE_HOUR.saturating_mul(1).into();
+        let result = ex.hours_mod_12();
+        assert_eq!(result, 1);
+    }
+
     #[test]
     fn test_parse_duration() {
         // ss

src/widgets.rs

@@ -8,6 +8,7 @@ pub mod countdown;
 pub mod edit_time;
 pub mod footer;
 pub mod header;
+pub mod local_time;
 pub mod pomodoro;
 pub mod progressbar;
 pub mod timer;

src/widgets/footer.rs

@@ -56,6 +56,7 @@ impl StatefulWidget for Footer {
             (Content::Countdown, "[c]ountdown"),
             (Content::Timer, "[t]imer"),
             (Content::Pomodoro, "[p]omodoro"),
+            (Content::LocalTime, "[l]ocal time"),
         ]);
 
         let [_, area] =
@@ -71,11 +72,12 @@ impl StatefulWidget for Footer {
             )
             .title(
                 Line::from(
-                    match state.app_time_format {
-                        // `Hidden` -> no (empty) title
-                        None => "".into(),
-                        // others -> add some space around
-                        Some(v) => format!(" {} ", self.app_time.format(&v))
+                    match (state.app_time_format, self.selected_content) {
+                        // Show time
+                        (Some(v), content) if content != Content::LocalTime => format!(" {} " // add some space around
+                            , self.app_time.format(&v)),
+                        // Hide time -> empty
+                        _ => "".into(),
                     }
                 ).right_aligned())
             .border_set(border::PLAIN)
@@ -102,36 +104,39 @@ impl StatefulWidget for Footer {
 
             const SPACE: &str = "  "; // 2 empty spaces
             let widths = [Constraint::Length(12), Constraint::Percentage(100)];
-            let table = Table::new(
-                [
-                    // screens
-                    Row::new(vec![
-                        Cell::from(Span::styled(
-                            "screens",
-                            Style::default().add_modifier(Modifier::BOLD),
+            let mut table_rows = vec![
+                // screens
+                Row::new(vec![
+                    Cell::from(Span::styled(
+                        "screens",
+                        Style::default().add_modifier(Modifier::BOLD),
+                    )),
+                    Cell::from(Line::from(content_labels)),
+                ]),
+                // appearance
+                Row::new(vec![
+                    Cell::from(Span::styled(
+                        "appearance",
+                        Style::default().add_modifier(Modifier::BOLD),
+                    )),
+                    Cell::from(Line::from(vec![
+                        Span::from("[,]change style"),
+                        Span::from(SPACE),
+                        Span::from("[.]toggle deciseconds"),
+                        Span::from(SPACE),
+                        Span::from(format!(
+                            "[:]toggle {} time",
+                            match self.app_time {
+                                AppTime::Local(_) => "local",
+                                AppTime::Utc(_) => "utc",
+                            }
                         )),
-                        Cell::from(Line::from(content_labels)),
-                    ]),
-                    // appearance
-                    Row::new(vec![
-                        Cell::from(Span::styled(
-                            "appearance",
-                            Style::default().add_modifier(Modifier::BOLD),
-                        )),
-                        Cell::from(Line::from(vec![
-                            Span::from("[,]change style"),
-                            Span::from(SPACE),
-                            Span::from("[.]toggle deciseconds"),
-                            Span::from(SPACE),
-                            Span::from(format!(
-                                "[:]toggle {} time",
-                                match self.app_time {
-                                    AppTime::Local(_) => "local",
-                                    AppTime::Utc(_) => "utc",
-                                }
-                            )),
-                        ])),
-                    ]),
+                    ])),
+                ]),
+            ];
+
+            if self.selected_content != Content::LocalTime {
+                table_rows.extend_from_slice(&[
                     // controls - 1. row
                     Row::new(vec![
                         Cell::from(Span::styled(
@@ -224,10 +229,10 @@ impl StatefulWidget for Footer {
                             }
                         })),
                     ]),
-                ],
-                widths,
-            )
-            .column_spacing(1);
+                ])
+            }
+
+            let table = Table::new(table_rows, widths).column_spacing(1);
 
