1 files changed, 90 insertions, 0 deletions
diff --git a/src/Editor/Text/Def/TextUI/Tags/Legacy/IBlockTag.cs b/src/Editor/Text/Def/TextUI/Tags/Legacy/IBlockTag.cs
new file mode 100644
index 0000000..99a6d30
--- /dev/null
+++ b/src/Editor/Text/Def/TextUI/Tags/Legacy/IBlockTag.cs
@@ -0,0 +1,90 @@
+//
+//  Copyright (c) Microsoft Corporation. All rights reserved.
+//  Licensed under the MIT License. See License.txt in the project root for license information.
+//
+namespace Microsoft.VisualStudio.Text.Tagging
+{
+    using System;
+    using Microsoft.VisualStudio.Text.Adornments;
+
+    /// <summary>
+    /// Represents a structural code block, which is used for vertical structural line adornments.
+    /// </summary>
+    [Obsolete("Use IStructureTag instead")]
+    public interface IBlockTag : ITag
+    {
+        /// <summary>
+        /// Gets the span of the structural block.
+        /// </summary>
+        SnapshotSpan Span { get; }
+        
+        /// <summary>
+        /// Gets the level of nested-ness of the structural block.
+        /// </summary>
+        int Level { get; }
+        
+        /// <summary>
+        /// Gets the span of the statement that control the structral block.
+        /// </summary>
+        /// <remarks>
+        /// <para>
+        /// For example, in the following snippet of code,
+        /// <code>
+        /// if (condition1 &amp;&amp;
+        ///     condition2) // comment
+        /// {
+        ///     something;
+        /// }
+        /// </code>
+        /// this.StatementSpan would extend from the start of the "if" to the end of comment.
+        /// this.Span would extend from before the "{" to the end of the "}".
+        /// </para>
+        /// </remarks>
+        SnapshotSpan StatementSpan { get; }
+        
+        /// <summary>
+        /// Gets the hierarchical parent of the structural block.
+        /// </summary>
+        IBlockTag Parent { get; }
+
+        /// <summary>
+        /// Determines the semantic type of the structural block.
+        /// <remarks>
+        /// See <see cref="PredefinedStructureTypes"/> for the canonical types.
+        /// Use <see cref="PredefinedStructureTypes.Nonstructural"/> for blocks that will not have any visible affordance
+        /// (but will be used for outlining).
+        /// </remarks>
+        /// </summary>
+        string Type { get; }
+
+        /// <summary>
+        /// Determines whether a block can be collapsed.
+        /// </summary>
+        bool IsCollapsible { get; }
+
+        /// <summary>
+        /// Determines whether a block is collapsed by default.
+        /// </summary>
+        bool IsDefaultCollapsed { get; }
+       
+        /// <summary>
+        /// Determines whether a block is an implementation block.
+        /// </summary>
+        /// <remarks>
+        /// Implementation blocks are the blocks of code following a method definition.
+        /// They are used for commands such as the Visual Studio Collapse to Definition command,
+        /// which hides the implementation block and leaves only the method definition exposed.
+        /// </remarks>
+        bool IsImplementation { get; }
+
+        /// <summary>
+        /// Gets the data object for the collapsed UI. If the default is set, returns null.
+        /// </summary>
+        object CollapsedForm { get; }
+
+        /// <summary>
+        /// Gets the data object for the collapsed UI tooltip. If the default is set, returns null.
+        /// </summary>
+        object CollapsedHintForm { get; }
+    }
+}