htmlrichtextbox.cs

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using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.Text.RegularExpressions;
using System.ComponentModel;

namespace GPCore.GibphoneControls
{
    /// <summary>
    /// A RichTextBox that supports Pictures and HTML
    /// </summary>
	public class HtmlRichTextBox: RichTextBox
	{
        /// <summary>
        /// This converts between RTF to HTML and either returns it
        /// or puts it in the textbox
        /// </summary>
        [System.ComponentModel.DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
		public string Html
		{
			get
			{
				RtfText rt = new RtfText(this.Rtf);
				return rt.Html;
			}
			set
			{
				HtmlText ht = new HtmlText(value);
				this.Rtf = ht.Rtf;
			}
		}
        /// <summary>
        /// Gets or Sets the SelectedHtml
        /// </summary>
        [System.ComponentModel.DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public string SelectedHtml
        {
            get
            {
                RtfText rt = new RtfText(SelectedRtf);
                return rt.Html;
            }
            set
            {
                HtmlText ht = new HtmlText(value);
                this.SelectedRtf = ht.Rtf;
            }
        }
        
        /// <summary>
        /// This appends <paramref name="html"/>to the end of the 
        /// text box.
        /// </summary>
        /// <param name="html">The HTML to append</param>
        /// <returns><paramref name="html"/> in Rtf</returns>
        public string AppendHTML(string html)
        {
            HtmlText ht = new HtmlText(html);
            this.Select(this.TextLength, 0);
            return this.SelectedRtf = ht.Rtf;
           //return this.Rtf = ht.Rtf;
        }
        
        /// <summary>
        /// Adds an Image to the end of the textbox
        /// </summary>
        /// <param name="filename">The filename of the Image</param>
        public void AddImage(string filename)
        {
            AddImage(Image.FromFile(filename));
        }
        /// <summary>
        /// Adds an Image to the end of the textbox
        /// </summary>
        /// <param name="img">The Image to insert</param>
        public void AddImage(Image img)
        {
            IDataObject obj = Clipboard.GetDataObject();
            Clipboard.SetImage(img);
            this.Select(this.TextLength, 0);
            bool ro = ReadOnly;
            ReadOnly = false;
            this.Paste();
            ReadOnly = ro;
            Clipboard.SetDataObject(obj);
        }

        public void AddImageAtSelection(string filename)
        {
            AddImageAtSelection(Image.FromFile(filename));
        }
        public void AddImageAtSelection(Image img)
        {
            IDataObject obj = Clipboard.GetDataObject();
            Clipboard.SetImage(img);

            bool ro = this.ReadOnly;
            ReadOnly = false;
            this.Paste();
            ReadOnly = ro;

            //Clipboard.SetDataObject(obj);
        }
        /// <summary>
        /// Applies <paramref name="fnt"/> to the selected text
        /// </summary>
        /// <param name="fnt"></param>
        public void ApplyFont(Font fnt)
        {
            SelectionFont = fnt;
        }        

        /// <summary>
        /// Applys a color to the selected text 
        /// </summary>
        /// <param name="col">The color to apply</param>
        /// <param name="Foreground">Set to true if this color applies to the foreground and false if it applies to the background</param>
        public void ApplyColor(Color col, bool Foreground)
        {
            if (Foreground)
            {
                SelectionColor = col;
            } else
            {
                SelectionBackColor = col;
            }
        }        
	}
}