/*
* Return appropriate space number for breakindent, taking influencing
* parameters into account. Window must be specified, since it is not
* necessarily always the current one.
*/
int get_breakindent_win(win_T *wp, char_u *line) {
static int prev_indent = 0; /* cached indent value */
static int prev_ts = 0L; /* cached tabstop value */
static char_u *prev_line = NULL; /* cached pointer to line */
int bri = 0;
/* window width minus window margin space, i.e. what rests for text */
const int eff_wwidth = wp->w_width
- ((wp->w_p_nu || wp->w_p_rnu)
&& (vim_strchr(p_cpo, CPO_NUMCOL) == NULL)
? number_width(wp) + 1 : 0);
/* used cached indent, unless pointer or 'tabstop' changed */
if (prev_line != line || prev_ts != wp->w_buffer->b_p_ts)
{
prev_line = line;
prev_ts = wp->w_buffer->b_p_ts;
prev_indent = get_indent_str(line,
(int)wp->w_buffer->b_p_ts, wp->w_p_list);
}
bri = prev_indent + wp->w_p_brishift;
/* indent minus the length of the showbreak string */
if (wp->w_p_brisbr)
bri -= vim_strsize(p_sbr);
/* Add offset for number column, if 'n' is in 'cpoptions' */
bri += win_col_off2(wp);
/* never indent past left window margin */
if (bri < 0)
bri = 0;
/* always leave at least bri_min characters on the left,
* if text width is sufficient */
else if (bri > eff_wwidth - wp->w_p_brimin)
bri = (eff_wwidth - wp->w_p_brimin < 0)
? 0 : eff_wwidth - wp->w_p_brimin;
return bri;
}
// Compute the position in the buffer line from the posn on the screen in
// window "win".
// Returns true if the position is below the last line.
bool mouse_comp_pos(win_T *win, int *rowp, int *colp, linenr_T *lnump)
{
int col = *colp;
int row = *rowp;
linenr_T lnum;
bool retval = false;
int off;
int count;
if (win->w_p_rl)
col = win->w_width - 1 - col;
lnum = win->w_topline;
while (row > 0) {
// Don't include filler lines in "count"
if (win->w_p_diff
&& !hasFoldingWin(win, lnum, NULL, NULL, true, NULL)) {
if (lnum == win->w_topline) {
row -= win->w_topfill;
} else {
row -= diff_check_fill(win, lnum);
}
count = plines_win_nofill(win, lnum, true);
} else {
count = plines_win(win, lnum, true);
}
if (count > row) {
break; // Position is in this buffer line.
}
(void)hasFoldingWin(win, lnum, NULL, &lnum, true, NULL);
if (lnum == win->w_buffer->b_ml.ml_line_count) {
retval = true;
break; // past end of file
}
row -= count;
++lnum;
}
if (!retval) {
// Compute the column without wrapping.
off = win_col_off(win) - win_col_off2(win);
if (col < off)
col = off;
col += row * (win->w_width - off);
// add skip column (for long wrapping line)
col += win->w_skipcol;
}
if (!win->w_p_wrap) {
col += win->w_leftcol;
}
// skip line number and fold column in front of the line
col -= win_col_off(win);
if (col < 0) {
col = 0;
}
*colp = col;
*rowp = row;
*lnump = lnum;
return retval;
}
// Adjust the clicked column position if there are concealed characters
// before the current column. But only when it's absolutely necessary.
static int mouse_adjust_click(win_T *wp, int row, int col)
{
if (!(wp->w_p_cole > 0 && curbuf->b_p_smc > 0
&& wp->w_leftcol < curbuf->b_p_smc && conceal_cursor_line(wp))) {
return col;
}
int end = (colnr_T)STRLEN(ml_get(wp->w_cursor.lnum));
int vend = getviscol2(end, 0);
if (col >= vend) {
return col;
}
int i = wp->w_leftcol;
if (row > 0) {
i += row * (wp->w_width - win_col_off(wp) - win_col_off2(wp)
- wp->w_leftcol) + wp->w_skipcol;
}
int start_col = i;
int matchid;
int last_matchid;
int bcol = end - (vend - col);
while (i < bcol) {
matchid = syn_get_concealed_id(wp, wp->w_cursor.lnum, i);
if (matchid != 0) {
if (wp->w_p_cole == 3) {
bcol++;
} else {
if (row > 0 && i == start_col) {
// Check if the current concealed character is actually part of
// the previous wrapped row's conceal group.
