]>
Commit | Line | Data |
---|---|---|
1 | %headertop{ | |
2 | #ifdef HAVE_CONFIG_H | |
3 | #include "config.h" | |
4 | #endif | |
5 | ||
6 | #include "vikcoord.h" | |
7 | #include "mapcoord.h" | |
8 | #include "vik-map-type.h" | |
9 | %} | |
10 | ||
11 | %{ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <string.h> | |
16 | #include <glib/gi18n.h> | |
17 | #include <gtk/gtk.h> | |
18 | #include <math.h> | |
19 | #include <string.h> | |
20 | #include "coords.h" | |
21 | #include "vikcoord.h" | |
22 | #include "mapcoord.h" | |
23 | #include "download.h" | |
24 | #include "curl_download.h" | |
25 | #include "globals.h" | |
26 | #include "google.h" | |
27 | #include "vikmapslayer.h" | |
28 | %} | |
29 | ||
30 | %h{ | |
31 | ||
32 | typedef enum { | |
33 | TYPE_GOOGLE_MAPS = 0, | |
34 | TYPE_GOOGLE_TRANS, | |
35 | TYPE_GOOGLE_SAT, | |
36 | TYPE_GOOGLE_TERRAIN, | |
37 | ||
38 | TYPE_GOOGLE_NUM | |
39 | } GoogleType; | |
40 | ||
41 | %} | |
42 | ||
43 | %{ | |
44 | ||
45 | static DownloadOptions google_options = { "http://maps.google.com/", 0, a_check_map_file }; | |
46 | ||
47 | /* 1 << (x) is like a 2**(x) */ | |
48 | #define GZ(x) ((1<<x)) | |
49 | ||
50 | static const gdouble scale_mpps[] = { GZ(0), GZ(1), GZ(2), GZ(3), GZ(4), GZ(5), GZ(6), GZ(7), GZ(8), GZ(9), | |
51 | GZ(10), GZ(11), GZ(12), GZ(13), GZ(14), GZ(15), GZ(16), GZ(17) }; | |
52 | ||
53 | static const gint num_scales = (sizeof(scale_mpps) / sizeof(scale_mpps[0])); | |
54 | ||
55 | #define ERROR_MARGIN 0.01 | |
56 | guint8 google_zoom ( gdouble mpp ) { | |
57 | gint i; | |
58 | for ( i = 0; i < num_scales; i++ ) { | |
59 | if ( ABS(scale_mpps[i] - mpp) < ERROR_MARGIN ) | |
60 | return i; | |
61 | } | |
62 | return 255; | |
63 | } | |
64 | ||
65 | ||
66 | static gchar *parse_version_number(gchar *text) | |
67 | { | |
68 | int i; | |
69 | gchar *vers; | |
70 | gchar *s = text; | |
71 | ||
72 | for (i = 0; (s[i] != '\\') && (i < 8); i++) | |
73 | ; | |
74 | if (s[i] != '\\') { | |
75 | return NULL; | |
76 | } | |
77 | ||
78 | return vers = g_strndup(s, i); | |
79 | } | |
80 | ||
81 | static const gchar *google_version_number(MapCoord *mapcoord, GoogleType google_type) | |
82 | { | |
83 | static gboolean first = TRUE; | |
84 | static char *vers[] = { "w2.80", "w2t.80", "30", "w2p.81"}; | |
85 | FILE *tmp_file; | |
86 | int tmp_fd; | |
87 | gchar *tmpname; | |
88 | gchar *uri; | |
89 | VikCoord coord; | |
90 | gchar coord_north_south[G_ASCII_DTOSTR_BUF_SIZE], coord_east_west[G_ASCII_DTOSTR_BUF_SIZE]; | |
91 | gchar *text, *pat, *beg; | |
92 | GMappedFile *mf; | |
93 | gsize len; | |
94 | gchar *gvers, *tvers, *kvers, *terrvers, *tmpvers; | |
95 | static DownloadOptions dl_options = { "http://maps.google.com/", 0, a_check_map_file }; | |
96 | /* static const char *gvers_pat = "http://mt0.google.com/mt?v\\x3d"; */ | |
97 | static const char *gvers_pat = "http://mt0.google.com/mt"; | |
98 | static const char *kvers_pat = "http://khm0.google.com/kh?v\\x3d"; | |
99 | ||
100 | g_assert(google_type < TYPE_GOOGLE_NUM); | |
101 | ||
102 | if (!first) | |
103 | return (vers[google_type]); | |
104 | ||
105 | ||
106 | first = FALSE; | |
107 | gvers = tvers = kvers = terrvers = NULL; | |
108 | if ((tmp_fd = g_file_open_tmp ("vikgvers.XXXXXX", &tmpname, NULL)) == -1) { | |
109 | g_critical(_("couldn't open temp file %s"), tmpname); | |
110 | exit(1); | |
111 | } | |
112 | ||
113 | google_mapcoord_to_center_coord(mapcoord, &coord); | |
114 | uri = g_strdup_printf("http://maps.google.com/maps?f=q&hl=en&q=%s,%s", | |
115 | g_ascii_dtostr (coord_north_south, G_ASCII_DTOSTR_BUF_SIZE, (gdouble) coord.north_south), | |
116 | g_ascii_dtostr (coord_east_west, G_ASCII_DTOSTR_BUF_SIZE, (gdouble) coord.east_west)); | |
117 | tmp_file = fdopen(tmp_fd, "r+"); | |
118 | ||
119 | if (curl_download_uri(uri, tmp_file, &dl_options)) { /* error */ | |
120 | g_warning(_("Failed downloading %s"), tmpname); | |
121 | } else { | |
122 | if ((mf = g_mapped_file_new(tmpname, FALSE, NULL)) == NULL) { | |
