350 lines
17 KiB
Java
350 lines
17 KiB
Java
// Copyright 2018 Twitter, Inc.
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// Licensed under the Apache License, Version 2.0
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// http://www.apache.org/licenses/LICENSE-2.0
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package com.twitter.twittertext;
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import java.util.Collection;
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import java.util.Iterator;
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import java.util.regex.Pattern;
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import androidx.annotation.NonNull;
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public class Regex {
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protected Regex() {
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}
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private static final String URL_VALID_GTLD =
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"(?:(?:" +
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join(TldLists.GTLDS) +
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")(?=[^a-z0-9@+-]|$))";
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private static final String URL_VALID_CCTLD =
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"(?:(?:" +
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join(TldLists.CTLDS) +
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")(?=[^a-z0-9@+-]|$))";
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private static final String INVALID_CHARACTERS =
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"\\uFFFE" + // BOM
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"\\uFEFF" + // BOM
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"\\uFFFF"; // Special
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private static final String DIRECTIONAL_CHARACTERS =
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"\\u061C" + // ARABIC LETTER MARK (ALM)
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"\\u200E" + // LEFT-TO-RIGHT MARK (LRM)
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"\\u200F" + // RIGHT-TO-LEFT MARK (RLM)
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"\\u202A" + // LEFT-TO-RIGHT EMBEDDING (LRE)
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"\\u202B" + // RIGHT-TO-LEFT EMBEDDING (RLE)
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"\\u202C" + // POP DIRECTIONAL FORMATTING (PDF)
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"\\u202D" + // LEFT-TO-RIGHT OVERRIDE (LRO)
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"\\u202E" + // RIGHT-TO-LEFT OVERRIDE (RLO)
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"\\u2066" + // LEFT-TO-RIGHT ISOLATE (LRI)
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"\\u2067" + // RIGHT-TO-LEFT ISOLATE (RLI)
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"\\u2068" + // FIRST STRONG ISOLATE (FSI)
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"\\u2069"; // POP DIRECTIONAL ISOLATE (PDI)
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private static final String UNICODE_SPACES = "[" +
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"\\u0009-\\u000d" + // # White_Space # Cc [5] <control-0009>..<control-000D>
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"\\u0020" + // White_Space # Zs SPACE
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"\\u0085" + // White_Space # Cc <control-0085>
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"\\u00a0" + // White_Space # Zs NO-BREAK SPACE
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"\\u1680" + // White_Space # Zs OGHAM SPACE MARK
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"\\u180E" + // White_Space # Zs MONGOLIAN VOWEL SEPARATOR
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"\\u2000-\\u200a" + // # White_Space # Zs [11] EN QUAD..HAIR SPACE
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"\\u2028" + // White_Space # Zl LINE SEPARATOR
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"\\u2029" + // White_Space # Zp PARAGRAPH SEPARATOR
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"\\u202F" + // White_Space # Zs NARROW NO-BREAK SPACE
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"\\u205F" + // White_Space # Zs MEDIUM MATHEMATICAL SPACE
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"\\u3000" + // White_Space # Zs IDEOGRAPHIC SPACE
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"]";
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private static final String LATIN_ACCENTS_CHARS =
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// Latin-1
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"\\u00c0-\\u00d6\\u00d8-\\u00f6\\u00f8-\\u00ff" +
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// Latin Extended A and B
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"\\u0100-\\u024f" +
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// IPA Extensions
