ViewerPreferences.cs :  » PDF » PDF-Clown » it » stefanochizzolini » clown » documents » interaction » viewer » C# / CSharp Open Source

/*
  Copyright 2006,2008 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.documents;
using it.stefanochizzolini.clown.files;
using it.stefanochizzolini.clown.objects;

using System;
using System.Collections.Generic;

namespace it.stefanochizzolini.clown.documents.interaction.viewer{
  /**
    <summary>Viewer preferences [PDF:1.6:8.1].</summary>
  */
  public class ViewerPreferences
    : PdfObjectWrapper<PdfDictionary>
  {
    #region types
    /**
      <summary>Predominant reading order for text [PDF:1.6:8.1].</summary>
    */
    public enum DirectionEnum
    {
      /**
        <summary>Left to right.</summary>
      */
      LeftToRight,
      /**
        <summary>Right to left.</summary>
      */
      RightToLeft
    };
    #endregion

    #region static
    #region fields
    private static readonly Dictionary<DirectionEnum,PdfName> DirectionEnumCodes;
    #endregion

    #region constructors
    static ViewerPreferences()
    {
      DirectionEnumCodes = new Dictionary<DirectionEnum,PdfName>();
      DirectionEnumCodes[DirectionEnum.LeftToRight] = PdfName.L2R;
      DirectionEnumCodes[DirectionEnum.RightToLeft] = PdfName.R2L;
    }
    #endregion

    #region interface
    #region private
    /**
      <summary>Gets the code corresponding to the given value.</summary>
    */
    private static PdfName ToCode(
      DirectionEnum value
      )
    {return DirectionEnumCodes[value];}

    /**
      <summary>Gets the direction corresponding to the given value.</summary>
    */
    private static DirectionEnum ToDirectionEnum(
      PdfName value
      )
    {
      foreach(KeyValuePair<DirectionEnum,PdfName> direction in DirectionEnumCodes)
      {
        if(direction.Value.Equals(value))
          return direction.Key;
      }
      return DirectionEnum.LeftToRight;
    }
    #endregion
    #endregion
    #endregion

    #region dynamic
    #region constructors
    public ViewerPreferences(
      Document context
      ) : base(
        context.File,
        new PdfDictionary()
        )
    {}

    internal ViewerPreferences(
      PdfDirectObject baseObject,
      PdfIndirectObject container
      ) : base(
        baseObject,
        container
        )
    {}
    #endregion

    #region interface
    #region public
    public bool CenterWindow
    {
      get{return GetEntry<bool,PdfBoolean>(PdfName.CenterWindow);}
      set{SetEntry<bool,PdfBoolean>(PdfName.CenterWindow,value);}
    }

    public override object Clone(
      Document context
      )
    {throw new NotImplementedException();}

    public DirectionEnum Direction
    {
      get
      {return ToDirectionEnum((PdfName)BaseDataObject[PdfName.Direction]);}
      set
      {BaseDataObject[PdfName.Direction] = ToCode(value);}
    }

    public bool DisplayDocTitle
    {
      get{return GetEntry<bool,PdfBoolean>(PdfName.DisplayDocTitle);}
      set{SetEntry<bool,PdfBoolean>(PdfName.DisplayDocTitle,value);}
    }

    public bool FitWindow
    {
      get{return GetEntry<bool,PdfBoolean>(PdfName.FitWindow);}
      set{SetEntry<bool,PdfBoolean>(PdfName.FitWindow,value);}
    }

    public bool HideMenubar
    {
      get{return GetEntry<bool,PdfBoolean>(PdfName.HideMenubar);}
      set{SetEntry<bool,PdfBoolean>(PdfName.HideMenubar,value);}
    }

    public bool HideToolbar
    {
      get{return GetEntry<bool,PdfBoolean>(PdfName.HideToolbar);}
      set{SetEntry<bool,PdfBoolean>(PdfName.HideToolbar,value);}
    }

    public bool HideWindowUI
    {
      get{return GetEntry<bool,PdfBoolean>(PdfName.HideWindowUI);}
      set{SetEntry<bool,PdfBoolean>(PdfName.HideWindowUI,value);}
    }
    #endregion

    #region protected
    protected T GetEntry<T,TPdf>(
      PdfName key
      )
      where TPdf : PdfAtomicObject<T>
    {
      try{return (T)((TPdf)File.Resolve(BaseDataObject[key])).Value;}
      catch{return default(T);}
    }

    protected void SetEntry<T,TPdf>(
      PdfName key,
      T value
      )
      where TPdf : PdfAtomicObject<T>, new()
    {
      if(!BaseDataObject.ContainsKey(key))
        BaseDataObject[key] = new TPdf();

      ((TPdf)File.Resolve(BaseDataObject[key])).Value = value;
    }
    #endregion
    #endregion
    #endregion
  }
}