org.jetbrains.kotlin.js.parser.OffsetToSourceMapping.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2017 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.js.parser
import com.google.gwt.dev.js.rhino.CodePosition
class OffsetToSourceMapping(text: String) {
private val data: IntArray
init {
val lineSeparators = LINE_SEPARATOR.findAll(text).map { it.range.endInclusive + 1 }
data = (sequenceOf(0) + lineSeparators).toList().toIntArray()
}
operator fun get(offset: Int): CodePosition {
val lineNumber = data.binarySearch(offset).let { if (it >= 0) it else -it - 2 }
return CodePosition(lineNumber, offset - data[lineNumber])
}
private companion object {
private val LINE_SEPARATOR = Regex("\\r\\n|\\r|\\n")
}
}