// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2004 Novell, Inc. (http://www.novell.com)
//
// Author:
//      Ravindra (rkumar@novell.com)
//
// Todo:
//     - Drawing of focus rectangle



// NOT COMPLETE


using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Runtime.Serialization;

namespace System.Windows.Forms
{
	[DefaultProperty ("Text")]
	[DesignTimeVisible (false)]
	[Serializable]
	[ToolboxItem (false)]
	[TypeConverter (typeof (ListViewItemConverter))]
	public class ListViewItem : ICloneable, ISerializable
	{
		#region Instance Variables
		private int image_index = -1;
		private bool is_checked = false;
		private bool is_focused = false;
		private int state_image_index = -1;
		private ListViewSubItemCollection sub_items;
		private object tag;
		private bool use_item_style = true;

		// internal variables
		internal Rectangle checkbox_rect;	// calculated by CalcListViewItem method
		internal Rectangle entire_rect;
		internal Rectangle icon_rect;
		internal Rectangle item_rect;
		internal Rectangle label_rect;
		internal Point location = Point.Empty;	// set by the ListView control
		internal ListView owner;
		internal bool selected;

		#endregion Instance Variables

		#region Public Constructors
		public ListViewItem ()
		{
			this.sub_items = new ListViewSubItemCollection (this);
			this.sub_items.Add ("");			
		}

		public ListViewItem (string text) : this (text, -1)
		{
		}

		public ListViewItem (string [] items) : this (items, -1)
		{
		}

		public ListViewItem (ListViewItem.ListViewSubItem [] subItems, int imageIndex)
		{
			this.sub_items = new ListViewSubItemCollection (this);
			this.sub_items.AddRange (subItems);
			this.image_index = imageIndex;
		}

		public ListViewItem (string text, int imageIndex)
		{
			this.image_index = imageIndex;
			this.sub_items = new ListViewSubItemCollection (this);
			this.sub_items.Add (text);
		}

		public ListViewItem (string [] items, int imageIndex)
		{
			this.sub_items = new ListViewSubItemCollection (this);
			this.sub_items.AddRange (items);
			this.image_index = imageIndex;
		}

		public ListViewItem (string [] items, int imageIndex, Color foreColor, 
				     Color backColor, Font font)
		{
			this.sub_items = new ListViewSubItemCollection (this);
			this.sub_items.AddRange (items);
			this.image_index = imageIndex;
			ForeColor = foreColor;
			BackColor = backColor;
			Font = font;
		}
		#endregion	// Public Constructors

		#region Public Instance Properties
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
		public Color BackColor {
			get {
				if (sub_items.Count > 0)
					return sub_items[0].BackColor;

				if (owner != null)
					return owner.BackColor;
				
				return ThemeEngine.Current.ColorWindow;
			}

			set { sub_items[0].BackColor = value; }
		}

		[Browsable (false)]
		public Rectangle Bounds {
			get {
				return GetBounds (ItemBoundsPortion.Entire);
			}
		}

		[DefaultValue (false)]
		[RefreshProperties (RefreshProperties.Repaint)]
		public bool Checked {
			get { return is_checked; }
			set { 
				if (is_checked == value)
					return;

				is_checked = value;
				if (owner != null)
					owner.Invalidate (Bounds);
			}
		}

		[Browsable (false)]
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
		public bool Focused {
			get { return is_focused; }
			set { 	
				if (is_focused == value)
					return;

				is_focused = value; 

				if (owner != null)
					owner.Invalidate (Bounds);
			}
		}

		[Localizable (true)]
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
		public Font Font {
			get {
				if (sub_items.Count > 0)
					return sub_items[0].Font;

				if (owner != null)
					return owner.Font;

				return ThemeEngine.Current.DefaultFont;
			}
			set { 	
				if (sub_items[0].Font == value)
					return;

				sub_items[0].Font = value; 

				if (owner != null)
					owner.Invalidate (Bounds);
			}
		}

		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
		public Color ForeColor {
			get {
				if (sub_items.Count > 0)
					return sub_items[0].ForeColor;

				if (owner != null)
					return owner.ForeColor;

				return ThemeEngine.Current.ColorWindowText;
			}
			set { sub_items[0].ForeColor = value; }
		}

