/**
* jQuery.smoothDivScroll - Smooth div scrolling using jQuery.
* This plugin is for turning a set of HTML elements's into a smooth scrolling area.
*
* Copyright (c) 2009 Thomas Kahn - thomas.kahn(at)karnhuset(dot)net
*
* This plugin is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This plugin is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details. <http://www.gnu.org/licenses/>.
*
* Date: 2009-07-05
* @author Thomas Kahn
* @version 0.9
*
* Changelog
* ---------------------------------------------
* 0.9	- Bugfixes: Problem with multiple autoscrollers on the same page - the intervals
*		  where global which resulted in the wrong autoscroller stopping on mouseOver or
*		  mouseDown.
*		  Error in calculation in autoscrolling mode that made the autoscrolling grind
*		  to a halt after a number of loops.
*
* 0.8   - Major update. New parameter setup. Lots of new autoscrolling capabilities and 
*		  new parameters for controlling the scrolling speed. Made it possible to start 
*		  the scroller at a specific element.
* 
* 0.7   - Added support for autoscrolling after the page has loaded. 
*         Added support for making the hot spots visible at start for X number of seconds
*         or visible all the time.
*
* 0.6   - First version.
*/

(function($) {
    jQuery.fn.smoothDivScroll = function(options) {
        var defaults = { scrollingHotSpotLeft: "div.scrollingHotSpotLeft", scrollingHotSpotRight: "div.scrollingHotSpotRight", scrollWrapper: "div.scrollWrapper", scrollableArea: "div.scrollableArea", hiddenOnStart: false, ajaxContentURL: "", countOnlyClass: "", scrollingSpeed: 25, mouseDownSpeedBooster: 3, autoScroll: "", autoScrollDirection: "right", autoScrollSpeed: 1, pauseAutoScroll: "", visibleHotSpots: "", hotSpotsVisibleTime: 5, startAtElementId: "" }; options = $.extend(defaults, options); return this.each(function() {
            var $mom = $(this); if (options.ajaxContentURL.length !== 0) {
                $mom.scrollableAreaWidth = 0; $mom.find(options.scrollableArea).load((options.ajaxContentURL), function() {
                    $mom.find(options.scrollableArea).children((options.countOnlyClass)).each(function() { $mom.scrollableAreaWidth = $mom.scrollableAreaWidth + $(this).outerWidth(true); }); $mom.find(options.scrollableArea).css("width", ($mom.scrollableAreaWidth + "px")); if (options.hiddenOnStart) { $mom.hide(); }
                    windowIsResized(); setHotSpotHeightForIE();
                });
            }
            var scrollXpos; var booster; var motherElementOffset = $mom.offset().left; var hotSpotWidth = 0; booster = 1; var hasExtended = false; $(window).one("load", function() {
                if (options.ajaxContentURL.length === 0) {
                    $mom.scrollableAreaWidth = 0; $mom.tempStartingPosition = 0; $mom.find(options.scrollableArea).children((options.countOnlyClass)).each(function() {
                        if ((options.startAtElementId.length !== 0) && (($(this).attr("id")) == options.startAtElementId)) { $mom.tempStartingPosition = $mom.scrollableAreaWidth; }
                        $mom.scrollableAreaWidth = $mom.scrollableAreaWidth + $(this).outerWidth(true);
                    }); $mom.find(options.scrollableArea).css("width", $mom.scrollableAreaWidth + "px"); if (options.hiddenOnStart) { $mom.hide(); }
                }
                $mom.find(options.scrollWrapper).scrollLeft($mom.tempStartingPosition); if (options.autoScroll !== "") { $mom.autoScrollInterval = setInterval(autoScroll, 6); }
                if (options.autoScroll == "always")
                { hideLeftHotSpot(); hideRightHotSpot(); }
                switch (options.visibleHotSpots)
                { case "always": makeHotSpotBackgroundsVisible(); break; case "onstart": makeHotSpotBackgroundsVisible(); $mom.hideHotSpotBackgroundsInterval = setInterval(hideHotSpotBackgrounds, (options.hotSpotsVisibleTime * 1000)); break; default: break; }
            }); $mom.find(options.scrollingHotSpotRight, options.scrollingHotSpotLeft).one('mouseover', function() { if (options.autoScroll == "onstart") { clearInterval($mom.autoScrollInterval); } }); $(window).bind("resize", function() { windowIsResized(); }); function windowIsResized() {
                if (!(options.hiddenOnStart))
                { $mom.scrollableAreaWidth = 0; $mom.find(options.scrollableArea).children((options.countOnlyClass)).each(function() { $mom.scrollableAreaWidth = $mom.scrollableAreaWidth + $(this).outerWidth(true); }); $mom.find(options.scrollableArea).css("width", $mom.scrollableAreaWidth + 'px'); }
