mirror of
https://github.com/zxing/zxing.git
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7616c4d06d
git-svn-id: https://zxing.googlecode.com/svn/trunk@2558 59b500cc-1b3d-0410-9834-0bbf25fbcc57
403 lines
13 KiB
C#
Executable file
403 lines
13 KiB
C#
Executable file
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Text;
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using System.Text.RegularExpressions;
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using com.google.zxing.common;
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/*
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* Copyright 2008 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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namespace com.google.zxing.client.result
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{
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using Result = com.google.zxing.Result;
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/// <summary>
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/// Parses contact information formatted according to the VCard (2.1) format. This is not a complete
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/// implementation but should parse information as commonly encoded in 2D barcodes.
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///
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/// @author Sean Owen
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/// </summary>
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public sealed class VCardResultParser : ResultParser
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{
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private static readonly string BEGIN_VCARD = "BEGIN:VCARD";
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private static readonly string VCARD_LIKE_DATE = "\\d{4}-?\\d{2}-?\\d{2}";
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private static readonly string CR_LF_SPACE_TAB = "\r\n[ \t]";
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private static readonly string NEWLINE_ESCAPE = "\\\\[nN]";
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private static readonly string VCARD_ESCAPES = "\\\\([,;\\\\])";
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private static readonly string EQUALS = "=";
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private static readonly string SEMICOLON = ";";
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private static readonly string UNESCAPED_SEMICOLONS = "(?<!\\\\);+";
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public override ParsedResult parse(Result result)
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{
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// Although we should insist on the raw text ending with "END:VCARD", there's no reason
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// to throw out everything else we parsed just because this was omitted. In fact, Eclair
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// is doing just that, and we can't parse its contacts without this leniency.
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string rawText = getMassagedText(result);
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Match m = Regex.Match(rawText, BEGIN_VCARD, RegexOptions.IgnoreCase);
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if (!m.Success || m.Index != 0)
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{
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return null;
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}
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IList<IList<string>> names = matchVCardPrefixedField("FN", rawText, true, false);
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if (names == null)
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{
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// If no display names found, look for regular name fields and format them
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names = matchVCardPrefixedField("N", rawText, true, false);
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formatNames(names);
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}
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IList<IList<string>> phoneNumbers = matchVCardPrefixedField("TEL", rawText, true, false);
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IList<IList<string>> emails = matchVCardPrefixedField("EMAIL", rawText, true, false);
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IList<string> note = matchSingleVCardPrefixedField("NOTE", rawText, false, false);
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IList<IList<string>> addresses = matchVCardPrefixedField("ADR", rawText, true, true);
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IList<string> org = matchSingleVCardPrefixedField("ORG", rawText, true, true);
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IList<string> birthday = matchSingleVCardPrefixedField("BDAY", rawText, true, false);
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if (birthday != null && !isLikeVCardDate(birthday[0]))
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{
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birthday = null;
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}
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IList<string> title = matchSingleVCardPrefixedField("TITLE", rawText, true, false);
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IList<string> url = matchSingleVCardPrefixedField("URL", rawText, true, false);
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IList<string> instantMessenger = matchSingleVCardPrefixedField("IMPP", rawText, true, false);
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return new AddressBookParsedResult(toPrimaryValues(names), null, toPrimaryValues(phoneNumbers), toTypes(phoneNumbers), toPrimaryValues(emails), toTypes(emails), toPrimaryValue(instantMessenger), toPrimaryValue(note), toPrimaryValues(addresses), toTypes(addresses), toPrimaryValue(org), toPrimaryValue(birthday), toPrimaryValue(title), toPrimaryValue(url));
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}
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internal static IList<IList<string>> matchVCardPrefixedField(string prefix, string rawText, bool trim, bool parseFieldDivider)
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{
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IList<IList<string>> matches = null;
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int i = 0;
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int max = rawText.Length;
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while (i < max)
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{
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// At start or after newline, match prefix, followed by optional metadata
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// (led by ;) ultimately ending in colon
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//Matcher matcher = Pattern.compile("(?:^|\n)" + prefix + "(?:;([^:]*))?:", Pattern.CASE_INSENSITIVE).matcher(rawText);
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Regex matcher = new Regex("(?:^|\n)" + prefix + "(?:;([^:]*))?:", RegexOptions.IgnoreCase);
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//(rawText);
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if (i > 0)
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{
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i--; // Find from i-1 not i since looking at the preceding character
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}
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//if (!matcher.find(i))
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Match match = matcher.Match(rawText);
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if (!match.Success)
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{
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break;
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}
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//i = matcher.end(0); // group 0 = whole pattern; end(0) is past final colon
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i = match.Groups[0].Index + match.Groups[0].Length; // group 0 = whole pattern; end(0) is past final colon
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string metadataString = match.Groups[1].Value; // group 1 = metadata substring
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IList<string> metadata = null;
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bool quotedPrintable = false;
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string quotedPrintableCharset = null;
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if (metadataString != null)
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{
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foreach (string metadatum in SEMICOLON.Split(new string[] {metadataString},StringSplitOptions.None))
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{
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if (metadata == null)
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{
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metadata = new List<string>(1);
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}
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metadata.Add(metadatum);
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//string[] metadatumTokens = EQUALS.Split(metadatum, 2);
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string[] metadatumTokens = EQUALS.Split(new string[] {metadatum},2,StringSplitOptions.None);
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if (metadatumTokens.Length > 1)
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{
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string key = metadatumTokens[0];
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string value = metadatumTokens[1];
