package org.intellij.markdown.parser.markerblocks

import org.intellij.markdown.parser.LookaheadText
import org.intellij.markdown.parser.MarkerProcessor
import org.intellij.markdown.parser.ProductionHolder
import org.intellij.markdown.parser.constraints.MarkdownConstraints
import org.intellij.markdown.parser.constraints.getCharsEaten

interface MarkerBlockProvider<T : MarkerProcessor.StateInfo> {
    fun createMarkerBlocks(pos: LookaheadText.Position,
                           productionHolder: ProductionHolder,
                           stateInfo: T): List<MarkerBlock>

    fun interruptsParagraph(pos: LookaheadText.Position, constraints: MarkdownConstraints): Boolean

    companion object {
        fun isStartOfLineWithConstraints(pos: LookaheadText.Position, constraints: MarkdownConstraints): Boolean {
            return pos.offsetInCurrentLine == constraints.getCharsEaten(pos.currentLine)
        }
        
        fun passSmallIndent(text: CharSequence, startOffset: Int = 0): Int {
            var offset = startOffset
            repeat(3) {
                if (offset < text.length && text[offset] == ' ') {
                    offset++
                }
            }
            return offset
        }
    }
}