.NET String Resources

// -- FILE ------------------------------------------------------------------
// name       : Localization.Web.cs
// project    : Itenso String Resources
// created    : Jani Giannoudis - 2012.03.21
// language   : c#
// environment: .NET 4.0
// copyright  : (c) 2004-2012 by Itenso GmbH, Switzerland
// --------------------------------------------------------------------------
using System;
using System.ComponentModel;
using System.Reflection;
using System.Web.UI;

namespace Itenso.Community.StringResources.ResStrings
{

	// ------------------------------------------------------------------------
	[Designer( typeof( LocalizationDesigner ) )]
	public class Localization : Control
	{

		// ----------------------------------------------------------------------
		public enum LocalizationSetup
		{
			Init,
			Load,
			PreRender,
		} // enum LocalizationSetup

		// ----------------------------------------------------------------------
		private class ObjectProperty
		{

			// --------------------------------------------------------------------
			public object Object { get; set; }

			// --------------------------------------------------------------------
			public PropertyInfo Property { get; set; }

		} // ObjectProperty

		// ----------------------------------------------------------------------
		public Localization()
		{
			ApplyOn = LocalizationSetup.Load;
		} // Localization

		// ----------------------------------------------------------------------
		[Themeable( false )]
		[Description( "Set the target control" )]
		public string TargetControl { get; set; }

		// ----------------------------------------------------------------------
		[Themeable( false )]
		[Description( "Set the target value" )]
		public string TargetValue { get; set; }

		// ----------------------------------------------------------------------
		[Themeable( false )]
		[Description( "Set the localization source type" )]
		public string SourceType { get; set; }

		// ----------------------------------------------------------------------
		[Themeable( false )]
		[Description( "Set the localization source value" )]
		public string SourceValue { get; set; }

		// ----------------------------------------------------------------------
		[Themeable( false )]
		[Description( "Set the localization setup phase" )]
		[DefaultValue( LocalizationSetup.Load )]
		public LocalizationSetup ApplyOn { get; set; }

		// ----------------------------------------------------------------------
		protected override void OnInit( EventArgs e )
		{
			base.OnInit( e );
			if ( ApplyOn == LocalizationSetup.Init )
			{
				Localize();
			}
		} // OnInit

		// ----------------------------------------------------------------------
		protected override void OnLoad( EventArgs e )
		{
			base.OnLoad( e );
			if ( ApplyOn == LocalizationSetup.Load )
			{
				Localize();
			}
		} // OnLoad

		// ----------------------------------------------------------------------
		protected override void OnPreRender( EventArgs e )
		{
			base.OnPreRender( e );
			if ( ApplyOn == LocalizationSetup.PreRender )
			{
				Localize();
			}
		} // OnPreRender

		// ----------------------------------------------------------------------
		private void Localize()
		{
			if ( !DesignMode && !string.IsNullOrEmpty( TargetControl ) && !string.IsNullOrEmpty( TargetValue ) &&
				!string.IsNullOrEmpty( SourceType ) && !string.IsNullOrEmpty( SourceValue ) )
			{
				Control control = Parent.FindControl( TargetControl );
				if ( control != null )
				{
					ObjectProperty objectProperty = FindObjectProperty( control, TargetValue );
					if ( objectProperty != null )
					{
						object localizedValue = StringsExpressionParser.Parse( SourceType, SourceValue );
						if ( localizedValue != null && objectProperty.Property.PropertyType.IsAssignableFrom( localizedValue.GetType() ) )
						{
							objectProperty.Property.SetValue( objectProperty.Object, localizedValue, null );
						}
					}
				}
			}
		} // Localize

		// ----------------------------------------------------------------------
		private static ObjectProperty FindObjectProperty( object source, string propertyName )
		{
			if ( source == null || string.IsNullOrEmpty( propertyName ) )
			{
				return null;
			}

			int childIndex = propertyName.IndexOf( '.' );
			if ( childIndex > 0 )
			{
				PropertyInfo childProperty = source.GetType().GetProperty( propertyName.Substring( 0, childIndex ), BindingFlags.Public | BindingFlags.Instance );
				if ( childProperty == null )
				{
					return null;
				}
				object childObject = childProperty.GetValue( source, null );
				return childObject == null ? null : FindObjectProperty( childObject, propertyName.Substring( childIndex + 1 ) );
			}

			PropertyInfo property = source.GetType().GetProperty( propertyName, BindingFlags.Public | BindingFlags.Instance );
			return property == null ? null : new ObjectProperty { Object = source, Property = property };
		} // FindObjectProperty

	} // class Localization

} // namespace Itenso.Community.StringResources.ResStrings
// -- EOF -------------------------------------------------------------------