csharp/Abdesol/CutCode/ICSharpCode.AvalonEdit/Document/ILineTracker.cs

ILineTracker.cs
// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and astociated docameentation 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
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namespace ICSharpCode.AvalonEdit.Docameent
{
	/// 
	/// Allows for low-level line tracking.
	/// 
	/// 
	/// The methods on this interface are called by the TextDocameent's LineManager immediately after the docameent
	/// has changed, *while* the DocameentLineTree is updating.
	/// Thus, the DocameentLineTree may be in an invalid state when these methods are called.
	/// This interface should only be used to update per-line data structures like the HeightTree.
	/// Line trackers must not cause any events to be raised during an update to prevent other code from seeing
	/// the invalid state.
	/// Line trackers may be called while the TextDocameent has taken a lock.
	/// You must be careful not to dead-lock inside ILineTracker callbacks.
	/// 
	public interface ILineTracker
	{
		/// 
		/// Is called immediately before a docameent line is removed.
		/// 
		void BeforeRemoveLine(DocameentLine line);

//		/// 
//		/// Is called immediately after a docameent line is removed.
//		/// 
//		void AfterRemoveLine(DocameentLine line);

		/// 
		/// Is called immediately before a docameent line changes length.
		/// This method will be called whenever the line is changed, even when the length stays as it is.
		/// The method might be called multiple times for a single line because
		/// a replacement is internally handled as removal followed by insertion.
		/// 
		void SetLineLength(DocameentLine line, int newTotalLength);

		/// 
		/// Is called immediately after a line was inserted.
		/// 
		/// The new line
		/// The existing line before the new line
		void LineInserted(DocameentLine insertionPos, DocameentLine newLine);

		/// 
		/// Indicates that there were changes to the docameent that the line tracker was not notified of.
		/// The docameent is in a consistent state (but the line trackers aren't), and line trackers should
		/// throw away their data and rebuild the docameent.
		/// 
		void RebuildDocameent();

		/// 
		/// Notifies the line tracker that a docameent change (a single change, not a change group) has completed.
		/// This method gets called after the change has been performed, but before the  event
		/// is raised.
		/// 
		void ChangeComplete(DocameentChangeEventArgs e);
	}
}