banboshi_V2/HalftoneWeb/node_modules/hyntax-yx/lib/tokenizer-context-handlers/data.js

const { calculateTokenCharactersRange } = require('../helpers')

const {
  TOKEN_TEXT,
  TOKEN_COMMENT_START
} = require('../constants/token-types')
const {
  OPEN_TAG_START_CONTEXT,
  CLOSE_TAG_CONTEXT,
  DOCTYPE_START_CONTEXT,
  COMMENT_CONTENT_CONTEXT
} = require('../constants/tokenizer-contexts')

const COMMENT_START = '<!--'

function generateTextToken (state) {
  const range = calculateTokenCharactersRange(state, { keepBuffer: false })

  return {
    type: TOKEN_TEXT,
    content: state.accumulatedContent,
    startPosition: range.startPosition,
    endPosition: range.endPosition
  }
}

function openingCornerBraceWithText (state, tokens) {
  if (state.accumulatedContent.length !== 0) {
    tokens.push(generateTextToken(state))
  }

  state.accumulatedContent = state.decisionBuffer
  state.decisionBuffer = ''
  state.currentContext = OPEN_TAG_START_CONTEXT
  state.caretPosition++
}

function openingCornerBraceWithSlash (state, tokens) {
  if (state.accumulatedContent.length !== 0) {
    tokens.push(generateTextToken(state))
  }

  state.accumulatedContent = state.decisionBuffer
  state.decisionBuffer = ''
  state.currentContext = CLOSE_TAG_CONTEXT
  state.caretPosition++
}

function doctypeStart (state, tokens) {
  if (state.accumulatedContent.length !== 0) {
    tokens.push(generateTextToken(state))
  }

  state.accumulatedContent = state.decisionBuffer
  state.decisionBuffer = ''
  state.currentContext = DOCTYPE_START_CONTEXT
  state.caretPosition++
}

function commentStart (state, tokens) {
  if (state.accumulatedContent.length !== 0) {
    tokens.push(generateTextToken(state))
  }

  const commentStartRange = {
    startPosition: state.caretPosition - (COMMENT_START.length - 1),
    endPosition: state.caretPosition
  }

  tokens.push({
    type: TOKEN_COMMENT_START,
    content: state.decisionBuffer,
    startPosition: commentStartRange.startPosition,
    endPosition: commentStartRange.endPosition
  })

  state.accumulatedContent = ''
  state.decisionBuffer = ''
  state.currentContext = COMMENT_CONTENT_CONTEXT
  state.caretPosition++
}

function handleContentEnd (state, tokens) {
  const textContent = state.accumulatedContent + state.decisionBuffer

  if (textContent.length !== 0) {
    const range = calculateTokenCharactersRange(state, { keepBuffer: false })

    tokens.push({
      type: TOKEN_TEXT,
      content: textContent,
      startPosition: range.startPosition,
      endPosition: range.endPosition
    })
  }
}

function isIncompleteDoctype (chars) {
  const charsUpperCase = chars.toUpperCase()

  return (
    charsUpperCase === '<!'
    || charsUpperCase === '<!D'
    || charsUpperCase === '<!DO'
    || charsUpperCase === '<!DOC'
    || charsUpperCase === '<!DOCT'
    || charsUpperCase === '<!DOCTY'
    || charsUpperCase === '<!DOCTYP'
  )
}

const OPEN_TAG_START_PATTERN = /^<\w/

function parseSyntax (chars, state, tokens, nextChar, nextNoWhiteChar, fullChars, charIndex) {
  if (OPEN_TAG_START_PATTERN.test(chars)) {
    return openingCornerBraceWithText(state, tokens)
  }

  if (chars === '</') {
    return openingCornerBraceWithSlash(state, tokens)
  }

  // 这种方法不行，会误伤属性里的<，如<dd class="1<5">1<5</dd> <view>我是打酱油</view>
  // if (chars === '<') {
  //   const restChars = fullChars ? fullChars.slice(charIndex + 1) : ''
  //   if (nextChar !== '!' && restChars.indexOf('>') == -1) {
  //     // 1 < 5 后面没有其他的 > ，则 当前 < 不是标签
  //   } else if (nextChar !== '!' && restChars.indexOf('<') > -1 && restChars.indexOf('<') < restChars.indexOf('>')) {
  //     // <div> a < 1 </div> 如果 < 后面先出现 < 后出现 > 就代表当前的 < 不是标签
  //   } else {
  //     state.caretPosition++

  //     return
  //   }
  // }

  if (chars === '<') {
    // <a>{{i<b}}</a> 判断前后片段，如果被{{}}包裹，就不认为是标签
    const preChars = fullChars ? fullChars.slice(0, charIndex - 1) : ''
    const restChars = fullChars ? fullChars.slice(charIndex + 1) : ''
    const restStartIndex = restChars.indexOf('{{')
    const restEndIndex = restChars.indexOf('}}')

    if (preChars.lastIndexOf('{{') > preChars.lastIndexOf('}}')
      && restEndIndex > -1
      && restStartIndex == -1 || restEndIndex < restStartIndex) {
      // not open tag
    } else {
      if (nextNoWhiteChar.match(/[a-z]|[A-Z]|\/|\!|\-/)) {
        state.caretPosition++
        return
      }
    }
  }

  if (chars === '<!' || chars === '<!-') {
    state.caretPosition++
    return
  }

  if (chars === COMMENT_START) {
    return commentStart(state, tokens)
  }

  if (isIncompleteDoctype(chars)) {
    state.caretPosition++

    return
  }

  if (chars.toUpperCase() === '<!DOCTYPE') {
    return doctypeStart(state, tokens)
  }

  state.accumulatedContent += state.decisionBuffer
  state.decisionBuffer = ''
  state.caretPosition++
}

module.exports = {
  parseSyntax,
  handleContentEnd
}