CssPageRule.cs :  » GUI » SharpVectorGraphics » SharpVectors » Dom » Css » C# / CSharp Open Source

using System;
using System.Text.RegularExpressions;

namespace SharpVectors.Dom.Css{
  /// <summary>
  /// The CSSPageRule interface represents a @page rule within a CSS style sheet. The @page rule is used to specify the dimensions, orientation, margins, etc. of a page box for paged media.
  /// </summary>
  /// <developer>niklas@protocol7.com</developer>
  /// <completed>80</completed>
  public class CssPageRule : CssRule, ICssPageRule
  {
    #region Static members
    private static Regex regex = new Regex(@"^@font-face");
    
    internal static CssRule Parse(ref string css, object parent, bool readOnly, string[] replacedStrings, CssStyleSheetType origin)
    {
      Match match = regex.Match(css);
      if(match.Success)
      {
        CssPageRule rule = new CssPageRule(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 CssPageRule
    /// </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 CssPageRule(Match match, object parent, bool readOnly, string[] replacedStrings, CssStyleSheetType origin) : base(parent, readOnly, replacedStrings, origin)
    {
      // TODO: selectorText = DeReplaceStrings(match.Groups["pageselector"].Value.Trim());
    }
    #endregion

    #region Implementation of ICssPageRule

    private string selectorText;
    /// <summary>
    /// The parsable textual representation of the page selector for the rule.
    /// </summary>
    /// <exception cref="DomException">SYNTAX_ERR: Raised if the specified CSS string value has a syntax error and is unparsable.</exception>
    /// <exception cref="DomException">NO_MODIFICATION_ALLOWED_ERR: Raised if this rule is readonly.</exception>
    public string SelectorText
    {
      get
      {
        return selectorText;
      }
      set
      {
        /*    SYNTAX_ERR: Raised if the specified CSS string value has a syntax error and is unparsable.*/
        if(ReadOnly) throw new DomException(DomExceptionType.NoModificationAllowedErr);

        selectorText = value;
      }
    }

    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.PageRule;
      }
    }
    #endregion
  }
}