[gxml] Remove secure casts and some doc warnings

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit f950e09db8437caa5ef282ed866c7abd9aa8f8b7
Author: Daniel Espinosa <esodan gmail com>
Date:   Thu Oct 10 13:22:46 2019 -0500

    Remove secure casts and some doc warnings

 gxml/CssSelectorParser.vala | 10 ++++------
 gxml/Element.vala           |  2 +-
 gxml/Property.vala          | 14 +++++++++-----
 test/ElementTest.vala       |  2 +-
 test/SerializationTest.vala |  2 +-
 5 files changed, 16 insertions(+), 14 deletions(-)
---
diff --git a/gxml/CssSelectorParser.vala b/gxml/CssSelectorParser.vala
index 9bd7d27..8b75afb 100644
--- a/gxml/CssSelectorParser.vala
+++ b/gxml/CssSelectorParser.vala
@@ -192,9 +192,8 @@ public class GXml.CssNotSelector : GXml.CssSelector {
        }
        
        /**
-        * a list of {@link GXml.CssSelector} that shouldn't match
-        * 
-        * @return a {@link Gee.List} of {@link GXml.CssSelector}
+        * a list of {@link GXml.CssSelector} that shouldn't match as a
+        * {@link Gee.List} of {@link GXml.CssSelector}
         */
        public Gee.List<GXml.CssSelector> selectors {
                get {
@@ -446,9 +445,8 @@ public class GXml.CssSelectorParser : GLib.Object {
                this.list = new Gee.ArrayList<GXml.CssSelector>();
        }
        /**
-        * a list of parsed {@link GXml.CssSelector} 
-        * 
-        * @return a {@link Gee.List} of {@link GXml.CssSelector} 
+        * a list of parsed {@link GXml.CssSelector}  as a
+        * {@link Gee.List} of {@link GXml.CssSelector}
         */
        public Gee.List<GXml.CssSelector> selectors {
                get {
diff --git a/gxml/Element.vala b/gxml/Element.vala
index 4ca3655..71d2d75 100644
--- a/gxml/Element.vala
+++ b/gxml/Element.vala
@@ -567,7 +567,7 @@ public class GXml.Element : GXml.Node,
         if (nspn != ((GXml.Attr) node).prefix
             && nsn != ((GXml.Attr) node).namespace_uri) {
           throw new DomError.NAMESPACE_ERROR
-                  (_("Trying to add an attribute with an undefined namespace's prefix: %s").printf ((node as 
GXml.Attr).prefix));
+                  (_("Trying to add an attribute with an undefined namespace's prefix: %s").printf 
(((GXml.Attr) node).prefix));
         }
         nspn = _element.lookup_prefix (((GXml.Attr) node).namespace_uri);
         nsn = _element.lookup_namespace_uri (nspn);
diff --git a/gxml/Property.vala b/gxml/Property.vala
index 7bffe36..dcb22a0 100644
--- a/gxml/Property.vala
+++ b/gxml/Property.vala
@@ -483,11 +483,13 @@ public class GXml.Date : GXml.BaseProperty {
  * Convenient class to handle {@link Element}'s attributes
  * using a {@link GLib.DateTime} as sources of values.
  *
- * Timestamp is considered in local time.
+ * Timestamp is considered in UTC time.
  *
  * Property is represented as a string using a {@link DateTime.format}
  * and {@link GLib.DateTime.format} method. If {@link DateTime.format}
  * is not set '%FT%T' format is used by default.
+ *
+ * For limitations on text parsing, see at {@link GLib.DateTime.DateTime.from_iso8601}
  */
 public class GXml.DateTime : GXml.BaseProperty {
   protected GLib.DateTime _value = null;
@@ -501,11 +503,13 @@ public class GXml.DateTime : GXml.BaseProperty {
       return _value.format (s);
     }
     set {
-      var tv = TimeVal ();
-      if (tv.from_iso8601 (value)) {
-        _value = new GLib.DateTime.from_timeval_local (tv);
-      } else
+      var tz = new TimeZone.utc ();
+      var dt = new GLib.DateTime.from_iso8601 (value, tz);
+      if (dt != null) {
+        _value = dt.add_days (0) ;
+      } else {
         warning (_("Invalid timestamp for property: "+value));
+      }
     }
   }
   /**
diff --git a/test/ElementTest.vala b/test/ElementTest.vala
index de2699a..8a51f3d 100644
--- a/test/ElementTest.vala
+++ b/test/ElementTest.vala
@@ -369,7 +369,7 @@ class GXml.ElementTest : GXmlTest  {
                                assert (elem.lookup_namespace_uri ("xtest") == "http://www.w3c.org/test";);
                                assert (n.lookup_namespace_uri ("xtest") == "http://www.w3c.org/test";);
                                assert (child.lookup_namespace_uri ("xtest") == "http://www.w3c.org/test";);
-                               message ((elem as GXml.Element).write_string ());
+                               message (((GXml.Element) elem).write_string ());
                                child.set_attribute_ns ("http://www.w3c.org/test","xtest:val","Value";);
                                assert (elem.get_attribute_ns ("http://www.w3.org/2000/xmlns/","xtest";) == 
"http://www.w3c.org/test";);
                                assert (elem.get_attribute_ns ("http://www.w3.org/2000/xmlns","xtest";) == 
"http://www.w3c.org/test";);
diff --git a/test/SerializationTest.vala b/test/SerializationTest.vala
index ad11df4..b7c0452 100644
--- a/test/SerializationTest.vala
+++ b/test/SerializationTest.vala
@@ -689,7 +689,7 @@ class SerializationTest : GXmlTest  {
       assert (t.timestamp != null);
       assert (t.timestamp.value != null);
       assert (t.timestamp.value == "2017-02-10T14:14:20");
-      t.timestamp.value = "2023-3-10T15:23:10.356";
+      t.timestamp.value = "2023-03-10T15:23:10.356";
       assert (t.timestamp.value != null);
       assert (t.timestamp.value == "2023-03-10T15:23:10");
       string s2 = t.to_string ();