objects/custom/custom.c

   1 /* Dia -- an diagram creation/manipulation program
   2  * Copyright (C) 1998, 1999 Alexander Larsson
   3  *
   4  * Custom Objects -- objects defined in XML rather than C.
   5  * Copyright (C) 1999 James Henstridge.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21
  22 #include <config.h>
  23
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #ifdef HAVE_UNISTD_H
  27 #include <unistd.h>
  28 #endif
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <glib.h>
  32
  33 #include "sheet.h"
  34 #include "shape_info.h"
  35 #include "dia_dirs.h"
  36 #include "intl.h"
  37 #include "plug-ins.h"
  38
  39 void custom_object_new (ShapeInfo *info,
  40                         DiaObjectType **otype);
  41
  42 G_MODULE_EXPORT gboolean custom_object_load(gchar *filename,
  43                                             DiaObjectType **otype);
  44
  45 /* Cannot be static, because we may use this fn later when loading
  46    a new shape via the sheets dialog */
  47
  48 G_MODULE_EXPORT gboolean
  49 custom_object_load(gchar *filename, DiaObjectType **otype)
  50 {
  51   ShapeInfo *info;
  52
  53   if (!filename)
  54     return FALSE;
  55   info = shape_info_load(filename);
  56   /*g_assert(info);*/
  57   if (!info) {
  58     *otype = NULL;
  59     return FALSE;
  60   }
  61   custom_object_new(info, otype);
  62   return TRUE;
  63 }
  64
  65 static void load_shapes_from_tree(const gchar *directory)
  66 {
  67   GDir *dp;
  68   const char *dentry;
  69
  70   dp = g_dir_open(directory, 0, NULL);
  71   if (dp == NULL) {
  72     return;
  73   }
  74   while ( (dentry = g_dir_read_name(dp)) ) {
  75     gchar *filename = g_strconcat(directory, G_DIR_SEPARATOR_S,
  76                                   dentry, NULL);
  77     const gchar *p;
  78
  79     if (g_file_test(filename, G_FILE_TEST_IS_DIR)) {
  80       load_shapes_from_tree(filename);
  81       g_free(filename);
  82       continue;
  83     }
  84     /* if it's not a directory, then it must be a .shape file */
  85     if (   !g_file_test(filename, G_FILE_TEST_IS_REGULAR)
  86         || (strlen(dentry) < 6)) {
  87       g_free(filename);
  88       continue;
  89     }
  90
  91     p = dentry + strlen(dentry) - 6;
  92     if (0==strcmp(".shape",p)) {
  93       DiaObjectType *ot;
  94
  95       if (!custom_object_load(filename, &ot)) {
  96         g_warning("could not load shape file %s",filename);
  97       } else {
  98         g_assert(ot);
  99         g_assert(ot->default_user_data);
 100         object_register_type(ot);
 101       }
 102     }
 103     g_free(filename);
 104   }
 105   g_dir_close(dp);
 106 }
 107
 108
 109 DIA_PLUGIN_CHECK_INIT
 110
 111 PluginInitResult
 112 dia_plugin_init(PluginInfo *info)
 113 {
 114   char *shape_path;
 115   const char *home_dir;
 116
 117   if (!dia_plugin_info_init(info, _("Custom"), _("Custom XML shapes loader"),
 118                             NULL, NULL))
 119     return DIA_PLUGIN_INIT_ERROR;
 120
 121   home_dir = g_get_home_dir();
 122   if (home_dir) {
 123     home_dir = dia_config_filename("shapes");
 124     load_shapes_from_tree(home_dir);
 125     g_free((char *)home_dir);
 126   }
 127
 128   shape_path = getenv("DIA_SHAPE_PATH");
 129   if (shape_path) {
 130     char **dirs = g_strsplit(shape_path, G_SEARCHPATH_SEPARATOR_S, 0);
 131     int i;
 132
 133     for (i = 0; dirs[i] != NULL; i++)
 134       load_shapes_from_tree(dirs[i]);
 135     g_strfreev(dirs);
 136   } else {
 137     char *thedir = dia_get_data_directory("shapes");
 138     load_shapes_from_tree(thedir);
 139     g_free(thedir);
 140   }
 141
 142   return DIA_PLUGIN_INIT_OK;
 143 }