pro-docs/libs/codemirror/mode/markdown/markdown.js

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

;(function (mod) {
    if (typeof exports == 'object' && typeof module == 'object')
        // CommonJS
        mod(require('../../lib/codemirror'), require('../xml/xml'), require('../meta'))
    else if (typeof define == 'function' && define.amd)
        // AMD
        define(['../../lib/codemirror', '../xml/xml', '../meta'], mod)
    // Plain browser env
    else mod(CodeMirror)
})(function (CodeMirror) {
    'use strict'

    CodeMirror.defineMode(
        'markdown',
        function (cmCfg, modeCfg) {
            var htmlMode = CodeMirror.getMode(cmCfg, 'text/html')
            var htmlModeMissing = htmlMode.name == 'null'

            function getMode(name) {
                if (CodeMirror.findModeByName) {
                    var found = CodeMirror.findModeByName(name)
                    if (found) name = found.mime || found.mimes[0]
                }
                var mode = CodeMirror.getMode(cmCfg, name)
                return mode.name == 'null' ? null : mode
            }

            // Should characters that affect highlighting be highlighted separate?
            // Does not include characters that will be output (such as `1.` and `-` for lists)
            if (modeCfg.highlightFormatting === undefined) modeCfg.highlightFormatting = false

            // Maximum number of nested blockquotes. Set to 0 for infinite nesting.
            // Excess `>` will emit `error` token.
            if (modeCfg.maxBlockquoteDepth === undefined) modeCfg.maxBlockquoteDepth = 0

            // Turn on task lists? ("- [ ] " and "- [x] ")
            if (modeCfg.taskLists === undefined) modeCfg.taskLists = false

            // Turn on strikethrough syntax
            if (modeCfg.strikethrough === undefined) modeCfg.strikethrough = false

            if (modeCfg.emoji === undefined) modeCfg.emoji = false

            if (modeCfg.fencedCodeBlockHighlighting === undefined) modeCfg.fencedCodeBlockHighlighting = true

            if (modeCfg.fencedCodeBlockDefaultMode === undefined) modeCfg.fencedCodeBlockDefaultMode = 'text/plain'

            if (modeCfg.xml === undefined) modeCfg.xml = true

            // Allow token types to be overridden by user-provided token types.
            if (modeCfg.tokenTypeOverrides === undefined) modeCfg.tokenTypeOverrides = {}

            var tokenTypes = {
                header: 'header',
                code: 'comment',
                quote: 'quote',
                list1: 'variable-2',
                list2: 'variable-3',
                list3: 'keyword',
                hr: 'hr',
                image: 'image',
                imageAltText: 'image-alt-text',
                imageMarker: 'image-marker',
                formatting: 'formatting',
                linkInline: 'link',
                linkEmail: 'link',
                linkText: 'link',
                linkHref: 'string',
                em: 'em',
                strong: 'strong',
                strikethrough: 'strikethrough',
                emoji: 'builtin',
            }

            for (var tokenType in tokenTypes) {
                if (tokenTypes.hasOwnProperty(tokenType) && modeCfg.tokenTypeOverrides[tokenType]) {
                    tokenTypes[tokenType] = modeCfg.tokenTypeOverrides[tokenType]
                }
            }

