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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 | #include <glib.h> | |
29 | #include <glib/gstdio.h> | |
30 | #include <glib/gprintf.h> | |
31 | #include <glib/gi18n.h> | |
32 | ||
33 | #include "viking.h" | |
34 | #include "vikgototool.h" | |
35 | #include "vikgoto.h" | |
36 | ||
37 | /* Compatibility */ | |
38 | #if ! GLIB_CHECK_VERSION(2,22,0) | |
39 | #define g_mapped_file_unref g_mapped_file_free | |
40 | #endif | |
41 | ||
42 | static gchar *last_goto_str = NULL; | |
43 | static VikCoord *last_coord = NULL; | |
44 | static gchar *last_successful_goto_str = NULL; | |
45 | ||
46 | static GList *goto_tools_list = NULL; | |
47 | ||
48 | #define VIK_SETTINGS_GOTO_PROVIDER "goto_provider" | |
49 | int last_goto_tool = -1; | |
50 | ||
51 | void vik_goto_register ( VikGotoTool *tool ) | |
52 | { | |
53 | if ( IS_VIK_GOTO_TOOL( tool ) ) | |
54 | goto_tools_list = g_list_append ( goto_tools_list, g_object_ref ( tool ) ); | |
55 | } | |
56 | ||
57 | void vik_goto_unregister_all () | |
58 | { | |
59 | g_list_foreach ( goto_tools_list, (GFunc) g_object_unref, NULL ); | |
60 | } | |
61 | ||
62 | gchar * a_vik_goto_get_search_string_for_this_place(VikWindow *vw) | |
63 | { | |
64 | if (!last_coord) | |
65 | return NULL; | |
66 | ||
67 | VikViewport *vvp = vik_window_viewport(vw); | |
68 | const VikCoord *cur_center = vik_viewport_get_center(vvp); | |
69 | if (vik_coord_equals(cur_center, last_coord)) { | |
70 | return(last_successful_goto_str); | |
71 | } | |
72 | else | |
73 | return NULL; | |
74 | } | |
75 | ||
76 | static void display_no_tool(VikWindow *vw) | |
77 | { | |
78 | GtkWidget *dialog = NULL; | |
79 | ||
80 | dialog = gtk_message_dialog_new ( GTK_WINDOW(vw), GTK_DIALOG_MODAL, GTK_MESSAGE_WARNING, GTK_BUTTONS_OK, _("No goto tool available.") ); | |
81 | ||
82 | gtk_dialog_run ( GTK_DIALOG(dialog) ); | |
83 | ||
84 | gtk_widget_destroy(dialog); | |
85 | } | |
86 | ||
87 | static gboolean prompt_try_again(VikWindow *vw) | |
88 | { | |
89 | GtkWidget *dialog = NULL; | |
90 | gboolean ret = TRUE; | |
91 | ||
92 | dialog = gtk_dialog_new_with_buttons ( "", GTK_WINDOW(vw), 0, GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT, NULL ); | |
93 | gtk_window_set_title(GTK_WINDOW(dialog), _("goto")); | |
94 | ||
95 | GtkWidget *goto_label = gtk_label_new(_("I don't know that place. Do you want another goto?")); | |
96 | gtk_box_pack_start ( GTK_BOX(gtk_dialog_get_content_area(GTK_DIALOG(dialog))), goto_label, FALSE, FALSE, 5 ); | |
97 | gtk_dialog_set_default_response ( GTK_DIALOG(dialog), GTK_RESPONSE_ACCEPT ); | |
98 | gtk_widget_show_all(dialog); | |
99 | ||
100 | if ( gtk_dialog_run ( GTK_DIALOG(dialog) ) != GTK_RESPONSE_ACCEPT ) | |
101 | ret = FALSE; | |
102 | ||
103 | gtk_widget_destroy(dialog); | |
104 | return ret; | |
105 | } | |
106 | ||
107 | static gint find_entry = -1; | |
108 | static gint wanted_entry = -1; | |
109 | ||
110 | static void find_provider (gpointer elem, gpointer user_data) | |
111 | { | |
112 | const gchar *name = vik_goto_tool_get_label (elem); | |
113 | const gchar *provider = user_data; | |
114 | find_entry++; | |
115 | if (!strcmp(name, provider)) { | |
116 | wanted_entry = find_entry; | |
117 | } | |
118 | } | |
119 | ||
120 | /** | |
121 | * Setup last_goto_tool value | |
122 | */ | |
123 | static void get_provider () | |
124 | { | |
125 | // Use setting for the provider if available | |
126 | if ( last_goto_tool < 0 ) { | |
127 | find_entry = -1; | |
128 | wanted_entry = -1; | |
