planning

node_modules/micromark/lib/tokenize/html-flow.js

@@ -0,0 +1,513 @@
+'use strict'
+
+var assert = require('assert')
+var asciiAlpha = require('../character/ascii-alpha.js')
+var asciiAlphanumeric = require('../character/ascii-alphanumeric.js')
+var codes = require('../character/codes.js')
+var markdownLineEnding = require('../character/markdown-line-ending.js')
+var markdownLineEndingOrSpace = require('../character/markdown-line-ending-or-space.js')
+var markdownSpace = require('../character/markdown-space.js')
+var constants = require('../constant/constants.js')
+var fromCharCode = require('../constant/from-char-code.js')
+var htmlBlockNames = require('../constant/html-block-names.js')
+var htmlRawNames = require('../constant/html-raw-names.js')
+var types = require('../constant/types.js')
+var partialBlankLine = require('./partial-blank-line.js')
+
+function _interopDefaultLegacy(e) {
+  return e && typeof e === 'object' && 'default' in e ? e : {default: e}
+}
+
+var assert__default = /*#__PURE__*/ _interopDefaultLegacy(assert)
+
+var htmlFlow = {
+  name: 'htmlFlow',
+  tokenize: tokenizeHtmlFlow,
+  resolveTo: resolveToHtmlFlow,
+  concrete: true
+}
+
+var nextBlankConstruct = {tokenize: tokenizeNextBlank, partial: true}
+
+function resolveToHtmlFlow(events) {
+  var index = events.length
+
+  while (index--) {
+    if (
+      events[index][0] === 'enter' &&
+      events[index][1].type === types.htmlFlow
+    ) {
+      break
+    }
+  }
+
+  if (index > 1 && events[index - 2][1].type === types.linePrefix) {
+    // Add the prefix start to the HTML token.
+    events[index][1].start = events[index - 2][1].start
+    // Add the prefix start to the HTML line token.
+    events[index + 1][1].start = events[index - 2][1].start
+    // Remove the line prefix.
+    events.splice(index - 2, 2)
+  }
+
+  return events
+}
+
+function tokenizeHtmlFlow(effects, ok, nok) {
+  var self = this
+  var kind
+  var startTag
+  var buffer
+  var index
+  var marker
+
+  return start
+
+  function start(code) {
+    assert__default['default'](code === codes.lessThan, 'expected `<`')
+    effects.enter(types.htmlFlow)
+    effects.enter(types.htmlFlowData)
+    effects.consume(code)
+    return open
+  }
+
+  function open(code) {
+    if (code === codes.exclamationMark) {
+      effects.consume(code)
+      return declarationStart
+    }
+
+    if (code === codes.slash) {
+      effects.consume(code)
+      return tagCloseStart
+    }
+
+    if (code === codes.questionMark) {
+      effects.consume(code)
+      kind = constants.htmlInstruction
+      // While we’re in an instruction instead of a declaration, we’re on a `?`
+      // right now, so we do need to search for `>`, similar to declarations.
+      return self.interrupt ? ok : continuationDeclarationInside
+    }
+
+    if (asciiAlpha(code)) {
+      effects.consume(code)
+      buffer = fromCharCode(code)
+      startTag = true
+      return tagName
+    }
+
+    return nok(code)
+  }
+
+  function declarationStart(code) {
+    if (code === codes.dash) {
+      effects.consume(code)
+      kind = constants.htmlComment
+      return commentOpenInside
+    }
+
+    if (code === codes.leftSquareBracket) {
+      effects.consume(code)
+      kind = constants.htmlCdata
+      buffer = constants.cdataOpeningString
+      index = 0
+      return cdataOpenInside
+    }
+
+    if (asciiAlpha(code)) {
+      effects.consume(code)
+      kind = constants.htmlDeclaration
+      return self.interrupt ? ok : continuationDeclarationInside
+    }
+
+    return nok(code)
+  }
+
+  function commentOpenInside(code) {
+    if (code === codes.dash) {
+      effects.consume(code)
+      return self.interrupt ? ok : continuationDeclarationInside
+    }
+
+    return nok(code)
+  }
+
+  function cdataOpenInside(code) {
+    if (code === buffer.charCodeAt(index++)) {
+      effects.consume(code)
+      return index === buffer.length
+        ? self.interrupt
+          ? ok
+          : continuation
+        : cdataOpenInside
+    }
+
+    return nok(code)
+  }
+
+  function tagCloseStart(code) {
+    if (asciiAlpha(code)) {
+      effects.consume(code)
+      buffer = fromCharCode(code)
+      return tagName
+    }
+
+    return nok(code)
+  }
+
+  function tagName(code) {
+    if (
+      code === codes.eof ||
+      code === codes.slash ||
+      code === codes.greaterThan ||
+      markdownLineEndingOrSpace(code)
+    ) {
+      if (
+        code !== codes.slash &&
+        startTag &&
+        htmlRawNames.indexOf(buffer.toLowerCase()) > -1
+      ) {
+        kind = constants.htmlRaw
+        return self.interrupt ? ok(code) : continuation(code)
+      }
+
+      if (htmlBlockNames.indexOf(buffer.toLowerCase()) > -1) {
+        kind = constants.htmlBasic
+
+        if (code === codes.slash) {
+          effects.consume(code)
+          return basicSelfClosing
+        }
+
+        return self.interrupt ? ok(code) : continuation(code)
+      }
+
+      kind = constants.htmlComplete
+      // Do not support complete HTML when interrupting.
