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+/* Copyright (c) 2008, 2009
+ * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
+ * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
+ * Micah Cowan (micah@cowan.name)
+ * Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
+ * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
+ * 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 3, 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, see
+ * https://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
+ *
+ ****************************************************************
+ * $Id$ GNU
+ */
+
+#ifndef SCREEN_CANVAS_H
+#define SCREEN_CANVAS_H
+
+#define SLICE_UNKN 0
+#define SLICE_VERT (1 << 0)
+#define SLICE_HORI (1 << 1)
+
+#define SLICE_THIS (1 << 2) /* used in equal test */
+#define SLICE_GLOBAL (1 << 3)
+
+struct canvas
+{
+ struct canvas *c_next; /* next canvas on display */
+ struct display *c_display; /* back pointer to display */
+
+ struct canvas *c_slnext; /* next canvas in display slice */
+ struct canvas *c_slprev; /* prev canvas in display slice */
+ struct canvas *c_slperp; /* perpendicular slice */
+ struct canvas *c_slback; /* perpendicular slice back pointer */
+ int c_slorient; /* our slice orientation */
+ int c_slweight; /* size ratio */
+
+ struct viewport *c_vplist;
+ struct layer *c_layer; /* layer on this canvas */
+ struct canvas *c_lnext; /* next canvas that displays layer */
+ struct layer c_blank; /* bottom layer, always blank */
+ int c_xoff; /* canvas x offset on display */
+ int c_yoff; /* canvas y offset on display */
+ int c_xs;
+ int c_xe;
+ int c_ys;
+ int c_ye;
+ struct event c_captev; /* caption changed event */
+};
+
+struct win; /* forward declaration */
+
+extern void SetCanvasWindow __P((struct canvas *, struct win *));
+extern void SetForeCanvas __P((struct display *, struct canvas *));
+extern struct canvas *FindCanvas __P((int, int));
+extern int MakeDefaultCanvas __P((void));
+extern int AddCanvas __P((int));
+extern void RemCanvas __P((void));
+extern void OneCanvas __P((void));
+extern void FreeCanvas __P((struct canvas *));
+extern void ResizeCanvas __P((struct canvas *));
+extern void RecreateCanvasChain __P((void));
+extern void RethinkViewportOffsets __P((struct canvas *));
+extern int CountCanvasPerp __P((struct canvas *));
+extern void EqualizeCanvas __P((struct canvas *, int));
+extern void DupLayoutCv __P((struct canvas *, struct canvas *, int));
+extern void PutWindowCv __P((struct canvas *));
+
+#define CV_CALL(cv, cmd) \
+{ \
+ struct display *olddisplay = display; \
+ struct layer *oldflayer = flayer; \
+ struct layer *l = cv->c_layer; \
+ struct canvas *cvlist = l->l_cvlist; \
+ struct canvas *cvlnext = cv->c_lnext; \
+ flayer = l; \
+ l->l_cvlist = cv; \
+ cv->c_lnext = 0; \
+ cmd; \
+ flayer = oldflayer; \
+ l->l_cvlist = cvlist; \
+ cv->c_lnext = cvlnext; \
+ display = olddisplay; \
+}
+
+#endif /* SCREEN_CANVAS_H */
+