129 | gchar *provider = NULL; | |
130 | if ( a_settings_get_string ( VIK_SETTINGS_GOTO_PROVIDER, &provider ) ) { | |
131 | // Use setting | |
132 | if ( provider ) | |
133 | g_list_foreach (goto_tools_list, find_provider, provider); | |
134 | // If not found set it to the first entry, otherwise use the entry | |
135 | last_goto_tool = ( wanted_entry < 0 ) ? 0 : wanted_entry; | |
136 | } | |
137 | else | |
138 | last_goto_tool = 0; | |
139 | } | |
140 | } | |
141 | ||
142 | static gchar *a_prompt_for_goto_string(VikWindow *vw) | |
143 | { | |
144 | GtkWidget *dialog = NULL; | |
145 | ||
146 | dialog = gtk_dialog_new_with_buttons ( "", GTK_WINDOW(vw), 0, GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT, NULL ); | |
147 | gtk_window_set_title(GTK_WINDOW(dialog), _("goto")); | |
148 | ||
149 | GtkWidget *tool_label = gtk_label_new(_("goto provider:")); | |
150 | GtkWidget *tool_list = vik_combo_box_text_new (); | |
151 | GList *current = g_list_first (goto_tools_list); | |
152 | while (current != NULL) | |
153 | { | |
154 | char *label = NULL; | |
155 | VikGotoTool *tool = current->data; | |
156 | label = vik_goto_tool_get_label (tool); | |
157 | vik_combo_box_text_append ( tool_list, label ); | |
158 | current = g_list_next (current); | |
159 | } | |
160 | ||
161 | get_provider (); | |
162 | gtk_combo_box_set_active ( GTK_COMBO_BOX( tool_list ), last_goto_tool ); | |
163 | ||
164 | GtkWidget *goto_label = gtk_label_new(_("Enter address or place name:")); | |
165 | GtkWidget *goto_entry = gtk_entry_new(); | |
166 | if (last_goto_str) | |
167 | gtk_entry_set_text(GTK_ENTRY(goto_entry), last_goto_str); | |
168 | ||
169 | // 'ok' when press return in the entry | |
170 | g_signal_connect_swapped (goto_entry, "activate", G_CALLBACK(a_dialog_response_accept), dialog); | |
171 | ||
172 | gtk_box_pack_start ( GTK_BOX(gtk_dialog_get_content_area(GTK_DIALOG(dialog))), tool_label, FALSE, FALSE, 5 ); | |
173 | gtk_box_pack_start ( GTK_BOX(gtk_dialog_get_content_area(GTK_DIALOG(dialog))), tool_list, FALSE, FALSE, 5 ); | |
174 | gtk_box_pack_start ( GTK_BOX(gtk_dialog_get_content_area(GTK_DIALOG(dialog))), goto_label, FALSE, FALSE, 5 ); | |
175 | gtk_box_pack_start ( GTK_BOX(gtk_dialog_get_content_area(GTK_DIALOG(dialog))), goto_entry, FALSE, FALSE, 5 ); | |
176 | gtk_dialog_set_default_response ( GTK_DIALOG(dialog), GTK_RESPONSE_ACCEPT ); | |
177 | gtk_widget_show_all(dialog); | |
178 | ||
179 | // Ensure the text field has focus so we can start typing straight away | |
180 | gtk_widget_grab_focus ( goto_entry ); | |
181 | ||
182 | if ( gtk_dialog_run ( GTK_DIALOG(dialog) ) != GTK_RESPONSE_ACCEPT ) { | |
183 | gtk_widget_destroy(dialog); | |
184 | return NULL; | |
185 | } | |
186 | ||
187 | // TODO check if list is empty | |
188 | last_goto_tool = gtk_combo_box_get_active ( GTK_COMBO_BOX(tool_list) ); | |
189 | gchar *provider = vik_goto_tool_get_label ( g_list_nth_data (goto_tools_list, last_goto_tool) ); | |
190 | a_settings_set_string ( VIK_SETTINGS_GOTO_PROVIDER, provider ); | |
191 | ||
192 | gchar *goto_str = g_strdup ( gtk_entry_get_text ( GTK_ENTRY(goto_entry) ) ); | |
193 | ||
194 | gtk_widget_destroy(dialog); | |
195 | ||
196 | if (goto_str[0] != '\0') { | |
197 | if (last_goto_str) | |
198 | g_free(last_goto_str); | |
199 | last_goto_str = g_strdup(goto_str); | |
200 | } | |
201 | ||
202 | return(goto_str); /* goto_str needs to be freed by caller */ | |
203 | } | |
204 | ||
205 | /** | |
206 | * Goto a place when we already have a string to search on | |
