1 /**************************************************************************** 2 * Copyright (c) 1998 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 36 /* 37 ** lib_mvwin.c 38 ** 39 ** The routine mvwin(). 40 ** 41 */ 42 43 #include <curses.priv.h> 44 45 MODULE_ID("$Id: lib_mvwin.c,v 1.7 1998/02/11 12:13:55 tom Exp $") 46 47 int mvwin(WINDOW *win, int by, int bx) 48 { 49 T((T_CALLED("mvwin(%p,%d,%d)"), win, by, bx)); 50 51 if (!win || (win->_flags & _ISPAD)) 52 returnCode(ERR); 53 54 /* Copying subwindows is allowed, but it is expensive... */ 55 if (win->_flags & _SUBWIN) { 56 int err = ERR; 57 WINDOW *parent = win->_parent; 58 if (parent) 59 { /* 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