#region MigraDoc - Creating Documents on the Fly
//
// Authors:
//   Klaus Potzesny (mailto:Klaus.Potzesny@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 MigraDoc.DocumentObjectModel;
using MigraDoc.DocumentObjectModel.Internals;
using MigraDoc.DocumentObjectModel.Tables;

namespace MigraDoc.RtfRendering
{
  /// <summary>
  /// Class to render a Paragraph to RTF.
  /// </summary>
  internal class ParagraphRenderer : StyleAndFormatRenderer
  {
    public ParagraphRenderer(DocumentObject domObj, RtfDocumentRenderer docRenderer)
      : base(domObj, docRenderer)
    {
      this.paragraph = domObj as Paragraph;
    }

    /// <summary>
    /// Renders the paragraph to RTF.
    /// </summary>
    internal override void Render()
    {
      useEffectiveValue = true;
      DocumentElements elements = DocumentRelations.GetParent(this.paragraph) as DocumentElements;

      this.rtfWriter.WriteControl("pard");
      bool isCellParagraph = DocumentRelations.GetParent(elements) is Cell;
      bool isFootnoteParagraph = isCellParagraph ? false : DocumentRelations.GetParent(elements) is Footnote;

      if (isCellParagraph)
        this.rtfWriter.WriteControl("intbl");

      RenderStyleAndFormat();
      if (!this.paragraph.IsNull("Elements"))
        RenderContent();
      EndStyleAndFormatAfterContent();

      if ((!isCellParagraph && !isFootnoteParagraph) || this.paragraph != elements.LastObject)
        this.rtfWriter.WriteControl("par");
    }

    /// <summary>
    /// Renders the paragraph content to RTF.
    /// </summary>
    private void RenderContent()
    {
      DocumentElements elements = DocumentRelations.GetParent(this.paragraph) as DocumentElements;
      //First paragraph of a footnote writes the reference symbol:
      if (DocumentRelations.GetParent(elements) is Footnote && this.paragraph == elements.First)
      {
        FootnoteRenderer ftntRenderer = new FootnoteRenderer(DocumentRelations.GetParent(elements) as Footnote, this.docRenderer);
        ftntRenderer.RenderReference();
      }
      foreach (DocumentObject docObj in this.paragraph.Elements)
      {
        if (docObj == paragraph.Elements.LastObject)
        {
          if (docObj is Character)
          {
            if (((Character)docObj).SymbolName == SymbolName.LineBreak)
              continue; //Ignore last linebreak.
          }
        }
        RendererBase rndrr = RendererFactory.CreateRenderer(docObj, this.docRenderer);
        if (rndrr != null)
          rndrr.Render();
      }
    }
    Paragraph paragraph;
  }
}
