mirror of
https://github.com/github/choosealicense.com
synced 2024-11-05 19:28:50 +01:00
561 lines
18 KiB
JavaScript
561 lines
18 KiB
JavaScript
/*
|
|
selectivizr v1.0.2b - (c) Keith Clark, freely distributable under the terms
|
|
of the MIT license.
|
|
|
|
selectivizr.com
|
|
*/
|
|
/*
|
|
|
|
Notes about this source
|
|
-----------------------
|
|
|
|
* The #DEBUG_START and #DEBUG_END comments are used to mark blocks of code
|
|
that will be removed prior to building a final release version (using a
|
|
pre-compression script)
|
|
|
|
|
|
References:
|
|
-----------
|
|
|
|
* CSS Syntax : http://www.w3.org/TR/2003/WD-css3-syntax-20030813/#style
|
|
* Selectors : http://www.w3.org/TR/css3-selectors/#selectors
|
|
* IE Compatability : http://msdn.microsoft.com/en-us/library/cc351024(VS.85).aspx
|
|
* W3C Selector Tests : http://www.w3.org/Style/CSS/Test/CSS3/Selectors/current/html/tests/
|
|
|
|
*/
|
|
|
|
(function(win) {
|
|
|
|
// If browser isn't IE, then stop execution! This handles the script
|
|
// being loaded by non IE browsers because the developer didn't use
|
|
// conditional comments.
|
|
if (/*@cc_on!@*/true) return;
|
|
|
|
// =========================== Init Objects ============================
|
|
|
|
var doc = document;
|
|
var root = doc.documentElement;
|
|
var xhr = getXHRObject();
|
|
var ieVersion = /MSIE (\d+)/.exec(navigator.userAgent)[1];
|
|
|
|
// If were not in standards mode, IE is too old / new or we can't create
|
|
// an XMLHttpRequest object then we should get out now.
|
|
if (doc.compatMode != 'CSS1Compat' || ieVersion<6 || ieVersion>8 || !xhr) {
|
|
return;
|
|
}
|
|
|
|
|
|
// ========================= Common Objects ============================
|
|
|
|
// Compatiable selector engines in order of CSS3 support. Note: '*' is
|
|
// a placholder for the object key name. (basically, crude compression)
|
|
var selectorEngines = {
|
|
"NW" : "*.Dom.select",
|
|
"MooTools" : "$$",
|
|
"DOMAssistant" : "*.$",
|
|
"Prototype" : "$$",
|
|
"YAHOO" : "*.util.Selector.query",
|
|
"Sizzle" : "*",
|
|
"jQuery" : "*",
|
|
"dojo" : "*.query"
|
|
};
|
|
|
|
var selectorMethod;
|
|
var enabledWatchers = []; // array of :enabled/:disabled elements to poll
|
|
var ie6PatchID = 0; // used to solve ie6's multiple class bug
|
|
var patchIE6MultipleClasses = true; // if true adds class bloat to ie6
|
|
var namespace = "slvzr";
|
|
|
|
// Stylesheet parsing regexp's
|
|
var RE_COMMENT = /(\/\*[^*]*\*+([^\/][^*]*\*+)*\/)\s*/g;
|
|
var RE_IMPORT = /@import\s*(?:(?:(?:url\(\s*(['"]?)(.*)\1)\s*\))|(?:(['"])(.*)\3))[^;]*;/g;
|
|
var RE_ASSET_URL = /\burl\(\s*(["']?)(?!data:)([^"')]+)\1\s*\)/g;
|
|
