#region MigraDoc - Creating Documents on the Fly
//
// Authors:
//   Stefan Lange (mailto:Stefan.Lange@pdfsharp.com)
//   Klaus Potzesny (mailto:Klaus.Potzesny@pdfsharp.com)
//   David Stephensen (mailto:David.Stephensen@pdfsharp.com)
//
// Copyright (c) 2001-2009 empira Software GmbH, Cologne (Germany)
//
// http://www.pdfsharp.com
// http://www.migradoc.com
// http://sourceforge.net/projects/pdfsharp
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Diagnostics;
using System.Reflection;
using MigraDoc.DocumentObjectModel.Internals;

namespace MigraDoc.DocumentObjectModel
{
  /// <summary>
  /// Represents a tab inside a paragraph.
  /// </summary>
  public class TabStop : DocumentObject
  {
    /// <summary>
    /// Initializes a new instance of the TabStop class.
    /// </summary>
    public TabStop()
    {
    }

    /// <summary>
    /// Initializes a new instance of the TabStop class with the specified parent.
    /// </summary>
    internal TabStop(DocumentObject parent) : base(parent) { }

    /// <summary>
    /// Initializes a new instance of the TabStop class with the specified position.
    /// </summary>
    public TabStop(Unit position)
      : this()
    {
      this.position = position;
    }

    #region Methods
    /// <summary>
    /// Creates a deep copy of this object.
    /// </summary>
    public new TabStop Clone()
    {
      return (TabStop)DeepCopy();
    }
    #endregion

    #region Properties
    /// <summary>
    /// Gets the tab stop position.
    /// </summary>
    public Unit Position
    {
      get { return this.position; }
    }
    [DV]
    internal Unit position = Unit.NullValue;  // always defined
    // useful enhancement: 'Position = Center' and 'Position = Right'

    /// <summary>
    /// Gets or sets the alignment of the tabstop.
    /// </summary>
    public TabAlignment Alignment
    {
      get { return (TabAlignment)this.alignment.Value; }
      set { this.alignment.Value = (int)value; }
    }
    [DV(Type = typeof(TabAlignment))]
    internal NEnum alignment = NEnum.NullValue(typeof(TabAlignment));

    /// <summary>
    /// Gets or sets the character which is used as a leader for the tabstop.
    /// </summary>
    public TabLeader Leader
    {
      get { return (TabLeader)this.leader.Value; }
      set { this.leader.Value = (int)value; }
    }
    [DV(Type = typeof(TabLeader))]
    internal NEnum leader = NEnum.NullValue(typeof(TabLeader));

    /// <summary>
    /// Generates a '+=' in DDL if it is true, otherwise '-='.
    /// </summary>
    internal bool AddTab = true;
    #endregion

    #region Internal
    /// <summary>
    /// Converts TabStop into DDL.
    /// </summary>
    internal override void Serialize(Serializer serializer)
    {
      if (this.AddTab)
      {
        serializer.WriteLine("TabStops +=");
        serializer.BeginContent();
        serializer.WriteSimpleAttribute("Position", this.Position);
        if (!this.alignment.IsNull)
          serializer.WriteSimpleAttribute("Alignment", this.Alignment);
        if (!this.leader.IsNull)
          serializer.WriteSimpleAttribute("Leader", this.Leader);
        serializer.EndContent();
      }
      else
        serializer.WriteLine("TabStops -= \"" + this.Position.ToString() + "\"");
    }

    /// <summary>
    /// Returns the meta object of this instance.
    /// </summary>
    internal override Meta Meta
    {
      get
      {
        if (meta == null)
          meta = new Meta(typeof(TabStop));
        return meta;
      }
    }
    static Meta meta;
    #endregion
  }
}
