using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;

namespace PDFPatcher.Processor
{
	sealed class ConvertUnitProcessor : IInfoDocProcessor
	{
		public float UnitFactor { get; set; }

		public ConvertUnitProcessor () {
			this.UnitFactor = 1;
		}

		#region IInfoDocProcessor 成员

		public bool Process (System.Xml.XmlElement item) {
			ConvertUnit (item, Constants.Coordinates.Bottom);
			ConvertUnit (item, Constants.Coordinates.Left);
			ConvertUnit (item, Constants.Coordinates.Right);
			ConvertUnit (item, Constants.Coordinates.Top);
			return true;
		}

		#endregion

		bool ConvertUnit (System.Xml.XmlElement item, string attribute) {
			var a = item.GetAttributeNode (attribute);
			if (a != null) {
				a.Value = Common.UnitConverter.ToPoint (a.Value, this.UnitFactor);
				return true;
			}
			return false;
		}
	}
}