pimd/lib/rules-inline/processing-instruction.js

Processing instructions for Markdown

const PI_REG_EXP = /^<\?(.+?)\?>/

module.exports = function processingInstruction(
  state,
  startLine,
  endLine,
  silent
) {
  let pos = state.pos

  if (
    state.src.charCodeAt(pos) !== 0x3c /* < */ ||
    state.src.charCodeAt(pos + 1) !== 0x3f /* ? */
  ) {
    return false
  }

  const match = state.src.slice(pos).match(PI_REG_EXP)
  if (!match) {
    return false
  }

  if (!silent) {
    const token = state.push("processing_instruction_inline", "", 0)

    const inner = match[1]
    const separatorPos = inner.indexOf(" ")
    if (separatorPos === -1) {
      token.name = inner
      token.content = null
    } else {
      token.name = inner.substring(0, separatorPos)
      token.content = inner.substring(separatorPos + 1).trim()
    }
  }

  state.pos += match[0].length
  return true
}