private void ShowXNode(XNode xnode, TreeViewItemXNode parentNode, int position = -1)
{
var newItem = new TreeViewItemXNode();
newItem.XNode = xnode;
if (typeof(XComment).IsAssignableFrom(xnode.GetType())) {
var comment = (XComment)xnode;
newItem.Header = comment.Value;
} else if (typeof(XElement).IsAssignableFrom(xnode.GetType())) {
var element = (XElement)xnode;
//TreeViewItem to close opening tag.
newItem.EndingItem = new TreeViewItemXNode();
newItem.EndingItem.XNode = element;
newItem.EndingItem.BeginItem = newItem;
newItem.EndingItem.Header = "</" + element.Name + ">";
if (element.HasElements) {
var elementsEnumerator = element.Nodes().GetEnumerator();
while (elementsEnumerator.MoveNext()) {
this.ShowXNode(elementsEnumerator.Current, newItem);
}
} else if (element.Value.Length > 0) {
//TreeViewItem to show element value.
//When an XElement has a value, it has an XText node, which is in the first position.
newItem.ValueItem = new TreeViewItemXNode();
newItem.ValueItem.BeginItem = newItem;
newItem.ValueItem.XNode = element.FirstNode;
newItem.ValueItem.Header = element.Value;
newItem.Items.Add(newItem.ValueItem);
}
if (newItem.ValueItem == null) {
//Create an XNode to hold the element's value.
var text = new XText("");
element.AddFirst(text);
//TreeViewItem to show element value.
newItem.ValueItem = new TreeViewItemXNode();
newItem.ValueItem.BeginItem = newItem;
newItem.ValueItem.XNode = text;
newItem.ValueItem.Header = "";
}
this.RefreshXElementItemHeader(newItem);
} else if (typeof(XText).IsAssignableFrom(xnode.GetType())) {
var text = (XText)xnode;
newItem.BeginItem = parentNode;
newItem.Header = text.Value;
parentNode.ValueItem = newItem;
} else {
newItem.Header = "UNKNOWN XNODE!!!";
}
if (parentNode == null)
tvXmlDocument.Items.Add(newItem);
else {
if (position == -1)
parentNode.Items.Add(newItem);
else
parentNode.Items.Insert(position, newItem);
}
if (newItem.HasItems) {
newItem.Collapsed += new RoutedEventHandler(ItemCollapsed);
newItem.Expanded += new RoutedEventHandler(ItemExpanded);
}
}
private void tvXmlDocument_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
var selectedItem = (TreeViewItemXNode)tvXmlDocument.SelectedItem;
txNodeName.TextChanged -= new TextChangedEventHandler(txNodeName_TextChanged);
txNodeName.GotFocus -= new RoutedEventHandler(txNodeName_GotFocus);
txNodeValue.TextChanged -= new TextChangedEventHandler(txNodeValue_TextChanged);
if (selectedItem == null) {
grdNodeDetails.Visibility = Visibility.Hidden;
mSelectedItem = null;
mSelectedXNode = null;
} else {
grdNodeDetails.Visibility = Visibility.Visible;
/*if (selectedItem.EndingItem != null || (selectedItem.BeginItem == null && selectedItem.EndingItem == null)) {
//This is item is an XElement because it either:
// has ending item, which only XElement items can have; OR
// doesn't have either a begin item or an end item, which only XElement items cannot have both.
//Do nothing, just let execution fall through.
} else*/ if (selectedItem.BeginItem != null) {
//The real item is the one at the beginning.
selectedItem = selectedItem.BeginItem;
}
if (selectedItem != mSelectedItem) {
//Selected item is different from the previously selected one.
mSelectedItem = selectedItem;
mSelectedXNode = mSelectedItem.XNode;
mAttributeRows.Clear();
grdAttributes.Children.Clear();
grdAttributes.RowDefinitions.Clear();
if (typeof(XComment).IsAssignableFrom(mSelectedXNode.GetType())) {
//User selected a comment. Only its value can be changed.
var comment = (XComment)mSelectedXNode;
lbNodeType.Text = "This is a comment node. Only its value can be changed.";
grpAttributes.Visibility = Visibility.Hidden;
txNodeValue.Text = comment.Value;
txNodeName.IsEnabled = false;
txNodeName.Text = "Comment Node";
txNodeName.TextChanged -= new TextChangedEventHandler(txNodeName_TextChanged);
txNodeName.GotFocus -= new RoutedEventHandler(txNodeName_GotFocus);
txNodeValue.TextChanged += new TextChangedEventHandler(txNodeValue_TextChanged);
} else if (typeof(XElement).IsAssignableFrom(mSelectedXNode.GetType())) {
var element = (XElement)mSelectedXNode;
XAttributeGridRow newRow;
lbNodeType.Text = "This is a normal node. You can change its name, value, and attributes.";
txNodeName.IsEnabled = true;
txNodeName.Text = element.Name.LocalName;
txNodeValue.Text = (string)mSelectedItem.ValueItem.Header;
grpAttributes.Visibility = Visibility.Visible;
if (element.HasAttributes) {
using (var attributesEnumerator = element.Attributes().GetEnumerator()) {
while (attributesEnumerator.MoveNext()) {
newRow = new XAttributeGridRow();
newRow.XAttribute = attributesEnumerator.Current;
newRow.AddToGrid(grdAttributes);
newRow.XAttributeValueChanged += new EventHandler(this.XAttribute_ValueChanged);
mAttributeRows.Add(newRow);
}
}
}
txNodeName.TextChanged += new TextChangedEventHandler(txNodeName_TextChanged);
txNodeName.GotFocus += new RoutedEventHandler(txNodeName_GotFocus);
txNodeValue.TextChanged += new TextChangedEventHandler(txNodeValue_TextChanged);
}
} else if (typeof(XComment).IsAssignableFrom(mSelectedXNode.GetType())) {
txNodeName.TextChanged -= new TextChangedEventHandler(txNodeName_TextChanged);
txNodeName.GotFocus -= new RoutedEventHandler(txNodeName_GotFocus);
txNodeValue.TextChanged += new TextChangedEventHandler(txNodeValue_TextChanged);
} else if (typeof(XElement).IsAssignableFrom(mSelectedXNode.GetType())) {
txNodeName.TextChanged += new TextChangedEventHandler(txNodeName_TextChanged);
txNodeName.GotFocus += new RoutedEventHandler(txNodeName_GotFocus);
txNodeValue.TextChanged += new TextChangedEventHandler(txNodeValue_TextChanged);
}
}
}
private void RefreshXElementItemHeader(TreeViewItemXNode item)
{
var element = (XElement)item.XNode;
var newItemHeader = "<" + element.Name;
if (element.HasAttributes) {
using (var attEnumerator = element.Attributes().GetEnumerator()) {
while (attEnumerator.MoveNext()) {
newItemHeader += " " + attEnumerator.Current.Name + "=" + attEnumerator.Current.Value;
}
}
}
if (!item.HasItems)
newItemHeader += "/";
item.Header = newItemHeader + ">";
}
