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1 | /* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */ |
2 | /* | |
3 | * viking | |
4 | * Copyright (C) Guilhem Bonnefille 2009 <guilhem.bonnefille@gmail.com> | |
5 | * | |
6 | * viking is free software: you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * viking is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
14 | * See the GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #ifdef HAVE_CONFIG_H | |
21 | #include "config.h" | |
22 | #endif | |
23 | ||
24 | #include <stdio.h> | |
25 | #ifdef HAVE_STRING_H | |
26 | #include <string.h> | |
27 | #endif | |
28 | ||
29 | #include <glib.h> | |
30 | #include <glib/gstdio.h> | |
31 | ||
d156fff5 | 32 | #include <gtk/gtk.h> |
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33 | |
34 | #include "vikgobjectbuilder.h" | |
35 | ||
36 | /* FIXME use private fields */ | |
37 | static gchar *class_name = NULL; | |
38 | GType gtype = 0; | |
39 | gchar *property_name = NULL; | |
40 | GParameter *parameters = NULL; | |
41 | gint nb_parameters = 0; | |
42 | ||
43 | /* signals */ | |
44 | enum | |
45 | { | |
46 | NEW_OBJECT, | |
47 | ||
48 | LAST_SIGNAL | |
49 | }; | |
50 | ||
51 | ||
52 | static guint gobject_builder_signals[LAST_SIGNAL] = { 0 }; | |
53 | ||
54 | G_DEFINE_TYPE (VikGobjectBuilder, vik_gobject_builder, G_TYPE_OBJECT); | |
55 | ||
56 | static void | |
57 | vik_gobject_builder_init (VikGobjectBuilder *object) | |
58 | { | |
59 | /* TODO: Add initialization code here */ | |
60 | } | |
61 | ||
62 | static void | |
63 | vik_gobject_builder_finalize (GObject *object) | |
64 | { | |
65 | /* TODO: Add deinitalization code here */ | |
66 | ||
67 | G_OBJECT_CLASS (vik_gobject_builder_parent_class)->finalize (object); | |
68 | } | |
69 | ||
70 | static void | |
71 | vik_gobject_builder_new_object (VikGobjectBuilder *self, GObject *object) | |
72 | { | |
73 | /* TODO: Add default signal handler implementation here */ | |
74 | } | |
75 | ||
76 | static void | |
77 | vik_gobject_builder_class_init (VikGobjectBuilderClass *klass) | |
78 | { | |
79 | GObjectClass* object_class = G_OBJECT_CLASS (klass); | |
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80 | |
81 | object_class->finalize = vik_gobject_builder_finalize; | |
82 | ||
83 | klass->new_object = vik_gobject_builder_new_object; | |
84 | ||
85 | gobject_builder_signals[NEW_OBJECT] = | |
86 | g_signal_new ("new-object", | |
87 | G_OBJECT_CLASS_TYPE (klass), | |
88 | 0, | |
89 | G_STRUCT_OFFSET (VikGobjectBuilderClass, new_object), | |
90 | NULL, NULL, | |
91 | g_cclosure_marshal_VOID__OBJECT, | |
92 | G_TYPE_NONE, 1, | |
93 | G_TYPE_OBJECT); | |
94 | } | |
95 | ||
96 | /* Called for open tags <foo bar="baz"> */ | |
97 | static void | |
98 | _start_element (GMarkupParseContext *context, | |
99 | const gchar *element_name, | |
100 | const gchar **attribute_names, | |
101 | const gchar **attribute_values, | |
102 | gpointer user_data, | |
103 | GError **error) | |
104 | { | |
105 | if (strcmp(element_name, "object") == 0) | |
106 | { | |
107 | class_name = g_strdup(attribute_values[0]); | |
108 | gtype = g_type_from_name (class_name); | |
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109 | if (gtype == 0) |
110 | { | |
111 | g_warning("Unknown GObject type '%s'", class_name); | |
112 | return; | |
113 | } | |
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114 | } |
115 | if (strcmp(element_name, "property") == 0 && gtype != 0) | |
116 | { | |
117 | int i=0; | |
118 | while (attribute_names[i] != NULL) | |
119 | { | |
120 | if (strcmp (attribute_names[i], "name") == 0) | |
121 | { | |
122 | g_free (property_name); | |
123 | property_name = g_strdup (attribute_values[i]); | |
124 | } | |
125 | i++; | |
126 | } | |
127 | } | |
128 | } | |
129 | ||
130 | /* Called for close tags </foo> */ | |
131 | static void | |
132 | _end_element (GMarkupParseContext *context, | |
133 | const gchar *element_name, | |
134 | gpointer user_data, | |
135 | GError **error) | |
136 | { | |
137 | VikGobjectBuilder *self = VIK_GOBJECT_BUILDER (user_data); | |
138 | gpointer object = NULL; | |
139 | if (strcmp(element_name, "object") == 0 && gtype != 0) | |
140 | { | |