             Widget::render(table, menu_area, buf);
         }

src/widgets/local_time.rs

@@ -0,0 +1,185 @@
+use ratatui::{
+    buffer::Buffer,
+    layout::{Constraint, Layout, Rect},
+    style::{Modifier, Style},
+    text::{Line, Span},
+    widgets::{StatefulWidget, Widget},
+};
+
+use crate::{
+    common::{AppTime, AppTimeFormat, Style as DigitStyle},
+    duration::DurationEx,
+    events::{TuiEvent, TuiEventHandler},
+    utils::center,
+    widgets::clock_elements::{
+        COLON_WIDTH, Colon, DIGIT_HEIGHT, DIGIT_SPACE_WIDTH, DIGIT_WIDTH, Digit,
+    },
+};
+use std::cmp::max;
+
+/// State for `LocalTimeWidget`
+pub struct LocalTimeState {
+    time: AppTime,
+    format: AppTimeFormat,
+}
+
+pub struct LocalTimeStateArgs {
+    pub app_time: AppTime,
+    pub app_time_format: AppTimeFormat,
+}
+
+impl LocalTimeState {
+    pub fn new(args: LocalTimeStateArgs) -> Self {
+        let LocalTimeStateArgs {
+            app_time,
+            app_time_format,
+        } = args;
+
+        Self {
+            time: app_time,
+            format: app_time_format,
+        }
+    }
+
+    pub fn set_app_time(&mut self, app_time: AppTime) {
+        self.time = app_time;
+    }
+
+    pub fn set_app_time_format(&mut self, format: AppTimeFormat) {
+        self.format = format;
+    }
+}
+
+impl TuiEventHandler for LocalTimeState {
+    fn update(&mut self, event: TuiEvent) -> Option<TuiEvent> {
+        Some(event)
+    }
+}
+
+#[derive(Debug)]
+pub struct LocalTimeWidget {
+    pub style: DigitStyle,
+}
+
+impl LocalTimeWidget {
+    fn get_horizontal_lengths(&self, format: &AppTimeFormat) -> Vec<u16> {
+        const PERIOD_WIDTH: u16 = 2; // PM or AM
+
+        match format {
+            AppTimeFormat::HhMmSs => vec![
+                DIGIT_WIDTH,       // H
+                DIGIT_SPACE_WIDTH, // (space)
+                DIGIT_WIDTH,       // h
+                COLON_WIDTH,       // :
+                DIGIT_WIDTH,       // M
+                DIGIT_SPACE_WIDTH, // (space)
+                DIGIT_WIDTH,       // m
+                COLON_WIDTH,       // :
+                DIGIT_WIDTH,       // S
+                DIGIT_SPACE_WIDTH, // (space)
+                DIGIT_WIDTH,       // s
+            ],
+            AppTimeFormat::HhMm => vec![
+                DIGIT_WIDTH,       // H
+                DIGIT_SPACE_WIDTH, // (space)
+                DIGIT_WIDTH,       // h
+                COLON_WIDTH,       // :
+                DIGIT_WIDTH,       // M
+                DIGIT_SPACE_WIDTH, // (space)
+                DIGIT_WIDTH,       // m
+            ],
+            AppTimeFormat::Hh12Mm => vec![
+                DIGIT_SPACE_WIDTH + PERIOD_WIDTH, // (space) + (empty period) to center everything well horizontally
+                DIGIT_WIDTH,                      // H
+                DIGIT_SPACE_WIDTH,                // (space)
+                DIGIT_WIDTH,                      // h
+                COLON_WIDTH,                      // :
+                DIGIT_WIDTH,                      // M
+                DIGIT_SPACE_WIDTH,                // (space)
+                DIGIT_WIDTH,                      // m
+                DIGIT_SPACE_WIDTH,                // (space)
+                PERIOD_WIDTH,                     // period
+            ],
+        }
+    }
+}
+
+impl StatefulWidget for LocalTimeWidget {
+    type State = LocalTimeState;
+    fn render(self, area: Rect, buf: &mut Buffer, state: &mut Self::State) {
+        let current_value: DurationEx = state.time.as_duration_of_today().into();
