(function (jQuery) {
    function stripFiletype(ref) { var x = ref.replace('.html', ''); return x.replace('#', ''); }
    function initOrigin(l) {
        if (l.xorigin == 'left') { l.xorigin = 0; } else if (l.xorigin == 'middle' || l.xorigin == 'centre' || l.xorigin == 'center') { l.xorigin = 0.5; } else if (l.xorigin == 'right') { l.xorigin = 1; }
        if (l.yorigin == 'top') { l.yorigin = 0; } else if (l.yorigin == 'middle' || l.yorigin == 'centre' || l.yorigin == 'center') { l.yorigin = 0.5; } else if (l.yorigin == 'bottom') { l.yorigin = 1; } 
    }
    function positionMouse(mouseport, localmouse, virtualmouse) {
        var difference = { x: 0, y: 0, sum: 0 }; if (!mouseport.ontarget) { difference.x = virtualmouse.x - localmouse.x; difference.y = virtualmouse.y - localmouse.y; difference.sum = Math.sqrt(difference.x * difference.x + difference.y * difference.y); virtualmouse.x = localmouse.x + difference.x * mouseport.takeoverFactor; virtualmouse.y = localmouse.y + difference.y * mouseport.takeoverFactor; if (difference.sum < mouseport.takeoverThresh && difference.sum > mouseport.takeoverThresh * -1) { mouseport.ontarget = true; } }
        else { virtualmouse.x = localmouse.x; virtualmouse.y = localmouse.y; } 
    }
    function setupPorts(viewport, mouseport) { var offset = mouseport.element.offset(); jQuery.extend(viewport, { width: viewport.element.width(), height: viewport.element.height() }); jQuery.extend(mouseport, { width: mouseport.element.width(), height: mouseport.element.height(), top: offset.top, left: offset.left }); }
    function parseTravel(travel, origin, dimension) {
        var offset; var cssPos; if (typeof (travel) === 'string') {
            if (travel.search(/^\d+\s?px$/) != -1) { travel = travel.replace('px', ''); travel = parseInt(travel, 10); offset = origin * (dimension - travel); cssPos = origin * 100 + '%'; return { travel: travel, travelpx: true, offset: offset, cssPos: cssPos }; }
            else if (travel.search(/^\d+\s?%$/) != -1) { travel.replace('%', ''); travel = parseInt(travel, 10) / 100; }
            else { travel = 1; } 
        }
        offset = origin * (1 - travel); return { travel: travel, travelpx: false, offset: offset}
    }
    function setupLayer(layer, i, mouseport) {
        var xStuff; var yStuff; var cssObject = {}; layer[i] = jQuery.extend({}, { width: layer[i].element.width(), height: layer[i].element.height() }, layer[i]); xStuff = parseTravel(layer[i].xtravel, layer[i].xorigin, layer[i].width); yStuff = parseTravel(layer[i].ytravel, layer[i].yorigin, layer[i].height); jQuery.extend(layer[i], { diffxrat: mouseport.width / (layer[i].width - mouseport.width), diffyrat: mouseport.height / (layer[i].height - mouseport.height), xtravel: xStuff.travel, ytravel: yStuff.travel, xtravelpx: xStuff.travelpx, ytravelpx: yStuff.travelpx, xoffset: xStuff.offset, yoffset: yStuff.offset }); if (xStuff.travelpx) { cssObject.left = xStuff.cssPos; }
        if (yStuff.travelpx) { cssObject.top = yStuff.cssPos; }
        if (xStuff.travelpx || yStuff.travelpx) { layer[i].element.css(cssObject); } 
    }
    function setupLayerContents(layer, i, viewportOffset) {
        var contentOffset; jQuery.extend(layer[i], { content: [] }); for (var n = 0; n < layer[i].element.children().length; n++) {
            if (!layer[i].content[n]) layer[i].content[n] = {}; if (!layer[i].content[n].element) layer[i].content[n]['element'] = layer[i].element.children().eq(n); if (!layer[i].content[n].anchor && layer[i].content[n].element.children('a').attr('name')) { layer[i].content[n]['anchor'] = layer[i].content[n].element.children('a').attr('name'); }
            if (layer[i].content[n].anchor) { contentOffset = layer[i].content[n].element.offset(); jQuery.extend(layer[i].content[n], { width: layer[i].content[n].element.width(), height: layer[i].content[n].element.height(), x: contentOffset.left - viewportOffset.left, y: contentOffset.top - viewportOffset.top }); jQuery.extend(layer[i].content[n], { posxrat: (layer[i].content[n].x + layer[i].content[n].width / 2) / layer[i].width, posyrat: (layer[i].content[n].y + layer[i].content[n].height / 2) / layer[i].height }); } 
        } 
    }
    function moveLayers(layer, xratio, yratio) {
        var xpos; var ypos; var cssObject; for (var i = 0; i < layer.length; i++) {
            xpos = layer[i].xtravel * xratio + layer[i].xoffset; ypos = layer[i].ytravel * yratio + layer[i].yoffset; cssObject = {}; if (layer[i].xparallax) {
                if (layer[i].xtravelpx) { cssObject.marginLeft = xpos * -1 + 'px'; }
                else { cssObject.left = xpos * 100 + '%'; cssObject.marginLeft = xpos * layer[i].width * -1 + 'px'; } 
            }
            if (layer[i].yparallax) {
                if (layer[i].ytravelpx) { cssObject.marginTop = ypos * -1 + 'px'; }
                else { cssObject.top = ypos * 100 + '%'; cssObject.marginTop = ypos * layer[i].height * -1 + 'px'; } 