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"\\u0253\\u0254\\u0256\\u0257\\u0259\\u025b\\u0263\\u0268\\u026f\\u0272\\u0289\\u028b" +
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// Hawaiian
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"\\u02bb" +
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// Combining diacritics
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"\\u0300-\\u036f" +
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// Latin Extended Additional (mostly for Vietnamese)
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"\\u1e00-\\u1eff";
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private static final String CYRILLIC_CHARS = "\\u0400-\\u04ff";
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// Generated from unicode_regex/unicode_regex_groups.scala, more inclusive than Java's \p{L}\p{M}
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private static final String HASHTAG_LETTERS_AND_MARKS = "\\p{L}\\p{M}" +
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"\\u037f\\u0528-\\u052f\\u08a0-\\u08b2\\u08e4-\\u08ff\\u0978\\u0980\\u0c00\\u0c34\\u0c81" +
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"\\u0d01\\u0ede\\u0edf\\u10c7\\u10cd\\u10fd-\\u10ff\\u16f1-\\u16f8\\u17b4\\u17b5\\u191d" +
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"\\u191e\\u1ab0-\\u1abe\\u1bab-\\u1bad\\u1bba-\\u1bbf\\u1cf3-\\u1cf6\\u1cf8\\u1cf9" +
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"\\u1de7-\\u1df5\\u2cf2\\u2cf3\\u2d27\\u2d2d\\u2d66\\u2d67\\u9fcc\\ua674-\\ua67b\\ua698" +
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"-\\ua69d\\ua69f\\ua792-\\ua79f\\ua7aa-\\ua7ad\\ua7b0\\ua7b1\\ua7f7-\\ua7f9\\ua9e0-" +
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"\\ua9ef\\ua9fa-\\ua9fe\\uaa7c-\\uaa7f\\uaae0-\\uaaef\\uaaf2-\\uaaf6\\uab30-\\uab5a" +
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"\\uab5c-\\uab5f\\uab64\\uab65\\uf870-\\uf87f\\uf882\\uf884-\\uf89f\\uf8b8\\uf8c1-" +
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"\\uf8d6\\ufa2e\\ufa2f\\ufe27-\\ufe2d\\ud800\\udee0\\ud800\\udf1f\\ud800\\udf50-\\ud800" +
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"\\udf7a\\ud801\\udd00-\\ud801\\udd27\\ud801\\udd30-\\ud801\\udd63\\ud801\\ude00-\\ud801" +
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"\\udf36\\ud801\\udf40-\\ud801\\udf55\\ud801\\udf60-\\ud801\\udf67\\ud802\\udc60-\\ud802" +
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"\\udc76\\ud802\\udc80-\\ud802\\udc9e\\ud802\\udd80-\\ud802\\uddb7\\ud802\\uddbe\\ud802" +
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"\\uddbf\\ud802\\ude80-\\ud802\\ude9c\\ud802\\udec0-\\ud802\\udec7\\ud802\\udec9-\\ud802" +
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"\\udee6\\ud802\\udf80-\\ud802\\udf91\\ud804\\udc7f\\ud804\\udcd0-\\ud804\\udce8\\ud804" +
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"\\udd00-\\ud804\\udd34\\ud804\\udd50-\\ud804\\udd73\\ud804\\udd76\\ud804\\udd80-\\ud804" +
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"\\uddc4\\ud804\\uddda\\ud804\\ude00-\\ud804\\ude11\\ud804\\ude13-\\ud804\\ude37\\ud804" +
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"\\udeb0-\\ud804\\udeea\\ud804\\udf01-\\ud804\\udf03\\ud804\\udf05-\\ud804\\udf0c\\ud804" +
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"\\udf0f\\ud804\\udf10\\ud804\\udf13-\\ud804\\udf28\\ud804\\udf2a-\\ud804\\udf30\\ud804" +
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"\\udf32\\ud804\\udf33\\ud804\\udf35-\\ud804\\udf39\\ud804\\udf3c-\\ud804\\udf44\\ud804" +
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"\\udf47\\ud804\\udf48\\ud804\\udf4b-\\ud804\\udf4d\\ud804\\udf57\\ud804\\udf5d-\\ud804" +
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"\\udf63\\ud804\\udf66-\\ud804\\udf6c\\ud804\\udf70-\\ud804\\udf74\\ud805\\udc80-\\ud805" +
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"\\udcc5\\ud805\\udcc7\\ud805\\udd80-\\ud805\\uddb5\\ud805\\uddb8-\\ud805\\uddc0\\ud805" +
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"\\ude00-\\ud805\\ude40\\ud805\\ude44\\ud805\\ude80-\\ud805\\udeb7\\ud806\\udca0-\\ud806" +
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"\\udcdf\\ud806\\udcff\\ud806\\udec0-\\ud806\\udef8\\ud808\\udf6f-\\ud808\\udf98\\ud81a" +
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"\\ude40-\\ud81a\\ude5e\\ud81a\\uded0-\\ud81a\\udeed\\ud81a\\udef0-\\ud81a\\udef4\\ud81a" +
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"\\udf00-\\ud81a\\udf36\\ud81a\\udf40-\\ud81a\\udf43\\ud81a\\udf63-\\ud81a\\udf77\\ud81a" +
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"\\udf7d-\\ud81a\\udf8f\\ud81b\\udf00-\\ud81b\\udf44\\ud81b\\udf50-\\ud81b\\udf7e\\ud81b" +
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"\\udf8f-\\ud81b\\udf9f\\ud82f\\udc00-\\ud82f\\udc6a\\ud82f\\udc70-\\ud82f\\udc7c\\ud82f" +
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"\\udc80-\\ud82f\\udc88\\ud82f\\udc90-\\ud82f\\udc99\\ud82f\\udc9d\\ud82f\\udc9e\\ud83a" +
