Imported Upstream version 3.9.5upstream/3.9.5

1 files changed, 104 insertions, 0 deletions

diff --git a/layer.h b/layer.h
new file mode 100644
index 0000000..037fe24
--- /dev/null
+++ b/layer.h
@@ -0,0 +1,104 @@
+/* Copyright (c) 1993
+ *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
+ *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
+ * Copyright (c) 1987 Oliver Laumann
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program (see the file COPYING); if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
+ *
+ ****************************************************************
+ * $Id: overlay.h,v 1.3 1994/05/31 12:32:31 mlschroe Exp $ FAU
+ */
+
+/*
+ * This is the overlay structure. It is used to create a seperate
+ * layer over the current windows.
+ */
+
+struct mchar;	/* forward declaration */
+
+struct LayFuncs
+{
+  void	(*LayProcess) __P((char **, int *));
+  void	(*LayAbort) __P((void));
+  void	(*LayRedisplayLine) __P((int, int, int, int));
+  void	(*LayClearLine) __P((int, int, int));
+  int	(*LayRewrite) __P((int, int, int, struct mchar *, int));
+  int	(*LayResize) __P((int, int));
+  void	(*LayRestore) __P((void));
+};
+
+struct layer
+{
+  struct canvas *l_cvlist;	/* list of canvases displaying layer */
+  int	 l_width;
+  int	 l_height;
+  int    l_x;			/* cursor position */
+  int    l_y;
+  struct LayFuncs *l_layfn;
+  char	*l_data;
+
+  struct layer *l_next;		/* layer stack, should be in data? */
+  struct layer *l_bottom;	/* bottom element of layer stack */
+  int	 l_blocking;
+};
+
+#define Process		(*flayer->l_layfn->LayProcess)
+#define Abort		(*flayer->l_layfn->LayAbort)
+#define RedisplayLine	(*flayer->l_layfn->LayRedisplayLine)
+#define ClearLine	(*flayer->l_layfn->LayClearLine)
+#define Rewrite		(*flayer->l_layfn->LayRewrite)
+#define Resize		(*flayer->l_layfn->LayResize)
+#define Restore		(*flayer->l_layfn->LayRestore)
+
+#define SetCursor()	LGotoPos(flayer, flayer->l_x, flayer->l_y)
+#define CanResize(l)	(l->l_layfn->LayResize != DefResize)
+
+/* XXX: AArgh! think again! */
+
+#define LAY_CALL_UP(fn) do				\
+	{ 						\
+	  struct layer *oldlay = flayer; 		\
+	  struct canvas *oldcvlist, *cv;		\
+	  debug("LayCallUp\n");				\
+	  flayer = flayer->l_next;			\
+	  oldcvlist = flayer->l_cvlist;			\
+	  debug1("oldcvlist: %x\n", oldcvlist);		\
+	  flayer->l_cvlist = oldlay->l_cvlist;		\
+	  for (cv = flayer->l_cvlist; cv; cv = cv->c_lnext)	\
+		cv->c_layer = flayer;			\
+	  fn;						\
+	  flayer = oldlay;				\
+	  for (cv = flayer->l_cvlist; cv; cv = cv->c_lnext)	\
+		cv->c_layer = flayer;			\
+	  flayer->l_next->l_cvlist = oldcvlist;		\
+	} while(0)
+
+#define LAY_DISPLAYS(l, fn) do				\
+	{ 						\
+	  struct display *olddisplay = display;		\
+	  struct canvas *cv;				\
+	  for (display = displays; display; display = display->d_next) \
+	    {						\
+	      for (cv = D_cvlist; cv; cv = cv->c_next)	\
+		if (cv->c_layer == l)			\
+		  break;				\
+	      if (cv == 0)				\
+		continue;				\
+	      fn;					\
+	    }						\
+	  display = olddisplay;				\
+	} while(0)
+