		[DefaultValue (-1)]
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
		[Editor ("System.Windows.Forms.Design.ImageIndexEditor, " + Consts.AssemblySystem_Design,
			 typeof (System.Drawing.Design.UITypeEditor))]
		[Localizable (true)]
		[TypeConverter (typeof (ImageIndexConverter))]
		public int ImageIndex {
			get { return image_index; }
			set {
				if (value < -1)
					throw new ArgumentException ("Invalid ImageIndex. It must be greater than or equal to -1.");
				
				image_index = value;

				if (owner != null)
					owner.Invalidate (Bounds);	
			}
		}

		[Browsable (false)]
		public ImageList ImageList {
			get {
				if (owner == null)
					return null;
				else if (owner.View == View.LargeIcon)
					return owner.large_image_list;
				else
					return owner.small_image_list;
			}
		}

		[Browsable (false)]
		public int Index {
			get {
				if (owner == null)
					return -1;
				else
					return owner.Items.IndexOf (this);
			}
		}

		[Browsable (false)]
		public ListView ListView {
			get { return owner; }
		}

		[Browsable (false)]
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
		public bool Selected {
			get { return selected; }
			set {
				if (owner != null) {
					if (owner.CanMultiselect == false &&
					    owner.SelectedItems.Count > 0) {
						owner.SelectedItems.Clear ();
						owner.SelectedIndices.list.Clear ();
					}

					selected = value;
					if (selected) {
						//do we need !owner.SelectedItems.Contains (this))
						owner.SelectedItems.list.Add (this);
						owner.SelectedIndices.list.Add (this.Index);
					}
					else {
						owner.SelectedItems.list.Remove (this);
						owner.SelectedIndices.list.Remove (this.Index);
					}
				}
			}
		}

		[DefaultValue (-1)]
		[Editor ("System.Windows.Forms.Design.ImageIndexEditor, " + Consts.AssemblySystem_Design,
			 typeof (System.Drawing.Design.UITypeEditor))]
		[Localizable (true)]
		[TypeConverter (typeof (ImageIndexConverter))]
		public int StateImageIndex {
			get { return state_image_index; }
			set {
				if (value < -1 || value > 14)
					throw new ArgumentOutOfRangeException ("Invalid StateImageIndex. It must be in the range of [-1, 14].");

				state_image_index = value;
			}
		}

		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
		public ListViewSubItemCollection SubItems {
			get { return sub_items; }
		}

		[Bindable (true)]
		[DefaultValue (null)]
		[Localizable (false)]
		[TypeConverter (typeof (StringConverter))]
		public object Tag {
			get { return tag; }
			set { tag = value; }
		}

		[Localizable (true)]
		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
		public string Text {
			get {
				if (this.sub_items.Count > 0)
					return this.sub_items [0].Text;
				else
					return "";
			}
			set { this.sub_items [0].Text = value; }
		}

		[DefaultValue (true)]
		public bool UseItemStyleForSubItems {
			get { return use_item_style; }
			set { use_item_style = value; }
		}
		#endregion	// Public Instance Properties

		#region Public Instance Methods
		public void BeginEdit ()
		{
			// FIXME: TODO
			// if (owner != null && owner.LabelEdit 
			//    && owner.Activation == ItemActivation.Standard)
			// allow editing
			// else
			// throw new InvalidOperationException ();
		}

		public virtual object Clone ()
		{
			ListViewItem clone = new ListViewItem ();
			clone.image_index = this.image_index;
			clone.is_checked = this.is_checked;
			clone.is_focused = this.is_focused;
			clone.selected = this.selected;
			clone.state_image_index = this.state_image_index;
			clone.sub_items = new ListViewSubItemCollection (this);
			
			foreach (ListViewSubItem subItem in this.sub_items)
				clone.sub_items.Add (subItem.Text, subItem.ForeColor,
						     subItem.BackColor, subItem.Font);
			clone.tag = this.tag;
			clone.use_item_style = this.use_item_style;
			clone.owner = null;

			return clone;
		}

		public virtual void EnsureVisible ()
		{
			if (this.owner != null) {
				owner.EnsureVisible (owner.Items.IndexOf (this));
			}
		}

		public Rectangle GetBounds (ItemBoundsPortion portion)
		{
			if (owner == null)
				return Rectangle.Empty;
			
