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fix(change): update fold after on_bytes (#26364)

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Problem:
With vim.treesitter.foldexpr, `o`-ing two lines above a folded region
opens the fold. This does not happen with legacy foldexprs. For example,
make a markdown file with the following text (without indentation),
enable treesitter fold, and follow the instruction in the text.

    put cursor on this line and type zoo<Esc>
    initially folded, revealed by zo
    # then this fold will be opened
    initially folded, revealed by o<Esc>

Analysis:
* `o` updates folds first (done in `changed_lines`), evaluating
  foldexpr, and then invokes `on_bytes` (done in `extmark_splice`).
* Treesitter fold allocates the foldinfo for added lines (`add_range`)
  on `on_bytes`.
* Therefore, when treesitter foldexpr is invoked while running `o`, it
  sees outdated foldinfo.

Solution:
`extmark_splice`, and then `changed_lines`. This seems to be the
standard order in other places, e.g., `nvim_buf_set_lines`.
This commit is contained in:
Jaehwang Jung 2023-12-05 09:40:48 +09:00 committed by GitHub
parent c3836e40a2
commit 3159a2c28f
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 4 additions and 4 deletions
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2
src/nvim/change.c
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@ -1839,11 +1839,11 @@ int open_line(int dir, int flags, int second_line_indent, bool *did_do_comment)
curwin->w_cursor.lnum = old_cursor.lnum + 1;
}
if (did_append) {
changed_lines(curbuf, curwin->w_cursor.lnum, 0, curwin->w_cursor.lnum, 1, true);
// bail out and just get the final length of the line we just manipulated
bcount_t extra = (bcount_t)strlen(ml_get(curwin->w_cursor.lnum));
extmark_splice(curbuf, (int)curwin->w_cursor.lnum - 1, 0,
0, 0, 0, 1, 0, 1 + extra, kExtmarkUndo);
changed_lines(curbuf, curwin->w_cursor.lnum, 0, curwin->w_cursor.lnum, 1, true);
}
curbuf_splice_pending--;

6
test/functional/lua/buffer_updates_spec.lua
View File

@ -418,7 +418,7 @@ describe('lua: nvim_buf_attach on_bytes', function()
-- meths.set_option_value('autoindent', true, {})
feed 'Go'
check_events {
{ "test1", "bytes", 1, 4, 7, 0, 114, 0, 0, 0, 1, 0, 1 };
{ "test1", "bytes", 1, 3, 7, 0, 114, 0, 0, 0, 1, 0, 1 };
}
feed '<cr>'
check_events {
@ -431,7 +431,7 @@ describe('lua: nvim_buf_attach on_bytes', function()
meths.set_option_value('autoindent', true, {})
feed 'Go'
check_events {
{ "test1", "bytes", 1, 4, 7, 0, 114, 0, 0, 0, 1, 0, 5 };
{ "test1", "bytes", 1, 3, 7, 0, 114, 0, 0, 0, 1, 0, 5 };
}
feed '<cr>'
check_events {
@ -476,7 +476,7 @@ describe('lua: nvim_buf_attach on_bytes', function()
feed 'ggo' -- goto first line to continue testing
check_events {
{ "test1", "bytes", 1, 6, 1, 0, 11, 0, 0, 0, 1, 0, 4 };
{ "test1", "bytes", 1, 5, 1, 0, 11, 0, 0, 0, 1, 0, 4 };
}
feed '<CR>'