MediaWiki:Common.js/Core.js

/** Namespace constants */
var
NS_MEDIA          = -2,
NS_SPECIAL        = -1,
NS_MAIN           = 0,
NS_TALK           = 1,
NS_USER           = 2,
NS_USER_TALK      = 3,
NS_PROJECT        = 4,
NS_PROJECT_TALK   = 5,
NS_IMAGE          = 6,
NS_IMAGE_TALK     = 7,
NS_MEDIAWIKI      = 8,
NS_MEDIAWIKI_TALK = 9,
NS_TEMPLATE       = 10,
NS_TEMPLATE_TALK  = 11,
NS_HELP           = 12,
NS_HELP_TALK      = 13,
NS_CATEGORY       = 14,
NS_CATEGORY_TALK  = 15,
NS_ARTICLE        = 100,
NS_ARTICLE_TALK   = 101,
NS_PROPOSAL       = 102,
NS_PROPOSAL_TALK  = 103;
 
var
DEFAULT_USER_LANGUAGE = "en",
FALLBACK_USER_LANGUAGE = "en";
 
/**
	Here users can apply display settings for navigation frames by class name.
	Examples:
		// frames with the class “user-bigbadframe” should be hidden by default
		myElementsDisplay["bigbadframe"] = false;
 
		// frames with the class “user-important” should be visible by default
		myElementsDisplay["important"] = true;
*/
var myElementsDisplay = {};
 
/**
	Replaces the scope in a function with the object’s one.
	Based on definition from the Prototype framework (http://prototype.conio.net/).
*/
Function.prototype.bind = function(object) {
	var __method = this;
	return function() {
		return __method.apply(object, arguments);
	}
}
 
/** Trim leading chars (or white-spaces) */
String.prototype.ltrim = function(chars) {
	var s = typeof chars == "undefined" ? "\s" : chars;
	return this.replace(new RegExp("^[" + s + "]+", "g"), "");
}
 
/** Trim ending chars (or white-spaces) */
String.prototype.rtrim = function(chars) {
	var s = typeof chars == "undefined" ? "\s" : chars;
	return this.replace(new RegExp("[" + s + "]+$", "g"), "");
}
 
/** Trim leading and ending white-spaces */
String.prototype.trim = function() {
	return this.ltrim().rtrim();
}
 
/** Checks if a value exists in an array */
function inArray(val, arr) {
	var len = arr.length;
	for (var i = 0 ; i < len ; i++) {
		if (arr[i] === val) {
			return true;
		}
	}
	return false;
}
 
/** Set display mode for all elements with a given class name */
function setElementsDisplayByClassName(className, display) {
	var els = getElementsByClassName(document, "*", className);
	for (var i = 0; i < els.length; i++) {
		els[i].style.display = display;
	}
}
 
/** Hide all elements with a given class name */
function hideElementsByClassName(className) {
	setElementsDisplayByClassName(className, "none");
}
 
/** Show all elements with a given class name */
function showElementsByClassName(className) {
	setElementsDisplayByClassName(className, "");
}
 
 
/** Checks if an element belongs to a given CSS class */
function hasClass(elem, className) {
	return elem.className.indexOf( className ) != -1;
}