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.Diagnostics;

namespace RSSCommon.Helper
{
	/// <summary>
	/// Helps with launching browser
	/// </summary>
	public class BrowserHelper
	{
		public static bool IsURLFile( string url )
		{
			return new Uri( url ).IsFile;
		}
		public static bool BrowseURL( string url )
		{
			if( null != url )
			{
				/*
				// Make sure this is not the preview XML file being browsed
				if( url.IndexOf( ApplicationSettings.ApplicationDataPath ) > 0 ) return false;

				// We are interested to browse only to HTTP URLs
				if( !url.StartsWith("http://") && !url.StartsWith("ftp://") && !url.StartsWith("mailto:") ) return false;
				*/
				using( Process p = Process.Start( new ProcessStartInfo( url ) ) )
				{
					
				}
				return true;
			}

			return false;
		}

		public static string GetDroppedURL(System.Windows.Forms.DragEventArgs e)
		{
			string hyperLinkUrl = null;
			string hyperLinkText = null;
			try
			{ 
				hyperLinkUrl = e.Data.GetData(typeof(string)) as string;
				// some browser deliver url and text
				// in UniformResourceLocator (Firebird)
				string[] tokens = hyperLinkUrl.Split('\\');
				if(tokens.Length>1)
				{
					hyperLinkUrl = tokens[0];
					hyperLinkText = tokens[1];
				}
					// we have to read FILEGROUPDESCRIPTOR to get the text (IE)
				else
				{
					System.IO.Stream ioStream=
						(System.IO.Stream)e.Data.GetData("FileGroupDescriptor");
					byte[] contents = new Byte[512];
					ioStream.Read(contents,0,512);
					ioStream.Close();
					System.Text.StringBuilder sb = new System.Text.StringBuilder();
					//The magic number 76 is the size of that part of the
					//FILEGROUPDESCRIPTOR structure before
					// the filename starts - cribbed
					//from another usenet post.
					for (int i=76; contents[i] != 0; i++)
					{
						sb.Append((char)contents[i]);
					}
					if (!sb.ToString(sb.Length-4,4).ToLower().Equals(".url"))
					{
						throw new Exception("filename does not end in '.url'");
					}
					hyperLinkText = sb.ToString(0,sb.Length-4);
				}
				// do what ever you wanna do with the hyperlink
				return hyperLinkUrl;
			}
			catch (System.Exception ex)
			{
				System.Diagnostics.Trace.WriteLine(ex.Message);
				return null;
			}
		}

		public static void DragEnter( System.Windows.Forms.DragEventArgs e )
		{
			if(e.Data.GetData("UniformResourceLocator",true)!=null)
			{
				e.Effect = System.Windows.Forms.DragDropEffects.Link;
			} 
			else
			{
				e.Effect = System.Windows.Forms.DragDropEffects.None;
			}
		}
	}
}