            var hrRE = /^([*\-_])(?:\s*\1){2,}\s*$/,
                listRE = /^(?:[*\-+]|^[0-9]+([.)]))\s+/,
                taskListRE = /^\[(x| )\](?=\s)/i, // Must follow listRE
                atxHeaderRE = modeCfg.allowAtxHeaderWithoutSpace ? /^(#+)/ : /^(#+)(?: |$)/,
                setextHeaderRE = /^ {0,3}(?:\={1,}|-{2,})\s*$/,
                textRE = /^[^#!\[\]*_\\<>` "'(~:]+/,
                fencedCodeRE = /^(~~~+|```+)[ \t]*([\w\/+#-]*)[^\n`]*$/,
                linkDefRE = /^\s*\[[^\]]+?\]:.*$/, // naive link-definition
                punctuation =
                    /[!"#$%&'()*+,\-.\/:;<=>?@\[\\\]^_`{|}~\xA1\xA7\xAB\xB6\xB7\xBB\xBF\u037E\u0387\u055A-\u055F\u0589\u058A\u05BE\u05C0\u05C3\u05C6\u05F3\u05F4\u0609\u060A\u060C\u060D\u061B\u061E\u061F\u066A-\u066D\u06D4\u0700-\u070D\u07F7-\u07F9\u0830-\u083E\u085E\u0964\u0965\u0970\u0AF0\u0DF4\u0E4F\u0E5A\u0E5B\u0F04-\u0F12\u0F14\u0F3A-\u0F3D\u0F85\u0FD0-\u0FD4\u0FD9\u0FDA\u104A-\u104F\u10FB\u1360-\u1368\u1400\u166D\u166E\u169B\u169C\u16EB-\u16ED\u1735\u1736\u17D4-\u17D6\u17D8-\u17DA\u1800-\u180A\u1944\u1945\u1A1E\u1A1F\u1AA0-\u1AA6\u1AA8-\u1AAD\u1B5A-\u1B60\u1BFC-\u1BFF\u1C3B-\u1C3F\u1C7E\u1C7F\u1CC0-\u1CC7\u1CD3\u2010-\u2027\u2030-\u2043\u2045-\u2051\u2053-\u205E\u207D\u207E\u208D\u208E\u2308-\u230B\u2329\u232A\u2768-\u2775\u27C5\u27C6\u27E6-\u27EF\u2983-\u2998\u29D8-\u29DB\u29FC\u29FD\u2CF9-\u2CFC\u2CFE\u2CFF\u2D70\u2E00-\u2E2E\u2E30-\u2E42\u3001-\u3003\u3008-\u3011\u3014-\u301F\u3030\u303D\u30A0\u30FB\uA4FE\uA4FF\uA60D-\uA60F\uA673\uA67E\uA6F2-\uA6F7\uA874-\uA877\uA8CE\uA8CF\uA8F8-\uA8FA\uA8FC\uA92E\uA92F\uA95F\uA9C1-\uA9CD\uA9DE\uA9DF\uAA5C-\uAA5F\uAADE\uAADF\uAAF0\uAAF1\uABEB\uFD3E\uFD3F\uFE10-\uFE19\uFE30-\uFE52\uFE54-\uFE61\uFE63\uFE68\uFE6A\uFE6B\uFF01-\uFF03\uFF05-\uFF0A\uFF0C-\uFF0F\uFF1A\uFF1B\uFF1F\uFF20\uFF3B-\uFF3D\uFF3F\uFF5B\uFF5D\uFF5F-\uFF65]|\uD800[\uDD00-\uDD02\uDF9F\uDFD0]|\uD801\uDD6F|\uD802[\uDC57\uDD1F\uDD3F\uDE50-\uDE58\uDE7F\uDEF0-\uDEF6\uDF39-\uDF3F\uDF99-\uDF9C]|\uD804[\uDC47-\uDC4D\uDCBB\uDCBC\uDCBE-\uDCC1\uDD40-\uDD43\uDD74\uDD75\uDDC5-\uDDC9\uDDCD\uDDDB\uDDDD-\uDDDF\uDE38-\uDE3D\uDEA9]|\uD805[\uDCC6\uDDC1-\uDDD7\uDE41-\uDE43\uDF3C-\uDF3E]|\uD809[\uDC70-\uDC74]|\uD81A[\uDE6E\uDE6F\uDEF5\uDF37-\uDF3B\uDF44]|\uD82F\uDC9F|\uD836[\uDE87-\uDE8B]/,
                expandedTab = '    ' // CommonMark specifies tab as 4 spaces

            function switchInline(stream, state, f) {
                state.f = state.inline = f
                return f(stream, state)
            }

            function switchBlock(stream, state, f) {
                state.f = state.block = f
                return f(stream, state)
            }

            function lineIsEmpty(line) {
                return !line || !/\S/.test(line.string)
            }

            // Blocks

            function blankLine(state) {
                // Reset linkTitle state
                state.linkTitle = false
                state.linkHref = false
                state.linkText = false
                // Reset EM state
                state.em = false
                // Reset STRONG state
                state.strong = false
                // Reset strikethrough state
                state.strikethrough = false
                // Reset state.quote
                state.quote = 0
                // Reset state.indentedCode
                state.indentedCode = false
                if (state.f == htmlBlock) {
                    var exit = htmlModeMissing
                    if (!exit) {
                        var inner = CodeMirror.innerMode(htmlMode, state.htmlState)
                        exit = inner.mode.name == 'xml' && inner.state.tagStart === null && !inner.state.context && inner.state.tokenize.isInText
                    }
                    if (exit) {
                        state.f = inlineNormal
                        state.block = blockNormal
                        state.htmlState = null
                    }
                }
                // Reset state.trailingSpace
                state.trailingSpace = 0
                state.trailingSpaceNewLine = false
                // Mark this line as blank
                state.prevLine = state.thisLine
                state.thisLine = { stream: null }
                return null
            }

