source: branches/2925_AutoDiffForDynamicalModels/HeuristicLab.ExtLibs/HeuristicLab.AvalonEdit/5.0.1/AvalonEdit-5.0.1/Rendering/HeightTreeLineNode.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 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
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// DEALINGS IN THE SOFTWARE.

using System;
using System.Collections.Generic;
using System.Diagnostics;

namespace ICSharpCode.AvalonEdit.Rendering
{
  struct HeightTreeLineNode
  {
    internal HeightTreeLineNode(double height)
    {
      this.collapsedSections = null;
      this.height = height;
    }
    
    internal double height;
    internal List<CollapsedLineSection> collapsedSections;
    
    internal bool IsDirectlyCollapsed {
      get { return collapsedSections != null; }
    }
    
    internal void AddDirectlyCollapsed(CollapsedLineSection section)
    {
      if (collapsedSections == null)
        collapsedSections = new List<CollapsedLineSection>();
      collapsedSections.Add(section);
    }
    
    internal void RemoveDirectlyCollapsed(CollapsedLineSection section)
    {
      Debug.Assert(collapsedSections.Contains(section));
      collapsedSections.Remove(section);
      if (collapsedSections.Count == 0)
        collapsedSections = null;
    }
    
    /// <summary>
    /// Returns 0 if the line is directly collapsed, otherwise, returns <see cref="height"/>.
    /// </summary>
    internal double TotalHeight {
      get {
        return IsDirectlyCollapsed ? 0 : height;
      }
    }
  }
}