Check Help Links Tool

using System;
using System.Drawing;
using System.Collections;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Windows.Forms;
using System.IO;
using System.Diagnostics;

using mshtml;

using HtmlHelp;
using HtmlHelp.ChmDecoding;

using Common;

namespace CheckHelpLinks
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.ToolBarButton toolBarButtonFileOpen;
		private System.Windows.Forms.MenuItem menuItemFile;
		private System.Windows.Forms.MenuItem menuItemFileOpen;
		private System.ComponentModel.IContainer components;
		private System.Windows.Forms.MenuItem menuItemFileExit;
		private System.Windows.Forms.MainMenu mainMenu;
		private System.Windows.Forms.ToolBar toolBar;
		private System.Windows.Forms.ImageList imageList;
		private System.Windows.Forms.ImageList imageListState;
		private System.Windows.Forms.ToolBarButton toolBarButtonWork;
		private System.Windows.Forms.ToolBarButton toolBarSeparator1;
		private System.Windows.Forms.TreeView _TreeView;
		private System.Windows.Forms.ToolBarButton toolBarButtonViewRefresh;
		private System.Windows.Forms.MenuItem menuItemFileWork;
		private System.Windows.Forms.MenuItem menuItemViewRefresh;
		private System.Windows.Forms.MenuItem menuSeparator1;
		private System.Windows.Forms.MenuItem menuItemView;
		private System.Windows.Forms.MenuItem menuItemViewBrowser;
		private System.Windows.Forms.MenuItem menuItemViewExpand;
		private System.Windows.Forms.MenuItem menuItemViewPage;
		private System.Windows.Forms.ToolBarButton toolBarButtonFast;
		private System.Windows.Forms.MenuItem menuItemFileExport;
		private System.Windows.Forms.MenuItem menuSeparator2;
		private System.Windows.Forms.MenuItem menuItem1;
		private System.Windows.Forms.MenuItem menuItemEditFind;
		private System.Windows.Forms.MenuItem menuItemEditFindNext;
		private System.Windows.Forms.MenuItem menuItemEditFindPrevious;
		private System.Windows.Forms.MenuItem menuItem2;
		private System.Windows.Forms.MenuItem menuItemModeFast;
		private System.Windows.Forms.MenuItem menuItemModeSlow;
		private System.Windows.Forms.MenuItem menuItemEditCopy;
		private System.Windows.Forms.MenuItem menuItem4;

		private static string[] _Args = null;

		private RecentFileList _RecentFileList = new RecentFileList();
		private string _Filename = null;
		private bool _Refresh = false;

		private HtmlHelpSystem _Reader = null;
		private All _All = null;
		private System.Windows.Forms.MenuItem menuItemViewSource;

		private Find _Find = null;

		public Form1()
		{
			InitializeComponent();

			Settings.DefaultRegistrySettingsPath = Global.RegistrySettingsPath;

			_RecentFileList.RegistryKey = Global.RegistryRecentFilesPath;
			_RecentFileList.FileMenu = menuItemFile;
			_RecentFileList.FileMenuPosition = 6;
			_RecentFileList.OnMenuClick += new RecentFileList.MenuClickEventHandler( OnRecentFileClick );

			Global.FastParse = Global.FastMode.Bool;
			SetFastToolTip();
			SetFastChecks();

