362 lines
9.8 KiB
C
362 lines
9.8 KiB
C
/* $NetBSD: resize.c,v 1.20 2009/07/22 16:57:15 roy Exp $ */
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/*
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* Copyright (c) 2001
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* Brett Lymn.
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*
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* This code has been donated to The NetBSD Foundation by the Author.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)resize.c blymn 2001/08/26";
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#else
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__RCSID("$NetBSD: resize.c,v 1.20 2009/07/22 16:57:15 roy Exp $");
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#endif
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#endif /* not lint */
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#include <stdlib.h>
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#include "curses.h"
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#include "curses_private.h"
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static int __resizeterm(WINDOW *win, int nlines, int ncols);
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static int __resizewin(WINDOW *win, int nlines, int ncols);
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/*
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* wresize --
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* Resize the given window to the new size.
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*/
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int
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wresize(WINDOW *win, int req_nlines, int req_ncols)
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{
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int nlines = req_nlines;
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int ncols = req_ncols;
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if (win == NULL)
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return ERR;
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#ifdef DEBUG
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__CTRACE(__CTRACE_WINDOW, "wresize: (%p, %d, %d)\n",
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win, nlines, ncols);
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#endif
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if (win->orig == NULL) {
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/* bound "our" windows by the screen size */
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if (win == curscr || win == __virtscr || win == stdscr) {
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if (nlines > LINES)
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nlines = LINES;
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if (nlines < 1)
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nlines = 1;
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if (ncols > COLS)
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ncols = COLS;
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if (ncols < 1)
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ncols = 1;
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} else {
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if (win->begy > LINES)
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win->begy = 0;
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if (win->begy + nlines > LINES)
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nlines = 0;
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if (nlines <= 0)
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nlines += LINES - win->begy;
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if (nlines < 1)
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nlines = 1;
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if (win->begx > COLS)
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win->begx = 0;
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if (win->begx + ncols > COLS)
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ncols = 0;
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if (ncols <= 0)
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ncols += COLS - win->begx;
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if (ncols < 1)
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ncols = 1;
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}
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} else {
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/* subwins must fit inside the parent - check this */
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if (win->begy > win->orig->begy + win->orig->maxy)
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win->begy = win->orig->begy + win->orig->maxy - 1;
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if (win->begy + nlines > win->orig->begy + win->orig->maxy)
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nlines = 0;
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if (nlines <= 0)
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nlines += win->orig->begy + win->orig->maxy - win->begy;
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if (nlines < 1)
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nlines = 1;
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if (win->begx > win->orig->begx + win->orig->maxx)
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win->begx = win->orig->begx + win->orig->maxx - 1;
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if (win->begx + ncols > win->orig->begx + win->orig->maxx)
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ncols = 0;
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if (ncols <= 0)
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ncols += win->orig->begx + win->orig->maxx - win->begx;
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if (ncols < 1)
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ncols = 1;
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}
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if ((__resizewin(win, nlines, ncols)) == ERR)
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return ERR;
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win->reqy = req_nlines;
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win->reqx = req_ncols;
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/* If someone resizes curscr, we must also resize __virtscr */
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if (win == curscr) {
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if ((__resizewin(__virtscr, nlines, ncols)) == ERR)
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return ERR;
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__virtscr->reqy = req_nlines;
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__virtscr->reqx = req_ncols;
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}
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return OK;
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}
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/*
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* resizeterm --
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* Resize the terminal window, resizing the dependent windows.
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*/
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int
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resizeterm(int nlines, int ncols)
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{
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WINDOW *win;
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struct __winlist *list;
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#ifdef DEBUG
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__CTRACE(__CTRACE_WINDOW, "resizeterm: (%d, %d)\n", nlines, ncols);
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#endif
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if (__resizeterm(curscr, nlines, ncols) == ERR)
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return ERR;
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if (__resizeterm(__virtscr, nlines, ncols) == ERR)
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return ERR;
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if (__resizeterm(stdscr, nlines, ncols) == ERR)
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return ERR;
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LINES = nlines;
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COLS = ncols;
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/* tweak the flags now that we have updated the LINES and COLS */
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for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) {
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win = list->winp;
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if (!(win->flags & __ISPAD))
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__swflags(win);
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}
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wrefresh(curscr);
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return OK;
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}
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/*
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* __resizeterm
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* Setup window for resizing.
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*/
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static int
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__resizeterm(WINDOW *win, int nlines, int ncols)
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{
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int newlines, newcols;
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newlines = win->reqy;
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if (win->begy + newlines >= nlines)
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newlines = 0;
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if (newlines == 0)
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newlines = nlines - win->begy;
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newcols = win->reqx;
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if (win->begx + newcols >= ncols)
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newcols = 0;
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if (newcols == 0)
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newcols = ncols - win->begx;
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return __resizewin(win, newlines, newcols);
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}
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/*
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* __resizewin --
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* Resize the given window.
