/mcs/class/System.Xml.Linq/System.Xml.Linq/XContainer.cs
C# | 235 lines | 180 code | 28 blank | 27 comment | 39 complexity | d95b0f2fe13572b4ab23d6fbc58778b0 MD5 | raw file
Possible License(s): Unlicense, Apache-2.0, LGPL-2.0, MPL-2.0-no-copyleft-exception, CC-BY-SA-3.0, GPL-2.0
- //
- // Authors:
- // Atsushi Enomoto
- //
- // Copyright 2007 Novell (http://www.novell.com)
- //
- // Permission is hereby granted, free of charge, to any person obtaining
- // a copy of this software and associated documentation files (the
- // "Software"), to deal in the Software without restriction, including
- // without limitation the rights to use, copy, modify, merge, publish,
- // distribute, sublicense, and/or sell copies of the Software, and to
- // permit persons to whom the Software is furnished to do so, subject to
- // the following conditions:
- //
- // The above copyright notice and this permission notice shall be
- // included in all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- //
- using System;
- using System.Collections;
- using System.Collections.Generic;
- using System.IO;
- using System.Text;
- using System.Xml;
- namespace System.Xml.Linq
- {
- public abstract class XContainer : XNode
- {
- internal XContainer ()
- {
- }
- XNode first;
- XNode last;
- public XNode FirstNode {
- get { return first; }
- internal set { first = value; }
- }
- public XNode LastNode {
- get { return last; }
- internal set { last = value; }
- }
- void CheckChildType (object o, bool addFirst)
- {
- if (o == null || o is string || o is XNode)
- return;
- if (o is IEnumerable) {
- foreach (object oc in ((IEnumerable) o))
- CheckChildType (oc, addFirst);
- return;
- }
- else
- throw new ArgumentException ("Invalid child type: " + o.GetType ());
- }
- public void Add (object content)
- {
- if (content == null)
- return;
- foreach (object o in XUtil.ExpandArray (content))
- {
- if (!OnAddingObject (o, false, last, false))
- {
- var node = XUtil.ToNode (o);
- OnAddingObject (node);
- AddNode (node);
- OnAddedObject (node);
- }
- }
- }
-
- void AddNode (XNode n)
- {
- CheckChildType (n, false);
- n = (XNode) XUtil.GetDetachedObject (n);
- n.SetOwner (this);
- if (first == null)
- last = first = n;
- else {
- last.NextNode = n;
- n.PreviousNode = last;
- last = n;
- }
- }
- public void Add (params object [] content)
- {
- if (content == null)
- return;
- foreach (object o in XUtil.ExpandArray (content))
- Add (o);
- }
- public void AddFirst (object content)
- {
- if (first == null)
- Add (content);
- else
- first.AddBeforeSelf (XUtil.ExpandArray (content));
- }
- public void AddFirst (params object [] content)
- {
- if (content == null)
- return;
- if (first == null)
- Add (content);
- else
- foreach (object o in XUtil.ExpandArray (content))
- if (!OnAddingObject (o, false, first.PreviousNode, true))
- first.AddBeforeSelf (o);
- }
- internal virtual bool OnAddingObject (object o, bool rejectAttribute, XNode refNode, bool addFirst)
- {
- return false;
- }
-
- public XmlWriter CreateWriter ()
- {
- return new XNodeWriter (this);
- }
- public IEnumerable <XNode> Nodes ()
- {
- XNode next;
- for (XNode n = FirstNode; n != null; n = next) {
- next = n.NextNode;
- yield return n;
- }
- }
- public IEnumerable<XNode> DescendantNodes ()
- {
- foreach (XNode n in Nodes ()) {
- yield return n;
- XContainer c = n as XContainer;
- if (c != null)
- foreach (XNode d in c.DescendantNodes ())
- yield return d;
- }
- }
- public IEnumerable <XElement> Descendants ()
- {
- foreach (XNode n in DescendantNodes ()) {
- XElement el = n as XElement;
- if (el != null)
- yield return el;
- }
- }
- public IEnumerable <XElement> Descendants (XName name)
- {
- foreach (XElement el in Descendants ())
- if (el.Name == name)
- yield return el;
- }
- public IEnumerable <XElement> Elements ()
- {
- foreach (XNode n in Nodes ()) {
- XElement el = n as XElement;
- if (el != null)
- yield return el;
- }
- }
- public IEnumerable <XElement> Elements (XName name)
- {
- foreach (XElement el in Elements ())
- if (el.Name == name)
- yield return el;
- }
- public XElement Element (XName name)
- {
- foreach (XElement el in Elements ())
- if (el.Name == name)
- return el;
- return null;
- }
- internal void ReadContentFrom (XmlReader reader, LoadOptions options)
- {
- while (!reader.EOF) {
- if (reader.NodeType == XmlNodeType.EndElement)
- // end of the element.
- break;
- Add (XNode.ReadFrom (reader, options));
- }
- }
- public void RemoveNodes ()
- {
- foreach (XNode n in Nodes ())
- n.Remove ();
- }
- public void ReplaceNodes (object content)
- {
- // First, it creates a snapshot copy, then removes the contents, and then adds the copy. http://msdn.microsoft.com/en-us/library/system.xml.linq.xcontainer.replacenodes.aspx
- if (FirstNode == null) {
- Add (content);
- return;
- }
- var l = new List<object> ();
- foreach (var obj in XUtil.ExpandArray (content))
- l.Add (obj);
- RemoveNodes ();
- Add (l);
- }
- public void ReplaceNodes (params object [] content)
- {
- ReplaceNodes ((object) content);
- }
- }
- }