extract clock elements (#28)

Few tests. Extract `Style` to `common`.

src/widgets/clock_elements.rs

@@ -0,0 +1,247 @@
+use ratatui::{
+    buffer::Buffer,
+    layout::{Position, Rect},
+    widgets::Widget,
+};
+
+pub const DIGIT_SIZE: usize = 5;
+pub const DIGIT_WIDTH: u16 = DIGIT_SIZE as u16;
+pub const DIGIT_HEIGHT: u16 = DIGIT_SIZE as u16 + 1 /* border height */;
+pub const COLON_WIDTH: u16 = 4; // incl. padding left + padding right
+pub const DOT_WIDTH: u16 = 4; // incl. padding left + padding right
+
+#[rustfmt::skip]
+const DIGIT_0: [u8; DIGIT_SIZE * DIGIT_SIZE] = [
+    1, 1, 1, 1, 1,
+    1, 1, 0, 1, 1,
+    1, 1, 0, 1, 1,
+    1, 1, 0, 1, 1,
+    1, 1, 1, 1, 1,
+];
+
+#[rustfmt::skip]
+const DIGIT_1: [u8; DIGIT_SIZE * DIGIT_SIZE] = [
+    0, 0, 0, 1, 1,
+    0, 0, 0, 1, 1,
+    0, 0, 0, 1, 1,
+    0, 0, 0, 1, 1,
+    0, 0, 0, 1, 1,
+];
+
+#[rustfmt::skip]
+const DIGIT_2: [u8; DIGIT_SIZE * DIGIT_SIZE] = [
+    1, 1, 1, 1, 1,
+    0, 0, 0, 1, 1,
+    1, 1, 1, 1, 1,
+    1, 1, 0, 0, 0,
+    1, 1, 1, 1, 1,
+];
+
+#[rustfmt::skip]
+const DIGIT_3: [u8; DIGIT_SIZE * DIGIT_SIZE] = [
+    1, 1, 1, 1, 1,
+    0, 0, 0, 1, 1,
+    1, 1, 1, 1, 1,
+    0, 0, 0, 1, 1,
+    1, 1, 1, 1, 1,
+];
+
+#[rustfmt::skip]
+const DIGIT_4: [u8; DIGIT_SIZE * DIGIT_SIZE] = [
+    1, 1, 0, 1, 1,
+    1, 1, 0, 1, 1,
+    1, 1, 1, 1, 1,
+    0, 0, 0, 1, 1,
+    0, 0, 0, 1, 1,
+];
+
+#[rustfmt::skip]
+const DIGIT_5: [u8; DIGIT_SIZE * DIGIT_SIZE] = [
+    1, 1, 1, 1, 1,
+    1, 1, 0, 0, 0,
+    1, 1, 1, 1, 1,
+    0, 0, 0, 1, 1,
+    1, 1, 1, 1, 1,
+];
+
+#[rustfmt::skip]
+const DIGIT_6: [u8; DIGIT_SIZE * DIGIT_SIZE] = [
+    1, 1, 1, 1, 1,
+    1, 1, 0, 0, 0,
+    1, 1, 1, 1, 1,
+    1, 1, 0, 1, 1,
+    1, 1, 1, 1, 1,
+];
+
+#[rustfmt::skip]
+const DIGIT_7: [u8; DIGIT_SIZE * DIGIT_SIZE] = [
+    1, 1, 1, 1, 1,
+    0, 0, 0, 1, 1,
+    0, 0, 0, 1, 1,
+    0, 0, 0, 1, 1,
+    0, 0, 0, 1, 1,
+];
+
+#[rustfmt::skip]
+const DIGIT_8: [u8; DIGIT_SIZE * DIGIT_SIZE] = [
+    1, 1, 1, 1, 1,
+    1, 1, 0, 1, 1,
+    1, 1, 1, 1, 1,
+    1, 1, 0, 1, 1,
+    1, 1, 1, 1, 1,
+];
+
+#[rustfmt::skip]
+const DIGIT_9: [u8; DIGIT_SIZE * DIGIT_SIZE] = [
+    1, 1, 1, 1, 1,
+    1, 1, 0, 1, 1,
+    1, 1, 1, 1, 1,
+    0, 0, 0, 1, 1,
+    1, 1, 1, 1, 1,
+];
+
+#[rustfmt::skip]
+const CHAR_E: [u8; DIGIT_SIZE * DIGIT_SIZE] = [
+    1, 1, 1, 1, 1,
+    1, 1, 0, 0, 0,
+    1, 1, 1, 1, 0,
+    1, 1, 0, 0, 0,
+    1, 1, 1, 1, 1,
+];
+
+pub struct Digit<'a> {
+    digit: u64,
+    with_border: bool,
+    symbol: &'a str,
+}
+
+impl<'a> Digit<'a> {
+    pub fn new(digit: u64, with_border: bool, symbol: &'a str) -> Self {
+        Self {
+            digit,
+            with_border,
+            symbol,
+        }
+    }
+}
+
+impl<'a> Widget for Digit<'a> {
+    fn render(self, area: Rect, buf: &mut Buffer) {
+        let left = area.left();
