neovim

commit acb99b8a6572d8ea8d917955a653945550923be0
parent 1cb1cfead017df79aa590d1d297b116a85cb31c0
Author: Shadman <shadmansaleh3@gmail.com>
Date:   Tue,  9 Sep 2025 04:09:48 +0600

fix(prompt_buffer): plugins can't set `':` mark #35624

Problem:
Currently, prompt_buffer manages `:` mark by itself and exposes it
read-only mark. However when it fails there can be no mitigation made
by plugins. The `:` mark should act like a regular marks and be
modifiable.

Solution:
Allow plugins to set `:` mark.
Diffstat:
M
src/nvim/mark.c
 | 
8
++++++--
M
test/functional/legacy/prompt_buffer_spec.lua
 | 
6
++++++

2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/src/nvim/mark.c b/src/nvim/mark.c
@@ -146,6 +146,11 @@ int setmark_pos(int c, pos_T *pos, int fnum, fmarkv_T *view_pt)
     return OK;
   }
 
+  if (c == ':' && bt_prompt(buf)) {
+    RESET_FMARK(&buf->b_prompt_start, *pos, buf->b_fnum, view);
+    return OK;
+  }
+
   if (ASCII_ISLOWER(c)) {
     i = c - 'a';
     RESET_FMARK(buf->b_namedm + i, *pos, fnum, view);
@@ -1720,8 +1725,7 @@ bool mark_set_local(const char name, buf_T *const buf, const fmark_T fm, const b
   } else if (name == '^') {
     fm_tgt = &(buf->b_last_insert);
   } else if (name == ':') {
-    // Readonly mark for prompt buffer. Can't be edited on user side.
-    return false;
+    fm_tgt = &(buf->b_prompt_start);
   } else if (name == '.') {
     fm_tgt = &(buf->b_last_change);
   } else {
diff --git a/test/functional/legacy/prompt_buffer_spec.lua b/test/functional/legacy/prompt_buffer_spec.lua
@@ -622,6 +622,12 @@ describe('prompt buffer', function()
     -- ': mark is only available in prompt buffer.
     source('set buftype=')
     eq("Invalid mark name: ':'", t.pcall_err(api.nvim_buf_get_mark, 0, ':'))
+
+    -- mark can be moved
+    source('set buftype=prompt')
+    eq({ 11, 1 }, api.nvim_buf_get_mark(0, ':'))
+    eq(true, api.nvim_buf_set_mark(0, ':', 1, 1, {}))
+    eq({ 1, 1 }, api.nvim_buf_get_mark(0, ':'))
   end)
 
   describe('prompt_getinput', function()