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fix(folds): cursorline highlight is not always applied on closed folds
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Problem:    The cursorline highlight logic checks for `w_cursor.lnum`
            which may be different from the line number passed to
            `win_line()` even when the cursor is actually on that line.
Solution:   Update cursor line highlight logic to check for the line
            number of the start of a closed fold if necessary.

Fix neovim#22232
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@luukvbaal
luukvbaal committed Feb 14, 2023
1 parent 5d3769e commit b919e67
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Showing 4 changed files with 121 additions and 70 deletions.
9 changes: 6 additions & 3 deletions src/nvim/buffer_defs.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1112,20 +1112,23 @@ struct window_S {
win_T *w_prev; ///< link to previous window
win_T *w_next; ///< link to next window
bool w_closing; ///< window is being closed, don't let
/// autocommands close it too.
///< autocommands close it too.

frame_T *w_frame; ///< frame containing this window

pos_T w_cursor; ///< cursor position in buffer

colnr_T w_curswant; ///< Column we want to be at. This is
/// used to try to stay in the same column
/// for up/down cursor motions.
///< used to try to stay in the same column
///< for up/down cursor motions.

int w_set_curswant; // If set, then update w_curswant the next
// time through cursupdate() to the
// current virtual column

linenr_T w_cursorline; ///< Where 'cursorline' should be drawn,
///< can be different from w_cursor.lnum
///< for closed folds.
linenr_T w_last_cursorline; ///< where last 'cursorline' was drawn
pos_T w_last_cursormoved; ///< for CursorMoved event

Expand Down
39 changes: 18 additions & 21 deletions src/nvim/drawline.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -303,7 +303,7 @@ static int draw_virt_text_item(buf_T *buf, int col, VirtText vt, HlMode hl_mode,
static bool use_cursor_line_sign(win_T *wp, linenr_T lnum)
{
return wp->w_p_cul
&& lnum == wp->w_cursor.lnum
&& lnum == wp->w_cursorline
&& (wp->w_p_culopt_flags & CULOPT_NBR);
}

Expand Down Expand Up @@ -517,7 +517,7 @@ static void get_statuscol_display_info(statuscol_T *stcp, LineDrawState *draw_st
static bool use_cursor_line_nr(win_T *wp, linenr_T lnum, int row, int startrow, int filler_lines)
{
return wp->w_p_cul
&& lnum == wp->w_cursor.lnum
&& lnum == wp->w_cursorline
&& (wp->w_p_culopt_flags & CULOPT_NBR)
&& (row == startrow + filler_lines
|| (row > startrow + filler_lines
Expand Down Expand Up @@ -547,6 +547,12 @@ static inline void get_line_number_str(win_T *wp, linenr_T lnum, char *buf, size

static int get_line_number_attr(win_T *wp, linenr_T lnum, int row, int startrow, int filler_lines)
{
if (use_cursor_line_nr(wp, lnum, row, startrow, filler_lines)) {
// TODO(vim): Can we use CursorLine instead of CursorLineNr
// when CursorLineNr isn't set?
return win_hl_attr(wp, HLF_CLN);
}

if (wp->w_p_rnu) {
if (lnum < wp->w_cursor.lnum) {
// Use LineNrAbove
Expand All @@ -558,12 +564,6 @@ static int get_line_number_attr(win_T *wp, linenr_T lnum, int row, int startrow,
}
}

if (use_cursor_line_nr(wp, lnum, row, startrow, filler_lines)) {
// TODO(vim): Can we use CursorLine instead of CursorLineNr
// when CursorLineNr isn't set?
return win_hl_attr(wp, HLF_CLN);
}

return win_hl_attr(wp, HLF_N);
}

Expand Down Expand Up @@ -960,20 +960,17 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, bool nochange,
filler_todo = filler_lines;

