1 files changed, 118 insertions, 0 deletions
diff --git a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/IDocumentLine.cs b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/IDocumentLine.cs
new file mode 100644
index 0000000000..7135d74dad
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+++ b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/IDocumentLine.cs
@@ -0,0 +1,118 @@
+//
+// IDocumentLine.cs
+//
+// Author:
+//       Mike Krüger <mkrueger@xamarin.com>
+//
+// Copyright (c) 2014 Xamarin Inc. (http://xamarin.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 MonoDevelop.Core.Text;
+using System.Text;
+using MonoDevelop.Ide.Editor.Highlighting;
+
+namespace MonoDevelop.Ide.Editor
+{
+	/// <summary>
+	/// A line inside a <see cref="ITextDocument"/>.
+	/// </summary>
+	public interface IDocumentLine : ISegment
+	{
+		/// <summary>
+		/// Gets the length of the line including the line delimiter.
+		/// </summary>
+		int LengthIncludingDelimiter {
+			get;
+		}
+
+		int EndOffsetIncludingDelimiter {
+			get;
+		}
+
+		/// <summary>
+		/// Gets the text segment of the line including the line delimiter.
+		/// </summary>
+		ISegment SegmentIncludingDelimiter {
+			get;
+		}
+
+		/// <summary>
+		/// Gets the unicode newline for this line. Returns UnicodeNewline.Unknown for no new line (in the last line of the document)
+		/// </summary>EndOffsetIncludingDelimiterEndOffsetIncludingDelimiter
+		UnicodeNewline UnicodeNewline {
+			get;
+		}
+
+		/// <summary>
+		/// Gets the length of the line terminator.
+		/// Returns 1 or 2; or 0 at the end of the document.
+		/// </summary>
+		int DelimiterLength { get; }
+
+		/// <summary>
+		/// Gets the number of this line.
+		/// The first line has the number 1.
+		/// </summary>
+		int LineNumber { get; }
+
+		/// <summary>
+		/// Gets the previous line. Returns null if this is the first line in the document.
+		/// </summary>
+		IDocumentLine PreviousLine { get; }
+
+		/// <summary>
+		/// Gets the next line. Returns null if this is the last line in the document.
+		/// </summary>
+		IDocumentLine NextLine { get; }
+
+		/// <summary>
+		/// Gets whether the line was deleted.
+		/// </summary>
+		bool IsDeleted { get; }
+	}
+
+	public static class DocumentLineExt
+	{
+		/// <summary>
+		/// This method gets the line indentation.
+		/// </summary>
+		/// <param name = "line"></param>
+		/// <param name="doc">
+		/// The <see cref="IReadonlyTextDocument"/> the line belongs to.
+		/// </param>
+		/// <returns>
+		/// The indentation of the line (all whitespace chars up to the first non ws char).
+		/// </returns>
+		public static string GetIndentation (this IDocumentLine line, IReadonlyTextDocument  doc)
+		{
+			var result = new StringBuilder ();
+			int offset = line.Offset;
+			int max = Math.Min (offset + line.LengthIncludingDelimiter, doc.Length);
+			for (int i = offset; i < max; i++) {
+				char ch = doc.GetCharAt (i);
+				if (ch != ' ' && ch != '\t')
+					break;
+				result.Append (ch);
+			}
+			return result.ToString ();
+		}
+	}
+}
+