            function blockNormal(stream, state) {
                var firstTokenOnLine = stream.column() === state.indentation
                var prevLineLineIsEmpty = lineIsEmpty(state.prevLine.stream)
                var prevLineIsIndentedCode = state.indentedCode
                var prevLineIsHr = state.prevLine.hr
                var prevLineIsList = state.list !== false
                var maxNonCodeIndentation = (state.listStack[state.listStack.length - 1] || 0) + 3

                state.indentedCode = false

                var lineIndentation = state.indentation
                // compute once per line (on first token)
                if (state.indentationDiff === null) {
                    state.indentationDiff = state.indentation
                    if (prevLineIsList) {
                        state.list = null
                        // While this list item's marker's indentation is less than the deepest
                        //  list item's content's indentation,pop the deepest list item
                        //  indentation off the stack, and update block indentation state
                        while (lineIndentation < state.listStack[state.listStack.length - 1]) {
                            state.listStack.pop()
                            if (state.listStack.length) {
                                state.indentation = state.listStack[state.listStack.length - 1]
                                // less than the first list's indent -> the line is no longer a list
                            } else {
                                state.list = false
                            }
                        }
                        if (state.list !== false) {
                            state.indentationDiff = lineIndentation - state.listStack[state.listStack.length - 1]
                        }
                    }
                }

                // not comprehensive (currently only for setext detection purposes)
                var allowsInlineContinuation = !prevLineLineIsEmpty && !prevLineIsHr && !state.prevLine.header && (!prevLineIsList || !prevLineIsIndentedCode) && !state.prevLine.fencedCodeEnd

                var isHr = (state.list === false || prevLineIsHr || prevLineLineIsEmpty) && state.indentation <= maxNonCodeIndentation && stream.match(hrRE)

                var match = null
                if (state.indentationDiff >= 4 && (prevLineIsIndentedCode || state.prevLine.fencedCodeEnd || state.prevLine.header || prevLineLineIsEmpty)) {
                    stream.skipToEnd()
                    state.indentedCode = true
                    return tokenTypes.code
                } else if (stream.eatSpace()) {
                    return null
                } else if (firstTokenOnLine && state.indentation <= maxNonCodeIndentation && (match = stream.match(atxHeaderRE)) && match[1].length <= 6) {
                    state.quote = 0
                    state.header = match[1].length
                    state.thisLine.header = true
                    if (modeCfg.highlightFormatting) state.formatting = 'header'
                    state.f = state.inline
                    return getType(state)
                } else if (state.indentation <= maxNonCodeIndentation && stream.eat('>')) {
                    state.quote = firstTokenOnLine ? 1 : state.quote + 1
                    if (modeCfg.highlightFormatting) state.formatting = 'quote'
                    stream.eatSpace()
                    return getType(state)
                } else if (!isHr && !state.setext && firstTokenOnLine && state.indentation <= maxNonCodeIndentation && (match = stream.match(listRE))) {
                    var listType = match[1] ? 'ol' : 'ul'

                    state.indentation = lineIndentation + stream.current().length
                    state.list = true
                    state.quote = 0

                    // Add this list item's content's indentation to the stack
                    state.listStack.push(state.indentation)
                    // Reset inline styles which shouldn't propagate across list items
                    state.em = false
                    state.strong = false
                    state.code = false
                    state.strikethrough = false

