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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/*
* GData Client
* Copyright (C) Philip Withnall 2009 <philip@tecnocode.co.uk>
* Copyright (C) Richard Schwarting 2009 <aquarichy@gmail.com>
*
* GData Client is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* GData Client 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with GData Client. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* SECTION:gdata-georss-where
* @short_description: GeoRSS where element
* @stability: Stable
* @include: gdata/georss/gdata-georss-where.h
*
* #GDataGeoRSSWhere represents a "where" element from the
* <ulink type="http" url="http://www.georss.org/georss">GeoRSS specification</ulink>.
* with PicasaWeb usage defined at
* <ulink type="http" url="http://code.google.com/apis/picasaweb/docs/2.0/reference.html#georss_reference">PicasaWeb API reference</ulink>.
*
* It is private API, since implementing classes are likely to proxy the properties and functions
* of #GDataGeoRSSWhere as appropriate; most entry types which implement #GDataGeoRSSWhere have no use
* for most of its properties, and it would be unnecessary and confusing to expose #GDataGeoRSSWhere itself.
*
* Since: 0.5.0
*/
#include <glib.h>
#include <libxml/parser.h>
#include <string.h>
#include "gdata-georss-where.h"
#include "gdata-parsable.h"
#include "gdata-parser.h"
#include "gdata-private.h"
static gboolean parse_xml (GDataParsable *parsable, xmlDoc *doc, xmlNode *node, gpointer user_data, GError **error);
static void get_namespaces (GDataParsable *parsable, GHashTable *namespaces);
static void get_xml (GDataParsable *parsable, GString *xml_string);
struct _GDataGeoRSSWherePrivate {
gdouble latitude;
gdouble longitude;
};
G_DEFINE_TYPE (GDataGeoRSSWhere, gdata_georss_where, GDATA_TYPE_PARSABLE)
static void
gdata_georss_where_class_init (GDataGeoRSSWhereClass *klass)
{
GDataParsableClass *parsable_class = GDATA_PARSABLE_CLASS (klass);
g_type_class_add_private (klass, sizeof (GDataGeoRSSWherePrivate));
parsable_class->get_xml = get_xml;
parsable_class->parse_xml = parse_xml;
parsable_class->get_namespaces = get_namespaces;
parsable_class->element_name = "where";
parsable_class->element_namespace = "georss";
}
static void
gdata_georss_where_init (GDataGeoRSSWhere *self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, GDATA_TYPE_GEORSS_WHERE, GDataGeoRSSWherePrivate);
self->priv->latitude = G_MAXDOUBLE;
self->priv->longitude = G_MAXDOUBLE;
}
static gboolean
parse_xml (GDataParsable *parsable, xmlDoc *doc, xmlNode *node, gpointer user_data, GError **error)
{
GDataGeoRSSWhere *self = GDATA_GEORSS_WHERE (parsable);
if (gdata_parser_is_namespace (node, "http://www.opengis.net/gml") == TRUE &&
xmlStrcmp (node->name, (xmlChar*) "Point") == 0) {
/* gml:Point */
gboolean found_pos = FALSE;
xmlNode *child;
for (child = node->children; child != NULL; child = child->next) {
if (xmlStrcmp (child->name, (xmlChar*) "pos") == 0) {
xmlChar *pos = xmlNodeListGetString (doc, child->children, TRUE);
gchar *endptr;
self->priv->latitude = g_ascii_strtod ((gchar*) pos, &endptr);
self->priv->longitude = g_ascii_strtod (endptr, NULL);
xmlFree (pos);
found_pos = TRUE;
} else {
/* TODO: this logic copied from gdata-parsable.c. Re-evaluate this at some point in the future.
