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A Code Project Article Editor with Live Preview

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5 Aug 2009CPOL5 min read 113.7K   3.9K   148  
A tool to help author articles at The Code Project
 
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using WeifenLuo.WinFormsUI.Docking;
using System.IO;
using BobBuilder.Command;
using System.Text.RegularExpressions;
using System.Threading;
using System.Diagnostics;

namespace BobBuilder
{
	internal partial class Browser : ContentBase
	{
		public Browser()
		{
			InitializeComponent();

			_Control.Navigating += HandleNavigating;
			_Control.DocumentCompleted += HandleDocumentCompleted;
		}

		public Browser( Document doc )
			: this()
		{
			Document = doc;

			Reload();
		}

		protected override void HandleTextChanged( object sender, Command.TextChanged command )
		{
			if ( Document != null && Document.Id == command.Document.Id ) Reload();
		}

		protected override void HandleRefreshAll( object sender, RefreshAll command )
		{
			Reload();
		}

		protected override void HandleGetTableOfContents( object sender, GetTableOfContents command )
		{
			if ( Document == null || Document.Id != command.Document.Id ) return;

			if ( command.OK ) return;

			if ( _Loading )
			{
				command.IsLoading = true;
				return;
			}

			command.TOC = "<h2>Table of Contents</h2>";

			command.OK = true;
		}

		protected override string TabTextDecoration
		{
			get
			{
				return ( Loading ? " ( loading )" : String.Empty );
			}
		}

		Point _ScrollPosition = new Point( 0, 0 );
		Point ScrollPosition { get { return _ScrollPosition; } }
		int ScrollPositionX { get { return _ScrollPosition.X; } set { _ScrollPosition.X = value; } }
		int ScrollPositionY { get { return _ScrollPosition.Y; } set { _ScrollPosition.Y = value; } }
		bool _Loading = false;
		bool Loading { get { return _Loading; } set { _Loading = value; UpdateTabText(); } }

		//static Regex _Img1 = new Regex( @"(?<src>\<\s*img\s*[^(src)]*\s+src\s*=\s*"")(?<path>[^:""]*)""", RegexOptions.Compiled | RegexOptions.IgnoreCase );
		//static Regex _Img2 = new Regex( @"(?<src>\<\s*img\s*[^(src)]*\s+src\s*=\s*)(?<path>[^:\s]*)\s", RegexOptions.Compiled | RegexOptions.IgnoreCase );
		static Regex _Head = new Regex( @"(?<head><\s*head[^>]*>)", RegexOptions.Compiled | RegexOptions.IgnoreCase );

		private void Reload()
		{
			SaveScrollPosition();

			string html = Document.Text;

			if ( !String.IsNullOrEmpty( Document.Filepath ) )
			{
				string dire = Path.GetDirectoryName( Document.Filepath );
				//html = _Img1.Replace( html, @"${src}file://" + dire + @"\${path}""" );
				//html = _Img2.Replace( html, @"${src}file://" + dire + @"\${path} " );
				html = _Head.Replace( html, @"${head}" + '\n' + @"<base href=""file://" + dire + @"\"" />" + '\n' );
			}

			if ( ScrollPositionX != 0 || ScrollPositionY != 0 )
			{
				string script =
					"\n\n<script type=\"text/javascript\">\n" +
					"function SetScrollPostition() {\nwindow.scrollTo( " + ScrollPositionX + ", " + ScrollPositionY + " );\n}\n" +
					"window.onload = SetScrollPostition;\n" +
					"</script>\n\n";

				html = html.Replace( "</body>", script + "</body>" );
			}

			Loading = true;
			_Control.DocumentText = html;
		}

		private void SaveScrollPosition()
		{
			if ( Loading ) return;

			var document = _Control.Document;
			if ( document == null ) return;

			var body = document.Body;
			if ( body == null ) return;

			if ( body.ScrollLeft != 0 || body.ScrollTop != 0 )
			{
				ScrollPositionX = body.ScrollLeft;
				ScrollPositionY = body.ScrollTop;
				return;
			}

