FOSDEM-2025-keynote/lib/js/extra/headjs/dist/0.97a/head.js

836 lines
21 KiB
JavaScript

/**!
Head JS The only script in your <HEAD>
Copyright Tero Piirainen (tipiirai)
License MIT / http://bit.ly/mit-license
Version 0.97a
http://headjs.com
*/
; (function (win, undefined) {
"use strict";
var doc = win.document,
nav = win.navigator,
loc = win.location,
html = doc.documentElement,
klass = [],
conf = {
screens: [320, 480, 640, 768, 1024, 1280, 1440, 1680, 1920],
section: "-section",
page : "-page",
head : "head"
};
if (win.head_conf) {
for (var item in win.head_conf) {
if (win.head_conf[item] !== undefined) {
conf[item] = win.head_conf[item];
}
}
}
function pushClass(name) {
klass[klass.length] = name;
}
function removeClass(name) {
var re = new RegExp("\\b" + name + "\\b");
html.className = html.className.replace(re, '');
}
function each(arr, fn) {
for (var i = 0, l = arr.length; i < l; i++) {
fn.call(arr, arr[i], i);
}
}
// API
var api = win[conf.head] = function () {
api.ready.apply(null, arguments);
};
api.feature = function (key, enabled, queue) {
// internal: apply all classes
if (!key) {
html.className += ' ' + klass.join(' ');
klass = [];
return api;
}
if (Object.prototype.toString.call(enabled) === '[object Function]') {
enabled = enabled.call();
}
pushClass((enabled ? '' : 'no-') + key);
api[key] = !!enabled;
// apply class to HTML element
if (!queue) {
removeClass('no-' + key);
removeClass(key);
api.feature();
}
return api;
};
// no queue here, so we can remove any eventual pre-existing no-js class
api.feature("js", true);
// browser type & version
var ua = nav.userAgent.toLowerCase(),
mobile = /mobile|midp/.test(ua);
// useful for enabling/disabling feature (we can consider a desktop navigator to have more cpu/gpu power)
api.feature("mobile" , mobile , true);
api.feature("desktop", !mobile, true);
api.feature("touch" , 'ontouchstart' in win, true);
// http://www.zytrax.com/tech/web/browser_ids.htm
// http://www.zytrax.com/tech/web/mobile_ids.html
ua = /(chrome|firefox)[ \/]([\w.]+)/.exec(ua) || // Chrome & Firefox
/(iphone|ipad|ipod)(?:.*version)?[ \/]([\w.]+)/.exec(ua) || // Mobile IOS
/(android)(?:.*version)?[ \/]([\w.]+)/.exec(ua) || // Mobile Webkit
/(webkit|opera)(?:.*version)?[ \/]([\w.]+)/.exec(ua) || // Safari & Opera
/(msie) ([\w.]+)/.exec(ua) || [];
var browser = ua[1],
version = parseFloat(ua[2]),
start = 0,
stop = 0;
switch (browser) {
case 'msie':
browser = 'ie';
version = doc.documentMode || version;
start = 6;
stop = 10;
break;
// Add/remove extra tests here
case 'chrome':
start = 8;
stop = 22;
break;
case 'firefox':
browser = 'ff';
start = 3;
stop = 17;
break;
case 'ipod':
case 'ipad':
case 'iphone':
browser = 'ios';
start = 3;
stop = 6;
break;
case 'android':
start = 2;
stop = 4;
break;
case 'webkit':
browser = 'safari';
start = 9;
stop = 12;
break;
case 'opera':
start = 9;
stop = 12;
break;
}
// name can be used further on for various tasks, like font-face detection in css3.js
api.browser = {
name : browser,
version: version
};
api.browser[browser] = true;
// add supported, not supported classes
var supported = ['ie'];
//var supported = ['ie', 'chrome', 'ff', 'ios', 'android', 'safari', 'opera'];
each(supported, function (name) {
if (name === browser) {
pushClass(name);
}
else {
pushClass("no-" + name);
}
});
for (var v = start; v <= stop; v++) {
if (version < v) {
pushClass("lt-" + browser + v);
}
}
// IE lt9 specific
if (browser === "ie" && version < 9) {
// HTML5 support : you still need to add html5 css initialization styles to your site
// See: assets/html5.css
each("abbr|article|aside|audio|canvas|details|figcaption|figure|footer|header|hgroup|mark|meter|nav|output|progress|section|summary|time|video".split("|"), function (el) {
doc.createElement(el);
});
}
// CSS "router"
each(loc.pathname.split("/"), function (el, i) {
if (this.length > 2 && this[i + 1] !== undefined) {
if (i) {
pushClass(this.slice(1, i + 1).join("-").toLowerCase() + conf.section);
}
} else {
// pageId
var id = el || "index", index = id.indexOf(".");
if (index > 0) {
id = id.substring(0, index);
}
html.id = id.toLowerCase() + conf.page;
// on root?
