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perf: cache breakindent/showbreak width in win_lbr_chartabsize

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breakindent was recomputed on every call to win_lbr_charbabsize() when the character
is past the end of the first row of a wrapped line. Even though the function for computing
breakindent cached the last result, reusing the cached value required strcmp of the cached line with the given line.
This commit is contained in:
VanaIgr
2023-12-13 13:25:48 -06:00
parent 77c3d66be9
commit a9c551e5e3
3 changed files with 44 additions and 34 deletions
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64
src/nvim/plines.c
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@@ -109,8 +109,8 @@ void win_linetabsize_cts(chartabsize_T *cts, colnr_T len)
cts->cts_vcol += win_lbr_chartabsize(cts, NULL);
}
// check for inline virtual text after the end of the line
if (len == MAXCOL && cts->cts_has_virt_text && *cts->cts_ptr == NUL) {
win_lbr_chartabsize(cts, NULL);
if (len == MAXCOL && cts->virt_row >= 0 && *cts->cts_ptr == NUL) {
(void)win_lbr_chartabsize(cts, NULL);
cts->cts_vcol += cts->cts_cur_text_width_left + cts->cts_cur_text_width_right;
}
}
@@ -129,14 +129,14 @@ void init_chartabsize_arg(chartabsize_T *cts, win_T *wp, linenr_T lnum, colnr_T
cts->cts_max_head_vcol = 0;
cts->cts_cur_text_width_left = 0;
cts->cts_cur_text_width_right = 0;
cts->cts_has_virt_text = false;
cts->cts_row = lnum - 1;
cts->virt_row = -1;
cts->indent_width = INT_MIN;
if (cts->cts_row >= 0 && wp->w_buffer->b_virt_text_inline > 0) {
marktree_itr_get(wp->w_buffer->b_marktree, cts->cts_row, 0, cts->cts_iter);
if (lnum > 0 && wp->w_buffer->b_virt_text_inline > 0) {
marktree_itr_get(wp->w_buffer->b_marktree, lnum - 1, 0, cts->cts_iter);
MTKey mark = marktree_itr_current(cts->cts_iter);
if (mark.pos.row == cts->cts_row) {
cts->cts_has_virt_text = true;
if (mark.pos.row == lnum - 1) {
cts->virt_row = lnum - 1;
}
}
}
@@ -154,7 +154,7 @@ void clear_chartabsize_arg(chartabsize_T *cts)
int lbr_chartabsize(chartabsize_T *cts)
{
if (!curwin->w_p_lbr && *get_showbreak_value(curwin) == NUL
&& !curwin->w_p_bri && !cts->cts_has_virt_text) {
&& !curwin->w_p_bri && cts->virt_row < 0) {
if (curwin->w_p_wrap) {
return win_nolbr_chartabsize(cts, NULL);
}
@@ -199,9 +199,11 @@ int win_lbr_chartabsize(chartabsize_T *cts, int *headp)
cts->cts_cur_text_width_left = 0;
cts->cts_cur_text_width_right = 0;
char *const sbr = get_showbreak_value(wp);
// No 'linebreak', 'showbreak' and 'breakindent': return quickly.
if (!wp->w_p_lbr && !wp->w_p_bri && *get_showbreak_value(wp) == NUL
&& !cts->cts_has_virt_text) {
if (!wp->w_p_lbr && !wp->w_p_bri && *sbr == NUL
&& cts->virt_row < 0) {
if (wp->w_p_wrap) {
return win_nolbr_chartabsize(cts, headp);
}
@@ -217,12 +219,12 @@ int win_lbr_chartabsize(chartabsize_T *cts, int *headp)
}
bool is_doublewidth = size == 2 && MB_BYTE2LEN((uint8_t)(*s)) > 1;
if (cts->cts_has_virt_text) {
if (cts->virt_row >= 0) {
int tab_size = size;
int col = (int)(s - line);
while (true) {
MTKey mark = marktree_itr_current(cts->cts_iter);
if (mark.pos.row != cts->cts_row || mark.pos.col > col) {
if (mark.pos.row != cts->virt_row || mark.pos.col > col) {
break;
} else if (mark.pos.col == col) {
if (!mt_end(mark) && mark.flags & (MT_FLAG_DECOR_VIRT_TEXT_INLINE)) {
@@ -260,7 +262,6 @@ int win_lbr_chartabsize(chartabsize_T *cts, int *headp)
// May have to add something for 'breakindent' and/or 'showbreak'
// string at the start of a screen line.
int head = mb_added;
char *const sbr = get_showbreak_value(wp);
// When "size" is 0, no new screen line is started.
if (size > 0 && wp->w_p_wrap && (*sbr != NUL || wp->w_p_bri)) {
int col_off_prev = win_col_off(wp);
@@ -277,11 +278,16 @@ int win_lbr_chartabsize(chartabsize_T *cts, int *headp)
if (wcol >= width2 && width2 > 0) {
wcol %= width2;
}
if (*sbr != NUL) {
head_prev += vim_strsize(sbr);
}
if (wp->w_p_bri) {
head_prev += get_breakindent_win(wp, line);
head_prev = cts->indent_width;
if (head_prev == INT_MIN) {
head_prev = 0;
if (*sbr != NUL) {
head_prev += vim_strsize(sbr);
}
if (wp->w_p_bri) {
head_prev += get_breakindent_win(wp, line);
}
cts->indent_width = head_prev;
}
if (wcol < head_prev) {
head_prev -= wcol;
@@ -298,12 +304,16 @@ int win_lbr_chartabsize(chartabsize_T *cts, int *headp)
if (wcol + size > wp->w_width) {
// cells taken by 'showbreak'/'breakindent' halfway current char
int head_mid = 0;
if (*sbr != NUL) {
head_mid += vim_strsize(sbr);
}
if (wp->w_p_bri) {
head_mid += get_breakindent_win(wp, line);
int head_mid = cts->indent_width;
if (head_mid == INT_MIN) {
head_mid = 0;
if (*sbr != NUL) {
head_mid += vim_strsize(sbr);
}
if (wp->w_p_bri) {
head_mid += get_breakindent_win(wp, line);
}
cts->indent_width = head_mid;
}
if (head_mid > 0 && wcol + size > wp->w_width_inner) {
// Calculate effective window width.
@@ -520,7 +530,7 @@ void getvcol(win_T *wp, pos_T *pos, colnr_T *start, colnr_T *cursor, colnr_T *en
&& !wp->w_p_lbr
&& *get_showbreak_value(wp) == NUL
&& !wp->w_p_bri
&& !cts.cts_has_virt_text) {
&& cts.virt_row < 0) {
while (true) {
head = 0;
int c = (uint8_t)(*ptr);
@@ -800,7 +810,7 @@ int plines_win_nofold(win_T *wp, linenr_T lnum)
char *s = ml_get_buf(wp->w_buffer, lnum);
chartabsize_T cts;
init_chartabsize_arg(&cts, wp, lnum, 0, s, s);
if (*s == NUL && !cts.cts_has_virt_text) {
if (*s == NUL && cts.virt_row < 0) {
return 1; // be quick for an empty line
}
win_linetabsize_cts(&cts, (colnr_T)MAXCOL);