FixedSOMContainer.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Documents / FixedSOMContainer.cs / 1305600 / FixedSOMContainer.cs
                        
                        
                            /*++ 

    File: FixedSOMContainer.cs

    Copyright (C) 2005 Microsoft Corporation. All rights reserved. 

    Description: 
       Abstract class that provides a common base class for all semantic containers 

    History: 
       05/17/2005: agurcan - Created

--*/
 
namespace System.Windows.Documents
{ 
    using System.Collections.Generic; 
    using System.Diagnostics;
    using System.Windows.Media; 

    internal abstract class FixedSOMContainer :FixedSOMSemanticBox, IComparable
    {
        //-------------------------------------------------------------------- 
        //
        // Constructors 
        // 
        //---------------------------------------------------------------------
 
        #region Constructors
        protected FixedSOMContainer()
        {
            _semanticBoxes = new List(); 
        }
        #endregion Constructors 
 
        int IComparable.CompareTo(object comparedObj)
        { 
            int result = Int32.MinValue;

            FixedSOMPageElement compared = comparedObj as FixedSOMPageElement;
            FixedSOMPageElement This = this as FixedSOMPageElement; 

            Debug.Assert(compared != null); 
            Debug.Assert(This != null); 
            if (compared == null)
            { 
                throw new ArgumentException(SR.Get(SRID.UnexpectedParameterType, comparedObj.GetType(), typeof(FixedSOMContainer)), "comparedObj");
            }
            SpatialComparison compareHor = base._CompareHorizontal(compared, false);
            SpatialComparison compareVer = base._CompareVertical(compared); 

            Debug.Assert(compareHor != SpatialComparison.None); 
            Debug.Assert(compareVer != SpatialComparison.None); 

            switch (compareHor) 
            {

            case SpatialComparison.Before:
                if (compareVer != SpatialComparison.After) 
                {
                    result = -1; 
                } 
                break;
 
            case SpatialComparison.After:
                if (compareVer != SpatialComparison.Before)
                {
                    result = 1; 
                }
                break; 
 
            case SpatialComparison.OverlapBefore:
                if (compareVer == SpatialComparison.Before) 
                {
                    result =  -1;
                }
                else if (compareVer == SpatialComparison.After) 
                {
                    result = 1; 
                } 
                break;
 
            case SpatialComparison.OverlapAfter:
                if (compareVer == SpatialComparison.After)
                {
                    result = 1; 
                }
                else if (compareVer == SpatialComparison.Before) 
                { 
                    result = -1;
                } 
                break;

            case SpatialComparison.Equal:
                switch (compareVer) 
                {
                case SpatialComparison.After: 
                case SpatialComparison.OverlapAfter: 
                    result = 1;
                    break; 
                case SpatialComparison.Before:
                case SpatialComparison.OverlapBefore:
                    result = -1;
                    break; 
                case SpatialComparison.Equal:
                    result = 0; 
                    break; 
                default:
                    Debug.Assert(false); 
                    break;
                }
                break;
 
            default:
                //Shouldn't happen 
                Debug.Assert(false); 
                break;
            } 

            if (result == Int32.MinValue)
            {
                //Indecisive. Does markup order help? 

                if (This.FixedNodes.Count == 0 || compared.FixedNodes.Count == 0) 
                { 
                    result = 0;
                } 
                else
                {
                    FixedNode thisObjFirstNode = This.FixedNodes[0];
                    FixedNode thisObjLastNode = This.FixedNodes[This.FixedNodes.Count - 1]; 

                    FixedNode otherObjFirstNode = compared.FixedNodes[0]; 
                    FixedNode otherObjLastNode = compared.FixedNodes[compared.FixedNodes.Count - 1]; 

                    if (This.FixedSOMPage.MarkupOrder.IndexOf(otherObjFirstNode) - This.FixedSOMPage.MarkupOrder.IndexOf(thisObjLastNode) == 1) 
                    {
                        result = -1;
                    }
                    else if (This.FixedSOMPage.MarkupOrder.IndexOf(otherObjLastNode) - This.FixedSOMPage.MarkupOrder.IndexOf(thisObjFirstNode) == 1) 
                    {
                        result =  1; 
                    } 
                    else
                    { 
                        //Indecisive. Whichever is below comes after; if same whichever is on the right comes after
                        int absVerComparison = _SpatialToAbsoluteComparison(compareVer);
                        result = absVerComparison != 0 ? absVerComparison : _SpatialToAbsoluteComparison(compareHor);
                    } 
                }
            } 
 
            return result;
 
        }
        #region Protected Methods

        protected void AddSorted(FixedSOMSemanticBox box) 
        {
            int i=_semanticBoxes.Count-1; 
            for (; i>=0; i--) 
            {
                if (box.CompareTo(_semanticBoxes[i]) == 1) 
                {
                    break;
                }
            } 
            _semanticBoxes.Insert(i+1, box);
 
            _UpdateBoundingRect(box.BoundingRect); 

        } 

        protected void Add(FixedSOMSemanticBox box)
        {
            _semanticBoxes.Add(box); 
            _UpdateBoundingRect(box.BoundingRect);
 
        } 
        #endregion
 
        #region public Properties

        internal virtual FixedElement.ElementType[] ElementTypes
        { 
            get
            { 
                return new FixedElement.ElementType[0]; 
            }
        } 

        public List SemanticBoxes
        {
            get 
            {
                return _semanticBoxes; 
            } 
            set
            { 
                _semanticBoxes = value;
            }
        }
 
        public List FixedNodes
        { 
            get 
            {
                if (_fixedNodes == null) 
                {
                    _ConstructFixedNodes();
                }
                return _fixedNodes; 
            }
        } 
 
        #endregion
 
        #region Private methods

        void _ConstructFixedNodes()
        { 
            _fixedNodes = new List();
            foreach (FixedSOMSemanticBox box in _semanticBoxes) 
            { 
                FixedSOMElement element = box as FixedSOMElement;
                if (element != null) 
                {
                    _fixedNodes.Add(element.FixedNode);
                }
                else 
                {
                    FixedSOMContainer container = box as FixedSOMContainer; 
                    Debug.Assert(container != null); 
                    List nodes = container.FixedNodes;
                    foreach (FixedNode node in nodes) 
                    {
                        _fixedNodes.Add(node);
                    }
                } 
            }
        } 
 
        void _UpdateBoundingRect(Rect rect)
        { 
            if (_boundingRect.IsEmpty)
            {
                _boundingRect = rect;
            } 
            else
            { 
                _boundingRect.Union(rect); 
            }
        } 


        #endregion Private methods
 
        //-------------------------------------------------------------------
        // 
        // Protected Fields 
        //
        //--------------------------------------------------------------------- 

        #region Protected Fields
        protected List _semanticBoxes;
        protected List _fixedNodes; 
        #endregion Protected Fields
 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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