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1 | /* | |
2 | * viking -- GPS Data and Topo Analyzer, Explorer, and Manager | |
3 | * | |
4 | * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net> | |
5 | * Copyright (C) 2009, Guilhem Bonnefille <guilhem.bonnefille@gmail.com> | |
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 | #ifdef HAVE_CONFIG_H | |
23 | #include "config.h" | |
24 | #endif | |
25 | #include <stdlib.h> | |
26 | #include <stdio.h> | |
27 | #include <string.h> | |
28 | #ifdef HAVE_MATH_H | |
29 | #include <math.h> | |
30 | #endif | |
31 | #include <glib.h> | |
32 | #include <glib/gstdio.h> | |
33 | #include <glib/gprintf.h> | |
34 | #include <glib/gi18n.h> | |
35 | ||
36 | #include "viking.h" | |
37 | ||
38 | #include "vikgotoxmltool.h" | |
39 | ||
40 | static void vik_goto_xml_tool_finalize ( GObject *gob ); | |
41 | ||
42 | static gchar *vik_goto_xml_tool_get_url_format ( VikGotoTool *self ); | |
43 | static gboolean vik_goto_xml_tool_parse_file_for_latlon(VikGotoTool *self, gchar *filename, struct LatLon *ll); | |
44 | ||
45 | typedef struct _VikGotoXmlToolPrivate VikGotoXmlToolPrivate; | |
46 | ||
47 | struct _VikGotoXmlToolPrivate | |
48 | { | |
49 | gchar *url_format; | |
50 | gchar *lat_path; | |
51 | gchar *lat_attr; | |
52 | gchar *lon_path; | |
53 | gchar *lon_attr; | |
54 | ||
55 | struct LatLon ll; | |
56 | }; | |
57 | ||
58 | #define GOTO_XML_TOOL_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), \ | |
59 | VIK_GOTO_XML_TOOL_TYPE, \ | |
60 | VikGotoXmlToolPrivate)) | |
61 | ||
62 | G_DEFINE_TYPE (VikGotoXmlTool, vik_goto_xml_tool, VIK_GOTO_TOOL_TYPE) | |
63 | ||
64 | enum | |
65 | { | |
66 | PROP_0, | |
67 | ||
68 | PROP_URL_FORMAT, | |
69 | PROP_LAT_PATH, | |
70 | PROP_LAT_ATTR, | |
71 | PROP_LON_PATH, | |
72 | PROP_LON_ATTR, | |
73 | }; | |
74 | ||
75 | static void | |
76 | vik_goto_xml_tool_set_property (GObject *object, | |
77 | guint property_id, | |
78 | const GValue *value, | |
79 | GParamSpec *pspec) | |
80 | { | |
81 | VikGotoXmlTool *self = VIK_GOTO_XML_TOOL (object); | |
82 | VikGotoXmlToolPrivate *priv = GOTO_XML_TOOL_GET_PRIVATE (self); | |
83 | gchar **splitted = NULL; | |
84 | ||
85 | switch (property_id) | |
86 | { | |
87 | case PROP_URL_FORMAT: | |
88 | g_free (priv->url_format); | |
89 | priv->url_format = g_value_dup_string (value); | |
90 | break; | |
91 | ||
92 | case PROP_LAT_PATH: | |
93 | splitted = g_strsplit (g_value_get_string (value), "@", 2); | |
94 | g_free (priv->lat_path); | |
95 | priv->lat_path = splitted[0]; | |
96 | if (splitted[1]) | |
97 | { | |
98 | g_object_set (object, "lat-attr", splitted[1], NULL); | |
99 | g_free (splitted[1]); | |
100 | } | |
101 | /* only free the tab, not the strings */ | |
102 | g_free (splitted); | |
103 | splitted = NULL; | |
104 | break; | |
105 | ||
106 | case PROP_LAT_ATTR: | |
107 | /* Avoid to overwrite XPATH value */ | |
108 | /* NB: This disable future overwriting, | |
109 | but as property is CONSTRUCT_ONLY there is no matter */ | |
110 | if (!priv->lat_attr || g_value_get_string (value)) | |
111 | { | |
112 | g_free (priv->lat_attr); | |
113 | priv->lat_attr = g_value_dup_string (value); | |
114 | } | |
115 | break; | |
116 | ||
117 | case PROP_LON_PATH: | |
118 | splitted = g_strsplit (g_value_get_string (value), "@", 2); | |
119 | g_free (priv->lon_path); | |
120 | priv->lon_path = splitted[0]; | |
121 | if (splitted[1]) | |
122 | { | |
123 | g_object_set (object, "lon-attr", splitted[1], NULL); | |
124 | g_free (splitted[1]); | |
125 | } | |
126 | /* only free the tab, not the strings */ | |
127 | g_free (splitted); | |
128 | splitted = NULL; | |
129 | break; | |
130 | ||
131 | case PROP_LON_ATTR: | |