                    if (modeCfg.taskLists && stream.match(taskListRE, false)) {
                        state.taskList = true
                    }
                    state.f = state.inline
                    if (modeCfg.highlightFormatting) state.formatting = ['list', 'list-' + listType]
                    return getType(state)
                } else if (firstTokenOnLine && state.indentation <= maxNonCodeIndentation && (match = stream.match(fencedCodeRE, true))) {
                    state.quote = 0
                    state.fencedEndRE = new RegExp(match[1] + '+ *$')
                    // try switching mode
                    state.localMode = modeCfg.fencedCodeBlockHighlighting && getMode(match[2] || modeCfg.fencedCodeBlockDefaultMode)
                    if (state.localMode) state.localState = CodeMirror.startState(state.localMode)
                    state.f = state.block = local
                    if (modeCfg.highlightFormatting) state.formatting = 'code-block'
                    state.code = -1
                    return getType(state)
                    // SETEXT has lowest block-scope precedence after HR, so check it after
                    //  the others (code, blockquote, list...)
                } else if (
                    // if setext set, indicates line after ---/===
                    state.setext ||
                    // line before ---/===
                    ((!allowsInlineContinuation || !prevLineIsList) &&
                        !state.quote &&
                        state.list === false &&
                        !state.code &&
                        !isHr &&
                        !linkDefRE.test(stream.string) &&
                        (match = stream.lookAhead(1)) &&
                        (match = match.match(setextHeaderRE)))
                ) {
                    if (!state.setext) {
                        state.header = match[0].charAt(0) == '=' ? 1 : 2
                        state.setext = state.header
                    } else {
                        state.header = state.setext
                        // has no effect on type so we can reset it now
                        state.setext = 0
                        stream.skipToEnd()
                        if (modeCfg.highlightFormatting) state.formatting = 'header'
                    }
                    state.thisLine.header = true
                    state.f = state.inline
                    return getType(state)
                } else if (isHr) {
                    stream.skipToEnd()
                    state.hr = true
                    state.thisLine.hr = true
                    return tokenTypes.hr
                } else if (stream.peek() === '[') {
                    return switchInline(stream, state, footnoteLink)
                }

                return switchInline(stream, state, state.inline)
            }

            function htmlBlock(stream, state) {
                var style = htmlMode.token(stream, state.htmlState)
                if (!htmlModeMissing) {
                    var inner = CodeMirror.innerMode(htmlMode, state.htmlState)
                    if (
                        (inner.mode.name == 'xml' && inner.state.tagStart === null && !inner.state.context && inner.state.tokenize.isInText) ||
                        (state.md_inside && stream.current().indexOf('>') > -1)
                    ) {
                        state.f = inlineNormal
                        state.block = blockNormal
                        state.htmlState = null
                    }
                }
                return style
            }

            function local(stream, state) {
                var currListInd = state.listStack[state.listStack.length - 1] || 0
                var hasExitedList = state.indentation < currListInd
                var maxFencedEndInd = currListInd + 3
                if (state.fencedEndRE && state.indentation <= maxFencedEndInd && (hasExitedList || stream.match(state.fencedEndRE))) {
                    if (modeCfg.highlightFormatting) state.formatting = 'code-block'
                    var returnType
                    if (!hasExitedList) returnType = getType(state)
                    state.localMode = state.localState = null
                    state.block = blockNormal
                    state.f = inlineNormal
                    state.fencedEndRE = null
                    state.code = 0
                    state.thisLine.fencedCodeEnd = true
                    if (hasExitedList) return switchBlock(stream, state, state.block)
                    return returnType
                } else if (state.localMode) {
                    return state.localMode.token(stream, state.localState)
                } else {
                    stream.skipToEnd()
                    return tokenTypes.code
                }
            }

            // Inline
            function getType(state) {
                var styles = []

                if (state.formatting) {
                    styles.push(tokenTypes.formatting)

                    if (typeof state.formatting === 'string') state.formatting = [state.formatting]

                    for (var i = 0; i < state.formatting.length; i++) {
                        styles.push(tokenTypes.formatting + '-' + state.formatting[i])

                        if (state.formatting[i] === 'header') {
                            styles.push(tokenTypes.formatting + '-' + state.formatting[i] + '-' + state.header)
                        }

                        // Add `formatting-quote` and `formatting-quote-#` for blockquotes
                        // Add `error` instead if the maximum blockquote nesting depth is passed
                        if (state.formatting[i] === 'quote') {
                            if (!modeCfg.maxBlockquoteDepth || modeCfg.maxBlockquoteDepth >= state.quote) {
                                styles.push(tokenTypes.formatting + '-' + state.formatting[i] + '-' + state.quote)
                            } else {
                                styles.push('error')
                            }
                        }
                    }
                }

                if (state.taskOpen) {
                    styles.push('meta')
                    return styles.length ? styles.join(' ') : null
                }
                if (state.taskClosed) {
                    styles.push('property')
                    return styles.length ? styles.join(' ') : null
                }