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if ("ENCODING"== key.ToUpper() && "QUOTED-PRINTABLE"==value.ToUpper())
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{
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quotedPrintable = true;
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}
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else if ("CHARSET" == key.ToUpper())
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{
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quotedPrintableCharset = value;
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}
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}
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}
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}
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int matchStart = i; // Found the start of a match here
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while ((i =(int) rawText.IndexOf( '\n', i)) >= 0) // Really, end in \r\n
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{
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if (i < rawText.Length - 1 && (rawText[i + 1] == ' ' || rawText[i + 1] == '\t')) // this is only a continuation - But if followed by tab or space,
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{
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i += 2; // Skip \n and continutation whitespace
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} // If preceded by = in quoted printable
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else if (quotedPrintable && ((i >= 1 && rawText[i - 1] == '=') || (i >= 2 && rawText[i - 2] == '='))) // this is a continuation
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{
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i++; // Skip \n
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}
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else
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{
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break;
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}
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}
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if (i < 0)
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{
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// No terminating end character? uh, done. Set i such that loop terminates and break
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i = max;
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}
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else if (i > matchStart)
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{
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// found a match
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if (matches == null)
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{
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matches = new List<IList<string>>(1); // lazy init
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}
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if (i >= 1 && rawText[i - 1] == '\r')
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{
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i--; // Back up over \r, which really should be there
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}
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string element = rawText.Substring(matchStart, i - matchStart);
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if (trim)
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{
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element = element.Trim();
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}
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if (quotedPrintable)
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{
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element = decodeQuotedPrintable(element, quotedPrintableCharset);
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if (parseFieldDivider)
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{
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//element = UNESCAPED_SEMICOLONS.matcher(element).replaceAll("\n").Trim();
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element = new Regex(UNESCAPED_SEMICOLONS).Replace(element,("\n")).Trim();
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}
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}
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else
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{
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if (parseFieldDivider)
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{
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//element = UNESCAPED_SEMICOLONS.matcher(element).replaceAll("\n").Trim();
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element = new Regex(UNESCAPED_SEMICOLONS).Replace(element,"\n").Trim();
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}
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//element = CR_LF_SPACE_TAB.matcher(element).replaceAll("");
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element = new Regex(CR_LF_SPACE_TAB).Replace(element,"");
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//element = NEWLINE_ESCAPE.matcher(element).replaceAll("\n");
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element = new Regex(NEWLINE_ESCAPE).Replace(element,"\n");
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//element = VCARD_ESCAPES.matcher(element).replaceAll("$1");
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element = new Regex(VCARD_ESCAPES).Replace(element,"$1");
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}
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if (metadata == null)
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{
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IList<string> matchList = new List<string>(1);
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matchList.Add(element);
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matches.Add(matchList);
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}
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else
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{
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metadata.Insert(0, element);
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matches.Add(metadata);
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}
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i++;
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}
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else
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{
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i++;
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}
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}
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return matches;
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}
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private static string decodeQuotedPrintable(string value, string charset)
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{
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int length = value.Length;
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StringBuilder result = new StringBuilder(length);
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MemoryStream fragmentBuffer = new MemoryStream();
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for (int i = 0; i < length; i++)
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{
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char c = value[i];
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switch (c)
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{
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case '\r':
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case '\n':
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break;
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case '=':
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if (i < length - 2)
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{
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char nextChar = value[i + 1];
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if (nextChar != '\r' && nextChar != '\n')
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{
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char nextNextChar = value[i + 2];
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int firstDigit = parseHexDigit(nextChar);
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int secondDigit = parseHexDigit(nextNextChar);
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if (firstDigit >= 0 && secondDigit >= 0)
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{
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fragmentBuffer.WriteByte((byte)((firstDigit << 4) + secondDigit));
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} // else ignore it, assume it was incorrectly encoded
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i += 2;
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}
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}
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break;
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default:
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maybeAppendFragment(fragmentBuffer, charset, result);
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result.Append(c);
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break;
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}
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}
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maybeAppendFragment(fragmentBuffer, charset, result);
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return result.ToString();
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}
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private static void maybeAppendFragment(MemoryStream fragmentBuffer, string charset, StringBuilder result)
