From da57b9c12dcf7f3480247c5a7ac1df5e1a19deff Mon Sep 17 00:00:00 2001
From: KENZ <KENZ.gelsoft@gmail.com>
Date: Fri, 2 May 2025 07:01:55 +0900
Subject: [PATCH] Estimate preedit position without calling layout_runs()

---
 src/terminal_box.rs | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/src/terminal_box.rs b/src/terminal_box.rs
index 8eac907..ed7f935 100644
--- a/src/terminal_box.rs
+++ b/src/terminal_box.rs
@@ -235,13 +235,31 @@ where
         self
     }
 
-    fn input_method<'b>(&self, state: &'b State, layout: Layout<'_>) -> InputMethod<&'b str> {
+    fn input_method<'b>(
+        &self,
+        state: &'b State,
+        layout: Layout<'_>,
+        terminal: &std::sync::MutexGuard<'_, Terminal>,
+    ) -> InputMethod<&'b str> {
         if !state.is_focused {
             return InputMethod::Disabled;
         }
 
+        let view_position = layout.position() + [self.padding.left, self.padding.top].into();
+
+        // Draw cursor
+        let cursor = terminal.term.lock().renderable_content().cursor;
+        let col = cursor.point.column.0;
+        let line = cursor.point.line.0;
+        let width = terminal.size().cell_width;
+        let height = terminal.size().cell_height;
+        let bottom_left = view_position
+            + Vector::new(
+                (col as f32 * width).floor(),
+                ((line + 1) as f32 * height).floor(),
+            );
         InputMethod::Enabled {
-            cursor: Rectangle::default(),
+            cursor: Rectangle::new(bottom_left, Size::default()),
             purpose: input_method::Purpose::Normal,
             preedit: state.preedit.as_ref().map(input_method::Preedit::as_ref),
         }
@@ -892,7 +910,7 @@ where
                             shell.request_redraw();
                         }
                     }
-                    shell.request_input_method(&self.input_method(state, layout));
+                    shell.request_input_method(&self.input_method(state, layout, &terminal));
                 }
                 cosmic::iced::window::Event::Unfocused => {
                     state.is_focused = false;