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vim-patch:8.1.1631: displaying signs is inefficient

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+ support for neovim's dynamic width signcolumn

Problem:    Displaying signs is inefficient.
Solution:   Avoid making multiple calls to get information about a placed
            sign. (Yegappan Lakshmanan, closes #4586)
This commit is contained in:
Lewis Russell
2021-03-21 00:00:50 +00:00
parent 804ea22944
commit 0b7e5eeb62
4 changed files with 121 additions and 100 deletions
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37
src/nvim/screen.c
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@@ -2084,6 +2084,8 @@ static int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow,
colnr_T trailcol = MAXCOL; // start of trailing spaces
colnr_T leadcol = 0; // start of leading spaces
bool need_showbreak = false; // overlong line, skip first x chars
sign_attrs_T sattrs[SIGN_SHOW_MAX]; // attributes for signs
int num_signs; // number of signs for line
int line_attr = 0; // attribute for the whole line
int line_attr_lowprio = 0; // low-priority attribute for the line
matchitem_T *cur; // points to the match list
@@ -2375,11 +2377,14 @@ static int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow,
wp->w_last_cursorline = wp->w_cursor.lnum;
}
memset(sattrs, 0, sizeof(sattrs));
num_signs = buf_get_signattrs(wp->w_buffer, lnum, sattrs);
// If this line has a sign with line highlighting set line_attr.
// TODO(bfredl, vigoux): this should not take priority over decoration!
v = buf_getsigntype(wp->w_buffer, lnum, SIGN_LINEHL, 0, 1);
if (v != 0) {
line_attr = sign_get_attr((int)v, SIGN_LINEHL);
sign_attrs_T * sattr = sign_get_attr(SIGN_LINEHL, sattrs, 0, 1);
if (sattr != NULL) {
line_attr = sattr->linehl;
}
// Highlight the current line in the quickfix window.
@@ -2696,7 +2701,7 @@ static int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow,
int count = win_signcol_count(wp);
if (count > 0) {
get_sign_display_info(
false, wp, lnum, row,
false, wp, sattrs, row,
startrow, filler_lines, filler_todo, count,
&c_extra, &c_final, extra, sizeof(extra),
&p_extra, &n_extra,
@@ -2715,10 +2720,10 @@ static int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow,
// in 'lnum', then display the sign instead of the line
// number.
if (*wp->w_p_scl == 'n' && *(wp->w_p_scl + 1) == 'u'
&& buf_findsign_id(wp->w_buffer, lnum, (char_u *)"*") != 0) {
&& num_signs > 0) {
int count = win_signcol_count(wp);
get_sign_display_info(
true, wp, lnum, row,
true, wp, sattrs, row,
startrow, filler_lines, filler_todo, count,
&c_extra, &c_final, extra, sizeof(extra),
&p_extra, &n_extra,
@@ -2768,11 +2773,10 @@ static int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow,
n_extra = number_width(wp) + 1;
char_attr = win_hl_attr(wp, HLF_N);
int num_sign = buf_getsigntype(
wp->w_buffer, lnum, SIGN_NUMHL, 0, 1);
if (num_sign != 0) {
sign_attrs_T *num_sattr = sign_get_attr(SIGN_NUMHL, sattrs, 0, 1);
if (num_sattr != NULL) {
// :sign defined with "numhl" highlight.
char_attr = sign_get_attr(num_sign, SIGN_NUMHL);
char_attr = num_sattr->numhl;
} else if ((wp->w_p_cul || wp->w_p_rnu)
&& lnum == wp->w_cursor.lnum
&& filler_todo == 0) {
@@ -4451,7 +4455,7 @@ void screen_adjust_grid(ScreenGrid **grid, int *row_off, int *col_off)
static void get_sign_display_info(
bool nrcol,
win_T *wp,
linenr_T lnum,
sign_attrs_T sattrs[],
int row,
int startrow,
int filler_lines,
@@ -4468,8 +4472,6 @@ static void get_sign_display_info(
int *sign_idxp
)
{
int text_sign;
// Draw cells with the sign value or blank.
*c_extrap = ' ';
*c_finalp = NUL;
@@ -4481,10 +4483,9 @@ static void get_sign_display_info(
}
if (row == startrow + filler_lines && filler_todo <= 0) {
text_sign = buf_getsigntype(wp->w_buffer, lnum, SIGN_TEXT,
*sign_idxp, count);
if (text_sign != 0) {
*pp_extra = sign_get_text(text_sign);
sign_attrs_T *sattr = sign_get_attr(SIGN_TEXT, sattrs, *sign_idxp, count);
if (sattr != NULL) {
*pp_extra = sattr->text;
if (*pp_extra != NULL) {
*c_extrap = NUL;
*c_finalp = NUL;
@@ -4517,7 +4518,7 @@ static void get_sign_display_info(
(*pp_extra)[*n_extrap] = NUL;
}
}
*char_attrp = sign_get_attr(text_sign, SIGN_TEXT);
*char_attrp = sattr->texthl;
}
}