                if (state.linkHref) {
                    styles.push(tokenTypes.linkHref, 'url')
                } else {
                    // Only apply inline styles to non-url text
                    if (state.strong) {
                        styles.push(tokenTypes.strong)
                    }
                    if (state.em) {
                        styles.push(tokenTypes.em)
                    }
                    if (state.strikethrough) {
                        styles.push(tokenTypes.strikethrough)
                    }
                    if (state.emoji) {
                        styles.push(tokenTypes.emoji)
                    }
                    if (state.linkText) {
                        styles.push(tokenTypes.linkText)
                    }
                    if (state.code) {
                        styles.push(tokenTypes.code)
                    }
                    if (state.image) {
                        styles.push(tokenTypes.image)
                    }
                    if (state.imageAltText) {
                        styles.push(tokenTypes.imageAltText, 'link')
                    }
                    if (state.imageMarker) {
                        styles.push(tokenTypes.imageMarker)
                    }
                }

                if (state.header) {
                    styles.push(tokenTypes.header, tokenTypes.header + '-' + state.header)
                }

                if (state.quote) {
                    styles.push(tokenTypes.quote)

                    // Add `quote-#` where the maximum for `#` is modeCfg.maxBlockquoteDepth
                    if (!modeCfg.maxBlockquoteDepth || modeCfg.maxBlockquoteDepth >= state.quote) {
                        styles.push(tokenTypes.quote + '-' + state.quote)
                    } else {
                        styles.push(tokenTypes.quote + '-' + modeCfg.maxBlockquoteDepth)
                    }
                }

                if (state.list !== false) {
                    var listMod = (state.listStack.length - 1) % 3
                    if (!listMod) {
                        styles.push(tokenTypes.list1)
                    } else if (listMod === 1) {
                        styles.push(tokenTypes.list2)
                    } else {
                        styles.push(tokenTypes.list3)
                    }
                }

                if (state.trailingSpaceNewLine) {
                    styles.push('trailing-space-new-line')
                } else if (state.trailingSpace) {
                    styles.push('trailing-space-' + (state.trailingSpace % 2 ? 'a' : 'b'))
                }

                return styles.length ? styles.join(' ') : null
            }

            function handleText(stream, state) {
                if (stream.match(textRE, true)) {
                    return getType(state)
                }
                return undefined
            }

            function inlineNormal(stream, state) {
                var style = state.text(stream, state)
                if (typeof style !== 'undefined') return style

                if (state.list) {
                    // List marker (*, +, -, 1., etc)
                    state.list = null
                    return getType(state)
                }

                if (state.taskList) {
                    var taskOpen = stream.match(taskListRE, true)[1] === ' '
                    if (taskOpen) state.taskOpen = true
                    else state.taskClosed = true
                    if (modeCfg.highlightFormatting) state.formatting = 'task'
                    state.taskList = false
                    return getType(state)
                }

                state.taskOpen = false
                state.taskClosed = false

                if (state.header && stream.match(/^#+$/, true)) {
                    if (modeCfg.highlightFormatting) state.formatting = 'header'
                    return getType(state)
                }

                var ch = stream.next()

                // Matches link titles present on next line
                if (state.linkTitle) {
                    state.linkTitle = false
                    var matchCh = ch
                    if (ch === '(') {
                        matchCh = ')'
                    }
                    matchCh = (matchCh + '').replace(/([.?*+^\[\]\\(){}|-])/g, '\\$1')
                    var regex = '^\\s*(?:[^' + matchCh + '\\\\]+|\\\\\\\\|\\\\.)' + matchCh
                    if (stream.match(new RegExp(regex), true)) {
                        return tokenTypes.linkHref
                    }
                }

                // If this block is changed, it may need to be updated in GFM mode
                if (ch === '`') {
                    var previousFormatting = state.formatting
                    if (modeCfg.highlightFormatting) state.formatting = 'code'
                    stream.eatWhile('`')
                    var count = stream.current().length
                    if (state.code == 0 && (!state.quote || count == 1)) {
                        state.code = count
                        return getType(state)
                    } else if (count == state.code) {
                        // Must be exact
                        var t = getType(state)
                        state.code = 0
                        return t
                    } else {
                        state.formatting = previousFormatting
                        return getType(state)
                    }
                } else if (state.code) {
                    return getType(state)
                }

                if (ch === '\\') {
                    stream.next()
                    if (modeCfg.highlightFormatting) {
                        var type = getType(state)
                        var formattingEscape = tokenTypes.formatting + '-escape'
                        return type ? type + ' ' + formattingEscape : formattingEscape
                    }
                }

                if (ch === '!' && stream.match(/\[[^\]]*\] ?(?:\(|\[)/, false)) {
                    state.imageMarker = true
                    state.image = true
                    if (modeCfg.highlightFormatting) state.formatting = 'image'
                    return getType(state)
                }

