WF4 Custom activities for message mediation

//*****************************************************************************
//    Description.....Library of the activities 
//                                
//    Author..........Roman Kiss, rkiss@pathcom.com
//    Copyright © 2005 ATZ Consulting Inc. (see included license.rtf file)         
//                        
//    Date Created:    04/04/09
//
//    Date        Modified By     Description
//-----------------------------------------------------------------------------
//    04/04/09    Roman Kiss     Initial Revision
//
//*****************************************************************************
//

#region Namespaces
using System;
using System.Collections.Generic;
using System.ServiceModel.Dispatcher;
using System.Windows.Forms;
#endregion

namespace RKiss.MessageMediationActivityLibrary.Design.Dialogs.UserControls
{
    
    public partial class XpathUserControl : UserControl
    {
        public event StatusEventHandler RaiseEventOnStatus;
        public delegate void StatusEventHandler(object sender, StatusEventArgs args);

        #region Constructor
        public XpathUserControl()
        {
            InitializeComponent();
            this.xmlNotepadPanelControl1.XmlNotepadForm.ExpandAll();

            this.xmlNotepadPanelControl1.XmlNotepadForm.XmlTreeView.SelectionChanged += delegate(object source, EventArgs args)
            {
                this.textBoxXPathGenerator.Text = this.xmlNotepadPanelControl1.XmlNotepadForm.XPathSelectedNode;
            };
        }
        #endregion

        #region Cleanup
        protected override void DestroyHandle()
        {
            this.Cleanup();          
            base.DestroyHandle();
        }
        
        public void Cleanup()
        {
            this.ClearXmlDocument();
            this.xmlNotepadPanelControl1.Close();
        }
        public void ClearXmlDocument()
        {
            this.xmlNotepadPanelControl1.XmlNotepadForm.ClearXmlDocument();
        }
        #endregion

        #region Properties
        public string XPath
        {
            get { return this.textBoxXPathInput.Text.Trim(); }
            set { this.textBoxXPathInput.Text = value; }
        }

        public string XmlDocument
        {
            get { return this.xmlNotepadPanelControl1.XmlNotepadForm.GetCurrentXmlDocument; }
            set { this.xmlNotepadPanelControl1.XmlNotepadForm.LoadXmlDocument(value); }
        }
        public Dictionary<string, string> Namespaces
        {
            get
            {
                Dictionary<string, string> namespaces = new Dictionary<string, string>();
                foreach (DataGridViewRow row in this.dataGridViewNamespaces.Rows)
                {
                    string prefix = (string)row.Cells[0].Value;
                    string ns = (string)row.Cells[1].Value;
                    if (string.IsNullOrEmpty(prefix) || string.IsNullOrEmpty(ns)) continue;
                    namespaces.Add(prefix, ns);
                }
                return namespaces;
            }
            set
            {
                this.dataGridViewNamespaces.Rows.Clear();
                if (value != null)
                {                   
                    foreach (var item in value)
                    {
                        this.dataGridViewNamespaces.Rows.Add(new object[] { item.Key, item.Value });
                    }
                }
            }
        }
        #endregion    

        #region Public
        public void SelectXmlNode()
        {
            this.SelectXmlNode(this.textBoxXPathInput.Text);
        }
        public void SelectXmlNode(string xpath)
        {
            this.FindXmlNode(xpath);
        }
        #endregion

        #region Events
        private void clearAllToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.dataGridViewNamespaces.Rows.Clear();
        }
        private void textBoxXPathGenerator_DoubleClick(object sender, EventArgs e)
        {
            this.textBoxXPathInput.Text = this.textBoxXPathGenerator.Text;
        }
        private void textBoxXPathInput_TextChanged(object sender, EventArgs e)
        {
            this.SelectXmlNode();
        }
        private void textBoxXPathGenerator_MouseLeave(object sender, EventArgs e)
        {
            this.Cursor = Cursors.Default;
        }
        private void textBoxXPathGenerator_MouseHover(object sender, EventArgs e)
        {
            this.Cursor = Cursors.Hand;
        }
        private void textBoxXPathGenerator_MouseEnter(object sender, EventArgs e)
        {
            this.Cursor = Cursors.Hand;
        }
        private void textBoxXPathInput_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == (char)Keys.Enter)
            {
                this.FindXmlNode(this.textBoxXPathInput.SelectionLength > 0 ? this.textBoxXPathInput.SelectedText : this.textBoxXPathInput.Text);
            }
            //else if (e.KeyChar == '/' || e.KeyChar == '[' || e.KeyChar == ']')
            //{
            //    this.textBoxXPathInput.ForeColor = Color.Black;
            //}
            //else
            //{
            //    this.textBoxXPathInput.ForeColor = Color.Blue;
            //}
        }
        private void textBoxXPathInput_DoubleClick(object sender, EventArgs e)
        {
            this.SelectXmlNode();
        }
        #endregion

        #region Helpers
        private void FindXmlNode(string xpath)
        {
            if (string.IsNullOrEmpty(xpath) == false)
            {
                string msg = string.Empty;
                try
                {
                    // custom namespaces
                    XPathMessageContext context = new XPathMessageContext();
                    foreach (DataGridViewRow row in this.dataGridViewNamespaces.Rows)
                    {
                        string prefix = (string)row.Cells[0].Value;
                        string ns = (string)row.Cells[1].Value;
                        if (string.IsNullOrEmpty(prefix) || string.IsNullOrEmpty(ns)) continue;
                        context.AddNamespace(prefix, ns);
                    }

                    if (string.IsNullOrEmpty(this.XmlDocument) == false)
                    {
                        // search document
                        this.xmlNotepadPanelControl1.XmlNotepadForm.XPathSelectNode(xpath, context);
                    }
                    else
                    {
                        // check xpath expression only
                        XPathMessageFilter filter = new XPathMessageFilter(xpath, context);
                    }
                    msg = "OK";
                }
                catch (Exception ex)
                {
                    msg = ex.InnerException != null ? ex.InnerException.Message : ex.Message;
                    this.xmlNotepadPanelControl1.XmlNotepadForm.XPathSelectNode(null, null);
                }
                finally
                {
                    if (this.RaiseEventOnStatus != null)
                    {
                        this.RaiseEventOnStatus(this, new StatusEventArgs() { Status = msg });
                    }
                }
            }
        }
        #endregion       
    }

    #region EventArgs
    public class StatusEventArgs : EventArgs
    {
        public string Status { get; set; }
    }
    #endregion
}