3 // Sebastien Pouliot <sebastien@xamarin.com>
5 // Copyright 2013 Xamarin Inc. http://www.xamarin.com
7 // Permission is hereby granted, free of charge, to any person obtaining
8 // a copy of this software and associated documentation files (the
9 // "Software"), to deal in the Software without restriction, including
10 // without limitation the rights to use, copy, modify, merge, publish,
11 // distribute, sublicense, and/or sell copies of the Software, and to
12 // permit persons to whom the Software is furnished to do so, subject to
13 // the following conditions:
15 // The above copyright notice and this permission notice shall be
16 // included in all copies or substantial portions of the Software.
18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 using System.Collections.Generic;
31 using System.Xml.Linq;
33 namespace Xamarin.ApiDiff {
35 public abstract class Comparer {
37 protected List<XElement> removed = new List<XElement> ();
38 protected ApiChanges modified = new ApiChanges ();
40 public TextWriter Output {
41 get { return State.Output; }
44 protected TextWriter Indent ()
46 for (int i = 0; i < State.Indent; i++)
47 State.Output.Write ("\t");
51 public abstract void Added (XElement target);
52 public abstract void Modified (XElement source, XElement target, ApiChanges changes);
53 public abstract void Removed (XElement source);
55 public virtual bool Equals (XElement source, XElement target, ApiChanges changes)
57 return XNode.DeepEquals (source, target);
60 public abstract void SetContext (XElement current);
62 public virtual void Compare (IEnumerable<XElement> source, IEnumerable<XElement> target)
67 foreach (var s in source) {
69 string sn = s.GetAttribute ("name");
70 var t = target == null ? null : target.SingleOrDefault (x => x.GetAttribute ("name") == sn);
72 // not in target, it was removed
77 if (Equals (s, t, modified))
80 // still in target so will be part of Added
81 Modified (s, t, modified);
84 // delayed, that way we show "Modified", "Added" and then "Removed"
85 foreach (var item in removed) {
89 // remaining == newly added in target
91 foreach (var item in target) {