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"\\udc00-\\ud83a\\udcc4\\ud83a\\udcd0-\\ud83a\\udcd6\\ud83b\\ude00-\\ud83b\\ude03\\ud83b" +
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"\\ude05-\\ud83b\\ude1f\\ud83b\\ude21\\ud83b\\ude22\\ud83b\\ude24\\ud83b\\ude27\\ud83b" +
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"\\ude29-\\ud83b\\ude32\\ud83b\\ude34-\\ud83b\\ude37\\ud83b\\ude39\\ud83b\\ude3b\\ud83b" +
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"\\ude42\\ud83b\\ude47\\ud83b\\ude49\\ud83b\\ude4b\\ud83b\\ude4d-\\ud83b\\ude4f\\ud83b" +
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"\\ude51\\ud83b\\ude52\\ud83b\\ude54\\ud83b\\ude57\\ud83b\\ude59\\ud83b\\ude5b\\ud83b" +
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"\\ude5d\\ud83b\\ude5f\\ud83b\\ude61\\ud83b\\ude62\\ud83b\\ude64\\ud83b\\ude67-\\ud83b" +
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"\\ude6a\\ud83b\\ude6c-\\ud83b\\ude72\\ud83b\\ude74-\\ud83b\\ude77\\ud83b\\ude79-\\ud83b" +
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"\\ude7c\\ud83b\\ude7e\\ud83b\\ude80-\\ud83b\\ude89\\ud83b\\ude8b-\\ud83b\\ude9b\\ud83b" +
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"\\udea1-\\ud83b\\udea3\\ud83b\\udea5-\\ud83b\\udea9\\ud83b\\udeab-\\ud83b\\udebb";
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// Generated from unicode_regex/unicode_regex_groups.scala, more inclusive than Java's \p{Nd}
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private static final String HASHTAG_NUMERALS = "\\p{Nd}" +
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"\\u0de6-\\u0def\\ua9f0-\\ua9f9\\ud804\\udcf0-\\ud804\\udcf9\\ud804\\udd36-\\ud804" +
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"\\udd3f\\ud804\\uddd0-\\ud804\\uddd9\\ud804\\udef0-\\ud804\\udef9\\ud805\\udcd0-\\ud805" +
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"\\udcd9\\ud805\\ude50-\\ud805\\ude59\\ud805\\udec0-\\ud805\\udec9\\ud806\\udce0-\\ud806" +
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"\\udce9\\ud81a\\ude60-\\ud81a\\ude69\\ud81a\\udf50-\\ud81a\\udf59";
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private static final String HASHTAG_SPECIAL_CHARS = "_" + //underscore
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"\\u200c" + // ZERO WIDTH NON-JOINER (ZWNJ)
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"\\u200d" + // ZERO WIDTH JOINER (ZWJ)
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"\\ua67e" + // CYRILLIC KAVYKA
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"\\u05be" + // HEBREW PUNCTUATION MAQAF
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"\\u05f3" + // HEBREW PUNCTUATION GERESH
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"\\u05f4" + // HEBREW PUNCTUATION GERSHAYIM
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"\\uff5e" + // FULLWIDTH TILDE
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"\\u301c" + // WAVE DASH
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"\\u309b" + // KATAKANA-HIRAGANA VOICED SOUND MARK
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"\\u309c" + // KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK
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"\\u30a0" + // KATAKANA-HIRAGANA DOUBLE HYPHEN
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"\\u30fb" + // KATAKANA MIDDLE DOT
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"\\u3003" + // DITTO MARK
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"\\u0f0b" + // TIBETAN MARK INTERSYLLABIC TSHEG
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"\\u0f0c" + // TIBETAN MARK DELIMITER TSHEG BSTAR
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"\\u00b7"; // MIDDLE DOT
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private static final String HASHTAG_LETTERS_NUMERALS =
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HASHTAG_LETTERS_AND_MARKS + HASHTAG_NUMERALS + HASHTAG_SPECIAL_CHARS;
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private static final String HASHTAG_LETTERS_SET = "[" + HASHTAG_LETTERS_AND_MARKS + "]";
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private static final String HASHTAG_LETTERS_NUMERALS_SET = "[" + HASHTAG_LETTERS_NUMERALS + "]";
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/* URL related hash regex collection */
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public static final String URL_VALID_PRECEDING_CHARS =
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"(?:[^a-z0-9@＠$#＃" + INVALID_CHARACTERS + "]|[" + DIRECTIONAL_CHARACTERS + "]|^)";
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private static final String URL_VALID_CHARS = "[a-z0-9" + LATIN_ACCENTS_CHARS + "]";
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private static final String URL_VALID_SUBDOMAIN =
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"(?>(?:" + URL_VALID_CHARS + "[" + URL_VALID_CHARS + "\\-_]*)?" + URL_VALID_CHARS + "\\.)";
