X-Git-Url: https://git.street.me.uk/andy/viking.git/blobdiff_plain/c395c6a556c8451b1466783ee1dbcf21138385eb..99a3e19093de9408cb066670376edf8dcf98c294:/src/vikslippymapsource.c?ds=sidebyside diff --git a/src/vikslippymapsource.c b/src/vikslippymapsource.c index 99ef39ec..1c36cdc7 100644 --- a/src/vikslippymapsource.c +++ b/src/vikslippymapsource.c @@ -29,7 +29,10 @@ 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 int _download ( VikMapSource *self, MapCoord *src, const gchar *dest_fn ); +static int _download ( VikMapSource *self, MapCoord *src, const gchar *dest_fn, void *handle ); +static void * _download_handle_init ( VikMapSource *self); +static void _download_handle_cleanup ( VikMapSource *self, void *handle); +static gboolean _supports_if_modified_since (VikMapSource *self ); static gchar *_get_uri( VikSlippyMapSource *self, MapCoord *src ); static gchar *_get_hostname( VikSlippyMapSource *self ); @@ -54,6 +57,7 @@ enum PROP_URL, PROP_REFERER, PROP_FOLLOW_LOCATION, + PROP_CHECK_FILE_SERVER_TIME, }; G_DEFINE_TYPE_EXTENDED (VikSlippyMapSource, vik_slippy_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT, (GTypeFlags)0,); @@ -69,6 +73,7 @@ vik_slippy_map_source_init (VikSlippyMapSource *self) priv->options.referer = NULL; priv->options.follow_location = 0; priv->options.check_file = a_check_map_file; + priv->options.check_file_server_time = FALSE; g_object_set (G_OBJECT (self), "tilesize-x", 256, @@ -123,6 +128,10 @@ vik_slippy_map_source_set_property (GObject *object, 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; + default: /* We don't have any other property... */ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); @@ -157,6 +166,10 @@ vik_slippy_map_source_get_property (GObject *object, 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; + default: /* We don't have any other property... */ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); @@ -178,6 +191,9 @@ vik_slippy_map_source_class_init (VikSlippyMapSourceClass *klass) parent_class->coord_to_mapcoord = _coord_to_mapcoord; parent_class->mapcoord_to_center_coord = _mapcoord_to_center_coord; parent_class->download = _download; + parent_class->download_handle_init = _download_handle_init; + parent_class->download_handle_cleanup = _download_handle_cleanup; + parent_class->supports_if_modified_since = _supports_if_modified_since; /* Default implementation of methods */ klass->get_uri = _get_uri; @@ -213,6 +229,13 @@ vik_slippy_map_source_class_init (VikSlippyMapSourceClass *klass) 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); g_type_class_add_private (klass, sizeof (VikSlippyMapSourcePrivate)); @@ -227,13 +250,23 @@ static const gdouble scale_mpps[] = { GZ(0), GZ(1), GZ(2), GZ(3), GZ(4), GZ(5), static const gint num_scales = (sizeof(scale_mpps) / sizeof(scale_mpps[0])); +static const gdouble scale_neg_mpps[] = { 1.0/GZ(0), 1.0/GZ(1), 1.0/GZ(2), 1.0/GZ(3) }; +static const gint num_scales_neg = (sizeof(scale_neg_mpps) / sizeof(scale_neg_mpps[0])); + #define ERROR_MARGIN 0.01 -static guint8 slippy_zoom ( gdouble mpp ) { +static gint slippy_zoom ( gdouble mpp ) { gint i; for ( i = 0; i < num_scales; i++ ) { - if ( ABS(scale_mpps[i] - mpp) < ERROR_MARGIN ) + if ( ABS(scale_mpps[i] - mpp) < ERROR_MARGIN ) { return i; + } } + for ( i = 0; i < num_scales_neg; i++ ) { + if ( ABS(scale_neg_mpps[i] - mpp) < 0.000001 ) { + return -i; + } + } + return 255; } @@ -276,6 +309,15 @@ vik_slippy_map_source_get_download_options( VikSlippyMapSource *self ) return (*klass->get_download_options)(self); } +gboolean +_supports_if_modified_since (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; +} static gboolean _coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest ) { @@ -298,25 +340,42 @@ _coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xzoom, gdo static void _mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest ) { - gdouble socalled_mpp = GZ(src->scale); + gdouble socalled_mpp; + if (src->scale >= 0) + socalled_mpp = GZ(src->scale); + else + socalled_mpp = 1.0/GZ(-src->scale); dest->mode = VIK_COORD_LATLON; dest->east_west = ((src->x+0.5) / GZ(17) * socalled_mpp * 360) - 180; dest->north_south = DEMERCLAT(180 - ((src->y+0.5) / GZ(17) * socalled_mpp * 360)); } static int -_download ( VikMapSource *self, MapCoord *src, const gchar *dest_fn ) +_download ( VikMapSource *self, MapCoord *src, const gchar *dest_fn, void *handle ) { int res; gchar *uri = vik_slippy_map_source_get_uri(VIK_SLIPPY_MAP_SOURCE(self), src); gchar *host = vik_slippy_map_source_get_hostname(VIK_SLIPPY_MAP_SOURCE(self)); DownloadOptions *options = vik_slippy_map_source_get_download_options(VIK_SLIPPY_MAP_SOURCE(self)); - res = a_http_download_get_url ( host, uri, dest_fn, options ); + res = a_http_download_get_url ( host, uri, dest_fn, options, handle ); g_free ( uri ); g_free ( host ); return res; } +static void * +_download_handle_init ( VikMapSource *self ) +{ + return a_download_handle_init (); +} + + +static void +_download_handle_cleanup ( VikMapSource *self, void *handle ) +{ + return a_download_handle_cleanup ( handle ); +} + static gchar * _get_uri( VikSlippyMapSource *self, MapCoord *src ) {