source: branches/HeuristicLab.Problems.GrammaticalOptimization/SharpVectorCss/Css/CssFontFaceRule.cs @ 13949

// <developer>niklas@protocol7.com</developer>
// <completed>80</completed>

using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;

namespace SharpVectors.Dom.Css
{
  /// <summary>
  /// The CSSFontFaceRule interface represents a @font-face rule in a CSS style sheet. The @font-face rule is used to hold a set of font descriptions.
  /// </summary>
  public class CssFontFaceRule : CssRule, ICssFontFaceRule
  {
    #region Static members

    private static Regex regex = new Regex(@"^@font-face");
    
    /// <summary>
    /// Parses a string containging CSS and creates a CssFontFaceRule instance if found as the first content
    /// </summary>
    internal static CssRule Parse(ref string css, object parent, bool readOnly,
            IList<string> replacedStrings, CssStyleSheetType origin)
    {
      Match match = regex.Match(css);
      if(match.Success)
      {
        CssFontFaceRule rule = new CssFontFaceRule(match, parent, readOnly, 
                    replacedStrings, origin);
        css = css.Substring(match.Length);

        rule.style = new CssStyleDeclaration(ref css, rule, true, origin);

        return rule;
      }
      else
      {
        // didn't match => do nothing
        return null;
      }
    }

    #endregion

    #region Constructors
    /// <summary>
    /// The constructor for CssFontFaceRule
    /// </summary>
    /// <param name="match">The Regex match that found the charset rule</param>
    /// <param name="parent">The parent rule or parent stylesheet</param>
    /// <param name="readOnly">True if this instance is readonly</param>
    /// <param name="replacedStrings">An array of strings that have been replaced in the string used for matching. These needs to be put back use the DereplaceStrings method</param>
    /// <param name="origin">The type of CssStyleSheet</param>
    internal CssFontFaceRule(Match match, object parent, bool readOnly,
            IList<string> replacedStrings, CssStyleSheetType origin)
            : base(parent, true, replacedStrings, origin)
    {
      // always read-only
      
    }
    #endregion

    #region Implementation of ICssFontFaceRule
    private CssStyleDeclaration style;
    /// <summary>
    /// The declaration-block of this rule.
    /// </summary>
    public ICssStyleDeclaration Style
    {
      get
      {
        return style;
      }
    }
    #endregion

    #region Implementation of ICssRule
    /// <summary>
    /// The type of the rule. The expectation is that binding-specific casting methods can be used to cast down from an instance of the CSSRule interface to the specific derived interface implied by the type.
    /// </summary>
    public override CssRuleType Type
    {
      get
      {
        return CssRuleType.FontFaceRule;
      }
    }
    #endregion
  }
}