[andy/viking.git] / src / vikslippymapsource.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
/*
 * viking
 * Copyright (C) 2009, Guilhem Bonnefille <guilhem.bonnefille@gmail.com>
 * 
 * viking is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * viking is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 /**
  * SECTION:vikslippymapsource
  * @short_description: the class for SlippyMap oriented map sources
  * 
  * The #VikSlippyMapSource class handles slippy map oriented map sources.
  * The related service is tile oriented, à la Google.
  * 
  * The tiles are in 'google spherical mercator', which is
  * basically a mercator projection that assumes a spherical earth.
  * http://docs.openlayers.org/library/spherical_mercator.html
  * 
  * Such service is also a type of TMS (Tile Map Service) as defined in
  * OSGeo's wiki.
  * http://wiki.osgeo.org/wiki/Tile_Map_Service_Specification
  * But take care that the Y axis is inverted, ie the origin is at top-left
  * corner.
  * Following this specification, the protocol handled by this class
  * follows the global-mercator profile.
  * 
  * You can also find many interesting information on the OSM's wiki.
  * http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames
  * http://wiki.openstreetmap.org/wiki/Setting_up_TMS
  */
  
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef HAVE_MATH_H
#include <math.h>
#endif

#include "globals.h"
#include "vikslippymapsource.h"
#include "maputils.h"

static gboolean _coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest );
static void _mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest );

static gboolean _is_direct_file_access (VikMapSource *self );
static gboolean _supports_download_only_new (VikMapSource *self );

static gchar *_get_uri( VikMapSourceDefault *self, MapCoord *src );
static gchar *_get_hostname( VikMapSourceDefault *self );
static DownloadMapOptions *_get_download_options( VikMapSourceDefault *self );

typedef struct _VikSlippyMapSourcePrivate VikSlippyMapSourcePrivate;
struct _VikSlippyMapSourcePrivate
{
  gchar *hostname;
  gchar *url;
  DownloadMapOptions options;
  gboolean is_direct_file_access;
};

#define VIK_SLIPPY_MAP_SOURCE_PRIVATE(o)  (G_TYPE_INSTANCE_GET_PRIVATE ((o), VIK_TYPE_SLIPPY_MAP_SOURCE, VikSlippyMapSourcePrivate))

/* properties */
enum
{
  PROP_0,

  PROP_HOSTNAME,
  PROP_URL,
  PROP_REFERER,
  PROP_FOLLOW_LOCATION,
  PROP_CHECK_FILE_SERVER_TIME,
  PROP_USE_ETAG,
  PROP_IS_DIRECT_FILE_ACCESS,
};

G_DEFINE_TYPE (VikSlippyMapSource, vik_slippy_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT);

static void
vik_slippy_map_source_init (VikSlippyMapSource *self)
{
  /* initialize the object here */
  VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self);

  priv->hostname = NULL;
  priv->url = NULL;
  priv->options.referer = NULL;
  priv->options.follow_location = 0;
  priv->options.check_file = a_check_map_file;
  priv->options.check_file_server_time = FALSE;
  priv->options.use_etag = FALSE;
  priv->is_direct_file_access = FALSE;

  g_object_set (G_OBJECT (self),
                "tilesize-x", 256,
                "tilesize-y", 256,
                "drawmode", VIK_VIEWPORT_DRAWMODE_MERCATOR,
                NULL);
}

static void
vik_slippy_map_source_finalize (GObject *object)
{
  VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object);
  VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self);

  g_free (priv->hostname);
  priv->hostname = NULL;
  g_free (priv->url);
  priv->url = NULL;
  g_free (priv->options.referer);
  priv->options.referer = NULL;