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*/
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static int
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__resizewin(WINDOW *win, int nlines, int ncols)
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{
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__LINE *lp, *olp, **newlines, *newlspace;
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__LDATA *sp;
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__LDATA *newwspace;
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int i, j;
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int y, x;
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WINDOW *swin;
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#ifdef DEBUG
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__CTRACE(__CTRACE_WINDOW, "resize: (%p, %d, %d)\n", win, nlines, ncols);
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__CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr);
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__CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags);
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__CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy);
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__CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx);
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__CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy);
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__CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx);
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__CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t);
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__CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b);
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#endif
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/*
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* free up any non-spacing storage before we lose the
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* pointers...
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*/
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#ifdef HAVE_WCHAR
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__cursesi_win_free_nsp(win);
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#endif
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if (nlines <= 0 || ncols <= 0)
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nlines = ncols = 0;
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else {
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/* Reallocate line pointer array and line space. */
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newlines = realloc(win->alines, nlines * sizeof(__LINE *));
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if (newlines == NULL)
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return ERR;
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win->alines = newlines;
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newlspace = realloc(win->lspace, nlines * sizeof(__LINE));
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if (newlspace == NULL)
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return ERR;
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win->lspace = newlspace;
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}
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/* Don't allocate window and line space if it's a subwindow */
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if (win->orig == NULL) {
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/*
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* Allocate window space in one chunk.
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*/
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if (ncols != 0) {
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newwspace = realloc(win->wspace,
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ncols * nlines * sizeof(__LDATA));
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if (newwspace == NULL)
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return ERR;
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win->wspace = newwspace;
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}
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/*
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* Point line pointers to line space, and lines themselves into
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* window space.
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*/
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for (lp = win->lspace, i = 0; i < nlines; i++, lp++) {
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win->alines[i] = lp;
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lp->line = &win->wspace[i * ncols];
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#ifdef DEBUG
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lp->sentinel = SENTINEL_VALUE;
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#endif
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lp->firstchp = &lp->firstch;
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lp->lastchp = &lp->lastch;
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lp->firstch = 0;
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lp->lastch = ncols - 1;
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lp->flags = __ISDIRTY;
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}
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} else {
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win->ch_off = win->begx - win->orig->begx;
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/* Point line pointers to line space. */
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for (lp = win->lspace, i = 0; i < nlines; i++, lp++) {
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win->alines[i] = lp;
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olp = win->orig->alines[i + win->begy - win->orig->begy];
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lp->line = &olp->line[win->ch_off];
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#ifdef DEBUG
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lp->sentinel = SENTINEL_VALUE;
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#endif
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lp->firstchp = &olp->firstch;
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lp->lastchp = &olp->lastch;
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lp->flags = __ISDIRTY;
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}
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}
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win->cury = win->curx = 0;
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win->maxy = nlines;
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win->maxx = ncols;
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win->scr_b = win->maxy - 1;
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__swflags(win);
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/*
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* we must zot the window contents otherwise lines may pick
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* up attributes from the previous line when the window is
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* made smaller. The client will redraw the window anyway
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* so this is no big deal.
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*/
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for (i = 0; i < win->maxy; i++) {
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lp = win->alines[i];
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for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) {
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sp->attr = 0;
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#ifndef HAVE_WCHAR
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sp->ch = win->bch;
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#else
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sp->ch = ( wchar_t )btowc(( int ) win->bch );
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sp->nsp = NULL;
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if (_cursesi_copy_nsp(win->bnsp, sp) == ERR)
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return ERR;
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SET_WCOL( *sp, 1 );
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#endif /* HAVE_WCHAR */
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}
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lp->hash = __hash((char *)(void *)lp->line,
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(size_t) (ncols * __LDATASIZE));
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}
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#ifdef DEBUG
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__CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr);
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__CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags);
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__CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy);
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__CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx);
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__CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy);
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__CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx);
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__CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t);
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__CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b);
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#endif
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if (win->orig == NULL) {
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/* bound subwindows to new size and fixup their pointers */
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for (swin = win->nextp; swin != win; swin = swin->nextp) {
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y = swin->reqy;
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if (swin->begy > win->begy + win->maxy)
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swin->begy = win->begy + win->maxy - 1;
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if (swin->begy + y > win->begy + win->maxy)
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y = 0;
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if (y <= 0)
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y += win->begy + win->maxy - swin->begy;
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if (y < 1)
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y = 1;
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x = swin->reqx;
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if (swin->begx > win->begx + win->maxx)
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swin->begx = win->begx + win->maxx - 1;
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if (swin->begx + x > win->begx + win->maxx)
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x = 0;
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if (x <= 0)
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x += win->begy + win->maxx - swin->begx;
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if (x < 1)
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x = 1;
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__resizewin(swin, y, x);
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}
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}
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return OK;
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}
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