Finn EitreimandKirill Bulatov d94aa26ac5 editor: Fix multi-line cursor expansion when multi-byte characters are involved (#51780) ...

Closes #51740 

The multi-line cursor expansion operates off of byte offsets, instead of
character offsets, so multi-byte characters like the umlaut cause the
multi-line cursors to be weirdly offset. To fix we just convert the
expansion logic to rely on utf16 characters instead of bytes.

before behavior:


https://github.com/user-attachments/assets/320e24e9-0fdd-4d16-a9e8-ca17c9e21ff2

after behavior: 


https://github.com/user-attachments/assets/c4f0334b-dffc-4530-91ee-577b4fab75dd

+ test to verify functionality.

Before you mark this PR as ready for review, make sure that you have:
- [x] Added a solid test coverage and/or screenshots from doing manual
testing
- [x] Done a self-review taking into account security and performance
aspects
- [x] Aligned any UI changes with the [UI
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)

Release Notes:

- editor: fixed multi-line cursor expansion dealing with multi-byte
characters.

---------

Co-authored-by: Kirill Bulatov <mail4score@gmail.com>

2026-03-19 16:21:03 +00:00

..

digraph

Add Vim digraphs (#14887)

2024-07-28 22:44:32 -06:00

helix

editor: Fix multi-line cursor expansion when multi-byte characters are involved (#51780)

2026-03-19 16:21:03 +00:00

normal

vim: Fix visual block Shift-I jumping to original cursor after Ctrl-D scroll (#50822)

2026-03-18 10:59:46 +00:00

test

sidebar: Keyboard nav improvements (and vim mode) (#51856)

2026-03-18 17:53:04 +00:00

change_list.rs

editor: Remove buffer and display map fields from SelectionsCollection (#42175)

2025-11-07 11:21:14 +01:00

command.rs

Save edited buffers before running a task (#48861)

2026-03-19 08:42:28 +00:00

digraph.rs

vim: Downgrade user config error from panic to log (#42070)

2025-11-06 08:37:04 +00:00

helix.rs

vim: Fix Helix mode subword motions to select traversed text (#45760)

2026-03-17 10:49:01 +00:00

indent.rs

Reduce amount of monomorphizations from FnMut closures (#49453)

2026-02-18 12:00:02 +01:00

insert.rs

Reduce amount of monomorphizations from FnMut closures (#49453)

2026-02-18 12:00:02 +01:00

mode_indicator.rs

Customizable vim mode text color (#46639)

2026-01-13 15:38:13 -06:00

motion.rs

vim: Fix Helix mode subword motions to select traversed text (#45760)

2026-03-17 10:49:01 +00:00

normal.rs

vim: Fix dot repeat ignoring recorded register (#50753)

2026-03-16 10:05:14 +00:00

object.rs

Reduce amount of monomorphizations from FnMut closures (#49453)

2026-02-18 12:00:02 +01:00

replace.rs

Improve clipboard support on Windows (#51807)

2026-03-18 22:09:26 -04:00

rewrap.rs

Reduce amount of monomorphizations from FnMut closures (#49453)

2026-02-18 12:00:02 +01:00

state.rs

Improve clipboard support on Windows (#51807)

2026-03-18 22:09:26 -04:00

surrounds.rs

git: Fix desynced scrolling between LHS and RHS of side-by-side diff (#47913)

2026-01-31 18:33:22 +00:00

test.rs

vim: Apply linked edits for delete/change/substitute (#48458)

2026-02-19 12:54:41 +00:00

vim.rs

sidebar: Keyboard nav improvements (and vim mode) (#51856)

2026-03-18 17:53:04 +00:00

visual.rs

vim: Fix visual block Shift-I jumping to original cursor after Ctrl-D scroll (#50822)

2026-03-18 10:59:46 +00:00