ncurses 5.0

[ncurses.git] / ncurses / base / lib_mvwin.c

diff --git a/ncurses/base/lib_mvwin.c b/ncurses/base/lib_mvwin.c
new file mode 100644 (file)
index 0000000..9774d9f
--- /dev/null
+++ b/ncurses/base/lib_mvwin.c
@@ -0,0 +1,109 @@
+/****************************************************************************
+ * Copyright (c) 1998 Free Software Foundation, Inc.                        *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
+ *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ ****************************************************************************/
+
+
+
+/*
+**     lib_mvwin.c
+**
+**     The routine mvwin().
+**
+*/
+
+#include <curses.priv.h>
+
+MODULE_ID("$Id: lib_mvwin.c,v 1.7 1998/02/11 12:13:55 tom Exp $")
+
+int mvwin(WINDOW *win, int by, int bx)
+{
+       T((T_CALLED("mvwin(%p,%d,%d)"), win, by, bx));
+
+       if (!win || (win->_flags & _ISPAD))
+           returnCode(ERR);
+
+       /* Copying subwindows is allowed, but it is expensive... */
+       if (win->_flags & _SUBWIN) {
+         int err = ERR;
+         WINDOW *parent = win->_parent;
+         if (parent)
+           { /* Now comes the complicated and costly part, you should really
+              * try to avoid to move subwindows. Because a subwindow shares
+              * the text buffers with its parent, one can't do a simple
+              * memmove of the text buffers. One has to create a copy, then
+              * to relocate the subwindow and then to do a copy.
+              */
+             if ((by - parent->_begy == win->_pary) &&
+                 (bx - parent->_begx == win->_parx))
+               err=OK; /* we don't actually move */
+             else {
+               WINDOW* clone = dupwin(win);  
+               if (clone) {
+                 /* now we have the clone, so relocate win */
+                 
+                 werase(win);             /* Erase the original place     */
+                 wbkgd(win,parent->_bkgd);/* fill with parents background */
+                 wsyncup(win);            /* Tell the parent(s)           */
+                 
+                 err = mvderwin(win,                   
+                                by - parent->_begy,
+                                bx - parent->_begx);
+                 if (err!=ERR) {
+                   err = copywin(clone,win,
+                                 0, 0, 0, 0, win->_maxy, win->_maxx, 0);
+                   if (ERR!=err)
+                     wsyncup(win);
+                 }
+                 if (ERR==delwin(clone))
+                   err=ERR;
+               }
+             }
+           }
+         returnCode(err);
+       }
+
+       if (by + win->_maxy > screen_lines - 1
+       ||  bx + win->_maxx > screen_columns - 1
+       ||  by < 0
+       ||  bx < 0)
+           returnCode(ERR);
+
+       /*
+        * Whether or not the window is moved, touch the window's contents so
+        * that a following call to 'wrefresh()' will paint the window at the
+        * new location.  This ensures that if the caller has refreshed another
+        * window at the same location, that this one will be displayed.
+        */     
+       win->_begy = by;
+       win->_begx = bx;
+       returnCode(touchwin(win));
+}