                if (ch === '[' && state.imageMarker && stream.match(/[^\]]*\](\(.*?\)| ?\[.*?\])/, false)) {
                    state.imageMarker = false
                    state.imageAltText = true
                    if (modeCfg.highlightFormatting) state.formatting = 'image'
                    return getType(state)
                }

                if (ch === ']' && state.imageAltText) {
                    if (modeCfg.highlightFormatting) state.formatting = 'image'
                    var type = getType(state)
                    state.imageAltText = false
                    state.image = false
                    state.inline = state.f = linkHref
                    return type
                }

                if (ch === '[' && !state.image) {
                    if (state.linkText && stream.match(/^.*?\]/)) return getType(state)
                    state.linkText = true
                    if (modeCfg.highlightFormatting) state.formatting = 'link'
                    return getType(state)
                }

                if (ch === ']' && state.linkText) {
                    if (modeCfg.highlightFormatting) state.formatting = 'link'
                    var type = getType(state)
                    state.linkText = false
                    state.inline = state.f = stream.match(/\(.*?\)| ?\[.*?\]/, false) ? linkHref : inlineNormal
                    return type
                }

                if (ch === '<' && stream.match(/^(https?|ftps?):\/\/(?:[^\\>]|\\.)+>/, false)) {
                    state.f = state.inline = linkInline
                    if (modeCfg.highlightFormatting) state.formatting = 'link'
                    var type = getType(state)
                    if (type) {
                        type += ' '
                    } else {
                        type = ''
                    }
                    return type + tokenTypes.linkInline
                }

                if (ch === '<' && stream.match(/^[^> \\]+@(?:[^\\>]|\\.)+>/, false)) {
                    state.f = state.inline = linkInline
                    if (modeCfg.highlightFormatting) state.formatting = 'link'
                    var type = getType(state)
                    if (type) {
                        type += ' '
                    } else {
                        type = ''
                    }
                    return type + tokenTypes.linkEmail
                }

                if (modeCfg.xml && ch === '<' && stream.match(/^(!--|\?|!\[CDATA\[|[a-z][a-z0-9-]*(?:\s+[a-z_:.\-]+(?:\s*=\s*[^>]+)?)*\s*(?:>|$))/i, false)) {
                    var end = stream.string.indexOf('>', stream.pos)
                    if (end != -1) {
                        var atts = stream.string.substring(stream.start, end)
                        if (/markdown\s*=\s*('|"){0,1}1('|"){0,1}/.test(atts)) state.md_inside = true
                    }
                    stream.backUp(1)
                    state.htmlState = CodeMirror.startState(htmlMode)
                    return switchBlock(stream, state, htmlBlock)
                }

                if (modeCfg.xml && ch === '<' && stream.match(/^\/\w*?>/)) {
                    state.md_inside = false
                    return 'tag'
                } else if (ch === '*' || ch === '_') {
                    var len = 1,
                        before = stream.pos == 1 ? ' ' : stream.string.charAt(stream.pos - 2)
                    while (len < 3 && stream.eat(ch)) len++
                    var after = stream.peek() || ' '
                    // See http://spec.commonmark.org/0.27/#emphasis-and-strong-emphasis
                    var leftFlanking = !/\s/.test(after) && (!punctuation.test(after) || /\s/.test(before) || punctuation.test(before))
                    var rightFlanking = !/\s/.test(before) && (!punctuation.test(before) || /\s/.test(after) || punctuation.test(after))
                    var setEm = null,
                        setStrong = null
                    if (len % 2) {
                        // Em
                        if (!state.em && leftFlanking && (ch === '*' || !rightFlanking || punctuation.test(before))) setEm = true
                        else if (state.em == ch && rightFlanking && (ch === '*' || !leftFlanking || punctuation.test(after))) setEm = false
                    }
                    if (len > 1) {
                        // Strong
                        if (!state.strong && leftFlanking && (ch === '*' || !rightFlanking || punctuation.test(before))) setStrong = true
                        else if (state.strong == ch && rightFlanking && (ch === '*' || !leftFlanking || punctuation.test(after))) setStrong = false
                    }
                    if (setStrong != null || setEm != null) {
                        if (modeCfg.highlightFormatting) state.formatting = setEm == null ? 'strong' : setStrong == null ? 'em' : 'strong em'
                        if (setEm === true) state.em = ch
                        if (setStrong === true) state.strong = ch
                        var t = getType(state)
                        if (setEm === false) state.em = false
                        if (setStrong === false) state.strong = false
                        return t
                    }
                } else if (ch === ' ') {
                    if (stream.eat('*') || stream.eat('_')) {
                        // Probably surrounded by spaces
                        if (stream.peek() === ' ') {
                            // Surrounded by spaces, ignore
                            return getType(state)
                        } else {
                            // Not surrounded by spaces, back up pointer
                            stream.backUp(1)
                        }
                    }
                }

