1 /* Fo
2 * fo-property-text-align.c: 'text-align' property
3 *
4 * Copyright (C) 2001-2005 Sun Microsystems
5 * Copyright (C) 2007 Menteith Consulting Ltd
6 *
7 * See COPYING for the status of this software.
8 */
9
10 #include <string.h>
11 #include "fo-utils.h"
12 #include "fo-context.h"
13 #include "datatype/fo-datatype.h"
14 #include "property/fo-property-private.h"
15 #include "property/fo-property-font-size.h"
16 #include "property/fo-property-text-align.h"
17
18 /* text-align */
19 /* Inherited: TRUE */
20 /* Shorthand: FALSE */
21 /* start | center | end | justify | inside | outside | left | right | <string> | inherit */
22 /* Initial value: start */
23
24 struct _FoPropertyTextAlign
25 {
26 FoProperty parent_instance;
27 };
28
29 struct _FoPropertyTextAlignClass
30 {
31 FoPropertyClass parent_class;
32 };
33
34 static void fo_property_text_align_init (FoPropertyTextAlign *property_text_align);
35 static void fo_property_text_align_class_init (FoPropertyTextAlignClass *klass);
36 static void fo_property_text_align_finalize (GObject *object);
37
38 static FoDatatype * fo_property_text_align_resolve_enum (const gchar *token,
39 FoContext *context,
40 GError **error);
41 static FoDatatype * fo_property_text_align_validate (FoDatatype *datatype,
42 FoContext *context,
43 GError **error);
44
45 static const gchar class_name[] = "text-align";
46 static gpointer parent_class;
47
48 /**
49 * fo_property_text_align_get_type:
50 *
51 * Register the #FoPropertyTextAlign type if not already registered and
52 * return its #GType value.
53 *
54 * Return value: #GType of #FoPropertyTextAlign.
55 **/
56 GType
fo_property_text_align_get_type(void)57 fo_property_text_align_get_type (void)
58 {
59 static GType object_type = 0;
60
61 if (!object_type)
62 {
63 static const GTypeInfo object_info =
64 {
65 sizeof (FoPropertyTextAlignClass),
66 NULL, /* base_init */
67 NULL, /* base_finalize */
68 (GClassInitFunc) fo_property_text_align_class_init,
69 NULL, /* class_finalize */
70 NULL, /* class_data */
71 sizeof (FoPropertyTextAlign),
72 0, /* n_preallocs */
73 (GInstanceInitFunc) fo_property_text_align_init,
74 NULL /* value_table */
75 };
76
77 object_type = g_type_register_static (FO_TYPE_PROPERTY,
78 class_name,
79 &object_info, 0);
80 }
81
82 return object_type;
83 }
84
85 /**
86 * fo_property_text_align_init:
87 * @text_align: #FoPropertyTextAlign object to initialise.
88 *
89 * Implements #GInstanceInitFunc for #FoPropertyTextAlign.
90 **/
91 void
fo_property_text_align_init(FoPropertyTextAlign * text_align)92 fo_property_text_align_init (FoPropertyTextAlign *text_align)
93 {
94 FO_PROPERTY (text_align)->value =
95 g_object_ref (fo_enum_factory_get_enum_by_nick ("start"));
96 }
97
98 /**
99 * fo_property_text_align_class_init:
100 * @klass: #FoPropertyTextAlignClass object to initialise.
101 *
102 * Implements #GClassInitFunc for #FoPropertyTextAlignClass.
103 **/
104 void
fo_property_text_align_class_init(FoPropertyTextAlignClass * klass)105 fo_property_text_align_class_init (FoPropertyTextAlignClass *klass)
106 {
107 GObjectClass *object_class = G_OBJECT_CLASS (klass);
108 FoPropertyClass *property_class = FO_PROPERTY_CLASS (klass);
109
110 parent_class = g_type_class_peek_parent (klass);
111
112 object_class->finalize = fo_property_text_align_finalize;
113
114 property_class->is_inherited = TRUE;
115 property_class->is_shorthand = FALSE;
116 property_class->resolve_enum =
117 fo_property_text_align_resolve_enum;
118 property_class->validate =
119 fo_property_text_align_validate;
120 property_class->get_initial =
121 fo_property_text_align_get_initial;
122 }
123
124 /**
125 * fo_property_text_align_finalize:
126 * @object: #FoPropertyTextAlign object to finalize.
127 *
128 * Implements #GObjectFinalizeFunc for #FoPropertyTextAlign.
129 **/
130 void
fo_property_text_align_finalize(GObject * object)131 fo_property_text_align_finalize (GObject *object)
132 {
133 FoPropertyTextAlign *text_align;
134
135 text_align = FO_PROPERTY_TEXT_ALIGN (object);
136
137 G_OBJECT_CLASS (parent_class)->finalize (object);
138 }
139
140
141 /**
142 * fo_property_text_align_new:
143 *
144 * Creates a new #FoPropertyTextAlign initialized to default value.
145 *
146 * Return value: the new #FoPropertyTextAlign.
147 **/
148 FoProperty*
fo_property_text_align_new(void)149 fo_property_text_align_new (void)
150 {
151 FoProperty* text_align;
152
153 text_align =
154 FO_PROPERTY (g_object_new (fo_property_text_align_get_type (),
155 NULL));
156
157 return text_align;
158 }
159
160 /**
161 * fo_property_text_align_resolve_enum:
162 * @token: Token from the XML attribute value to be evaluated as an
163 * enumeration token.
164 * @context: #FoContext object from which to possibly inherit values.
165 * @error: Information about any error that has occurred.
166 *
167 * Compare @token against the enumeration tokens that are valid for the
168 * current FO property. If @token is valid, returns either an #FoEnum datatype
169 * representing the enumeration token or a different datatype representing
170 * the enumeration token's resolved value. If @token is not valid,
171 * sets @error and returns NULL.