123 | g_critical(_("couldn't map temp file")); | |
124 | exit(1); | |
125 | } | |
126 | len = g_mapped_file_get_length(mf); | |
127 | text = g_mapped_file_get_contents(mf); | |
128 | ||
129 | if ((beg = g_strstr_len(text, len, "GLoadApi")) == NULL) { | |
130 | g_warning(_("Failed fetching Google numbers (\"GLoadApi\" not found)")); | |
131 | goto failed; | |
132 | } | |
133 | ||
134 | pat = beg; | |
135 | while (!gvers || !tvers ||!terrvers) { | |
136 | if ((pat = g_strstr_len(pat, &text[len] - pat, gvers_pat)) != NULL) { | |
137 | pat += strlen(gvers_pat); | |
138 | if ((pat[0] != '/' && pat[0] != '?') || | |
139 | pat[1] != 'v' || pat[2] != '\\' || | |
140 | pat[3] != 'x' || pat[4] != '3' || pat[5] != 'd') | |
141 | continue; | |
142 | pat += 6; | |
143 | if ((tmpvers = parse_version_number(pat)) != NULL) { | |
144 | if (strstr(tmpvers, "t.")) | |
145 | tvers = tmpvers; | |
146 | else if (strstr(tmpvers, "p.")) | |
147 | terrvers = tmpvers; | |
148 | else | |
149 | gvers = tmpvers; | |
150 | } | |
151 | } | |
152 | else | |
153 | break; | |
154 | } | |
155 | ||
156 | if ((pat = g_strstr_len(beg, &text[len] - beg, kvers_pat)) != NULL) | |
157 | kvers = parse_version_number(pat + strlen(kvers_pat)); | |
158 | ||
159 | if (gvers && tvers && kvers) { | |
160 | vers[TYPE_GOOGLE_MAPS] = gvers; | |
161 | vers[TYPE_GOOGLE_TRANS] = tvers; | |
162 | vers[TYPE_GOOGLE_SAT] = kvers; | |
163 | vers[TYPE_GOOGLE_TERRAIN] = terrvers; | |
164 | } | |
165 | else | |
166 | g_warning(_("Failed getting google version numbers")); | |
167 | ||
168 | if (gvers) | |
169 | fprintf(stderr, "DEBUG gvers=%s\n", gvers); | |
170 | if (tvers) | |
171 | fprintf(stderr, "DEBUG tvers=%s\n", tvers); | |
172 | if (terrvers) | |
173 | fprintf(stderr, "DEBUG terrvers=%s\n", terrvers); | |
174 | if (kvers) | |
175 | fprintf(stderr, "DEBUG kvers=%s\n", kvers); | |
176 | ||
177 | failed: | |
178 | g_mapped_file_free(mf); | |
179 | } | |
180 | ||
181 | fclose(tmp_file); | |
182 | tmp_file = NULL; | |
183 | g_free(tmpname); | |
184 | g_free (uri); | |
185 | return (vers[google_type]); | |
186 | } | |
187 | ||
188 | static int real_google_download ( MapCoord *src, const gchar *dest_fn, const char *verstr ) | |
189 | { | |
190 | int res; | |
191 | gchar *uri = g_strdup_printf ( "/mt?n=404&v=%s&x=%d&y=%d&zoom=%d", verstr, src->x, src->y, src->scale ); | |
192 | res = a_http_download_get_url ( "mt.google.com", uri, dest_fn, &google_options ); | |
193 | g_free ( uri ); | |
194 | return res; | |
195 | } | |
196 | ||
197 | %} | |
198 | ||
199 | class Google:Map:Type from Vik:Map:Type { | |
200 | private GoogleType type; | |
201 | ||
202 | override (Vik:Map:Type) gboolean | |
203 | coord_to_mapcoord ( Vik:Map:Type *self, const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest ) | |
204 | { | |
205 | g_assert ( src->mode == VIK_COORD_LATLON ); | |
206 | ||
207 | if ( xzoom != yzoom ) | |
208 | return FALSE; | |
209 | ||
210 | dest->scale = google_zoom ( xzoom ); | |
211 | if ( dest->scale == 255 ) | |
212 | return FALSE; | |
213 | ||
214 | dest->x = (src->east_west + 180) / 360 * GZ(17) / xzoom; | |
215 | dest->y = (180 - MERCLAT(src->north_south)) / 360 * GZ(17) / xzoom; | |
216 | dest->z = 0; | |
217 | ||
218 | return TRUE; | |
219 | } | |
220 | ||
221 | override (Vik:Map:Type) void | |
222 | mapcoord_to_center_coord ( Vik:Map:Type *self, MapCoord *src, VikCoord *dest ) | |
223 | { | |
224 | gdouble socalled_mpp = GZ(src->scale); | |
225 | dest->mode = VIK_COORD_LATLON; | |
226 | dest->east_west = ((src->x+0.5) / GZ(17) * socalled_mpp * 360) - 180; | |
227 | dest->north_south = DEMERCLAT(180 - ((src->y+0.5) / GZ(17) * socalled_mpp * 360)); | |
228 | } | |
229 | ||
230 | override (Vik:Map:Type) int | |
231 | download ( Vik:Map:Type *self, MapCoord *src, const gchar *dest_fn ) | |
232 | { | |
233 | const gchar *vers_str = google_version_number(src, GOOGLE_MAP_TYPE(self)->_priv->type); | |
234 | return(real_google_download ( src, dest_fn, vers_str )); | |
235 | } | |
236 | } |