+        let top = area.top();
+
+        let patterns = match self.digit {
+            0 => DIGIT_0,
+            1 => DIGIT_1,
+            2 => DIGIT_2,
+            3 => DIGIT_3,
+            4 => DIGIT_4,
+            5 => DIGIT_5,
+            6 => DIGIT_6,
+            7 => DIGIT_7,
+            8 => DIGIT_8,
+            9 => DIGIT_9,
+            _ => CHAR_E,
+        };
+
+        patterns.iter().enumerate().for_each(|(i, item)| {
+            let x = i % DIGIT_SIZE;
+            let y = i / DIGIT_SIZE;
+            if *item == 1 {
+                let p = Position {
+                    x: left + x as u16,
+                    y: top + y as u16,
+                };
+                if let Some(cell) = buf.cell_mut(p) {
+                    cell.set_symbol(self.symbol);
+                }
+            }
+        });
+
+        // Add border at the bottom
+        if self.with_border {
+            for x in 0..area.width {
+                let p = Position {
+                    x: left + x,
+                    y: top + area.height - 1,
+                };
+                if let Some(cell) = buf.cell_mut(p) {
+                    cell.set_symbol("─");
+                }
+            }
+        }
+    }
+}
+
+pub struct Dot<'a> {
+    symbol: &'a str,
+}
+
+impl<'a> Dot<'a> {
+    pub fn new(symbol: &'a str) -> Self {
+        Self { symbol }
+    }
+}
+
+impl<'a> Widget for Dot<'a> {
+    fn render(self, area: Rect, buf: &mut Buffer) {
+        let positions = [
+            Position {
+                x: area.left() + 1,
+                y: area.top() + area.height - 2,
+            },
+            Position {
+                x: area.left() + 2,
+                y: area.top() + area.height - 2,
+            },
+        ];
+
+        for pos in positions {
+            if let Some(cell) = buf.cell_mut(pos) {
+                cell.set_symbol(self.symbol);
+            }
+        }
+    }
+}
+
+pub struct Colon<'a> {
+    symbol: &'a str,
+}
+
+impl<'a> Colon<'a> {
+    pub fn new(symbol: &'a str) -> Self {
+        Self { symbol }
+    }
+}
+
+impl<'a> Widget for Colon<'a> {
+    fn render(self, area: Rect, buf: &mut Buffer) {
+        let left = area.left();
+        let top = area.top();
+
+        let positions = [
+            Position {
+                x: left + 1,
+                y: top + 1,
+            },
+            Position {
+                x: left + 2,
+                y: top + 1,
+            },
+            Position {
+                x: left + 1,
+                y: top + 3,
+            },
+            Position {
+                x: left + 2,
+                y: top + 3,
+            },
+        ];
+
+        for pos in positions {
+            if let Some(cell) = buf.cell_mut(pos) {
+                cell.set_symbol(self.symbol);
+            }
+        }
+    }
+}