int64_t word_wrap(buffer * const b) {
const int64_t len = b->cur_line_desc->line_len;
char * const line = b->cur_line_desc->line;
int64_t pos, first_pos;
if (!(pos = b->cur_pos)) return ERROR;
/* Find the first possible position we could break a line on. */
first_pos = 0;
/* Skip leading white space */
while (first_pos < len && ne_isspace(get_char(&line[first_pos], b->encoding), b->encoding)) first_pos = next_pos(line, first_pos, b->encoding);
/* Skip non_space after leading white space */
while (first_pos < len && !ne_isspace(get_char(&line[first_pos], b->encoding), b->encoding)) first_pos = next_pos(line, first_pos, b->encoding);
/* Now we know that the line shouldn't be broken before &line[first_pos]. */
/* Search left from the current position to find a candidate space to break the line on.*/
while((pos = prev_pos(line, pos, b->encoding)) && !ne_isspace(get_char(&line[pos], b->encoding), b->encoding));
if (! pos || pos < first_pos) return ERROR;
start_undo_chain(b);
const int64_t result = b->cur_pos - pos - 1;
if (pos < b->cur_pos) b->cur_pos = -1;
delete_one_char(b, b->cur_line_desc, b->cur_line, pos);
insert_one_line(b, b->cur_line_desc, b->cur_line, pos);
end_undo_chain(b);
return result;
}
int word_wrap2(buffer * const b) {
static char avcmd[16];
if (b->cur_pos > b->cur_line_desc->line_len) return OK;
bool non_blank_added = false;
int avshift;
char * line = b->cur_line_desc->line;
int64_t pos, original_line;
/* If the char to our left is a space, we need to insert
a non-space to attach our WORDWRAP_BOOKMARK to because
spaces at the split point get removed, which effectively
leaves our bookmark on the current line. */
delay_update();
pos = prev_pos(line, b->cur_pos, b->encoding);
if (pos >= 0 && (non_blank_added = ne_isspace(get_char(&line[pos], b->encoding), b->encoding))) {
start_undo_chain(b);
insert_one_char(b, b->cur_line_desc, b->cur_line, b->cur_pos, 'X');
line = b->cur_line_desc->line;
goto_pos(b, next_pos(line, b->cur_pos, b->encoding));
}
b->bookmark[WORDWRAP_BOOKMARK].pos = b->cur_pos;
b->bookmark[WORDWRAP_BOOKMARK].line = original_line = b->cur_line;
b->bookmark[WORDWRAP_BOOKMARK].cur_y = b->cur_y;
b->bookmark_mask |= (1 << WORDWRAP_BOOKMARK);
paragraph(b);
goto_line_pos(b, b->bookmark[WORDWRAP_BOOKMARK].line, b->bookmark[WORDWRAP_BOOKMARK].pos);
line = b->cur_line_desc->line;
b->bookmark[WORDWRAP_BOOKMARK].cur_y += b->bookmark[WORDWRAP_BOOKMARK].line - original_line;
if (avshift = b->cur_y - b->bookmark[WORDWRAP_BOOKMARK].cur_y) {
snprintf(avcmd, 16, "%c%d", avshift > 0 ? 'T' :'B', avshift > 0 ? avshift : -avshift);
adjust_view(b, avcmd);
}
b->bookmark_mask &= ~(1 << WORDWRAP_BOOKMARK);
if (non_blank_added) {
goto_pos(b, prev_pos(b->cur_line_desc->line, b->cur_pos, b->encoding));
delete_one_char(b, b->cur_line_desc, b->cur_line, b->cur_pos);
end_undo_chain(b);
}
return stop ? STOPPED : OK;
}
static void
delete_char(InputItem *sym)
{
if (delete_one_char(sym))
update_inputsymbol(sym);
}