132 | /* Avoid to overwrite XPATH value */ | |
133 | /* NB: This disable future overwriting, | |
134 | but as property is CONSTRUCT_ONLY there is no matter */ | |
135 | if (!priv->lon_attr || g_value_get_string (value)) | |
136 | { | |
137 | g_free (priv->lon_attr); | |
138 | priv->lon_attr = g_value_dup_string (value); | |
139 | } | |
140 | break; | |
141 | ||
142 | default: | |
143 | /* We don't have any other property... */ | |
144 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); | |
145 | break; | |
146 | } | |
147 | } | |
148 | ||
149 | static void | |
150 | vik_goto_xml_tool_get_property (GObject *object, | |
151 | guint property_id, | |
152 | GValue *value, | |
153 | GParamSpec *pspec) | |
154 | { | |
155 | VikGotoXmlTool *self = VIK_GOTO_XML_TOOL (object); | |
156 | VikGotoXmlToolPrivate *priv = GOTO_XML_TOOL_GET_PRIVATE (self); | |
157 | ||
158 | switch (property_id) | |
159 | { | |
160 | case PROP_URL_FORMAT: | |
161 | g_value_set_string (value, priv->url_format); | |
162 | break; | |
163 | ||
164 | case PROP_LAT_PATH: | |
165 | g_value_set_string (value, priv->lat_path); | |
166 | break; | |
167 | ||
168 | case PROP_LAT_ATTR: | |
169 | g_value_set_string (value, priv->lat_attr); | |
170 | break; | |
171 | ||
172 | case PROP_LON_PATH: | |
173 | g_value_set_string (value, priv->lon_path); | |
174 | break; | |
175 | ||
176 | case PROP_LON_ATTR: | |
177 | g_value_set_string (value, priv->lon_attr); | |
178 | break; | |
179 | ||
180 | default: | |
181 | /* We don't have any other property... */ | |
182 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); | |
183 | break; | |
184 | } | |
185 | } | |
186 | ||
187 | static void | |
188 | vik_goto_xml_tool_class_init ( VikGotoXmlToolClass *klass ) | |
189 | { | |
190 | GObjectClass *object_class; | |
191 | VikGotoToolClass *parent_class; | |
192 | GParamSpec *pspec; | |
193 | ||
194 | object_class = G_OBJECT_CLASS (klass); | |
195 | ||
196 | object_class->finalize = vik_goto_xml_tool_finalize; | |
197 | object_class->set_property = vik_goto_xml_tool_set_property; | |
198 | object_class->get_property = vik_goto_xml_tool_get_property; | |
199 | ||
200 | ||
201 | pspec = g_param_spec_string ("url-format", | |
202 | "URL format", | |
203 | "The format of the URL", | |
204 | "<no-set>" /* default value */, | |
205 | G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); | |
206 | g_object_class_install_property (object_class, | |
207 | PROP_URL_FORMAT, | |
208 | pspec); | |
209 | ||
210 | pspec = g_param_spec_string ("lat-path", | |
211 | "Latitude path", | |
212 | "XPath of the latitude", | |
213 | "<no-set>" /* default value */, | |
214 | G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); | |
215 | g_object_class_install_property (object_class, | |
216 | PROP_LAT_PATH, | |
217 | pspec); | |
218 | ||
219 | pspec = g_param_spec_string ("lat-attr", | |
220 | "Latitude attribute", | |
221 | "XML attribute of the latitude", | |
222 | NULL /* default value */, | |
223 | G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); | |
224 | g_object_class_install_property (object_class, | |
225 | PROP_LAT_ATTR, | |
226 | pspec); | |
227 | ||
228 | pspec = g_param_spec_string ("lon-path", | |
229 | "Longitude path", | |
230 | "XPath of the longitude", | |
231 | "<no-set>" /* default value */, | |
232 | G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); | |
233 | g_object_class_install_property (object_class, | |
234 | PROP_LON_PATH, | |
235 | pspec); | |
236 | ||
237 | pspec = g_param_spec_string ("lon-attr", | |
238 | "Longitude attribute", | |
239 | "XML attribute of the longitude", | |
240 | NULL /* default value */, | |
