72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/* refresh.c */
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#include <curses.h>
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#include "curspriv.h"
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/* Wrefresh() updates window win's area of the physical screen. */
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void wrefresh(win)
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WINDOW *win;
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{
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if (win == curscr)
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curscr->_clear = TRUE;
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else
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wnoutrefresh(win);
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doupdate();
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}
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/****************************************************************/
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/* Wnoutrefresh() updates the image of the desired screen, */
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/* Without doing physical update (copies window win's image to */
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/* The _cursvar.tmpwin window, which is hidden from the user). */
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/****************************************************************/
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void wnoutrefresh(win)
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register WINDOW *win;
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{
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register int *dst; /* start destination in temp window */
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register int *end; /* end destination in temp window */
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register int *src; /* source in user window */
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register int first; /* first changed char on line */
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register int last; /* last changed char on line */
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WINDOW *nscr;
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int begy; /* window's place on screen */
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int begx;
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int i;
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int j;
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nscr = _cursvar.tmpwin;
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begy = win->_begy;
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begx = win->_begx;
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for (i = 0, j = begy; i <= win->_maxy; i++, j++) {
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if (win->_minchng[i] != _NO_CHANGE) {
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first = win->_minchng[i];
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last = win->_maxchng[i];
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dst = &(nscr->_line[j][begx + first]);
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end = &(nscr->_line[j][begx + last]);
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src = &(win->_line[i][first]);
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while (dst <= end) /* copy user line to temp window */
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*dst++ = *src++;
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first += begx; /* nscr's min/max change positions */
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last += begx;
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if ((nscr->_minchng[j] == _NO_CHANGE) || (nscr->_minchng[j] > first))
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nscr->_minchng[j] = first;
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if (last > nscr->_maxchng[j]) nscr->_maxchng[j] = last;
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win->_minchng[i] = _NO_CHANGE; /* updated now */
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} /* if */
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win->_maxchng[i] = _NO_CHANGE; /* updated now */
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} /* for */
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if (win->_clear) {
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win->_clear = FALSE;
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nscr->_clear = TRUE;
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} /* if */
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if (!win->_leave) {
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nscr->_cury = win->_cury + begy;
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nscr->_curx = win->_curx + begx;
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} /* if */
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} /* wnoutrefresh */
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