207 | * | |
208 | * Returns: %TRUE if a successful lookup | |
209 | */ | |
210 | static gboolean vik_goto_place ( VikWindow *vw, VikViewport *vvp, gchar* name, VikCoord *vcoord ) | |
211 | { | |
212 | // Ensure last_goto_tool is given a value | |
213 | get_provider (); | |
214 | ||
215 | if ( goto_tools_list ) { | |
216 | VikGotoTool *gototool = g_list_nth_data ( goto_tools_list, last_goto_tool ); | |
217 | if ( gototool ) { | |
218 | if ( vik_goto_tool_get_coord ( gototool, vw, vvp, name, vcoord ) == 0 ) | |
219 | return TRUE; | |
220 | } | |
221 | } | |
222 | return FALSE; | |
223 | } | |
224 | ||
225 | void a_vik_goto(VikWindow *vw, VikViewport *vvp) | |
226 | { | |
227 | VikCoord new_center; | |
228 | gchar *s_str; | |
229 | gboolean more = TRUE; | |
230 | ||
231 | if (goto_tools_list == NULL) | |
232 | { | |
233 | /* Empty list */ | |
234 | display_no_tool(vw); | |
235 | return; | |
236 | } | |
237 | ||
238 | do { | |
239 | s_str = a_prompt_for_goto_string(vw); | |
240 | if ((!s_str) || (s_str[0] == 0)) { | |
241 | more = FALSE; | |
242 | } | |
243 | ||
244 | else if (!vik_goto_tool_get_coord(g_list_nth_data (goto_tools_list, last_goto_tool), vw, vvp, s_str, &new_center)) { | |
245 | if (last_coord) | |
246 | g_free(last_coord); | |
247 | last_coord = g_malloc(sizeof(VikCoord)); | |
248 | *last_coord = new_center; | |
249 | if (last_successful_goto_str) | |
250 | g_free(last_successful_goto_str); | |
251 | last_successful_goto_str = g_strdup(last_goto_str); | |
252 | vik_viewport_set_center_coord(vvp, &new_center, TRUE); | |
253 | more = FALSE; | |
254 | } | |
255 | else if (!prompt_try_again(vw)) | |
256 | more = FALSE; | |
257 | g_free(s_str); | |
258 | } while (more); | |
259 | } | |
260 | ||
261 | #define HOSTIP_LATITUDE_PATTERN "\"lat\":\"" | |
262 | #define HOSTIP_LONGITUDE_PATTERN "\"lng\":\"" | |
263 | #define HOSTIP_CITY_PATTERN "\"city\":\"" | |
264 | #define HOSTIP_COUNTRY_PATTERN "\"country_name\":\"" | |
265 | ||
266 | /** | |
267 | * Automatic attempt to find out where you are using: | |
268 | * 1. http://www.hostip.info ++ | |
269 | * 2. if not specific enough fallback to using the default goto tool with a country name | |
270 | * ++ Using returned JSON information | |
271 | * c.f. with googlesearch.c - similar implementation is used here | |
272 | * | |
273 | * returns: | |
274 | * 0 if failed to locate anything | |
275 | * 1 if exact latitude/longitude found | |
276 | * 2 if position only as precise as a city | |
277 | * 3 if position only as precise as a country | |
278 | * @name: Contains the name of place found. Free this string after use. | |
279 | */ | |
280 | gint a_vik_goto_where_am_i ( VikViewport *vvp, struct LatLon *ll, gchar **name ) | |
281 | { | |
282 | gint result = 0; | |
283 | *name = NULL; | |
284 | ||
285 | gchar *tmpname = a_download_uri_to_tmp_file ( "http://api.hostip.info/get_json.php?position=true", NULL ); | |
286 | //gchar *tmpname = g_strdup ("../test/hostip2.json"); | |
287 | if (!tmpname) { | |
288 | return result; | |
289 | } | |
290 | ||
291 | ll->lat = 0.0; | |
292 | ll->lon = 0.0; | |
293 | ||
294 | gchar *pat; | |
295 | GMappedFile *mf; | |
296 | gchar *ss; | |
297 | gint fragment_len; | |
298 | ||
299 | gchar lat_buf[32], lon_buf[32]; | |
300 | lat_buf[0] = lon_buf[0] = '\0'; | |
301 | gchar *country = NULL; | |
302 | gchar *city = NULL; | |
303 | ||
304 | if ((mf = g_mapped_file_new(tmpname, FALSE, NULL)) == NULL) { | |
305 | g_critical(_("couldn't map temp file")); | |
306 | goto tidy; | |
307 | } | |
308 | ||
