[gxml] Set owned getter DomNonDocumentTypeChildNode.previous/next_element_sibling

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 8d391689b5b0d728fe8612e8735fca4c37c0bdad
Author: Yannick Inizan <inizan yannick gmail com>
Date:   Sat Sep 2 18:21:14 2017 -0500

    Set owned getter DomNonDocumentTypeChildNode.previous/next_element_sibling

 gxml/DomCollections.vala |    4 ++--
 gxml/GXmlChildNode.vala  |   26 ++++++++++++++++----------
 gxml/GomElement.vala     |   26 ++++++++++++++++----------
 gxml/GomText.vala        |   26 ++++++++++++++++----------
 4 files changed, 50 insertions(+), 32 deletions(-)
---
diff --git a/gxml/DomCollections.vala b/gxml/DomCollections.vala
index 84efb0e..ab16d06 100644
--- a/gxml/DomCollections.vala
+++ b/gxml/DomCollections.vala
@@ -58,8 +58,8 @@ public interface GXml.DomParentNode : GLib.Object {
 }
 
 public interface GXml.DomNonDocumentTypeChildNode : GLib.Object {
-  public abstract DomElement? previous_element_sibling { get; }
-  public abstract DomElement? next_element_sibling { get; }
+  public abstract DomElement? previous_element_sibling { owned get; }
+  public abstract DomElement? next_element_sibling { owned get; }
 }
 
 public interface GXml.DomChildNode : GLib.Object {
diff --git a/gxml/GXmlChildNode.vala b/gxml/GXmlChildNode.vala
index f2850fc..19de0e3 100644
--- a/gxml/GXmlChildNode.vala
+++ b/gxml/GXmlChildNode.vala
@@ -41,25 +41,31 @@ public class GXml.GNonDocumentChildNode : GXml.GChildNode,
 
   // DomNonDocumentTypeChildNode
   public DomElement? previous_element_sibling {
-    get {
+    owned get {
       if (parent_node != null) {
         var i = parent_node.child_nodes.index_of (this);
-        if (i == 0) return null;
-        var n = parent_node.child_nodes.item (i - 1);
-        if (n is DomElement) return (DomElement) n;
-        return null;
+        if (i == 0)
+          return null;
+        for (var j = i; j >= 1; j--) {
+          var n = parent_node.child_nodes.item (j - 1);
+          if (n is DomElement)
+                       return n as DomElement;
+        }
       }
       return null;
     }
   }
   public DomElement? next_element_sibling {
-    get {
+    owned get {
       if (parent_node != null) {
         var i = parent_node.child_nodes.index_of (this);
-        if (i == parent_node.child_nodes.length - 1) return null;
-        var n = parent_node.child_nodes.item (i + 1);
-        if (n is DomElement) return (DomElement) n;
-        return null;
+        if (i == parent_node.child_nodes.length - 1)
+          return null;
+        for (var j = i; j < parent_node.child_nodes.length - 1; j--) {
+          var n = parent_node.child_nodes.item (j + 1);
+          if (n is DomElement)
+            return (DomElement) n;
+        }
       }
       return null;
     }
diff --git a/gxml/GomElement.vala b/gxml/GomElement.vala
index 959ca79..ef2436d 100644
--- a/gxml/GomElement.vala
+++ b/gxml/GomElement.vala
@@ -220,25 +220,31 @@ public class GXml.GomElement : GomNode,
   }
   // DomNonDocumentTypeChildNode
   public DomElement? previous_element_sibling {
-    get {
+    owned get {
       if (parent_node != null) {
         var i = parent_node.child_nodes.index_of (this);
-        if (i == 0) return null;
-        var n = parent_node.child_nodes.item (i - 1);
-        if (n is DomElement) return (DomElement) n;
-        return null;
+        if (i == 0)
+          return null;
+        for (var j = i; j >= 1; j--) {
+          var n = parent_node.child_nodes.item (j - 1);
+          if (n is DomElement)
+                       return n as DomElement;
+        }
       }
       return null;
     }
   }
   public DomElement? next_element_sibling {
-    get {
+    owned get {
       if (parent_node != null) {
         var i = parent_node.child_nodes.index_of (this);
-        if (i == parent_node.child_nodes.length - 1) return null;
-        var n = parent_node.child_nodes.item (i + 1);
-        if (n is DomElement) return (DomElement) n;
-        return null;
+        if (i == parent_node.child_nodes.length - 1)
+          return null;
+        for (var j = i; j < parent_node.child_nodes.length - 1; j--) {
+          var n = parent_node.child_nodes.item (j + 1);
+          if (n is DomElement)
+            return (DomElement) n;
+        }
       }
       return null;
     }
diff --git a/gxml/GomText.vala b/gxml/GomText.vala
index ef21278..f5215fb 100644
--- a/gxml/GomText.vala
+++ b/gxml/GomText.vala
@@ -41,25 +41,31 @@ public class GXml.GomCharacterData : GomNode,
   }
   // DomNonDocumentTypeChildNode
   public DomElement? previous_element_sibling {
-    get {
+    owned get {
       if (parent_node != null) {
         var i = parent_node.child_nodes.index_of (this);
-        if (i == 0) return null;
-        var n = parent_node.child_nodes.item (i - 1);
-        if (n is DomElement) return (DomElement) n;
-        return null;
+        if (i == 0)
+          return null;
+        for (var j = i; j >= 1; j--) {
+          var n = parent_node.child_nodes.item (j - 1);
+          if (n is DomElement)
+                       return n as DomElement;
+        }
       }
       return null;
     }
   }
   public DomElement? next_element_sibling {
-    get {
+    owned get {
       if (parent_node != null) {
         var i = parent_node.child_nodes.index_of (this);
-        if (i == parent_node.child_nodes.length - 1) return null;
-        var n = parent_node.child_nodes.item (i + 1);
-        if (n is DomElement) return (DomElement) n;
-        return null;
+        if (i == parent_node.child_nodes.length - 1)
+          return null;
+        for (var j = i; j < parent_node.child_nodes.length - 1; j--) {
+          var n = parent_node.child_nodes.item (j + 1);
+          if (n is DomElement)
+            return (DomElement) n;
+        }
       }
       return null;
     }