using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using iTextSharp.text.pdf;
using iTextSharp.text;
using VEPROMS.CSLA.Library;

namespace Volian.Print.Library
{
	public partial class vlnTab : vlnText
	{
		/// <summary>
		/// Used to Align Tabs for numeric tabs that can go to 2 digits
		/// </summary>
		private float? _TabAlign;
		public float TabAlign // Offset to Last printable character
		{
			get
			{
				if (_TabAlign == null)
				{
					_TabAlign = 0;
					if (Text != null)
					{
						while (Text[(int)_TabAlign] == ' ')
							_TabAlign++;
						if ("0123456789".Contains(Text[(int)_TabAlign].ToString()))
						{
							while ("0123456789".Contains(Text[(int)_TabAlign].ToString()))
								_TabAlign++;
							_TabAlign--;
						}
					}
				}
				return (float)_TabAlign * MyFont.CharsToTwips;
			}
		}
		private float? _TabOffset;
		public float TabOffset // Offset to first printable character
		{
			get
			{
				if (_TabOffset == null)
				{
					_TabOffset = 0;
					if (Text != null)
						while (Text[(int)_TabOffset] == ' ')
							_TabOffset++;
				}
				return (float)_TabOffset * MyFont.CharsToTwips;
			}
		}
		private vlnMacro _MyMacro;
		public vlnMacro MyMacro
		{
			get { return _MyMacro; }
			set { _MyMacro = value; }
		}
		
		public vlnTab(PdfContentByte cb, vlnParagraph myparent, string origTab, string cleanTab, float xoffset, float yoffset, VE_Font vFont, bool doSectTab)
		{
			MyContentByte = cb;
			MyParent = myparent;
			YOffset = yoffset;
			Text = cleanTab;
			MyFont = vFont;
			Width = MyFont.CharsToTwips * (Text != null ? Text.Length : origTab.Length);
			if (origTab.Contains(@"{!"))
			{
				int mindx = origTab.IndexOf(@"{!");
				int meindx = origTab.IndexOf(@"}", mindx);
				string macro = origTab.Substring(mindx, meindx - mindx+1);
				// Width for placement of macro should be position in the string where the macro was located.
				float lwidth = MyFont.CharsToTwips * (origTab.Length - meindx);
				MyMacro = new vlnMacro(xoffset - lwidth, yoffset, macro.Substring(2, macro.Length - 3));
				origTab = origTab.Replace(macro,"");
				origTab = origTab + " ";
				cleanTab = origTab;
				Width = MyFont.CharsToTwips * (cleanTab != null ? cleanTab.Length : origTab.Length);
			}
			Rtf = GetRtf(origTab, vFont);
			// do positioning based on whether format has locations for section 'header'.  If it's not centered, treat
			// it's location more like a 'tab'.
			if (doSectTab)
				XOffset = xoffset;
			else
				XOffset = xoffset - Width;
			
		}
		public override float ToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin)
		{
			float yLocation = CalculateYOffset(yPageStart, yTopMargin);
			Rtf2Pdf.TextAt(cb, IParagraph, XOffset, yLocation, Width, 100, "", yBottomMargin);
			return yPageStart;
		}
	}
}