309 | gsize len = g_mapped_file_get_length(mf); | |
310 | gchar *text = g_mapped_file_get_contents(mf); | |
311 | ||
312 | if ((pat = g_strstr_len(text, len, HOSTIP_COUNTRY_PATTERN))) { | |
313 | pat += strlen(HOSTIP_COUNTRY_PATTERN); | |
314 | fragment_len = 0; | |
315 | ss = pat; | |
316 | while (*pat != '"') { | |
317 | fragment_len++; | |
318 | pat++; | |
319 | } | |
320 | country = g_strndup(ss, fragment_len); | |
321 | } | |
322 | ||
323 | if ((pat = g_strstr_len(text, len, HOSTIP_CITY_PATTERN))) { | |
324 | pat += strlen(HOSTIP_CITY_PATTERN); | |
325 | fragment_len = 0; | |
326 | ss = pat; | |
327 | while (*pat != '"') { | |
328 | fragment_len++; | |
329 | pat++; | |
330 | } | |
331 | city = g_strndup(ss, fragment_len); | |
332 | } | |
333 | ||
334 | if ((pat = g_strstr_len(text, len, HOSTIP_LATITUDE_PATTERN))) { | |
335 | pat += strlen(HOSTIP_LATITUDE_PATTERN); | |
336 | ss = lat_buf; | |
337 | if (*pat == '-') | |
338 | *ss++ = *pat++; | |
339 | while ((ss < (lat_buf + sizeof(lat_buf))) && (pat < (text + len)) && | |
340 | (g_ascii_isdigit(*pat) || (*pat == '.'))) | |
341 | *ss++ = *pat++; | |
342 | *ss = '\0'; | |
343 | ll->lat = g_ascii_strtod(lat_buf, NULL); | |
344 | } | |
345 | ||
346 | if ((pat = g_strstr_len(text, len, HOSTIP_LONGITUDE_PATTERN))) { | |
347 | pat += strlen(HOSTIP_LONGITUDE_PATTERN); | |
348 | ss = lon_buf; | |
349 | if (*pat == '-') | |
350 | *ss++ = *pat++; | |
351 | while ((ss < (lon_buf + sizeof(lon_buf))) && (pat < (text + len)) && | |
352 | (g_ascii_isdigit(*pat) || (*pat == '.'))) | |
353 | *ss++ = *pat++; | |
354 | *ss = '\0'; | |
355 | ll->lon = g_ascii_strtod(lon_buf, NULL); | |
356 | } | |
357 | ||
358 | if ( ll->lat != 0.0 && ll->lon != 0.0 ) { | |
359 | if ( ll->lat > -90.0 && ll->lat < 90.0 && ll->lon > -180.0 && ll->lon < 180.0 ) { | |
360 | // Found a 'sensible' & 'precise' location | |
361 | result = 1; | |
362 | *name = g_strdup ( _("Locality") ); //Albeit maybe not known by an actual name! | |
363 | } | |
364 | } | |
365 | else { | |
366 | // Hopefully city name is unique enough to lookup position on | |
367 | // Maybe for American places where hostip appends the State code on the end | |
368 | // But if the country code is not appended if could easily get confused | |
369 | // e.g. 'Portsmouth' could be at least | |
370 | // Portsmouth, Hampshire, UK or | |
371 | // Portsmouth, Viginia, USA. | |
372 | ||
373 | // Try city name lookup | |
374 | if ( city ) { | |
375 | g_debug ( "%s: found city %s", __FUNCTION__, city ); | |
376 | if ( strcmp ( city, "(Unknown city)" ) != 0 ) { | |
377 | VikCoord new_center; | |
378 | if ( vik_goto_place ( NULL, vvp, city, &new_center ) ) { | |
379 | // Got something | |
380 | vik_coord_to_latlon ( &new_center, ll ); | |
381 | result = 2; | |
382 | *name = city; | |
383 | goto tidy; | |
384 | } | |
385 | } | |
386 | } | |
387 | ||
388 | // Try country name lookup | |
389 | if ( country ) { | |
390 | g_debug ( "%s: found country %s", __FUNCTION__, country ); | |
391 | if ( strcmp ( country, "(Unknown Country)" ) != 0 ) { | |
392 | VikCoord new_center; | |
393 | if ( vik_goto_place ( NULL, vvp, country, &new_center ) ) { | |
394 | // Finally got something | |
395 | vik_coord_to_latlon ( &new_center, ll ); | |
396 | result = 3; | |
397 | *name = country; | |
398 | goto tidy; | |
399 | } | |
400 | } | |
401 | } | |
402 | } | |
403 | ||
404 | tidy: | |
405 | g_mapped_file_unref ( mf ); | |
406 | g_remove ( tmpname ); | |
407 | g_free ( tmpname ); | |
408 | return result; | |
409 | } |