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@ -12,7 +12,7 @@ import kotlin.math.max |
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* @see <a href="https://github.com/tootsuite/mastodon/blob/master/app/models/tag.rb"> |
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* Tag#HASHTAG_RE</a>. |
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*/ |
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private const val TAG_REGEX = "(?:^|[^/)\\w])#([\\w_]*[\\p{Alpha}_][\\w_]*)" |
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private const val TAG_REGEX = "(?:^|[^/)A-Za-z0-9_])#([\\w_]*[\\p{Alpha}_][\\w_]*)" |
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/** |
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* @see <a href="https://github.com/tootsuite/mastodon/blob/master/app/models/account.rb"> |
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@ -30,10 +30,10 @@ private val STRICT_WEB_URL_PATTERN = Pattern.compile("(((?:(?i:http|https|rtsp): |
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private val spanClasses = listOf(ForegroundColorSpan::class.java, URLSpan::class.java) |
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private val finders = mapOf( |
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FoundMatchType.HTTP_URL to PatternFinder(':', HTTP_URL_REGEX, 5), |
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FoundMatchType.HTTPS_URL to PatternFinder(':', HTTPS_URL_REGEX, 6), |
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FoundMatchType.TAG to PatternFinder('#', TAG_REGEX, 1), |
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FoundMatchType.MENTION to PatternFinder('@', MENTION_REGEX, 1) |
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FoundMatchType.HTTP_URL to PatternFinder(':', HTTP_URL_REGEX, 5, Character::isWhitespace), |
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FoundMatchType.HTTPS_URL to PatternFinder(':', HTTPS_URL_REGEX, 6, Character::isWhitespace), |
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FoundMatchType.TAG to PatternFinder('#', TAG_REGEX, 1, ::isValidForTagPrefix), |
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FoundMatchType.MENTION to PatternFinder('@', MENTION_REGEX, 1, Character::isWhitespace) // TODO: We also need a proper validator for mentions |
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) |
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private enum class FoundMatchType { |
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@ -49,7 +49,8 @@ private class FindCharsResult { |
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var end: Int = -1 |
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} |
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private class PatternFinder(val searchCharacter: Char, regex: String, val searchPrefixWidth: Int) { |
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private class PatternFinder(val searchCharacter: Char, regex: String, val searchPrefixWidth: Int, |
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val prefixValidator: (Int) -> Boolean) { |
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val pattern: Pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE) |
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} |
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@ -67,7 +68,7 @@ private fun findPattern(string: String, fromIndex: Int): FindCharsResult { |
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val finder = finders[matchType] |
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if (finder!!.searchCharacter == c |
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&& ((i - fromIndex) < finder.searchPrefixWidth || |
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Character.isWhitespace(string.codePointAt(i - finder.searchPrefixWidth)))) { |
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finder.prefixValidator(string.codePointAt(i - finder.searchPrefixWidth)))) { |
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result.matchType = matchType |
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result.start = max(0, i - finder.searchPrefixWidth) |
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findEndOfPattern(string, result, finder.pattern) |
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@ -87,10 +88,22 @@ private fun findEndOfPattern(string: String, result: FindCharsResult, pattern: P |
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// Once we have API level 26+, we can use named captures... |
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val end = matcher.end() |
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result.start = matcher.start() |
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if (Character.isWhitespace(string.codePointAt(result.start))) { |
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++result.start |
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when (result.matchType) { |
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FoundMatchType.TAG -> { |
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if (isValidForTagPrefix(string.codePointAt(result.start))) { |
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if (string[result.start] != '#' || |
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(string[result.start] == '#' && string[result.start + 1] == '#')) { |
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++result.start |
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} |
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} |
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} |
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else -> { |
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if (Character.isWhitespace(string.codePointAt(result.start))) { |
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++result.start |
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} |
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} |
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} |
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when(result.matchType) { |
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when (result.matchType) { |
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FoundMatchType.HTTP_URL, FoundMatchType.HTTPS_URL -> { |
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// Preliminary url patterns are fast/permissive, now we'll do full validation |
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if (STRICT_WEB_URL_PATTERN.matcher(string.substring(result.start, end)).matches()) { |
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@ -133,3 +146,16 @@ fun highlightSpans(text: Spannable, colour: Int) { |
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} |
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} |
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} |
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private fun isWordCharacters(codePoint: Int): Boolean { |
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return (codePoint in 0x30..0x39) || // [0-9] |
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(codePoint in 0x41..0x5a) || // [A-Z] |
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(codePoint == 0x5f) || // _ |
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(codePoint in 0x61..0x7a) // [a-z] |
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} |
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private fun isValidForTagPrefix(codePoint: Int): Boolean { |
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return !(isWordCharacters(codePoint) || // \w |
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(codePoint == 0x2f) || // / |
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(codePoint == 0x29)) // ) |
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} |
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