if (!i) {
pushClass("root" + conf.section);
}
}
});
// basic screen info
api.screen = {
height: win.screen.height,
width : win.screen.width
};
// screen resolution: w-100, lt-480, lt-1024 ...
function screenSize() {
// Viewport width
var iw = win.innerWidth || html.clientWidth,
ow = win.outerWidth || win.screen.width;
api.screen['innerWidth'] = iw;
api.screen['outerWidth'] = ow;
// START old code
var w = win.outerWidth || html.clientWidth;
// remove earlier widths
html.className = html.className.replace(/ (w|lt|portrait|no-portrait|landscape|no-landscape)-\d+/g, "");
// add new ones
pushClass("w-" + Math.round(w / 100) * 100);
each(conf.screens, function (width) {
if (w <= width) {
pushClass("lt-" + width);
}
});
// END old code
// Viewport height
var ih = win.innerHeight || html.clientHeight,
oh = win.outerHeight || win.screen.height;
api.screen['innerHeight'] = ih;
api.screen['outerHeight'] = oh;
// no need for onChange event to detect this
api.feature("portrait" , (ih > iw));
api.feature("landscape", (ih < iw));
}
screenSize();
// Throttle navigators from triggering too many resize events
var resizeId = 0;
function onResize() {
win.clearTimeout(resizeId);
resizeId = win.setTimeout(screenSize, 100);
}
// Manually attach, as to not overwrite existing handler
if (win.addEventListener) {
win.addEventListener("resize", onResize, false);
} else {
win.attachEvent("onresize", onResize);
}
})(window);
/**
Head JS The only script in your <HEAD>
Copyright Tero Piirainen (tipiirai)
License MIT / http://bit.ly/mit-license
Version 0.97a
http://headjs.com
*/
;(function(win, undefined) {
"use strict";
var doc = win.document,
nav = win.navigator,
/*
To add a new test:
head.feature("video", function() {
var tag = document.createElement('video');
return !!tag.canPlayType;
});
Good place to grab more tests
https://github.com/Modernizr/Modernizr/blob/master/modernizr.js
*/
/* CSS modernizer */
el = doc.createElement("i"),
style = el.style,
prefs = ' -o- -moz- -ms- -webkit- -khtml- '.split(' '),
domPrefs = 'Webkit Moz O ms Khtml'.split(' '),
head_var = win.head_conf && win.head_conf.head || "head",
api = win[head_var];
// Thanks Paul Irish!
function testProps(props) {
for (var i in props) {
if (style[props[i]] !== undefined) {
return true;
}
}
}
function testAll(prop) {
var camel = prop.charAt(0).toUpperCase() + prop.substr(1),
props = (prop + ' ' + domPrefs.join(camel + ' ') + camel).split(' ');
return !!testProps(props);
}
var tests = {
gradient: function() {
var s1 = 'background-image:',
s2 = 'gradient(linear,left top,right bottom,from(#9f9),to(#fff));',
s3 = 'linear-gradient(left top,#eee,#fff);';
style.cssText = (s1 + prefs.join(s2 + s1) + prefs.join(s3 + s1)).slice(0,-s1.length);
return !!style.backgroundImage;
},
rgba: function() {
style.cssText = "background-color:rgba(0,0,0,0.5)";
return !!style.backgroundColor;
},
opacity: function() {
return el.style.opacity === "";
},
textshadow: function() {
return style.textShadow === '';
},
multiplebgs: function() {
style.cssText = "background:url(//:),url(//:),red url(//:)";
return new RegExp("(url\\s*\\(.*?){3}").test(style.background);
},
boxshadow: function() {
return testAll("boxShadow");
},
borderimage: function() {
return testAll("borderImage");
},
borderradius: function() {
return testAll("borderRadius");
},
cssreflections: function() {
return testAll("boxReflect");
},
csstransforms: function() {
return testAll("transform");
},
csstransitions: function() {
return testAll("transition");
},
/*
font-face support. Uses browser sniffing but is synchronous.
