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Fix regex searching with wrapped lines, from Anindya Mukherjee; GitHub

Browse Source 
issue 2570.
This commit is contained in:
nicm 2021-02-22 08:31:19 +00:00
parent 6876381276
commit 5f425ee318
1 changed files with 58 additions and 1 deletions
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59
window-copy.c
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@ -73,6 +73,8 @@ static int window_copy_search_marks(struct window_mode_entry *,
static void window_copy_clear_marks(struct window_mode_entry *);
static void window_copy_move_left(struct screen *, u_int *, u_int *, int);
static int window_copy_is_lowercase(const char *);
static void window_copy_search_back_overlap(struct grid *, regex_t *,
u_int *, u_int *, u_int *, u_int);
static int window_copy_search_jump(struct window_mode_entry *,
struct grid *, struct grid *, u_int, u_int, u_int, int, int,
int, int, u_int *);
@ -2912,6 +2914,48 @@ window_copy_is_lowercase(const char *ptr)
return (1);
}
/*
* Handle backward wrapped regex searches with overlapping matches. In this case
* find the longest overlapping match from previous wrapped lines.
*/
static void
window_copy_search_back_overlap(struct grid *gd, regex_t *preg, u_int *ppx,
u_int *psx, u_int *ppy, u_int endline)
{
u_int endx, endy, oldendx, oldendy, px, py, sx;
int found = 1;
oldendx = *ppx + *psx;
oldendy = *ppy - 1;
while (oldendx > gd->sx - 1) {
oldendx -= gd->sx;
oldendy++;
}
endx = oldendx;
endy = oldendy;
px = *ppx;
py = *ppy;
while (found && px == 0 && py - 1 > endline &&
grid_get_line(gd, py - 2)->flags & GRID_LINE_WRAPPED &&
endx == oldendx && endy == oldendy) {
py--;
found = window_copy_search_rl_regex(gd, &px, &sx, py - 1, 0,
gd->sx, preg);
if (found) {
endx = px + sx;
endy = py - 1;
while (endx > gd->sx - 1) {
endx -= gd->sx;
endy++;
}
if (endx == oldendx && endy == oldendy) {
*ppx = px;
*ppy = py;
}
}
}
}
/*
* Search for text stored in sgd starting from position fx,fy up to endline. If
* found, jump to it. If cis then ignore case. The direction is 0 for searching
@ -2964,6 +3008,10 @@ window_copy_search_jump(struct window_mode_entry *wme, struct grid *gd,
if (regex) {
found = window_copy_search_rl_regex(gd,
&px, &sx, i - 1, 0, fx + 1, &reg);
if (found) {
window_copy_search_back_overlap(gd,
&reg, &px, &sx, &i, endline);
}
} else {
found = window_copy_search_rl(gd, sgd,
&px, i - 1, 0, fx + 1, cis);
@ -3048,6 +3096,12 @@ window_copy_search(struct window_mode_entry *wme, int direction, int regex,
if (found) {
window_copy_search_marks(wme, &ss, regex, visible_only);
if (foundlen != 0) {
/* Adjust for wrapped lines eating one right. */
i = data->cx + foundlen;
while (i > gd->sx - 1) {
i -= gd->sx;
window_copy_cursor_right(wme, 1);
}
for (i = 0; i < foundlen; i++)
window_copy_cursor_right(wme, 1);
}
@ -3164,8 +3218,11 @@ again:
if (window_copy_search_mark_at(data, px, py, &b) == 0) {
if (b + width > gd->sx * gd->sy)
width = (gd->sx * gd->sy) - b;
for (i = b; i < b + width; i++)
for (i = b; i < b + width; i++) {
if (data->searchmark[i] != 0)
continue;
data->searchmark[i] = data->searchgen;
}
if (data->searchgen == UCHAR_MAX)
data->searchgen = 1;
else