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/*=============================================
= Parallax Scroll Active =
=============================================*/
(function($) {
"use strict";
var ParallaxScroll = {
/* PUBLIC VARIABLES */
showLogs: false,
round: 1000,
/* PUBLIC FUNCTIONS */
init: function() {
this._log("init");
if (this._inited) {
this._log("Already Inited");
this._inited = true;
return;
}
this._requestAnimationFrame = (function() {
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function( /* function */ callback, /* DOMElement */ element) {
window.setTimeout(callback, 1000 / 60);
};
})();
this._onScroll(true);
},
/* PRIVATE VARIABLES */
_inited: false,
_properties: ['x', 'y', 'z', 'rotateX', 'rotateY', 'rotateZ', 'scaleX', 'scaleY', 'scaleZ', 'scale'],
_requestAnimationFrame: null,
/* PRIVATE FUNCTIONS */
_log: function(message) {
if (this.showLogs) console.log("Parallax Scroll / " + message);
},
_onScroll: function(noSmooth) {
var scroll = $(document).scrollTop();
var windowHeight = $(window).height();
this._log("onScroll " + scroll);
$("[data-parallax]").each($.proxy(function(index, el) {
var $el = $(el);
var properties = [];
var applyProperties = false;
var style = $el.data("style");
if (style == undefined) {
style = $el.attr("style") || "";
$el.data("style", style);
}
var datas = [$el.data("parallax")];
var iData;
for (iData = 2;; iData++) {
if ($el.data("parallax" + iData)) {
datas.push($el.data("parallax-" + iData));
} else {
break;
}
}
var datasLength = datas.length;
for (iData = 0; iData < datasLength; iData++) {
var data = datas[iData];
var scrollFrom = data["from-scroll"];
if (scrollFrom == undefined) scrollFrom = Math.max(0, $(el).offset().top - windowHeight);
scrollFrom = scrollFrom | 0;
var scrollDistance = data["distance"];
var scrollTo = data["to-scroll"];
if (scrollDistance == undefined && scrollTo == undefined) scrollDistance = windowHeight;
scrollDistance = Math.max(scrollDistance | 0, 1);
var easing = data["easing"];
var easingReturn = data["easing-return"];
if (easing == undefined || !$.easing || !$.easing[easing]) easing = null;
if (easingReturn == undefined || !$.easing || !$.easing[easingReturn]) easingReturn = easing;
if (easing) {
var totalTime = data["duration"];
if (totalTime == undefined) totalTime = scrollDistance;
totalTime = Math.max(totalTime | 0, 1);
var totalTimeReturn = data["duration-return"];
if (totalTimeReturn == undefined) totalTimeReturn = totalTime;
scrollDistance = 1;
var currentTime = $el.data("current-time");
if (currentTime == undefined) currentTime = 0;
}
if (scrollTo == undefined) scrollTo = scrollFrom + scrollDistance;
scrollTo = scrollTo | 0;
var smoothness = data["smoothness"];
if (smoothness == undefined) smoothness = 30;
smoothness = smoothness | 0;
if (noSmooth || smoothness == 0) smoothness = 1;
smoothness = smoothness | 0;
var scrollCurrent = scroll;
scrollCurrent = Math.max(scrollCurrent, scrollFrom);
scrollCurrent = Math.min(scrollCurrent, scrollTo);
if (easing) {
if ($el.data("sens") == undefined) $el.data("sens", "back");
if (scrollCurrent > scrollFrom) {
if ($el.data("sens") == "back") {
currentTime = 1;
$el.data("sens", "go");
} else {
currentTime++;
}
}
if (scrollCurrent < scrollTo) {
if ($el.data("sens") == "go") {
currentTime = 1;
$el.data("sens", "back");
} else {
currentTime++;
}
}
if (noSmooth) currentTime = totalTime;
$el.data("current-time", currentTime);
}
this._properties.map($.proxy(function(prop) {
var defaultProp = 0;
var to = data[prop];
if (to == undefined) return;
if (prop == "scale" || prop == "scaleX" || prop == "scaleY" || prop == "scaleZ") {
defaultProp = 1;
} else {
to = to | 0;
}
var prev = $el.data("_" + prop);
if (prev == undefined) prev = defaultProp;
var next = ((to - defaultProp) * ((scrollCurrent - scrollFrom) / (scrollTo - scrollFrom))) + defaultProp;
var val = prev + (next - prev) / smoothness;
if (easing && currentTime > 0 && currentTime <= totalTime) {
var from = defaultProp;
if ($el.data("sens") == "back") {
from = to;
to = -to;
easing = easingReturn;
totalTime = totalTimeReturn;
}
val = $.easing[easing](null, currentTime, from, to, totalTime);
}
val = Math.ceil(val * this.round) / this.round;
if (val == prev && next == to) val = to;
if (!properties[prop]) properties[prop] = 0;
properties[prop] += val;
if (prev != properties[prop]) {
$el.data("_" + prop, properties[prop]);
applyProperties = true;
}
}, this));
}
if (applyProperties) {
if (properties["z"] != undefined) {
var perspective = data["perspective"];
if (perspective == undefined) perspective = 800;
var $parent = $el.parent();
if (!$parent.data("style")) $parent.data("style", $parent.attr("style") || "");
$parent.attr("style", "perspective:" + perspective + "px; -webkit-perspective:" + perspective + "px; " + $parent.data("style"));
}
if (properties["scaleX"] == undefined) properties["scaleX"] = 1;
if (properties["scaleY"] == undefined) properties["scaleY"] = 1;
if (properties["scaleZ"] == undefined) properties["scaleZ"] = 1;
if (properties["scale"] != undefined) {
properties["scaleX"] *= properties["scale"];
properties["scaleY"] *= properties["scale"];
properties["scaleZ"] *= properties["scale"];
}
var translate3d = "translate3d(" + (properties["x"] ? properties["x"] : 0) + "px, " + (properties["y"] ? properties["y"] : 0) + "px, " + (properties["z"] ? properties["z"] : 0) + "px)";
var rotate3d = "rotateX(" + (properties["rotateX"] ? properties["rotateX"] : 0) + "deg) rotateY(" + (properties["rotateY"] ? properties["rotateY"] : 0) + "deg) rotateZ(" + (properties["rotateZ"] ? properties["rotateZ"] : 0) + "deg)";
var scale3d = "scaleX(" + properties["scaleX"] + ") scaleY(" + properties["scaleY"] + ") scaleZ(" + properties["scaleZ"] + ")";
var cssTransform = translate3d + " " + rotate3d + " " + scale3d + ";";
this._log(cssTransform);
$el.attr("style", "transform:" + cssTransform + " -webkit-transform:" + cssTransform + " " + style);
}
}, this));
if (window.requestAnimationFrame) {
window.requestAnimationFrame($.proxy(this._onScroll, this, false));
} else {
this._requestAnimationFrame($.proxy(this._onScroll, this, false));
}
}
};
ParallaxScroll.init();
})(jQuery);
........