141 | object = g_object_newv(gtype, nb_parameters, parameters); | |
142 | if (object != NULL) | |
143 | { | |
144 | g_debug("VikGobjectBuilder: new GObject of type %s", g_type_name(gtype)); | |
145 | g_signal_emit ( G_OBJECT(self), gobject_builder_signals[NEW_OBJECT], 0, object ); | |
146 | g_object_unref (object); | |
147 | } | |
148 | /* Free memory */ | |
149 | int i = 0; | |
150 | for (i = 0 ; i < nb_parameters ; i++) | |
151 | { | |
f83f478a | 152 | g_free ((gchar *)parameters[i].name); |
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153 | g_value_unset (&(parameters[i].value)); |
154 | } | |
155 | g_free (parameters); | |
156 | parameters = NULL; | |
157 | nb_parameters = 0; | |
158 | gtype = 0; | |
159 | } | |
160 | if (strcmp(element_name, "property") == 0) | |
161 | { | |
162 | g_free (property_name); | |
163 | property_name = NULL; | |
164 | } | |
165 | } | |
166 | ||
167 | /* Called for character data */ | |
168 | /* text is not nul-terminated */ | |
169 | static void | |
170 | _text (GMarkupParseContext *context, | |
171 | const gchar *text, | |
172 | gsize text_len, | |
173 | gpointer user_data, | |
174 | GError **error) | |
175 | { | |
176 | if (strcmp (g_markup_parse_context_get_element (context), "property") == 0) | |
177 | { | |
178 | GValue gvalue = {0}; | |
179 | gboolean found = FALSE; | |
180 | if (gtype != 0 && property_name != NULL) | |
181 | { | |
182 | /* parameter value */ | |
183 | /* We have to retrieve the expected type of the value | |
184 | * in order to do the correct transformation */ | |
185 | GObjectClass *oclass; | |
186 | oclass = g_type_class_ref (gtype); | |
187 | g_assert (oclass != NULL); | |
188 | GParamSpec *pspec; | |
189 | pspec = g_object_class_find_property (G_OBJECT_CLASS (oclass), property_name); | |
190 | if (!pspec) | |
191 | { | |
192 | g_warning ("Unknown property: %s.%s", g_type_name (gtype), property_name); | |
193 | return; | |
194 | } | |
195 | gchar *value = g_strndup (text, text_len); | |
196 | found = gtk_builder_value_from_string_type(NULL, pspec->value_type, value, &gvalue, NULL); | |
197 | g_free (value); | |
198 | } | |
199 | if (G_IS_VALUE (&gvalue) && found == TRUE) | |
200 | { | |
201 | /* store new parameter */ | |
202 | g_debug("VikGobjectBuilder: store new GParameter for %s: (%s)%s=%*s", | |
f83f478a | 203 | g_type_name(gtype), g_type_name(G_VALUE_TYPE(&gvalue)), property_name, (gint)text_len, text); |
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204 | nb_parameters++; |
205 | parameters = g_realloc(parameters, sizeof(GParameter)*nb_parameters); | |
206 | /* parameter name */ | |
207 | parameters[nb_parameters-1].name = g_strdup(property_name); | |
208 | /* parameter value */ | |
209 | parameters[nb_parameters-1].value = gvalue; | |
210 | } | |
211 | } | |
212 | } | |
213 | ||
214 | VikGobjectBuilder * | |
215 | vik_gobject_builder_new (void) | |
216 | { | |
217 | return g_object_new (VIK_TYPE_GOBJECT_BUILDER, NULL); | |
218 | } | |
219 | ||
220 | void | |
221 | vik_gobject_builder_parse (VikGobjectBuilder *self, const gchar *filename) | |
222 | { | |
223 | GMarkupParser xml_parser; | |
224 | GMarkupParseContext *xml_context; | |
225 | GError *error; | |
226 | ||
227 | FILE *file = g_fopen (filename, "r"); | |
228 | if (file == NULL) | |
229 | /* TODO emit warning */ | |
230 | return; | |
231 | ||
232 | /* setup context parse (ie callbacks) */ | |
233 | xml_parser.start_element = &_start_element; | |
234 | xml_parser.end_element = &_end_element; | |
235 | xml_parser.text = &_text; | |
236 | xml_parser.passthrough = NULL; | |
237 | xml_parser.error = NULL; | |
238 | ||
239 | xml_context = g_markup_parse_context_new(&xml_parser, 0, self, NULL); | |
240 | ||
241 | gchar buff[BUFSIZ]; | |
242 | size_t nb; | |
243 | while ((nb = fread (buff, sizeof(gchar), BUFSIZ, file)) > 0) | |
244 | { | |
245 | if (!g_markup_parse_context_parse(xml_context, buff, nb, &error)) | |
246 | printf("read_xml() : parsing error.\n"); | |
247 | } | |
248 | /* cleanup */ | |
249 | if (!g_markup_parse_context_end_parse(xml_context, &error)) | |
250 | printf("read_xml() : errors occurred reading file.\n"); | |
251 | ||
252 | g_markup_parse_context_free(xml_context); | |
253 | fclose (file); | |
254 | } |