+        let hours = current_value.hours_mod();
+        let hours12 = current_value.hours_mod_12();
+        let minutes = current_value.minutes_mod();
+        let seconds = current_value.seconds_mod();
+        let symbol = self.style.get_digit_symbol();
+
+        let label = Line::raw("Local Time".to_uppercase());
+
+        let format = state.format;
+        let widths = self.get_horizontal_lengths(&format);
+        let mut widths = widths;
+        // Special case for `Hh12Mm`
+        // It might be `h:Mm` OR `Hh:Mm` depending on `hours12`
+        if state.format == AppTimeFormat::Hh12Mm && hours12 < 10 {
+            // single digit means, no (zero) width's for `H` and `space`
+            widths[1] = 0; // `H`
+            widths[2] = 0; // `space`
+        }
+
+        let width = widths.iter().sum();
+        let area = center(
+            area,
+            Constraint::Length(max(width, label.width() as u16)),
+            Constraint::Length(DIGIT_HEIGHT + 1 /* height of label */),
+        );
+
+        let [v1, v2] = Layout::vertical(Constraint::from_lengths([DIGIT_HEIGHT, 1])).areas(area);
+
+        match state.format {
+            AppTimeFormat::HhMmSs => {
+                let [hh, _, h, c_hm, mm, _, m, c_ms, ss, _, s] =
+                    Layout::horizontal(Constraint::from_lengths(widths)).areas(v1);
+                Digit::new(hours / 10, false, symbol).render(hh, buf);
+                Digit::new(hours % 10, false, symbol).render(h, buf);
+                Colon::new(symbol).render(c_hm, buf);
+                Digit::new(minutes / 10, false, symbol).render(mm, buf);
+                Digit::new(minutes % 10, false, symbol).render(m, buf);
+                Colon::new(symbol).render(c_ms, buf);
+                Digit::new(seconds / 10, false, symbol).render(ss, buf);
+                Digit::new(seconds % 10, false, symbol).render(s, buf);
+            }
+            AppTimeFormat::HhMm => {
+                let [hh, _, h, c_hm, mm, _, m] =
+                    Layout::horizontal(Constraint::from_lengths(widths)).areas(v1);
+                Digit::new(hours / 10, false, symbol).render(hh, buf);
+                Digit::new(hours % 10, false, symbol).render(h, buf);
+                Colon::new(symbol).render(c_hm, buf);
+                Digit::new(minutes / 10, false, symbol).render(mm, buf);
+                Digit::new(minutes % 10, false, symbol).render(m, buf);
+            }
+            AppTimeFormat::Hh12Mm => {
+                let [_, hh, _, h, c_hm, mm, _, m, _, p] =
+                    Layout::horizontal(Constraint::from_lengths(widths)).areas(v1);
+                // Hh
+                if hours12 >= 10 {
+                    Digit::new(hours12 / 10, false, symbol).render(hh, buf);
+                    Digit::new(hours12 % 10, false, symbol).render(h, buf);
+                }
+                // h
+                else {
+                    Digit::new(hours12, false, symbol).render(h, buf);
+                }
+                Colon::new(symbol).render(c_hm, buf);
+                Digit::new(minutes / 10, false, symbol).render(mm, buf);
+                Digit::new(minutes % 10, false, symbol).render(m, buf);
+                Span::styled(
+                    state.time.get_period().to_uppercase(),
+                    Style::default().add_modifier(Modifier::BOLD),
+                )
+                .render(p, buf);
+            }
+        }
+        label.centered().render(v2, buf);
+    }
+}