+      return self.interrupt
+        ? nok(code)
+        : startTag
+        ? completeAttributeNameBefore(code)
+        : completeClosingTagAfter(code)
+    }
+
+    if (code === codes.dash || asciiAlphanumeric(code)) {
+      effects.consume(code)
+      buffer += fromCharCode(code)
+      return tagName
+    }
+
+    return nok(code)
+  }
+
+  function basicSelfClosing(code) {
+    if (code === codes.greaterThan) {
+      effects.consume(code)
+      return self.interrupt ? ok : continuation
+    }
+
+    return nok(code)
+  }
+
+  function completeClosingTagAfter(code) {
+    if (markdownSpace(code)) {
+      effects.consume(code)
+      return completeClosingTagAfter
+    }
+
+    return completeEnd(code)
+  }
+
+  function completeAttributeNameBefore(code) {
+    if (code === codes.slash) {
+      effects.consume(code)
+      return completeEnd
+    }
+
+    if (code === codes.colon || code === codes.underscore || asciiAlpha(code)) {
+      effects.consume(code)
+      return completeAttributeName
+    }
+
+    if (markdownSpace(code)) {
+      effects.consume(code)
+      return completeAttributeNameBefore
+    }
+
+    return completeEnd(code)
+  }
+
+  function completeAttributeName(code) {
+    if (
+      code === codes.dash ||
+      code === codes.dot ||
+      code === codes.colon ||
+      code === codes.underscore ||
+      asciiAlphanumeric(code)
+    ) {
+      effects.consume(code)
+      return completeAttributeName
+    }
+
+    return completeAttributeNameAfter(code)
+  }
+
+  function completeAttributeNameAfter(code) {
+    if (code === codes.equalsTo) {
+      effects.consume(code)
+      return completeAttributeValueBefore
+    }
+
+    if (markdownSpace(code)) {
+      effects.consume(code)
+      return completeAttributeNameAfter
+    }
+
+    return completeAttributeNameBefore(code)
+  }
+
+  function completeAttributeValueBefore(code) {
+    if (
+      code === codes.eof ||
+      code === codes.lessThan ||
+      code === codes.equalsTo ||
+      code === codes.greaterThan ||
+      code === codes.graveAccent
+    ) {
+      return nok(code)
+    }
+
+    if (code === codes.quotationMark || code === codes.apostrophe) {
+      effects.consume(code)
+      marker = code
+      return completeAttributeValueQuoted
+    }
+
+    if (markdownSpace(code)) {
+      effects.consume(code)
+      return completeAttributeValueBefore
+    }
+
+    marker = undefined
+    return completeAttributeValueUnquoted(code)
+  }
+
+  function completeAttributeValueQuoted(code) {
+    if (code === marker) {
+      effects.consume(code)
+      return completeAttributeValueQuotedAfter
+    }
+
+    if (code === codes.eof || markdownLineEnding(code)) {
+      return nok(code)
+    }
+
+    effects.consume(code)
+    return completeAttributeValueQuoted
+  }
+
+  function completeAttributeValueUnquoted(code) {
+    if (
+      code === codes.eof ||
+      code === codes.quotationMark ||
+      code === codes.apostrophe ||
+      code === codes.lessThan ||
+      code === codes.equalsTo ||
+      code === codes.greaterThan ||
+      code === codes.graveAccent ||
+      markdownLineEndingOrSpace(code)
+    ) {
+      return completeAttributeNameAfter(code)
+    }
+
+    effects.consume(code)
+    return completeAttributeValueUnquoted
+  }
+
+  function completeAttributeValueQuotedAfter(code) {
+    if (
+      code === codes.slash ||
+      code === codes.greaterThan ||
+      markdownSpace(code)
+    ) {
+      return completeAttributeNameBefore(code)
+    }
+
+    return nok(code)
+  }
+
+  function completeEnd(code) {
+    if (code === codes.greaterThan) {
+      effects.consume(code)
+      return completeAfter
+    }
+
+    return nok(code)
+  }
+
+  function completeAfter(code) {
+    if (markdownSpace(code)) {
+      effects.consume(code)
+      return completeAfter
+    }
+
