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https://github.com/Jermolene/TiddlyWiki5
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109 lines
2.5 KiB
JavaScript
109 lines
2.5 KiB
JavaScript
/*\
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title: $:/core/modules/utils/dom.js
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type: application/javascript
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module-type: utils
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Various static DOM-related utility functions.
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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/*
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Determines whether element 'a' contains element 'b'
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Code thanks to John Resig, http://ejohn.org/blog/comparing-document-position/
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*/
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exports.domContains = function(a,b) {
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return a.contains ?
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a != b && a.contains(b) :
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!!(a.compareDocumentPosition(b) & 16);
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};
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exports.hasClass = function(el,className) {
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return el.className.split(" ").indexOf(className) !== -1;
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};
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exports.addClass = function(el,className) {
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var c = el.className.split(" ");
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if(c.indexOf(className) === -1) {
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c.push(className);
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}
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el.className = c.join(" ");
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};
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exports.removeClass = function(el,className) {
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var c = el.className.split(" "),
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p = c.indexOf(className);
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if(p !== -1) {
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c.splice(p,1);
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el.className = c.join(" ");
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}
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};
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exports.toggleClass = function(el,className,status) {
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if(status === undefined) {
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status = !exports.hasClass(el,className);
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}
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if(status) {
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exports.addClass(el,className);
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} else {
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exports.removeClass(el,className);
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}
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};
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exports.applyStyleSheet = function(id,css) {
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var el = document.getElementById(id);
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if(document.createStyleSheet) { // Older versions of IE
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if(el) {
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el.parentNode.removeChild(el);
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}
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document.getElementsByTagName("head")[0].insertAdjacentHTML("beforeEnd",
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' <style id="' + id + '" type="text/css">' + css + '</style>'); // fails without
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} else { // Modern browsers
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if(el) {
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el.replaceChild(document.createTextNode(css), el.firstChild);
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} else {
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el = document.createElement("style");
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el.type = "text/css";
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el.id = id;
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el.appendChild(document.createTextNode(css));
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document.getElementsByTagName("head")[0].appendChild(el);
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}
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}
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};
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/*
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Get the scroll position of the viewport
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Returns:
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{
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x: horizontal scroll position in pixels,
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y: vertical scroll position in pixels
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}
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*/
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exports.getScrollPosition = function() {
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if("scrollX" in window) {
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return {x: window.scrollX, y: window.scrollY};
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} else {
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return {x: document.documentElement.scrollLeft, y: document.documentElement.scrollTop};
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}
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};
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/*
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Saves a named password in the browser
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*/
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exports.savePassword = function(name,password) {
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localStorage.setItem("tw5-password-" + name,password);
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};
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/*
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Retrieve a named password from the browser
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*/
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exports.getPassword = function(name) {
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return localStorage.getItem("tw5-password-" + name);
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};
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})();
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