http://paulirish.com/2009/font-face-feature-detection/
*/
fontface: function() {
var ua = navigator.userAgent, parsed;
if (/*@cc_on@if(@_jscript_version>=5)!@end@*/0) {
return true;
}
if (parsed = ua.match(/Chrome\/(\d+\.\d+\.\d+\.\d+)/)) {
return parsed[1] >= '4.0.249.4' || 1 * parsed[1].split(".")[0] > 5;
}
if ((parsed = ua.match(/Safari\/(\d+\.\d+)/)) && !/iPhone/.test(ua)) {
return parsed[1] >= '525.13';
}
if (/Opera/.test({}.toString.call(window.opera))) {
return opera.version() >= '10.00';
}
if (parsed = ua.match(/rv:(\d+\.\d+\.\d+)[^b].*Gecko\//)) {
return parsed[1] >= '1.9.1';
}
return false;
}
};
// queue features
for (var key in tests) {
if (tests[key]) {
api.feature(key, tests[key].call(), true);
}
}
// enable features at once
api.feature();
})(window);
/**
Head JS The only script in your <HEAD>
Copyright Tero Piirainen (tipiirai)
License MIT / http://bit.ly/mit-license
Version 0.97a
http://headjs.com
*/
;(function(win, undefined) {
"use strict";
var doc = win.document,
nav = win.navigator,
head = doc.documentElement,
isHeadReady,
isDomReady,
domWaiters = [],
queue = [], // waiters for the "head ready" event
handlers = {}, // user functions waiting for events
scripts = {}, // loadable scripts in different states
isAsync = doc.createElement("script").async === true || "MozAppearance" in doc.documentElement.style || win.opera,
/*** public API ***/
head_var = win.head_conf && win.head_conf.head || "head",
api = win[head_var] = (win[head_var] || function() { api.ready.apply(null, arguments); }),
// states
PRELOADED = 1,
PRELOADING = 2,
LOADING = 3,
LOADED = 4;
// Method 1: simply load and let browser take care of ordering
if (isAsync) {
api.js = function() {
var args = arguments,
fn = args[args.length -1],
els = {};
if (!isFunc(fn)) {
fn = null;
}
each(args, function(el, i) {
if (el != fn) {
el = getScript(el);
els[el.name] = el;
load(el, fn && i == args.length -2 ? function() {
if (allLoaded(els)) {
one(fn);
}
} : null);
}
});
return api;
};
// Method 2: preload with text/cache hack
} else {
api.js = function() {
var args = arguments,
rest = [].slice.call(args, 1),
next = rest[0];
// wait for a while. immediate execution causes some browsers to ignore caching
if (!isHeadReady) {
queue.push(function() {
api.js.apply(null, args);
});
return api;
}
// multiple arguments
if (next) {
// load
each(rest, function(el) {
if (!isFunc(el)) {
preload(getScript(el));
}
});
// execute
load(getScript(args[0]), isFunc(next) ? next : function() {
api.js.apply(null, rest);
});
// single script
} else {
load(getScript(args[0]));
}
return api;
};
}
api.ready = function(key, fn) {
// DOM ready check: head.ready(document, function() { });
if (key == doc) {
if (isDomReady) {
one(fn);
}
else {
domWaiters.push(fn);
}
return api;
}
// shift arguments
if (isFunc(key)) {
fn = key;
key = "ALL";
}
// make sure arguments are sane
if (typeof key != 'string' || !isFunc(fn)) {
return api;
}
var script = scripts[key];
// script already loaded --> execute and return
if (script && script.state == LOADED || key == 'ALL' && allLoaded() && isDomReady) {
one(fn);
return api;
}
var arr = handlers[key];
if (!arr) {
arr = handlers[key] = [fn];
}
else {
arr.push(fn);
}
return api;
};
// perform this when DOM is ready
api.ready(doc, function() {
if (allLoaded()) {
each(handlers.ALL, function(fn) {
one(fn);
});
}
if (api.feature) {
api.feature("domloaded", true);
}
});
/*** private functions ***/
// call function once
function one(fn) {
if (fn._done) { return; }
fn();
fn._done = 1;
}
function toLabel(url) {
var els = url.split("/"),
name = els[els.length -1],
i = name.indexOf("?");
return i != -1 ? name.substring(0, i) : name;
}
