Pane magnification can cause mouse to drag tabs unexpectedly

[Nairou]

Summary

When using split pane, as well as active_pane_modifiers.magnification, clicking a tab on the second pane can cause the mouse to go into drag-tab mode if the click ends up outside of the tab due to the pane size change.

2025-02-10_21-39-41.mp4

Steps to trigger the problem:

1. Set active_pane_modifiers.magnification to a value greater than 1.0.
2. Split the pane vertically and open multiple tabs on each pane.
3. With the left pane active, click a tab on the right pane.
4. Right pane will expand due to magnification, which will shift the position of the tabs, potentially leaving the mouse mid-click but no longer over the clicked tab.

Actual Behavior:

Zed thinks you want to drag the tab order, even though it was the tab that moved instead of the mouse cursor.

Expected Behavior:

Cancel any tab dragging checks when switching panes (at least when magnification is enabled).

Zed Version and System Specs

Zed: v0.172.9 (Zed)
OS: Linux Wayland nixos 25.05
Memory: 62.7 GiB
Architecture: x86_64
GPU: AMD Radeon RX 6800 XT (RADV NAVI21) || radv || Mesa 24.3.4

[probably-neb]

Hey, sorry this is happening. Definitely not the desired behavior. Thanks for reporting!