From e7a0f0e8760934f8b6c9fc0fa9acd387fdc93321 Mon Sep 17 00:00:00 2001
From: Hourann <tdkgn@outlook.com>
Date: Tue, 8 Apr 2025 04:10:14 +0800
Subject: [PATCH] terminal: Fix misaligned mouse selection when inline assist
 is active (#26112)

This PR fixes an issue where mouse selection in the terminal would be
offset when the Terminal Inline Assistant was active. The problem was
caused by incorrect coordinate translation when handling mouse events
with an active inline assistant.

The fix adjusts mouse event coordinates by properly accounting for the
terminal view's `scroll_top` value when the inline assistant is present,
ensuring that text selection precisely follows the mouse cursor
position.

Closes #26111

Release Notes:

- Fixed text selection misalignment in terminal when the inline
assistant is active

Co-authored-by: Peter Tripp <peter@zed.dev>
---
 crates/terminal_view/src/terminal_element.rs | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/crates/terminal_view/src/terminal_element.rs b/crates/terminal_view/src/terminal_element.rs
index 66a7b83771..e41f535f3e 100644
--- a/crates/terminal_view/src/terminal_element.rs
+++ b/crates/terminal_view/src/terminal_element.rs
@@ -425,14 +425,23 @@ impl TerminalElement {
     fn register_mouse_listeners(&mut self, mode: TermMode, hitbox: &Hitbox, window: &mut Window) {
         let focus = self.focus.clone();
         let terminal = self.terminal.clone();
+        let terminal_view = self.terminal_view.clone();
 
         self.interactivity.on_mouse_down(MouseButton::Left, {
             let terminal = terminal.clone();
             let focus = focus.clone();
+            let terminal_view = terminal_view.clone();
+
             move |e, window, cx| {
                 window.focus(&focus);
+
+                let scroll_top = terminal_view.read(cx).scroll_top;
                 terminal.update(cx, |terminal, cx| {
-                    terminal.mouse_down(e, cx);
+                    let mut adjusted_event = e.clone();
+                    if scroll_top > Pixels::ZERO {
+                        adjusted_event.position.y += scroll_top;
+                    }
+                    terminal.mouse_down(&adjusted_event, cx);
                     cx.notify();
                 })
             }
@@ -442,6 +451,7 @@ impl TerminalElement {
             let terminal = self.terminal.clone();
             let hitbox = hitbox.clone();
             let focus = focus.clone();
+            let terminal_view = terminal_view.clone();
             move |e: &MouseMoveEvent, phase, window, cx| {
                 if phase != DispatchPhase::Bubble {
                     return;
@@ -449,9 +459,15 @@ impl TerminalElement {
 
                 if e.pressed_button.is_some() && !cx.has_active_drag() && focus.is_focused(window) {
                     let hovered = hitbox.is_hovered(window);
+
+                    let scroll_top = terminal_view.read(cx).scroll_top;
                     terminal.update(cx, |terminal, cx| {
                         if terminal.selection_started() || hovered {
-                            terminal.mouse_drag(e, hitbox.bounds, cx);
+                            let mut adjusted_event = e.clone();
+                            if scroll_top > Pixels::ZERO {
+                                adjusted_event.position.y += scroll_top;
+                            }
+                            terminal.mouse_drag(&adjusted_event, hitbox.bounds, cx);
                             cx.notify();
                         }
                     })