Mini-plugin for paragraph navigation in IntelliJ IDEs (to be use with https://github.com/dkandalov/live-plugin)

plugin.kts

import com.intellij.openapi.command.executeCommand
import com.intellij.openapi.editor.Editor
import com.intellij.openapi.editor.EditorModificationUtil
import com.intellij.openapi.editor.LogicalPosition
import com.intellij.openapi.editor.ScrollType.CENTER_DOWN
import com.intellij.openapi.fileEditor.ex.IdeDocumentHistory
import liveplugin.editor
import liveplugin.registerAction

registerAction("Previous Paragraph", "alt shift COMMA") { event ->
    event.editor?.moveToLine { lineIndex, lines ->
        val i = (lineIndex - 1).downTo(0)
            .dropWhile { lines[it].isBlank() }
            .dropWhile { lines[it].isNotBlank() }
            .firstOrNull() ?: 0
        if (lines[i].isBlank() && i + 1 in lines.indices && lines[i + 1].isNotBlank()) i + 1 else i
    }
}

registerAction("Next Paragraph", "alt shift PERIOD") { event ->
    event.editor?.moveToLine { lineIndex, lines ->
        (lineIndex..lines.lastIndex)
            .dropWhile { lines[it].isNotBlank() }
            .dropWhile { lines[it].isBlank() }
            .firstOrNull() ?: lines.lastIndex
    }
}

fun Editor.moveToLine(findLine: (Int, List<String>) -> Int) {
    executeCommand {
        val lines = document.text.lines()
        val lineIndex = findLine(caretModel.logicalPosition.line, lines)
        val columnIndex = lines[lineIndex]
            .indexOfFirst { !it.isWhitespace() }
            .let { if (it == -1) 0 else it }

        caretModel.moveToLogicalPosition(LogicalPosition(lineIndex, columnIndex))
        caretModel.removeSecondaryCarets()
        caretModel.currentCaret.removeSelection()
        scrollingModel.scrollToCaret(CENTER_DOWN)
        EditorModificationUtil.scrollToCaret(this)
        IdeDocumentHistory.getInstance(project).includeCurrentCommandAsNavigation()
    }
}