// Cursor line highlighting for 'cursorline' in the current window.
if (lnum == wp->w_cursor.lnum) {
// Do not show the cursor line in the text when Visual mode is active,
// because it's not clear what is selected then.
if (wp->w_p_cul && !(wp == curwin && VIsual_active)
&& wp->w_p_culopt_flags != CULOPT_NBR) {
cul_screenline = (wp->w_p_wrap
&& (wp->w_p_culopt_flags & CULOPT_SCRLINE));
if (!cul_screenline) {
apply_cursorline_highlight(wp, lnum, &line_attr, &cul_attr, &line_attr_lowprio);
} else {
margin_columns_win(wp, &left_curline_col, &right_curline_col);
}
area_highlighting = true;
if (wp->w_p_cul && wp->w_p_culopt_flags != CULOPT_NBR && lnum == wp->w_cursorline
// Do not show the cursor line in the text when Visual mode is active,
// because it's not clear what is selected then.
&& !(wp == curwin && VIsual_active)) {
cul_screenline = (wp->w_p_wrap && (wp->w_p_culopt_flags & CULOPT_SCRLINE));
if (!cul_screenline) {
apply_cursorline_highlight(wp, lnum, &line_attr, &cul_attr, &line_attr_lowprio);
} else {
margin_columns_win(wp, &left_curline_col, &right_curline_col);
}
area_highlighting = true;
}

SignTextAttrs sattrs[SIGN_SHOW_MAX]; // sign attributes for the sign column
Expand Down
9 changes: 7 additions & 2 deletions src/nvim/drawscreen.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1549,6 +1549,11 @@ static void win_update(win_T *wp, DecorProviders *providers)
}

bool cursorline_standout = win_cursorline_standout(wp);
// Make sure that the cursorline on a closed fold is redrawn
if (cursorline_standout) {
foldinfo_T cul_fi = fold_info(wp, wp->w_cursor.lnum);
wp->w_cursorline = cul_fi.fi_level && cul_fi.fi_lines ? cul_fi.fi_lnum : wp->w_cursor.lnum;
}

win_check_ns_hl(wp);

Expand Down Expand Up @@ -1604,7 +1609,7 @@ static void win_update(win_T *wp, DecorProviders *providers)
// if lines were inserted or deleted
|| (wp->w_match_head != NULL
&& buf->b_mod_xlines != 0)))))
|| (cursorline_standout && lnum == wp->w_cursor.lnum)
|| (cursorline_standout && lnum == wp->w_cursorline)
|| lnum == wp->w_last_cursorline) {
if (lnum == mod_top) {
top_to_mod = false;
Expand Down Expand Up @@ -1849,7 +1854,7 @@ static void win_update(win_T *wp, DecorProviders *providers)

// Now that the window has been redrawn with the old and new cursor line,
// update w_last_cursorline.
wp->w_last_cursorline = cursorline_standout ? wp->w_cursor.lnum : 0;
wp->w_last_cursorline = cursorline_standout ? wp->w_cursorline : 0;

wp->w_last_cursor_lnum_rnu = wp->w_p_rnu ? wp->w_cursor.lnum : 0;

Expand Down
134 changes: 90 additions & 44 deletions test/functional/ui/fold_spec.lua
View file
Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ local meths = helpers.meths
local exec = helpers.exec
local exec_lua = helpers.exec_lua
local assert_alive = helpers.assert_alive
local poke_eventloop = helpers.poke_eventloop


local content1 = [[
Expand Down Expand Up @@ -90,10 +91,10 @@ describe("folded lines", function()
end)

