RSS 2.0 Framework

// Copyright � 2006 by Christoph Richner. All rights are reserved.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
//
// website http://www.raccoom.net, email support@raccoom.net, msn chrisdarebell@msn.com

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using Raccoom.Xml;

namespace Raccoom.Windows.Forms
{
	/// <summary>
	/// 
	/// </summary>
	public class FormWindowKindOpml : System.Windows.Forms.Form, IChildWindow
	{
		#region fields		

		private System.ComponentModel.IContainer components;
		private OpmlDocument _opmlDocument;
		private string _filename = string.Empty;
		private System.Windows.Forms.MenuItem _mnuView;
		private System.Windows.Forms.ImageList _imageList;
		/// <summary>Flag specify that views have to refresh cause data changes</summary>
		private bool _refreshViews = false;
		private System.Windows.Forms.MainMenu _mainMenu;
		private bool _isChannelDirty = false;
		private MenuItem _lastSelectedView;
		private System.Windows.Forms.TabPage _tbTechnical;
		private TreeViewOpmlDocument _tvOutline;
		private System.Windows.Forms.Splitter splitter2;
		private System.Windows.Forms.PropertyGrid _propertyGrid;
		private NJFLib.Controls.CollapsibleSplitter splitter1;
		private System.Windows.Forms.ListBox _lbChanges;
		private System.Windows.Forms.TabControl _tabControl;
		private System.Windows.Forms.ContextMenu _cmTreeView;
		private System.Windows.Forms.MenuItem menuItem3;
		private System.Windows.Forms.MenuItem menuItem2;
		#endregion

		public FormWindowKindOpml()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();			
		}


		#region internal interface
		private delegate void LoadChannelDelegate(string location);
		/// <summary>
		/// Create a new RssChannel and update the UI
		/// </summary>
		private void LoadChannel(string location)
		{
			this.Cursor = Cursors.WaitCursor;
			try
			{
				Uri uri = new Uri(location);				
				this._opmlDocument = new OpmlDocument(uri);				
				_opmlDocument.PropertyChanged += new PropertyChangedEventHandler(_opmlDocument_PropertyChanged);
				//				
				_lbChanges.Items.Clear();				
				_propertyGrid.SelectedObject = _opmlDocument;				
				// local storage system
				_filename = (uri.Host.Length==0) ? location : string.Empty;				
			} 
			catch (System.Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
			this.Cursor = Cursors.Default;
		}
		/// <summary>
		/// Refresh the listview with the current rss channel items.
		/// </summary>
		private void PopulateTreeViewRoot()
		{
			this._tvOutline.Populate(this._opmlDocument);		
		}
		private void RefreshView()
		{			
			PopulateTreeViewRoot();
		}
	
		private void OpenHyperlink(string url)
		{
			System.Diagnostics.Process.Start(url);
		}
		private void NewChannel()
		{
			_opmlDocument = new OpmlDocument();
			_opmlDocument.PropertyChanged += new PropertyChangedEventHandler(_opmlDocument_PropertyChanged);			
			
			_lbChanges.Items.Clear();
			_propertyGrid.SelectedObject = _opmlDocument;
			_filename = string.Empty;			
		}
		
		private void CloseChannel()
		{
			_opmlDocument = null;
			_propertyGrid.SelectedObject = null;
			this._tvOutline.Nodes.Clear();			
			this.Text = this.ProductName;
			Dirty= false;
		}
		
		#endregion

		#region events
		protected override void OnLoad(EventArgs e)
		{
			base.OnLoad (e);
			//
			for(int i = _tabControl.TabPages.Count-1;i>=0;i--)
			{
				TabPage page = _tabControl.TabPages[i];
				System.Windows.Forms.MenuItem item = new System.Windows.Forms.MenuItem(page.Text);				
				item.Click += new EventHandler(OnViewMenuItemClick);
				page.Tag = item;
				this._mnuView.MenuItems.Add(0,item);
			}			
		}
		
		private void _tvOutline_AfterSelect(object sender, System.Windows.Forms.TreeViewEventArgs e)
		{
			if(e.Node ==null) return;
			TreeNodeOpmlOutline n = e.Node as TreeNodeOpmlOutline;
			this._propertyGrid.SelectedObject =(n.OpmlOutlineItem!=null) ?  (object) n.OpmlOutlineItem :  (object) this._opmlDocument;
			
