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[helm.git] / helm / gtkmathview-bonobo / src / control-data.c
1 /* This file is part of GtkMathView-Bonobo, a Bonobo wrapper for GtkMathView.
2  * Copyright (C) 2003 Luca Padovani <lpadovan@cs.unibo.it>
3  *                    Pouria Masoudi <pmasoudi@cs.unibo.it>
4  * 
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  * 
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * Lesser General Public License for more details.
14  * 
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this library; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18  *
19  * For more information, please visit the project's home page
20  * http://helm.cs.unibo.it/gtkmathview-bonobo
21  * or send an email to <lpadovan@cs.unibo.it>
22  */
23
24 #include <config.h>
25
26 #include <gdome.h>
27
28 #include "control-data.h"
29
30 GtkMathViewControlData*
31 gtk_math_view_control_data_new(BonoboControl* control, GtkMathView *math_view)
32 {
33   GtkMathViewControlData *cd = g_new(GtkMathViewControlData,1);
34   cd->control = control; /* we don't ref the control this is a weak pointer */
35   cd->math_view = math_view;
36   gtk_widget_ref(GTK_WIDGET(math_view));
37   cd->item_factory = NULL;
38   cd->semantic_selection = FALSE;
39   cd->first_selected = NULL;
40   cd->root_selected = NULL;
41   cd->id_ns_uri = gdome_str_mkref("http://www.cs.unibo.it/helm");
42   cd->id_name = gdome_str_mkref("xref");
43   cd->x = cd->y = 0;
44   return cd;
45 }
46
47 void
48 gtk_math_view_control_data_destroy(GtkMathViewControlData* cd)
49 {
50   GdomeException exc = 0;
51   cd->control = NULL; /* don't unref the control, see above */
52   gtk_widget_unref(GTK_WIDGET(cd->math_view));
53   cd->math_view = NULL;
54   if (cd->item_factory != NULL)
55     {
56       gtk_object_unref(cd->item_factory);
57       cd->item_factory = NULL;
58     }
59   if (cd->first_selected != NULL)
60     {
61       gdome_el_unref(cd->first_selected, &exc);
62       g_assert(exc == 0);
63       cd->first_selected = NULL;
64     }
65   if (cd->root_selected != NULL)
66     {
67       gdome_el_unref(cd->root_selected, &exc);
68       g_assert(exc == 0);
69       cd->root_selected = NULL;
70     }
71   if (cd->id_ns_uri != NULL)
72     {
73       gdome_str_unref(cd->id_ns_uri);
74       cd->id_ns_uri = NULL;
75     }
76   if (cd->id_name != NULL)
77     {
78       gdome_str_unref(cd->id_name);
79       cd->id_name = NULL;
80     }
81   g_free(cd);
82 }
83
84 gchar*
85 gtk_math_view_control_data_get_id_ns_uri(GtkMathViewControlData* cd)
86 {
87   g_return_val_if_fail(cd != NULL, NULL);
88   return (cd->id_ns_uri != NULL) ? g_strdup(cd->id_ns_uri->str) : NULL;
89 }
90                                          
91 void
92 gtk_math_view_control_data_set_id_ns_uri(GtkMathViewControlData* cd, const gchar* ns_uri)
93 {
94   g_return_if_fail(cd != NULL);
95   if (cd->id_ns_uri != NULL) gdome_str_unref(cd->id_ns_uri);
96   cd->id_ns_uri = (ns_uri != NULL) ? gdome_str_mkref_dup(ns_uri) : NULL;
97 }
98
99 gchar*
100 gtk_math_view_control_data_get_id_name(GtkMathViewControlData* cd)
101 {
102   g_return_val_if_fail(cd != NULL, NULL);
103   return (cd->id_name != NULL) ? g_strdup(cd->id_name->str) : NULL;
104 }
105                                          
106 void
107 gtk_math_view_control_data_set_id_name(GtkMathViewControlData* cd, const gchar* name)
108 {
109   g_return_if_fail(cd != NULL);
110   if (cd->id_name != NULL) gdome_str_unref(cd->id_name);
111   cd->id_name = (name != NULL) ? gdome_str_mkref_dup(name) : NULL;
112 }
113
114 void
115 gtk_math_view_control_data_set_root_selected(GtkMathViewControlData* cd, GdomeElement* elem)
116 {
117   g_return_if_fail(cd != NULL);
118   GdomeException exc = 0;
119
120   gtk_math_view_freeze(cd->math_view);
121
122   if (cd->root_selected != NULL)
123     {
124       gtk_math_view_unselect(cd->math_view, cd->root_selected);
125       gdome_el_unref(cd->root_selected, &exc);
126       g_assert(exc == 0);
127     }
128
129   cd->root_selected = elem;
130   if (cd->root_selected != NULL)
131     {
132       gdome_el_ref(cd->root_selected, &exc);
133       g_assert(exc == 0);
134       gtk_math_view_select(cd->math_view, cd->root_selected);
135     }
136
137   gtk_math_view_thaw(cd->math_view);
138 }