65 lines
1.5 KiB
Kotlin
65 lines
1.5 KiB
Kotlin
@file:JvmName("StringUtils")
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package com.keylesspalace.tusky.util
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import android.text.Spanned
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import java.util.Random
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private const val POSSIBLE_CHARS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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fun randomAlphanumericString(count: Int): String {
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val chars = CharArray(count)
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val random = Random()
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for (i in 0 until count) {
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chars[i] = POSSIBLE_CHARS[random.nextInt(POSSIBLE_CHARS.length)]
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}
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return String(chars)
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}
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/**
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* A < B (strictly) by length and then by content.
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* Examples:
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* "abc" < "bcd"
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* "ab" < "abc"
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* "cb" < "abc"
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* not: "ab" < "ab"
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* not: "abc" > "cb"
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*/
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fun String.isLessThan(other: String): Boolean {
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return when {
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this.length < other.length -> true
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this.length > other.length -> false
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else -> this < other
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}
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}
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/**
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* A <= B (strictly) by length and then by content.
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* Examples:
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* "abc" <= "bcd"
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* "ab" <= "abc"
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* "cb" <= "abc"
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* "ab" <= "ab"
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* not: "abc" > "cb"
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*/
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fun String.isLessThanOrEqual(other: String): Boolean {
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return this == other || isLessThan(other)
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}
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fun Spanned.trimTrailingWhitespace(): Spanned {
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var i = length
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do {
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i--
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} while (i >= 0 && get(i).isWhitespace())
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return subSequence(0, i + 1) as Spanned
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}
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/**
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* BidiFormatter.unicodeWrap is insufficient in some cases (see #1921)
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* So we force isolation manually
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* https://unicode.org/reports/tr9/#Explicit_Directional_Isolates
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*/
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fun CharSequence.unicodeWrap(): String {
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return "\u2068${this}\u2069"
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}
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