			// should we check for dirty flag to optimize this ?
			CalcListViewItem ();

			switch (portion) {

			case ItemBoundsPortion.Icon:
				return icon_rect;

			case ItemBoundsPortion.Label:
				return label_rect;

			case ItemBoundsPortion.ItemOnly:
				return item_rect;

			case ItemBoundsPortion.Entire:
				return entire_rect;

			default:
				throw new ArgumentException ("Invalid value for portion.");
			}
		}

		void ISerializable.GetObjectData (SerializationInfo info, StreamingContext context)
		{
			// FIXME: TODO
		}

		public virtual void Remove ()
		{
			if (owner != null)
				owner.Items.Remove (this);
			owner = null;
		}

		public override string ToString ()
		{
			return string.Format ("ListViewItem: {0}", this.Text);
		}
		#endregion	// Public Instance Methods

		#region Protected Methods
		protected virtual void Deserialize (SerializationInfo info, StreamingContext context)
		{
			// FIXME: TODO
		}

		protected virtual void Serialize (SerializationInfo info, StreamingContext context)
		{
			// FIXME: TODO
		}
		#endregion	// Protected Methods

		#region Private Internal Methods
		internal Rectangle CheckRect {
			get { return this.checkbox_rect; }
		}

		internal Rectangle EntireRect {
			get { return this.entire_rect; }
		}

		internal Rectangle IconRect {
			get { return this.icon_rect; }
		}

		internal Rectangle LabelRect {
			get { return this.label_rect; }
		}

		internal void CalcListViewItem ()
		{
			int item_ht;
			Size text_size = owner.text_size;
			
			if (owner.CheckBoxes)
				checkbox_rect.Size = owner.CheckBoxSize;
			else
				checkbox_rect = Rectangle.Empty;

			checkbox_rect.Location = this.location;

			switch (owner.View) {

			case View.Details:
				// LAMESPEC: MSDN says, "In all views except the details
				// view of the ListView, this value specifies the same
				// bounding rectangle as the Entire value." Actually, it
				// returns same bounding rectangles for Item and Entire
				// values in the case of Details view.

				icon_rect.X = checkbox_rect.X + checkbox_rect.Width + 2;
				icon_rect.Y = checkbox_rect.Y;

				item_ht = Math.Max (owner.CheckBoxSize.Height + 1,
						    text_size.Height);

				if (owner.SmallImageList != null) {
					item_ht = Math.Max (item_ht,
							    owner.SmallImageList.ImageSize.Height + 1);
					icon_rect.Width = owner.SmallImageList.ImageSize.Width;
				}
				else
					icon_rect.Width = 0;

				label_rect.Height = checkbox_rect.Height = icon_rect.Height = item_ht;

				label_rect.X = icon_rect.X + icon_rect.Width;
				label_rect.Y = icon_rect.Y;

				if (owner.Columns.Count > 0)
					label_rect.Width = Math.Max (text_size.Width, owner.Columns[0].Wd);
				else
					label_rect.Width = text_size.Width;

				item_rect = entire_rect = Rectangle.Union
					(Rectangle.Union (checkbox_rect, icon_rect), label_rect);

				// Take into account the rest of columns. First column
				// is already taken into account above.
				for (int i = 1; i < owner.Columns.Count; i++) {
					item_rect.Width += owner.Columns [i].Wd;
					entire_rect.Width += owner.Columns [i].Wd;
				}
				break;

			case View.LargeIcon:
				if (owner.LargeImageList != null) {
					icon_rect.Width = owner.LargeImageList.ImageSize.Width + 16;
					icon_rect.Height = owner.LargeImageList.ImageSize.Height + 4;
				}
				else {
					icon_rect.Width = 16;
					icon_rect.Height = 4;
				}

				if (text_size.Width <= (checkbox_rect.Width + icon_rect.Width)) {
			 		icon_rect.X = checkbox_rect.X + checkbox_rect.Width;
					icon_rect.Y = checkbox_rect.Y;

					label_rect.X = icon_rect.X + (icon_rect.Width 
								      - text_size.Width) / 2;
					label_rect.Y = Math.Max (checkbox_rect.Bottom,
								 icon_rect.Bottom) + 2;
					label_rect.Size = text_size;
				}
				else {
					label_rect.X = this.location.X;

