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function $$(query, el) {
return [].slice.call((el || document).querySelectorAll(query))
}
function $(query, el) {
return (el || document).querySelector(query)
}
// fetchjson(url string) :Promise<Object>
//
var fetchjson = (
typeof window.fetch == 'function' ? (
function _fetchjson(url, cb) {
return window.fetch(url).then(function(r) { return r.json() })
}
) :
function _fetchjson(url, cb) {
return new Promise(function(resolve, reject) {
var r = new XMLHttpRequest()
r.addEventListener("load", function(){
try {
resolve(JSON.parse(r.responseText))
} catch (err) {
reject(err)
}
})
r.addEventListener("error", function(ev) {
reject(ev.error || ev || new Error('network error'))
})
r.open("GET", url)
r.send()
})
}
)
// timeNow() :float
//
var timeNow = (
window.performance !== undefined && window.performance.now ? function() {
return window.performance.now()
} : Date.now ? function() {
return Date.now()
} : function() {
return (new Date()).getTime()
}
)
var HUDNotification = {
el: $('#hud-notification'),
timer: null,
visible: false,
show: function(message, duration) {
var n = this
n.el.firstChild.innerText = message
n.el.classList.add('visible')
if (n.visible) {
n.hide()
setTimeout(function(){ n.show(message, duration) }, 120)
return
}
n.visible = true
n.el.style.visibility = null
clearTimeout(n.timer)
n.timer = setTimeout(function(){ n.hide() }, duration || 1200)
},
hide: function() {
var n = this
if (n.visible) {
n.el.classList.remove('visible')
n.visible = false
n.el.style.visibility = 'hidden'
}
}
}
// InterDynamicTracking takes the font size in points or pixels and returns
// the compensating tracking in EM.
//
function InterDynamicTracking(fontSize) {
var a = -0.0223, b = 0.185, c = -0.1745;
// tracking = a + b * e ^ (c * fontSize)
return a + b * Math.pow(Math.E, c * fontSize)
}
// InterDynamicLineHeight produces the line height for the given font size
//
function InterDynamicLineHeight(fontSize) {
var l = 1.4
return Math.round(fontSize * l)
}
// Mac or not? Maybe a buggy Safari or a busted Chrome on Windows...
var isMac = false
if (!window.MSStream &&
/mac|ipad|iphone|ipod/i.test(navigator.userAgent))
{
isMac = true
if (navigator.userAgent.indexOf('Safari') != -1 &&
navigator.userAgent.indexOf('Chrome') == -1)
{
document.body.classList.add('safari')
}
} else if (
navigator.userAgent.indexOf('Windows') != -1 &&
navigator.userAgent.indexOf('Chrome') != -1
) {
document.body.classList.add('chrome-win')
}
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