FixedSOMLineCollection.cs source code in C# .NET

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

    File: FixedSOMLineCollection.cs

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

    Description: 
        Internal helper class that can store a set of sorted horizontal and vertical FixedSOMLineRanges. 
        These ranges are used in construction of FixedBlocks and Tables
 
    History:
       05/17/2005: agurcan - Created

--*/ 

namespace System.Windows.Documents 
{ 
    using System.Collections.Generic;
    using System.Windows.Shapes; 
    using System.Windows.Media;
    using System.Diagnostics;
    using System.Windows;
 
    //Stores a collection of horizontal and vertical lines sorted by y and x axis respectively
 
    // 

 
    internal sealed class FixedSOMLineCollection
    {
        //--------------------------------------------------------------------
        // 
        // Constructors
        // 
        //--------------------------------------------------------------------- 

        #region Constructors 
        public FixedSOMLineCollection()
        {
            _verticals = new List();
            _horizontals = new List(); 
        }
        #endregion Constructors 
 
        //-------------------------------------------------------------------
        // 
        // Internal Methods
        //
        //---------------------------------------------------------------------
 
#region Public Methods
 
        public bool IsVerticallySeparated(double left, double top, double right, double bottom) 
        {
            return _IsSeparated(_verticals, left, top, right, bottom); 
        }

        public bool IsHorizontallySeparated(double left, double top, double right, double bottom)
        { 
            return _IsSeparated(_horizontals, top, left, bottom, right);
        } 
 
        public void AddVertical(Point point1, Point point2)
        { 
            Debug.Assert(point1.X == point2.X);
            _AddLineToRanges(_verticals, point1.X, point1.Y, point2.Y);
        }
 
        public void AddHorizontal(Point point1, Point point2)
        { 
            Debug.Assert(point1.Y == point2.Y); 
            _AddLineToRanges(_horizontals, point1.Y, point1.X, point2.X);
        } 

        #endregion Public Methods

        #region Private Methods 
        //Merge line 2 into line 1
        private void _AddLineToRanges(List ranges, double line, double start, double end) 
        { 
            if (start > end)
            { 
                double temp = start;
                start = end;
                end = temp;
            } 

            FixedSOMLineRanges range; 
            double maxSeparation = .5 * FixedSOMLineRanges.MinLineSeparation; 

            for (int i=0; i < ranges.Count; i++) 
            {
                if (line < ranges[i].Line - maxSeparation)
                {
                    range = new FixedSOMLineRanges(); 
                    range.Line = line;
                    range.AddRange(start, end); 
                    ranges.Insert(i, range); 
                    return;
                } 
                else if (line < ranges[i].Line + maxSeparation)
                {
                    ranges[i].AddRange(start, end);
                    return; 
                }
            } 
 
            // add to end
            range = new FixedSOMLineRanges(); 
            range.Line = line;
            range.AddRange(start, end);
            ranges.Add(range);
            return; 

        } 
 
        //Generic function that decides whether or not a rectangle as spefied by the points is
        //divided by any of the lines in the line ranges in the passed in list 
        private bool _IsSeparated(List lines, double parallelLowEnd, double perpLowEnd, double parallelHighEnd, double perpHighEnd)
        {
            int startIndex = 0;
            int endIndex = lines.Count; 
            if (endIndex == 0)
            { 
                return false; 
            }
            int i = 0; 

            while (endIndex > startIndex)
            {
                i = (startIndex + endIndex) >> 1; 
                if (lines[i].Line < parallelLowEnd)
                { 
                    startIndex = i + 1; 
                }
                else 
                {
                    if (lines[i].Line <= parallelHighEnd)
                    {
                        break; 
                    }
                    endIndex = i; 
                } 
            }
 
            if (lines[i].Line >= parallelLowEnd && lines[i].Line <= parallelHighEnd)
            {
                do
                { 
                    i--;
                } while (i>=0 && lines[i].Line >= parallelLowEnd); 
 
                i++;
                while (i=0)
                    { 
                        double end = lines[i].End[rangeIndex]; 
                        if (end >= perpHighEnd - allowedMargin)
                        { 
                            return true;
                        }
                    }
                    i++; 
                };
            } 
            return false; 
        }
        #endregion Private Methods 


        #region Public Properties
 
        public List HorizontalLines
        { 
            get 
            {
                return _horizontals; 
            }
        }

        public List VerticalLines 
        {
            get 
            { 
                return _verticals;
            } 
        }

        #endregion Public Properties
 
        //--------------------------------------------------------------------
        // 
        // Private Fields 
        //
        //--------------------------------------------------------------------- 
        #region Private Fields
        private List _horizontals;
        private List _verticals;
        private const double _fudgeFactor = 0.1; // We allow 10% margin at each end 
        #endregion Private Fields
 
    } 

} 



 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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FixedSOMLineCollection.cs source code in C# .NET

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