  G_OBJECT_CLASS (vik_slippy_map_source_parent_class)->finalize (object);
}

static void
vik_slippy_map_source_set_property (GObject      *object,
                                    guint         property_id,
                                    const GValue *value,
                                    GParamSpec   *pspec)
{
  VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object);
  VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self);

  switch (property_id)
    {
    case PROP_HOSTNAME:
      g_free (priv->hostname);
      priv->hostname = g_value_dup_string (value);
      break;

    case PROP_URL:
      g_free (priv->url);
      priv->url = g_value_dup_string (value);
      break;

    case PROP_REFERER:
      g_free (priv->options.referer);
      priv->options.referer = g_value_dup_string (value);
      break;

    case PROP_FOLLOW_LOCATION:
      priv->options.follow_location = g_value_get_long (value);
      break;

    case PROP_CHECK_FILE_SERVER_TIME:
      priv->options.check_file_server_time = g_value_get_boolean (value);
      break;

    case PROP_USE_ETAG:
      priv->options.use_etag = g_value_get_boolean (value);
      break;

    case PROP_IS_DIRECT_FILE_ACCESS:
      priv->is_direct_file_access = g_value_get_boolean (value);
      break;

    default:
      /* We don't have any other property... */
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void
vik_slippy_map_source_get_property (GObject    *object,
                                    guint       property_id,
                                    GValue     *value,
                                    GParamSpec *pspec)
{
  VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object);
  VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self);

  switch (property_id)
    {
    case PROP_HOSTNAME:
      g_value_set_string (value, priv->hostname);
      break;

    case PROP_URL:
      g_value_set_string (value, priv->url);
      break;

    case PROP_REFERER:
      g_value_set_string (value, priv->options.referer);
      break;

    case PROP_FOLLOW_LOCATION:
      g_value_set_long (value, priv->options.follow_location);
      break;

    case PROP_CHECK_FILE_SERVER_TIME:
      g_value_set_boolean (value, priv->options.check_file_server_time);
      break;
	  
    case PROP_USE_ETAG:
      g_value_set_boolean (value, priv->options.use_etag);
      break;

    case PROP_IS_DIRECT_FILE_ACCESS:
      g_value_set_boolean (value, priv->is_direct_file_access);
      break;

    default:
      /* We don't have any other property... */
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void
vik_slippy_map_source_class_init (VikSlippyMapSourceClass *klass)
{
	GObjectClass* object_class = G_OBJECT_CLASS (klass);
	VikMapSourceClass* grandparent_class = VIK_MAP_SOURCE_CLASS (klass);
	VikMapSourceDefaultClass* parent_class = VIK_MAP_SOURCE_DEFAULT_CLASS (klass);
	GParamSpec *pspec = NULL;
		
	object_class->set_property = vik_slippy_map_source_set_property;
    object_class->get_property = vik_slippy_map_source_get_property;

	/* Overiding methods */
	grandparent_class->coord_to_mapcoord =        _coord_to_mapcoord;
	grandparent_class->mapcoord_to_center_coord = _mapcoord_to_center_coord;
	grandparent_class->is_direct_file_access = _is_direct_file_access;
	grandparent_class->supports_download_only_new = _supports_download_only_new;

	parent_class->get_uri = _get_uri;
	parent_class->get_hostname = _get_hostname;
	parent_class->get_download_options = _get_download_options;

	pspec = g_param_spec_string ("hostname",
	                             "Hostname",
	                             "The hostname of the map server",
	                             "<no-set>" /* default value */,
	                             G_PARAM_READWRITE);
	g_object_class_install_property (object_class, PROP_HOSTNAME, pspec);

	pspec = g_param_spec_string ("url",
	                             "URL",
	                             "The template of the tiles' URL",
	                             "<no-set>" /* default value */,
	                             G_PARAM_READWRITE);
	g_object_class_install_property (object_class, PROP_URL, pspec);

	pspec = g_param_spec_string ("referer",
	                             "Referer",
	                             "The REFERER string to use in HTTP request",
	                             NULL /* default value */,
	                             G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
	g_object_class_install_property (object_class, PROP_REFERER, pspec);
	
	pspec = g_param_spec_long ("follow-location",
	                           "Follow location",
                               "Specifies the number of retries to follow a redirect while downloading a page",
                               0  /* minimum value */,
                               G_MAXLONG /* maximum value */,
                               0  /* default value */,
                               G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
	g_object_class_install_property (object_class, PROP_FOLLOW_LOCATION, pspec);
	