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private static final String URL_VALID_DOMAIN_NAME =
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"(?:(?:" + URL_VALID_CHARS + "[" + URL_VALID_CHARS + "\\-]*)?" + URL_VALID_CHARS + "\\.)";
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private static final String PUNCTUATION_CHARS = "-_!\"#$%&'\\(\\)*+,./:;<=>?@\\[\\]^`\\{|}~";
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// Any non-space, non-punctuation characters.
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// \p{Z} = any kind of whitespace or invisible separator.
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private static final String URL_VALID_UNICODE_CHARS =
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"[^" + PUNCTUATION_CHARS + "\\s\\p{Z}\\p{InGeneralPunctuation}]";
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private static final String URL_VALID_UNICODE_DOMAIN_NAME =
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"(?:(?:" + URL_VALID_UNICODE_CHARS + "[" + URL_VALID_UNICODE_CHARS + "\\-]*)?" +
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URL_VALID_UNICODE_CHARS + "\\.)";
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private static final String URL_PUNYCODE = "(?:xn--[-0-9a-z]+)";
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public static final String URL_VALID_DOMAIN =
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"(?:" + // optional sub-domain + domain + TLD
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URL_VALID_SUBDOMAIN + "*" + URL_VALID_DOMAIN_NAME + // e.g. twitter.com, foo.co.jp ...
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"(?:" + URL_VALID_GTLD + "|" + URL_VALID_CCTLD + "|" + URL_PUNYCODE + ")" +
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")" +
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"|(?:" + "(?<=https?://)" +
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"(?:" +
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"(?:" + URL_VALID_DOMAIN_NAME + URL_VALID_CCTLD + ")" + // protocol + domain + ccTLD
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"|(?:" +
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URL_VALID_UNICODE_DOMAIN_NAME + // protocol + unicode domain + TLD
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"(?:" + URL_VALID_GTLD + "|" + URL_VALID_CCTLD + ")" +
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")" +
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")" +
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")" +
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"|(?:" + // domain + ccTLD + '/'
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URL_VALID_DOMAIN_NAME + URL_VALID_CCTLD + "(?=/)" + // e.g. t.co/
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")";
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public static final String URL_VALID_PORT_NUMBER = "[0-9]++";
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private static final String URL_VALID_GENERAL_PATH_CHARS =
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"[a-z0-9!\\*';:=\\+,.\\$/%#\\[\\]\\-\\u2013_~\\|&@" +
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LATIN_ACCENTS_CHARS + CYRILLIC_CHARS + "]";
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/**
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* Allow URL paths to contain up to two nested levels of balanced parens
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* 1. Used in Wikipedia URLs like /Primer_(film)
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* 2. Used in IIS sessions like /S(dfd346)/
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* 3. Used in Rdio URLs like /track/We_Up_(Album_Version_(Edited))/
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*/
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private static final String URL_BALANCED_PARENS = "\\(" +
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"(?:" +
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URL_VALID_GENERAL_PATH_CHARS + "+" +
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"|" +
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// allow one nested level of balanced parentheses
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"(?:" +
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URL_VALID_GENERAL_PATH_CHARS + "*" +
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"\\(" +
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URL_VALID_GENERAL_PATH_CHARS + "+" +
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"\\)" +
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URL_VALID_GENERAL_PATH_CHARS + "*" +
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")" +
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")" +
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"\\)";
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/**
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* Valid end-of-path characters (so /foo. does not gobble the period).
