mobile/android/base/util/StringUtils.java@b8a032363ba2 (annotated)
mobile/android/base/util/StringUtils.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 | /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*- |
| michael@0 | 2 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | package org.mozilla.gecko.util; |
| michael@0 | 7 | |
| michael@0 | 8 | import android.net.Uri; |
| michael@0 | 9 | import android.text.TextUtils; |
| michael@0 | 10 | |
| michael@0 | 11 | public class StringUtils { |
| michael@0 | 12 | |
| michael@0 | 13 | private static final String FILTER_URL_PREFIX = "filter://"; |
| michael@0 | 14 | |
| michael@0 | 15 | /* |
| michael@0 | 16 | * This method tries to guess if the given string could be a search query or URL, |
| michael@0 | 17 | * and returns a previous result if there is ambiguity |
| michael@0 | 18 | * |
| michael@0 | 19 | * Search examples: |
| michael@0 | 20 | * foo |
| michael@0 | 21 | * foo bar.com |
| michael@0 | 22 | * foo http://bar.com |
| michael@0 | 23 | * |
| michael@0 | 24 | * URL examples |
| michael@0 | 25 | * foo.com |
| michael@0 | 26 | * foo.c |
| michael@0 | 27 | * :foo |
| michael@0 | 28 | * http://foo.com bar |
| michael@0 | 29 | * |
| michael@0 | 30 | * wasSearchQuery specifies whether text was a search query before the latest change |
| michael@0 | 31 | * in text. In ambiguous cases where the new text can be either a search or a URL, |
| michael@0 | 32 | * wasSearchQuery is returned |
| michael@0 | 33 | */ |
| michael@0 | 34 | public static boolean isSearchQuery(String text, boolean wasSearchQuery) { |
| michael@0 | 35 | // We remove leading and trailing white spaces when decoding URLs |
| michael@0 | 36 | text = text.trim(); |
| michael@0 | 37 | if (text.length() == 0) |
| michael@0 | 38 | return wasSearchQuery; |
| michael@0 | 39 | |
| michael@0 | 40 | int colon = text.indexOf(':'); |
| michael@0 | 41 | int dot = text.indexOf('.'); |
| michael@0 | 42 | int space = text.indexOf(' '); |
| michael@0 | 43 | |
| michael@0 | 44 | // If a space is found before any dot and colon, we assume this is a search query |
| michael@0 | 45 | if (space > -1 && (colon == -1 || space < colon) && (dot == -1 || space < dot)) { |
| michael@0 | 46 | return true; |
| michael@0 | 47 | } |
| michael@0 | 48 | // Otherwise, if a dot or a colon is found, we assume this is a URL |
| michael@0 | 49 | if (dot > -1 || colon > -1) { |
| michael@0 | 50 | return false; |
| michael@0 | 51 | } |
| michael@0 | 52 | // Otherwise, text is ambiguous, and we keep its status unchanged |
| michael@0 | 53 | return wasSearchQuery; |
| michael@0 | 54 | } |
| michael@0 | 55 | |
| michael@0 | 56 | public static class UrlFlags { |
| michael@0 | 57 | public static final int NONE = 0; |
| michael@0 | 58 | public static final int STRIP_HTTPS = 1; |
| michael@0 | 59 | } |
| michael@0 | 60 | |
| michael@0 | 61 | public static String stripScheme(String url) { |
| michael@0 | 62 | return stripScheme(url, UrlFlags.NONE); |
| michael@0 | 63 | } |
| michael@0 | 64 | |
| michael@0 | 65 | public static String stripScheme(String url, int flags) { |
| michael@0 | 66 | if (url == null) { |
| michael@0 | 67 | return url; |
| michael@0 | 68 | } |
| michael@0 | 69 | |
| michael@0 | 70 | int start = 0; |
| michael@0 | 71 | int end = url.length(); |
| michael@0 | 72 | |
| michael@0 | 73 | if (url.startsWith("http://")) { |
| michael@0 | 74 | start = 7; |
