1/*
2 * Copyright (c) 2018, Daniel Gultsch All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without modification,
5 * are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice, this
8 * list of conditions and the following disclaimer.
9 *
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation and/or
12 * other materials provided with the distribution.
13 *
14 * 3. Neither the name of the copyright holder nor the names of its contributors
15 * may be used to endorse or promote products derived from this software without
16 * specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
25 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30package eu.siacs.conversations.ui.util;
31
32import android.net.Uri;
33import android.text.Editable;
34import android.text.style.URLSpan;
35import android.text.util.Linkify;
36import com.google.common.base.Splitter;
37import com.google.common.collect.Collections2;
38import com.google.common.collect.ImmutableList;
39import com.google.common.collect.Iterables;
40import com.google.common.collect.Lists;
41import eu.siacs.conversations.ui.text.FixedURLSpan;
42import eu.siacs.conversations.utils.Patterns;
43import eu.siacs.conversations.utils.XmppUri;
44import java.util.Arrays;
45import java.util.Collection;
46import java.util.Comparator;
47import java.util.List;
48import java.util.Objects;
49
50public class MyLinkify {
51
52 private static final Linkify.MatchFilter MATCH_FILTER =
53 (s, start, end) -> {
54 final var match = s.subSequence(start, end);
55 final var scheme =
56 Iterables.getFirst(Splitter.on(':').limit(2).splitToList(match), null);
57 if (scheme == null) {
58 return false;
59 }
60 return switch (scheme) {
61 case "tel" -> Patterns.URI_TEL.matcher(match).matches();
62 case "http", "https" -> Patterns.URI_HTTP.matcher(match).matches();
63 case "geo" -> Patterns.URI_GEO.matcher(match).matches();
64 case "xmpp" -> new XmppUri(Uri.parse(match.toString())).isValidJid();
65 case "web+ap" -> Patterns.URI_WEB_AP.matcher(match).matches();
66 default -> true;
67 };
68 };
69
70 public static void addLinks(final Editable body) {
71 Linkify.addLinks(body, Patterns.URI_GENERIC, null, MATCH_FILTER, null);
72 FixedURLSpan.fix(body);
73 }
74
75 public static List<String> extractLinks(final Editable body) {
76 MyLinkify.addLinks(body);
77 final Collection<URLSpan> spans =
78 Arrays.asList(body.getSpans(0, body.length() - 1, URLSpan.class));
79 final Collection<UrlWrapper> urlWrappers =
80 Collections2.filter(
81 Collections2.transform(
82 spans,
83 s ->
84 s == null
85 ? null
86 : new UrlWrapper(body.getSpanStart(s), s.getURL())),
87 Objects::nonNull);
88 List<UrlWrapper> sorted =
89 ImmutableList.sortedCopyOf(Comparator.comparingInt(a -> a.position), urlWrappers);
90 return Lists.transform(sorted, uw -> uw.url);
91 }
92
93 private static class UrlWrapper {
94 private final int position;
95 private final String url;
96
97 private UrlWrapper(int position, String url) {
98 this.position = position;
99 this.url = url;
100 }
101 }
102}