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"use strict";
/**
* jQuery.browser.mobile (http://detectmobilebrowser.com/)
**/
var $ = jQuery;
(function(a) {
($.browser = $.browser || {}).mobile = /(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(a) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0, 4));
})(navigator.userAgent || navigator.vendor || window.opera);
(function(a) {
($.browser = $.browser || {}).ipad = /ipad/i.test(a);
})(navigator.userAgent || navigator.vendor || window.opera);
var mobile = $.browser.mobile;
var ipad = $.browser.ipad;
// SmoothScroll v1.2.1
// Licensed under the terms of the MIT license.
// People involved
// - Balazs Galambosi (maintainer)
// - Patrick Brunner (original idea)
// - Michael Herf (Pulse Algorithm)
// Scroll Variables (tweakable)
var defaultOptions = {
// Scrolling Core
frameRate : 60, // [Hz]
animationTime : 700, // [px]
stepSize : 30, // [px]
// Pulse (less tweakable)
// ratio of "tail" to "acceleration"
pulseAlgorithm : true,
pulseScale : 6,
pulseNormalize : 1,
// Acceleration
accelerationDelta : 20, // 20
accelerationMax : 1, // 1
// Keyboard Settings
keyboardSupport : false, // option
arrowScroll : 50, // [px]
// Other
touchpadSupport : true,
fixedBackground : false,
excluded : ""
};
var options = defaultOptions;
// Other Variables
var isExcluded = false;
var isFrame = false;
var direction = { x: 0, y: 0 };
var initDone = false;
var root = document.documentElement;
var activeElement;
var observer;
var deltaBuffer = [ 120, 120, 120 ];
var key = { left: 37, up: 38, right: 39, down: 40, spacebar: 32,
pageup: 33, pagedown: 34, end: 35, home: 36 };
/***********************************************
* SETTINGS
***********************************************/
//chrome.storage.sync.get(defaultOptions, function (syncedOptions) {
//
// options = syncedOptions;
//
// // it seems that sometimes settings come late
// // and we need to test again for excluded pages
// initTest();
//});
/***********************************************
* INITIALIZE
***********************************************/
/**
* Tests if smooth scrolling is allowed. Shuts down everything if not.
*/
function initTest() {
var disableKeyboard = false;
// disable keys for google reader (spacebar conflict)
if (document.URL.indexOf("google.com/reader/view") > -1) {
disableKeyboard = true;
}
// disable everything if the page is blacklisted
if (options.excluded) {
var domains = options.excluded.split(/[,\n] ?/);
domains.push("mail.google.com"); // exclude Gmail for now
for (var i = domains.length; i--;) {
if (document.URL.indexOf(domains[i]) > -1) {
observer && observer.disconnect();
removeEvent("mousewheel", wheel);
disableKeyboard = true;
isExcluded = true;
break;
}
}
}
// disable keyboard support if anything above requested it
if (disableKeyboard) {
removeEvent("keydown", keydown);
}
if (options.keyboardSupport && !disableKeyboard) {
addEvent("keydown", keydown);
}
}
/**
* Sets up scrolls array, determines if frames are involved.
*/
function init() {
if (!document.body) return;
var body = document.body;
var html = document.documentElement;
var windowHeight = window.innerHeight;
var scrollHeight = body.scrollHeight;
if($('body').hasClass('no-smooth-scroll'))
return;
// check compat mode for root element
root = (document.compatMode.indexOf('CSS') >= 0) ? html : body;
activeElement = body;
initTest();
initDone = true;
// Checks if this script is running in a frame
if (top != self) {
isFrame = true;
}
/**
* This fixes a bug where the areas left and right to
* the content does not trigger the onmousewheel event
* on some pages. e.g.: html, body { height: 100% }
*/
else if (scrollHeight > windowHeight &&
(body.offsetHeight <= windowHeight ||
html.offsetHeight <= windowHeight)) {
// DOMChange (throttle): fix height
var pending = false;
var refresh = function () {
if (!pending && html.scrollHeight != document.height) {
pending = true; // add a new pending action
setTimeout(function () {
html.style.height = document.height + 'px';
pending = false;
}, 500); // act rarely to stay fast
}
};
// html.style.height = 'auto';
setTimeout(refresh, 10);
var config = {
attributes: true,
childList: true,
characterData: false
};
observer = new MutationObserver(refresh);
observer.observe(body, config);
// clearfix
if (root.offsetHeight <= windowHeight) {
var underlay = document.createElement("div");
underlay.style.clear = "both";
body.appendChild(underlay);
}
}
// gmail performance fix
if (document.URL.indexOf("mail.google.com") > -1) {
var s = document.createElement("style");
s.innerHTML = ".iu { visibility: hidden }";
(document.getElementsByTagName("head")[0] || html).appendChild(s);
}
// facebook better home timeline performance
// all the HTML resized images make rendering CPU intensive
else if (document.URL.indexOf("www.facebook.com") > -1) {
var home_stream = document.getElementById("home_stream");
home_stream && (home_stream.style.webkitTransform = "translateZ(0)");
}
// disable fixed background
if (!options.fixedBackground && !isExcluded) {
body.style.backgroundAttachment = "scroll";
html.style.backgroundAttachment = "scroll";
}
}
/************************************************
* SCROLLING
************************************************/
var que = [];
var pending = false;
var lastScroll = +new Date;
/**
* Pushes scroll actions to the scrolling queue.