	pspec = g_param_spec_boolean ("check-file-server-time",
	                              "Check file server time",
                                  "Age of current cache before redownloading tile",
                                  FALSE  /* default value */,
                                  G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
	g_object_class_install_property (object_class, PROP_CHECK_FILE_SERVER_TIME, pspec);

	pspec = g_param_spec_boolean ("use-etag",
	                              "Use etag values with server",
                                  "Store etag in a file, and send it to server to check if we have the latest file",
                                  FALSE  /* default value */,
                                  G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
	g_object_class_install_property (object_class, PROP_USE_ETAG, pspec);

	pspec = g_param_spec_boolean ("use-direct-file-access",
	                              "Use direct file access",
	                              "Use direct file access to OSM like tile images - no need for a webservice",
                                  FALSE  /* default value */,
                                  G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
	g_object_class_install_property (object_class, PROP_IS_DIRECT_FILE_ACCESS, pspec);

	g_type_class_add_private (klass, sizeof (VikSlippyMapSourcePrivate));
	
	object_class->finalize = vik_slippy_map_source_finalize;
}

static gboolean
_is_direct_file_access (VikMapSource *self)
{
  g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), FALSE);

  VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self);

  return priv->is_direct_file_access;
}

static gboolean
_supports_download_only_new (VikMapSource *self)
{
  g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), FALSE);
	
  VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self);
	
  return priv->options.check_file_server_time || priv->options.use_etag;
}

static gboolean
_coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest )
{
  g_assert ( src->mode == VIK_COORD_LATLON );

  if ( xzoom != yzoom )
    return FALSE;

  dest->scale = map_utils_mpp_to_scale ( xzoom );
  if ( dest->scale == 255 )
    return FALSE;

  dest->x = (src->east_west + 180) / 360 * VIK_GZ(17) / xzoom;
  dest->y = (180 - MERCLAT(src->north_south)) / 360 * VIK_GZ(17) / xzoom;
  dest->z = 0;

  return TRUE;
}

static void
_mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest )
{
  gdouble socalled_mpp;
  if (src->scale >= 0)
    socalled_mpp = VIK_GZ(src->scale);
  else
    socalled_mpp = 1.0/VIK_GZ(-src->scale);
  dest->mode = VIK_COORD_LATLON;
  dest->east_west = ((src->x+0.5) / VIK_GZ(17) * socalled_mpp * 360) - 180;
  dest->north_south = DEMERCLAT(180 - ((src->y+0.5) / VIK_GZ(17) * socalled_mpp * 360));
}

static gchar *
_get_uri( VikMapSourceDefault *self, MapCoord *src )
{
	g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL);
	
    VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self);
	gchar *uri = g_strdup_printf (priv->url, 17 - src->scale, src->x, src->y);
	return uri;
} 

static gchar *
_get_hostname( VikMapSourceDefault *self )
{
	g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL);
	
    VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self);
	return g_strdup( priv->hostname );
}

static DownloadMapOptions *
_get_download_options( VikMapSourceDefault *self )
{
	g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL);
	
	VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self);
	return &(priv->options);
}

