Feat: early mouse support

src/input_egui.rs

@@ -1,4 +1,60 @@
-use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};
+use crossterm::event::{KeyCode, KeyEvent, KeyModifiers, MouseButton, MouseEvent, MouseEventKind};
+use ratatui::layout::Rect;
+
+pub fn convert_egui_mouse(
+    ctx: &egui::Context,
+    widget_rect: egui::Rect,
+    term: Rect,
+) -> Vec<MouseEvent> {
+    let mut events = Vec::new();
+    if widget_rect.width() < 1.0 || widget_rect.height() < 1.0 || term.width == 0 || term.height == 0 {
+        return events;
+    }
+
+    ctx.input(|i| {
+        let Some(pos) = i.pointer.latest_pos() else {
+            return;
+        };
+        if !widget_rect.contains(pos) {
+            return;
+        }
+
+        let col =
+            ((pos.x - widget_rect.left()) / widget_rect.width() * term.width as f32) as u16;
+        let row =
+            ((pos.y - widget_rect.top()) / widget_rect.height() * term.height as f32) as u16;
+        let col = col.min(term.width.saturating_sub(1));
+        let row = row.min(term.height.saturating_sub(1));
+
+        if i.pointer.button_clicked(egui::PointerButton::Primary) {
+            events.push(MouseEvent {
+                kind: MouseEventKind::Down(MouseButton::Left),
+                column: col,
+                row,
+                modifiers: KeyModifiers::empty(),
+            });
+        }
+
+        let scroll = i.raw_scroll_delta.y;
+        if scroll > 1.0 {
+            events.push(MouseEvent {
+                kind: MouseEventKind::ScrollUp,
+                column: col,
+                row,
+                modifiers: KeyModifiers::empty(),
+            });
+        } else if scroll < -1.0 {
+            events.push(MouseEvent {
+                kind: MouseEventKind::ScrollDown,
+                column: col,
+                row,
+                modifiers: KeyModifiers::empty(),
+            });
+        }
+    });
+
+    events
+}
 
 pub fn convert_egui_events(ctx: &egui::Context) -> Vec<KeyEvent> {
     let mut events = Vec::new();