source: tags/3.3.1/HeuristicLab.ExtLibs/HeuristicLab.WinFormsUI/2.3.1/WinFormsUI-2.3.1/Docking/DockContentCollection.cs @ 4537

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;

namespace WeifenLuo.WinFormsUI.Docking {
  public class DockContentCollection : ReadOnlyCollection<IDockContent> {
    private static List<IDockContent> _emptyList = new List<IDockContent>(0);

    internal DockContentCollection()
      : base(new List<IDockContent>()) {
    }

    internal DockContentCollection(DockPane pane)
      : base(_emptyList) {
      m_dockPane = pane;
    }

    private DockPane m_dockPane = null;
    private DockPane DockPane {
      get { return m_dockPane; }
    }

    public new IDockContent this[int index] {
      get {
        if (DockPane == null)
          return Items[index] as IDockContent;
        else
          return GetVisibleContent(index);
      }
    }

    internal int Add(IDockContent content) {
#if DEBUG
      if (DockPane != null)
        throw new InvalidOperationException();
#endif

      if (Contains(content))
        return IndexOf(content);

      Items.Add(content);
      return Count - 1;
    }

    internal void AddAt(IDockContent content, int index) {
#if DEBUG
      if (DockPane != null)
        throw new InvalidOperationException();
#endif

      if (index < 0 || index > Items.Count - 1)
        return;

      if (Contains(content))
        return;

      Items.Insert(index, content);
    }

    public new bool Contains(IDockContent content) {
      if (DockPane == null)
        return Items.Contains(content);
      else
        return (GetIndexOfVisibleContents(content) != -1);
    }

    public new int Count {
      get {
        if (DockPane == null)
          return base.Count;
        else
          return CountOfVisibleContents;
      }
    }

    public new int IndexOf(IDockContent content) {
      if (DockPane == null) {
        if (!Contains(content))
          return -1;
        else
          return Items.IndexOf(content);
      } else
        return GetIndexOfVisibleContents(content);
    }

    internal void Remove(IDockContent content) {
      if (DockPane != null)
        throw new InvalidOperationException();

      if (!Contains(content))
        return;

      Items.Remove(content);
    }

    private int CountOfVisibleContents {
      get {
#if DEBUG
        if (DockPane == null)
          throw new InvalidOperationException();
#endif

        int count = 0;
        foreach (IDockContent content in DockPane.Contents) {
          if (content.DockHandler.DockState == DockPane.DockState)
            count++;
        }
        return count;
      }
    }

    private IDockContent GetVisibleContent(int index) {
#if DEBUG
      if (DockPane == null)
        throw new InvalidOperationException();
#endif

      int currentIndex = -1;
      foreach (IDockContent content in DockPane.Contents) {
        if (content.DockHandler.DockState == DockPane.DockState)
          currentIndex++;

        if (currentIndex == index)
          return content;
      }
      throw (new ArgumentOutOfRangeException());
    }

    private int GetIndexOfVisibleContents(IDockContent content) {
#if DEBUG
      if (DockPane == null)
        throw new InvalidOperationException();
#endif

      if (content == null)
        return -1;

      int index = -1;
      foreach (IDockContent c in DockPane.Contents) {
        if (c.DockHandler.DockState == DockPane.DockState) {
          index++;

          if (c == content)
            return index;
        }
      }
      return -1;
    }
  }
}