Difference between revisions of "MediaWiki:Common.js"

Revision as of 13:11, 29 April 2010

/* Any JavaScript here will be loaded for all users on every page load. */

/**
 * Determines if a particular element possesses a class.
 */
var hasClass = (function () {
    var reCache = {};
    return function (element, className) {
        return (reCache[className] ? reCache[className] : (reCache[className] = new RegExp('(?:\\s|^)' + className + '(?:\\s|$)'))).test(element.className);
    };
})();

/**
 * Determines if a given value is a number.
 */
function isNumeric(value) {
    return new RegExp(/(^\d+$)|(^\d+\.\d+$)/).test(value);
}

/**
 * Removes all children from an element.
 */
function removeChildren(element) {
    while (element.hasChildNodes()) {
        element.removeChild(element.firstChild);
    }
}

/**
 * Implementation of classical inheritance for Objects.
 */
(function(){
    var initializing = false, fnTest = /xyz/.test(function() { xyz; }) ? /\b_super\b/ : /.*/;

    this.Class = function() { };
 
    Class.extend = function(prop) {
        var _super = this.prototype;

        initializing = true;
        var prototype = new this();
        initializing = false;

        for (var name in prop) {
            prototype[name] = typeof prop[name] == "function" && typeof _super[name] == "function" && fnTest.test(prop[name]) ? (function(name, fn) {
                return function() {
                    var tmp = this._super;
                    this._super = _super[name];
                    var ret = fn.apply(this, arguments);       
                    this._super = tmp;
                    return ret;
                };
            })(name, prop[name]) : prop[name];
        }

        function Class() {
            if (!initializing && this.init)
                this.init.apply(this, arguments);
        }

        Class.prototype = prototype;
        Class.constructor = Class;
        Class.extend = arguments.callee;

        return Class;
    };
})();

/**
 * Import more specific scripts.
 */
function hasCollapsibleTables() {
    var collapsibleTables = document.getElementsByClassName(document, 'table', 'collapsible');
    if (collapsibleTables) {
        importScript('MediaWiki:Common.js/Collapsible.js');
        for (var i = 0; i < collapsibleTables.length; i++) {
            var headerRow = collapsibleTables[i].getElementsByTagName('tr')[0];
            if (headerRow) {
                var header = headerRow.getElementsByTagName('th')[0];
                if (header) {
                    new CollapseButton(collapsibleTables[i], header);
                }
            }
        }
    }
}
addOnloadHook(hasCollapsibleTables);

importScript('MediaWiki:Common.js/Calculator.js');

if (wgAction == 'edit' || wgAction == 'submit')
{
    importScript('MediaWiki:Common.js/Editbar.js');
}