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{
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Encoding en = Encoding.GetEncoding(charset);
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Encoding enFallback = Encoding.UTF8;
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if (fragmentBuffer.Length > 0)
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{
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sbyte[] fragmentBytes = fragmentBuffer.ToArray().ToSBytes();
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string fragment;
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if (charset == null)
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{
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fragment = en.GetString((byte[])(Array)fragmentBytes); ;
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}
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else
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{
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try
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{
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fragment = en.GetString((byte[])(Array)fragmentBytes); ;
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}
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catch (ArgumentException e)
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{
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// Yikes, well try anyway:
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//fragment = new string(fragmentBytes);
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fragment = enFallback.GetString((byte[]) (Array) fragmentBytes);
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}
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}
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fragmentBuffer.Position=0;
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result.Append(fragment);
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}
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}
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internal static IList<string> matchSingleVCardPrefixedField(string prefix, string rawText, bool trim, bool parseFieldDivider)
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{
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IList<IList<string>> values = matchVCardPrefixedField(prefix, rawText, trim, parseFieldDivider);
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return values == null || values.Count == 0 ? null : values[0];
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}
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private static string toPrimaryValue(IList<string> list)
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{
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return list == null || list.Count == 0 ? null : list[0];
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}
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private static string[] toPrimaryValues(ICollection<IList<string>> lists)
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{
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if (lists == null || lists.Count == 0)
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{
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return null;
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}
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List<string> result = new List<string>(lists.Count);
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foreach (IList<string> list in lists)
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{
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result.Add(list[0]);
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}
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return result.ToArray();
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}
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private static string[] toTypes(ICollection<IList<string>> lists)
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{
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if (lists == null || lists.Count == 0)
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{
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return null;
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}
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List<string> result = new List<string>(lists.Count);
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foreach (IList<string> list in lists)
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{
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string type = null;
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for (int i = 1; i < list.Count; i++)
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{
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string metadatum = list[i];
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int equals = metadatum.IndexOf('=');
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if (equals < 0)
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{
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// take the whole thing as a usable label
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type = metadatum;
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break;
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}
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if ("TYPE" == (metadatum.Substring(0, equals)).ToUpper())
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{
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type = metadatum.Substring(equals + 1);
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break;
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}
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}
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result.Add(type);
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}
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return result.ToArray();
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}
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private static bool isLikeVCardDate(string value)
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{
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//return value == null || VCARD_LIKE_DATE.matcher(value).matches();
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return value == null || new Regex(VCARD_LIKE_DATE).IsMatch(value);
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}
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/// <summary>
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/// Formats name fields of the form "Public;John;Q.;Reverend;III" into a form like
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/// "Reverend John Q. Public III".
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/// </summary>
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/// <param name="names"> name values to format, in place </param>
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private static void formatNames(IEnumerable<IList<string>> names)
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{
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if (names != null)
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{
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foreach (IList<string> list in names)
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{
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string name = list[0];
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string[] components = new string[5];
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int start = 0;
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int end;
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int componentIndex = 0;
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while (componentIndex < components.Length - 1 && (end = name.IndexOf(';', start)) > 0)
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{
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components[componentIndex] = name.Substring(start, end - start);
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componentIndex++;
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start = end + 1;
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}
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components[componentIndex] = name.Substring(start);
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StringBuilder newName = new StringBuilder(100);
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maybeAppendComponent(components, 3, newName);
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maybeAppendComponent(components, 1, newName);
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maybeAppendComponent(components, 2, newName);
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maybeAppendComponent(components, 0, newName);
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maybeAppendComponent(components, 4, newName);
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list[0] = newName.ToString().Trim();
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}
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}
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}
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private static void maybeAppendComponent(string[] components, int i, StringBuilder newName)
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{
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if (components[i] != null)
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{
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newName.Append(' ');
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newName.Append(components[i]);
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}
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}
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}
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} |