1 /**************************************************************************** 2 * Copyright 2020 Thomas E. Dickey * 3 * Copyright 1998-2009,2010 Free Software Foundation, Inc. * 4 * * 5 * Permission is hereby granted, free of charge, to any person obtaining a * 6 * copy of this software and associated documentation files (the * 7 * "Software"), to deal in the Software without restriction, including * 8 * without limitation the rights to use, copy, modify, merge, publish, * 9 * distribute, distribute with modifications, sublicense, and/or sell * 10 * copies of the Software, and to permit persons to whom the Software is * 11 * furnished to do so, subject to the following conditions: * 12 * * 13 * The above copyright notice and this permission notice shall be included * 14 * in all copies or substantial portions of the Software. * 15 * * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 23 * * 24 * Except as contained in this notice, the name(s) of the above copyright * 25 * holders shall not be used in advertising or otherwise to promote the * 26 * sale, use or other dealings in this Software without prior written * 27 * authorization. * 28 ****************************************************************************/ 29 30 /**************************************************************************** 31 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 32 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 33 * and: Thomas E. Dickey 1996-on * 34 * and: Juergen Pfeifer * 35 ****************************************************************************/ 36 37 /* 38 ** lib_mvwin.c 39 ** 40 ** The routine mvwin(). 41 ** 42 */ 43 44 #include <curses.priv.h> 45 46 MODULE_ID("$Id: lib_mvwin.c,v 1.19 2020/02/02 23:34:34 tom Exp $") 47 48 NCURSES_EXPORT(int) 49 mvwin(WINDOW *win, int by, int bx) 50 { 51 #if NCURSES_SP_FUNCS 52 SCREEN *sp = _nc_screen_of(win); 53 #endif 54 55 T((T_CALLED("mvwin(%p,%d,%d)"), (void *) win, by, bx)); 56 57 if (!win || (win->_flags & _ISPAD)) 58 returnCode(ERR); 59 60 /* 61 * mvwin() should only modify the indices. See test/demo_menus.c and 62 * test/movewindow.c for examples. 63 */ 64 #if 0 65 /* Copying subwindows is allowed, but it is expensive... */ 66 if (win->_flags & _SUBWIN) { 67 int err = ERR; 68 WINDOW *parent = win->_parent; 69 if (parent) { /* Now comes the complicated and costly part, you should really 70 * try to avoid to move subwindows. Because a subwindow shares 71 * the text buffers with its parent, one can't do a simple 72 * memmove of the text buffers. One has to create a copy, then 73 * to relocate the subwindow and then to do a copy. 74 */ 75 if ((by - parent->_begy == win->_pary) && 76 (bx - parent->_begx == win->_parx)) 77 err = OK; /* we don't actually move */ 78 else { 79 WINDOW *clone = dupwin(win); 80 if (clone) { 81 /* now we have the clone, so relocate win */ 82 83 werase(win); /* Erase the original place */ 84 /* fill with parents background */ 85 wbkgrnd(win, CHREF(parent->_nc_bkgd)); 86 wsyncup(win); /* Tell the parent(s) */ 87 88 err = mvderwin(win, 89 by - parent->_begy, 90 bx - parent->_begx); 91 if (err != ERR) { 92 err = copywin(clone, win, 93 0, 0, 0, 0, win->_maxy, win->_maxx, 0); 94 if (ERR != err) 95 wsyncup(win); 96 } 97 if (ERR == delwin(clone)) 98 err = ERR; 99 } 100 } 101 } 102 returnCode(err); 103 } 104 #endif 105 106 if (by + win->_maxy > screen_lines(SP_PARM) - 1 107 || bx + win->_maxx > screen_columns(SP_PARM) - 1 108 || by < 0 109 || bx < 0) 110 returnCode(ERR); 111 112 /* 113 * Whether or not the window is moved, touch the window's contents so 114 * that a following call to 'wrefresh()' will paint the window at the 115 * new location. This ensures that if the caller has refreshed another 116 * window at the same location, that this one will be displayed. 117 */ 118 win->_begy = (NCURSES_SIZE_T) by; 119 win->_begx = (NCURSES_SIZE_T) bx; 120 returnCode(touchwin(win)); 121 } 122