					int centerX = label_rect.X + text_size.Width / 2;
					icon_rect.X = centerX - icon_rect.Width / 2;
					checkbox_rect.X = (icon_rect.X - checkbox_rect.Width);

					icon_rect.Y = checkbox_rect.Y;

					label_rect.Y = Math.Max (checkbox_rect.Bottom,
								 icon_rect.Bottom) + 2;
					label_rect.Size = text_size;
				}

				item_rect = Rectangle.Union (icon_rect, label_rect);
				entire_rect = Rectangle.Union (item_rect, checkbox_rect);
				break;

			case View.List:
					goto case View.SmallIcon;

			case View.SmallIcon:
				icon_rect.X = checkbox_rect.X + checkbox_rect.Width;
				icon_rect.Y = checkbox_rect.Y;

				item_ht = Math.Max (owner.CheckBoxSize.Height, text_size.Height);

				if (owner.SmallImageList != null) {
					item_ht = Math.Max (item_ht,
							    owner.SmallImageList.ImageSize.Height + 1);
					icon_rect.Width = owner.SmallImageList.ImageSize.Width;
				}
				else
					icon_rect.Width = 0;

				label_rect.Height = checkbox_rect.Height = icon_rect.Height = item_ht;

				label_rect.X = icon_rect.X + icon_rect.Width;
				label_rect.Y = icon_rect.Y;
				label_rect.Width = text_size.Width;

				item_rect = Rectangle.Union (icon_rect, label_rect);
				entire_rect = Rectangle.Union (item_rect, checkbox_rect);
				break;
			}
		}
		#endregion	// Private Internal Methods

		#region Subclasses

		[DefaultProperty ("Text")]
		[DesignTimeVisible (false)]
		[Serializable]
		[ToolboxItem (false)]
		[TypeConverter (typeof(ListViewSubItemConverter))]
		public class ListViewSubItem
		{
			private Color back_color;
			private Font font;
			private Color fore_color;
			internal ListViewItem owner;
			private string text;
			
			#region Public Constructors
			public ListViewSubItem ()
			{
			}

			public ListViewSubItem (ListViewItem owner, string text)
				: this (owner, text, ThemeEngine.Current.ColorWindowText,
					ThemeEngine.Current.ColorWindow,
					ThemeEngine.Current.DefaultFont)
			{
			}

			public ListViewSubItem (ListViewItem owner, string text, Color foreColor,
						Color backColor, Font font)
			{
				this.owner = owner;
				this.text = text;
				this.fore_color = foreColor;
				this.back_color = backColor;
				this.font = font;
			}
			#endregion // Public Constructors

			#region Public Instance Properties
			public Color BackColor {
				get { return back_color; }
				set { 
					back_color = value; 
					Invalidate ();
				    }
			}

			[Localizable (true)]
			public Font Font {
				get {
					if (font != null)
						return font;
					else if (owner != null)
						return owner.Font;
					return font;
				}
				set { 
					font = value; 
					Invalidate ();
				    }
			}

			public Color ForeColor {
				get { return fore_color; }
				set { 
					fore_color = value; 
					Invalidate ();
				    }
			}

			[Localizable (true)]
			public string Text {
				get { return text; }
				set { 
				      	text = value; 
					Invalidate ();
				    }
			}
			#endregion // Public Instance Properties

			#region Public Methods
			public void ResetStyle ()
			{
				font = ThemeEngine.Current.DefaultFont;
				back_color = ThemeEngine.Current.DefaultControlBackColor;
				fore_color = ThemeEngine.Current.DefaultControlForeColor;
				Invalidate ();
			}

			public override string ToString ()
			{
				return string.Format ("ListViewSubItem {{0}}", text);
			}
			#endregion // Public Methods

			
			#region Private Methods
			private void Invalidate ()
			{
				if (owner == null || owner.owner == null)
					return;

				owner.owner.Invalidate ();
			}
			#endregion // Private Methods
		}

		public class ListViewSubItemCollection : IList, ICollection, IEnumerable
		{
			private ArrayList list;
			internal ListViewItem owner;