                if (modeCfg.strikethrough) {
                    if (ch === '~' && stream.eatWhile(ch)) {
                        if (state.strikethrough) {
                            // Remove strikethrough
                            if (modeCfg.highlightFormatting) state.formatting = 'strikethrough'
                            var t = getType(state)
                            state.strikethrough = false
                            return t
                        } else if (stream.match(/^[^\s]/, false)) {
                            // Add strikethrough
                            state.strikethrough = true
                            if (modeCfg.highlightFormatting) state.formatting = 'strikethrough'
                            return getType(state)
                        }
                    } else if (ch === ' ') {
                        if (stream.match('~~', true)) {
                            // Probably surrounded by space
                            if (stream.peek() === ' ') {
                                // Surrounded by spaces, ignore
                                return getType(state)
                            } else {
                                // Not surrounded by spaces, back up pointer
                                stream.backUp(2)
                            }
                        }
                    }
                }

                if (modeCfg.emoji && ch === ':' && stream.match(/^(?:[a-z_\d+][a-z_\d+-]*|\-[a-z_\d+][a-z_\d+-]*):/)) {
                    state.emoji = true
                    if (modeCfg.highlightFormatting) state.formatting = 'emoji'
                    var retType = getType(state)
                    state.emoji = false
                    return retType
                }

                if (ch === ' ') {
                    if (stream.match(/^ +$/, false)) {
                        state.trailingSpace++
                    } else if (state.trailingSpace) {
                        state.trailingSpaceNewLine = true
                    }
                }

                return getType(state)
            }

            function linkInline(stream, state) {
                var ch = stream.next()

                if (ch === '>') {
                    state.f = state.inline = inlineNormal
                    if (modeCfg.highlightFormatting) state.formatting = 'link'
                    var type = getType(state)
                    if (type) {
                        type += ' '
                    } else {
                        type = ''
                    }
                    return type + tokenTypes.linkInline
                }

                stream.match(/^[^>]+/, true)

                return tokenTypes.linkInline
            }

            function linkHref(stream, state) {
                // Check if space, and return NULL if so (to avoid marking the space)
                if (stream.eatSpace()) {
                    return null
                }
                var ch = stream.next()
                if (ch === '(' || ch === '[') {
                    state.f = state.inline = getLinkHrefInside(ch === '(' ? ')' : ']')
                    if (modeCfg.highlightFormatting) state.formatting = 'link-string'
                    state.linkHref = true
                    return getType(state)
                }
                return 'error'
            }

            var linkRE = {
                ')': /^(?:[^\\\(\)]|\\.|\((?:[^\\\(\)]|\\.)*\))*?(?=\))/,
                ']': /^(?:[^\\\[\]]|\\.|\[(?:[^\\\[\]]|\\.)*\])*?(?=\])/,
            }

            function getLinkHrefInside(endChar) {
                return function (stream, state) {
                    var ch = stream.next()

                    if (ch === endChar) {
                        state.f = state.inline = inlineNormal
                        if (modeCfg.highlightFormatting) state.formatting = 'link-string'
                        var returnState = getType(state)
                        state.linkHref = false
                        return returnState
                    }

                    stream.match(linkRE[endChar])
                    state.linkHref = true
                    return getType(state)
                }
            }

            function footnoteLink(stream, state) {
                if (stream.match(/^([^\]\\]|\\.)*\]:/, false)) {
                    state.f = footnoteLinkInside
                    stream.next() // Consume [
                    if (modeCfg.highlightFormatting) state.formatting = 'link'
                    state.linkText = true
                    return getType(state)
                }
                return switchInline(stream, state, inlineNormal)
            }

            function footnoteLinkInside(stream, state) {
                if (stream.match(']:', true)) {
                    state.f = state.inline = footnoteUrl
                    if (modeCfg.highlightFormatting) state.formatting = 'link'
                    var returnType = getType(state)
                    state.linkText = false
                    return returnType
                }

                stream.match(/^([^\]\\]|\\.)+/, true)

