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// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
package org.jetbrains.kotlin.idea
import com.intellij.codeInsight.hint.DeclarationRangeUtil
import com.intellij.lang.BracePair
import com.intellij.lang.PairedBraceMatcher
import com.intellij.psi.PsiFile
import com.intellij.psi.tree.IElementType
import org.jetbrains.kotlin.lexer.KtTokens
import org.jetbrains.kotlin.psi.KtBlockExpression
import org.jetbrains.kotlin.psi.KtClassBody
class KotlinPairMatcher : PairedBraceMatcher {
private val pairs = arrayOf(
BracePair(KtTokens.LPAR, KtTokens.RPAR, false),
BracePair(KtTokens.LONG_TEMPLATE_ENTRY_START, KtTokens.LONG_TEMPLATE_ENTRY_END, false),
BracePair(KtTokens.LBRACE, KtTokens.RBRACE, true),
BracePair(KtTokens.LBRACKET, KtTokens.RBRACKET, false),
BracePair(KtTokens.LT, KtTokens.GT, false),
)
override fun getPairs(): Array<BracePair> = pairs
override fun isPairedBracesAllowedBeforeType(lbraceType: IElementType, contextType: IElementType?): Boolean {
return if (lbraceType == KtTokens.LONG_TEMPLATE_ENTRY_START) {
// KotlinTypedHandler insert paired brace in this case
false
} else KtTokens.WHITE_SPACE_OR_COMMENT_BIT_SET.contains(contextType)
|| contextType === KtTokens.COLON
|| contextType === KtTokens.SEMICOLON
|| contextType === KtTokens.COMMA
|| contextType === KtTokens.RPAR
|| contextType === KtTokens.RBRACKET
|| contextType === KtTokens.RBRACE
|| contextType === KtTokens.LBRACE
|| contextType === KtTokens.LONG_TEMPLATE_ENTRY_END
}
override fun getCodeConstructStart(file: PsiFile, openingBraceOffset: Int): Int {
val element = file.findElementAt(openingBraceOffset)
if (element == null || element is PsiFile) return openingBraceOffset
return when (val parent = element.parent) {
is KtClassBody, is KtBlockExpression ->
DeclarationRangeUtil.getPossibleDeclarationAtRange(parent.parent)?.startOffset ?: openingBraceOffset
else -> openingBraceOffset
}
}
}
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