                $mom.find(options.scrollWrapper).scrollLeft("0"); var bodyWidth = $("body").innerWidth(); if (options.autoScroll !== "always") {
                    if ($mom.scrollableAreaWidth < bodyWidth)
                    { hideLeftHotSpot(); hideRightHotSpot(); }
                    else
                    { showHideHotSpots(); }
                }
            }
            function hideLeftHotSpot() { /*$mom.find(options.scrollingHotSpotLeft).hide();*/ }
            function hideRightHotSpot() { /* $mom.find(options.scrollingHotSpotRight).hide(); */ }
            function showLeftHotSpot() { $mom.find(options.scrollingHotSpotLeft).show(); if (hotSpotWidth <= 0) { hotSpotWidth = $mom.find(options.scrollingHotSpotLeft).width(); } }
            function showRightHotSpot() { $mom.find(options.scrollingHotSpotRight).show(); if (hotSpotWidth <= 0) { hotSpotWidth = $mom.find(options.scrollingHotSpotRight).width(); } }
            function setHotSpotHeightForIE() {
                jQuery.each(jQuery.browser, function(i, val) {
                    if (i == "msie" && jQuery.browser.version.substr(0, 1) == "6")
                    { $mom.find(options.scrollingHotSpotLeft).css("height", ($mom.find(options.scrollableArea).innerHeight())); $mom.find(options.scrollingHotSpotRight).css("height", ($mom.find(options.scrollableArea).innerHeight())); }
                });
            }
            $mom.find(options.scrollingHotSpotRight).bind('mousemove', function(e) { var x = e.pageX - (this.offsetLeft + motherElementOffset); scrollXpos = Math.round((x / hotSpotWidth) * options.scrollingSpeed); if (scrollXpos === Infinity) { scrollXpos = 0; } }); $mom.find(options.scrollingHotSpotRight).bind('mouseover', function() {
                if (options.autoScroll == "onstart") { clearInterval($mom.autoScrollInterval); }
                $mom.rightScrollInterval = setInterval(doScrollRight, 6);
            }); $mom.find(options.scrollingHotSpotRight).bind('mouseout', function() { clearInterval($mom.rightScrollInterval); scrollXpos = 0; }); $mom.find(options.scrollingHotSpotRight).bind('mousedown', function() { booster = options.mouseDownSpeedBooster; }); $("*").bind('mouseup', function() { booster = 1; }); var doScrollRight = function() {
                if (scrollXpos > 0) { $mom.find(options.scrollWrapper).scrollLeft($mom.find(options.scrollWrapper).scrollLeft() + (scrollXpos * booster * 5)); }
                showHideHotSpots();
            };
            //if (options.pauseAutoScroll == "mousedown" && options.autoScroll == "always")
            //            { $mom.find(options.scrollWrapper).bind('mousedown', function() { clearInterval($mom.autoScrollInterval); }); $mom.find(options.scrollWrapper).bind('mouseup', function() { $mom.autoScrollInterval = setInterval(autoScroll, 6); }); }
            //            else if (options.pauseAutoScroll == "mouseover" && options.autoScroll == "always")
            //            { $mom.find(options.scrollWrapper).bind('mouseover', function() { clearInterval($mom.autoScrollInterval); }); $mom.find(options.scrollWrapper).bind('mouseout', function() { $mom.autoScrollInterval = setInterval(autoScroll, 6); }); }
            if (options.pauseAutoScroll == "mousedown")
            { $mom.find(options.scrollableArea).bind('mousedown', function() { clearInterval($mom.autoScrollInterval); }); $mom.find(options.scrollableArea).bind('mouseup', function() { $mom.autoScrollInterval = setInterval(autoScroll, 6); }); }
            else if (options.pauseAutoScroll == "mouseover")
            { $mom.find(options.scrollableArea).bind('mouseover', function() { clearInterval($mom.autoScrollInterval); }); $mom.find(options.scrollableArea).bind('mouseout', function() { $mom.autoScrollInterval = setInterval(autoScroll, 6); }); }
            //$mom.find('div.makeMeScrollable').bind('mouseout', function() { alert('jsahf'); $mom.autoScrollInterval = setInterval(autoScroll, 6); });
            //$mom.find('div.makeMeScrollable').bind('mouseout', function() { alert('dffd'); $mom.autoScrollInterval = setInterval(autoScroll, 6); });
            //$mom.find(options.scrollableArea).bind('mouseover', function() { clearInterval($mom.autoScrollInterval); });
            //$mom.find(options.scrollableArea).bind('mouseout', function() { clearInterval($mom.autoScrollInterval); $mom.autoScrollInterval = setInterval(autoScroll, 6); });
            $mom.previousScrollLeft = 0; $mom.pingPongDirection = "right"; $mom.swapAt; $mom.getNextElementWidth = true; var autoScroll = function() {
