[libchamplain] Add champlain_bounding_box_covers()

[Jiří Techet <jiritechet src gnome org>]

commit 2e2ccc34d92ad2ee71487e22565856149ee438be
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Tue Apr 16 18:59:18 2013 +0300

    Add champlain_bounding_box_covers()
    
    Add a method to check if a particular location is covered by a bounding
    box.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=698143

 champlain/champlain-bounding-box.c | 21 +++++++++++++++++++++
 champlain/champlain-bounding-box.h |  4 ++++
 2 files changed, 25 insertions(+)
---
diff --git a/champlain/champlain-bounding-box.c b/champlain/champlain-bounding-box.c
index e84e58b..50a6238 100644
--- a/champlain/champlain-bounding-box.c
+++ b/champlain/champlain-bounding-box.c
@@ -216,3 +216,24 @@ champlain_bounding_box_is_valid (ChamplainBoundingBox *bbox)
          (bbox->bottom > CHAMPLAIN_MIN_LATITUDE) && (bbox->bottom < CHAMPLAIN_MAX_LATITUDE) &&
          (bbox->top > CHAMPLAIN_MIN_LATITUDE) && (bbox->top < CHAMPLAIN_MAX_LATITUDE);
 }
+
+/**
+ * champlain_bounding_box_covers:
+ * @bbox: a #ChamplainBoundingBox
+ *
+ * Checks whether @bbox covers the given coordinates.
+ *
+ * Returns: TRUE when the bounding box covers given coordinates, FALSE otherwise.
+ *
+ * Since: 0.12
+ */
+gboolean
+champlain_bounding_box_covers(ChamplainBoundingBox *bbox,
+    gdouble latitude,
+    gdouble longitude)
+{
+  g_return_val_if_fail (CHAMPLAIN_BOUNDING_BOX (bbox), FALSE);
+
+  return ((latitude >= bbox->bottom && latitude <= bbox->top) &&
+          (longitude >= bbox->left && longitude <= bbox->right));
+}
diff --git a/champlain/champlain-bounding-box.h b/champlain/champlain-bounding-box.h
index 1e01a33..5ed3083 100644
--- a/champlain/champlain-bounding-box.h
+++ b/champlain/champlain-bounding-box.h
@@ -73,6 +73,10 @@ void champlain_bounding_box_extend (ChamplainBoundingBox *bbox,
 
 gboolean champlain_bounding_box_is_valid (ChamplainBoundingBox *bbox);
 
+gboolean champlain_bounding_box_covers(ChamplainBoundingBox *bbox,
+    gdouble latitude,
+    gdouble longitude);
+
 G_END_DECLS
 
 #endif