                return tokenTypes.linkText
            }

            function footnoteUrl(stream, state) {
                // Check if space, and return NULL if so (to avoid marking the space)
                if (stream.eatSpace()) {
                    return null
                }
                // Match URL
                stream.match(/^[^\s]+/, true)
                // Check for link title
                if (stream.peek() === undefined) {
                    // End of line, set flag to check next line
                    state.linkTitle = true
                } else {
                    // More content on line, check if link title
                    stream.match(/^(?:\s+(?:"(?:[^"\\]|\\.)+"|'(?:[^'\\]|\\.)+'|\((?:[^)\\]|\\.)+\)))?/, true)
                }
                state.f = state.inline = inlineNormal
                return tokenTypes.linkHref + ' url'
            }

            var mode = {
                startState: function () {
                    return {
                        f: blockNormal,

                        prevLine: { stream: null },
                        thisLine: { stream: null },

                        block: blockNormal,
                        htmlState: null,
                        indentation: 0,

                        inline: inlineNormal,
                        text: handleText,

                        formatting: false,
                        linkText: false,
                        linkHref: false,
                        linkTitle: false,
                        code: 0,
                        em: false,
                        strong: false,
                        header: 0,
                        setext: 0,
                        hr: false,
                        taskList: false,
                        list: false,
                        listStack: [],
                        quote: 0,
                        trailingSpace: 0,
                        trailingSpaceNewLine: false,
                        strikethrough: false,
                        emoji: false,
                        fencedEndRE: null,
                    }
                },

                copyState: function (s) {
                    return {
                        f: s.f,

                        prevLine: s.prevLine,
                        thisLine: s.thisLine,

                        block: s.block,
                        htmlState: s.htmlState && CodeMirror.copyState(htmlMode, s.htmlState),
                        indentation: s.indentation,

                        localMode: s.localMode,
                        localState: s.localMode ? CodeMirror.copyState(s.localMode, s.localState) : null,

                        inline: s.inline,
                        text: s.text,
                        formatting: false,
                        linkText: s.linkText,
                        linkTitle: s.linkTitle,
                        linkHref: s.linkHref,
                        code: s.code,
                        em: s.em,
                        strong: s.strong,
                        strikethrough: s.strikethrough,
                        emoji: s.emoji,
                        header: s.header,
                        setext: s.setext,
                        hr: s.hr,
                        taskList: s.taskList,
                        list: s.list,
                        listStack: s.listStack.slice(0),
                        quote: s.quote,
                        indentedCode: s.indentedCode,
                        trailingSpace: s.trailingSpace,
                        trailingSpaceNewLine: s.trailingSpaceNewLine,
                        md_inside: s.md_inside,
                        fencedEndRE: s.fencedEndRE,
                    }
                },

                token: function (stream, state) {
                    // Reset state.formatting
                    state.formatting = false

                    if (stream != state.thisLine.stream) {
                        state.header = 0
                        state.hr = false

                        if (stream.match(/^\s*$/, true)) {
                            blankLine(state)
                            return null
                        }

                        state.prevLine = state.thisLine
                        state.thisLine = { stream: stream }

                        // Reset state.taskList
                        state.taskList = false

                        // Reset state.trailingSpace
                        state.trailingSpace = 0
                        state.trailingSpaceNewLine = false

                        if (!state.localState) {
                            state.f = state.block
                            if (state.f != htmlBlock) {
                                var indentation = stream.match(/^\s*/, true)[0].replace(/\t/g, expandedTab).length
                                state.indentation = indentation
                                state.indentationDiff = null
                                if (indentation > 0) return null
                            }
                        }
                    }
                    return state.f(stream, state)
                },

                innerMode: function (state) {
                    if (state.block == htmlBlock) return { state: state.htmlState, mode: htmlMode }
                    if (state.localState) return { state: state.localState, mode: state.localMode }
                    return { state: state, mode: mode }
                },

                indent: function (state, textAfter, line) {
                    if (state.block == htmlBlock && htmlMode.indent) return htmlMode.indent(state.htmlState, textAfter, line)
                    if (state.localState && state.localMode.indent) return state.localMode.indent(state.localState, textAfter, line)
                    return CodeMirror.Pass
                },

                blankLine: blankLine,

                getType: getType,

                blockCommentStart: '<!--',
                blockCommentEnd: '-->',
                closeBrackets: '()[]{}\'\'""``',
                fold: 'markdown',
            }
            return mode
        },
        'xml'
    )

    CodeMirror.defineMIME('text/markdown', 'markdown')

    CodeMirror.defineMIME('text/x-markdown', 'markdown')
})