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* 2. Allow =&# for empty URL parameters and other URL-join artifacts
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*/
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private static final String URL_VALID_PATH_ENDING_CHARS =
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"[a-z0-9=_#/\\-\\+" + LATIN_ACCENTS_CHARS + CYRILLIC_CHARS + "]|(?:" +
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URL_BALANCED_PARENS + ")";
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public static final String URL_VALID_PATH = "(?:" +
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"(?:" +
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URL_VALID_GENERAL_PATH_CHARS + "*" +
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"(?:" + URL_BALANCED_PARENS + URL_VALID_GENERAL_PATH_CHARS + "*)*" +
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URL_VALID_PATH_ENDING_CHARS +
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")|(?:@" + URL_VALID_GENERAL_PATH_CHARS + "+/)" +
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")";
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public static final String URL_VALID_URL_QUERY_CHARS =
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"[a-z0-9!?\\*'\\(\\);:&=\\+\\$/%#\\[\\]\\-_\\.,~\\|@]";
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public static final String URL_VALID_URL_QUERY_ENDING_CHARS = "[a-z0-9\\-_&=#/]";
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private static final String VALID_URL_PATTERN_STRING =
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"(" + // $1 total match
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"(" + URL_VALID_PRECEDING_CHARS + ")" + // $2 Preceding character
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"(" + // $3 URL
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"(https?://)?" + // $4 Protocol (optional)
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"(" + URL_VALID_DOMAIN + ")" + // $5 Domain(s)
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"(?::(" + URL_VALID_PORT_NUMBER + "))?" + // $6 Port number (optional)
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"(/" +
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URL_VALID_PATH + "*+" +
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")?" + // $7 URL Path and anchor
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"(\\?" + URL_VALID_URL_QUERY_CHARS + "*" + // $8 Query String
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URL_VALID_URL_QUERY_ENDING_CHARS + ")?" +
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")" +
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")";
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private static final String AT_SIGNS_CHARS = "@\uFF20";
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private static final String DOLLAR_SIGN_CHAR = "\\$";
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private static final String CASHTAG = "[a-z]{1,6}(?:[._][a-z]{1,2})?";
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/* Begin public constants */
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public static final Pattern INVALID_CHARACTERS_PATTERN;
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public static final Pattern VALID_HASHTAG;
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public static final int VALID_HASHTAG_GROUP_BEFORE = 1;
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public static final int VALID_HASHTAG_GROUP_HASH = 2;
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public static final int VALID_HASHTAG_GROUP_TAG = 3;
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public static final Pattern INVALID_HASHTAG_MATCH_END;
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public static final Pattern RTL_CHARACTERS;
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public static final Pattern AT_SIGNS;
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public static final Pattern VALID_MENTION_OR_LIST;
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public static final int VALID_MENTION_OR_LIST_GROUP_BEFORE = 1;
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public static final int VALID_MENTION_OR_LIST_GROUP_AT = 2;
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public static final int VALID_MENTION_OR_LIST_GROUP_USERNAME = 3;
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public static final int VALID_MENTION_OR_LIST_GROUP_LIST = 4;
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public static final Pattern VALID_REPLY;
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public static final int VALID_REPLY_GROUP_USERNAME = 1;
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public static final Pattern INVALID_MENTION_MATCH_END;
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/**
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* Regex to extract URL (it also includes the text preceding the url).
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*
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* This regex does not reflect its name and {@link Regex#VALID_URL_GROUP_URL} match
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* should be checked in order to match a valid url. This is not ideal, but the behavior is
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* being kept to ensure backwards compatibility. Ideally this regex should be
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* implemented with a negative lookbehind as opposed to a negated character class
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* but lack of JS support increases maint overhead if the logic is different by
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* platform.