                if (options.autoScroll == "onstart") { showHideHotSpots(); }
                switch (options.autoScrollDirection) {
                    case "right": $mom.find(options.scrollWrapper).scrollLeft($mom.find(options.scrollWrapper).scrollLeft() + options.autoScrollSpeed); break; case "left": $mom.find(options.scrollWrapper).scrollLeft($mom.find(options.scrollWrapper).scrollLeft() - options.autoScrollSpeed); break; case "backandforth": $mom.previousScrollLeft = $mom.find(options.scrollWrapper).scrollLeft(); if ($mom.pingPongDirection == "right") { $mom.find(options.scrollWrapper).scrollLeft($mom.find(options.scrollWrapper).scrollLeft() + options.autoScrollSpeed); }
                        else { $mom.find(options.scrollWrapper).scrollLeft($mom.find(options.scrollWrapper).scrollLeft() - options.autoScrollSpeed); }
                        if ($mom.previousScrollLeft === $mom.find(options.scrollWrapper).scrollLeft()) {
                            if ($mom.pingPongDirection == "right") { $mom.pingPongDirection = "left"; }
                            else { $mom.pingPongDirection = "right"; }
                        }
                        break; case "endlessloop": if ($mom.getNextElementWidth) {
                            if (options.startAtElementId !== "") { $mom.swapAt = $("#" + options.startAtElementId).outerWidth(); }
                            else { $mom.swapAt = $mom.find(options.scrollableArea).children(":first-child").outerWidth(); }
                            $mom.getNextElementWidth = false;
                        }
                        $mom.find(options.scrollWrapper).scrollLeft($mom.find(options.scrollWrapper).scrollLeft() + options.autoScrollSpeed); if (($mom.swapAt <= $mom.find(options.scrollWrapper).scrollLeft()))
                        { $mom.find(options.scrollableArea).append($mom.find(options.scrollableArea).children(":first-child").clone()); $mom.find(options.scrollWrapper).scrollLeft(($mom.find(options.scrollWrapper).scrollLeft() - $mom.find(options.scrollableArea).children(":first-child").outerWidth())); $mom.find(options.scrollableArea).children(":first-child").remove(); $mom.getNextElementWidth = true; }
                        break; default: break;
                }
            }; $mom.find(options.scrollingHotSpotLeft).bind('mousemove', function(e) {
                var x = $mom.find(options.scrollingHotSpotLeft).innerWidth() - (e.pageX - motherElementOffset); scrollXpos = Math.round((x / hotSpotWidth) * options.scrollingSpeed); if (scrollXpos === Infinity)
                { scrollXpos = 0; }
            }); $mom.find(options.scrollingHotSpotLeft).bind('mouseover', function() {
                if (options.autoScroll == "onstart") { clearInterval($mom.autoScrollInterval); }
                $mom.leftScrollInterval = setInterval(doScrollLeft, 6);
            }); $mom.find(options.scrollingHotSpotLeft).bind('mouseout', function() { clearInterval($mom.leftScrollInterval); scrollXpos = 0; }); $mom.find(options.scrollingHotSpotLeft).bind('mousedown', function() { booster = options.mouseDownSpeedBooster; }); var doScrollLeft = function() {
                if (scrollXpos > 0) { $mom.find(options.scrollWrapper).scrollLeft($mom.find(options.scrollWrapper).scrollLeft() - (scrollXpos * booster * 5)); }
                showHideHotSpots();
            }; function showHideHotSpots() {
                if ($mom.find(options.scrollWrapper).scrollLeft() === 0)
                { hideLeftHotSpot(); showRightHotSpot(); }
                else if (($mom.scrollableAreaWidth) <= ($mom.find(options.scrollWrapper).innerWidth() + $mom.find(options.scrollWrapper).scrollLeft()))
                { hideRightHotSpot(); showLeftHotSpot(); }
                else
                { showRightHotSpot(); showLeftHotSpot(); }
            }
            function makeHotSpotBackgroundsVisible()
            { $mom.find(options.scrollingHotSpotLeft).addClass("scrollingHotSpotLeftVisible"); $mom.find(options.scrollingHotSpotRight).addClass("scrollingHotSpotRightVisible"); }
            function hideHotSpotBackgrounds()
            { clearInterval($mom.hideHotSpotBackgroundsInterval); $mom.find(options.scrollingHotSpotLeft).fadeTo("slow", 0.0, function() { $mom.find(options.scrollingHotSpotLeft).removeClass("scrollingHotSpotLeftVisible"); }); $mom.find(options.scrollingHotSpotRight).fadeTo("slow", 0.0, function() { $mom.find(options.scrollingHotSpotRight).removeClass("scrollingHotSpotRightVisible"); }); }
        });
    };
})(jQuery);