VikSlippyMapSource *
vik_slippy_map_source_new_with_id (guint16 id, const gchar *label, const gchar *hostname, const gchar *url)
{
	return g_object_new(VIK_TYPE_SLIPPY_MAP_SOURCE,
	                    "id", id, "label", label, "hostname", hostname, "url", url, NULL);
}
Commit	Line	Data
e3a90009 GB	1	/* -- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -- */
	2	/*
	3	* viking
a482007a	4	* Copyright (C) 2009, Guilhem Bonnefille <guilhem.bonnefille@gmail.com>
e3a90009 GB	5	*
	6	* viking is free software: you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* viking is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	14	* See the GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along
	17	* with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
dfc4db8b GB	19
	20	/**
	21	* SECTION:vikslippymapsource
	22	* @short_description: the class for SlippyMap oriented map sources
	23	*
	24	* The #VikSlippyMapSource class handles slippy map oriented map sources.
	25	* The related service is tile oriented, à la Google.
	26	*
	27	* The tiles are in 'google spherical mercator', which is
	28	* basically a mercator projection that assumes a spherical earth.
	29	* http://docs.openlayers.org/library/spherical_mercator.html
	30	*
	31	* Such service is also a type of TMS (Tile Map Service) as defined in
	32	* OSGeo's wiki.
	33	* http://wiki.osgeo.org/wiki/Tile_Map_Service_Specification
	34	* But take care that the Y axis is inverted, ie the origin is at top-left
	35	* corner.
	36	* Following this specification, the protocol handled by this class
	37	* follows the global-mercator profile.
	38	*
	39	* You can also find many interesting information on the OSM's wiki.
	40	* http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames
	41	* http://wiki.openstreetmap.org/wiki/Setting_up_TMS
	42	*/
	43
e3a90009 GB	44	#ifdef HAVE_CONFIG_H
	45	#include "config.h"
	46	#endif
	47
	48	#ifdef HAVE_MATH_H
	49	#include <math.h>
	50	#endif
	51
	52	#include "globals.h"
8eb12ac6	53	#include "vikslippymapsource.h"
e1dde2a6	54	#include "maputils.h"
e3a90009 GB	55
	56	static gboolean _coord_to_mapcoord ( VikMapSource self, const VikCoord src, gdouble xzoom, gdouble yzoom, MapCoord *dest );
	57	static void _mapcoord_to_center_coord ( VikMapSource self, MapCoord src, VikCoord *dest );
f66ea3ec	58
2673b29d	59	static gboolean _is_direct_file_access (VikMapSource *self );
c81ded98	60	static gboolean _supports_download_only_new (VikMapSource *self );
e3a90009	61
f66ea3ec GB	62	static gchar _get_uri( VikMapSourceDefault self, MapCoord *src );
	63	static gchar _get_hostname( VikMapSourceDefault self );
	64	static DownloadMapOptions _get_download_options( VikMapSourceDefault self );
e3a90009	65
8eb12ac6 GB	66	typedef struct _VikSlippyMapSourcePrivate VikSlippyMapSourcePrivate;
	67	struct _VikSlippyMapSourcePrivate
	68	{
	69	gchar *hostname;
	70	gchar *url;
b529dc9c	71	DownloadMapOptions options;
2673b29d	72	gboolean is_direct_file_access;
8eb12ac6 GB	73	};
	74
	75	#define VIK_SLIPPY_MAP_SOURCE_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), VIK_TYPE_SLIPPY_MAP_SOURCE, VikSlippyMapSourcePrivate))
	76
4e53f3dc GB	77	/* properties */
	78	enum
	79	{
	80	PROP_0,
	81
	82	PROP_HOSTNAME,
	83	PROP_URL,
c395c6a5 GB	84	PROP_REFERER,
c395c6a5 GB	85	PROP_FOLLOW_LOCATION,
0f08bd0d	86	PROP_CHECK_FILE_SERVER_TIME,
05dbd9ba	87	PROP_USE_ETAG,
2673b29d	88	PROP_IS_DIRECT_FILE_ACCESS,
4e53f3dc GB	89	};
4e53f3dc GB	90
f6411015	91	G_DEFINE_TYPE (VikSlippyMapSource, vik_slippy_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT);
e3a90009 GB	92
e3a90009 GB	93	static void
