pro-docs/libs/codemirror/addon/mode/loadmode.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'), 'cjs')
    else if (typeof define == 'function' && define.amd)
        // AMD
        define(['../../lib/codemirror'], function (CM) {
            mod(CM, 'amd')
        })
    // Plain browser env
    else mod(CodeMirror, 'plain')
})(function (CodeMirror, env) {
    if (!CodeMirror.modeURL) CodeMirror.modeURL = '../mode/%N/%N.js'

    var loading = {}
    function splitCallback(cont, n) {
        var countDown = n
        return function () {
            if (--countDown == 0) cont()
        }
    }
    function ensureDeps(mode, cont, options) {
        var modeObj = CodeMirror.modes[mode],
            deps = modeObj && modeObj.dependencies
        if (!deps) return cont()
        var missing = []
        for (var i = 0; i < deps.length; ++i) {
            if (!CodeMirror.modes.hasOwnProperty(deps[i])) missing.push(deps[i])
        }
        if (!missing.length) return cont()
        var split = splitCallback(cont, missing.length)
        for (var i = 0; i < missing.length; ++i) CodeMirror.requireMode(missing[i], split, options)
    }

    CodeMirror.requireMode = function (mode, cont, options) {
        if (typeof mode != 'string') mode = mode.name
        if (CodeMirror.modes.hasOwnProperty(mode)) return ensureDeps(mode, cont, options)
        if (loading.hasOwnProperty(mode)) return loading[mode].push(cont)

        var file = options && options.path ? options.path(mode) : CodeMirror.modeURL.replace(/%N/g, mode)
        if (options && options.loadMode) {
            options.loadMode(file, function () {
                ensureDeps(mode, cont, options)
            })
        } else if (env == 'plain') {
            var script = document.createElement('script')
            script.src = file
            var others = document.getElementsByTagName('script')[0]
            var list = (loading[mode] = [cont])
            CodeMirror.on(script, 'load', function () {
                ensureDeps(
                    mode,
                    function () {
                        for (var i = 0; i < list.length; ++i) list[i]()
                    },
                    options
                )
            })
            others.parentNode.insertBefore(script, others)
        } else if (env == 'cjs') {
            require(file)
            cont()
        } else if (env == 'amd') {
            requirejs([file], cont)
        }
    }

    CodeMirror.autoLoadMode = function (instance, mode, options) {
        if (!CodeMirror.modes.hasOwnProperty(mode))
            CodeMirror.requireMode(
                mode,
                function () {
                    instance.setOption('mode', instance.getOption('mode'))
                },
                options
            )
    }
})