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Added API function to restart SmoothScroll after it was destroyed #40

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Added API function to restart SmoothScroll after it was destroyed #40

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62 changes: 37 additions & 25 deletions SmoothScroll.js
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,14 @@ var observer;
var refreshSize;
var deltaBuffer = [];
var isMac = /^Mac/.test(navigator.platform);
var userAgent = window.navigator.userAgent;
var isEdge = /Edge/.test(userAgent); // thank you MS
var isChrome = /chrome/i.test(userAgent) && !isEdge;
var isSafari = /safari/i.test(userAgent) && !isEdge;
var isMobile = /mobile/i.test(userAgent);
var isIEWin7 = /Windows NT 6.1/i.test(userAgent) && /rv:11/i.test(userAgent);
var isEnabledForBrowser = (isChrome || isSafari || isIEWin7) && !isMobile;
var wheelEvent;

var key = { left: 37, up: 38, right: 39, down: 40, spacebar: 32,
pageup: 33, pagedown: 34, end: 35, home: 36 };
Expand Down Expand Up @@ -161,6 +169,22 @@ function init() {
}
}

/**
* Attaches event listeners
*/
function start() {
if ('onwheel' in document.createElement('div'))
wheelEvent = 'wheel';
else if ('onmousewheel' in document.createElement('div'))
wheelEvent = 'mousewheel';

if (wheelEvent && isEnabledForBrowser) {
addEvent(wheelEvent, wheel);
addEvent('mousedown', mousedown);
addEvent('load', init);
}
}

/**
* Removes event listeners and other traces left on the page.
*/
Expand Down Expand Up @@ -678,31 +702,6 @@ function pulse(x) {
}


/***********************************************
* FIRST RUN
***********************************************/

var userAgent = window.navigator.userAgent;
var isEdge = /Edge/.test(userAgent); // thank you MS
var isChrome = /chrome/i.test(userAgent) && !isEdge;
var isSafari = /safari/i.test(userAgent) && !isEdge;
var isMobile = /mobile/i.test(userAgent);
var isIEWin7 = /Windows NT 6.1/i.test(userAgent) && /rv:11/i.test(userAgent);
var isEnabledForBrowser = (isChrome || isSafari || isIEWin7) && !isMobile;

var wheelEvent;
if ('onwheel' in document.createElement('div'))
wheelEvent = 'wheel';
else if ('onmousewheel' in document.createElement('div'))
wheelEvent = 'mousewheel';

if (wheelEvent && isEnabledForBrowser) {
addEvent(wheelEvent, wheel);
addEvent('mousedown', mousedown);
addEvent('load', init);
}


/***********************************************
* PUBLIC INTERFACE
***********************************************/
Expand All @@ -713,10 +712,23 @@ function SmoothScroll(optionsToSet) {
options[key] = optionsToSet[key];
}
SmoothScroll.destroy = cleanup;
SmoothScroll.start = start;


/***********************************************
* FIRST RUN
***********************************************/

SmoothScroll.start();

if (window.SmoothScrollOptions) // async API
SmoothScroll(window.SmoothScrollOptions);


/***********************************************
* DEPENDENCY MANAGEMENT EXPORT
***********************************************/

if (typeof define === 'function' && define.amd)
define(function() {
return SmoothScroll;
Expand Down