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feat(fold): transparent foldtext

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'foldtext' can be set to an empty string to disable and render the
line with:
  - extmark highlight
  - syntax highlighting
  - search highlighting
  - no line wrapping
  - spelling
  - conceal
  - inline virtual text
  - respects `fillchars:fold`

Currently normal virtual text is not displayed


Co-authored-by: zeertzjq <zeertzjq@outlook.com>
This commit is contained in:
Lewis Russell
2024-01-22 10:13:35 +00:00
committed by GitHub
parent 21b36c7d7f
commit 1233ac467d
7 changed files with 374 additions and 116 deletions
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50
src/nvim/drawline.c
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@@ -944,6 +944,10 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
static char *at_end_str = ""; // used for p_extra when displaying curwin->w_p_lcs_chars.eol
// at end-of-line
const bool has_fold = foldinfo.fi_level != 0 && foldinfo.fi_lines > 0;
const bool has_foldtext = has_fold && *wp->w_p_fdt != NUL;
const bool is_wrapped = wp->w_p_wrap
&& !has_fold; // Never wrap folded lines
int saved_attr2 = 0; // char_attr saved for n_attr
int n_attr3 = 0; // chars with overruling special attr
@@ -1036,7 +1040,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
// trailing white space and/or syntax processing to be done.
extra_check = wp->w_p_lbr;
if (syntax_present(wp) && !wp->w_s->b_syn_error && !wp->w_s->b_syn_slow
&& !has_fold && !end_fill) {
&& !has_foldtext && !end_fill) {
// Prepare for syntax highlighting in this line. When there is an
// error, stop syntax highlighting.
int save_did_emsg = did_emsg;
@@ -1132,7 +1136,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
// handle 'incsearch' and ":s///c" highlighting
} else if (highlight_match
&& wp == curwin
&& !has_fold
&& !has_foldtext
&& lnum >= curwin->w_cursor.lnum
&& lnum <= curwin->w_cursor.lnum + search_match_lines) {
if (lnum == curwin->w_cursor.lnum) {
@@ -1192,7 +1196,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
// 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));
cul_screenline = (is_wrapped && (wp->w_p_culopt_flags & CULOPT_SCRLINE));
if (!cul_screenline) {
apply_cursorline_highlight(wp, &wlv);
} else {
@@ -1315,7 +1319,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
const schar_T lcs_eol = wp->w_p_lcs_chars.eol; // 'eol' value
schar_T lcs_prec_todo = wp->w_p_lcs_chars.prec; // 'prec' until it's been used, then NUL
if (wp->w_p_list && !has_fold && !end_fill) {
if (wp->w_p_list && !has_foldtext && !end_fill) {
if (wp->w_p_lcs_chars.space
|| wp->w_p_lcs_chars.multispace != NULL
|| wp->w_p_lcs_chars.leadmultispace != NULL
@@ -1467,7 +1471,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
}
}
if (col_rows == 0 && !has_fold && !end_fill) {
if (col_rows == 0 && !has_foldtext && !end_fill) {
const int v = (int)(ptr - line);
area_highlighting |= prepare_search_hl_line(wp, lnum, v,
&line, &screen_search_hl, &search_attr,
@@ -1605,6 +1609,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
const bool draw_folded = has_fold && wlv.row == startrow + wlv.filler_lines;
if (draw_folded && wlv.n_extra == 0) {
wlv.char_attr = folded_attr = win_hl_attr(wp, HLF_FL);
decor_attr = 0;
}
int extmark_attr = 0;
@@ -1640,7 +1645,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
&decor_state);
}
if (!has_fold && wp->w_buffer->b_virt_text_inline > 0) {
if (!has_foldtext && wp->w_buffer->b_virt_text_inline > 0) {
handle_inline_virtual_text(wp, &wlv, ptr - line);
if (wlv.n_extra > 0 && wlv.virt_inline_hl_mode <= kHlModeReplace) {
// restore search_attr and area_attr when n_extra is down to zero
@@ -1679,7 +1684,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
area_active = false;
}
if (!has_fold && wlv.n_extra == 0) {
if (!has_foldtext && wlv.n_extra == 0) {
// Check for start/end of 'hlsearch' and other matches.
// After end, check for start/end of next match.
// When another match, have to check for start again.
@@ -1746,7 +1751,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
}
}
if (draw_folded && wlv.n_extra == 0 && wlv.col == win_col_offset) {
if (draw_folded && has_foldtext && wlv.n_extra == 0 && wlv.col == win_col_offset) {
const int v = (int)(ptr - line);
linenr_T lnume = lnum + foldinfo.fi_lines - 1;
memset(buf_fold, ' ', FOLD_TEXT_LEN);
@@ -1765,7 +1770,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
ptr = line + v;
}
if (draw_folded && wlv.n_extra == 0 && wlv.col < grid->cols) {
