From 2461f62440ea74536d7b31f2cc20cf4426dc1e37 Mon Sep 17 00:00:00 2001
From: Andrea Zagli <andrea.zagli@email.it>
Date: Tue, 18 Aug 2015 23:34:55 +0200
Subject: [PATCH] Added function ::get_extent.

---
 src/gtkmapserver.c   | 56 +++++++++++++++++++++++++++++++++++++++++++-
 src/gtkmapserver.h   | 10 ++++++++
 tests/gtkmapserver.c |  7 ++++++
 3 files changed, 72 insertions(+), 1 deletion(-)

diff --git a/src/gtkmapserver.c b/src/gtkmapserver.c
index a9b54c8..ec33bf4 100644
--- a/src/gtkmapserver.c
+++ b/src/gtkmapserver.c
@@ -116,6 +116,11 @@ gtk_mapserver_init (GtkMapserver *gtk_mapserver)
 	priv->sel_y_start = 0.0;
 }
 
+/**
+ * gtk_mapserver_new:
+ *
+ * Returns: the new created #GtkMapserver object.
+ */
 GtkWidget
 *gtk_mapserver_new ()
 {
@@ -188,6 +193,13 @@ GtkWidget
 	return gtk_mapserver;
 }
 
+/**
+ * gtk_mapserver_get_soup_message:
+ * @gtkm:
+ * @url:
+ *
+ * Returns:
+ */
 SoupMessage
 *gtk_mapserver_get_soup_message (GtkMapserver *gtkm,
 								 const gchar *url)
@@ -214,6 +226,11 @@ SoupMessage
 	return msg;
 }
 
+/**
+ * gtk_mapserver_set_home:
+ * @gtkm:
+ * @url:
+ */
 void
 gtk_mapserver_set_home (GtkMapserver *gtkm,
 						const gchar *url)
@@ -249,8 +266,9 @@ gtk_mapserver_set_home (GtkMapserver *gtkm,
 				{
 					gdk_pixbuf_loader_close (pxb_loader, NULL);
 				}
+
+			g_object_unref (msg);
 		}
-	g_object_unref (msg);
 	if (pxb_loader != NULL)
 		{
 			g_object_set (G_OBJECT (priv->img),
@@ -268,6 +286,42 @@ gtk_mapserver_set_home (GtkMapserver *gtkm,
 		}
 }
 
+/**
+ * gtk_mapserver_get_extent:
+ * @gtkm:
+ * @url:
+ *
+ * Returns: a #GtkMapserverExtent. Mapserver must returns an html page in the form "minx miny maxx maxy".
+ */
+GtkMapserverExtent
+*gtk_mapserver_get_extent (GtkMapserver *gtkm, const gchar *url)
+{
+	GtkMapserverExtent *ext;
+	SoupMessage *msg;
+
+	ext = NULL;
+
+	msg = gtk_mapserver_get_soup_message (gtkm, url);
+	if (msg != NULL)
+		{
+			gchar **coords;
+
+			ext = (GtkMapserverExtent *)g_new0 (GtkMapserverExtent, 1);
+
+			coords = g_strsplit (msg->response_body->data, " ", -1);
+			ext->minx = g_strtod (coords[0], NULL);
+			ext->miny = g_strtod (coords[1], NULL);
+			ext->maxx = g_strtod (coords[2], NULL);
+			ext->maxy = g_strtod (coords[3], NULL);
+
+			g_strfreev (coords);
+
+			g_object_unref (msg);
+		}
+
+	return ext;
+}
+
 /* PRIVATE */
 static void
 gtk_mapserver_set_property (GObject *object, guint property_id, const GValue *value, GParamSpec *pspec)
diff --git a/src/gtkmapserver.h b/src/gtkmapserver.h
index 4d73727..f5aa7db 100644
--- a/src/gtkmapserver.h
+++ b/src/gtkmapserver.h
@@ -66,6 +66,16 @@ SoupMessage *gtk_mapserver_get_soup_message (GtkMapserver *gtkm,
 
 void gtk_mapserver_set_home (GtkMapserver *gtkm, const gchar *url);
 
+typedef struct
+	{
+		gdouble minx;
+		gdouble miny;
+		gdouble maxx;
+		gdouble maxy;
+	} GtkMapserverExtent;
+
+GtkMapserverExtent *gtk_mapserver_get_extent (GtkMapserver *gtkm, const gchar *url);
+
 
 G_END_DECLS
 
diff --git a/tests/gtkmapserver.c b/tests/gtkmapserver.c
index b661d70..3ef61df 100644
--- a/tests/gtkmapserver.c
+++ b/tests/gtkmapserver.c
@@ -35,6 +35,7 @@ main (int argc, char **argv)
 {
 	GtkWidget *window;
 	GtkWidget *gtkmap;
+	GtkMapserverExtent *ext;
 
 	/* Initialize GTK+. */
 	gtk_init (&argc, &argv);
@@ -53,6 +54,12 @@ main (int argc, char **argv)
 
 	gtk_mapserver_set_home (GTK_MAPSERVER (gtkmap), "http://atlante/cgi-bin/mapserv?map=/var/www_mapper/www_pm4/config/cdu/RU_cdu.map&mode=map&layers=catasto");
 
+	ext = gtk_mapserver_get_extent (GTK_MAPSERVER (gtkmap), "http://atlante/cgi-bin/mapserv?map=/var/www_mapper/www_pm4/config/cdu/RU_cdu.map&mode=itemquery&qlayer=catasto&qstring=\"foglio\"='2' and \"part\"='22'&map.layer[catasto]=TEMPLATE \"shpext.html\"");
+	if (ext != NULL)
+		{
+			g_message ("Extent: %f %f %f %f", ext->minx, ext->miny, ext->maxx, ext->maxy);
+		}
+
 	/* Pass control to the GTK+ main event loop. */
 	gtk_main ();
 
-- 
2.49.0