Extract rooms widget and state

cove-tui/src/ui/rooms.rs

@@ -0,0 +1,84 @@
+use std::cmp;
+
+use tui::buffer::Buffer;
+use tui::layout::Rect;
+use tui::style::{Modifier, Style};
+use tui::widgets::{Block, Borders, StatefulWidget, Widget};
+
+pub struct Rooms {}
+
+impl Rooms {
+    pub fn new() -> Self {
+        Self {}
+    }
+}
+
+impl StatefulWidget for Rooms {
+    type State = RoomsState;
+
+    fn render(self, area: Rect, buf: &mut Buffer, state: &mut Self::State) {
+        state.width = cmp::min(state.width, area.width);
+
+        // let left = Rect {
+        //     width: area.width - 1,
+        //     ..area
+        // };
+        let right = Rect {
+            x: area.right() - 1,
+            width: 1,
+            ..area
+        };
+        let style = if state.hovering {
+            Style::default().add_modifier(Modifier::REVERSED)
+        } else {
+            Style::default()
+        };
+        Block::default()
+            .borders(Borders::RIGHT)
+            .style(style)
+            .render(right, buf);
+    }
+}
+
+#[derive(Debug)]
+pub struct RoomsState {
+    width: u16,
+    offset: u16,
+    hovering: bool,
+    dragging: bool,
+}
+
+impl Default for RoomsState {
+    fn default() -> Self {
+        Self {
+            width: 24,
+            offset: 0,
+            hovering: false,
+            dragging: false,
+        }
+    }
+}
+
+impl RoomsState {
+    pub fn width(&self) -> u16 {
+        self.width
+    }
+
+    pub fn hover(&mut self, active: bool) {
+        self.hovering = active;
+    }
+
+    pub fn drag(&mut self, active: bool) {
+        self.dragging = active;
+    }
+
+    pub fn dragging(&self) -> bool {
+        self.dragging
+    }
+
+    pub fn drag_to(&mut self, width: u16) {
+        if self.dragging {
+            self.width = width;
+        }
+    }
+}