Implements new properties and methods

GDataXML-HTML/lib/GDataXMLNode.h

@@ -139,6 +139,10 @@ typedef NSUInteger GDataXMLNodeKind;
 - (NSArray *)children;
 - (GDataXMLNode *)childAtIndex:(unsigned)index;
 
+- (GDataXMLNode *)parent;
+
+- (NSUInteger)index;
+
 - (NSString *)localName;
 - (NSString *)name;
 - (NSString *)prefix;
@@ -185,6 +189,7 @@ typedef NSUInteger GDataXMLNodeKind;
 // addChild adds a copy of the child node to the element
 - (void)addChild:(GDataXMLNode *)child;
 - (void)removeChild:(GDataXMLNode *)child;
+- (void)removeChildAtIndex:(NSUInteger)index;
 
 - (NSArray *)elementsForName:(NSString *)name;
 - (NSArray *)elementsForLocalName:(NSString *)localName URI:(NSString *)URI;
@@ -193,6 +198,7 @@ typedef NSUInteger GDataXMLNodeKind;
 - (GDataXMLNode *)attributeForName:(NSString *)name;
 - (GDataXMLNode *)attributeForLocalName:(NSString *)name URI:(NSString *)attributeURI;
 - (void)addAttribute:(GDataXMLNode *)attribute;
+- (void)removeAttributeForName:(NSString *)name;
 
 - (NSString *)resolvePrefixForNamespaceURI:(NSString *)namespaceURI;
 

GDataXML-HTML/lib/GDataXMLNode.m

@@ -375,6 +375,68 @@ - (NSString *)stringFromXMLString:(const xmlChar *)chars {
     return result;
 }
 
+/**
+ * Removes and free's the given attribute from its parent node.
+ * The attribute's surrounding prev/next pointers are properly updated to remove the attribute from the attr list.
+ **/
++ (void)removeAttribute:(xmlAttrPtr)attr
+{
+	// We perform a bit of optimization here.
+	// No need to bother nullifying pointers since we're about to free the node anyway.
+	[self detachAttribute:attr andClean:NO];
+
+	xmlFreeProp(attr);
+}
+
+/**
+ * Detaches the given attribute from its parent node.
+ * The attribute's surrounding prev/next pointers are properly updated to remove the attribute from the attr list.
+ * Then, if the clean flag is YES, the attribute's parent, prev, next and doc pointers are set to null.
+ **/
++ (void)detachAttribute:(xmlAttrPtr)attr andClean:(BOOL)clean
+{
+	xmlNodePtr parent = attr->parent;
+
+	// Update the surrounding prev/next pointers
+	if (attr->prev == NULL)
+	{
+        parent->properties = attr->next;
+        if (attr->next != NULL) {
+            attr->next->prev = NULL;
+        }
+	}
+	else
+	{
+		attr->prev->next = attr->next;
+        if (attr->next != NULL) {
+            attr->next->prev = attr->prev;
+        }
+	}
+
+	if (clean)
+	{
+		// Nullify pointers
+		attr->parent = NULL;
+		attr->prev   = NULL;
+		attr->next   = NULL;
+		attr->ns     = NULL;
+		if (attr->doc != NULL) [self stripDocPointersFromAttr:attr];
+	}
+}
+
++ (void)stripDocPointersFromAttr:(xmlAttrPtr)attr
+{
+	xmlNodePtr child = attr->children;
+	while (child != NULL)
+	{
+		child->doc = NULL;
+		child = child->next;
+	}
+
+	attr->doc = NULL;
+}
+
+
 - (void)dealloc {
 
     if (xmlNode_ && shouldFreeXMLNode_) {
@@ -652,6 +714,27 @@ - (GDataXMLNode *)childAtIndex:(unsigned)index {
     return nil;
 }
 
+- (GDataXMLNode *)parent {
+    xmlNodePtr node = xmlNode_;
+
+    if (node->parent == NULL)
+        return nil;
+    else
+        return [GDataXMLNode nodeBorrowingXMLNode:node->parent];
+}
+
+- (NSUInteger)index {
+    NSUInteger result = 0;
+    xmlNodePtr node = xmlNode_->prev;
+    while (node != NULL)
+    {
+        result++;
+        node = node->prev;
+    }
+
+    return result;
+}
+
 - (GDataXMLNodeKind)kind {
     if (xmlNode_ != NULL) {
         xmlElementType nodeType = xmlNode_->type;
@@ -1115,6 +1198,11 @@ - (void)removeChild:(GDataXMLNode *)child {
     }
 }
 
+- (void)removeChildAtIndex:(NSUInteger)index
+{
+    [self removeChild:[self childAtIndex:index]];
+}
+
 - (NSArray *)elementsForName:(NSString *)name {
 
     NSString *desiredName = name;
@@ -1326,6 +1414,26 @@ - (void)addAttribute:(GDataXMLNode *)attribute {
     }
 }
 
+- (void)removeAttributeForName:(NSString *)name {
+	// This is a private/internal method
+
+	xmlAttrPtr attr = (xmlNode_)->properties;
+	if (attr)
+	{
+		const xmlChar *xmlName = (const xmlChar *)[name UTF8String];;
+		do
+		{
+			if (xmlStrEqual(attr->name, xmlName))
+			{
+				[GDataXMLNode removeAttribute:attr];
+				return;
+			}
+			attr = attr->next;
+
+		} while(attr);
+	}
+}
+
 - (GDataXMLNode *)attributeForXMLNode:(xmlAttrPtr)theXMLNode {
     // search the cached attributes list for the GDataXMLNode with
     // the underlying xmlAttrPtr
@@ -1981,4 +2089,3 @@ static CFHashCode StringCacheKeyHashCallBack(const void *str) {
     }
     return hash;
 }
-