Make calendar scrollable

src/app.rs

@@ -1,4 +1,6 @@
 use crate::config::TConfig;
+use crate::calendar::Calendar;
+use crate::table::{Row, Table, TableState};
 
 use std::cmp::Ordering;
 use std::convert::TryInto;
@@ -14,7 +16,6 @@ use uuid::Uuid;
 
 use chrono::{Datelike, Local, NaiveDateTime, TimeZone};
 
-use crate::calendar::Calendar;
 use std::sync::{Arc, Mutex};
 use std::{sync::mpsc, thread, time::Duration};
 use tui::{
@@ -26,8 +27,6 @@ use tui::{
     widgets::{Block, Borders, Clear, Paragraph},
 };
 
-use crate::table::{Row, Table, TableState};
-
 use rustyline::error::ReadlineError;
 use rustyline::line_buffer::LineBuffer;
 use rustyline::At;
@@ -359,6 +358,7 @@ pub struct TTApp {
     pub error: String,
     pub tasks: Arc<Mutex<Vec<Task>>>,
     pub task_report_table: TaskReportTable,
+    pub calendar_year: i32,
     pub mode: AppMode,
     pub config: TConfig,
 }
@@ -378,6 +378,7 @@ impl TTApp {
             mode: AppMode::TaskReport,
             config: TConfig::default(),
             task_report_table: TaskReportTable::new(),
+            calendar_year: Local::today().year(),
         };
         for c in "status:pending ".chars() {
             app.filter.insert(c, 1);
@@ -439,10 +440,8 @@ impl TTApp {
             .split(f.size());
         let today = Local::today();
         let c = Calendar::default()
-            .block(Block::default().title("Calendar").borders(Borders::ALL));
+            .block(Block::default().title("Calendar").borders(Borders::ALL))
-        // let p = Paragraph::new(Text::from())
+            .year(self.calendar_year);
-        //     .alignment(Alignment::Left)
-        //     .block(Block::default().borders(Borders::ALL).title("Calendar"));
         f.render_widget(c, rects[0]);
     }
 
@@ -1501,6 +1500,8 @@ impl TTApp {
                 Key::Char('[') => {
                     self.mode = AppMode::TaskReport;
                 }
+                Key::Up | Key::Char('k') => self.calendar_year -= 1,
+                Key::Down | Key::Char('j') => self.calendar_year += 1,
                 Key::Ctrl('c') | Key::Char('q') => self.should_quit = true,
                 _ => {}
             },

src/calendar.rs

@@ -22,24 +22,21 @@ use unicode_width::UnicodeWidthStr;
 pub struct Calendar<'a> {
     pub block: Option<Block<'a>>,
     pub year: i32,
-    pub days: Vec<(NaiveDate, NaiveDate)>,
+    pub month: u32,
     pub style: Style,
     pub months_per_row: usize,
 }
 
 impl<'a> Default for Calendar<'a> {
     fn default() -> Calendar<'a> {
-        let year = Local::today().year().into();
+        let year = Local::today().year();
-        let days: Vec<_> = (0..12).into_iter().map(|i| {
+        let month = Local::today().month();
-            let first = NaiveDate::from_ymd(year, i+1, 1);
-            (first, first - Duration::days(first.weekday().num_days_from_sunday() as i64))
-        }).collect();
         Calendar {
             block: None,
             style: Default::default(),
             months_per_row: 0,
             year,
-            days,
+            month,
         }
     }
 }
@@ -57,11 +54,11 @@ impl<'a> Calendar<'a> {
 
     pub fn year(mut self, year: i32) -> Self {
         self.year = year;
-        let days: Vec<_> = (0..12).into_iter().map(|i| {
+        self
-            let first = NaiveDate::from_ymd(year, i+1, 1);
+    }
-            (first, first - Duration::days(first.weekday().num_days_from_sunday() as i64))
+
-        }).collect();
+    pub fn month(mut self, month: u32) -> Self {
-        self.days = days;
+        self.month = month;
         self
     }
 }
@@ -101,18 +98,41 @@ impl <'a> Widget for Calendar<'a> {
         let today = Local::today();
 
         let year = self.year;
+        let month = self.month;
+
         let months: Vec<_> = (0..12).collect();
-        let mut startm = 0;
+
+        let mut days: Vec<_> = months.iter().map(|i| {
+            let first = NaiveDate::from_ymd(year, i+1, 1);
+            (first, first - Duration::days(first.weekday().num_days_from_sunday() as i64))
+        }).collect();
+
+        days.append(&mut months.iter().map(|i| {
+                let first = NaiveDate::from_ymd(year + 1, i+1, 1);
+                (first, first - Duration::days(first.weekday().num_days_from_sunday() as i64))
+            }).collect::<Vec<_>>()
+        );
+
+        days.append(&mut months.iter().map(|i| {
+                let first = NaiveDate::from_ymd(year + 2, i+1, 1);
+                (first, first - Duration::days(first.weekday().num_days_from_sunday() as i64))
+            }).collect::<Vec<_>>()
+        );
+
+        let mut startm = 0 as usize;
         if self.months_per_row > area.width as usize / 8 / 3 || self.months_per_row <= 0 {
             self.months_per_row = area.width as usize / 8 / 3;
         }
         let mut y = area.y;
         y += 1;
+
         let x = area.x;
         let s = format!("{year:^width$}", year = year, width = area.width as usize - 4);
         buf.set_string(x, y, &s, Style::default().add_modifier(Modifier::BOLD));
+
         let startx = (area.width - 3 * 7 * self.months_per_row as u16 - self.months_per_row as u16) / 2;
         y += 2;
+        let mut year = 0;
         loop {
             let endm = std::cmp::min(startm + self.months_per_row, 12);
             let mut x = area.x + startx;
@@ -120,7 +140,7 @@ impl <'a> Widget for Calendar<'a> {
                 if c > startm {
                     x += 1;
                 }
-                let d = &mut self.days[c];
+                let d = &mut days[c];
                 let m = d.0.month() as usize;
                 let s = format!("{:^21}", month_names[m - 1]);
                 buf.set_string(x, y, &s, Style::default());
@@ -140,7 +160,7 @@ impl <'a> Widget for Calendar<'a> {
                     if c > startm {
                         x += 1;
                     }
-                    let d = &mut self.days[c];
+                    let d = &mut days[c + year * 12];
                     for _ in 0..7 {
                         let s = if d.0.month() == d.1.month() {
                             format!("{:>2}", d.1.day())
@@ -163,8 +183,16 @@ impl <'a> Widget for Calendar<'a> {
                 }
             }
             startm += self.months_per_row;
-            if startm >= 12 {
+            y += 1;
-                return;
+            if y + 8 > area.height {
+                break
+            } else if startm >= 12 {
+                startm = 0;
+                year += 1;
+                let x = area.x;
+                let s = format!("{year:^width$}", year = self.year as usize + year, width = area.width as usize - 4);
+                buf.set_string(x, y, &s, Style::default().add_modifier(Modifier::BOLD));
+                y += 1;
             }
             y += 1;
         }