/* After a resize, clear all the lines that were occupied by prompt + line buffer before the resize */
static
void wipe_textarea(struct winsize *old_winsize)
{
int point, lineheight, linelength, cursor_height, i, promptlength;
if (!prompt_is_single_line()) { /* Don't need to do anything in horizontal_scroll_mode */
promptlength = colourless_strlen((saved_rl_state.cooked_prompt ? saved_rl_state.cooked_prompt: saved_rl_state.raw_prompt), NULL, old_winsize -> ws_col);
linelength = (within_line_edit ? strlen(rl_line_buffer) : 0) + promptlength;
point = (within_line_edit ? rl_point : 0) + promptlength;
assert(old_winsize -> ws_col > 0);
lineheight = (linelength == 0 ? 0 : (1 + (max(point, (linelength - 1)) / old_winsize -> ws_col)));
if (lineheight > 1 && term_cursor_up != NULL && term_cursor_down != NULL) {
/* i.e. if we have multiple rows displayed, and we can clean them up first */
cr();
cursor_height = point / old_winsize -> ws_col; /* cursor is still on old line */
DPRINTF2(DEBUG_SIGNALS, "lineheight: %d, cursor_height: %d", lineheight, cursor_height);
for (i = 1 + cursor_height; i < lineheight; i++)
curs_down(); /* ...move it down to last line */
for (i = lineheight; i > 1; i--) { /* go up again, erasing every line */
clear_line();
curs_up();
}
}
clear_line();
cr();
}
}
void
move_cursor_to_start_of_prompt(int erase)
{
int termwidth = winsize.ws_col;
int promptlen_on_screen, number_of_lines_in_prompt, curpos, count;
int cooked = (saved_rl_state.cooked_prompt != NULL);
DPRINTF2(DEBUG_READLINE,"prompt_is_still_uncooked: %d, impatient_prompt: %d", prompt_is_still_uncooked, impatient_prompt);
if (prompt_is_still_uncooked && ! impatient_prompt)
return; /* @@@ is this necessary ?*/
promptlen_on_screen = colourless_strlen_unmarked(saved_rl_state.cooked_prompt ? saved_rl_state.cooked_prompt : saved_rl_state.raw_prompt, termwidth);
curpos = (within_line_edit ? 1 : 0); /* if the user has pressed a key the cursor will be 1 past the current prompt */
assert(termwidth > 0);
number_of_lines_in_prompt = 1 + ((promptlen_on_screen + curpos -1) / termwidth); /* integer arithmetic! (e.g. 171/80 = 2) */
cr();
for (count = 0; count < number_of_lines_in_prompt -1; count++) {
if (erase)
clear_line();
curs_up();
}
clear_line();
DPRINTF4(DEBUG_READLINE,"moved cursor up %d lines (erase = %d, len=%d, cooked=%d)", number_of_lines_in_prompt - 1, erase, promptlen_on_screen, cooked);
}
/*** Move cursor to the left ***/
void curs_left(Project p, BYTE word)
{
register LINE *prev;
if(p->nbc != 0)
{
inv_curs(p,FALSE);
if(word) p->nbc = backward_word(p->edited, p->nbc-1); else p->nbc--;
p->nbrwc = p->nbrc = x2pos(p->edited, p->nbc);
p->xcurs = (p->nbrc-p->left_pos) * XSIZE + gui.left;
/* Is it gone outside edit area? */
if(p->nbrc<p->left_pos)
scroll_xy(p, adjust_leftpos(p, -gui.xstep), p->top_line, FALSE);
if(p->ccp.select) move_selection(p, p->nbrc, p->nbl);
inv_curs(p,TRUE);
draw_info( p );
} else if( ( prev = p->edited->prev ) ) {
/* jump up */
p->nbrwc = x2pos(prev, prev->size);
curs_up(p);
}
}