			_Find = new Find();
			_Find.LoadFromRegistry();
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
			this.mainMenu = new System.Windows.Forms.MainMenu();
			this.menuItemFile = new System.Windows.Forms.MenuItem();
			this.menuItemFileOpen = new System.Windows.Forms.MenuItem();
			this.menuItemViewRefresh = new System.Windows.Forms.MenuItem();
			this.menuItemFileWork = new System.Windows.Forms.MenuItem();
			this.menuSeparator1 = new System.Windows.Forms.MenuItem();
			this.menuItemFileExport = new System.Windows.Forms.MenuItem();
			this.menuSeparator2 = new System.Windows.Forms.MenuItem();
			this.menuItemFileExit = new System.Windows.Forms.MenuItem();
			this.menuItem1 = new System.Windows.Forms.MenuItem();
			this.menuItemEditCopy = new System.Windows.Forms.MenuItem();
			this.menuItem4 = new System.Windows.Forms.MenuItem();
			this.menuItemEditFind = new System.Windows.Forms.MenuItem();
			this.menuItemEditFindNext = new System.Windows.Forms.MenuItem();
			this.menuItemEditFindPrevious = new System.Windows.Forms.MenuItem();
			this.menuItem2 = new System.Windows.Forms.MenuItem();
			this.menuItemModeFast = new System.Windows.Forms.MenuItem();
			this.menuItemModeSlow = new System.Windows.Forms.MenuItem();
			this.menuItemView = new System.Windows.Forms.MenuItem();
			this.menuItemViewExpand = new System.Windows.Forms.MenuItem();
			this.menuItemViewPage = new System.Windows.Forms.MenuItem();
			this.menuItemViewBrowser = new System.Windows.Forms.MenuItem();
			this.menuItemViewSource = new System.Windows.Forms.MenuItem();
			this.toolBar = new System.Windows.Forms.ToolBar();
			this.toolBarButtonFileOpen = new System.Windows.Forms.ToolBarButton();
			this.toolBarButtonViewRefresh = new System.Windows.Forms.ToolBarButton();
			this.toolBarButtonWork = new System.Windows.Forms.ToolBarButton();
			this.toolBarSeparator1 = new System.Windows.Forms.ToolBarButton();
			this.toolBarButtonFast = new System.Windows.Forms.ToolBarButton();
			this.imageList = new System.Windows.Forms.ImageList(this.components);
			this.imageListState = new System.Windows.Forms.ImageList(this.components);
			this._TreeView = new System.Windows.Forms.TreeView();
			this.SuspendLayout();
			// 
			// mainMenu
			// 
			this.mainMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					 this.menuItemFile,
																					 this.menuItem1,
																					 this.menuItem2,
																					 this.menuItemView});
			// 
			// menuItemFile
			// 
			this.menuItemFile.Index = 0;
			this.menuItemFile.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																						 this.menuItemFileOpen,
																						 this.menuItemViewRefresh,
																						 this.menuItemFileWork,
																						 this.menuSeparator1,
																						 this.menuItemFileExport,
																						 this.menuSeparator2,
																						 this.menuItemFileExit});
			this.menuItemFile.Text = "&File";
			this.menuItemFile.Popup += new System.EventHandler(this.menuItemFile_Popup);
			// 
			// menuItemFileOpen
			// 
			this.menuItemFileOpen.Index = 0;
			this.menuItemFileOpen.Shortcut = System.Windows.Forms.Shortcut.CtrlO;
			this.menuItemFileOpen.Text = "&Open...";
			this.menuItemFileOpen.Click += new System.EventHandler(this.menuItemFileOpen_Click);
			// 
			// menuItemViewRefresh
			// 
			this.menuItemViewRefresh.Index = 1;
			this.menuItemViewRefresh.Shortcut = System.Windows.Forms.Shortcut.F5;
			this.menuItemViewRefresh.Text = "&Refresh";
			this.menuItemViewRefresh.Click += new System.EventHandler(this.menuItemViewRefresh_Click);
			// 
			// menuItemFileWork
			// 
			this.menuItemFileWork.Index = 2;
			this.menuItemFileWork.Shortcut = System.Windows.Forms.Shortcut.CtrlW;
			this.menuItemFileWork.Text = "&Work";
			this.menuItemFileWork.Click += new System.EventHandler(this.menuItemFileWork_Click);
			// 
			// menuSeparator1
			// 
			this.menuSeparator1.Index = 3;
			this.menuSeparator1.Text = "-";
			// 
			// menuItemFileExport
			// 
			this.menuItemFileExport.Index = 4;