last_matchid = syn_get_concealed_id(wp, wp->w_cursor.lnum,
i - 1);
if (last_matchid == matchid) {
bcol++;
}
} else if (wp->w_p_cole == 1
|| (wp->w_p_cole == 2
&& (lcs_conceal != NUL
|| syn_get_sub_char() != NUL))) {
// At least one placeholder character will be displayed.
bcol--;
}
last_matchid = matchid;
// Adjust for concealed text that spans more than one character.
do {
i++;
bcol++;
matchid = syn_get_concealed_id(wp, wp->w_cursor.lnum, i);
} while (last_matchid == matchid);
continue;
}
}
i++;
}
return getviscol2(bcol, 0);
}
/// Adjusts the clicked column position when 'conceallevel' > 0
static int mouse_adjust_click(win_T *wp, int row, int col)
{
if (!(wp->w_p_cole > 0 && curbuf->b_p_smc > 0
&& wp->w_leftcol < curbuf->b_p_smc && conceal_cursor_line(wp))) {
return col;
}
// `col` is the position within the current line that is highlighted by the
// cursor without consideration for concealed characters. The current line is
// scanned *up to* `col`, nudging it left or right when concealed characters
// are encountered.
//
// chartabsize() is used to keep track of the virtual column position relative
// to the line's bytes. For example: if col == 9 and the line starts with a
// tab that's 8 columns wide, we would want the cursor to be highlighting the
// second byte, not the ninth.
linenr_T lnum = wp->w_cursor.lnum;
char_u *line = ml_get(lnum);
char_u *ptr = line;
char_u *ptr_end = line;
char_u *ptr_row_offset = line; // Where we begin adjusting `ptr_end`
// Find the offset where scanning should begin.
int offset = wp->w_leftcol;
if (row > 0) {
offset += row * (wp->w_width - win_col_off(wp) - win_col_off2(wp) -
wp->w_leftcol + wp->w_skipcol);
}
int vcol;
if (offset) {
// Skip everything up to an offset since nvim takes care of displaying the
// correct portion of the line when horizontally scrolling.
// When 'wrap' is enabled, only the row (of the wrapped line) needs to be
// checked for concealed characters.
vcol = 0;
while (vcol < offset && *ptr != NUL) {
vcol += chartabsize(ptr, vcol);
ptr += utfc_ptr2len(ptr);
}
ptr_row_offset = ptr;
}
// Align `ptr_end` with `col`
vcol = offset;
ptr_end = ptr_row_offset;
while (vcol < col && *ptr_end != NUL) {
vcol += chartabsize(ptr_end, vcol);
ptr_end += utfc_ptr2len(ptr_end);
}
int matchid;
int prev_matchid;
int nudge = 0;
int cwidth = 0;
vcol = offset;
#define incr() nudge++; ptr_end += utfc_ptr2len(ptr_end)
#define decr() nudge--; ptr_end -= utfc_ptr2len(ptr_end)
while (ptr < ptr_end && *ptr != NUL) {
cwidth = chartabsize(ptr, vcol);
vcol += cwidth;
if (cwidth > 1 && *ptr == '\t' && nudge > 0) {
// A tab will "absorb" any previous adjustments.
cwidth = MIN(cwidth, nudge);
while (cwidth > 0) {
decr();
cwidth--;
}
}
matchid = syn_get_concealed_id(wp, lnum, (colnr_T)(ptr - line));
if (matchid != 0) {
if (wp->w_p_cole == 3) {
incr();
} else {
if (!(row > 0 && ptr == ptr_row_offset)
&& (wp->w_p_cole == 1 || (wp->w_p_cole == 2
&& (lcs_conceal != NUL
|| syn_get_sub_char() != NUL)))) {
// At least one placeholder character will be displayed.
decr();
}
prev_matchid = matchid;
while (prev_matchid == matchid && *ptr != NUL) {
incr();
ptr += utfc_ptr2len(ptr);
matchid = syn_get_concealed_id(wp, lnum, (colnr_T)(ptr - line));
}
continue;
}
}
ptr += utfc_ptr2len(ptr);
}
return col + nudge;
}