            }
            layer[i].element.css(cssObject);
        } 
    }
    jQuery.fn.jparallax = function (options) {
        var settings = jQuery().extend({}, jQuery.fn.jparallax.settings, options); var settingsLayer = { xparallax: settings.xparallax, yparallax: settings.yparallax, xorigin: settings.xorigin, yorigin: settings.yorigin, xtravel: settings.xtravel, ytravel: settings.ytravel }; var settingsMouseport = { element: settings.mouseport, takeoverFactor: settings.takeoverFactor, takeoverThresh: settings.takeoverThresh }; if (settings.mouseport) settingsMouseport['element'] = settings.mouseport; var layersettings = []; for (var a = 1; a < arguments.length; a++) { layersettings.push(jQuery.extend({}, settingsLayer, arguments[a])); }
        return this.each(function () {
            var localmouse = { x: 0.5, y: 0.5 }; var virtualmouse = { x: 0.5, y: 0.5 }; var timer = { running: false, frame: settings.frameDuration, fire: function (x, y) {
                positionMouse(mouseport, localmouse, virtualmouse); moveLayers(layer, virtualmouse.x, virtualmouse.y); this.running = setTimeout(function () {
                    if (localmouse.x != x || localmouse.y != y || !mouseport.ontarget) { timer.fire(localmouse.x, localmouse.y); }
                    else if (timer.running) { timer.running = false; } 
                }, timer.frame);
            } 
            }; var viewport = { element: jQuery(this) }; var mouseport = jQuery.extend({}, { element: viewport.element }, settingsMouseport, { xinside: false, yinside: false, active: false, ontarget: false }); var layer = []; function matrixSearch(layer, ref, callback) {
                for (var i = 0; i < layer.length; i++) { var gotcha = false; for (var n = 0; n < layer[i].content.length; n++) { if (layer[i].content[n].anchor == ref) { callback(i, n); return [i, n]; } } }
                return false;
            }
            setupPorts(viewport, mouseport); for (var i = 0; i < viewport.element.children().length; i++) { layer[i] = jQuery.extend({}, settingsLayer, layersettings[i], { element: viewport.element.children('*:eq(' + i + ')') }); setupLayer(layer, i, mouseport); if (settings.triggerResponse) { setupLayerContents(layer, i, viewport.element.offset()); } }
            viewport.element.children().css('position', 'absolute'); moveLayers(layer, 0.5, 0.5); if (settings.mouseResponse) {
                jQuery().mousemove(function (mouse) {
                    mouseport.xinside = (mouse.pageX >= mouseport.left && mouse.pageX < mouseport.width + mouseport.left) ? true : false; mouseport.yinside = (mouse.pageY >= mouseport.top && mouse.pageY < mouseport.height + mouseport.top) ? true : false; if (mouseport.xinside && mouseport.yinside && !mouseport.active) { mouseport.ontarget = false; mouseport.active = true; }
                    if (mouseport.active) {
                        if (mouseport.xinside) { localmouse.x = (mouse.pageX - mouseport.left) / mouseport.width; }
                        else { localmouse.x = (mouse.pageX < mouseport.left) ? 0 : 1; }
                        if (mouseport.yinside) { localmouse.y = (mouse.pageY - mouseport.top) / mouseport.height; }
                        else { localmouse.y = (mouse.pageY < mouseport.top) ? 0 : 1; } 
                    }
                    if (mouseport.xinside && mouseport.yinside) { if (!timer.running) timer.fire(localmouse.x, localmouse.y); }
                    else if (mouseport.active) { mouseport.active = false; } 
                });
            }
            if (settings.triggerResponse) {
                viewport.element.bind("jparallax", function (event, ref) {
                    ref = stripFiletype(ref); matrixSearch(layer, ref, function (i, n) {
                        localmouse.x = layer[i].content[n].posxrat * (layer[i].diffxrat + 1) - (0.5 * layer[i].diffxrat); localmouse.y = layer[i].content[n].posyrat * (layer[i].diffyrat + 1) - (0.5 * layer[i].diffyrat); if (!settings.triggerExposesEdges) { if (localmouse.x < 0) localmouse.x = 0; if (localmouse.x > 1) localmouse.x = 1; if (localmouse.y < 0) localmouse.y = 0; if (localmouse.y > 1) localmouse.y = 1; }
                        mouseport.ontarget = false; if (!timer.running) timer.fire(localmouse.x, localmouse.y);
                    });
                });
            }
            jQuery(window).resize(function () { setupPorts(viewport, mouseport); for (var i = 0; i < layer.length; i++) { setupLayer(layer, i, mouseport); } });
        });
    }; jQuery.fn.jparallax.settings = { mouseResponse: true, mouseActiveOutside: false, triggerResponse: true, triggerExposesEdges: false, xparallax: true, yparallax: true, xorigin: 0.5, yorigin: 0.5, xtravel: 1, ytravel: 1, takeoverFactor: 0.65, takeoverThresh: 0.002, frameDuration: 25 }; initOrigin(jQuery.fn.jparallax.settings); jQuery(function () { });
})(jQuery);