			this.menuItemFileExport.Shortcut = System.Windows.Forms.Shortcut.CtrlX;
			this.menuItemFileExport.Text = "E&xport Results...";
			this.menuItemFileExport.Click += new System.EventHandler(this.menuItemFileExport_Click);
			// 
			// menuSeparator2
			// 
			this.menuSeparator2.Index = 5;
			this.menuSeparator2.Text = "-";
			// 
			// menuItemFileExit
			// 
			this.menuItemFileExit.Index = 6;
			this.menuItemFileExit.Text = "E&xit";
			this.menuItemFileExit.Click += new System.EventHandler(this.menuItemFileExit_Click);
			// 
			// menuItem1
			// 
			this.menuItem1.Index = 1;
			this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItemEditCopy,
																					  this.menuItem4,
																					  this.menuItemEditFind,
																					  this.menuItemEditFindNext,
																					  this.menuItemEditFindPrevious});
			this.menuItem1.Text = "&Edit";
			// 
			// menuItemEditCopy
			// 
			this.menuItemEditCopy.Index = 0;
			this.menuItemEditCopy.Shortcut = System.Windows.Forms.Shortcut.CtrlC;
			this.menuItemEditCopy.Text = "&Copy link";
			this.menuItemEditCopy.Click += new System.EventHandler(this.menuItemEditCopy_Click);
			// 
			// menuItem4
			// 
			this.menuItem4.Index = 1;
			this.menuItem4.Text = "-";
			// 
			// menuItemEditFind
			// 
			this.menuItemEditFind.Index = 2;
			this.menuItemEditFind.Shortcut = System.Windows.Forms.Shortcut.CtrlF;
			this.menuItemEditFind.Text = "&Find...";
			this.menuItemEditFind.Click += new System.EventHandler(this.menuItemEditFind_Click);
			// 
			// menuItemEditFindNext
			// 
			this.menuItemEditFindNext.Index = 3;
			this.menuItemEditFindNext.Shortcut = System.Windows.Forms.Shortcut.F3;
			this.menuItemEditFindNext.Text = "Find &Next";
			this.menuItemEditFindNext.Click += new System.EventHandler(this.menuItemEditFindNext_Click);
			// 
			// menuItemEditFindPrevious
			// 
			this.menuItemEditFindPrevious.Index = 4;
			this.menuItemEditFindPrevious.Shortcut = System.Windows.Forms.Shortcut.ShiftF3;
			this.menuItemEditFindPrevious.Text = "Find &Previous";
			this.menuItemEditFindPrevious.Click += new System.EventHandler(this.menuItemEditFindPrevious_Click);
			// 
			// menuItem2
			// 
			this.menuItem2.Index = 2;
			this.menuItem2.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItemModeFast,
																					  this.menuItemModeSlow});
			this.menuItem2.Text = "&Mode";
			// 
			// menuItemModeFast
			// 
			this.menuItemModeFast.Index = 0;
			this.menuItemModeFast.Shortcut = System.Windows.Forms.Shortcut.CtrlQ;
			this.menuItemModeFast.Text = "&Fast";
			this.menuItemModeFast.Click += new System.EventHandler(this.menuItemModeFast_Click);
			// 
			// menuItemModeSlow
			// 
			this.menuItemModeSlow.Index = 1;
			this.menuItemModeSlow.Shortcut = System.Windows.Forms.Shortcut.CtrlS;
			this.menuItemModeSlow.Text = "&Slow";
			this.menuItemModeSlow.Click += new System.EventHandler(this.menuItemModeSlow_Click);
			// 
			// menuItemView
			// 
			this.menuItemView.Index = 3;
			this.menuItemView.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																						 this.menuItemViewExpand,
																						 this.menuItemViewPage,
																						 this.menuItemViewBrowser,
																						 this.menuItemViewSource});
			this.menuItemView.Text = "&View";
			// 
			// menuItemViewExpand
			// 
			this.menuItemViewExpand.Index = 0;
			this.menuItemViewExpand.Shortcut = System.Windows.Forms.Shortcut.CtrlE;
			this.menuItemViewExpand.Text = "&Expand All";
			this.menuItemViewExpand.Click += new System.EventHandler(this.menuItemViewExpand_Click);
			// 
			// menuItemViewPage
			// 
			this.menuItemViewPage.Index = 1;
			this.menuItemViewPage.Shortcut = System.Windows.Forms.Shortcut.CtrlZ;
			this.menuItemViewPage.Text = "&Page";
			this.menuItemViewPage.Click += new System.EventHandler(this.menuItemViewPage_Click);
			// 
			// menuItemViewBrowser
			// 
			this.menuItemViewBrowser.Index = 2;
			this.menuItemViewBrowser.Shortcut = System.Windows.Forms.Shortcut.CtrlB;