If GeoRSS and GML support were to be used more widely, it might due to implement GML objects. */
xmlBuffer *buffer;
/* Unhandled XML */
buffer = xmlBufferCreate ();
xmlNodeDump (buffer, doc, child, 0, 0);
g_debug ("Unhandled XML in <gml:Point>: %s", (gchar*) xmlBufferContent (buffer));
xmlBufferFree (buffer);
}
}
if (found_pos == FALSE)
return gdata_parser_error_required_element_missing ("pos", "gml:Point", error);
return TRUE;
}
return GDATA_PARSABLE_CLASS (gdata_georss_where_parent_class)->parse_xml (parsable, doc, node, user_data, error);
}
static void
get_xml (GDataParsable *parsable, GString *xml_string)
{
GDataGeoRSSWherePrivate *priv = GDATA_GEORSS_WHERE (parsable)->priv;
gchar latitude_str[G_ASCII_DTOSTR_BUF_SIZE];
gchar longitude_str[G_ASCII_DTOSTR_BUF_SIZE];
if (priv->latitude != G_MAXDOUBLE && priv->longitude != G_MAXDOUBLE) {
g_string_append_printf (xml_string, "<gml:Point><gml:pos>%s %s</gml:pos></gml:Point>",
g_ascii_dtostr (latitude_str, sizeof (latitude_str), priv->latitude),
g_ascii_dtostr (longitude_str, sizeof (longitude_str), priv->longitude));
}
}
static void
get_namespaces (GDataParsable *parsable, GHashTable *namespaces)
{
g_hash_table_insert (namespaces, (gchar*) "georss", (gchar*) "http://www.georss.org/georss");
g_hash_table_insert (namespaces, (gchar*) "gml", (gchar*) "http://www.opengis.net/gml");
}
/**
* gdata_georss_where_get_latitude:
* @self: a #GDataGeoRSSWhere
*
* Gets the #GDataGeoRSSWhere:latitude property.
*
* Return value: the latitude of this position, or %G_MAXDOUBLE if unknown
*
* Since: 0.5.0
*/
gdouble
gdata_georss_where_get_latitude (GDataGeoRSSWhere *self)
{
g_return_val_if_fail (GDATA_IS_GEORSS_WHERE (self), G_MAXDOUBLE);
return self->priv->latitude;
}
/**
* gdata_georss_where_get_longitude:
* @self: a #GDataGeoRSSWhere
*
* Gets the #GDataGeoRSSWhere:longitude property.
*
* Return value: the longitude of this position, or %G_MAXDOUBLE if unknown
*
* Since: 0.5.0
*/
gdouble
gdata_georss_where_get_longitude (GDataGeoRSSWhere *self)
{
g_return_val_if_fail (GDATA_IS_GEORSS_WHERE (self), G_MAXDOUBLE);
return self->priv->longitude;
}
/**
* gdata_georss_where_set_latitude:
* @self: a #GDataGeoRSSWhere
* @latitude: the new latitude coordinate, or %G_MAXDOUBLE
*
* Sets the #GDataGeoRSSWhere:latitude property to @latitude.
*
* Valid values range from <code class="literal">-90.0</code> to <code class="literal">90.0</code> inclusive.
* Set @latitude to %G_MAXDOUBLE to unset it.
*
* Since: 0.5.0
*/
void
gdata_georss_where_set_latitude (GDataGeoRSSWhere *self, gdouble latitude)
{
g_return_if_fail (GDATA_IS_GEORSS_WHERE (self));
if (latitude < -90.0 || latitude > 90.0)
self->priv->latitude = G_MAXDOUBLE;
else
self->priv->latitude = latitude;
}
/**
* gdata_georss_where_set_longitude:
* @self: a #GDataGeoRSSWhere
* @longitude: the new longitude coordinate, or %G_MAXDOUBLE
*
* Sets the #GDataGeoRSSWhere:longitude property to @longitude.
*
* Valid values range from <code class="literal">-180.0</code> to <code class="literal">180.0</code> inclusive.
* Set @longitude to %G_MAXDOUBLE to unset it.
*
* Since: 0.5.0
*/
void
gdata_georss_where_set_longitude (GDataGeoRSSWhere *self, gdouble longitude)
{
g_return_if_fail (GDATA_IS_GEORSS_WHERE (self));
if (longitude < -180.0 || longitude > 180.0)
self->priv->longitude = G_MAXDOUBLE;
else
self->priv->longitude = longitude;
}
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