it("highlights with CursorLineFold when 'cursorline' is set", function()
command("set cursorline foldcolumn=2 foldmethod=marker")
command("set number cursorline foldcolumn=2")
command("hi link CursorLineFold Search")
insert(content1)
feed("zf3j")
feed("ggzf3jj")
if multigrid then
screen:expect([[
## grid 1
Expand All @@ -106,26 +107,26 @@ describe("folded lines", function()
[2:---------------------------------------------]|
[3:---------------------------------------------]|
## grid 2
{7: }This is a |
{7: }valid English |
{7: }sentence composed by |
{7: }an exhausted developer |
{7: }in his cave. |
{6: }{12:^ }|
{7:+ }{8: 1 }{5:+-- 4 lines: This is a················}|
{6: }{9: 5 }{12:^in his cave. }|
{7: }{8: 6 } |
{1:~ }|
{1:~ }|
{1:~ }|
{1:~ }|
## grid 3
|
]])
else
screen:expect([[
{7: }This is a |
{7: }valid English |
{7: }sentence composed by |
{7: }an exhausted developer |
{7: }in his cave. |
{6: }{12:^ }|
{1:~ }|
|
{7:+ }{8: 1 }{5:+-- 4 lines: This is a················}|
{6: }{9: 5 }{12:^in his cave. }|
{7: }{8: 6 } |
{1:~ }|
{1:~ }|
{1:~ }|
{1:~ }|
|
]])
end
feed("k")
Expand All @@ -141,28 +142,36 @@ describe("folded lines", function()
[2:---------------------------------------------]|
[3:---------------------------------------------]|
## grid 2
{7: }This is a |
{7: }valid English |
{7: }sentence composed by |
{7: }an exhausted developer |
{6: }{12:^in his cave. }|
{7: } |
{6:+ }{9: 1 }{12:^+-- 4 lines: This is a················}|
{7: }{8: 5 }in his cave. |
{7: }{8: 6 } |
{1:~ }|
{1:~ }|
{1:~ }|
{1:~ }|
## grid 3
|
]])
else
screen:expect([[
{7: }This is a |
{7: }valid English |
{7: }sentence composed by |
{7: }an exhausted developer |
{6: }{12:^in his cave. }|
{7: } |
{1:~ }|
|
{6:+ }{9: 1 }{12:^+-- 4 lines: This is a················}|
{7: }{8: 5 }in his cave. |
{7: }{8: 6 } |
{1:~ }|
{1:~ }|
{1:~ }|
{1:~ }|
|
]])
end
-- CursorLine is applied correctly with screenrow motions #22232
feed("jgk")
poke_eventloop()
-- CursorLine is applied correctly when closing a fold when cursor is not at fold start
screen:expect_unchanged()
feed("zo4Gzc")
poke_eventloop()
screen:expect_unchanged()
command("set cursorlineopt=line")
if multigrid then
screen:expect([[
Expand All @@ -176,26 +185,63 @@ describe("folded lines", function()
[2:---------------------------------------------]|
[3:---------------------------------------------]|
## grid 2
{7: }This is a |
{7: }valid English |
{7: }sentence composed by |
{7: }an exhausted developer |
{7: }{12:^in his cave. }|
{7: } |
{7:+ }{8: 1 }{12:^+-- 4 lines: This is a················}|
{7: }{8: 5 }in his cave. |
{7: }{8: 6 } |
{1:~ }|
{1:~ }|
{1:~ }|
{1:~ }|
## grid 3
|
]])
else
screen:expect([[
{7: }This is a |
{7: }valid English |
{7: }sentence composed by |
{7: }an exhausted developer |
{7: }{12:^in his cave. }|
{7: } |
{1:~ }|
|
{7:+ }{8: 1 }{12:^+-- 4 lines: This is a················}|
{7: }{8: 5 }in his cave. |
{7: }{8: 6 } |
{1:~ }|
{1:~ }|
{1:~ }|
{1:~ }|
|
]])
end
command("set relativenumber cursorlineopt=number")
feed("jgk")
poke_eventloop()
if multigrid then
screen:expect([[
## grid 1
[2:---------------------------------------------]|
[2:---------------------------------------------]|
[2:---------------------------------------------]|
[2:---------------------------------------------]|
[2:---------------------------------------------]|
[2:---------------------------------------------]|
[2:---------------------------------------------]|
[3:---------------------------------------------]|
## grid 2
{6:+ }{9:1 }{5:^+-- 4 lines: This is a················}|
{7: }{8: 1 }in his cave. |
{7: }{8: 2 } |
{1:~ }|
{1:~ }|
{1:~ }|
{1:~ }|
## grid 3
|
]])
else
screen:expect([[
{6:+ }{9:1 }{5:^+-- 4 lines: This is a················}|
{7: }{8: 1 }in his cave. |
{7: }{8: 2 } |
{1:~ }|
{1:~ }|
{1:~ }|
{1:~ }|
|
]])
end
end)
Expand Down

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