mobile/android/base/sync/setup/activities/WebURLFinder.java@b8a032363ba2 (annotated)
mobile/android/base/sync/setup/activities/WebURLFinder.java
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | package org.mozilla.gecko.sync.setup.activities; |
| michael@0 | 6 | |
| michael@0 | 7 | import java.net.URI; |
| michael@0 | 8 | import java.net.URISyntaxException; |
| michael@0 | 9 | import java.util.ArrayList; |
| michael@0 | 10 | import java.util.Collection; |
| michael@0 | 11 | import java.util.LinkedList; |
| michael@0 | 12 | import java.util.List; |
| michael@0 | 13 | import java.util.regex.Matcher; |
| michael@0 | 14 | |
| michael@0 | 15 | import android.util.Patterns; |
| michael@0 | 16 | |
| michael@0 | 17 | public class WebURLFinder { |
| michael@0 | 18 | public final List<String> candidates; |
| michael@0 | 19 | |
| michael@0 | 20 | public WebURLFinder(String string) { |
| michael@0 | 21 | if (string == null) { |
| michael@0 | 22 | throw new IllegalArgumentException("string must not be null"); |
| michael@0 | 23 | } |
| michael@0 | 24 | |
| michael@0 | 25 | this.candidates = candidateWebURLs(string); |
| michael@0 | 26 | } |
| michael@0 | 27 | |
| michael@0 | 28 | public WebURLFinder(List<String> strings) { |
| michael@0 | 29 | if (strings == null) { |
| michael@0 | 30 | throw new IllegalArgumentException("strings must not be null"); |
| michael@0 | 31 | } |
| michael@0 | 32 | |
| michael@0 | 33 | this.candidates = candidateWebURLs(strings); |
| michael@0 | 34 | } |
| michael@0 | 35 | |
| michael@0 | 36 | /** |
| michael@0 | 37 | * Check if string is a Web URL. |
| michael@0 | 38 | * <p> |
| michael@0 | 39 | * A Web URL is a URI that is not a <code>file:</code> or |
| michael@0 | 40 | * <code>javascript:</code> scheme. |
| michael@0 | 41 | * |
| michael@0 | 42 | * @param string |
| michael@0 | 43 | * to check. |
| michael@0 | 44 | * @return <code>true</code> if <code>string</code> is a Web URL. |
| michael@0 | 45 | */ |
| michael@0 | 46 | public static boolean isWebURL(String string) { |
| michael@0 | 47 | try { |
| michael@0 | 48 | new URI(string); |
| michael@0 | 49 | } catch (Exception e) { |
| michael@0 | 50 | return false; |
| michael@0 | 51 | } |
| michael@0 | 52 | |
| michael@0 | 53 | if (android.webkit.URLUtil.isFileUrl(string) || |
| michael@0 | 54 | android.webkit.URLUtil.isJavaScriptUrl(string)) { |
| michael@0 | 55 | return false; |
| michael@0 | 56 | } |
| michael@0 | 57 | |
| michael@0 | 58 | return true; |
| michael@0 | 59 | } |
| michael@0 | 60 | |
| michael@0 | 61 | /** |
| michael@0 | 62 | * Return best Web URL. |
| michael@0 | 63 | * <p> |
| michael@0 | 64 | * "Best" means a Web URL with a scheme, and failing that, a Web URL without a |
| michael@0 | 65 | * scheme. |
| michael@0 | 66 | * |
| michael@0 | 67 | * @return a Web URL or <code>null</code>. |
| michael@0 | 68 | */ |
| michael@0 | 69 | public String bestWebURL() { |
| michael@0 | 70 | String firstWebURLWithScheme = firstWebURLWithScheme(); |
| michael@0 | 71 | if (firstWebURLWithScheme != null) { |
| michael@0 | 72 | return firstWebURLWithScheme; |
| michael@0 | 73 | } |
| michael@0 | 74 | |
| michael@0 | 75 | return firstWebURLWithoutScheme(); |
| michael@0 | 76 | } |
| michael@0 | 77 | |
| michael@0 | 78 | protected static List<String> candidateWebURLs(Collection<String> strings) { |
| michael@0 | 79 | List<String> candidates = new ArrayList<String>(); |
| michael@0 | 80 | |
| michael@0 | 81 | for (String string : strings) { |
| michael@0 | 82 | if (string == null) { |
| michael@0 | 83 | continue; |
| michael@0 | 84 | } |
| michael@0 | 85 | |
| michael@0 | 86 | candidates.addAll(candidateWebURLs(string)); |
| michael@0 | 87 | } |
| michael@0 | 88 | |
| michael@0 | 89 | return candidates; |
| michael@0 | 90 | } |
| michael@0 | 91 | |
| michael@0 | 92 | protected static List<String> candidateWebURLs(String string) { |
| michael@0 | 93 | Matcher matcher = Patterns.WEB_URL.matcher(string); |
| michael@0 | 94 | List<String> matches = new LinkedList<String>(); |
| michael@0 | 95 | |
| michael@0 | 96 | while (matcher.find()) { |
| michael@0 | 97 | // Remove URLs with bad schemes. |
| michael@0 | 98 | if (!isWebURL(matcher.group())) { |
| michael@0 | 99 | continue; |
| michael@0 | 100 | } |
| michael@0 | 101 | |
| michael@0 | 102 | // Remove parts of email addresses. |
| michael@0 | 103 | if (matcher.start() > 0 && (string.charAt(matcher.start() - 1) == '@')) { |
| michael@0 | 104 | continue; |
| michael@0 | 105 | } |
| michael@0 | 106 | |
| michael@0 | 107 | matches.add(matcher.group()); |
| michael@0 | 108 | } |
| michael@0 | 109 | |
| michael@0 | 110 | return matches; |
| michael@0 | 111 | } |
| michael@0 | 112 | |
| michael@0 | 113 | protected String firstWebURLWithScheme() { |
| michael@0 | 114 | for (String match : candidates) { |
| michael@0 | 115 | try { |
| michael@0 | 116 | if (new URI(match).getScheme() != null) { |
| michael@0 | 117 | return match; |
| michael@0 | 118 | } |
| michael@0 | 119 | } catch (URISyntaxException e) { |
| michael@0 | 120 | // Ignore: on to the next. |
| michael@0 | 121 | continue; |
| michael@0 | 122 | } |
| michael@0 | 123 | } |
| michael@0 | 124 | |
| michael@0 | 125 | return null; |
| michael@0 | 126 | } |
| michael@0 | 127 | |
| michael@0 | 128 | protected String firstWebURLWithoutScheme() { |
| michael@0 | 129 | if (!candidates.isEmpty()) { |
| michael@0 | 130 | return candidates.get(0); |
| michael@0 | 131 | } |
| michael@0 | 132 | |
| michael@0 | 133 | return null; |
| michael@0 | 134 | } |
| michael@0 | 135 | } |