var RE_PSEUDO_STRUCTURAL = /^:(empty|(first|last|only|nth(-last)?)-(child|of-type))$/;
|
|
var RE_PSEUDO_ELEMENTS = /:(:first-(?:line|letter))/g;
|
|
var RE_SELECTOR_GROUP = /(^|})\s*([^\{]*?[\[:][^{]+)/g;
|
|
var RE_SELECTOR_PARSE = /([ +~>])|(:[a-z-]+(?:\(.*?\)+)?)|(\[.*?\])/g;
|
|
var RE_LIBRARY_INCOMPATIBLE_PSEUDOS = /(:not\()?:(hover|enabled|disabled|focus|checked|target|active|visited|first-line|first-letter)\)?/g;
|
|
var RE_PATCH_CLASS_NAME_REPLACE = /[^\w-]/g;
|
|
|
|
// HTML UI element regexp's
|
|
var RE_INPUT_ELEMENTS = /^(INPUT|SELECT|TEXTAREA|BUTTON)$/;
|
|
var RE_INPUT_CHECKABLE_TYPES = /^(checkbox|radio)$/;
|
|
|
|
// Broken attribute selector implementations (IE7/8 native [^=""], [$=""] and [*=""])
|
|
var BROKEN_ATTR_IMPLEMENTATIONS = ieVersion>6 ? /[\$\^*]=(['"])\1/ : null;
|
|
|
|
// Whitespace normalization regexp's
|
|
var RE_TIDY_TRAILING_WHITESPACE = /([(\[+~])\s+/g;
|
|
var RE_TIDY_LEADING_WHITESPACE = /\s+([)\]+~])/g;
|
|
var RE_TIDY_CONSECUTIVE_WHITESPACE = /\s+/g;
|
|
var RE_TIDY_TRIM_WHITESPACE = /^\s*((?:[\S\s]*\S)?)\s*$/;
|
|
|
|
// String constants
|
|
var EMPTY_STRING = "";
|
|
var SPACE_STRING = " ";
|
|
var PLACEHOLDER_STRING = "$1";
|
|
|
|
// =========================== Patching ================================
|
|
|
|
// --[ patchStyleSheet() ]----------------------------------------------
|
|
// Scans the passed cssText for selectors that require emulation and
|
|
// creates one or more patches for each matched selector.
|
|
function patchStyleSheet( cssText ) {
|
|
return cssText.replace(RE_PSEUDO_ELEMENTS, PLACEHOLDER_STRING).
|
|
replace(RE_SELECTOR_GROUP, function(m, prefix, selectorText) {
|
|
var selectorGroups = selectorText.split(",");
|
|
for (var c = 0, cs = selectorGroups.length; c < cs; c++) {
|
|
var selector = normalizeSelectorWhitespace(selectorGroups[c]) + SPACE_STRING;
|
|
var patches = [];
|
|
selectorGroups[c] = selector.replace(RE_SELECTOR_PARSE,
|
|
function(match, combinator, pseudo, attribute, index) {
|
|
if (combinator) {
|
|
if (patches.length>0) {
|
|
applyPatches( selector.substring(0, index), patches );
|
|
patches = [];
|
|
}
|
|
return combinator;
|
|
}
|
|
else {
|
|
var patch = (pseudo) ? patchPseudoClass( pseudo ) : patchAttribute( attribute );
|
|
if (patch) {
|
|
patches.push(patch);
|
|
return "." + patch.className;
|
|
}
|
|
return match;
|
|
}
|
|
}
|
|
);
|
|
}
|
|
return prefix + selectorGroups.join(",");
|
|
});
|
|
};
|
|
|
|
// --[ patchAttribute() ]-----------------------------------------------
|
|
// returns a patch for an attribute selector.
|
|
function patchAttribute( attr ) {
|
|
return (!BROKEN_ATTR_IMPLEMENTATIONS || BROKEN_ATTR_IMPLEMENTATIONS.test(attr)) ?