3a84e537	94	vik_slippy_map_source_init (VikSlippyMapSource *self)
e3a90009	95	{
9cca9d93 GB	96	/* initialize the object here */
	97	VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self);
	98
	99	priv->hostname = NULL;
	100	priv->url = NULL;
c395c6a5 GB	101	priv->options.referer = NULL;
	102	priv->options.follow_location = 0;
	103	priv->options.check_file = a_check_map_file;
6693f5f9	104	priv->options.check_file_server_time = FALSE;
2673b29d RN	105	priv->options.use_etag = FALSE;
2673b29d RN	106	priv->is_direct_file_access = FALSE;
9cca9d93 GB	107
	108	g_object_set (G_OBJECT (self),
	109	"tilesize-x", 256,
	110	"tilesize-y", 256,
	111	"drawmode", VIK_VIEWPORT_DRAWMODE_MERCATOR,
	112	NULL);
e3a90009 GB	113	}
	114
	115	static void
8eb12ac6	116	vik_slippy_map_source_finalize (GObject *object)
e3a90009	117	{
9cca9d93 GB	118	VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object);
	119	VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self);
	120
	121	g_free (priv->hostname);
	122	priv->hostname = NULL;
	123	g_free (priv->url);
	124	priv->url = NULL;
c395c6a5 GB	125	g_free (priv->options.referer);
c395c6a5 GB	126	priv->options.referer = NULL;
e3a90009	127
9cca9d93	128	G_OBJECT_CLASS (vik_slippy_map_source_parent_class)->finalize (object);
e3a90009 GB	129	}
e3a90009 GB	130
4e53f3dc GB	131	static void
	132	vik_slippy_map_source_set_property (GObject *object,
	133	guint property_id,
	134	const GValue *value,
	135	GParamSpec *pspec)
	136	{
	137	VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object);
	138	VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self);
	139
	140	switch (property_id)
	141	{
	142	case PROP_HOSTNAME:
	143	g_free (priv->hostname);
	144	priv->hostname = g_value_dup_string (value);
	145	break;
	146
	147	case PROP_URL:
	148	g_free (priv->url);
	149	priv->url = g_value_dup_string (value);
	150	break;
	151
c395c6a5 GB	152	case PROP_REFERER:
	153	g_free (priv->options.referer);
	154	priv->options.referer = g_value_dup_string (value);
	155	break;
	156
	157	case PROP_FOLLOW_LOCATION:
	158	priv->options.follow_location = g_value_get_long (value);
	159	break;
	160
0f08bd0d	161	case PROP_CHECK_FILE_SERVER_TIME:
6693f5f9	162	priv->options.check_file_server_time = g_value_get_boolean (value);
0f08bd0d GB	163	break;
0f08bd0d GB	164
05dbd9ba JJ	165	case PROP_USE_ETAG:
	166	priv->options.use_etag = g_value_get_boolean (value);
	167	break;
	168
2673b29d RN	169	case PROP_IS_DIRECT_FILE_ACCESS:
	170	priv->is_direct_file_access = g_value_get_boolean (value);
	171	break;
	172
4e53f3dc GB	173	default:
	174	/* We don't have any other property... */
	175	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
	176	break;
	177	}
	178	}
	179
	180	static void
	181	vik_slippy_map_source_get_property (GObject *object,
	182	guint property_id,
	183	GValue *value,
	184	GParamSpec *pspec)
	185	{
	186	VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object);
	187	VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self);
	188
	189	switch (property_id)
	190	{
	191	case PROP_HOSTNAME:
	192	g_value_set_string (value, priv->hostname);
	193	break;
	194
	195	case PROP_URL:
	196	g_value_set_string (value, priv->url);
	197	break;
	198
c395c6a5 GB	199	case PROP_REFERER:
	200	g_value_set_string (value, priv->options.referer);
	201	break;
	202
	203	case PROP_FOLLOW_LOCATION:
	204	g_value_set_long (value, priv->options.follow_location);
	205	break;
	206
0f08bd0d	207	case PROP_CHECK_FILE_SERVER_TIME:
6693f5f9	208	g_value_set_boolean (value, priv->options.check_file_server_time);
0f08bd0d GB	209	break;
0f08bd0d GB	210
05dbd9ba JJ	211	case PROP_USE_ETAG:
