zxing/csharp/client/result/GeoResultParser.cs

/*
* Copyright 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using Result = com.google.zxing.Result;
namespace com.google.zxing.client.result
{
	
	/// <summary> Parses a "geo:" URI result, which specifies a location on the surface of
	/// the Earth as well as an optional altitude above the surface. See
	/// <a href="http://tools.ietf.org/html/draft-mayrhofer-geo-uri-00">
	/// http://tools.ietf.org/html/draft-mayrhofer-geo-uri-00</a>.
	/// 
	/// </summary>
	/// <author>  Sean Owen
	/// </author>
	/// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source 
	/// </author>
	sealed class GeoResultParser:ResultParser
	{
		
		private GeoResultParser()
		{
		}
		
		public static GeoParsedResult parse(Result result)
		{
			System.String rawText = result.Text;
			if (rawText == null || (!rawText.StartsWith("geo:") && !rawText.StartsWith("GEO:")))
			{
				return null;
			}
			// Drop geo, query portion
			//UPGRADE_WARNING: Method 'java.lang.String.indexOf' was converted to 'System.String.IndexOf' which may throw an exception. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1101'"
			int queryStart = rawText.IndexOf('?', 4);
			System.String geoURIWithoutQuery = queryStart < 0?rawText.Substring(4):rawText.Substring(4, (queryStart) - (4));
			int latitudeEnd = geoURIWithoutQuery.IndexOf(',');
			if (latitudeEnd < 0)
			{
				return null;
			}
			//UPGRADE_WARNING: Method 'java.lang.String.indexOf' was converted to 'System.String.IndexOf' which may throw an exception. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1101'"
			int longitudeEnd = geoURIWithoutQuery.IndexOf(',', latitudeEnd + 1);
			double latitude, longitude, altitude;
			try
			{
				latitude = System.Double.Parse(geoURIWithoutQuery.Substring(0, (latitudeEnd) - (0)));
				if (longitudeEnd < 0)
				{
					longitude = System.Double.Parse(geoURIWithoutQuery.Substring(latitudeEnd + 1));
					altitude = 0.0;
				}
				else
				{
					longitude = System.Double.Parse(geoURIWithoutQuery.Substring(latitudeEnd + 1, (longitudeEnd) - (latitudeEnd + 1)));
					altitude = System.Double.Parse(geoURIWithoutQuery.Substring(longitudeEnd + 1));
				}
			}
			catch (System.FormatException)
			{
				return null;
			}
			return new GeoParsedResult(rawText.StartsWith("GEO:")?"geo:" + rawText.Substring(4):rawText, latitude, longitude, altitude);
		}
	}
}