1 /* $OpenBSD: lib_mvwin.c,v 1.2 2001/01/22 18:01:41 millert Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998,2000 Free Software Foundation, Inc. * 5 * * 6 * Permission is hereby granted, free of charge, to any person obtaining a * 7 * copy of this software and associated documentation files (the * 8 * "Software"), to deal in the Software without restriction, including * 9 * without limitation the rights to use, copy, modify, merge, publish, * 10 * distribute, distribute with modifications, sublicense, and/or sell * 11 * copies of the Software, and to permit persons to whom the Software is * 12 * furnished to do so, subject to the following conditions: * 13 * * 14 * The above copyright notice and this permission notice shall be included * 15 * in all copies or substantial portions of the Software. * 16 * * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 24 * * 25 * Except as contained in this notice, the name(s) of the above copyright * 26 * holders shall not be used in advertising or otherwise to promote the * 27 * sale, use or other dealings in this Software without prior written * 28 * authorization. * 29 ****************************************************************************/ 30 31 /**************************************************************************** 32 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 33 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 34 ****************************************************************************/ 35 36 /* 37 ** lib_mvwin.c 38 ** 39 ** The routine mvwin(). 40 ** 41 */ 42 43 #include <curses.priv.h> 44 45 MODULE_ID("$From: lib_mvwin.c,v 1.9 2000/12/10 02:43:27 tom Exp $") 46 47 NCURSES_EXPORT(int) 48 mvwin(WINDOW *win, int by, int bx) 49 { 50 T((T_CALLED("mvwin(%p,%d,%d)"), win, by, bx)); 51 52 if (!win || (win->_flags & _ISPAD)) 53 returnCode(ERR); 54 55 /* Copying subwindows is allowed, but it is expensive... */ 56 if (win->_flags & _SUBWIN) { 57 int err = ERR; 58 WINDOW *parent = win->_parent; 59 if (parent) { /* Now comes the complicated and costly part, you should really 60 * try to avoid to move subwindows. Because a subwindow shares 61 * the text buffers with its parent, one can't do a simple 62 * memmove of the text buffers. One has to create a copy, then 63 * to relocate the subwindow and then to do a copy. 64 */ 65 if ((by - parent->_begy == win->_pary) && 66 (bx - parent->_begx == win->_parx)) 67 err = OK; /* we don't actually move */ 68 else { 69 WINDOW *clone = dupwin(win); 70 if (clone) { 71 /* now we have the clone, so relocate win */ 72 73 werase(win); /* Erase the original place */ 74 wbkgd(win, parent->_bkgd); /* fill with parents background */ 75 wsyncup(win); /* Tell the parent(s) */ 76 77 err = mvderwin(win, 78 by - parent->_begy, 79 bx - parent->_begx); 80 if (err != ERR) { 81 err = copywin(clone, win, 82 0, 0, 0, 0, win->_maxy, win->_maxx, 0); 83 if (ERR != err) 84 wsyncup(win); 85 } 86 if (ERR == delwin(clone)) 87 err = ERR; 88 } 89 } 90 } 91 returnCode(err); 92 } 93 94 if (by + win->_maxy > screen_lines - 1 95 || bx + win->_maxx > screen_columns - 1 96 || by < 0 97 || bx < 0) 98 returnCode(ERR); 99 100 /* 101 * Whether or not the window is moved, touch the window's contents so 102 * that a following call to 'wrefresh()' will paint the window at the 103 * new location. This ensures that if the caller has refreshed another 104 * window at the same location, that this one will be displayed. 105 */ 106 win->_begy = by; 107 win->_begx = bx; 108 returnCode(touchwin(win)); 109 } 110