		
		}
		
		/// <summary>
		/// Rss channel is dirty
		/// </summary>
		private void _opmlDocument_PropertyChanged(object sender, PropertyChangedEventArgs e)
		{
			// set flag to specify that next time preview or xml view is displayed they need to redraw
			_refreshViews = true;
			this.Dirty = true;			
			_lbChanges.Items.Insert(0,sender.GetType().Name+" - " + e.PropertyName);		
		}

		/// <summary>
		/// user clicked on a rss channel item in the listview. If the item link is set, load it.
		/// </summary>
		private void _lvFeed_DoubleClick(object sender, System.EventArgs e)
		{
			if (this._tvOutline.SelectedNode==null) return;
			OpmlOutline item = this._tvOutline.SelectedNode.Tag as OpmlOutline;
			//
			if(item==null || item.XmlUrl==null) return;
			//
			OpenHyperlink(item.XmlUrl);
		}
		private void _tabControl_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			if(_lastSelectedView!=null) _lastSelectedView.Checked = false;
			((MenuItem)this._tabControl.SelectedTab.Tag).Checked = true;
			_lastSelectedView = this._tabControl.SelectedTab.Tag as MenuItem;
			//
			if(this._tabControl.SelectedIndex > 0 && _refreshViews) 
			{
				this.RefreshView();
				//
				_refreshViews = false;
			}
		}
		private void OnViewMenuItemClick(object sender, EventArgs e)
		{
			foreach(TabPage page in _tabControl.TabPages)
			{
				if(page.Text == ((MenuItem)sender).Text)
				{
					_tabControl.SelectedTab = page;
					break;
				}
			}
		}
		private void _mnuHelpWebSite_Click(object sender, System.EventArgs e)
		{
			OpenHyperlink("http://raccoom.sytes.net");
		}
        private void _axWebBrowserHtml_BeforeNavigate2(object sender, WebBrowserNavigatingEventArgs  e)
		{
			if(e.Url.ToString().IndexOf("http://")!=-1)
			{
				e.Cancel = true;
				OpenHyperlink(e.Url.ToString());

			}
		}
		private void _actClose_Update(object sender, System.EventArgs e)
		{
			Dirty = false;			
		}
		#endregion

