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TiddlyWiki5/editions/tw2/source/tiddlywiki/jquery/plugins/jQuery.twStylesheet.js

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/*
jQuery.twStylesheet.js
jQuery plugin to dynamically insert CSS rules into a document
Usage:
jQuery.twStylesheet applies style definitions
jQuery.twStylesheet.remove neutralizes style definitions
Copyright (c) UnaMesa Association 2009
Triple licensed under the BSD, MIT and GPL licenses:
http://www.opensource.org/licenses/bsd-license.php
http://www.opensource.org/licenses/mit-license.php
http://www.gnu.org/licenses/gpl.html
*/
(function($) {
var defaultId = "customStyleSheet"; // XXX: rename to dynamicStyleSheet?
// Add or replace a style sheet
// css argument is a string of CSS rule sets
// options.id is an optional name identifying the style sheet
// options.doc is an optional document reference
// N.B.: Uses DOM methods instead of jQuery to ensure cross-browser comaptibility.
$.twStylesheet = function(css, options) {
options = options || {};
var id = options.id || defaultId;
var doc = options.doc || document;
var el = doc.getElementById(id);
if(doc.createStyleSheet) { // IE-specific handling
if(el) {
el.parentNode.removeChild(el);
}
doc.getElementsByTagName("head")[0].insertAdjacentHTML("beforeEnd",
'&nbsp;<style id="' + id + '" type="text/css">' + css + '</style>'); // fails without &nbsp;
} else { // modern browsers
if(el) {
el.replaceChild(doc.createTextNode(css), el.firstChild);
} else {
el = doc.createElement("style");
el.type = "text/css";
el.id = id;
el.appendChild(doc.createTextNode(css));
doc.getElementsByTagName("head")[0].appendChild(el);
}
}
};
// Remove existing style sheet
// options.id is an optional name identifying the style sheet
// options.doc is an optional document reference
$.twStylesheet.remove = function(options) {
options = options || {};
var id = options.id || defaultId;
var doc = options.doc || document;
var el = doc.getElementById(id);
if(el) {
el.parentNode.removeChild(el);
}
};
})(jQuery);