#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) 2001-2008 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;
using MigraDoc.DocumentObjectModel.Visitors;
using MigraDoc.DocumentObjectModel.Tables;
using MigraDoc.DocumentObjectModel.Shapes.Charts;
using MigraDoc.DocumentObjectModel.Shapes;

namespace MigraDoc.DocumentObjectModel
{
  /// <summary>
  /// Represents a collection of document elements.
  /// </summary>
  public class DocumentElements : DocumentObjectCollection, IVisitable
  {
    /// <summary>
    /// Initializes a new instance of the DocumentElements class.
    /// </summary>
    public DocumentElements()
    {
    }

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

    /// <summary>
    /// Gets a document object by its index.
    /// </summary>
    public new DocumentObject this[int index]
    {
      get { return base[index]; }
    }

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

    /// <summary>
    /// Adds a new paragraph to the collection.
    /// </summary>
    public Paragraph AddParagraph()
    {
      Paragraph paragraph = new Paragraph();
      Add(paragraph);
      return paragraph;
    }

    /// <summary>
    /// Adds a new paragraph with the specified text to the collection.
    /// </summary>
    public Paragraph AddParagraph(string text)
    {
      Paragraph paragraph = new Paragraph();
      paragraph.AddText(text);
      Add(paragraph);
      return paragraph;
    }

    /// <summary>
    /// Adds a new paragraph with the specified text and style to the collection.
    /// </summary>
    public Paragraph AddParagraph(string text, string style)
    {
      Paragraph paragraph = new Paragraph();
      paragraph.AddText(text);
      paragraph.Style = style;
      Add(paragraph);
      return paragraph;
    }

    /// <summary>
    /// Adds a new table to the collection.
    /// </summary>
    public Table AddTable()
    {
      Table tbl = new Table();
      Add(tbl);
      return tbl;
    }

    /// <summary>
    /// Adds a new legend to the collection.
    /// </summary>
    public Legend AddLegend()
    {
      Legend legend = new Legend();
      Add(legend);
      return legend;
    }

    /// <summary>
    /// Add a manual page break.
    /// </summary>
    public void AddPageBreak()
    {
      PageBreak pageBreak = new PageBreak();
      Add(pageBreak);
    }

    /// <summary>
    /// Adds a new barcode to the collection.
    /// </summary>
    public Barcode AddBarcode()
    {
      Barcode barcode = new Barcode();
      Add(barcode);
      return barcode;
    }

    /// <summary>
    /// Adds a new chart with the specified type to the collection.
    /// </summary>
    public Chart AddChart(ChartType type)
    {
      Chart chart = AddChart();
      chart.Type = type;
      return chart;
    }

    /// <summary>
    /// Adds a new chart with the specified type to the collection.
    /// </summary>
    public Chart AddChart()
    {
      Chart chart = new Chart();
      chart.Type = ChartType.Line;
      Add(chart);
      return chart;
    }

    /// <summary>
    /// Adds a new image to the collection.
    /// </summary>
    public Image AddImage(string name)
    {
      Image image = new Image();
      image.Name = name;
      Add(image);
      return image;
    }

    /// <summary>
    /// Adds a new text frame to the collection.
    /// </summary>
    public TextFrame AddTextFrame()
    {
      TextFrame textFrame = new TextFrame();
      Add(textFrame);
      return textFrame;
    }
    #endregion

    #region Internal
    /// <summary>
    /// Converts DocumentElements into DDL.
    /// </summary>
    internal override void Serialize(Serializer serializer)
    {
      int count = Count;
      if (count == 1 && this[0] is Paragraph)
      {
        // Omit keyword if paragraph has no attributes set.
        Paragraph paragraph = (Paragraph)this[0];
        if (paragraph.Style == "" && paragraph.IsNull("Format"))
        {
          paragraph.SerializeContentOnly = true;
          paragraph.Serialize(serializer);
          paragraph.SerializeContentOnly = false;
          return;
        }
      }
      for (int index = 0; index < count; index++)
      {
        DocumentObject documentElement = this[index];
        documentElement.Serialize(serializer);
      }
    }

    /// <summary>
    /// Allows the visitor object to visit the document object and it's child objects.
    /// </summary>
    void IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, bool visitChildren)
    {
      visitor.VisitDocumentElements(this);

      foreach (DocumentObject docObject in this)
      {
        if (docObject is IVisitable)
          ((IVisitable)docObject).AcceptVisitor(visitor, visitChildren);
      }
    }

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