241 | G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); | |
242 | g_object_class_install_property (object_class, | |
243 | PROP_LON_ATTR, | |
244 | pspec); | |
245 | ||
246 | parent_class = VIK_GOTO_TOOL_CLASS (klass); | |
247 | ||
248 | parent_class->get_url_format = vik_goto_xml_tool_get_url_format; | |
249 | parent_class->parse_file_for_latlon = vik_goto_xml_tool_parse_file_for_latlon; | |
250 | ||
251 | g_type_class_add_private (klass, sizeof (VikGotoXmlToolPrivate)); | |
252 | } | |
253 | ||
254 | VikGotoXmlTool * | |
255 | vik_goto_xml_tool_new () | |
256 | { | |
257 | return VIK_GOTO_XML_TOOL ( g_object_new ( VIK_GOTO_XML_TOOL_TYPE, "label", "Google", NULL ) ); | |
258 | } | |
259 | ||
260 | static void | |
261 | vik_goto_xml_tool_init ( VikGotoXmlTool *self ) | |
262 | { | |
263 | VikGotoXmlToolPrivate *priv = GOTO_XML_TOOL_GET_PRIVATE (self); | |
264 | priv->url_format = NULL; | |
265 | priv->lat_path = NULL; | |
266 | priv->lat_attr = NULL; | |
267 | priv->lon_path = NULL; | |
268 | priv->lon_attr = NULL; | |
269 | // | |
270 | priv->ll.lat = NAN; | |
271 | priv->ll.lon = NAN; | |
272 | } | |
273 | ||
274 | static void | |
275 | vik_goto_xml_tool_finalize ( GObject *gob ) | |
276 | { | |
277 | G_OBJECT_GET_CLASS(gob)->finalize(gob); | |
278 | } | |
279 | ||
280 | static gboolean | |
281 | stack_is_path (const GSList *stack, | |
282 | const gchar *path) | |
283 | { | |
284 | gboolean equal = TRUE; | |
285 | int stack_len = g_list_length((GList *)stack); | |
286 | int i = 0; | |
287 | i = stack_len - 1; | |
288 | while (equal == TRUE && i >= 0) | |
289 | { | |
290 | if (*path != '/') | |
291 | equal = FALSE; | |
292 | else | |
293 | path++; | |
294 | const gchar *current = g_list_nth_data((GList *)stack, i); | |
295 | size_t len = strlen(current); | |
296 | if (strncmp(path, current, len) != 0 ) | |
297 | equal = FALSE; | |
298 | else | |
299 | { | |
300 | path += len; | |
301 | } | |
302 | i--; | |
303 | } | |
304 | if (*path != '\0') | |
305 | equal = FALSE; | |
306 | return equal; | |
307 | } | |
308 | ||
309 | /* Called for open tags <foo bar="baz"> */ | |
310 | static void | |
311 | _start_element (GMarkupParseContext *context, | |
312 | const gchar *element_name, | |
313 | const gchar **attribute_names, | |
314 | const gchar **attribute_values, | |
315 | gpointer user_data, | |
316 | GError **error) | |
317 | { | |
318 | VikGotoXmlTool *self = VIK_GOTO_XML_TOOL (user_data); | |
319 | VikGotoXmlToolPrivate *priv = GOTO_XML_TOOL_GET_PRIVATE (self); | |
320 | const GSList *stack = g_markup_parse_context_get_element_stack (context); | |
321 | /* Longitude */ | |
322 | if (priv->lon_attr != NULL && isnan(priv->ll.lon) && stack_is_path (stack, priv->lon_path)) | |
323 | { | |
324 | int i=0; | |
325 | while (attribute_names[i] != NULL) | |
326 | { | |
327 | if (strcmp (attribute_names[i], priv->lon_attr) == 0) | |
328 | { | |
329 | priv->ll.lon = g_ascii_strtod(attribute_values[i], NULL); | |
330 | } | |
331 | i++; | |
332 | } | |
333 | } | |
334 | /* Latitude */ | |
335 | if (priv->lat_attr != NULL && isnan(priv->ll.lat) && stack_is_path (stack, priv->lat_path)) | |
336 | { | |
337 | int i=0; | |
338 | while (attribute_names[i] != NULL) | |
339 | { | |
340 | if (strcmp (attribute_names[i], priv->lat_attr) == 0) | |
341 | { | |
342 | priv->ll.lat = g_ascii_strtod(attribute_values[i], NULL); | |
343 | } | |
344 | i++; | |
345 | } | |
346 | } | |
347 | } | |
348 | ||
349 | /* Called for character data */ | |
350 | /* text is not nul-terminated */ | |
351 | static void | |
352 | _text (GMarkupParseContext *context, | |
353 | const gchar *text, | |
354 | gsize text_len, | |
355 | gpointer user_data, | |
356 | GError **error) | |