|
|
{ className: createClassName(attr), applyClass: true } : null;
|
|
};
|
|
|
|
// --[ patchPseudoClass() ]---------------------------------------------
|
|
// returns a patch for a pseudo-class
|
|
function patchPseudoClass( pseudo ) {
|
|
|
|
var applyClass = true;
|
|
var className = createClassName(pseudo.slice(1));
|
|
var isNegated = pseudo.substring(0, 5) == ":not(";
|
|
var activateEventName;
|
|
var deactivateEventName;
|
|
|
|
// if negated, remove :not()
|
|
if (isNegated) {
|
|
pseudo = pseudo.slice(5, -1);
|
|
}
|
|
|
|
// bracket contents are irrelevant - remove them
|
|
var bracketIndex = pseudo.indexOf("(")
|
|
if (bracketIndex > -1) {
|
|
pseudo = pseudo.substring(0, bracketIndex);
|
|
}
|
|
|
|
// check we're still dealing with a pseudo-class
|
|
if (pseudo.charAt(0) == ":") {
|
|
switch (pseudo.slice(1)) {
|
|
|
|
case "root":
|
|
applyClass = function(e) {
|
|
return isNegated ? e != root : e == root;
|
|
}
|
|
break;
|
|
|
|
case "target":
|
|
// :target is only supported in IE8
|
|
if (ieVersion == 8) {
|
|
applyClass = function(e) {
|
|
var handler = function() {
|
|
var hash = location.hash;
|
|
var hashID = hash.slice(1);
|
|
return isNegated ? (hash == EMPTY_STRING || e.id != hashID) : (hash != EMPTY_STRING && e.id == hashID);
|
|
};
|
|
addEvent( win, "hashchange", function() {
|
|
toggleElementClass(e, className, handler());
|
|
})
|
|
return handler();
|
|
}
|
|
break;
|
|
}
|
|
return false;
|
|
|
|
case "checked":
|
|
applyClass = function(e) {
|
|
if (RE_INPUT_CHECKABLE_TYPES.test(e.type)) {
|
|
addEvent( e, "propertychange", function() {
|
|
if (event.propertyName == "checked") {
|
|
toggleElementClass( e, className, e.checked !== isNegated );
|
|
}
|
|
})
|
|
}
|
|
return e.checked !== isNegated;
|
|
}
|
|
break;
|
|
|
|
case "disabled":
|
|
isNegated = !isNegated;
|
|
|
|
case "enabled":
|
|
applyClass = function(e) {
|
|
if (RE_INPUT_ELEMENTS.test(e.tagName)) {
|
|
addEvent( e, "propertychange", function() {
|
|
if (event.propertyName == "$disabled") {
|
|
toggleElementClass( e, className, e.$disabled === isNegated );
|
|
}
|
|
});
|
|
enabledWatchers.push(e);
|
|
e.$disabled = e.disabled;
|
|
return e.disabled === isNegated;
|
|
}
|
|
return pseudo == ":enabled" ? isNegated : !isNegated;
|
|
}
|
|
break;
|
|
|
|
case "focus":
|
|
activateEventName = "focus";
|
|
deactivateEventName = "blur";
|
|
|
|
case "hover":
|
|
if (!activateEventName) {
|
|
activateEventName = "mouseenter";
|
|
deactivateEventName = "mouseleave";
|
|
}
|
|
applyClass = function(e) {
|
|
addEvent( e, isNegated ? deactivateEventName : activateEventName, function() {
|
|
toggleElementClass( e, className, true );
|
|
})
|
|
addEvent( e, isNegated ? activateEventName : deactivateEventName, function() {
|
|
toggleElementClass( e, className, false );
|
|
})
|
|
return isNegated;
|
|
}
|
|
break;
|
|
|
|
// everything else
|
|
default:
|
|
// If we don't support this pseudo-class don't create
|
|
// a patch for it
|
|
if (!RE_PSEUDO_STRUCTURAL.test(pseudo)) {
|
|
return false;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
return { className: className, applyClass: applyClass };
|
|
};
|
|
|
|
// --[ applyPatches() ]-------------------------------------------------
|
|
// uses the passed selector text to find DOM nodes and patch them
|
|
function applyPatches(selectorText, patches) {
|
|
var elms;
|
|
|
|
// Although some selector libraries can find :checked :enabled etc.
|
|
// we need to find all elements that could have that state because
|
|
// it can be changed by the user.
|
|
var domSelectorText = selectorText.replace(RE_LIBRARY_INCOMPATIBLE_PSEUDOS, EMPTY_STRING);
|
|
|
|
// If the dom selector equates to an empty string or ends with
|
|
// whitespace then we need to append a universal selector (*) to it.
