1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mobile/android/base/util/StringUtils.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,157 @@
1.4 +/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +package org.mozilla.gecko.util;
1.10 +
1.11 +import android.net.Uri;
1.12 +import android.text.TextUtils;
1.13 +
1.14 +public class StringUtils {
1.15 +
1.16 + private static final String FILTER_URL_PREFIX = "filter://";
1.17 +
1.18 + /*
1.19 + * This method tries to guess if the given string could be a search query or URL,
1.20 + * and returns a previous result if there is ambiguity
1.21 + *
1.22 + * Search examples:
1.23 + * foo
1.24 + * foo bar.com
1.25 + * foo http://bar.com
1.26 + *
1.27 + * URL examples
1.28 + * foo.com
1.29 + * foo.c
1.30 + * :foo
1.31 + * http://foo.com bar
1.32 + *
1.33 + * wasSearchQuery specifies whether text was a search query before the latest change
1.34 + * in text. In ambiguous cases where the new text can be either a search or a URL,
1.35 + * wasSearchQuery is returned
1.36 + */
1.37 + public static boolean isSearchQuery(String text, boolean wasSearchQuery) {
1.38 + // We remove leading and trailing white spaces when decoding URLs
1.39 + text = text.trim();
1.40 + if (text.length() == 0)
1.41 + return wasSearchQuery;
1.42 +
1.43 + int colon = text.indexOf(':');
1.44 + int dot = text.indexOf('.');
1.45 + int space = text.indexOf(' ');
1.46 +
1.47 + // If a space is found before any dot and colon, we assume this is a search query
1.48 + if (space > -1 && (colon == -1 || space < colon) && (dot == -1 || space < dot)) {
1.49 + return true;
1.50 + }
1.51 + // Otherwise, if a dot or a colon is found, we assume this is a URL
1.52 + if (dot > -1 || colon > -1) {
1.53 + return false;
1.54 + }
1.55 + // Otherwise, text is ambiguous, and we keep its status unchanged
1.56 + return wasSearchQuery;
1.57 + }
1.58 +
1.59 + public static class UrlFlags {
1.60 + public static final int NONE = 0;
1.61 + public static final int STRIP_HTTPS = 1;
1.62 + }
1.63 +
1.64 + public static String stripScheme(String url) {
1.65 + return stripScheme(url, UrlFlags.NONE);
1.66 + }
1.67 +
1.68 + public static String stripScheme(String url, int flags) {
1.69 + if (url == null) {
1.70 + return url;
1.71 + }
1.72 +
1.73 + int start = 0;
1.74 + int end = url.length();
1.75 +
1.76 + if (url.startsWith("http://")) {
1.77 + start = 7;
1.78 + } else if (url.startsWith("https://") && flags == UrlFlags.STRIP_HTTPS) {
1.79 + start = 8;
1.80 + }
1.81 +
1.82 + if (url.endsWith("/")) {
1.83 + end--;
1.84 + }
1.85 +
1.86 + return url.substring(start, end);
1.87 + }
1.88 +
1.89 + public static String stripCommonSubdomains(String host) {
1.90 + if (host == null) {
1.91 + return host;
1.92 + }
1.93 +
1.94 + // In contrast to desktop, we also strip mobile subdomains,
1.95 + // since its unlikely users are intentionally typing them
1.96 + int start = 0;
1.97 +
1.98 + if (host.startsWith("www.")) {
1.99 + start = 4;
1.100 + } else if (host.startsWith("mobile.")) {
1.101 + start = 7;
1.102 + } else if (host.startsWith("m.")) {
1.103 + start = 2;
1.104 + }
1.105 +
1.106 + return host.substring(start);
1.107 + }
1.108 +
1.109 + /**
1.110 + * Searches the url query string for the first value with the given key.
1.111 + */
1.112 + public static String getQueryParameter(String url, String desiredKey) {
1.113 + if (TextUtils.isEmpty(url) || TextUtils.isEmpty(desiredKey)) {
1.114 + return null;
1.115 + }
1.116 +
1.117 + final String[] urlParts = url.split("\\?");
1.118 + if (urlParts.length < 2) {
1.119 + return null;
1.120 + }
1.121 +
1.122 + final String query = urlParts[1];
1.123 + for (final String param : query.split("&")) {
1.124 + final String pair[] = param.split("=");
1.125 + final String key = Uri.decode(pair[0]);
1.126 +
1.127 + // Key is empty or does not match the key we're looking for, discard
1.128 + if (TextUtils.isEmpty(key) || !key.equals(desiredKey)) {
1.129 + continue;
1.130 + }
1.131 + // No value associated with key, discard
1.132 + if (pair.length < 2) {
1.133 + continue;
1.134 + }
1.135 + final String value = Uri.decode(pair[1]);
1.136 + if (TextUtils.isEmpty(value)) {
1.137 + return null;
1.138 + }
1.139 + return value;
1.140 + }
1.141 +
1.142 + return null;
1.143 + }
1.144 +
1.145 + public static boolean isFilterUrl(String url) {
1.146 + if (TextUtils.isEmpty(url)) {
1.147 + return false;
1.148 + }
1.149 +
1.150 + return url.startsWith(FILTER_URL_PREFIX);
1.151 + }
1.152 +
1.153 + public static String getFilterFromUrl(String url) {
1.154 + if (TextUtils.isEmpty(url)) {
1.155 + return null;
1.156 + }
1.157 +
1.158 + return url.substring(FILTER_URL_PREFIX.length());
1.159 + }
1.160 +}
