2ch.hk Chrome video player click pause fix

(function() {
    // Вопросы/баги/техподдержка/обучение-бесплатно: github.com/catamphetamine

    var isDraggingVideo = false
    var isClickingVideo = false
    var video
    var videoClickX
    var videoClickY
    var DRAG_THRESHOLD = 4
    var removeVideoClickListener

    function cancelVideoClick(event) {
        event.preventDefault()
        removeVideoClickListener()
    }

    function onMouseDown(event) {
        if (event.target.tagName === 'VIDEO') {
            isClickingVideo = true
            video = event.target
            videoClickX = event.clientX
            videoClickY = event.clientY
        }
    }

    function onMouseUp(event) {
        if (isClickingVideo) {
            reset()
        }
    }

    function onMouseMove(event) {
        if (isClickingVideo && !isDraggingVideo) {
            if (Math.abs(event.clientX - videoClickX) > DRAG_THRESHOLD ||
                Math.abs(event.clientY - videoClickY) > DRAG_THRESHOLD) {
                isDraggingVideo = true
                video.addEventListener('click', cancelVideoClick)
                removeVideoClickListener = (function(video) {
                    return function() {
                        video.removeEventListener('click', cancelVideoClick)
                        removeVideoClickListener = undefined
                    }
                })(video)
            }
        }
    }

    function reset() {
        isDraggingVideo = false
        isClickingVideo = false
        video = undefined
        videoClickX = undefined
        videoClickY = undefined
    }

    window.addEventListener('mousedown', onMouseDown)
    window.addEventListener('mouseup', onMouseUp)
    window.addEventListener('mousemove', onMouseMove)

    console.log('Заплатка для видеоплеера активирована')

    return function() {
        reset()
        if (removeVideoClickListener) {
            removeVideoClickListener()
        }
        window.removeEventListener('mousedown', onMouseDown)
        window.removeEventListener('mouseup', onMouseUp)
        window.removeEventListener('mousemove', onMouseMove)
    }
})()