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