			this.menuItemViewBrowser.Text = "&Browser";
			this.menuItemViewBrowser.Click += new System.EventHandler(this.menuItemViewBrowser_Click);
			// 
			// menuItemViewSource
			// 
			this.menuItemViewSource.Index = 3;
			this.menuItemViewSource.Shortcut = System.Windows.Forms.Shortcut.CtrlA;
			this.menuItemViewSource.Text = "&Source";
			this.menuItemViewSource.Click += new System.EventHandler(this.menuItemViewSource_Click);
			// 
			// toolBar
			// 
			this.toolBar.Buttons.AddRange(new System.Windows.Forms.ToolBarButton[] {
																					   this.toolBarButtonFileOpen,
																					   this.toolBarButtonViewRefresh,
																					   this.toolBarButtonWork,
																					   this.toolBarSeparator1,
																					   this.toolBarButtonFast});
			this.toolBar.DropDownArrows = true;
			this.toolBar.ImageList = this.imageList;
			this.toolBar.Location = new System.Drawing.Point(0, 0);
			this.toolBar.Name = "toolBar";
			this.toolBar.ShowToolTips = true;
			this.toolBar.Size = new System.Drawing.Size(592, 28);
			this.toolBar.TabIndex = 9;
			this.toolBar.ButtonClick += new System.Windows.Forms.ToolBarButtonClickEventHandler(this.toolBar_ButtonClick);
			// 
			// toolBarButtonFileOpen
			// 
			this.toolBarButtonFileOpen.ImageIndex = 0;
			this.toolBarButtonFileOpen.ToolTipText = "Open File";
			// 
			// toolBarButtonViewRefresh
			// 
			this.toolBarButtonViewRefresh.ImageIndex = 1;
			this.toolBarButtonViewRefresh.ToolTipText = "Refresh";
			// 
			// toolBarButtonWork
			// 
			this.toolBarButtonWork.ImageIndex = 2;
			this.toolBarButtonWork.ToolTipText = "Work";
			// 
			// toolBarSeparator1
			// 
			this.toolBarSeparator1.Style = System.Windows.Forms.ToolBarButtonStyle.Separator;
			// 
			// toolBarButtonFast
			// 
			this.toolBarButtonFast.ImageIndex = 3;
			this.toolBarButtonFast.Style = System.Windows.Forms.ToolBarButtonStyle.ToggleButton;
			this.toolBarButtonFast.ToolTipText = "Toggle Fast Parsing";
			// 
			// imageList
			// 
			this.imageList.ImageSize = new System.Drawing.Size(16, 16);
			this.imageList.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imageList.ImageStream")));
			this.imageList.TransparentColor = System.Drawing.Color.Transparent;
			// 
			// imageListState
			// 
			this.imageListState.ImageSize = new System.Drawing.Size(16, 16);
			this.imageListState.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imageListState.ImageStream")));
			this.imageListState.TransparentColor = System.Drawing.Color.Transparent;
			// 
			// _TreeView
			// 
			this._TreeView.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
				| System.Windows.Forms.AnchorStyles.Left) 
				| System.Windows.Forms.AnchorStyles.Right)));
			this._TreeView.FullRowSelect = true;
			this._TreeView.HideSelection = false;
			this._TreeView.ImageList = this.imageListState;
			this._TreeView.Location = new System.Drawing.Point(8, 32);
			this._TreeView.Name = "_TreeView";
			this._TreeView.ShowRootLines = false;
			this._TreeView.Size = new System.Drawing.Size(576, 528);
			this._TreeView.TabIndex = 1;
			this._TreeView.DoubleClick += new System.EventHandler(this.TreeView_DoubleClick);
			this._TreeView.AfterSelect += new System.Windows.Forms.TreeViewEventHandler(this.TreeView_AfterSelect);
			// 
			// Form1
			// 
			this.AllowDrop = true;
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(592, 570);
			this.Controls.Add(this._TreeView);
			this.Controls.Add(this.toolBar);
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.Menu = this.mainMenu;
			this.Name = "Form1";
			this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Show;
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "CheckHelpLinks";
			this.Load += new System.EventHandler(this.Form1_Load);
			this.DragDrop += new System.Windows.Forms.DragEventHandler(this.Form1_DragDrop);
			this.DragEnter += new System.Windows.Forms.DragEventHandler(this.Form1_DragEnter);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main( string[] args ) 
		{
			_Args = args;

