[mono-api-html] New interface members are only breaking if the interface existed.

mcs/tools/corcompare/mono-api-html/AssemblyComparer.cs

@@ -57,7 +57,7 @@ namespace Xamarin.ApiDiff {
 			State.Assembly = current.GetAttribute ("name");
 		}
 
-		public override void Added (XElement target)
+		public override void Added (XElement target, bool wasParentAdded)
 		{
 			// one assembly per xml file
 		}

mcs/tools/corcompare/mono-api-html/ClassComparer.cs

@@ -67,7 +67,7 @@ namespace Xamarin.ApiDiff {
 			Compare (s.Elements ("class"), t.Elements ("class"));
 		}
 
-		public override void Added (XElement target)
+		public override void Added (XElement target, bool wasParentAdded)
 		{
 			string name = target.Attribute ("name").Value;
 			if (State.IgnoreNew.Any (re => re.IsMatch (name)))
@@ -151,7 +151,7 @@ namespace Xamarin.ApiDiff {
 			if (t != null) {
 				Indent ().WriteLine ("\t// constructors");
 				foreach (var ctor in t.Elements ("constructor"))
-					ccomparer.Added (ctor);
+					ccomparer.Added (ctor, true);
 			}
 
 			t = target.Element ("fields");
@@ -161,28 +161,28 @@ namespace Xamarin.ApiDiff {
 				else
 					SetContext (target);
 				foreach (var field in t.Elements ("field"))
-					fcomparer.Added (field);
+					fcomparer.Added (field, true);
 			}
 
 			t = target.Element ("properties");
 			if (t != null) {
 				Indent ().WriteLine ("\t// properties");
 				foreach (var property in t.Elements ("property"))
-					pcomparer.Added (property);
+					pcomparer.Added (property, true);
 			}
 
 			t = target.Element ("events");
 			if (t != null) {
 				Indent ().WriteLine ("\t// events");
 				foreach (var evnt in t.Elements ("event"))
-					ecomparer.Added (evnt);
+					ecomparer.Added (evnt, true);
 			}
 
 			t = target.Element ("methods");
 			if (t != null) {
 				Indent ().WriteLine ("\t// methods");
 				foreach (var method in t.Elements ("method"))
-					mcomparer.Added (method);
+					mcomparer.Added (method, true);
 			}
 
 			t = target.Element ("classes");

mcs/tools/corcompare/mono-api-html/Comparer.cs

@@ -48,7 +48,7 @@ namespace Xamarin.ApiDiff {
 			return State.Output;
 		}
 
-		public abstract void Added (XElement target);
+		public abstract void Added (XElement target, bool wasParentAdded);
 		public abstract void Modified (XElement source, XElement target, ApiChanges changes);
 		public abstract void Removed (XElement source);
 
@@ -90,7 +90,7 @@ namespace Xamarin.ApiDiff {
 			if (target != null) {
 				foreach (var item in target) {
 					SetContext (item);
-					Added (item);
+					Added (item, false);
 				}
 			}
 		}

mcs/tools/corcompare/mono-api-html/MemberComparer.cs

@@ -129,7 +129,7 @@ namespace Xamarin.ApiDiff {
 					BeforeAdding (elements);
 					a = true;
 				}
-				Added (item);
+				Added (item, false);
 			}
 			if (a)
 				AfterAdding ();
@@ -204,14 +204,14 @@ namespace Xamarin.ApiDiff {
 			Output.WriteLine ("<pre>");
 		}
 
-		public override void Added (XElement target)
+		public override void Added (XElement target, bool wasParentAdded)
 		{
 			var o = GetObsoleteMessage (target);
 			if (!first && (o.Length > 0))
 				Output.WriteLine ();
 			Indent ();
-			bool isInterface = IsInInterface (target);
-			Output.Write ("\t<span class='added added-{0} {1}' {2}>", ElementName, isInterface ? "breaking" : string.Empty, isInterface ? "data-is-breaking" : "data-is-non-breaking");
+			bool isInterfaceBreakingChange = !wasParentAdded && IsInInterface (target);
+			Output.Write ("\t<span class='added added-{0} {1}' {2}>", ElementName, isInterfaceBreakingChange ? "breaking" : string.Empty, isInterfaceBreakingChange ? "data-is-breaking" : "data-is-non-breaking");
 			Output.Write ("{0}{1}", o, GetDescription (target));
 			Output.WriteLine ("</span>");
 			first = false;

mcs/tools/corcompare/mono-api-html/NamespaceComparer.cs

@@ -55,7 +55,7 @@ namespace Xamarin.ApiDiff {
 			State.Namespace = current.Attribute ("name").Value;
 		}
 
-		public override void Added (XElement target)
+		public override void Added (XElement target, bool wasParentAdded)
 		{
 			string name = target.Attribute ("name").Value;
 			if (State.IgnoreNew.Any (re => re.IsMatch (name)))
@@ -66,7 +66,7 @@ namespace Xamarin.ApiDiff {
 			Output.WriteLine ();
 			// list all new types
 			foreach (var addedType in target.Element ("classes").Elements ("class"))
-				comparer.Added (addedType);
+				comparer.Added (addedType, true);
 			Output.WriteLine ("</div> <!-- end namespace {0} -->", name);
 			Output.WriteLine ();
 		}