src/canvas.h

   1 /* Copyright (c) 2008, 2009
   2  *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
   3  *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
   4  *      Micah Cowan (micah@cowan.name)
   5  *      Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
   6  * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
   7  *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
   8  *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
   9  * Copyright (c) 1987 Oliver Laumann
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 3, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program (see the file COPYING); if not, see
  23  * http://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
  24  * 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
  25  *
  26  ****************************************************************
  27  * $Id$ GNU
  28  */
  29
  30 #ifndef SCREEN_CANVAS_H
  31 #define SCREEN_CANVAS_H
  32
  33 #define SLICE_UNKN 0
  34 #define SLICE_VERT (1 << 0)
  35 #define SLICE_HORI (1 << 1)
  36
  37 #define SLICE_THIS (1 << 2)     /* used in equal test */
  38 #define SLICE_GLOBAL (1 << 3)
  39
  40 struct canvas
  41 {
  42   struct canvas   *c_next;      /* next canvas on display */
  43   struct display  *c_display;   /* back pointer to display */
  44
  45   struct canvas   *c_slnext;    /* next canvas in display slice */
  46   struct canvas   *c_slprev;    /* prev canvas in display slice */
  47   struct canvas   *c_slperp;    /* perpendicular slice */
  48   struct canvas   *c_slback;    /* perpendicular slice back pointer */
  49   int              c_slorient;  /* our slice orientation */
  50   int              c_slweight;  /* size ratio */
  51
  52   struct viewport *c_vplist;
  53   struct layer    *c_layer;     /* layer on this canvas */
  54   struct canvas   *c_lnext;     /* next canvas that displays layer */
  55   struct layer     c_blank;     /* bottom layer, always blank */
  56   int              c_xoff;      /* canvas x offset on display */
  57   int              c_yoff;      /* canvas y offset on display */
  58   int              c_xs;
  59   int              c_xe;
  60   int              c_ys;
  61   int              c_ye;
  62   struct event     c_captev;    /* caption changed event */
  63 };
  64
  65 struct win;                     /* forward declaration */
  66
  67 extern void  SetCanvasWindow __P((struct canvas *, struct win *));
  68 extern void  SetForeCanvas __P((struct display *, struct canvas *));
  69 extern struct canvas *FindCanvas __P((int, int));
  70 extern int   MakeDefaultCanvas __P((void));
  71 extern int   AddCanvas __P((int));
  72 extern void  RemCanvas __P((void));
  73 extern void  OneCanvas __P((void));
  74 extern void  FreeCanvas __P((struct canvas *));
  75 extern void  ResizeCanvas __P((struct canvas *));
  76 extern void  RecreateCanvasChain __P((void));
  77 extern void  RethinkViewportOffsets __P((struct canvas *));
  78 extern int   CountCanvasPerp __P((struct canvas *));
  79 extern void  EqualizeCanvas __P((struct canvas *, int));
  80 extern void  DupLayoutCv __P((struct canvas *, struct canvas *, int));
  81 extern void  PutWindowCv __P((struct canvas *));
  82
  83 #define CV_CALL(cv, cmd)                        \
  84 {                                               \
  85   struct display *olddisplay = display;         \
  86   struct layer *oldflayer = flayer;             \
  87   struct layer *l = cv->c_layer;                \
  88   struct canvas *cvlist = l->l_cvlist;          \
  89   struct canvas *cvlnext = cv->c_lnext;         \
  90   flayer = l;                                   \
  91   l->l_cvlist = cv;                             \
  92   cv->c_lnext = 0;                              \
  93   cmd;                                          \
  94   flayer = oldflayer;                           \
  95   l->l_cvlist = cvlist;                         \
  96   cv->c_lnext = cvlnext;                        \
  97   display = olddisplay;                         \
  98 }
  99
 100 #endif /* SCREEN_CANVAS_H */
 101