using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Volian.Base.Library;

namespace ctlXMLEditLib
{
	public partial class roRichTextBox : RichTextBox  // C2022-003 Symbols in RO Editor.  Customized RichTextBox for RO Editor.
	{
		public roRichTextBox()
		{
			InitializeComponent();
		}
		private string _RtfPrefix;  // contains Font table and styles (bold/underline/italics) for rtb from step style
		public string RtfPrefixForSymbols
		{
			get
			{
				//B2020-100 RHM Use SelectionFont rather than the font from the format file.
				StringBuilder selectedRtfSB = new StringBuilder();
				AddFontTable(selectedRtfSB, FormatFont, true);
				_RtfPrefix = selectedRtfSB.ToString();
				return _RtfPrefix + @"\f1\fs" + 10 * 2 + " ";
			}
		}
		public void InsertSymbol( int symbcode)
		{
			int position = this.SelectionStart;
			string sym = string.Format(symbcode < 256 ? "\'{0:X2}" : @"\u{0}", symbcode);
			this.SelectedRtf = RtfPrefixForSymbols + sym + @"}";
			Select(position, -1);
			Select(position + 1, 0);
		}
		public void rchtxtBox_KeyDown(object sender,string RO_IDEN) // C2022-003 code used to prevent a symbol from being inserted into RO ID.
		{
			bool symFlg = false;

			roRichTextBox o = (roRichTextBox)sender;
			if (o.Name == RO_IDEN)
			{
				if (Clipboard.GetDataObject().GetDataPresent(DataFormats.Text))
				{
						string clpBrd = Clipboard.GetText();
						char[] chrAry = clpBrd.ToCharArray();
						foreach (int chr in chrAry)
						{
							if (chr > 166)
							{
								symFlg = true;
								break;
							}
							else
							{
								symFlg = false;
							}
						}
						if (symFlg == true)
						{
							MessageBox.Show("Symbols are not allowed in the field. Clipbroad: '" + clpBrd + "'");
							Clipboard.Clear();
						}
				}
			}
		}
		private static void AddFontTable(StringBuilder selectedRtfSB, Font myFont, bool isFixed)
		{
			StringBuilder sbbeg = new StringBuilder();
			StringBuilder sbend = new StringBuilder();
			if (myFont.Bold)
			{
				sbbeg.Append(@"\b");
				sbend.Append(@"\b0");
			}
			if (myFont.Underline)
			{
				sbbeg.Append(@"\ul");
				sbend.Insert(0, @"\ulnone");
			}
			if (myFont.Italic)
			{
				sbbeg.Append(@"\i");
				sbend.Insert(0, @"\i0");
			}
			selectedRtfSB.Append(@"{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fnil\fcharset2 " + myFont.FontFamily.Name + @";}"); 
			if (!isFixed)
				selectedRtfSB.Append(@"{\f1\fnil\fcharset0 " + Volian.Base.Library.vlnFont.ProportionalSymbolFont + @";}}{\colortbl ;\red255\green0\blue0;\red0\green0\blue255;}");  // C2017-036 get best available proportional font for symbols - B2025-039 add Blue for Colored Replace Words
			else
				selectedRtfSB.Append(@"{\f1\fnil\fcharset0 FreeMono;}}{\colortbl ;\red255\green0\blue0;\red0\green0\blue255;}");  // FreeMono is now used for the edit screen only.  VESymbFix and Consolas are used for printing
			selectedRtfSB.Append("\r\n");
			// use styles to construct rtf commands to insert into next line (where \b, etc is)
			// B2015-134 Hanging Indent with Hard Returns was not being saved- removed \sl-240\slmult0
			selectedRtfSB.Append(@"\viewkind4\uc1\pard" + sbbeg.ToString() + @"\fs" + Convert.ToInt32(myFont.SizeInPoints * 2).ToString() + @" "); 
		}
		private Font _FormatFont;
		public Font FormatFont
		{
			get
			{
				if (_FormatFont == null)
				{
					Font formatFont;
					formatFont = Font;
					_FormatFont = formatFont;
				}

				// We found that the characters in the Letter Gothic font do not all use the same spacing.
				// Also, the character spacing is even more different between screen resolutions.
				// But the Letter Gothic font will print just fine.
				// We also found that the Letter Gothic Tall font works just fine on the screen, the only difference
				// is that the characters are a little bit taller.
				// So we decided to use the Letter Gothic Tall font for the screen display any time that Letter Gothic is used.
				if (_FormatFont.Name.ToUpper().Equals("LETTER GOTHIC"))
					_FormatFont = new Font("Letter Gothic Tall", _FormatFont.Size, _FormatFont.Style);
				return _FormatFont;
			}
			set { _FormatFont = value; }
		}
	}
}