			Application.EnableVisualStyles();
			Application.DoEvents();
			Application.Run(new Form1());
		}

		private void Form1_Load(object sender, System.EventArgs e)
		{
			FormPosition.Restore( this );

			ResetTreeView();

			User32.PostMessage( Handle, Global.WM_KickStart, 0, 0 );
		}

		protected override void WndProc( ref Message m )
		{
			if ( m.Msg == Global.WM_KickStart ) KickStart();

			base.WndProc( ref m );
		}

		private void KickStart()
		{
			Arguments args = new Arguments();

#if trueX
			_Args = new string[]
				{
//					"/o:C:\\dev\\CodeProject\\CheckHelpLinks\\Karen\\QVBasic.chm",
					"/o:\"C:\\dev\\CodeProject\\CheckHelpLinks\\Test\\Test.chm\"",
					"-w",
					"-x:'C:\\dev\\CodeProject\\CheckHelpLinks\\Test\\junk'",
					"/close",
				};
#endif

			args.Parse( _Args );

			if ( args.FastSet )
				if ( args.Fast )
					OnModeFast();
				else
					OnModeSlow();

			if ( args.Open != null )
			{
				if ( args.Open.Length > 0 ) LoadFromFile( args.Open );
				else
				{
					StringCollection a = _RecentFileList.RecentFiles;
					if ( a.Count > 0 ) LoadFromFile( a[ 0 ] );
				}
			}

			if ( _All != null )
			{
				if ( args.Work ) _All.Work();

				if ( args.Export != null )
				{
					Export export = new Export( _All );

					if ( args.Export.Length > 0 ) Export.Directory = args.Export;

					export.WriteAll();
				}
			}

			if ( args.Close ) Close();
		}

//-----------------------------------------------------------------------------
// Handlers

		private void toolBar_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
		{
			if ( e.Button == toolBarButtonFileOpen             ) { OnFileOpen             (); return; }
			if ( e.Button == toolBarButtonViewRefresh          ) { OnViewRefresh          (); return; }
			if ( e.Button == toolBarButtonWork                 ) { OnWork                 (); return; }
			if ( e.Button == toolBarButtonFast                 ) { OnToggleFast           (); return; }

			Debug.Assert( false );
		}

		private void menuItemFileOpen_Click(object sender, System.EventArgs e)
		{
			OnFileOpen();
		}

		private void menuItemFileWork_Click(object sender, System.EventArgs e)
		{
			OnWork();
		}

		private void menuItemFileExport_Click(object sender, System.EventArgs e)
		{
			OnExport();
		}

		private void menuItemFileExit_Click(object sender, System.EventArgs e)
		{
			OnFileExit();
		}

		private void menuItemEditCopy_Click(object sender, System.EventArgs e)
		{
			OnEditCopy();
		}

		private void menuItemEditFind_Click(object sender, System.EventArgs e)
		{
			OnFind();
		}

		private void menuItemEditFindNext_Click(object sender, System.EventArgs e)
		{
			OnFindNext();
		}

		private void menuItemEditFindPrevious_Click(object sender, System.EventArgs e)
		{
			OnFindPrevious();
		}

		private void menuItemModeFast_Click(object sender, System.EventArgs e)
		{
			OnModeFast();
		}

		private void menuItemModeSlow_Click(object sender, System.EventArgs e)
		{
			OnModeSlow();
		}

		private void menuItemViewRefresh_Click(object sender, System.EventArgs e)
		{
			OnViewRefresh();
		}

		private void menuItemViewExpand_Click(object sender, System.EventArgs e)
		{
			OnViewExpand();
		}

		private void menuItemViewPage_Click(object sender, System.EventArgs e)
		{
			OnViewPage();
		}

		private void menuItemViewBrowser_Click(object sender, System.EventArgs e)
		{
			OnViewBrowser();
		}

		private void menuItemViewSource_Click(object sender, System.EventArgs e)
		{
			OnViewSource();
		}

