// 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'))
    else if (typeof define == 'function' && define.amd)
        // AMD
        define(['../../lib/codemirror'], mod)
    // Plain browser env
    else mod(CodeMirror)
})(function (CodeMirror) {
    'use strict'

    CodeMirror.defineOption('autoRefresh', false, function (cm, val) {
        if (cm.state.autoRefresh) {
            stopListening(cm, cm.state.autoRefresh)
            cm.state.autoRefresh = null
        }
        if (val && cm.display.wrapper.offsetHeight == 0) startListening(cm, (cm.state.autoRefresh = { delay: val.delay || 250 }))
    })

    function startListening(cm, state) {
        function check() {
            if (cm.display.wrapper.offsetHeight) {
                stopListening(cm, state)
                if (cm.display.lastWrapHeight != cm.display.wrapper.clientHeight) cm.refresh()
            } else {
                state.timeout = setTimeout(check, state.delay)
            }
        }
        state.timeout = setTimeout(check, state.delay)
        state.hurry = function () {
            clearTimeout(state.timeout)
            state.timeout = setTimeout(check, 50)
        }
        CodeMirror.on(window, 'mouseup', state.hurry)
        CodeMirror.on(window, 'keyup', state.hurry)
    }

    function stopListening(_cm, state) {
        clearTimeout(state.timeout)
        CodeMirror.off(window, 'mouseup', state.hurry)
        CodeMirror.off(window, 'keyup', state.hurry)
    }
})