pro-docs/libs/codemirror/mode/gfm/gfm.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('../markdown/markdown'), require('../../addon/mode/overlay'))
    else if (typeof define == 'function' && define.amd)
        // AMD
        define(['../../lib/codemirror', '../markdown/markdown', '../../addon/mode/overlay'], mod)
    // Plain browser env
    else mod(CodeMirror)
})(function (CodeMirror) {
    'use strict'

    var urlRE =
        /^((?:(?:aaas?|about|acap|adiumxtra|af[ps]|aim|apt|attachment|aw|beshare|bitcoin|bolo|callto|cap|chrome(?:-extension)?|cid|coap|com-eventbrite-attendee|content|crid|cvs|data|dav|dict|dlna-(?:playcontainer|playsingle)|dns|doi|dtn|dvb|ed2k|facetime|feed|file|finger|fish|ftp|geo|gg|git|gizmoproject|go|gopher|gtalk|h323|hcp|https?|iax|icap|icon|im|imap|info|ipn|ipp|irc[6s]?|iris(?:\.beep|\.lwz|\.xpc|\.xpcs)?|itms|jar|javascript|jms|keyparc|lastfm|ldaps?|magnet|mailto|maps|market|message|mid|mms|ms-help|msnim|msrps?|mtqp|mumble|mupdate|mvn|news|nfs|nih?|nntp|notes|oid|opaquelocktoken|palm|paparazzi|platform|pop|pres|proxy|psyc|query|res(?:ource)?|rmi|rsync|rtmp|rtsp|secondlife|service|session|sftp|sgn|shttp|sieve|sips?|skype|sm[bs]|snmp|soap\.beeps?|soldat|spotify|ssh|steam|svn|tag|teamspeak|tel(?:net)?|tftp|things|thismessage|tip|tn3270|tv|udp|unreal|urn|ut2004|vemmi|ventrilo|view-source|webcal|wss?|wtai|wyciwyg|xcon(?:-userid)?|xfire|xmlrpc\.beeps?|xmpp|xri|ymsgr|z39\.50[rs]?):(?:\/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}\/)(?:[^\s()<>]|\([^\s()<>]*\))+(?:\([^\s()<>]*\)|[^\s`*!()\[\]{};:'".,<>?«»“”‘’]))/i

    CodeMirror.defineMode(
        'gfm',
        function (config, modeConfig) {
            var codeDepth = 0
            function blankLine(state) {
                state.code = false
                return null
            }
            var gfmOverlay = {
                startState: function () {
                    return {
                        code: false,
                        codeBlock: false,
                        ateSpace: false,
                    }
                },
                copyState: function (s) {
                    return {
                        code: s.code,
                        codeBlock: s.codeBlock,
                        ateSpace: s.ateSpace,
                    }
                },
                token: function (stream, state) {
                    state.combineTokens = null

                    // Hack to prevent formatting override inside code blocks (block and inline)
                    if (state.codeBlock) {
                        if (stream.match(/^```+/)) {
                            state.codeBlock = false
                            return null
                        }
                        stream.skipToEnd()
                        return null
                    }
                    if (stream.sol()) {
                        state.code = false
                    }
                    if (stream.sol() && stream.match(/^```+/)) {
                        stream.skipToEnd()
                        state.codeBlock = true
                        return null
                    }
                    // If this block is changed, it may need to be updated in Markdown mode
                    if (stream.peek() === '`') {
                        stream.next()
                        var before = stream.pos
                        stream.eatWhile('`')
                        var difference = 1 + stream.pos - before
                        if (!state.code) {
                            codeDepth = difference
                            state.code = true
                        } else {
                            if (difference === codeDepth) {
                                // Must be exact
                                state.code = false
                            }
                        }
                        return null
                    } else if (state.code) {
                        stream.next()
                        return null
                    }
                    // Check if space. If so, links can be formatted later on
                    if (stream.eatSpace()) {
                        state.ateSpace = true
                        return null
                    }
                    if (stream.sol() || state.ateSpace) {
                        state.ateSpace = false
                        if (modeConfig.gitHubSpice !== false) {
                            if (stream.match(/^(?:[a-zA-Z0-9\-_]+\/)?(?:[a-zA-Z0-9\-_]+@)?(?=.{0,6}\d)(?:[a-f0-9]{7,40}\b)/)) {
                                // User/Project@SHA
                                // User@SHA
                                // SHA
                                state.combineTokens = true
                                return 'link'
                            } else if (stream.match(/^(?:[a-zA-Z0-9\-_]+\/)?(?:[a-zA-Z0-9\-_]+)?#[0-9]+\b/)) {
                                // User/Project#Num
                                // User#Num
                                // #Num
                                state.combineTokens = true
                                return 'link'
                            }
                        }
                    }
                    if (stream.match(urlRE) && stream.string.slice(stream.start - 2, stream.start) != '](' && (stream.start == 0 || /\W/.test(stream.string.charAt(stream.start - 1)))) {
                        // URLs
                        // Taken from http://daringfireball.net/2010/07/improved_regex_for_matching_urls
                        // And then (issue #1160) simplified to make it not crash the Chrome Regexp engine
                        // And then limited url schemes to the CommonMark list, so foo:bar isn't matched as a URL
                        state.combineTokens = true
                        return 'link'
                    }
                    stream.next()
                    return null
                },
                blankLine: blankLine,
            }

            var markdownConfig = {
                taskLists: true,
                strikethrough: true,
                emoji: true,
            }
            for (var attr in modeConfig) {
                markdownConfig[attr] = modeConfig[attr]
            }
            markdownConfig.name = 'markdown'
            return CodeMirror.overlayMode(CodeMirror.getMode(config, markdownConfig), gfmOverlay)
        },
        'markdown'
    )

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