CORE_V5 // lib

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Editing: jRespond.js

/*! jRespond.js v 0.9 | Author: Jeremy Fields [jeremy.fields@viget.com], 2013 | License: MIT */
/*! viewportSize | Author: Tyson Matanich, 2013 | License: MIT */

(function(win,doc,undefined) {

'use strict';

win.jRespond = function(breakpoints) {

// array for registered functions
		var mediaListeners = [];

// array that corresponds to mediaListeners and holds the current on/off state
		var mediaInit = [];

// array of media query breakpoints; adjust as needed
		var mediaBreakpoints = breakpoints;

// store the current breakpoint
		var curr = '';

// window resize event timer stuff
		var resizeTimer;
		var resizeW = 0;
		var resizeTmrFast = 100;
		var resizeTmrSlow = 500;
		var resizeTmrSpd = resizeTmrSlow;

// send media to the mediaListeners array
		var addFunction = function(elm) {

var brkpt = elm['breakpoint'];
			var entr = elm['enter'] || undefined;

// add function to stack
			mediaListeners.push(elm);

// add corresponding entry to mediaInit
			mediaInit.push(false);

if (testForCurr(brkpt)) {
				if (entr !== undefined) {
					entr.call();
				}
				mediaInit[(mediaListeners.length - 1)] = true;
			}
		};

// loops through all registered functions and determines what should be fired
		var cycleThrough = function() {
			
			var enterArray = [];
			var exitArray = [];

for (var i = 0; i < mediaListeners.length; i++) {
				var brkpt = mediaListeners[i]['breakpoint'];
				var entr = mediaListeners[i]['enter'] || undefined;
				var exit = mediaListeners[i]['exit'] || undefined;

if (brkpt === '*') {
					if (entr !== undefined) {
						enterArray.push(entr);
					}
					if (exit !== undefined) {
						exitArray.push(exit);
					}
				} else if (testForCurr(brkpt)) {
					if (entr !== undefined && !mediaInit[i]) {
						enterArray.push(entr);
					}
					mediaInit[i] = true;
				} else {
					if (exit !== undefined && mediaInit[i]) {
						exitArray.push(exit);
					}
					mediaInit[i] = false;
				}
			}

// loop through exit functions to call
			for (var j = 0; j < exitArray.length; j++) {
				exitArray[j].call();
			}

// then loop through enter functions to call
			for (var k = 0; k < enterArray.length; k++) {
				enterArray[k].call();
			}
		};

// checks for the correct breakpoint against the mediaBreakpoints list
		var returnBreakpoint = function(width) {
			
			var foundBrkpt = false;

// look for existing breakpoint based on width
			for (var i = 0; i < mediaBreakpoints.length; i++) {

// if registered breakpoint found, break out of loop
				if (width >= mediaBreakpoints[i]['enter'] && width <= mediaBreakpoints[i]['exit']) {
					foundBrkpt = true;

break;
				}
			}

// if breakpoint is found and it's not the current one
			if (foundBrkpt && curr !== mediaBreakpoints[i]['label']) {
				curr = mediaBreakpoints[i]['label'];

// run the loop
				cycleThrough();

// or if no breakpoint applies
			} else if (!foundBrkpt && curr !== '') {
				curr = '';

// run the loop
				cycleThrough();
			}

};

// takes the breakpoint/s arguement from an object and tests it against the current state
		var testForCurr = function(elm) {

// if there's an array of breakpoints
			if (typeof elm === 'object') {
				if (elm.join().indexOf(curr) >= 0) {
					return true;
				}

// if the string is '*' then run at every breakpoint
			} else if (elm === '*') {
				return true;

// or if it's a single breakpoint
			} else if (typeof elm === 'string') {
				if (curr === elm) {
					return true;
				}
			}
		};

// self-calling function that checks the browser width and delegates if it detects a change
		var checkResize = function() {

// get current width
			var w = viewportSize.getWidth();

// if there is a change speed up the timer and fire the returnBreakpoint function
			if (w !== resizeW) {
				resizeTmrSpd = resizeTmrFast;

returnBreakpoint(w);

// otherwise keep on keepin' on
			} else {
				resizeTmrSpd = resizeTmrSlow;
			}

resizeW = w;

// calls itself on a setTimeout
			setTimeout(checkResize, resizeTmrSpd);
		};
		checkResize();

// return
		return {
			addFunc: function(elm) { addFunction(elm); },
			getBreakpoint: function() { return curr; }
		};

};

}(this,this.document));

/*! viewportSize | Author: Tyson Matanich, 2013 | License: MIT */
(function(n){n.viewportSize={},n.viewportSize.getHeight=function(){return t("Height")},n.viewportSize.getWidth=function(){return t("Width")};var t=function(t){var f,o=t.toLowerCase(),e=n.document,i=e.documentElement,r,u;return n["inner"+t]===undefined?f=i["client"+t]:n["inner"+t]!=i["client"+t]?(r=e.createElement("body"),r.id="vpw-test-b",r.style.cssText="overflow:scroll",u=e.createElement("div"),u.id="vpw-test-d",u.style.cssText="position:absolute;top:-1000px",u.innerHTML="<style>@media("+o+":"+i["client"+t]+"px){body#vpw-test-b div#vpw-test-d{"+o+":7px!important}}<\/style>",r.appendChild(u),i.insertBefore(r,e.head),f=u["offset"+t]==7?i["client"+t]:n["inner"+t],i.removeChild(r)):f=n["inner"+t],f}})(this);

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