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xepozzxepozz
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add basic language support
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7 files changed

+166
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‎src/main/kotlin/com/github/xepozz/crontab/language/CrontabAnnotator.kt‎

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package com.github.xepozz.crontab.language
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import com.github.xepozz.crontab.language.psi.CrontabSchedule
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import com.intellij.lang.annotation.AnnotationHolder
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import com.intellij.lang.annotation.Annotator
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import com.intellij.lang.annotation.HighlightSeverity
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import com.intellij.openapi.editor.DefaultLanguageHighlighterColors
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import com.intellij.openapi.editor.colors.TextAttributesKey
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import com.intellij.psi.PsiElement
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class CrontabAnnotator : Annotator {
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override fun annotate(element: PsiElement, holder: AnnotationHolder) {
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when (element) {
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is CrontabSchedule -> {
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holder.newSilentAnnotation(HighlightSeverity.INFORMATION)
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.range(element.textRange)
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.textAttributes(SCHEDULE_HIGHLIGHT)
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.create()
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}
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// is CrontabCommand -> {
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// holder.newSilentAnnotation(HighlightSeverity.INFORMATION)
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// .range(element.textRange)
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// .textAttributes(COMMAND_HIGHLIGHT)
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// .create()
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// }
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}
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}
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companion object {
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private val SCHEDULE_HIGHLIGHT = TextAttributesKey.createTextAttributesKey(
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"CRONTAB_SCHEDULE",
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DefaultLanguageHighlighterColors.FUNCTION_DECLARATION,
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)
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// private val COMMAND_HIGHLIGHT = TextAttributesKey.createTextAttributesKey(
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// "CRONTAB_COMMAND",
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// DefaultLanguageHighlighterColors.STRING,
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// )
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}
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}

‎src/main/kotlin/com/github/xepozz/crontab/language/CrontabLanguageInjector.kt‎

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package com.github.xepozz.crontab.language
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import com.github.xepozz.crontab.language.psi.CrontabCommand
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import com.intellij.lang.Language
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import com.intellij.lang.injection.MultiHostInjector
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import com.intellij.lang.injection.MultiHostRegistrar
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import com.intellij.openapi.util.TextRange
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import com.intellij.psi.PsiElement
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import com.intellij.psi.PsiLanguageInjectionHost
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class CrontabLanguageInjector : MultiHostInjector {
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val shellLanguage = Language.findLanguageByID("Shell Script")
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override fun getLanguagesToInject(registrar: MultiHostRegistrar, element: PsiElement) {
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if (shellLanguage == null) return
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when (element) {
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is CrontabCommand -> {
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registrar.startInjecting(shellLanguage)
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.addPlace(null, null, element, TextRange(0, element.textLength))
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.doneInjecting()
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}
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}
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}
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override fun elementsToInjectIn(): List<Class<out PsiElement>> {
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return listOf(PsiLanguageInjectionHost::class.java)
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}
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}

‎src/main/kotlin/com/github/xepozz/crontab/language/CrontabSyntaxHighlighter.kt‎

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package com.github.xepozz.crontab.language
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import com.github.xepozz.crontab.language.parser.CrontabLexerAdapter
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import com.github.xepozz.crontab.language.psi.CrontabTypes
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import com.intellij.openapi.editor.DefaultLanguageHighlighterColors
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import com.intellij.openapi.editor.HighlighterColors
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import com.intellij.openapi.editor.colors.TextAttributesKey
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import com.intellij.openapi.fileTypes.SyntaxHighlighterBase
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import com.intellij.psi.TokenType
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import com.intellij.psi.tree.IElementType
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class CrontabSyntaxHighlighter : SyntaxHighlighterBase() {
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override fun getHighlightingLexer() = CrontabLexerAdapter()
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override fun getTokenHighlights(tokenType: IElementType) = when (tokenType) {
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// CrontabTypes.SCHEDULE -> COMMENT_KEYS
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// CrontabTypes.TIME_POINTER -> CONSTANT_KEYS
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// CrontabTypes.COMMAND -> KEYWORD_KEYS
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CrontabTypes.COMMENT -> COMMENT_KEYS
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TokenType.BAD_CHARACTER -> BAD_CHAR_KEYS
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else -> EMPTY_KEYS
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}
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companion object {
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private val BAD_CHAR_KEYS = arrayOf(
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HighlighterColors.BAD_CHARACTER,
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)
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// private val KEYWORD_KEYS = arrayOf(
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// DefaultLanguageHighlighterColors.KEYWORD
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// )
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// private val CONSTANT_KEYS = arrayOf(
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// DefaultLanguageHighlighterColors.CONSTANT
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// )
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private val COMMENT_KEYS = arrayOf(
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DefaultLanguageHighlighterColors.DOC_COMMENT
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)
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private val EMPTY_KEYS = emptyArray<TextAttributesKey>()
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}
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}