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*/
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public static final Pattern VALID_URL;
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public static final int VALID_URL_GROUP_ALL = 1;
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public static final int VALID_URL_GROUP_BEFORE = 2;
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public static final int VALID_URL_GROUP_URL = 3;
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public static final int VALID_URL_GROUP_PROTOCOL = 4;
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public static final int VALID_URL_GROUP_DOMAIN = 5;
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public static final int VALID_URL_GROUP_PORT = 6;
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public static final int VALID_URL_GROUP_PATH = 7;
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public static final int VALID_URL_GROUP_QUERY_STRING = 8;
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public static final Pattern VALID_TCO_URL;
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public static final Pattern INVALID_URL_WITHOUT_PROTOCOL_MATCH_BEGIN;
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public static final Pattern VALID_CASHTAG;
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public static final int VALID_CASHTAG_GROUP_BEFORE = 1;
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public static final int VALID_CASHTAG_GROUP_DOLLAR = 2;
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public static final int VALID_CASHTAG_GROUP_CASHTAG = 3;
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public static final Pattern VALID_DOMAIN;
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// initializing in a static synchronized block,
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// there appears to be thread safety issues with Pattern.compile in android
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static {
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synchronized (Regex.class) {
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INVALID_CHARACTERS_PATTERN = Pattern.compile(".*[" + INVALID_CHARACTERS + "].*");
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VALID_HASHTAG = Pattern.compile("(^|\\uFE0E|\\uFE0F|[^&" + HASHTAG_LETTERS_NUMERALS +
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"])([#\uFF03])(?![\uFE0F\u20E3])(" + HASHTAG_LETTERS_NUMERALS_SET + "*" +
|
||
HASHTAG_LETTERS_SET + HASHTAG_LETTERS_NUMERALS_SET + "*)", Pattern.CASE_INSENSITIVE);
|
||
INVALID_HASHTAG_MATCH_END = Pattern.compile("^(?:[#＃]|://)");
|
||
RTL_CHARACTERS = Pattern.compile("[\u0600-\u06FF\u0750-\u077F\u0590-\u05FF\uFE70-\uFEFF]");
|
||
AT_SIGNS = Pattern.compile("[" + AT_SIGNS_CHARS + "]");
|
||
VALID_MENTION_OR_LIST = Pattern.compile("([^a-z0-9_!#$%&*" + AT_SIGNS_CHARS +
|
||
"]|^|(?:^|[^a-z0-9_+~.-])RT:?)(" + AT_SIGNS +
|
||
"+)([a-z0-9_]{1,20})(/[a-z][a-z0-9_\\-]{0,24})?", Pattern.CASE_INSENSITIVE);
|
||
VALID_REPLY = Pattern.compile("^(?:" + UNICODE_SPACES + "|" + DIRECTIONAL_CHARACTERS + ")*" +
|
||
AT_SIGNS + "([a-z0-9_]{1,20})", Pattern.CASE_INSENSITIVE);
|
||
INVALID_MENTION_MATCH_END =
|
||
Pattern.compile("^(?:[" + AT_SIGNS_CHARS + LATIN_ACCENTS_CHARS + "]|://)");
|
||
INVALID_URL_WITHOUT_PROTOCOL_MATCH_BEGIN = Pattern.compile("[-_./]$");
|
||
|
||
VALID_URL = Pattern.compile(VALID_URL_PATTERN_STRING, Pattern.CASE_INSENSITIVE);
|
||
VALID_TCO_URL = Pattern.compile("^https?://t\\.co/([a-z0-9]+)(?:\\?" +
|
||
URL_VALID_URL_QUERY_CHARS + "*" + URL_VALID_URL_QUERY_ENDING_CHARS + ")?",
|
||
Pattern.CASE_INSENSITIVE);
|
||
VALID_CASHTAG = Pattern.compile("(^|" + UNICODE_SPACES + "|" + DIRECTIONAL_CHARACTERS + ")(" +
|
||
DOLLAR_SIGN_CHAR + ")(" + CASHTAG + ")" + "(?=$|\\s|\\p{Punct})",
|
||
Pattern.CASE_INSENSITIVE);
|
||
VALID_DOMAIN = Pattern.compile(URL_VALID_DOMAIN, Pattern.CASE_INSENSITIVE);
|
||
}
|
||
}
|
||
|
||
private static String join(@NonNull Collection<?> col) {
|
||
final StringBuilder sb = new StringBuilder();
|
||
final Iterator<?> iter = col.iterator();
|
||
if (iter.hasNext()) {
|
||
sb.append(iter.next().toString());
|
||
}
|
||
while (iter.hasNext()) {
|
||
sb.append("|");
|
||
sb.append(iter.next().toString());
|
||
}
|
||
return sb.toString();
|
||
}
|
||
}
|