	212	g_value_set_boolean (value, priv->options.use_etag);
	213	break;
	214
2673b29d RN	215	case PROP_IS_DIRECT_FILE_ACCESS:
	216	g_value_set_boolean (value, priv->is_direct_file_access);
	217	break;
	218
4e53f3dc GB	219	default:
	220	/* We don't have any other property... */
	221	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
	222	break;
	223	}
	224	}
	225
e3a90009	226	static void
8eb12ac6	227	vik_slippy_map_source_class_init (VikSlippyMapSourceClass *klass)
e3a90009 GB	228	{
e3a90009 GB	229	GObjectClass* object_class = G_OBJECT_CLASS (klass);
de674329	230	VikMapSourceClass* grandparent_class = VIK_MAP_SOURCE_CLASS (klass);
f66ea3ec	231	VikMapSourceDefaultClass* parent_class = VIK_MAP_SOURCE_DEFAULT_CLASS (klass);
4e53f3dc GB	232	GParamSpec *pspec = NULL;
	233
	234	object_class->set_property = vik_slippy_map_source_set_property;
	235	object_class->get_property = vik_slippy_map_source_get_property;
e3a90009 GB	236
e3a90009 GB	237	/* Overiding methods */
de674329 RN	238	grandparent_class->coord_to_mapcoord = _coord_to_mapcoord;
de674329 RN	239	grandparent_class->mapcoord_to_center_coord = _mapcoord_to_center_coord;
2673b29d	240	grandparent_class->is_direct_file_access = _is_direct_file_access;
de674329	241	grandparent_class->supports_download_only_new = _supports_download_only_new;
f66ea3ec GB	242
	243	parent_class->get_uri = _get_uri;
	244	parent_class->get_hostname = _get_hostname;
	245	parent_class->get_download_options = _get_download_options;
4e53f3dc GB	246
	247	pspec = g_param_spec_string ("hostname",
	248	"Hostname",
	249	"The hostname of the map server",
	250	"<no-set>" /* default value */,
9f58c4b4	251	G_PARAM_READWRITE);
4e53f3dc GB	252	g_object_class_install_property (object_class, PROP_HOSTNAME, pspec);
	253
	254	pspec = g_param_spec_string ("url",
	255	"URL",
	256	"The template of the tiles' URL",
	257	"<no-set>" /* default value */,
9f58c4b4	258	G_PARAM_READWRITE);
4e53f3dc	259	g_object_class_install_property (object_class, PROP_URL, pspec);
c395c6a5 GB	260
	261	pspec = g_param_spec_string ("referer",
	262	"Referer",
	263	"The REFERER string to use in HTTP request",
	264	NULL /* default value */,
	265	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_READWRITE);
	266	g_object_class_install_property (object_class, PROP_REFERER, pspec);
8eb12ac6	267
c395c6a5 GB	268	pspec = g_param_spec_long ("follow-location",
	269	"Follow location",
	270	"Specifies the number of retries to follow a redirect while downloading a page",
	271	0 /* minimum value */,
	272	G_MAXLONG /* maximum value */,
	273	0 /* default value */,
	274	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_READWRITE);
	275	g_object_class_install_property (object_class, PROP_FOLLOW_LOCATION, pspec);
0f08bd0d	276
6693f5f9 GB	277	pspec = g_param_spec_boolean ("check-file-server-time",
	278	"Check file server time",
	279	"Age of current cache before redownloading tile",
	280	FALSE /* default value */,
	281	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_READWRITE);
0f08bd0d	282	g_object_class_install_property (object_class, PROP_CHECK_FILE_SERVER_TIME, pspec);
c395c6a5	283
05dbd9ba JJ	284	pspec = g_param_spec_boolean ("use-etag",
	285	"Use etag values with server",
	286	"Store etag in a file, and send it to server to check if we have the latest file",
	287	FALSE /* default value */,
	288	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_READWRITE);
	289	g_object_class_install_property (object_class, PROP_USE_ETAG, pspec);
	290
2673b29d RN	291	pspec = g_param_spec_boolean ("use-direct-file-access",
	292	"Use direct file access",