			// for html with a DOC tag
			var htmls = document.GetElementsByTagName( "HTML" );
			if ( htmls == null ) return;
			if ( htmls.Count == 0 ) return;

			var html = htmls[ 0 ];
			if ( html == null ) return;

			if ( html.ScrollLeft != 0 || html.ScrollTop != 0 )
			{
				ScrollPositionX = html.ScrollLeft;
				ScrollPositionY = html.ScrollTop;
				return;
			}
		}

		void HandleNavigating( object sender, WebBrowserNavigatingEventArgs e )
		{
		}

		void HandleDocumentCompleted( object sender, WebBrowserDocumentCompletedEventArgs e )
		{
			if ( ScrollPositionX != 0 || ScrollPositionY != 0 )
				_Control.Document.Window.ScrollTo( ScrollPosition );

			Loading = _Control.IsBusy;
		}

		[Conditional( "NoSmileys" )]
		void NoSmileys()
		{
			string html = null;

			html = html.Replace( ":((", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_cry.gif' />" );
			html = html.Replace( ":)", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_smile.gif' />" );
			html = html.Replace( ":-)", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_smile.gif' />" );
			html = html.Replace( ":(", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_frown.gif' />" );
			html = html.Replace( ":-(", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_frown.gif' />" );
			html = html.Replace( ":-O", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_redface.gif' />" );
			html = html.Replace( ":-o", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_redface.gif' />" );
			html = html.Replace( ":-0", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_redface.gif' />" );
			html = html.Replace( ":-D", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_biggrin.gif' />" );
			html = html.Replace( ";)", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_wink.gif' />" );
			html = html.Replace( ";-)", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_wink.gif' />" );
			html = html.Replace( ":|", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_line.gif' />" );
			html = html.Replace( ":laugh:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_laugh.gif' />" );
			html = html.Replace( ":wtf:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_wtf.gif' />" );
			html = html.Replace( ":rose:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/rose.gif' />" );

			//html = html.Replace( ";p", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_tongue.gif' />" );
			html = html.Replace( ";P", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_tongue.gif' />" );
			html = html.Replace( ";-P", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_tongue.gif' />" );
			html = html.Replace( ":-P", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_tongue.gif' />" );

			html = html.Replace( ":~", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_squeamish.gif' />" );
			html = html.Replace( ":cool:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_cool.gif' />" );
			html = html.Replace( ":rolleyes:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_rolleyes.gif' />" );
			html = html.Replace( ":mad:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_mad.gif' />" );
			html = html.Replace( ":eek:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_eek.gif' />" );
			html = html.Replace( ":confused:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_confused.gif' />" );
			html = html.Replace( ":suss:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_suss.gif' />" );
			html = html.Replace( " X| ", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_dead.gif' />" );
			html = html.Replace( ":zzz:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_snore.gif' />" );
			html = html.Replace( ":omg:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_omg.gif' />" );
			html = html.Replace( ":beer:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/beer.gif' />" );

			html = html.Replace( ":jig:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/jig.gif' />" );
			html = html.Replace( ":^)", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_sniff.gif' />" );
			html = html.Replace( ":sigh:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_sigh.gif' />" );
			html = html.Replace( ":doh:", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_doh.gif' />" );
			html = html.Replace( ":-\\", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/smiley_shucks.gif' />" );

			//html = html.Replace( "?", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/coffee.gif' />" );
			//html = html.Replace( "?", "<img align='absmiddle' src='http://www.codeproject.com/script/Forums/Images/sheep.gif' />" );
		}
	}

}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Nicholas Butler
United Kingdom United Kingdom
I discovered C# and .NET 1.0 Beta 1 in late 2000 and loved them immediately.
I have been writing software professionally in C# ever since

In real life, I have spent 3 years travelling abroad,
I have held a UK Private Pilots Licence for 20 years,
and I am a PADI Divemaster.

I now live near idyllic Bournemouth in England.

I can work 'virtually' anywhere!

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Posted 31 Jan 2008

Article Copyright 2008 by Nicholas Butler
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