+    return code === codes.eof || markdownLineEnding(code)
+      ? continuation(code)
+      : nok(code)
+  }
+
+  function continuation(code) {
+    if (code === codes.dash && kind === constants.htmlComment) {
+      effects.consume(code)
+      return continuationCommentInside
+    }
+
+    if (code === codes.lessThan && kind === constants.htmlRaw) {
+      effects.consume(code)
+      return continuationRawTagOpen
+    }
+
+    if (code === codes.greaterThan && kind === constants.htmlDeclaration) {
+      effects.consume(code)
+      return continuationClose
+    }
+
+    if (code === codes.questionMark && kind === constants.htmlInstruction) {
+      effects.consume(code)
+      return continuationDeclarationInside
+    }
+
+    if (code === codes.rightSquareBracket && kind === constants.htmlCdata) {
+      effects.consume(code)
+      return continuationCharacterDataInside
+    }
+
+    if (
+      markdownLineEnding(code) &&
+      (kind === constants.htmlBasic || kind === constants.htmlComplete)
+    ) {
+      return effects.check(
+        nextBlankConstruct,
+        continuationClose,
+        continuationAtLineEnding
+      )(code)
+    }
+
+    if (code === codes.eof || markdownLineEnding(code)) {
+      return continuationAtLineEnding(code)
+    }
+
+    effects.consume(code)
+    return continuation
+  }
+
+  function continuationAtLineEnding(code) {
+    effects.exit(types.htmlFlowData)
+    return htmlContinueStart(code)
+  }
+
+  function htmlContinueStart(code) {
+    if (code === codes.eof) {
+      return done(code)
+    }
+
+    if (markdownLineEnding(code)) {
+      effects.enter(types.lineEnding)
+      effects.consume(code)
+      effects.exit(types.lineEnding)
+      return htmlContinueStart
+    }
+
+    effects.enter(types.htmlFlowData)
+    return continuation(code)
+  }
+
+  function continuationCommentInside(code) {
+    if (code === codes.dash) {
+      effects.consume(code)
+      return continuationDeclarationInside
+    }
+
+    return continuation(code)
+  }
+
+  function continuationRawTagOpen(code) {
+    if (code === codes.slash) {
+      effects.consume(code)
+      buffer = ''
+      return continuationRawEndTag
+    }
+
+    return continuation(code)
+  }
+
+  function continuationRawEndTag(code) {
+    if (
+      code === codes.greaterThan &&
+      htmlRawNames.indexOf(buffer.toLowerCase()) > -1
+    ) {
+      effects.consume(code)
+      return continuationClose
+    }
+
+    if (asciiAlpha(code) && buffer.length < constants.htmlRawSizeMax) {
+      effects.consume(code)
+      buffer += fromCharCode(code)
+      return continuationRawEndTag
+    }
+
+    return continuation(code)
+  }
+
+  function continuationCharacterDataInside(code) {
+    if (code === codes.rightSquareBracket) {
+      effects.consume(code)
+      return continuationDeclarationInside
+    }
+
+    return continuation(code)
+  }
+
+  function continuationDeclarationInside(code) {
+    if (code === codes.greaterThan) {
+      effects.consume(code)
+      return continuationClose
+    }
+
+    return continuation(code)
+  }
+
+  function continuationClose(code) {
+    if (code === codes.eof || markdownLineEnding(code)) {
+      effects.exit(types.htmlFlowData)
+      return done(code)
+    }
+
+    effects.consume(code)
+    return continuationClose
+  }
+
+  function done(code) {
+    effects.exit(types.htmlFlow)
+    return ok(code)
+  }
+}
+
+function tokenizeNextBlank(effects, ok, nok) {
+  return start
+
+  function start(code) {
+    assert__default['default'](
+      markdownLineEnding(code),
+      'expected a line ending'
+    )
+    effects.exit(types.htmlFlowData)
+    effects.enter(types.lineEndingBlank)
+    effects.consume(code)
+    effects.exit(types.lineEndingBlank)
+    return effects.attempt(partialBlankLine, ok, nok)
+  }
+}
+
+module.exports = htmlFlow