|
|
if (domSelectorText == EMPTY_STRING || domSelectorText.charAt(domSelectorText.length - 1) == SPACE_STRING) {
|
|
domSelectorText += "*";
|
|
}
|
|
|
|
// Ensure we catch errors from the selector library
|
|
try {
|
|
elms = selectorMethod( domSelectorText );
|
|
} catch (ex) {
|
|
// #DEBUG_START
|
|
log( "Selector '" + selectorText + "' threw exception '" + ex + "'" );
|
|
// #DEBUG_END
|
|
}
|
|
|
|
|
|
if (elms) {
|
|
for (var d = 0, dl = elms.length; d < dl; d++) {
|
|
var elm = elms[d];
|
|
var cssClasses = elm.className;
|
|
for (var f = 0, fl = patches.length; f < fl; f++) {
|
|
var patch = patches[f];
|
|
|
|
if (!hasPatch(elm, patch)) {
|
|
if (patch.applyClass && (patch.applyClass === true || patch.applyClass(elm) === true)) {
|
|
cssClasses = toggleClass(cssClasses, patch.className, true );
|
|
}
|
|
}
|
|
}
|
|
elm.className = cssClasses;
|
|
}
|
|
}
|
|
};
|
|
|
|
// --[ hasPatch() ]-----------------------------------------------------
|
|
// checks for the exsistence of a patch on an element
|
|
function hasPatch( elm, patch ) {
|
|
return new RegExp("(^|\\s)" + patch.className + "(\\s|$)").test(elm.className);
|
|
};
|
|
|
|
|
|
// =========================== Utility =================================
|
|
|
|
function createClassName( className ) {
|
|
return namespace + "-" + ((ieVersion == 6 && patchIE6MultipleClasses) ?
|
|
ie6PatchID++
|
|
:
|
|
className.replace(RE_PATCH_CLASS_NAME_REPLACE, function(a) { return a.charCodeAt(0) }));
|
|
};
|
|
|
|
// --[ log() ]----------------------------------------------------------
|
|
// #DEBUG_START
|
|
function log( message ) {
|
|
if (win.console) {
|
|
win.console.log(message);
|
|
}
|
|
};
|
|
// #DEBUG_END
|
|
|
|
// --[ trim() ]---------------------------------------------------------
|
|
// removes leading, trailing whitespace from a string
|
|
function trim( text ) {
|
|
return text.replace(RE_TIDY_TRIM_WHITESPACE, PLACEHOLDER_STRING);
|
|
};
|
|
|
|
// --[ normalizeWhitespace() ]------------------------------------------
|
|
// removes leading, trailing and consecutive whitespace from a string
|
|
function normalizeWhitespace( text ) {
|
|
return trim(text).replace(RE_TIDY_CONSECUTIVE_WHITESPACE, SPACE_STRING);
|
|
};
|
|
|
|
// --[ normalizeSelectorWhitespace() ]----------------------------------
|
|
// tidies whitespace around selector brackets and combinators
|
|
function normalizeSelectorWhitespace( selectorText ) {
|
|
return normalizeWhitespace(selectorText.
|
|
replace(RE_TIDY_TRAILING_WHITESPACE, PLACEHOLDER_STRING).