if (draw_folded && wlv.n_extra == 0 && wlv.col < grid->cols && (has_foldtext || *ptr == NUL)) {
// Fill rest of line with 'fold'.
wlv.sc_extra = wp->w_p_fcs_chars.fold;
wlv.sc_final = NUL;
@@ -1848,7 +1853,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
// initialize these.
mb_c = ' ';
mb_schar = schar_from_ascii(' ');
} else if (has_fold) {
} else if (has_foldtext || (has_fold && wlv.col >= grid->cols)) {
// skip writing the buffer line itself
mb_schar = NUL;
} else {
@@ -1974,6 +1979,10 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
can_spell = TRISTATE_TO_BOOL(decor_state.spell, can_spell);
}
if (folded_attr) {
decor_attr = hl_combine_attr(folded_attr, decor_attr);
}
if (decor_attr) {
if (!attr_pri) {
if (wlv.cul_attr) {
@@ -2388,7 +2397,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
wlv.vcol_off += wlv.n_extra;
}
wlv.vcol += wlv.n_extra;
if (wp->w_p_wrap && wlv.n_extra > 0) {
if (is_wrapped && wlv.n_extra > 0) {
wlv.boguscols += wlv.n_extra;
wlv.col += wlv.n_extra;
}
@@ -2489,7 +2498,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
// Add a blank character to highlight.
linebuf_char[wlv.off] = schar_from_ascii(' ');
}
if (area_attr == 0 && !has_fold) {
if (area_attr == 0 && !has_foldtext) {
// Use attributes from match with highest priority among
// 'search_hl' and the match list.
get_search_match_hl(wp,
@@ -2616,7 +2625,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
}
// When the window is too narrow draw all "@" lines.
if (leftcols_width >= wp->w_grid.cols && wp->w_p_wrap) {
if (leftcols_width >= wp->w_grid.cols && is_wrapped) {
win_draw_end(wp, schar_from_ascii('@'), true, wlv.row, wp->w_grid.rows, HLF_AT);
set_empty_rows(wp, wlv.row);
wlv.row = endrow;
@@ -2627,12 +2636,13 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
// Show "extends" character from 'listchars' if beyond the line end and
// 'list' is set.
// Don't show this with 'wrap' as the line can't be scrolled horizontally.
if (wp->w_p_lcs_chars.ext != NUL
&& wp->w_p_list
&& !wp->w_p_wrap
&& wlv.filler_todo <= 0
&& wlv.col == grid->cols - 1
&& !has_fold) {
&& !has_foldtext) {
if (has_decor && *ptr == NUL && lcs_eol == 0 && lcs_eol_todo) {
// Tricky: there might be a virtual text just _after_ the last char
decor_redraw_col(wp, (colnr_T)(ptr - line), wlv.off, false, &decor_state);
@@ -2714,7 +2724,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
if (wlv.n_extra > 0) {
wlv.vcol_off += wlv.n_extra;
}
if (wp->w_p_wrap) {
if (is_wrapped) {
// Special voodoo required if 'wrap' is on.
//
// Advance the column indicator to force the line
@@ -2782,11 +2792,11 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
if (has_decor && wlv.filler_todo <= 0 && wlv.col >= grid->cols) {
// At the end of screen line: might need to peek for decorations just after
// this position.
if (!has_fold && wp->w_p_wrap && wlv.n_extra == 0) {
if (is_wrapped && wlv.n_extra == 0) {
decor_redraw_col(wp, (colnr_T)(ptr - line), -3, false, &decor_state);
// Check position/hiding of virtual text again on next screen line.
decor_need_recheck = true;
} else if (has_fold || !wp->w_p_wrap) {
} else if (!is_wrapped) {
// Without wrapping, we might need to display right_align and win_col
// virt_text for the entire text line.
decor_redraw_col(wp, MAXCOL, -1, true, &decor_state);
@@ -2795,14 +2805,14 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
// At end of screen line and there is more to come: Display the line
// so far. If there is no more to display it is caught above.
if (wlv.col >= grid->cols && (!has_fold || virt_line_offset >= 0)
if (wlv.col >= grid->cols && (!has_foldtext || virt_line_offset >= 0)
&& (*ptr != NUL
|| wlv.filler_todo > 0
|| (wp->w_p_list && wp->w_p_lcs_chars.eol != NUL
&& wlv.p_extra != at_end_str)
|| (wlv.n_extra != 0 && (wlv.sc_extra != NUL || *wlv.p_extra != NUL))
|| has_more_inline_virt(&wlv, ptr - line))) {
const bool wrap = wp->w_p_wrap // Wrapping enabled.
const bool wrap = is_wrapped // Wrapping enabled (not a folded line).
&& wlv.filler_todo <= 0 // Not drawing diff filler lines.
&& lcs_eol_todo // Haven't printed the lcs_eol character.
&& wlv.row != endrow - 1 // Not the last line being displayed.
@@ -2835,7 +2845,7 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
// When not wrapping and finished diff lines, or when displayed
// '$' and highlighting until last column, break here.
if ((!wp->w_p_wrap && wlv.filler_todo <= 0) || !lcs_eol_todo) {
if ((!is_wrapped && wlv.filler_todo <= 0) || !lcs_eol_todo) {
break;
}