// --------------------------------------------------------------------------------------------------------------------

// <summary>

//   Code Expression Builder

// </summary>

// --------------------------------------------------------------------------------------------------------------------



namespace BlogEngine.Core.Compilation

{

    using System.CodeDom;

    using System.Web.Compilation;

    using System.Web.UI;



    /// <summary>

    /// Code Expression Builder

    /// </summary>

    /// <example>

    /// page.aspx:

    ///     &lt;asp:CheckBox id="chk1" runat="server" Text='&lt;%$ code: DateTime.Now %&gt;' /&gt;

    /// web.config:

    ///     &lt;compilation debug="true"&gt;

    ///         &lt;expressionBuilders&gt;

    ///             &lt;add expressionPrefix="code" type="WebApp.Compilation.CodeExpressionBuilder, WebApp" /&gt;

    ///         &lt;/expressionBuilders&gt;

    ///     &lt;/compilation&gt;

    /// </example>

    [ExpressionPrefix("Code")]

    [ExpressionEditor("BlogEngine.Core.Compilation.Design.CodeExpressionEditor, BlogEngine.Core")]

    public class CodeExpressionBuilder : ExpressionBuilder

    {

        #region Public Methods



        /// <summary>

        /// When overridden in a derived class, returns code that is used during page execution to obtain the evaluated expression.

        /// </summary>

        /// <param name="entry">

        /// The object that represents information about the property bound to by the expression.

        /// </param>

        /// <param name="parsedData">

        /// The object containing parsed data as returned by <see cref="M:System.Web.Compilation.ExpressionBuilder.ParseExpression(System.String,System.Type,System.Web.Compilation.ExpressionBuilderContext)"/>.

        /// </param>

        /// <param name="context">

        /// Contextual information for the evaluation of the expression.

        /// </param>

        /// <returns>

        /// A <see cref="T:System.CodeDom.CodeExpression"/> that is used for property assignment.

        /// </returns>

        public override CodeExpression GetCodeExpression(

            BoundPropertyEntry entry, object parsedData, ExpressionBuilderContext context)

        {

            return new CodeSnippetExpression(entry.Expression.Trim());

        }



        #endregion

    }

}