|
|
replace(RE_TIDY_LEADING_WHITESPACE, PLACEHOLDER_STRING)
|
|
);
|
|
};
|
|
|
|
// --[ toggleElementClass() ]-------------------------------------------
|
|
// toggles a single className on an element
|
|
function toggleElementClass( elm, className, on ) {
|
|
var oldClassName = elm.className;
|
|
var newClassName = toggleClass(oldClassName, className, on);
|
|
if (newClassName != oldClassName) {
|
|
elm.className = newClassName;
|
|
elm.parentNode.className += EMPTY_STRING;
|
|
}
|
|
};
|
|
|
|
// --[ toggleClass() ]--------------------------------------------------
|
|
// adds / removes a className from a string of classNames. Used to
|
|
// manage multiple class changes without forcing a DOM redraw
|
|
function toggleClass( classList, className, on ) {
|
|
var re = RegExp("(^|\\s)" + className + "(\\s|$)");
|
|
var classExists = re.test(classList);
|
|
if (on) {
|
|
return classExists ? classList : classList + SPACE_STRING + className;
|
|
} else {
|
|
return classExists ? trim(classList.replace(re, PLACEHOLDER_STRING)) : classList;
|
|
}
|
|
};
|
|
|
|
// --[ addEvent() ]-----------------------------------------------------
|
|
function addEvent(elm, eventName, eventHandler) {
|
|
elm.attachEvent("on" + eventName, eventHandler);
|
|
};
|
|
|
|
// --[ getXHRObject() ]-------------------------------------------------
|
|
function getXHRObject()
|
|
{
|
|
if (win.XMLHttpRequest) {
|
|
return new XMLHttpRequest;
|
|
}
|
|
try {
|
|
return new ActiveXObject('Microsoft.XMLHTTP');
|
|
} catch(e) {
|
|
return null;
|
|
}
|
|
};
|
|
|
|
// --[ loadStyleSheet() ]-----------------------------------------------
|
|
function loadStyleSheet( url ) {
|
|
xhr.open("GET", url, false);
|
|
xhr.send();
|
|
return (xhr.status==200) ? xhr.responseText : EMPTY_STRING;
|
|
};
|
|
|
|
// --[ resolveUrl() ]---------------------------------------------------
|
|
// Converts a URL fragment to a fully qualified URL using the specified
|
|
// context URL. Returns null if same-origin policy is broken
|
|
function resolveUrl( url, contextUrl ) {
|
|
|
|
function getProtocolAndHost( url ) {
|
|
return url.substring(0, url.indexOf("/", 8));
|
|
};
|
|
|
|
// absolute path
|
|
if (/^https?:\/\//i.test(url)) {
|
|
return getProtocolAndHost(contextUrl) == getProtocolAndHost(url) ? url : null;
|
|
}
|
|
|
|
// root-relative path
|
|
if (url.charAt(0)=="/") {
|
|
return getProtocolAndHost(contextUrl) + url;
|
|
}
|
|
|
|
// relative path
|
|
var contextUrlPath = contextUrl.split(/[?#]/)[0]; // ignore query string in the contextUrl
|
|
if (url.charAt(0) != "?" && contextUrlPath.charAt(contextUrlPath.length - 1) != "/") {
|
|
contextUrlPath = contextUrlPath.substring(0, contextUrlPath.lastIndexOf("/") + 1);
|
|
}
|
|
|
|
return contextUrlPath + url;
|
|
};
|
|
|
|
// --[ parseStyleSheet() ]----------------------------------------------
|
|
// Downloads the stylesheet specified by the URL, removes it's comments
|
|
// and recursivly replaces @import rules with their contents, ultimately
|
|
// returning the full cssText.
|
|
function parseStyleSheet( url ) {
|
|
if (url) {
|
|
return loadStyleSheet(url).replace(RE_COMMENT, EMPTY_STRING).
|
|
replace(RE_IMPORT, function( match, quoteChar, importUrl, quoteChar2, importUrl2 ) {
|
|
return parseStyleSheet(resolveUrl(importUrl || importUrl2, url));
|
|
}).
|
|
replace(RE_ASSET_URL, function( match, quoteChar, assetUrl ) {
|
|
quoteChar = quoteChar || EMPTY_STRING;
|
|
return " url(" + quoteChar + resolveUrl(assetUrl, url) + quoteChar + ") ";
|
|
});
|
|
}
|
|
return EMPTY_STRING;
|
|
};
|
|
|
|
// --[ init() ]---------------------------------------------------------
|
|
function init() {
|
|
// honour the <base> tag
|
|
var url, stylesheet;
|
|
var baseTags = doc.getElementsByTagName("BASE");
|
|
var baseUrl = (baseTags.length > 0) ? baseTags[0].href : doc.location.href;
|
|
|
|
/* Note: This code prevents IE from freezing / crashing when using
|
|
@font-face .eot files but it modifies the <head> tag and could
|
|
trigger the IE stylesheet limit. It will also cause FOUC issues.
|
|
If you choose to use it, make sure you comment out the for loop
|
|
directly below this comment.