//-----------------------------------------------------------------------------
// File

		private void menuItemFile_Popup(object sender, System.EventArgs e)
		{
			_RecentFileList.SetMenuItems();
		}

		private void OnRecentFileClick( object sender, RecentFileList.MenuClickEventArgs e )
		{
			if ( ! LoadFromFile( e.Filename ) )
			{
				_RecentFileList.RemoveFile( e.Filename );
				return;
			}
		}

		private void OnFileOpen()
		{
			string dir = Global.DefaultDirectory.String;

			OpenFileDialog dlg = new OpenFileDialog();
			dlg.InitialDirectory = dir;
			dlg.Filter = "Help Files (*.chm)|*.chm|All Files (*.*)|*.*";

			if ( dlg.ShowDialog( this ) != DialogResult.OK ) return;

			if ( ! LoadFromFile( dlg.FileName ) ) return;

			Global.DefaultDirectory.Set( Path.GetDirectoryName( dlg.FileName ) );
		}

		private bool LoadFromFile( string filename )
		{
			if ( ! File.Exists( filename ) ) return false;

			DateTime start = DateTime.Now;

			using ( new CWaitCursor() )
			{
				_Reader = new HtmlHelpSystem();
				_Reader.OpenFile( filename );

				_All = new All( filename, _Reader );

				_All.FillTreeView( _TreeView );
			}

			_RecentFileList.InsertFile( filename );
			_Filename = filename;
			Text = _Filename + " - CheckHelpLinks";

			if ( ! _Refresh ) Export.Directory = String.Empty;

			TimeSpan t = DateTime.Now - start;

//			MessageBox.Show( t.Seconds + "." + t.Milliseconds );

			return true;
		}

		private void OnFileExit()
		{
			Close();
		}

		private void OnViewRefresh()
		{
			if ( _Filename == null )
			{
				MessageBox.Show( "Please open a .chm file first !", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error );
				return;
			}

			try
			{
				_Refresh = true;

				LoadFromFile( _Filename );
			}
			finally
			{
				_Refresh = false;
			}
		}

//-----------------------------------------------------------------------------
// Edit

		private void OnEditCopy()
		{
			TreeNode n = _TreeView.SelectedNode;
			if ( n == null ) n = _TreeView.Nodes[ 0 ];
			if ( n == null )
			{
				MessageBox.Show( "Please select a node first !", "Failure", MessageBoxButtons.OK, MessageBoxIcon.Exclamation );
				return;
			}

			TreeItem item = n.Tag as TreeItem;
			if ( item == null )
			{
				MessageBox.Show( "Failed to copy link to clipboard", "Failure", MessageBoxButtons.OK, MessageBoxIcon.Exclamation );
				return;
			}

			string link = item.Link;
			if ( link == null )
			{
				MessageBox.Show( "This node does not have a link", "Failure", MessageBoxButtons.OK, MessageBoxIcon.Exclamation );
				return;
			}

			Clipboard.SetDataObject( link, true );

			MessageBox.Show( "Copied link to clipboard :" + Environment.NewLine + Environment.NewLine + link, "Success", MessageBoxButtons.OK, MessageBoxIcon.Information );
		}

		private void OnFind()
		{
			DlgFind dlg = new DlgFind( _Find.Parameters );
			if ( dlg.ShowDialog() != DialogResult.OK ) return;

