#region PDFsharp Charting - A .NET charting library based on PDFsharp
//
// Authors:
//   Niklas Schneider (mailto:Niklas.Schneider@pdfsharp.com)
//
// Copyright (c) 2005-2007 empira Software GmbH, Cologne (Germany)
//
// http://www.pdfsharp.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 PdfSharp.Drawing;

namespace PdfSharp.Charting.Renderers
{
	/// <summary>
	/// Provides functions which converts Charting.DOM objects into PdfSharp.Drawing objects.
	/// </summary>
	internal class Converter
	{
    /// <summary>
    /// Creates a XFont based on the font. Missing attributes will be taken from the defaultFont
    /// parameter.
    /// </summary>
    internal static XFont ToXFont(Font font, XFont defaultFont)
    {
      XFont xfont = defaultFont;
      if (font != null)
      {
        string fontFamily = font.name;
        if (fontFamily == "")
          fontFamily = defaultFont.Name;

        XFontStyle fontStyle = defaultFont.Style;
        if (font.bold)
          fontStyle |= XFontStyle.Bold;
        if (font.italic)
          fontStyle |= XFontStyle.Italic;

        double size = font.size.Point; //emSize???
        if (size == 0)
          size = defaultFont.Size;

        xfont = new XFont(fontFamily, size, fontStyle);
      }
      return xfont;
    }

    /// <summary>
    /// Creates a XPen based on the specified line format. If not specified color and width will be taken
    /// from the defaultColor and defaultWidth parameter.
    /// </summary>
    internal static XPen ToXPen(LineFormat lineFormat, XColor defaultColor, double defaultWidth)
    {
      return ToXPen(lineFormat, defaultColor, defaultWidth, XDashStyle.Solid);
    }

    /// <summary>
    /// Creates a XPen based on the specified line format. If not specified color and width will be taken
    /// from the defaultPen parameter.
    /// </summary>
    internal static XPen ToXPen(LineFormat lineFormat, XPen defaultPen)
    {
      return ToXPen(lineFormat, defaultPen.Color, defaultPen.Width, defaultPen.DashStyle);
    }

    /// <summary>
    /// Creates a XPen based on the specified line format. If not specified color, width and dash style
    /// will be taken from the defaultColor, defaultWidth and defaultDashStyle parameters.
    /// </summary>
    internal static XPen ToXPen(LineFormat lineFormat, XColor defaultColor, double defaultWidth, XDashStyle defaultDashStyle)
    {
      XPen pen = null;
      if (lineFormat == null)
      {
        pen = new XPen(defaultColor, defaultWidth);
        pen.DashStyle = defaultDashStyle;
      }
      else
      {
        XColor color = defaultColor;
        if (!lineFormat.Color.IsEmpty)
          color = lineFormat.Color;

        double width = lineFormat.Width.Point;
        if (!lineFormat.Visible)
          width = 0;
        if (lineFormat.Visible && width == 0)
          width = defaultWidth;

        pen = new XPen(color, width);
        pen.DashStyle = lineFormat.dashStyle;
        pen.DashOffset = 10 * width;
      }
      return pen;
    }

    /// <summary>
    /// Creates a XBrush based on the specified fill format. If not specified, color will be taken
    /// from the defaultColor parameter.
    /// </summary>
    internal static XBrush ToXBrush(FillFormat fillFormat, XColor defaultColor)
    {
      if (fillFormat == null || fillFormat.color.IsEmpty)
        return new XSolidBrush(defaultColor);
      return new XSolidBrush(fillFormat.color);
    }

    /// <summary>
    /// Creates a XBrush based on the specified font color. If not specified, color will be taken
    /// from the defaultColor parameter.
    /// </summary>
    internal static XBrush ToXBrush(Font font, XColor defaultColor)
    {
      if (font == null || font.color.IsEmpty)
        return new XSolidBrush(defaultColor);
      return new XSolidBrush(font.color);
    }
  }
}
