RSS Feed Aggregator and Blogging Smart Client

// Copyright � 2005 by Omar Al Zabir. All rights are reserved.
// 
// If you like this code then feel free to go ahead and use it.
// The only thing I ask is that you don't remove or alter my copyright notice.
//
// Your use of this software is entirely at your own risk. I make no claims or
// warrantees about the reliability or fitness of this code for any particular purpose.
// If you make changes or additions to this code please mark your code as being yours.
// 
// website http://www.oazabir.com, email OmarAlZabir@gmail.com, msn oazabir@hotmail.com
using System;
using System.Drawing;
using System.Diagnostics;
using System.Windows.Forms;
using System.Text;
using System.Text.RegularExpressions;

using mshtml;
using DHTMLEDLib;
using AxDHTMLEDLib;
using System.Collections;

namespace RSSBlogAPI
{
	/// <summary>
	/// HTML Editor Control
	/// </summary>
	internal class HtmlEditor : AxDHTMLEdit
	{
		private ColorDialog _ColorSelectionDialog;
		
		public HtmlEditor()
		{
			this._ColorSelectionDialog = new ColorDialog();
		}

		#region Commands

		public void Bold()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_BOLD, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void Underline()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_UNDERLINE, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void Italic()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_ITALIC, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void InsertHyperlink( )
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_HYPERLINK, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void InsertImage()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_IMAGE, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void InsertImage( string url )
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_IMAGE, OLECMDEXECOPT.OLECMDEXECOPT_DONTPROMPTUSER, ref nullArg );
		}

		public void Cut()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_CUT, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}
		
		public void Copy()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_COPY, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void Paste()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_PASTE, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void JustifyLeft()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_JUSTIFYLEFT, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void JustifyCenter()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_JUSTIFYCENTER, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void JustifyRight()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_JUSTIFYRIGHT, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void JustifyFull()
		{
			string selection = this.SelectedHtml;
			Regex rx = new Regex( "<p[^>]*>", RegexOptions.IgnoreCase );
			selection = rx.Replace( selection, "<p align=\"justify\">" );
			this.SelectedHtml = selection;
		}

		public void Undo()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_UNDO, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void Redo()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_REDO, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void Indent()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_INDENT, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void Outdent()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_OUTDENT, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void OrderList()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_ORDERLIST, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void UnorderList()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_UNORDERLIST, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void RemoveFormat()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_REMOVEFORMAT, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void RemoveLink()
		{
			object nullArg = null;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_UNLINK, OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT, ref nullArg );
		}

		public void SetColor()
		{
			if ( DialogResult.OK == this._ColorSelectionDialog.ShowDialog( this ) )
				SetColor( ColorTranslator.ToHtml( this._ColorSelectionDialog.Color ) );
		}

		public void SetColor( string htmlColor )
		{
			object arg = htmlColor;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_SETFORECOLOR, OLECMDEXECOPT.OLECMDEXECOPT_DONTPROMPTUSER, ref arg );
		}

		public void SetFont( string font )
		{
			object arg = font;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_SETFONTNAME, OLECMDEXECOPT.OLECMDEXECOPT_DONTPROMPTUSER, ref arg );
		}

		public void SetSize( int size )
		{
			object arg = size;
			this.ExecCommand( DHTMLEDITCMDID.DECMD_SETFONTSIZE, OLECMDEXECOPT.OLECMDEXECOPT_DONTPROMPTUSER, ref arg );
		}

		#endregion

		#region Selection Processing

		public string SelectedText
		{
			get
			{
				IHTMLSelectionObject selection = this.DOM.selection;
				if ( selection.type == "Text" )
				{
					IHTMLTxtRange range  = selection.createRange() as IHTMLTxtRange;
					range.select();
					return range.text;
				}

				return string.Empty;
			}
			set
			{
				IHTMLSelectionObject selection = this.DOM.selection;

				if ( selection.type != "Control" )
				{
					IHTMLTxtRange range  = selection.createRange() as IHTMLTxtRange;
					range.select();
					range.text = value;
				}
				else
				{
					IHTMLControlRange range = selection.createRange() as IHTMLControlRange;
					range.item(0).outerText = value;
				}
			}
		}

		public string SelectedHtml
		{
			get
			{
				IHTMLSelectionObject selection = this.DOM.selection;

				if ( selection.type == "Text" || selection.type == "None"  )
				{
					IHTMLTxtRange range  = selection.createRange() as IHTMLTxtRange;
					range.select();
					return range.htmlText;
				}
				else if ( selection.type == "Control" )
				{
					IHTMLControlRange range  = selection.createRange() as IHTMLControlRange;
					range.select();
					return range.item(0).outerHTML;
				}

				return string.Empty;
			}
			set
			{
				IHTMLSelectionObject selection = this.DOM.selection;

				if ( selection.type != "Control" )
				{
					IHTMLTxtRange range  = selection.createRange() as IHTMLTxtRange;
					range.select();
					range.pasteHTML( value );
				}
				else
				{
					IHTMLControlRange range = selection.createRange() as IHTMLControlRange;
					range.item(0).outerHTML = value;
				}
			}
		}

		#endregion
	}
}