| michael@0 | 75 | } else if (url.startsWith("https://") && flags == UrlFlags.STRIP_HTTPS) { |
| michael@0 | 76 | start = 8; |
| michael@0 | 77 | } |
| michael@0 | 78 | |
| michael@0 | 79 | if (url.endsWith("/")) { |
| michael@0 | 80 | end--; |
| michael@0 | 81 | } |
| michael@0 | 82 | |
| michael@0 | 83 | return url.substring(start, end); |
| michael@0 | 84 | } |
| michael@0 | 85 | |
| michael@0 | 86 | public static String stripCommonSubdomains(String host) { |
| michael@0 | 87 | if (host == null) { |
| michael@0 | 88 | return host; |
| michael@0 | 89 | } |
| michael@0 | 90 | |
| michael@0 | 91 | // In contrast to desktop, we also strip mobile subdomains, |
| michael@0 | 92 | // since its unlikely users are intentionally typing them |
| michael@0 | 93 | int start = 0; |
| michael@0 | 94 | |
| michael@0 | 95 | if (host.startsWith("www.")) { |
| michael@0 | 96 | start = 4; |
| michael@0 | 97 | } else if (host.startsWith("mobile.")) { |
| michael@0 | 98 | start = 7; |
| michael@0 | 99 | } else if (host.startsWith("m.")) { |
| michael@0 | 100 | start = 2; |
| michael@0 | 101 | } |
| michael@0 | 102 | |
| michael@0 | 103 | return host.substring(start); |
| michael@0 | 104 | } |
| michael@0 | 105 | |
| michael@0 | 106 | /** |
| michael@0 | 107 | * Searches the url query string for the first value with the given key. |
| michael@0 | 108 | */ |
| michael@0 | 109 | public static String getQueryParameter(String url, String desiredKey) { |
| michael@0 | 110 | if (TextUtils.isEmpty(url) || TextUtils.isEmpty(desiredKey)) { |
| michael@0 | 111 | return null; |
| michael@0 | 112 | } |
| michael@0 | 113 | |
| michael@0 | 114 | final String[] urlParts = url.split("\\?"); |
| michael@0 | 115 | if (urlParts.length < 2) { |
| michael@0 | 116 | return null; |
| michael@0 | 117 | } |
| michael@0 | 118 | |
| michael@0 | 119 | final String query = urlParts[1]; |
| michael@0 | 120 | for (final String param : query.split("&")) { |
| michael@0 | 121 | final String pair[] = param.split("="); |
| michael@0 | 122 | final String key = Uri.decode(pair[0]); |
| michael@0 | 123 | |
| michael@0 | 124 | // Key is empty or does not match the key we're looking for, discard |
| michael@0 | 125 | if (TextUtils.isEmpty(key) || !key.equals(desiredKey)) { |
| michael@0 | 126 | continue; |
| michael@0 | 127 | } |
| michael@0 | 128 | // No value associated with key, discard |
| michael@0 | 129 | if (pair.length < 2) { |
| michael@0 | 130 | continue; |
| michael@0 | 131 | } |
| michael@0 | 132 | final String value = Uri.decode(pair[1]); |
| michael@0 | 133 | if (TextUtils.isEmpty(value)) { |
| michael@0 | 134 | return null; |
| michael@0 | 135 | } |
| michael@0 | 136 | return value; |
| michael@0 | 137 | } |
| michael@0 | 138 | |
| michael@0 | 139 | return null; |
| michael@0 | 140 | } |
| michael@0 | 141 | |
| michael@0 | 142 | public static boolean isFilterUrl(String url) { |
| michael@0 | 143 | if (TextUtils.isEmpty(url)) { |
| michael@0 | 144 | return false; |
| michael@0 | 145 | } |
| michael@0 | 146 | |
| michael@0 | 147 | return url.startsWith(FILTER_URL_PREFIX); |
| michael@0 | 148 | } |
| michael@0 | 149 | |
| michael@0 | 150 | public static String getFilterFromUrl(String url) { |
| michael@0 | 151 | if (TextUtils.isEmpty(url)) { |
| michael@0 | 152 | return null; |
| michael@0 | 153 | } |
| michael@0 | 154 | |
| michael@0 | 155 | return url.substring(FILTER_URL_PREFIX.length()); |
| michael@0 | 156 | } |
| michael@0 | 157 | } |
