SetLineDash.cs :  » PDF » PDF-Clown » it » stefanochizzolini » clown » documents » contents » objects » C# / CSharp Open Source

/*
  Copyright 2007,2008 Stefano Chizzolini. http://clown.stefanochizzolini.it

  Contributors:
    * Stefano Chizzolini (original code developer, http://www.stefanochizzolini.it)

  This file should be part of the source code distribution of "PDF Clown library"
  (the Program): see the accompanying README files for more info.

  This Program is free software; you can redistribute it and/or modify it under
  the terms of the GNU General Public License as published by the Free Software
  Foundation; either version 2 of the License, or (at your option) any later version.

  This Program is distributed in the hope that it will be useful, but WITHOUT ANY
  WARRANTY, either expressed or implied; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the License for more details.

  You should have received a copy of the GNU General Public License along with this
  Program (see README files); if not, go to the GNU website (http://www.gnu.org/).

  Redistribution and use, with or without modification, are permitted provided that such
  redistributions retain the above copyright notice, license and disclaimer, along with
  this list of conditions.
*/

using it.stefanochizzolini.clown.bytes;
using it.stefanochizzolini.clown.objects;

using System.Collections.Generic;

namespace it.stefanochizzolini.clown.documents.contents.objects{
  /**
    <summary>'Set the line dash pattern' operation [PDF:1.6:4.3.3].</summary>
  */
  public sealed class SetLineDash
    : Operation
  {
    #region static
    #region fields
    public static readonly string OperatorKeyword = "d";
    #endregion
    #endregion

    #region dynamic
    #region constructors
    public SetLineDash(
      int phase,
      int unitsOn,
      int unitsOff
      ) : base(
        OperatorKeyword,
        new List<PdfDirectObject>(
          new PdfDirectObject[]
          {
            new PdfArray(
              new PdfDirectObject[]
              {
                new PdfInteger(unitsOn),
                new PdfInteger(unitsOff)
              }
              ),
            new PdfInteger(phase)
          }
          )
        )
    {}

    public SetLineDash(
      List<PdfDirectObject> operands
      ) : base(OperatorKeyword,operands)
    {}
    #endregion

    #region interface
    #region public
    public LineDash Value
    {
      get
      {
        // 1. Dash array.
        PdfArray baseDashArray = (PdfArray)operands[0];
        int[] dashArray = new int[baseDashArray.Count];
        for(
          int index = 0,
            length = dashArray.Length;
          index < length;
          index++
          )
        {dashArray[index] = (int)((IPdfNumber)baseDashArray[index]).Value;}
        // 2. Dash phase.
        int dashPhase = (int)((IPdfNumber)operands[1]).Value;

        return new LineDash(dashArray,dashPhase);
      }
      set
      {
        // 1. Dash array.
        int[] dashArray = value.DashArray;
        PdfArray baseDashArray = new PdfArray(dashArray.Length);
        for(
          int index = 0,
            length = dashArray.Length;
          index < length;
          index++
          )
        {baseDashArray[index] = new PdfInteger(dashArray[index]);}
        operands[0] = baseDashArray;

        // 2. Dash phase.
        ((IPdfNumber)operands[1]).Value = value.DashPhase;
      }
    }
    #endregion
    #endregion
    #endregion
  }
}