			_Find.SaveToRegistry();

			switch ( dlg.Direction )
			{
			case FindDirection.Next     : OnFindNext     (); break;
			case FindDirection.Previous : OnFindPrevious (); break;
			default: Debug.Assert( false ); break;
			}
		}

		private void OnFindNext()
		{
			TreeNode n = _TreeView.SelectedNode;
			if ( n == null ) n = _TreeView.Nodes[ 0 ];
			if ( n == null ) return;

			n = _Find.FindNext( n, FindDirection.Next );

			if ( n == null ) User32.MessageBeep( MB.IconAsterisk );

			if ( n != null ) _TreeView.SelectedNode = n;
		}

		private void OnFindPrevious()
		{
			TreeNode n = _TreeView.SelectedNode;
			if ( n == null ) n = _TreeView.Nodes[ 0 ];
			if ( n == null ) return;

			n = _Find.FindNext( n, FindDirection.Previous );

			if ( n == null ) User32.MessageBeep( MB.IconAsterisk );

			if ( n != null ) _TreeView.SelectedNode = n;
		}


//-----------------------------------------------------------------------------
// View

		private void OnViewExpand()
		{
			TreeNode n = _TreeView.SelectedNode;
			if ( n == null ) return;

			n.ExpandAll();
		}

#if false

		private void OnViewNextBroken()
		{
			TreeNode n = _TreeView.SelectedNode;
			if ( n == null ) n = _TreeView.Nodes[ 0 ];
			if ( n == null ) return;

			for (;;)
			{
				Application.DoEvents();
//				n = GetNextNode( n );
				if ( n == null ) return;
				if ( n.ImageIndex == (int) State.Broken ) break;
			}

			if ( n != null ) _TreeView.SelectedNode = n;
		}

		private void OnViewNextNotGood()
		{
			TreeNode n = _TreeView.SelectedNode;
			if ( n == null ) n = _TreeView.Nodes[ 0 ];
			if ( n == null ) return;;

			for (;;)
			{
				Application.DoEvents();
//				n = GetNextNode( n );
				if ( n == null ) return;
				if ( n.ImageIndex != (int) State.Good ) break;
			}

			if ( n != null ) _TreeView.SelectedNode = n;
		}

#endif

		private void OnViewPage()
		{
			TreeNode n = _TreeView.SelectedNode;
			if ( n == null ) return;

			object tag = n.Tag;
			if ( tag == null ) return;

			if ( ! ( tag is TreeItem ) ) return;
//			if ( ! ( tag is HtmlFileItem ) ) return;
			
			TreeItem item = ( TreeItem ) tag;
			string link = item.Link;
			if ( link == null ) return;

			DlgBrowser dlg = new DlgBrowser();
			dlg.Url = link;
			dlg.AutoClose = false;
			dlg.ShowDialog();
		}

		private void OnViewBrowser()
		{
			TreeNode n = _TreeView.SelectedNode;
			if ( n == null ) return;

			object tag = n.Tag;
			if ( tag == null ) return;

			if ( ! ( tag is TreeItem ) ) return;
//			if ( ! ( tag is HtmlFileItem ) ) return;
			
			TreeItem item = ( TreeItem ) tag;
			string link = item.Link;
			if ( link == null ) return;

			Process p = Process.Start( link );
		}

		private void OnViewSource()
		{
			TreeNode n = _TreeView.SelectedNode;
			if ( n == null ) return;

			object tag = n.Tag;
			if ( tag == null ) return;

			if ( ! ( tag is TreeItem ) ) return;
//			if ( ! ( tag is HtmlFileItem ) ) return;
			
			TreeItem item = ( TreeItem ) tag;
			string link = item.Link;
			if ( link == null ) return;

			string source = null;

//			if ( item is HtmlFileItem ) source = ( ( HtmlFileItem ) item ).Html;

			if ( item is LinkItem )
			{
				LinkItem linkItem = ( LinkItem ) item;
				if ( linkItem.LinkType != LinkType.Help ) return;

				ChmFileItem chmFileItem = _All.GetChmFile( linkItem.ChmFile );
				if ( chmFileItem == null ) return;

				HtmlFileItem htmlFileItem = chmFileItem.HtmlFileItem( linkItem.LinkFile );
				if ( htmlFileItem == null ) return;

				source = htmlFileItem.Html;
			}

			if ( source == null ) return;

			DlgSource dlg = new DlgSource();
			dlg.Link = link;
			dlg.Source = source;
			dlg.ShowDialog();
		}

//-----------------------------------------------------------------------------
// TreeView

		private void ResetTreeView()
		{
			_TreeView.Nodes.Clear();