172 *
173 * Return value: Resolved enumeration value or NULL.
174 **/
175 FoDatatype*
fo_property_text_align_resolve_enum(const gchar * token,FoContext * context,GError ** error)176 fo_property_text_align_resolve_enum (const gchar *token,
177 FoContext *context,
178 GError **error)
179 {
180 g_return_val_if_fail (token != NULL, NULL);
181 g_return_val_if_fail (FO_IS_CONTEXT (context), NULL);
182 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
183
184 if ((strcmp (token, "start") == 0) ||
185 (strcmp (token, "center") == 0) ||
186 (strcmp (token, "end") == 0) ||
187 (strcmp (token, "justify") == 0) ||
188 (strcmp (token, "inside") == 0) ||
189 (strcmp (token, "outside") == 0) ||
190 (strcmp (token, "left") == 0) ||
191 (strcmp (token, "right") == 0))
192 {
193 return g_object_ref (fo_enum_factory_get_enum_by_nick (token));
194 }
195 else
196 {
197 g_set_error (error,
198 FO_FO_ERROR,
199 FO_FO_ERROR_ENUMERATION_TOKEN,
200 _(fo_fo_error_messages[FO_FO_ERROR_ENUMERATION_TOKEN]),
201 class_name,
202 token);
203 return NULL;
204 }
205 }
206
207 /**
208 * fo_property_text_align_validate:
209 * @datatype: #FoDatatype to be validated against allowed datatypes and
210 * values for current property.
211 * @context: #FoContext object from which to possibly inherit values.
212 * @error: Information about any error that has occurred.
213 *
214 * Validates @datatype against allowed values. Returns @datatype, a
215 * replacement datatype value, or NULL if validation failed.
216 *
217 * Return value: Valid datatype value or NULL.
218 **/
219 FoDatatype*
fo_property_text_align_validate(FoDatatype * datatype,FoContext * context,GError ** error)220 fo_property_text_align_validate (FoDatatype *datatype,
221 FoContext *context,
222 GError **error)
223 {
224 FoDatatype *new_datatype;
225 GError *tmp_error = NULL;
226 gchar *token;
227
228 g_return_val_if_fail (datatype != NULL, NULL);
229 g_return_val_if_fail (FO_IS_DATATYPE (datatype), NULL);
230 g_return_val_if_fail (context != NULL, NULL);
231 g_return_val_if_fail (FO_IS_CONTEXT (context), NULL);
232 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
233
234 if (FO_IS_ENUM (datatype))
235 {
236 FoEnumEnum value = fo_enum_get_value (datatype);
237
238 if ((value == FO_ENUM_ENUM_START) ||
239 (value == FO_ENUM_ENUM_CENTER) ||
240 (value == FO_ENUM_ENUM_END) ||
241 (value == FO_ENUM_ENUM_JUSTIFY) ||
242 (value == FO_ENUM_ENUM_INSIDE) ||
243 (value == FO_ENUM_ENUM_OUTSIDE) ||
244 (value == FO_ENUM_ENUM_LEFT) ||
245 (value == FO_ENUM_ENUM_RIGHT))
246 {
247 return datatype;
248 }
249 else
250 {
251 gchar *datatype_sprintf = fo_object_sprintf (datatype);
252
253 g_set_error (error,
254 FO_FO_ERROR,
255 FO_FO_ERROR_ENUMERATION_TOKEN,
256 _(fo_fo_error_messages[FO_FO_ERROR_ENUMERATION_TOKEN]),
257 class_name,
258 datatype_sprintf,
259 g_type_name (G_TYPE_FROM_INSTANCE (datatype)));
260
261 g_object_unref (datatype);
262
263 g_free (datatype_sprintf);
264
265 return NULL;
266 }
267 }
268 else if (FO_IS_STRING (datatype))
269 {
270 token = fo_string_get_value (datatype);
271
272 new_datatype =
273 fo_property_text_align_resolve_enum (token, context, &tmp_error);
274
275 g_object_unref (datatype);
276
277 fo_propagate_and_return_val_if_error (error, tmp_error, NULL);
278
279 return new_datatype;
280 }
281 else if (FO_IS_NAME (datatype))
282 {
283 token = fo_name_get_value (datatype);
284
285 new_datatype =
286 fo_property_text_align_resolve_enum (token, context, &tmp_error);
287
288 g_object_unref (datatype);
289
290 fo_propagate_and_return_val_if_error (error, tmp_error, NULL);
291
292 return new_datatype;
293 }
294 else if (FO_IS_STRING (datatype))
295 {
296 return datatype;
297 }
298 else
299 {
300 gchar *datatype_sprintf = fo_object_sprintf (datatype);
301
302 g_set_error (error,
303 FO_FO_ERROR,
304 FO_FO_ERROR_DATATYPE,
305 _(fo_fo_error_messages[FO_FO_ERROR_DATATYPE]),
306 class_name,
307 datatype_sprintf,
308 g_type_name (G_TYPE_FROM_INSTANCE (datatype)));
309
310 g_object_unref (datatype);
311
312 g_free (datatype_sprintf);
313
314 return NULL;
315 }
316 }
317
318 /**
319 * fo_property_text_align_get_initial:
320 *
321 * Get an instance of the property with the correct initial value.
322 *
323 * Return value: An instance of the property.
324 **/
325 FoProperty*
fo_property_text_align_get_initial(void)326 fo_property_text_align_get_initial (void)
327 {
328 static FoProperty *text_align = NULL;
329
330 if (text_align == NULL)
331 {
332 text_align =
333 fo_property_text_align_new ();
334 }
335
336 return text_align;
337 }
338