*/
function scrollArray(elem, left, top, delay) {
delay || (delay = 1000);
directionCheck(left, top);
if (options.accelerationMax != 1) {
var now = +new Date;
var elapsed = now - lastScroll;
if (elapsed < options.accelerationDelta) {
var factor = (1 + (30 / elapsed)) / 2;
if (factor > 1) {
factor = Math.min(factor, options.accelerationMax);
left *= factor;
top *= factor;
}
}
lastScroll = +new Date;
}
// push a scroll command
que.push({
x: left,
y: top,
lastX: (left < 0) ? 0.99 : -0.99,
lastY: (top < 0) ? 0.99 : -0.99,
start: +new Date
});
// don't act if there's a pending queue
if (pending) {
return;
}
var scrollWindow = (elem === document.body);
var step = function (time) {
var now = +new Date;
var scrollX = 0;
var scrollY = 0;
for (var i = 0; i < que.length; i++) {
var item = que[i];
var elapsed = now - item.start;
var finished = (elapsed >= options.animationTime);
// scroll position: [0, 1]
var position = (finished) ? 1 : elapsed / options.animationTime;
// easing [optional]
if (options.pulseAlgorithm) {
position = pulse(position);
}
// only need the difference
var x = (item.x * position - item.lastX) >> 0;
var y = (item.y * position - item.lastY) >> 0;
// add this to the total scrolling
scrollX += x;
scrollY += y;
// update last values
item.lastX += x;
item.lastY += y;
// delete and step back if it's over
if (finished) {
que.splice(i, 1); i--;
}
}
// scroll left and top
if (scrollWindow) {
window.scrollBy(scrollX, scrollY);
}
else {
if (scrollX) elem.scrollLeft += scrollX;
if (scrollY) elem.scrollTop += scrollY;
}
// clean up if there's nothing left to do
if (!left && !top) {
que = [];
}
if (que.length) {
requestFrame(step, elem, (delay / options.frameRate + 1));
} else {
pending = false;
}
};
// start a new queue of actions
requestFrame(step, elem, 0);
pending = true;
}
/***********************************************
* EVENTS
***********************************************/
/**
* Mouse wheel handler.
* @param {Object} event
*/
function wheel(event) {
if (!initDone) {
init();
}
var target = event.target;
var overflowing = overflowingAncestor(target);
// use default if there's no overflowing
// element or default action is prevented
if (!overflowing || event.defaultPrevented ||
isNodeName(activeElement, "embed") ||
(isNodeName(target, "embed") && /\.pdf/i.test(target.src))) {
return true;
}
var deltaX = event.wheelDeltaX || 0;
var deltaY = event.wheelDeltaY || 0;
// use wheelDelta if deltaX/Y is not available
if (!deltaX && !deltaY) {
deltaY = event.wheelDelta || 0;
}
// check if it's a touchpad scroll that should be ignored
if (!options.touchpadSupport && isTouchpad(deltaY)) {
return true;
}
// scale by step size
// delta is 120 most of the time
// synaptics seems to send 1 sometimes
if (Math.abs(deltaX) > 1.2) {
deltaX *= options.stepSize / 120;
}
if (Math.abs(deltaY) > 1.2) {
deltaY *= options.stepSize / 120;
}
scrollArray(overflowing, -deltaX, -deltaY);
event.preventDefault();
}
/**
* Keydown event handler.