	293	"Use direct file access to OSM like tile images - no need for a webservice",
	294	FALSE /* default value */,
	295	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_READWRITE);
	296	g_object_class_install_property (object_class, PROP_IS_DIRECT_FILE_ACCESS, pspec);
	297
8eb12ac6 GB	298	g_type_class_add_private (klass, sizeof (VikSlippyMapSourcePrivate));
	299
	300	object_class->finalize = vik_slippy_map_source_finalize;
e3a90009 GB	301	}
e3a90009 GB	302
cf65dac0	303	static gboolean
2673b29d RN	304	_is_direct_file_access (VikMapSource *self)
	305	{
	306	g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), FALSE);
	307
	308	VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self);
	309
	310	return priv->is_direct_file_access;
	311	}
	312
cf65dac0	313	static gboolean
c81ded98	314	_supports_download_only_new (VikMapSource *self)
0f08bd0d	315	{
c81ded98	316	g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), FALSE);
0f08bd0d	317
c81ded98	318	VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self);
0f08bd0d	319
c81ded98	320	return priv->options.check_file_server_time \|\| priv->options.use_etag;
0f08bd0d	321	}
f66ea3ec	322
e3a90009 GB	323	static gboolean
	324	_coord_to_mapcoord ( VikMapSource self, const VikCoord src, gdouble xzoom, gdouble yzoom, MapCoord *dest )
	325	{
	326	g_assert ( src->mode == VIK_COORD_LATLON );
	327
	328	if ( xzoom != yzoom )
	329	return FALSE;
	330
e1dde2a6	331	dest->scale = map_utils_mpp_to_scale ( xzoom );
e3a90009 GB	332	if ( dest->scale == 255 )
	333	return FALSE;
	334
e1dde2a6 RN	335	dest->x = (src->east_west + 180) / 360 * VIK_GZ(17) / xzoom;
e1dde2a6 RN	336	dest->y = (180 - MERCLAT(src->north_south)) / 360 * VIK_GZ(17) / xzoom;
e3a90009 GB	337	dest->z = 0;
	338
	339	return TRUE;
	340	}
	341
	342	static void
	343	_mapcoord_to_center_coord ( VikMapSource self, MapCoord src, VikCoord *dest )
	344	{
d1302dec JJ	345	gdouble socalled_mpp;
d1302dec JJ	346	if (src->scale >= 0)
e1dde2a6	347	socalled_mpp = VIK_GZ(src->scale);
d1302dec	348	else
e1dde2a6	349	socalled_mpp = 1.0/VIK_GZ(-src->scale);
e3a90009	350	dest->mode = VIK_COORD_LATLON;
e1dde2a6 RN	351	dest->east_west = ((src->x+0.5) / VIK_GZ(17) * socalled_mpp * 360) - 180;
e1dde2a6 RN	352	dest->north_south = DEMERCLAT(180 - ((src->y+0.5) / VIK_GZ(17) * socalled_mpp * 360));
e3a90009 GB	353	}
e3a90009 GB	354
8eb12ac6	355	static gchar *
f66ea3ec	356	_get_uri( VikMapSourceDefault self, MapCoord src )
8eb12ac6 GB	357	{
	358	g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL);
	359
	360	VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self);
	361	gchar *uri = g_strdup_printf (priv->url, 17 - src->scale, src->x, src->y);
	362	return uri;
	363	}
	364
	365	static gchar *
f66ea3ec	366	_get_hostname( VikMapSourceDefault *self )
8eb12ac6 GB	367	{
	368	g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL);
	369
	370	VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self);
	371	return g_strdup( priv->hostname );
	372	}
	373
b529dc9c	374	static DownloadMapOptions *
f66ea3ec	375	_get_download_options( VikMapSourceDefault *self )
8eb12ac6 GB	376	{
	377	g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL);
	378
c395c6a5 GB	379	VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self);
c395c6a5 GB	380	return &(priv->options);
8eb12ac6 GB	381	}
	382
	383	VikSlippyMapSource *
d7e495b2	384	vik_slippy_map_source_new_with_id (guint16 id, const gchar label, const gchar hostname, const gchar *url)
8eb12ac6	385	{
4e53f3dc	386	return g_object_new(VIK_TYPE_SLIPPY_MAP_SOURCE,
db03733a	387	"id", id, "label", label, "hostname", hostname, "url", url, NULL);
c395c6a5	388	}