date and time created 83/09/17 17:11:03 by edward

[unix-history] / usr / src / usr.bin / window / cmd5.c

#ifndef lint
static  char *sccsid = "@(#)cmd5.c      3.7 83/09/15";
#endif

#include "defs.h"

/*
* Window movement.
*/

c_move(w)
register struct ww *w;
{
       int col, row;
       int mincol, minrow;
       int maxcol, maxrow;
       int curcol, currow;

       col = w->ww_w.l;
       row = w->ww_w.t;
       wwadd(boxwin, framewin->ww_back);
       for (;;) {
               wwbox(boxwin, row - 1, col - 1, w->ww_w.nr + 2, w->ww_w.nc + 2);
               getminmax(row, w->ww_w.nr, 1, wwnrow,
                       &currow, &minrow, &maxrow);
               getminmax(col, w->ww_w.nc, 0, wwncol,
                       &curcol, &mincol, &maxcol);
               wwsetcursor(currow, curcol);
               while (bpeekc() < 0)
                       bread();
               wwunbox(boxwin);
               switch (getpos(&row, &col, minrow, mincol, maxrow, maxcol)) {
               case -1:
                       wwdelete(boxwin);
                       if (!terse)
                               (void) wwputs("\r\nCancelled.  ", cmdwin);
                       return;
               case 1:
                       break;
               case 0:
                       continue;
               }
               break;
       }
       wwdelete(boxwin);
       if (!terse)
               (void) wwputs("\r\n", cmdwin);
       wwcurtowin(cmdwin);
       movewin(w, row, col);
}

movewin(w, row, col)
register struct ww *w;
{
       struct ww *back = w->ww_back;

       w->ww_altpos.r = w->ww_w.t;
       w->ww_altpos.c = w->ww_w.l;
       wwdelete(w);
       wwmove(w, row, col);
       wwadd(w, back);
       reframe();
}

/*
* Weird stufff, don't ask.
*/
getminmax(x, n, a, b, curx, minx, maxx)
register x, n, a, b;
int *curx, *minx, *maxx;
{
       if (x < 0)
               *curx = x + n - 1;
       else
               *curx = x;

       if (x <= a)
               *minx = 1 - n;
       else if (x <= b - n)
               *minx = a;
       else
               *minx = b - n;

       if (x >= b - n)
               *maxx = b - 1;
       else if (x >= a)
               *maxx = b - n;
       else
               *maxx = a;
}