* @param {Object} event
*/
function keydown(event) {
var target = event.target;
var modifier = event.ctrlKey || event.altKey || event.metaKey ||
(event.shiftKey && event.keyCode !== key.spacebar);
// do nothing if user is editing text
// or using a modifier key (except shift)
// or in a dropdown
if ( /input|textarea|select|embed/i.test(target.nodeName) ||
target.isContentEditable ||
event.defaultPrevented ||
modifier ) {
return true;
}
// spacebar should trigger button press
if (isNodeName(target, "button") &&
event.keyCode === key.spacebar) {
return true;
}
var shift, x = 0, y = 0;
var elem = overflowingAncestor(activeElement);
var clientHeight = elem.clientHeight;
if (elem == document.body) {
clientHeight = window.innerHeight;
}
switch (event.keyCode) {
case key.up:
y = -options.arrowScroll;
break;
case key.down:
y = options.arrowScroll;
break;
case key.spacebar: // (+ shift)
shift = event.shiftKey ? 1 : -1;
y = -shift * clientHeight * 0.9;
break;
case key.pageup:
y = -clientHeight * 0.9;
break;
case key.pagedown:
y = clientHeight * 0.9;
break;
case key.home:
y = -elem.scrollTop;
break;
case key.end:
var damt = elem.scrollHeight - elem.scrollTop - clientHeight;
y = (damt > 0) ? damt+10 : 0;
break;
case key.left:
x = -options.arrowScroll;
break;
case key.right:
x = options.arrowScroll;
break;
default:
return true; // a key we don't care about
}
scrollArray(elem, x, y);
event.preventDefault();
}
/**
* Mousedown event only for updating activeElement
*/
function mousedown(event) {
activeElement = event.target;
}
/***********************************************
* OVERFLOW
***********************************************/
var cache = {}; // cleared out every once in while
setInterval(function () { cache = {}; }, 10 * 1000);
var uniqueID = (function () {
var i = 0;
return function (el) {
return el.uniqueID || (el.uniqueID = i++);
};
})();
function setCache(elems, overflowing) {
for (var i = elems.length; i--;)
cache[uniqueID(elems[i])] = overflowing;
return overflowing;
}
function overflowingAncestor(el) {
var elems = [];
var rootScrollHeight = root.scrollHeight;
do {
var cached = cache[uniqueID(el)];
if (cached) {
return setCache(elems, cached);
}
elems.push(el);
if (rootScrollHeight === el.scrollHeight) {
if (!isFrame || root.clientHeight + 10 < rootScrollHeight) {
return setCache(elems, document.body); // scrolling root in WebKit
}
} else if (el.clientHeight + 10 < el.scrollHeight) {
overflow = getComputedStyle(el, "").getPropertyValue("overflow-y");
if (overflow === "scroll" || overflow === "auto") {
return setCache(elems, el);
}
}
} while (el = el.parentNode);
}
/***********************************************
* HELPERS
***********************************************/
function addEvent(type, fn, bubble) {
window.addEventListener(type, fn, (bubble||false));
}
function removeEvent(type, fn, bubble) {
window.removeEventListener(type, fn, (bubble||false));
}
function isNodeName(el, tag) {
return (el.nodeName||"").toLowerCase() === tag.toLowerCase();
}
function directionCheck(x, y) {
x = (x > 0) ? 1 : -1;
y = (y > 0) ? 1 : -1;
if (direction.x !== x || direction.y !== y) {
direction.x = x;
direction.y = y;
que = [];
lastScroll = 0;
}
}
var deltaBufferTimer;
function isTouchpad(deltaY) {
if (!deltaY) return;
deltaY = Math.abs(deltaY)
deltaBuffer.push(deltaY);
deltaBuffer.shift();
clearTimeout(deltaBufferTimer);
deltaBufferTimer = setTimeout(function () {
chrome.storage.local.set({ deltaBuffer: deltaBuffer });
}, 1000);
var allEquals = (deltaBuffer[0] == deltaBuffer[1] &&
deltaBuffer[1] == deltaBuffer[2]);
var allDivisable = (isDivisible(deltaBuffer[0], 120) &&
isDivisible(deltaBuffer[1], 120) &&
isDivisible(deltaBuffer[2], 120));
return !(allEquals || allDivisable);
}
function isDivisible(n, divisor) {
return (Math.floor(n / divisor) == n / divisor);
}
//chrome.storage.local.get('deltaBuffer', function (stored) {
// if (stored.deltaBuffer) {
// deltaBuffer = stored.deltaBuffer;
// }
//});
var requestFrame = (function () {
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
function (callback, element, delay) {
window.setTimeout(callback, delay || (1000/60));
};
})();
var MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
/***********************************************
* PULSE
***********************************************/
/**
* Viscous fluid with a pulse for part and decay for the rest.
* - Applies a fixed force over an interval (a damped acceleration), and
* - Lets the exponential bleed away the velocity over a longer interval
* - Michael Herf, http://stereopsis.com/stopping/
*/
function pulse_(x) {
var val, start, expx;
// test
x = x * options.pulseScale;
if (x < 1) { // acceleartion
val = x - (1 - Math.exp(-x));
} else { // tail
// the previous animation ended here:
start = Math.exp(-1);
// simple viscous drag
x -= 1;
expx = 1 - Math.exp(-x);
val = start + (expx * (1 - start));
}
return val * options.pulseNormalize;
}
function pulse(x) {
if (x >= 1) return 1;
if (x <= 0) return 0;
if (options.pulseNormalize == 1) {
options.pulseNormalize /= pulse_(1);
}
return pulse_(x);
}
if(!jQuery('body').hasClass('no-smooth-scroll')) {
if(!mobile && !ipad) {
addEvent("mousedown", mousedown);
addEvent("mousewheel", wheel);
addEvent("load", init);
}
}
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