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.text.Editable;
33import android.text.style.URLSpan;
34import android.text.util.Linkify;
35import com.google.common.base.Splitter;
36import com.google.common.collect.Collections2;
37import com.google.common.collect.ImmutableList;
38import com.google.common.collect.Iterables;
39import com.google.common.collect.Lists;
40import eu.siacs.conversations.ui.text.FixedURLSpan;
41import eu.siacs.conversations.utils.Patterns;
42import java.util.Arrays;
43import java.util.Collection;
44import java.util.Comparator;
45import java.util.List;
46import java.util.Objects;
47
48public class MyLinkify {
49
50 private static final Linkify.MatchFilter MATCH_FILTER =
51 (s, start, end) -> {
52 final var match = s.subSequence(start, end);
53 final var scheme =
54 Iterables.getFirst(Splitter.on(':').limit(2).splitToList(match), null);
55 if (scheme == null) {
56 return false;
57 }
58 return switch (scheme) {
59 case "tel" -> Patterns.URI_TEL.matcher(match).matches();
60 case "http", "https" -> Patterns.URI_HTTP.matcher(match).matches();
61 case "geo" -> Patterns.URI_GEO.matcher(match).matches();
62 default -> true;
63 };
64 };
65
66 public static void addLinks(final Editable body) {
67 Linkify.addLinks(body, Patterns.URI_GENERIC, null, MATCH_FILTER, null);
68 FixedURLSpan.fix(body);
69 }
70
71 public static List<String> extractLinks(final Editable body) {
72 MyLinkify.addLinks(body);
73 final Collection<URLSpan> spans =
74 Arrays.asList(body.getSpans(0, body.length() - 1, URLSpan.class));
75 final Collection<UrlWrapper> urlWrappers =
76 Collections2.filter(
77 Collections2.transform(
78 spans,
79 s ->
80 s == null
81 ? null
82 : new UrlWrapper(body.getSpanStart(s), s.getURL())),
83 Objects::nonNull);
84 List<UrlWrapper> sorted =
85 ImmutableList.sortedCopyOf(Comparator.comparingInt(a -> a.position), urlWrappers);
86 return Lists.transform(sorted, uw -> uw.url);
87 }
88
89 private static class UrlWrapper {
90 private final int position;
91 private final String url;
92
93 private UrlWrapper(int position, String url) {
94 this.position = position;
95 this.url = url;
96 }
97 }
98}