org.jetbrains.kotlin.util.capitalizeDecapitalize.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.util.capitalizeDecapitalize
/**
* "FooBar" -> "fooBar"
* "FOOBar" -> "fooBar"
* "FOO" -> "foo"
*/
public fun String.decapitalizeSmart(): String {
if (isEmpty() || !charAt(0).isUpperCase()) return this
if (length() == 1 || !charAt(1).isUpperCase()) {
return decapitalize()
}
val secondWordStart = (indices.firstOrNull { !charAt(it).isUpperCase() }
?: return toLowerCase()) - 1
return substring(0, secondWordStart).toLowerCase() + substring(secondWordStart)
}
/**
* "fooBar" -> "FOOBar"
* "FooBar" -> "FOOBar"
* "foo" -> "FOO"
*/
public fun String.capitalizeFirstWord(): String {
val secondWordStart = indices.drop(1).firstOrNull { !charAt(it).isLowerCase() }
?: return toUpperCase()
return substring(0, secondWordStart).toUpperCase() + substring(secondWordStart)
}