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

		
		/// <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(FormWindowKindOpml));
			this._imageList = new System.Windows.Forms.ImageList(this.components);
			this._mainMenu = new System.Windows.Forms.MainMenu();
			this.menuItem2 = new System.Windows.Forms.MenuItem();
			this._mnuView = new System.Windows.Forms.MenuItem();
			this._tbTechnical = new System.Windows.Forms.TabPage();
			this._tvOutline = new TreeViewOpmlDocument(this.components);
			this._cmTreeView = new System.Windows.Forms.ContextMenu();
			this.menuItem3 = new System.Windows.Forms.MenuItem();
			this.splitter2 = new System.Windows.Forms.Splitter();
			this._propertyGrid = new System.Windows.Forms.PropertyGrid();
			this.splitter1 = new NJFLib.Controls.CollapsibleSplitter();
			this._lbChanges = new System.Windows.Forms.ListBox();
			this._tabControl = new System.Windows.Forms.TabControl();
			this._tbTechnical.SuspendLayout();
			this._tabControl.SuspendLayout();
			this.SuspendLayout();
			// 
			// _imageList
			// 
			this._imageList.ColorDepth = System.Windows.Forms.ColorDepth.Depth32Bit;
			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;
			// 
			// _mainMenu
			// 
			this._mainMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem2,
																					  this._mnuView});
			// 
			// menuItem2
			// 
			this.menuItem2.Index = 0;
			this.menuItem2.MergeType = System.Windows.Forms.MenuMerge.Remove;
			this.menuItem2.Text = "&File";
			// 
			// _mnuView
			// 
			this._mnuView.Index = 1;
			this._mnuView.MergeType = System.Windows.Forms.MenuMerge.MergeItems;
			this._mnuView.Text = "&View";
			// 
			// _tbTechnical
			// 
			this._tbTechnical.Controls.Add(this._tvOutline);
			this._tbTechnical.Controls.Add(this.splitter2);
			this._tbTechnical.Controls.Add(this._propertyGrid);
			this._tbTechnical.Controls.Add(this.splitter1);
			this._tbTechnical.Controls.Add(this._lbChanges);
			this._tbTechnical.ImageIndex = 6;
			this._tbTechnical.Location = new System.Drawing.Point(4, 4);
			this._tbTechnical.Name = "_tbTechnical";
			this._tbTechnical.Size = new System.Drawing.Size(496, 371);
			this._tbTechnical.TabIndex = 1;
			this._tbTechnical.Text = "Design";
			this._tbTechnical.ToolTipText = "Shows the strong typed rss channel";
			// 
			// _tvOutline
			// 
			this._tvOutline.AllowDrop = true;
			this._tvOutline.ContextMenu = this._cmTreeView;
			this._tvOutline.Dock = System.Windows.Forms.DockStyle.Fill;
			this._tvOutline.FullRowSelect = true;
			this._tvOutline.LabelEdit = true;
			this._tvOutline.Location = new System.Drawing.Point(0, 0);
			this._tvOutline.Name = "_tvOutline";
			this._tvOutline.Size = new System.Drawing.Size(285, 320);
			this._tvOutline.TabIndex = 6;
			this._tvOutline.AfterSelect += new System.Windows.Forms.TreeViewEventHandler(this._tvOutline_AfterSelect);
			// 
			// _cmTreeView
			// 
			this._cmTreeView.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																						this.menuItem3});
			// 
			// menuItem3
			// 
			this.menuItem3.Index = 0;
			this.menuItem3.Text = "&New Item";
			// 
			// splitter2
			// 
			this.splitter2.Dock = System.Windows.Forms.DockStyle.Right;
			this.splitter2.Location = new System.Drawing.Point(285, 0);
			this.splitter2.Name = "splitter2";
			this.splitter2.Size = new System.Drawing.Size(3, 320);
			this.splitter2.TabIndex = 5;
			this.splitter2.TabStop = false;
			// 
			// _propertyGrid
			// 
			this._propertyGrid.CommandsVisibleIfAvailable = true;
			this._propertyGrid.Dock = System.Windows.Forms.DockStyle.Right;
			this._propertyGrid.LargeButtons = false;
			this._propertyGrid.LineColor = System.Drawing.SystemColors.ScrollBar;
			this._propertyGrid.Location = new System.Drawing.Point(288, 0);
			this._propertyGrid.Name = "_propertyGrid";
			this._propertyGrid.Size = new System.Drawing.Size(208, 320);
			this._propertyGrid.TabIndex = 0;
			this._propertyGrid.Text = "propertyGrid1";
			this._propertyGrid.ViewBackColor = System.Drawing.SystemColors.Window;
			this._propertyGrid.ViewForeColor = System.Drawing.SystemColors.WindowText;
			// 
			// splitter1
			// 
			this.splitter1.AnimationDelay = 20;
			this.splitter1.AnimationStep = 20;
			this.splitter1.BorderStyle3D = System.Windows.Forms.Border3DStyle.Flat;
			this.splitter1.ControlToHide = this._lbChanges;
			this.splitter1.Dock = System.Windows.Forms.DockStyle.Bottom;
			this.splitter1.ExpandParentForm = false;
			this.splitter1.Location = new System.Drawing.Point(0, 320);
			this.splitter1.Name = "splitter1";
			this.splitter1.TabIndex = 4;
			this.splitter1.TabStop = false;
			this.splitter1.UseAnimations = true;
			this.splitter1.VisualStyle = NJFLib.Controls.VisualStyles.DoubleDots;
			// 
			// _lbChanges
			// 
			this._lbChanges.Dock = System.Windows.Forms.DockStyle.Bottom;
			this._lbChanges.Location = new System.Drawing.Point(0, 328);
			this._lbChanges.Name = "_lbChanges";
			this._lbChanges.Size = new System.Drawing.Size(496, 43);
			this._lbChanges.TabIndex = 3;
			// 
			// _tabControl
			// 
			this._tabControl.Alignment = System.Windows.Forms.TabAlignment.Bottom;
			this._tabControl.Controls.Add(this._tbTechnical);
			this._tabControl.Dock = System.Windows.Forms.DockStyle.Fill;
			this._tabControl.ImageList = this._imageList;
			this._tabControl.ItemSize = new System.Drawing.Size(67, 19);
			this._tabControl.Location = new System.Drawing.Point(0, 0);
			this._tabControl.Name = "_tabControl";
			this._tabControl.SelectedIndex = 0;
			this._tabControl.ShowToolTips = true;
			this._tabControl.Size = new System.Drawing.Size(504, 398);
			this._tabControl.TabIndex = 4;
			this._tabControl.SelectedIndexChanged += new System.EventHandler(this._tabControl_SelectedIndexChanged);
			// 
			// FormWindowKindOpml
			// 
			this.AllowDrop = true;
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(504, 398);
			this.Controls.Add(this._tabControl);
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.Menu = this._mainMenu;
			this.Name = "FormWindowKindOpml";
			this.Text = "Opml Document";
			this._tbTechnical.ResumeLayout(false);
			this._tabControl.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion						

