Difference between revisions of "MediaWiki:Common.js"

Revision as of 17:27, 3 January 2010

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

/**
 * Tests 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);
    };
})();

/**
 * Custom getElementsByClassName by Snook + Nyman
 */
function getElementsByClassName(oElm, strTagName, oClassNames){
	var arrElements = (strTagName == '*' && oElm.all) ? oElm.all : oElm.getElementsByTagName(strTagName);
	var arrReturnElements = new Array();
	var arrRegExpClassNames = new Array();

	if (typeof oClassNames == 'object') {
		for (var i = 0; i < oClassNames.length; i++) {
			arrRegExpClassNames[arrRegExpClassNames.length] = new RegExp('(^|\\s)' + oClassNames[i].replace(/\-/g, '\\-') + '(\\s|$)');
		}
	} else {
		arrRegExpClassNames[arrRegExpClassNames.length] = new RegExp('(^|\\s)' + oClassNames.replace(/\-/g, '\\-') + '(\\s|$)');
	}

	var oElement;
	var bMatchesAll;

	for (var j = 0; j < arrElements.length; j++) {
		oElement = arrElements[j];
		bMatchesAll = true;

		for (var k = 0; k < arrRegExpClassNames.length; k++) {
			if(!arrRegExpClassNames[k].test(oElement.className)) {
				bMatchesAll = false;
				break;
			}
		}

		if (bMatchesAll) {
			arrReturnElements[arrReturnElements.length] = oElement;
		}
	}

	return arrReturnElements;
}

/**
 * Code for collapsible tables.
 */
var collapseCaption = 'hide';
var expandCaption = 'show';

function collapseTable(tableIndex) {
    var button = document.getElementById('collapseButton' + tableIndex);
    var table = document.getElementById('collapsibleTable' + tableIndex);

    if (!table || !button) {
        return false;
    }

    var rows = table.rows;

    if (button.firstChild.data == collapseCaption) {
        for (var i = 1; i < rows.length; i++) {
            rows[i].style.display = 'none';
        }
        button.firstChild.data = expandCaption;
    } else {
        for (var i = 1; i < rows.length; i++) {
            rows[i].style.display = rows[0].style.display;
        }
        button.firstChild.data = collapseCaption;
    }
}

function createCollapseButtons() {
    var tableIndex = 0;
    var navigationBoxes = new Object();
    var tables = getElementsByClassName(document, 'table', 'collapses');

    for (var i = 0; i < tables.length; i++) {
        var headerRow = tables[i].getElementsByTagName('tr')[0];
        if (!headerRow) {
            continue;
        }

        var header = headerRow.getElementsByTagName('th')[0];
        if (!header) {
            continue;
        }

        navigationBoxes[tableIndex] = tables[i];
        tables[i].setAttribute('id', 'collapsibleTable' + tableIndex);

        var spacer = document.createElement('div');
        var button = document.createElement('span');
        var buttonLink = document.createElement('a');
        var buttonText = document.createTextNode(collapseCaption);

        spacer.style.cssFloat = 'left';
        spacer.style.styleFloat = 'left';
        spacer.style.textAlign = 'left';
        spacer.style.width = '35px';
        spacer.appendChild(document.createTextNode('\u00a0'));
        header.insertBefore(spacer, header.childNodes[0]);

        button.style.cssFloat = 'right';
        button.style.styleFloat = 'right';
        button.style.fontSize = '11px';
        button.style.fontWeight = 'normal';
        button.style.textAlign = 'right';
        button.style.width = '35px';

        buttonLink.style.color = '#FFFFFF';
        buttonLink.id = 'collapseButton' + tableIndex;
        buttonLink.href = 'javascript:collapseTable(' + tableIndex + ');';
        buttonLink.appendChild(buttonText);

        button.appendChild(document.createTextNode('['));
        button.appendChild(buttonLink);
        button.appendChild(document.createTextNode(']'));
        header.insertBefore(button, header.childNodes[0]);

        tableIndex++;
    }

    for (var i = 0; i < tableIndex; i++) {
        if (hasClass(navigationBoxes[i], 'collapsed') || (tableIndex >= 2 && hasClass(navigationBoxes[i], 'autocollapse'))) {
            collapseTable(i);
        } 
        else if (hasClass(navigationBoxes[i], 'innercollapse')) {
            var element = navigationBoxes[i];
            while (element = element.parentNode) {
                if (hasClass(element, 'outercollapse')) {
                    collapseTable(i);
                    break;
                }
            }
        }
    }
}

addOnloadHook(createCollapseButtons);

/**
 * Code for sorting tables.
 */