1 files changed, 66 insertions, 0 deletions
diff --git a/src/Text/Def/TextData/Model/EditTags.cs b/src/Text/Def/TextData/Model/EditTags.cs
new file mode 100644
index 0000000..20cec5b
--- /dev/null
+++ b/src/Text/Def/TextData/Model/EditTags.cs
@@ -0,0 +1,66 @@
+namespace Microsoft.VisualStudio.Text
+{
+    /// <summary>
+    /// Interface that can be used for the <see cref="ITextBuffer.CreateEdit(EditOptions, int?, object)"/> editTag parameter.
+    /// </summary>
+    /// <remarks>
+    /// <para>
+    /// This interface, by itself, does nothing. The derived interfaces, however, can provide some context on the nature of the edit.
+    /// For example, the tags for edits associated with the user doing an "undo" should derive from <see cref="IUndoEditTag"/> and
+    /// <see cref="IUserEditTag"/>.
+    /// </para>
+    /// </remarks>
+    public interface IEditTag { }
+
+    /// <summary>
+    /// Indicates a constraint that no additional edits should be performed in the buffer's <see cref="ITextBuffer.Changed"/> event
+    /// handlers called in response to this edit.
+    /// </summary>
+    /// <remarks>
+    /// <para>
+    /// This constraint is not currently enforced but that may happen in the future.
+    /// </para>
+    /// </remarks>
+    public interface IInviolableEditTag : IEditTag { }
+
+    /// <summary>
+    /// Indicates that this edit will create an invisible undo transaction.
+    /// </summary>
+    public interface IInvisibleEditTag : IEditTag { }
+
+    /// <summary>
+    /// Indicates that the edit is part of an undo or redo.
+    /// </summary>
+    public interface IUndoEditTag : IInviolableEditTag { }
+
+    /// <summary>
+    /// Indicates that the edit is part of automatic formatting.
+    /// </summary>
+    public interface IFormattingEditTag : IInviolableEditTag { }
+
+    /// <summary>
+    /// Indicates that the edit is from a remote collaborator.
+    /// </summary>
+    public interface IRemoteEditTag : IInviolableEditTag, IInvisibleEditTag { }
+
+    /// <summary>
+    /// Indicates that the edit is a direct result of a user action (e.g. typing) as opposed to a side-effect (e.g. the
+    /// automatic formatting after the user types a semicolon).
+    /// </summary>
+    public interface IUserEditTag : IEditTag { }
+
+    /// <summary>
+    /// Indicates that the edit is something like a "paste" where the modified text should be formatted.
+    /// </summary>
+    public interface IFormattingNeededEditTag : IEditTag { }
+
+    /// <summary>
+    /// Indicates that the edit is the result of the user typing a character.
+    /// </summary>
+    public interface ITypingEditTag : IUserEditTag { }
+
+    /// <summary>
+    /// Indicates that the edit is the result of the user typing hitting a backspace or delete.
+    /// </summary>
+    public interface IDeleteEditTag : IUserEditTag { }
+}