|
|
|
|
var head = doc.getElementsByTagName("head")[0];
|
|
for (var c=doc.styleSheets.length-1; c>=0; c--) {
|
|
stylesheet = doc.styleSheets[c]
|
|
head.appendChild(doc.createElement("style"))
|
|
var patchedStylesheet = doc.styleSheets[doc.styleSheets.length-1];
|
|
|
|
if (stylesheet.href != EMPTY_STRING) {
|
|
url = resolveUrl(stylesheet.href, baseUrl)
|
|
if (url) {
|
|
patchedStylesheet.cssText = patchStyleSheet( parseStyleSheet( url ) )
|
|
stylesheet.disabled = true
|
|
setTimeout( function () {
|
|
stylesheet.owningElement.parentNode.removeChild(stylesheet.owningElement)
|
|
})
|
|
}
|
|
}
|
|
}
|
|
*/
|
|
|
|
for (var c = 0; c < doc.styleSheets.length; c++) {
|
|
stylesheet = doc.styleSheets[c]
|
|
if (stylesheet.href != EMPTY_STRING) {
|
|
url = resolveUrl(stylesheet.href, baseUrl);
|
|
if (url) {
|
|
stylesheet.cssText = patchStyleSheet( parseStyleSheet( url ) );
|
|
}
|
|
}
|
|
}
|
|
|
|
// :enabled & :disabled polling script (since we can't hook
|
|
// onpropertychange event when an element is disabled)
|
|
if (enabledWatchers.length > 0) {
|
|
setInterval( function() {
|
|
for (var c = 0, cl = enabledWatchers.length; c < cl; c++) {
|
|
var e = enabledWatchers[c];
|
|
if (e.disabled !== e.$disabled) {
|
|
if (e.disabled) {
|
|
e.disabled = false;
|
|
e.$disabled = true;
|
|
e.disabled = true;
|
|
}
|
|
else {
|
|
e.$disabled = e.disabled;
|
|
}
|
|
}
|
|
}
|
|
},250)
|
|
}
|
|
};
|
|
|
|
// Bind selectivizr to the ContentLoaded event.
|
|
ContentLoaded(win, function() {
|
|
// Determine the "best fit" selector engine
|
|
for (var engine in selectorEngines) {
|
|
var members, member, context = win;
|
|
if (win[engine]) {
|
|
members = selectorEngines[engine].replace("*", engine).split(".");
|
|
while ((member = members.shift()) && (context = context[member])) {}
|
|
if (typeof context == "function") {
|
|
selectorMethod = context;
|
|
init();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
});
|
|
|
|
|
|
/*!
|
|
* ContentLoaded.js by Diego Perini, modified for IE<9 only (to save space)
|
|
*
|
|
* Author: Diego Perini (diego.perini at gmail.com)
|
|
* Summary: cross-browser wrapper for DOMContentLoaded
|
|
* Updated: 20101020
|
|
* License: MIT
|
|
* Version: 1.2
|
|
*
|
|
* URL:
|
|
* http://javascript.nwbox.com/ContentLoaded/
|
|
* http://javascript.nwbox.com/ContentLoaded/MIT-LICENSE
|
|
*
|
|
*/
|
|
|
|
// @w window reference
|
|
// @f function reference
|
|
function ContentLoaded(win, fn) {
|
|
|
|
var done = false, top = true,
|
|
init = function(e) {
|
|
if (e.type == "readystatechange" && doc.readyState != "complete") return;
|
|
(e.type == "load" ? win : doc).detachEvent("on" + e.type, init, false);
|
|
if (!done && (done = true)) fn.call(win, e.type || e);
|
|
},
|
|
poll = function() {
|
|
try { root.doScroll("left"); } catch(e) { setTimeout(poll, 50); return; }
|
|
init('poll');
|
|
};
|
|
|
|
if (doc.readyState == "complete") fn.call(win, EMPTY_STRING);
|
|
else {
|
|
if (doc.createEventObject && root.doScroll) {
|
|
try { top = !win.frameElement; } catch(e) { }
|
|
if (top) poll();
|
|
}
|
|
addEvent(doc,"readystatechange", init);
|
|
addEvent(win,"load", init);
|
|
}
|
|
};
|
|
})(this); |