/* * Copyright (c) 1981, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char sccsid[] = "@(#)newwin.c 8.3 (Berkeley) 7/27/94"; #endif /* not lint */ #include <stdlib.h> #include "curses.h" #undef nl /* Don't need it here, and it interferes. */ static WINDOW *__makenew __P((int, int, int, int, int)); void __set_subwin __P((WINDOW *, WINDOW *)); /* * newwin -- * Allocate space for and set up defaults for a new window. */ WINDOW * newwin(nl, nc, by, bx) register int nl, nc, by, bx; { register WINDOW *win; register __LINE *lp; register int i, j; register __LDATA *sp; if (nl == 0) nl = LINES - by; if (nc == 0) nc = COLS - bx; if ((win = __makenew(nl, nc, by, bx, 0)) == NULL) return (NULL); win->nextp = win; win->ch_off = 0; win->orig = NULL; #ifdef DEBUG __CTRACE("newwin: win->ch_off = %d\n", win->ch_off); #endif for (i = 0; i < nl; i++) { lp = win->lines[i]; lp->flags = 0; for (sp = lp->line, j = 0; j < nc; j++, sp++) { sp->ch = ' '; sp->attr = 0; } lp->hash = __hash((char *) lp->line, nc * __LDATASIZE); } return (win); } WINDOW * subwin(orig, nl, nc, by, bx) register WINDOW *orig; register int by, bx, nl, nc; { int i; __LINE *lp; register WINDOW *win; /* Make sure window fits inside the original one. */ #ifdef DEBUG __CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx); #endif if (by < orig->begy || bx < orig->begx || by + nl > orig->maxy + orig->begy || bx + nc > orig->maxx + orig->begx) return (NULL); if (nl == 0) nl = orig->maxy + orig->begy - by; if (nc == 0) nc = orig->maxx + orig->begx - bx; if ((win = __makenew(nl, nc, by, bx, 1)) == NULL) return (NULL); win->nextp = orig->nextp; orig->nextp = win; win->orig = orig; /* Initialize flags here so that refresh can also use __set_subwin. */ for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) lp->flags = 0; __set_subwin(orig, win); return (win); } /* * This code is shared with mvwin(). */ void __set_subwin(orig, win) register WINDOW *orig, *win; { int i; __LINE *lp, *olp; win->ch_off = win->begx - orig->begx; /* Point line pointers to line space. */ for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { win->lines[i] = lp; olp = orig->lines[i + win->begy - orig->begy]; lp->line = &olp->line[win->ch_off]; lp->firstchp = &olp->firstch; lp->lastchp = &olp->lastch; lp->hash = __hash((char *) lp->line, win->maxx * __LDATASIZE); } #ifdef DEBUG __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off); #endif } /* * __makenew -- * Set up a window buffer and returns a pointer to it. */ static WINDOW * __makenew(nl, nc, by, bx, sub) register int by, bx, nl, nc; int sub; { register WINDOW *win; register __LINE *lp; int i; #ifdef DEBUG __CTRACE("makenew: (%d, %d, %d, %d)\n", nl, nc, by, bx); #endif if ((win = malloc(sizeof(*win))) == NULL) return (NULL); #ifdef DEBUG __CTRACE("makenew: nl = %d\n", nl); #endif /* * Set up line pointer array and line space. */ if ((win->lines = malloc (nl * sizeof(__LINE *))) == NULL) { free(win); return NULL; } if ((win->lspace = malloc (nl * sizeof(__LINE))) == NULL) { free (win); free (win->lines); return NULL; } /* Don't allocate window and line space if it's a subwindow */ if (!sub) { /* * Allocate window space in one chunk. */ if ((win->wspace = malloc(nc * nl * sizeof(__LDATA))) == NULL) { free(win->lines); free(win->lspace); free(win); return NULL; } /* * Point line pointers to line space, and lines themselves into * window space. */ for (lp = win->lspace, i = 0; i < nl; i++, lp++) { win->lines[i] = lp; lp->line = &win->wspace[i * nc]; lp->firstchp = &lp->firstch; lp->lastchp = &lp->lastch; lp->firstch = 0; lp->lastch = 0; } } #ifdef DEBUG __CTRACE("makenew: nc = %d\n", nc); #endif win->cury = win->curx = 0; win->maxy = nl; win->maxx = nc; win->begy = by; win->begx = bx; win->flags = 0; __swflags(win); #ifdef DEBUG __CTRACE("makenew: win->flags = %0.2o\n", win->flags); __CTRACE("makenew: win->maxy = %d\n", win->maxy); __CTRACE("makenew: win->maxx = %d\n", win->maxx); __CTRACE("makenew: win->begy = %d\n", win->begy); __CTRACE("makenew: win->begx = %d\n", win->begx); #endif return (win); } void __swflags(win) register WINDOW *win; { win->flags &= ~(__ENDLINE | __FULLLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); if (win->begx + win->maxx == COLS) { win->flags |= __ENDLINE; if (win->begx == 0) { if (!__noqch) win->flags |= __FULLLINE; if (win->maxy == LINES && win->begy == 0) win->flags |= __FULLWIN; } if (win->begy + win->maxy == LINES) win->flags |= __SCROLLWIN; } }