CustomMarkAnnotator.kt

package de.dieploegers.develop.idea.custommark.annotators

import com.intellij.lang.annotation.AnnotationHolder
import com.intellij.lang.annotation.Annotator
import com.intellij.lang.annotation.HighlightSeverity
import com.intellij.openapi.editor.markup.EffectType
import com.intellij.openapi.editor.markup.TextAttributes
import com.intellij.psi.PsiElement
import java.awt.Color

class CustomMarkAnnotator : Annotator {
    override fun annotate(psiElement: PsiElement, annotationHolder: AnnotationHolder) {
        val value = psiElement.text

        if (value != null && (value as String).matches(Regex(".*abab.*"))) {
            val annotation = annotationHolder.createAnnotation(
                HighlightSeverity("MARK", 9000),
                psiElement.textRange,
                null
            )
            annotation.enforcedTextAttributes = TextAttributes.ERASE_MARKER
            annotation.enforcedTextAttributes.backgroundColor = Color(255, 0, 0)
            annotation.enforcedTextAttributes.foregroundColor = Color(255, 255, 255)
            annotation.enforcedTextAttributes.effectType = EffectType.BOXED
            annotation.setNeedsUpdateOnTyping(false)
            annotation.isAfterEndOfLine = true

        }
    }
}