function getScript(url) {
var script;
if (typeof url == 'object') {
for (var key in url) {
if (url[key]) {
script = { name: key, url: url[key] };
}
}
} else {
script = { name: toLabel(url), url: url };
}
var existing = scripts[script.name];
if (existing && existing.url === script.url) {
return existing;
}
scripts[script.name] = script;
return script;
}
function each(arr, fn) {
if (!arr) { return; }
// arguments special type
if (typeof arr == 'object') { arr = [].slice.call(arr); }
// do the job
for (var i = 0; i < arr.length; i++) {
fn.call(arr, arr[i], i);
}
}
function isFunc(el) {
return Object.prototype.toString.call(el) == '[object Function]';
}
function allLoaded(els) {
els = els || scripts;
var loaded;
for (var name in els) {
if (els.hasOwnProperty(name) && els[name].state != LOADED) {
return false;
}
loaded = true;
}
return loaded;
}
function onPreload(script) {
script.state = PRELOADED;
each(script.onpreload, function(el) {
el.call();
});
}
function preload(script, callback) {
if (script.state === undefined) {
script.state = PRELOADING;
script.onpreload = [];
scriptTag({ src: script.url, type: 'cache'}, function() {
onPreload(script);
});
}
}
function load(script, callback) {
if (script.state == LOADED) {
return callback && callback();
}
if (script.state == LOADING) {
return api.ready(script.name, callback);
}
if (script.state == PRELOADING) {
return script.onpreload.push(function() {
load(script, callback);
});
}
script.state = LOADING;
scriptTag(script.url, function() {
script.state = LOADED;
if (callback) { callback(); }
// handlers for this script
each(handlers[script.name], function(fn) {
one(fn);
});
// everything ready
if (allLoaded() && isDomReady) {
each(handlers.ALL, function(fn) {
one(fn);
});
}
});
}
function scriptTag(src, callback) {
var s = doc.createElement('script');
s.type = 'text/' + (src.type || 'javascript');
s.src = src.src || src;
s.async = false;
s.onreadystatechange = s.onload = function() {
var state = s.readyState;
if (!callback.done && (!state || /loaded|complete/.test(state))) {
callback.done = true;
callback();
}
};
// use body if available. more safe in IE
(doc.body || head).appendChild(s);
}
/*
The much desired DOM ready check
Thanks to jQuery and http://javascript.nwbox.com/IEContentLoaded/
*/
function fireReady() {
if (!isDomReady) {
isDomReady = true;
each(domWaiters, function(fn) {
one(fn);
});
}
}
// W3C
if (win.addEventListener) {
doc.addEventListener("DOMContentLoaded", fireReady, false);
// fallback. this is always called
win.addEventListener("load", fireReady, false);
// IE
} else if (win.attachEvent) {
// for iframes
doc.attachEvent("onreadystatechange", function() {
if (doc.readyState === "complete" ) {
fireReady();
}
});
// avoid frames with different domains issue
var frameElement = 1;
try {
frameElement = win.frameElement;
} catch(e) {}
if (!frameElement && head.doScroll) {
(function() {
try {
head.doScroll("left");
fireReady();
} catch(e) {
setTimeout(arguments.callee, 1);
return;
}
})();
}
// fallback
win.attachEvent("onload", fireReady);
}
// enable document.readyState for Firefox <= 3.5
if (!doc.readyState && doc.addEventListener) {
doc.readyState = "loading";
doc.addEventListener("DOMContentLoaded", handler = function () {
doc.removeEventListener("DOMContentLoaded", handler, false);
doc.readyState = "complete";
}, false);
}
/*
We wait for 300 ms before script loading starts. for some reason this is needed
to make sure scripts are cached. Not sure why this happens yet. A case study:
https://github.com/headjs/headjs/issues/closed#issue/83
*/
setTimeout(function() {
isHeadReady = true;
each(queue, function(fn) {
fn();
});
}, 300);
})(window);