/* $NetBSD: resize.c,v 1.11 2004/04/29 22:28:51 christos Exp $ */ /* * Copyright (c) 2001 * Brett Lymn. * * This code has been donated to The NetBSD Foundation by the Author. * * 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. */ #include #ifndef lint #if 0 static char sccsid[] = "@(#)resize.c blymn 2001/08/26"; #else __RCSID("$NetBSD: resize.c,v 1.11 2004/04/29 22:28:51 christos Exp $"); #endif #endif /* not lint */ #include #include "curses.h" #include "curses_private.h" static int __resizewin(WINDOW *win, int nlines, int ncols); /* * wresize -- * Resize the given window to the new size. */ int wresize(WINDOW *win, int req_nlines, int req_ncols) { int nlines = req_nlines; int ncols = req_ncols; if (win == NULL) return ERR; nlines = req_nlines; ncols = req_ncols; if (win->orig == NULL) { /* bound window to screen */ if (win->begy + nlines > LINES) nlines = 0; if (nlines <= 0) nlines += LINES - win->begy; if (win->begx + ncols > COLS) ncols = 0; if (ncols <= 0) ncols += COLS - win->begx; } else { /* subwins must fit inside the parent - check this */ if (win->begy + nlines > win->orig->begy + win->orig->maxy) nlines = 0; if (nlines <= 0) nlines += win->orig->begy + win->orig->maxy - win->begy; if (win->begx + ncols > win->orig->begx + win->orig->maxx) ncols = 0; if (ncols <= 0) ncols += win->orig->begx + win->orig->maxx - win->begx; } if ((__resizewin(win, nlines, ncols)) == ERR) return ERR; win->reqy = req_nlines; win->reqx = req_ncols; return OK; } /* * resizeterm -- * Resize the terminal window, resizing the dependent windows. */ int resizeterm(int nlines, int ncols) { WINDOW *win; struct __winlist *list; int newlines, newcols; /* don't worry if things have not changed... we would like to do this but some bastard programs update LINES and COLS before calling resizeterm thus negating it's effect. if ((nlines == LINES) && (ncols == COLS)) return OK;*/ #ifdef DEBUG __CTRACE("resizeterm: (%d, %d)\n", nlines, ncols); #endif for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { win = list->winp; newlines = win->reqy; if (win->begy + newlines >= nlines) newlines = 0; if (newlines == 0) newlines = nlines - win->begy; newcols = win->reqx; if (win->begx + newcols >= ncols) newcols = 0; if (newcols == 0) newcols = ncols - win->begx; if (__resizewin(win, newlines, newcols) != OK) return ERR; } LINES = nlines; COLS = ncols; /* tweak the flags now that we have updated the LINES and COLS */ for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) { win = list->winp; if (!(win->flags & __ISPAD)) __swflags(win); } wrefresh(curscr); return OK; } /* * __resizewin -- * Resize the given window. */ static int __resizewin(WINDOW *win, int nlines, int ncols) { __LINE *lp, *olp, **newlines, *newlspace; __LDATA *sp; __LDATA *newwspace; int i, j; int y, x; WINDOW *swin; #ifdef DEBUG __CTRACE("resize: (%p, %d, %d)\n", win, nlines, ncols); __CTRACE("resize: win->wattr = %08x\n", win->wattr); __CTRACE("resize: win->flags = %#.4x\n", win->flags); __CTRACE("resize: win->maxy = %d\n", win->maxy); __CTRACE("resize: win->maxx = %d\n", win->maxx); __CTRACE("resize: win->begy = %d\n", win->begy); __CTRACE("resize: win->begx = %d\n", win->begx); __CTRACE("resize: win->scr_t = %d\n", win->scr_t); __CTRACE("resize: win->scr_b = %d\n", win->scr_b); #endif if (nlines <= 0 || ncols <= 0) nlines = ncols = 0; else { /* Reallocate line pointer array and line space. */ newlines = realloc(win->lines, nlines * sizeof(__LINE *)); if (newlines == NULL) return ERR; win->lines = newlines; newlspace = realloc(win->lspace, nlines * sizeof(__LINE)); if (newlspace == NULL) return ERR; win->lspace = newlspace; } /* Don't allocate window and line space if it's a subwindow */ if (win->orig == NULL) { /* * Allocate window space in one chunk. */ if (ncols != 0) { newwspace = realloc(win->wspace, ncols * nlines * sizeof(__LDATA)); if (newwspace == NULL) return ERR; win->wspace = newwspace; } /* * Point line pointers to line space, and lines themselves into * window space. */ for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { win->lines[i] = lp; lp->line = &win->wspace[i * ncols]; #ifdef DEBUG lp->sentinel = SENTINEL_VALUE; #endif lp->firstchp = &lp->firstch; lp->lastchp = &lp->lastch; lp->firstch = 0; lp->lastch = ncols - 1; lp->flags = __ISDIRTY; } } else { win->ch_off = win->begx - win->orig->begx; /* Point line pointers to line space. */ for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { win->lines[i] = lp; olp = win->orig->lines[i + win->begy - win->orig->begy]; lp->line = &olp->line[win->ch_off]; #ifdef DEBUG lp->sentinel = SENTINEL_VALUE; #endif lp->firstchp = &olp->firstch; lp->lastchp = &olp->lastch; lp->flags = __ISDIRTY; } } win->cury = win->curx = 0; win->maxy = nlines; win->maxx = ncols; win->scr_b = win->maxy - 1; __swflags(win); /* * we must zot the window contents otherwise lines may pick * up attributes from the previous line when the window is * made smaller. The client will redraw the window anyway * so this is no big deal. */ for (i = 0; i < win->maxy; i++) { lp = win->lines[i]; for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) { sp->ch = ' '; sp->bch = ' '; sp->attr = 0; sp->battr = 0; } lp->hash = __hash((char *)(void *)lp->line, (size_t) (ncols * __LDATASIZE)); } #ifdef DEBUG __CTRACE("resize: win->wattr = %08x\n", win->wattr); __CTRACE("resize: win->flags = %#.4x\n", win->flags); __CTRACE("resize: win->maxy = %d\n", win->maxy); __CTRACE("resize: win->maxx = %d\n", win->maxx); __CTRACE("resize: win->begy = %d\n", win->begy); __CTRACE("resize: win->begx = %d\n", win->begx); __CTRACE("resize: win->scr_t = %d\n", win->scr_t); __CTRACE("resize: win->scr_b = %d\n", win->scr_b); #endif if (win->orig == NULL) { /* bound subwindows to new size and fixup their pointers */ for (swin = win->nextp; swin != win; swin = swin->nextp) { y = swin->reqy; if (swin->begy + y > win->begy + win->maxy) y = 0; if (y <= 0) y += win->begy + win->maxy - swin->begy; x = swin->reqx; if (swin->begx + x > win->begx + win->maxx) x = 0; if (x <= 0) x += win->begy + win->maxx - swin->begx; __resizewin(swin, y, x); } } return OK; }