			#region Public Constructors
			public ListViewSubItemCollection (ListViewItem owner)
			{
				this.owner = owner;
				this.list = new ArrayList ();
 			}
			#endregion // Public Constructors

			#region Public Properties
			[Browsable (false)]
			public virtual int Count {
				get { return list.Count; }
			}

			public virtual bool IsReadOnly {
				get { return false; }
			}

			public ListViewSubItem this [int index] {
				get { return (ListViewSubItem) list [index]; }
				set { 
					value.owner = this.owner;
					list [index] = value;
				}
			}

			bool ICollection.IsSynchronized {
				get { return list.IsSynchronized; }
			}

			object ICollection.SyncRoot {
				get { return list.SyncRoot; }
			}

			bool IList.IsFixedSize {
				get { return list.IsFixedSize; }
			}

			object IList.this [int index] {
				get { return this [index]; }
				set {
					if (! (value is ListViewSubItem))
						throw new ArgumentException ("Not of type ListViewSubItem", "value");
					this [index] = (ListViewSubItem) value;
				}
			}
			#endregion // Public Properties

			#region Public Methods
			public ListViewSubItem Add (ListViewSubItem item)
			{
				item.owner = this.owner;
				list.Add (item);
				return item;
			}

			public ListViewSubItem Add (string text)
			{
				ListViewSubItem item = new ListViewSubItem (this.owner, text);
				list.Add (item);
				return item;
			}

			public ListViewSubItem Add (string text, Color foreColor,
						    Color backColor, Font font)
			{
				ListViewSubItem item = new ListViewSubItem (this.owner, text,
									    foreColor, backColor, font);
				list.Add (item);
				return item;
			}

			public void AddRange (ListViewSubItem [] items)
			{
				this.Clear ();
				foreach (ListViewSubItem item in items)
					this.Add (item);
			}

			public void AddRange (string [] items)
			{
				this.Clear ();
				foreach (string item in items)
					this.Add (item);
			}

			public void AddRange (string [] items, Color foreColor,
					      Color backColor, Font font)
			{
				this.Clear ();
				foreach (string item in items)
					this.Add (item, foreColor, backColor, font);
			}

			public virtual void Clear ()
			{
				list.Clear ();
			}

			public bool Contains (ListViewSubItem item)
			{
				return list.Contains (item);
			}

			public virtual IEnumerator GetEnumerator ()
			{
				return list.GetEnumerator ();
			}

			void ICollection.CopyTo (Array dest, int index)
			{
				list.CopyTo (dest, index);
			}

			int IList.Add (object item)
			{
				if (! (item is ListViewSubItem)) {
					throw new ArgumentException ("Not of type ListViewSubItem", "item");
				}

				ListViewSubItem sub_item = (ListViewSubItem) item;
				sub_item.owner = this.owner;
				return list.Add (sub_item);
			}

			bool IList.Contains (object subItem)
			{
				if (! (subItem is ListViewSubItem)) {
					throw new ArgumentException ("Not of type ListViewSubItem", "subItem");
				}

				return this.Contains ((ListViewSubItem) subItem);
			}

			int IList.IndexOf (object subItem)
			{
				if (! (subItem is ListViewSubItem)) {
					throw new ArgumentException ("Not of type ListViewSubItem", "subItem");
				}

				return this.IndexOf ((ListViewSubItem) subItem);
			}

			void IList.Insert (int index, object item)
			{
				if (! (item is ListViewSubItem)) {
					throw new ArgumentException ("Not of type ListViewSubItem", "item");
				}

				this.Insert (index, (ListViewSubItem) item);
			}

			void IList.Remove (object item)
			{
				if (! (item is ListViewSubItem)) {
					throw new ArgumentException ("Not of type ListViewSubItem", "item");
				}

				this.Remove ((ListViewSubItem) item);
			}

			public int IndexOf (ListViewSubItem subItem)
			{
				return list.IndexOf (subItem);
			}

			public void Insert (int index, ListViewSubItem item)
			{
				item.owner = this.owner;
				list.Insert (index, item);
			}

			public void Remove (ListViewSubItem item)
			{
				list.Remove (item);
			}

			public virtual void RemoveAt (int index)
			{
				list.RemoveAt (index);
			}
			#endregion // Public Methods
		}
		#endregion // Subclasses
	}
}