Home-Data/public/static/user/js/jquery.scrollbar.js

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(function($) {
    $.tiny = $.tiny || {};
    $.tiny.scrollbar = {
        options: {
            axis: 'y',
            wheel: true,
            wheelSpeed: 60,
            wheelLock: true,
            scrollInvert: false,
            trackSize: false,
            thumbSize: false
        }
    };
    $.fn.welivebar = function(params) {
        var options = $.extend({}, $.tiny.scrollbar.options, params);
        this.each(function() {
            $(this).data('tsb', new Scrollbar($(this), options))
        });
        return this
    };
    $.fn.welivebar_update = function(sScroll) {
        return $(this).data('tsb').update(sScroll)
    };

    function Scrollbar($container, options) {
        var self = this,
            $viewport = $container.find(".viewport"),
            $overview = $container.find(".overview"),
            $scrollbar = $container.find(".scb_scrollbar"),
            $track = $scrollbar.find(".scb_tracker"),
            $thumb = $scrollbar.find(".scb_mover"),
            viewportSize = 0,
            contentSize = 0,
            contentPosition = 0,
            contentRatio = 0,
            trackSize = 0,
            trackRatio = 1,
            thumbSize = 0,
            thumbPosition = 0,
            mousePosition = 0,
            isdraging = 0,
            isHorizontal = options.axis === 'x',
            hasTouchEvents = "ontouchstart" in document.documentElement,
            sizeLabel = isHorizontal ? "width" : "height",
            posiLabel = isHorizontal ? "left" : "top";

        function initialize() {
            self.update();
            setEvents();
            return self
        }
        this.update = function(scrollTo) {
            sizeLabelCap = sizeLabel.charAt(0).toUpperCase() + sizeLabel.slice(1).toLowerCase();
            viewportSize = $viewport[0]['offset' + sizeLabelCap];
            contentSize = $overview[0]['scroll' + sizeLabelCap];
            if (viewportSize <= 0) viewportSize = 1;
            if (contentSize <= 0) contentSize = 1;
            contentRatio = viewportSize / contentSize;
            trackSize = options.trackSize || viewportSize;
            thumbSize = Math.min(trackSize, Math.max(0, (options.thumbSize || (trackSize * contentRatio))));
            if (thumbSize < 40) thumbSize = 40;
            if (options.thumbSize) {
                var x = trackSize - thumbSize;
                if (x == 0) x = 1;
                trackRatio = (contentSize - viewportSize) / x
            } else {
                trackRatio = contentSize / trackSize
            } if (contentRatio < 1 && !isdraging) {
                switch (scrollTo) {
                    case "bottom":
                        contentPosition = contentSize - viewportSize;
                        break;
                    case "relative":
                        contentPosition = Math.min(contentSize - viewportSize, Math.max(0, contentPosition));
                        break;
                    default:
                        contentPosition = parseInt(scrollTo, 10) || 0
                }
            } else {
                $scrollbar.hide()
            }
			checkshow();
            setSize()
        };

        function checkshow() {
            if (contentRatio < 1 && $scrollbar.is(":hidden")) {
                $viewport.width($viewport.width());
                $scrollbar.show();
                if (!mousePosition) mousePosition = $thumb.offset()[posiLabel]
            }
        }

        function checkhide() {
            if (contentRatio < 1 && $scrollbar.is(":visible")) {
                $viewport.width($viewport.width());
                $scrollbar.hide()
            }
        }

        function setSize() {
            $thumb.css(posiLabel, contentPosition / (trackRatio == 0 ? 1 : trackRatio));
            $overview.css(posiLabel, -contentPosition);
            mousePosition = $thumb.offset()[posiLabel];
            $scrollbar.css(sizeLabel, trackSize);
            $track.css(sizeLabel, trackSize);
            $thumb.css(sizeLabel, thumbSize)
        }

        function setEvents() {
            if (hasTouchEvents) {
                $viewport[0].ontouchstart = function(event) {
                    if (1 === event.touches.length) {
                        start(event.touches[0]);
                        event.stopPropagation()
                    }
                }
            } else {
                $thumb.bind("mousedown", start);
                $track.bind("mouseup", drag)
            } if (options.wheel && window.addEventListener) {
                $container[0].addEventListener("DOMMouseScroll", wheel, false);
                $container[0].addEventListener("mousewheel", wheel, false)
            } else if (options.wheel) {
                $container[0].onmousewheel = wheel
            }
        }

        function start(event) {
            mousePosition = isHorizontal ? event.pageX : event.pageY;
            thumbPosition = parseInt($thumb.css(posiLabel), 10) || 0;
            isdraging = 1;
            if (hasTouchEvents) {
                document.ontouchmove = function(event) {
                    event.preventDefault();
                    drag(event.touches[0])
                };
                document.ontouchend = end
            } else {
                $(document).bind("mousemove", drag);
                $(document).bind("mouseup", end);
                $thumb.bind("mouseup", end)
            }
        }

        function wheel(event) {
            if (contentRatio < 1) {
                var eventObject = event || window.event,
                 wheelSpeedDelta = eventObject.wheelDelta ? eventObject.wheelDelta / 120 : -eventObject.detail / 3;
                contentPosition -= wheelSpeedDelta * options.wheelSpeed;
                contentPosition = Math.min((contentSize - viewportSize), Math.max(0, contentPosition));
                $thumb.css(posiLabel, contentPosition / (trackRatio == 0 ? 1 : trackRatio));
                $overview.css(posiLabel, -contentPosition);
                if (options.wheelLock || (contentPosition !== (contentSize - viewportSize) && contentPosition !== 0)) {
                    eventObject = $.event.fix(eventObject);
                    eventObject.preventDefault()
                }
            }
        }

        function drag(event) {
            window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
            if (contentRatio < 1) {
                mousePositionNew = isHorizontal ? event.pageX : event.pageY;
                thumbPositionDelta = mousePositionNew - mousePosition;
                if (options.scrollInvert) {
                    thumbPositionDelta = mousePosition - mousePositionNew
                }
                thumbPositionNew = Math.min((trackSize - thumbSize), Math.max(0, thumbPosition + thumbPositionDelta));
                contentPosition = thumbPositionNew * trackRatio;
                $thumb.css(posiLabel, thumbPositionNew);
                $overview.css(posiLabel, -contentPosition)
            }
        }

        function end() {
            isdraging = 0;
            $(document).unbind("mousemove", drag);
            $(document).unbind("mouseup", end);
            $thumb.unbind("mouseup", end);
            document.ontouchmove = document.ontouchend = null
        }
        return initialize()
    }
})(jQuery);