src/googlerouting.c

   1 /*
   2  * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
   3  *
   4  * Copyright (C) 2005-2008, Alex Foobarian <foobarian@gmail.com>
   5  * Copyright (C) 2012-2013, 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
  23 /**
  24  * SECTION:googlerouting
  25  * @short_description: the class for Google Directions
  26  *
  27  * The #GoogleRouting class handles Google Directions
  28  * service as routing engine.
  29  *
  30  * Technical details are available here:
  31  * https://developers.google.com/maps/documentation/directions/#DirectionsResponses
  32  *
  33  * gpsbabel supports this format.
  34  */
  35
  36 #ifdef HAVE_CONFIG_H
  37 #include "config.h"
  38 #endif
  39
  40 #include <string.h>
  41
  42 #include <glib.h>
  43 #include <glib/gstdio.h>
  44
  45 #include "googlerouting.h"
  46
  47 #define GOOGLE_DIRECTIONS_STRING "maps.google.com/maps?q=from:%s,%s+to:%s,%s&output=js"
  48
  49 static DownloadMapOptions googles_routing_options = { FALSE, FALSE, "http://maps.google.com/", 0, NULL };
  50
  51 static gchar *google_routing_get_url_for_coords ( VikRoutingEngine *self, struct LatLon start, struct LatLon end );
  52 static DownloadMapOptions *google_routing_get_download_options ( VikRoutingEngine *self );
  53
  54 G_DEFINE_TYPE (GoogleRouting, google_routing, VIK_ROUTING_ENGINE_TYPE)
  55
  56 static void google_routing_class_init ( GoogleRoutingClass *klass )
  57 {
  58   GObjectClass *object_class;
  59   VikRoutingEngineClass *parent_class;
  60
  61   object_class = G_OBJECT_CLASS (klass);
  62
  63   parent_class = VIK_ROUTING_ENGINE_CLASS (klass);
  64
  65   parent_class->get_url_for_coords = google_routing_get_url_for_coords;
  66   parent_class->get_download_options = google_routing_get_download_options;
  67 }
  68
  69 /**
  70  * google_routing_new:
  71  *
  72  * Create a new instance of GoogleRouting routing engine.
  73  */
  74 GoogleRouting *google_routing_new ()
  75 {
  76   return GOOGLE_ROUTING ( g_object_new ( GOOGLE_ROUTING_TYPE,
  77                                          "id", "google",
  78                                          "label", "Google",
  79                                          "format", "google",
  80                                          NULL ) );
  81 }
  82
  83 static void google_routing_init ( GoogleRouting *vlp )
  84 {
  85 }
  86
  87 static DownloadMapOptions *
  88 google_routing_get_download_options ( VikRoutingEngine *self )
  89 {
  90         return &googles_routing_options;
  91 }
  92
  93 /*
  94  * Override VikRoutingEngine:get_download_options()
  95  */
  96 gchar *
  97 google_routing_get_url_for_coords ( VikRoutingEngine *self, struct LatLon start, struct LatLon end )
  98 {
  99     gchar startlat[G_ASCII_DTOSTR_BUF_SIZE], startlon[G_ASCII_DTOSTR_BUF_SIZE];
 100     gchar endlat[G_ASCII_DTOSTR_BUF_SIZE], endlon[G_ASCII_DTOSTR_BUF_SIZE];
 101     gchar *url;
 102     url = g_strdup_printf(GOOGLE_DIRECTIONS_STRING,
 103                           g_ascii_dtostr (startlat, G_ASCII_DTOSTR_BUF_SIZE, (gdouble) start.lat),
 104                           g_ascii_dtostr (startlon, G_ASCII_DTOSTR_BUF_SIZE, (gdouble) start.lon),
 105                           g_ascii_dtostr (endlat, G_ASCII_DTOSTR_BUF_SIZE, (gdouble) end.lat),
 106                           g_ascii_dtostr (endlon, G_ASCII_DTOSTR_BUF_SIZE, (gdouble) end.lon));
 107
 108     return url;
 109 }