org.jetbrains.kotlin.parsing.KotlinWhitespaceAndCommentsBinders.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.parsing
import com.intellij.lang.WhitespacesAndCommentsBinder
import com.intellij.openapi.util.text.StringUtil
import com.intellij.psi.tree.IElementType
import org.jetbrains.kotlin.lexer.KtTokens
object PrecedingCommentsBinder : WhitespacesAndCommentsBinder {
override fun getEdgePosition(
tokens: List, atStreamEdge: Boolean, getter: WhitespacesAndCommentsBinder.TokenTextGetter
): Int {
if (tokens.isEmpty()) return 0
// 1. bind doc comment
for (idx in tokens.indices.reversed()) {
if (tokens[idx] == KtTokens.DOC_COMMENT) return idx
}
// 2. bind plain comments
var result = tokens.size
tokens@ for (idx in tokens.indices.reversed()) {
val tokenType = tokens[idx]
when (tokenType) {
KtTokens.WHITE_SPACE -> if (StringUtil.getLineBreakCount(getter[idx]) > 1) break@tokens
in KtTokens.COMMENTS -> {
if (idx == 0 || tokens[idx - 1] == KtTokens.WHITE_SPACE && StringUtil.containsLineBreak(getter[idx - 1])) {
result = idx
}
}
else -> break@tokens
}
}
return result
}
}
object PrecedingDocCommentsBinder : WhitespacesAndCommentsBinder {
override fun getEdgePosition(
tokens: List, atStreamEdge: Boolean, getter: WhitespacesAndCommentsBinder.TokenTextGetter
): Int {
if (tokens.isEmpty()) return 0
for (idx in tokens.indices.reversed()) {
if (tokens[idx] == KtTokens.DOC_COMMENT) return idx
}
return tokens.size
}
}
// Binds comments on the same line
object TrailingCommentsBinder : WhitespacesAndCommentsBinder {
override fun getEdgePosition(
tokens: List, atStreamEdge: Boolean, getter: WhitespacesAndCommentsBinder.TokenTextGetter
): Int {
if (tokens.isEmpty()) return 0
var result = 0
tokens@ for (idx in tokens.indices) {
val tokenType = tokens[idx]
when (tokenType) {
KtTokens.WHITE_SPACE -> if (StringUtil.containsLineBreak(getter[idx])) break@tokens
KtTokens.EOL_COMMENT, KtTokens.BLOCK_COMMENT -> result = idx + 1
else -> break@tokens
}
}
return result
}
}
private class AllCommentsBinder(val isTrailing: Boolean) : WhitespacesAndCommentsBinder {
override fun getEdgePosition(
tokens: List, atStreamEdge: Boolean, getter: WhitespacesAndCommentsBinder.TokenTextGetter
): Int {
if (tokens.isEmpty()) return 0
val size = tokens.size
// Skip one whitespace if needed. Expect that there can't be several consecutive whitespaces
val endToken = tokens[if (isTrailing) size - 1 else 0]
val shift = if (endToken == KtTokens.WHITE_SPACE) 1 else 0
return if (isTrailing) size - shift else shift
}
}
@JvmField
val PRECEDING_ALL_COMMENTS_BINDER: WhitespacesAndCommentsBinder = AllCommentsBinder(false)
@JvmField
val TRAILING_ALL_COMMENTS_BINDER: WhitespacesAndCommentsBinder = AllCommentsBinder(true)
object DoNotBindAnything : WhitespacesAndCommentsBinder {
override fun getEdgePosition(
tokens: List, atStreamEdge: Boolean, getter: WhitespacesAndCommentsBinder.TokenTextGetter
): Int {
return 0
}
}
object BindFirstShebangWithWhitespaceOnly : WhitespacesAndCommentsBinder {
override fun getEdgePosition(
tokens: List, atStreamEdge: Boolean, getter: WhitespacesAndCommentsBinder.TokenTextGetter
): Int {
if (tokens.firstOrNull() == KtTokens.SHEBANG_COMMENT) {
return if (tokens.getOrNull(1) == KtTokens.WHITE_SPACE) 2 else 1
}
return 0
}
}
class BindAll(val isTrailing: Boolean) : WhitespacesAndCommentsBinder {
override fun getEdgePosition(
tokens: List, atStreamEdge: Boolean, getter: WhitespacesAndCommentsBinder.TokenTextGetter
): Int {
return if (!isTrailing) 0 else tokens.size
}
}
@JvmField
val PRECEDING_ALL_BINDER: WhitespacesAndCommentsBinder = BindAll(false)
@JvmField
val TRAILING_ALL_BINDER: WhitespacesAndCommentsBinder = BindAll(true)