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freebsd/lib/libncurses/lib_pad.c
1994-12-02 06:40:24 +00:00

144 lines
3.0 KiB
C

/* This work is copyrighted. See COPYRIGHT.OLD & COPYRIGHT.NEW for *
* details. If they are missing then this copy is in violation of *
* the copyright conditions. */
/*
* lib_pad.c
* newpad -- create a new pad
* pnoutrefresh -- refresh a pad, no update
* pechochar -- add a char to a pad and refresh
*/
#include <stdlib.h>
#include "curses.priv.h"
WINDOW *newpad(int l, int c)
{
WINDOW *win;
chtype *ptr;
int i, j;
T(("newpad(%d, %d) called", l, c));
if (l <= 0 || c <= 0)
return NULL;
if ((win = makenew(l,c,0,0)) == NULL)
return NULL;
win->_flags |= _ISPAD;
for (i = 0; i < l; i++) {
if ((win->_line[i] = (chtype *) calloc(c, sizeof(chtype))) == NULL) {
for (j = 0; j < i; j++)
free(win->_line[j]);
free(win->_firstchar);
free(win->_lastchar);
free(win->_line);
free(win);
return NULL;
}
else
for (ptr = win->_line[i]; ptr < win->_line[i] + c; )
*ptr++ = ' ';
}
T(("newpad: returned window is %x", win));
return(win);
}
int prefresh(WINDOW *win, int pminrow, int pmincol,
int sminrow, int smincol, int smaxrow, int smaxcol)
{
T(("prefresh() called"));
if (pnoutrefresh(win, pminrow, pmincol, sminrow, smincol, smaxrow, smaxcol) != ERR)
return (doupdate());
else
return ERR;
}
int pnoutrefresh(WINDOW *win, int pminrow, int pmincol,
int sminrow, int smincol, int smaxrow, int smaxcol)
{
int i, j;
int m, n;
T(("pnoutrefresh(%x, %d, %d, %d, %d, %d, %d) called",
win, pminrow, pmincol, sminrow, smincol, smaxrow, smaxcol));
if (!(win->_flags & _ISPAD))
return ERR;
T(("one"));
if (pminrow < 0) pminrow = 0;
if (pmincol < 0) pmincol = 0;
if (sminrow < 0) sminrow = 0;
if (smincol < 0) smincol = 0;
T(("two"));
if (smaxrow >= LINES || smaxcol >= COLS)
return ERR;
T(("three"));
if ((pminrow + smaxrow - sminrow > win->_maxy) ||
(pmincol + smaxcol - smincol > win->_maxx))
return ERR;
T(("pad being refreshed"));
for (i = pminrow, m = sminrow; i <= pminrow + smaxrow-sminrow;
i++, m++) {
for (j = pmincol, n = smincol; j <= pmincol + smaxcol-smincol;
j++, n++) {
if (win->_line[i][j] != newscr->_line[m][n]) {
newscr->_line[m][n] = win->_line[i][j];
if (newscr->_firstchar[m] == _NOCHANGE)
newscr->_firstchar[m] = newscr->_lastchar[m] = n;
else if (n < newscr->_firstchar[m])
newscr->_firstchar[m] = n;
else if (n > newscr->_lastchar[m])
newscr->_lastchar[m] = n;
}
}
}
win->_firstchar[i] = win->_lastchar[i] = _NOCHANGE;
win->_begx = smincol;
win->_begy = sminrow;
if (win->_clear) {
win->_clear = FALSE;
newscr->_clear = TRUE;
}
if (! win->_leave) {
newscr->_cury = win->_cury + win->_begy;
newscr->_curx = win->_curx + win->_begx;
}
return OK;
}
int pechochar(WINDOW *pad, chtype ch)
{
int x, y;
T(("echochar(%x, %x)", pad, ch));
if (pad->_flags & _ISPAD)
return ERR;
x = pad->_begx + pad->_curx;
y = pad->_begy + pad->_cury;
waddch(curscr, ch);
doupdate();
return OK;
}