lib/propoffsets.c

   1 /* Dia -- a diagram creation/manipulation program
   2  * Copyright (C) 1998 Alexander Larsson
   3  *
   4  * Property system for dia objects/shapes.
   5  * Copyright (C) 2000 James Henstridge
   6  * Copyright (C) 2001 Cyrille Chepelov
   7  * Major restructuration done in August 2001 by C. Chepelov
   8  *
   9  * Propoffsets.c: routines which deal with (almost) actually setting/putting
  10  * data in an object's members, and offset lists.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  */
  26
  27 #include <glib.h>
  28 #include "properties.h"
  29 #include "propinternals.h"
  30
  31 void
  32 do_set_props_from_offsets(void *base,
  33                           GPtrArray *props, const PropOffset *offsets)
  34 {
  35   /* Warning: the name quarks *must* all be valid */
  36   guint i;
  37
  38   for (i = 0; i < props->len; i++) {
  39     Property *prop = g_ptr_array_index(props,i);
  40     const PropOffset *ofs;
  41     for (ofs = offsets; ofs->name ; ofs++) {
  42       if ((prop->name_quark == ofs->name_quark) &&
  43           (prop->type_quark == ofs->type_quark)) {
  44         /* beware of props not set, see PROP_FLAG_OPTIONAL */
  45         if ((prop->experience & PXP_NOTSET) == 0)
  46           prop->ops->set_from_offset(prop,base,ofs->offset,ofs->offset2);
  47         break;
  48       }
  49     }
  50   }
  51 }
  52
  53 void
  54 do_get_props_from_offsets(void *base,
  55                           GPtrArray *props, const PropOffset *offsets)
  56 {
  57   /* Warning: the name quarks *must* all be valid */
  58   /* This is identical to do_set_props_from_offsets(). This sucks. */
  59   guint i;
  60
  61   for (i = 0; i < props->len; i++) {
  62     Property *prop = g_ptr_array_index(props,i);
  63     const PropOffset *ofs;
  64     for (ofs = offsets; ofs->name ; ofs++) {
  65       if ((prop->name_quark == ofs->name_quark) &&
  66           (prop->type_quark == ofs->type_quark)) {
  67         prop->ops->get_from_offset(prop,base,ofs->offset,ofs->offset2);
  68         break;
  69       }
  70     }
  71   }
  72 }
  73
  74 /* *************************************** */
  75
  76 void
  77 prop_offset_list_calculate_quarks(PropOffset *olist)
  78 {
  79   guint i;
  80
  81   for (i = 0; olist[i].name != NULL; i++) {
  82     if (olist[i].name_quark == 0)
  83       olist[i].name_quark = g_quark_from_static_string(olist[i].name);
  84     if (olist[i].type_quark == 0)
  85       olist[i].type_quark = g_quark_from_static_string(olist[i].type);
  86     if (!olist[i].ops)
  87       olist[i].ops = prop_type_get_ops(olist[i].type);
  88   }
  89 }
  90