357 | { | |
358 | VikGotoXmlTool *self = VIK_GOTO_XML_TOOL (user_data); | |
359 | VikGotoXmlToolPrivate *priv = GOTO_XML_TOOL_GET_PRIVATE (self); | |
360 | const GSList *stack = g_markup_parse_context_get_element_stack (context); | |
361 | gchar *textl = g_strndup(text, text_len); | |
362 | /* Store only first result */ | |
363 | if (priv->lat_attr == NULL && isnan(priv->ll.lat) && stack_is_path (stack, priv->lat_path)) | |
364 | { | |
365 | priv->ll.lat = g_ascii_strtod(textl, NULL); | |
366 | } | |
367 | if (priv->lon_attr == NULL && isnan(priv->ll.lon) && stack_is_path (stack, priv->lon_path)) | |
368 | { | |
369 | priv->ll.lon = g_ascii_strtod(textl, NULL); | |
370 | } | |
371 | g_free(textl); | |
372 | } | |
373 | ||
374 | static gboolean | |
375 | vik_goto_xml_tool_parse_file_for_latlon(VikGotoTool *self, gchar *filename, struct LatLon *ll) | |
376 | { | |
377 | GMarkupParser xml_parser; | |
378 | GMarkupParseContext *xml_context = NULL; | |
379 | GError *error = NULL; | |
380 | VikGotoXmlToolPrivate *priv = GOTO_XML_TOOL_GET_PRIVATE (self); | |
381 | g_return_val_if_fail(priv != NULL, FALSE); | |
382 | ||
383 | g_debug ("%s: %s@%s, %s@%s", | |
384 | __FUNCTION__, | |
385 | priv->lat_path, priv->lat_attr, | |
386 | priv->lon_path, priv->lon_attr); | |
387 | ||
388 | FILE *file = g_fopen (filename, "r"); | |
389 | if (file == NULL) | |
390 | /* TODO emit warning */ | |
391 | return FALSE; | |
392 | ||
393 | /* setup context parse (ie callbacks) */ | |
394 | if (priv->lat_attr != NULL || priv->lon_attr != NULL) | |
395 | // At least one coordinate uses an attribute | |
396 | xml_parser.start_element = &_start_element; | |
397 | else | |
398 | xml_parser.start_element = NULL; | |
399 | xml_parser.end_element = NULL; | |
400 | if (priv->lat_attr == NULL || priv->lon_attr == NULL) | |
401 | // At least one coordinate uses a raw element | |
402 | xml_parser.text = &_text; | |
403 | else | |
404 | xml_parser.text = NULL; | |
405 | xml_parser.passthrough = NULL; | |
406 | xml_parser.error = NULL; | |
407 | ||
408 | xml_context = g_markup_parse_context_new(&xml_parser, 0, self, NULL); | |
409 | ||
410 | /* setup result */ | |
411 | priv->ll.lat = NAN; | |
412 | priv->ll.lon = NAN; | |
413 | ||
414 | gchar buff[BUFSIZ]; | |
415 | size_t nb; | |
416 | while (xml_context && | |
417 | (nb = fread (buff, sizeof(gchar), BUFSIZ, file)) > 0) | |
418 | { | |
419 | if (!g_markup_parse_context_parse(xml_context, buff, nb, &error)) | |
420 | { | |
421 | fprintf(stderr, "%s: parsing error: %s.\n", | |
422 | __FUNCTION__, error->message); | |
423 | g_markup_parse_context_free(xml_context); | |
424 | xml_context = NULL; | |
425 | } | |
426 | g_clear_error (&error); | |
427 | } | |
428 | /* cleanup */ | |
429 | if (xml_context && | |
430 | !g_markup_parse_context_end_parse(xml_context, &error)) | |
431 | fprintf(stderr, "%s: errors occurred while reading file: %s.\n", | |
432 | __FUNCTION__, error->message); | |
433 | g_clear_error (&error); | |
434 | ||
435 | if (xml_context) | |
436 | g_markup_parse_context_free(xml_context); | |
437 | xml_context = NULL; | |
438 | fclose (file); | |
439 | ||
440 | if (ll != NULL) | |
441 | { | |
442 | *ll = priv->ll; | |
443 | } | |
444 | ||
445 | if (isnan(priv->ll.lat) || isnan(priv->ll.lat)) | |
446 | /* At least one coordinate not found */ | |
447 | return FALSE; | |
448 | else | |
449 | return TRUE; | |
450 | } | |
451 | ||
452 | static gchar * | |
453 | vik_goto_xml_tool_get_url_format ( VikGotoTool *self ) | |
454 | { | |
455 | VikGotoXmlToolPrivate *priv = GOTO_XML_TOOL_GET_PRIVATE (self); | |
456 | g_return_val_if_fail(priv != NULL, NULL); | |
457 | return priv->url_format; | |
458 | } |