			_TreeView.Nodes.Add( new TreeNode( "Unknown", (int) State.Unknown, (int) State.Unknown ) );
			_TreeView.Nodes.Add( new TreeNode( "Good"   , (int) State.Good   , (int) State.Good    ) );
			_TreeView.Nodes.Add( new TreeNode( "Broken" , (int) State.Broken , (int) State.Broken  ) );
		}


//-----------------------------------------------------------------------------
// TreeView handlers

		private void TreeView_AfterSelect(object sender, System.Windows.Forms.TreeViewEventArgs e)
		{
			object tag = e.Node.Tag;

			if ( tag is TreeItem ) ( ( TreeItem ) tag ).OnAfterSelect();
		}

		private void TreeView_DoubleClick( object sender, System.EventArgs e )
		{
			TreeNode n = _TreeView.SelectedNode;
			if ( n == null ) return;

			object tag = n.Tag;

			if ( tag is TreeItem ) ( ( TreeItem ) tag ).OnDoubleClick();
		}

//-----------------------------------------------------------------------------
// Work

		private void OnWork()
		{
			if ( _All == null )
			{
				MessageBox.Show( "Please open a .chm file first !", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error );
				return;
			}

			TreeNode n = _TreeView.SelectedNode;
			if ( n == null )
			{
				MessageBox.Show( "Please select a node first !", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error );
				return;
			}

			object tag = n.Tag;

			if ( tag is TreeItem )
			{
				TreeItem i = ( TreeItem ) tag;
				
				i.Work();
				i.UpdateParentState();
			}
		}

//-----------------------------------------------------------------------------
// Export

		private void OnExport()
		{
			if ( _All == null )
			{
				MessageBox.Show( "Please open a .chm file first !", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error );
				return;
			}

			Export export = new Export( _All );

			if ( export.ShowOptions() != DialogResult.OK ) return;

			if ( export.WriteAll() )
				MessageBox.Show( "Exported results", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information );
			else
				MessageBox.Show( "Failed to export results", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning );
		}


//-----------------------------------------------------------------------------
// Fast

		private void OnToggleFast()
		{
			Global.FastParse = ! Global.FastParse;

			Debug.Assert( toolBarButtonFast.Pushed == Global.FastParse );

			SetFastToolTip();
			SetFastChecks();
		}

		private void OnModeFast()
		{
			Global.FastParse = true;

			SetFastToolTip();
			SetFastChecks();
		}

		private void OnModeSlow()
		{
			Global.FastParse = false;

			SetFastToolTip();
			SetFastChecks();
		}

		private void SetFastToolTip()
		{
			toolBarButtonFast.Pushed = Global.FastParse;

			toolBarButtonFast.ToolTipText =
				"Toggle Fast Parsing ( currently in " +
				( Global.FastParse ? "Fast" : "Slow" ) +
				" mode )";
		}

		private void SetFastChecks()
		{
			bool b = Global.FastParse;

			menuItemModeFast.Checked =   b;
			menuItemModeSlow.Checked = ! b;

			Global.FastMode.Set( Global.FastParse );
		}

//-----------------------------------------------------------------------------

		private void Form1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
		{
//			string[] sa = e.Data.GetFormats();

			string s = GetFilename( e.Data );

			if ( s != null ) 
				e.Effect = DragDropEffects.Link;
			else
				e.Effect = DragDropEffects.None;
		}

		private void Form1_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
		{
			string s = GetFilename( e.Data );

			if ( s != null ) LoadFromFile( s );
		}

		private string GetFilename( IDataObject data )
		{
//			if ( e.Data.GetDataPresent( DataFormats.FileDrop ) )

			object o = data.GetData( DataFormats.FileDrop );

			if ( o == null ) return null;

			if ( ! ( o is string[] ) ) return null;

			string[] sa = ( string[] ) o;

			if ( sa.Length != 1 ) return null;

			string s = sa[ 0 ];

			if ( String.Compare( Path.GetExtension( s ), ".chm", true ) != 0 ) return null;

			return s;
		}

//-----------------------------------------------------------------------------
	
	}
}