From d4c4b9ad3773b0a817ec5b8d1e9d7aa6a006797b Mon Sep 17 00:00:00 2001
From: chulingera2025 <chulingera2025@gmail.com>
Date: Thu, 13 Nov 2025 10:19:52 +0800
Subject: [PATCH] input: Avoid blocking vertical scroll events in single-line
 mode (#1562) (#1572)

Fixes #1562

  ## Problem
Single-line input fields were blocking all scroll wheel events,
preventing parent containers from handling vertical page scrolling.

  ## Solution
  - Check if input is in single-line mode and scroll is purely vertical
  - Allow vertical scroll events to propagate in single-line mode
  - Only stop propagation when scroll offset actually changes

  ## Behavior
  - Single-line inputs: vertical scroll passes through to parent
  - Multi-line inputs: all scroll behavior unchanged
  - Horizontal scrolling still works in both modes
---
 crates/ui/src/input/state.rs | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/crates/ui/src/input/state.rs b/crates/ui/src/input/state.rs
index 6ac8dc1d..38487eae 100644
--- a/crates/ui/src/input/state.rs
+++ b/crates/ui/src/input/state.rs
@@ -1291,15 +1291,21 @@ impl InputState {
         window: &mut Window,
         cx: &mut Context<Self>,
     ) {
-        cx.stop_propagation();
-
         let line_height = self
             .last_layout
             .as_ref()
             .map(|layout| layout.line_height)
             .unwrap_or(window.line_height());
         let delta = event.delta.pixel_delta(line_height);
-        self.update_scroll_offset(Some(self.scroll_handle.offset() + delta), cx);
+
+        let old_offset = self.scroll_handle.offset();
+        self.update_scroll_offset(Some(old_offset + delta), cx);
+
+        // Only stop propagation if the offset actually changed
+        if self.scroll_handle.offset() != old_offset {
+            cx.stop_propagation();
+        }
+
         self.diagnostic_popover = None;
     }