‎src/main/kotlin/com/github/xepozz/crontab/language/CrontabSyntaxHighlighterFactory.kt‎

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package com.github.xepozz.crontab.language
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import com.intellij.openapi.fileTypes.SyntaxHighlighterFactory
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import com.intellij.openapi.project.Project
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import com.intellij.openapi.vfs.VirtualFile
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internal class CrontabSyntaxHighlighterFactory : SyntaxHighlighterFactory() {
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override fun getSyntaxHighlighter(project: Project?, virtualFile: VirtualFile?) = CrontabSyntaxHighlighter()
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}

‎src/main/kotlin/com/github/xepozz/crontab/language/parser/Crontab.bnf‎

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{
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pin=1
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}
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private TIME_POINTER ::= ((STAR SLASH NUMBER) | STAR | NUMBER)
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TIME_POINTER ::= ((STAR SLASH NUMBER) | STAR | NUMBER)
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COMMAND ::= CONTENT
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{
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implements=["com.intellij.psi.PsiLanguageInjectionHost"]
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extends="com.github.xepozz.crontab.language.psi.impl.CrontabCommandBaseImpl"
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}
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COMMENT ::= SINGLE_COMMENT

‎src/main/kotlin/com/github/xepozz/crontab/language/psi/impl/CrontabCommandBaseImpl.kt‎

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package com.github.xepozz.crontab.language.psi.impl
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import com.github.xepozz.crontab.language.psi.CrontabCommand
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import com.github.xepozz.crontab.language.psi.CrontabTypes
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import com.intellij.extapi.psi.ASTWrapperPsiElement
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import com.intellij.lang.ASTNode
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import com.intellij.psi.LiteralTextEscaper
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import com.intellij.psi.PsiLanguageInjectionHost
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import com.intellij.psi.impl.source.tree.LeafElement
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abstract class CrontabCommandBaseImpl : ASTWrapperPsiElement, CrontabCommand, PsiLanguageInjectionHost {
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constructor(node: ASTNode) : super(node)
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override fun getText(): String {
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val keyNode = this.node.findChildByType(CrontabTypes.CONTENT)
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return keyNode?.text ?: ""
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}
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override fun isValidHost() = true
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override fun updateText(newText: String): PsiLanguageInjectionHost? {
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val keyNode = this.node.findChildByType(CrontabTypes.CONTENT) as? LeafElement ?: return null
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keyNode.replaceWithText(newText)
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return this
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}
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override fun createLiteralTextEscaper(): LiteralTextEscaper<out PsiLanguageInjectionHost?> {
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return LiteralTextEscaper.createSimple(this, true)
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}
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}

‎src/main/resources/META-INF/plugin.xml‎

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implementationClass="com.github.xepozz.crontab.language.CrontabFileType"
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fieldName="INSTANCE"
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language="Crontab"
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extensions=""/>
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extensions="crontab,cron"
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/>
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<lang.parserDefinition
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language="Crontab"
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implementationClass="com.github.xepozz.crontab.language.parser.CrontabParserDefinition"/>
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<lang.syntaxHighlighterFactory
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language="Crontab"
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implementationClass="com.github.xepozz.crontab.language.CrontabSyntaxHighlighterFactory"/>
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<annotator
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language="Crontab"
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implementationClass="com.github.xepozz.crontab.language.CrontabAnnotator"/>
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<multiHostInjector
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implementation="com.github.xepozz.crontab.language.CrontabLanguageInjector"/>
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</extensions>
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</idea-plugin>

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