		#region nested class
		public class TreeNodeOpml : System.Windows.Forms.TreeNode
		{
			#region fields
			private OpmlOutline _outline;
			#endregion fiels

			#region constructor
			public TreeNodeOpml()
			{
			}
			public TreeNodeOpml(string text) : base(text)
			{
			}			
			public TreeNodeOpml(string text,int imageIndex,	int selectedImageIndex) : base(text, imageIndex, selectedImageIndex)
			{
			}
			#endregion

			#region public interface
			/// <summary>
			/// Adds a dummy node to the parent node
			/// </summary>		
			public virtual void AddDummyNode()
			{
				Nodes.Add(new TreeNodeOpml("@@Dummy@@"));
			}
			/// <summary>
			/// Removes the dummy node from the parent node.
			/// </summary>		
			public virtual void RemoveDummyNode()
			{
				if ((Nodes.Count == 1 ) & (Nodes[0].Text == "@@Dummy@@"))
				{
					Nodes[0].Remove();
				}
			}			
			public virtual OpmlOutline Outline
			{
				get
				{
					return _outline;
				}
				set
				{
					_outline = value;
				}
			}
			#endregion
		}
		#endregion

		#region IChildWindow Members
		string IChildWindow.XsltStyleSheet
		{
			get
			{
				return "Raccoom.Xml.Editors.opml.xslt";
			}
		}	
		public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;
		string IChildWindow.Filename{
			get
			{
				return this._filename;
			}
			set
			{
				_filename = value;
			}
		}
		public override string Text
		{
			get
			{
				return (_opmlDocument!=null && _opmlDocument.Head.Title!=null && _opmlDocument.Head.Title.Length>0) ? _opmlDocument.Head.Title : "Opml Document";
			}
			set
			{
				base.Text = value;
			}
		}
		void IChildWindow.Close()
		{
			this.Close();
		}
		void IChildWindow.Refresh()
		{
			this.RefreshView();
		}

		public void Open(Uri uri)
		{
			if(uri!=null)
			{
				this.LoadChannel(uri.AbsoluteUri);
			} 
			else 
			{
				this.NewChannel();
			}
		}

		public bool Dirty
		{
			get
			{				
				return this._isChannelDirty;
			}
			set
			{
				_isChannelDirty = value;
				if(PropertyChanged!=null) PropertyChanged(this, new PropertyChangedEventArgs(""));
			}
		}
		Raccoom.Xml.IPersistentManager IChildWindow.Object
		{
			get
			{
				return _opmlDocument;
			}
		}
		
		#endregion
	}
}