static char *
cmd_capture_pane_history(struct args *args, struct cmd_q *cmdq,
struct window_pane *wp, size_t *len)
{
struct grid *gd;
const struct grid_line *gl;
struct grid_cell *gc = NULL;
int n, with_codes, escape_c0, join_lines;
u_int i, sx, top, bottom, tmp;
char *cause, *buf, *line;
const char *Sflag, *Eflag;
size_t linelen;
sx = screen_size_x(&wp->base);
if (args_has(args, 'a')) {
gd = wp->saved_grid;
if (gd == NULL) {
if (!args_has(args, 'q')) {
cmdq_error(cmdq, "no alternate screen");
return (NULL);
}
return (xstrdup(""));
}
} else
gd = wp->base.grid;
Sflag = args_get(args, 'S');
if (Sflag != NULL && strcmp(Sflag, "-") == 0)
top = 0;
else {
n = args_strtonum(args, 'S', INT_MIN, SHRT_MAX, &cause);
if (cause != NULL) {
top = gd->hsize;
free(cause);
} else if (n < 0 && (u_int) -n > gd->hsize)
top = 0;
else
top = gd->hsize + n;
if (top > gd->hsize + gd->sy - 1)
top = gd->hsize + gd->sy - 1;
}
Eflag = args_get(args, 'E');
if (Eflag != NULL && strcmp(Eflag, "-") == 0)
bottom = gd->hsize + gd->sy - 1;
else {
n = args_strtonum(args, 'E', INT_MIN, SHRT_MAX, &cause);
if (cause != NULL) {
bottom = gd->hsize + gd->sy - 1;
free(cause);
} else if (n < 0 && (u_int) -n > gd->hsize)
bottom = 0;
else
bottom = gd->hsize + n;
if (bottom > gd->hsize + gd->sy - 1)
bottom = gd->hsize + gd->sy - 1;
}
if (bottom < top) {
tmp = bottom;
bottom = top;
top = tmp;
}
with_codes = args_has(args, 'e');
escape_c0 = args_has(args, 'C');
join_lines = args_has(args, 'J');
buf = NULL;
for (i = top; i <= bottom; i++) {
line = grid_string_cells(gd, 0, i, sx, &gc, with_codes,
escape_c0, !join_lines);
linelen = strlen(line);
buf = cmd_capture_pane_append(buf, len, line, linelen);
gl = grid_peek_line(gd, i);
if (!join_lines || !(gl->flags & GRID_LINE_WRAPPED))
buf[(*len)++] = '\n';
free(line);
}
return (buf);
}
/* Convert cells into a string. */
char *
grid_string_cells(struct grid *gd, u_int px, u_int py, u_int nx,
struct grid_cell **lastgc, int with_codes, int escape_c0, int trim)
{
struct grid_cell gc;
static struct grid_cell lastgc1;
const char *data;
char *buf, code[128];
size_t len, off, size, codelen;
u_int xx;
const struct grid_line *gl;
if (lastgc != NULL && *lastgc == NULL) {
memcpy(&lastgc1, &grid_default_cell, sizeof lastgc1);
*lastgc = &lastgc1;
}
len = 128;
buf = xmalloc(len);
off = 0;
gl = grid_peek_line(gd, py);
for (xx = px; xx < px + nx; xx++) {
if (gl == NULL || xx >= gl->cellsize)
break;
grid_get_cell(gd, xx, py, &gc);
if (gc.flags & GRID_FLAG_PADDING)
continue;
if (with_codes) {
grid_string_cells_code(*lastgc, &gc, code, sizeof code,
escape_c0);
codelen = strlen(code);
memcpy(*lastgc, &gc, sizeof **lastgc);
} else
codelen = 0;
data = gc.data.data;
size = gc.data.size;
if (escape_c0 && size == 1 && *data == '\\') {
data = "\\\\";
size = 2;
}
while (len < off + size + codelen + 1) {
buf = xreallocarray(buf, 2, len);
len *= 2;
}
if (codelen != 0) {
memcpy(buf + off, code, codelen);
off += codelen;
}
memcpy(buf + off, data, size);
off += size;
}
if (trim) {
while (off > 0 && buf[off - 1] == ' ')
off--;
}
buf[off] = '\0';
return (buf);
}
