#region MigraDoc - Creating Documents on the Fly
//
// Authors:
//   Stefan Lange
//   Klaus Potzesny
//   David Stephensen
//
// Copyright (c) 2001-2017 empira Software GmbH, Cologne Area (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.publics;

namespace MigraDoc.DocumentObjectModel.Fields
{
    /// <summary>
    /// InfoField is used to reference one of the DocumentInfo fields in the document.
    /// </summary>
    public class InfoField : DocumentObject
    {
        /// <summary>
        /// Initializes a new instance of the InfoField class.
        /// </summary>
        public InfoField()
        { }

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

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

        #region Properties
        /// <summary>
        /// Gets or sets the name of the information to be shown in the field.
        /// </summary>
        public string Name
        {
            get { return _name.Value; }
            set
            {
                if (IsValidName(value))
                    _name.Value = value;
                else
                    throw new ArgumentException(DomSR.InvalidInfoFieldName(value));
            }
        }
        [DV]
        public NString _name = NString.NullValue;
        #endregion

        /// <summary>
        /// Determines whether the name is a valid InfoFieldType.
        /// </summary>
        private bool IsValidName(string name)
        {
            // Check using a way that never throws an exception
#if SILVERLIGHT
      if (validNames == null)
      {
        validNames = new string[4];
        validNames[0] = "Title";
        validNames[1] = "Author";
        validNames[2] = "Keywords";
        validNames[3] = "Subject";
      }
#endif

            foreach (string validName in validNames)
            {
                if (String.Compare(validName, name, StringComparison.OrdinalIgnoreCase) == 0)
                    return true;
            }
            return false;
        }

#if SILVERLIGHT
    private static string[] validNames;
#else
        private static string[] validNames = Enum.GetNames(typeof(InfoFieldType));
#endif

        /// <summary>
        /// Determines whether this instance is null (not set).
        /// </summary>
        public override bool IsNull()
        {
            return false;
        }
        #region public
        /// <summary>
        /// Converts InfoField into DDL.
        /// </summary>
        public override void Serialize(Serializer serializer)
        {
            string str = "\\field(Info)";
            if (Name == "")
                throw new InvalidOperationException(DomSR.MissingObligatoryProperty("Name", "InfoField"));
            str += "[Name = \"" + Name + "\"]";

            serializer.Write(str);
        }

        /// <summary>
        /// Returns the meta object of this instance.
        /// </summary>
        public override Meta Meta
        {
            get { return _meta ?? (_meta = new Meta(typeof(InfoField))); }
        }
        static Meta _meta;
        #endregion
    }
}
