planning

node_modules/remark-parse/lib/tokenize/html-block.js

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+'use strict'
+
+var openCloseTag = require('../util/html').openCloseTag
+
+module.exports = blockHtml
+
+var tab = '\t'
+var space = ' '
+var lineFeed = '\n'
+var lessThan = '<'
+
+var rawOpenExpression = /^<(script|pre|style)(?=(\s|>|$))/i
+var rawCloseExpression = /<\/(script|pre|style)>/i
+var commentOpenExpression = /^<!--/
+var commentCloseExpression = /-->/
+var instructionOpenExpression = /^<\?/
+var instructionCloseExpression = /\?>/
+var directiveOpenExpression = /^<![A-Za-z]/
+var directiveCloseExpression = />/
+var cdataOpenExpression = /^<!\[CDATA\[/
+var cdataCloseExpression = /\]\]>/
+var elementCloseExpression = /^$/
+var otherElementOpenExpression = new RegExp(openCloseTag.source + '\\s*$')
+
+function blockHtml(eat, value, silent) {
+  var self = this
+  var blocks = self.options.blocks.join('|')
+  var elementOpenExpression = new RegExp(
+    '^</?(' + blocks + ')(?=(\\s|/?>|$))',
+    'i'
+  )
+  var length = value.length
+  var index = 0
+  var next
+  var line
+  var offset
+  var character
+  var count
+  var sequence
+  var subvalue
+
+  var sequences = [
+    [rawOpenExpression, rawCloseExpression, true],
+    [commentOpenExpression, commentCloseExpression, true],
+    [instructionOpenExpression, instructionCloseExpression, true],
+    [directiveOpenExpression, directiveCloseExpression, true],
+    [cdataOpenExpression, cdataCloseExpression, true],
+    [elementOpenExpression, elementCloseExpression, true],
+    [otherElementOpenExpression, elementCloseExpression, false]
+  ]
+
+  // Eat initial spacing.
+  while (index < length) {
+    character = value.charAt(index)
+
+    if (character !== tab && character !== space) {
+      break
+    }
+
+    index++
+  }
+
+  if (value.charAt(index) !== lessThan) {
+    return
+  }
+
+  next = value.indexOf(lineFeed, index + 1)
+  next = next === -1 ? length : next
+  line = value.slice(index, next)
+  offset = -1
+  count = sequences.length
+
+  while (++offset < count) {
+    if (sequences[offset][0].test(line)) {
+      sequence = sequences[offset]
+      break
+    }
+  }
+
+  if (!sequence) {
+    return
+  }
+
+  if (silent) {
+    return sequence[2]
+  }
+
+  index = next
+
+  if (!sequence[1].test(line)) {
+    while (index < length) {
+      next = value.indexOf(lineFeed, index + 1)
+      next = next === -1 ? length : next
+      line = value.slice(index + 1, next)
+
+      if (sequence[1].test(line)) {
+        if (line) {
+          index = next
+        }
+
+        break
+      }
+
+      index = next
+    }
+  }
+
+  subvalue = value.slice(0, index)
+
+  return eat(subvalue)({type: 'html', value: subvalue})
+}