Difference between revisions of "MediaWiki:Common.js"

Revision as of 18:03, 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.
 */
var upArrow = 'images/5/5b/Sort_up.gif';
var downArrow = 'images/7/7a/Sort_down.gif';
var noneArrow = 'images/e/e8/Sort_none.gif';

function sortTablesInit() {
    var idnum = 0;
    var tables = getElementsByClassName(document, 'table', 'sorts');

    for (var i = 0; i < tables.length ; i++) {
        if (!tables[i].id) {
            tables[i].setAttribute('id', 'sortable_table_id_' + idnum);
            ++idnum;
        }

        makeSortable(tables[i]);
    }
}

function makeSortable(table) {
    var firstRow;

    if (table.rows && table.rows.length > 0) {
        if (table.tHead && table.tHead.rows.length > 0) {
            firstRow = table.tHead.rows[table.tHead.rows.length - 1];
        } else {
            firstRow = table.rows[0];
        }
    }

    if (!firstRow) {
        return;
    }

    for (var i = 0; i < firstRow.cells.length; i++) {
        var cell = firstRow.cells[i];

        if ((' ' + cell.className + ' ').indexOf(' unsortable ') == -1) {
            cell.innerHTML += '&nbsp;&nbsp;<a href="#" class="sortheader" onclick="reSortTable(this);return false;"><span class="sortarrow"><img src="'+ noneArrow + '" alt="&darr;"/></span></a>';
        }
    }
}

function ts_getInnerText(el) {
    if (typeof el == 'string' || typeof el == 'undefined') {
        return el;
    }

    if (el.textContent) {
        return el.textContent;
    }

    if (el.innerText) {
        return el.innerText;
    }

    var innerText = '';
    var cs = el.childNodes;
    var l = cs.length;

    for (var i = 0; i < l; i++) {
        switch (cs[i].nodeType) {
            case 1: innerText += ts_getInnerText(cs[i]); break;
            case 3: innerText += cs[i].nodeValue; break;
        }
    }

    return innerText;
}

function reSortTable(lnk) {
    var span = lnk.getElementsByTagName('span')[0];
    var td = lnk.parentNode;
    var tr = td.parentNode;
    var column = td.cellIndex;
    var table = tr.parentNode;

    while (table && !(table.tagName && table.tagName.toLowerCase() == 'table')) {
        table = table.parentNode;
    }

    if (!table) {
        return;
    }

    if (table.rows.length <= 1) {
        return;
    }

    var rowStart = (table.tHead && table.tHead.rows.length > 0 ? 0 : 1);
    var itm = '';

    for (var i = rowStart; i < table.rows.length; i++) {
        if (table.rows[i].cells.length > column) {
            itm = ts_getInnerText(table.rows[i].cells[column]);
            itm = itm.replace(/^[\s\xa0]+/, '').replace(/[\s\xa0]+$/, '');

            if (itm != '') {
                break;
            }
        }
    }

    sortfn = sortCaseInsensitive;

    if (itm.match(/^\d\d[\/. -][a-zA-Z]{3}[\/. -]\d\d\d\d$/)) {
        sortfn = sortDate;
    }
    if (itm.match(/^\d\d[\/.-]\d\d[\/.-]\d\d\d\d$/)) {
        sortfn = sortDate;
    }
    if (itm.match(/^\d\d[\/.-]\d\d[\/.-]\d\d$/)) {
        sortfn = sortdate;
    }
    if (itm.match(/^[\u00a3$\u20ac]/)) {
        sortfn = sortCurrency;
    }
    if (itm.match(/^[\d.,]+\%?$/)) {
        sortfn = sortNumeric;
    }

    var reverse = (span.getAttribute('sortdir') == 'down');
    var newRows = new Array();

    for (var j = rowStart; j < table.rows.length; j++) {
        var row = table.rows[j];
        var keyText = ts_getInnerText(row.cells[column]);
        var oldIndex = (reverse ? -j : j);

        newRows[newRows.length] = new Array(row, keyText, oldIndex);
    }

    newRows.sort(sortfn);

    var arrowHTML;

    if (reverse) {
        arrowHTML = '<img src="' + downArrow + '" alt="&darr;"/>';
        newRows.reverse();
        span.setAttribute('sortdir', 'up');
    } else {
        arrowHTML = '<img src="' + upArrow + '" alt="&uarr;"/>';
        span.setAttribute('sortdir', 'down');
    }

    for (var i = 0; i < newRows.length; i++) {
        if ((' ' + newRows[i][0].className + ' ').indexOf(' sortbottom ') == -1) {
            table.tBodies[0].appendChild(newRows[i][0]);
        }
    }

    for (var i = 0; i < newRows.length; i++) {
        if ((' ' + newRows[i][0].className + ' ').indexOf(' sortbottom ') != -1) {
            table.tBodies[0].appendChild(newRows[i][0]);
        }
    }

    var spans = getElementsByClassName(tr, 'span', 'sortarrow');

    for (var i = 0; i < spans.length; i++) {
        spans[i].innerHTML = '<img src="' + noneArrow + '" alt="&darr;"/>';
    }

    span.innerHTML = arrowHTML;
}

function dateToSortKey(date) {	
    if (date.length == 11) {
        switch (date.substr(3, 3).toLowerCase()) {
            case 'jan': var month = '01'; break;
            case 'feb': var month = '02'; break;
            case 'mar': var month = '03'; break;
            case 'apr': var month = '04'; break;
            case 'may': var month = '05'; break;
            case 'jun': var month = '06'; break;
            case 'jul': var month = '07'; break;
            case 'aug': var month = '08'; break;
            case 'sep': var month = '09'; break;
            case 'oct': var month = '10'; break;
            case 'nov': var month = '11'; break;
            case 'dec': var month = '12'; break;
        }

        return date.substr(7, 4) + month + date.substr(0, 2);
    } else if (date.length == 10) {
        return date.substr(6, 4) + date.substr(0, 2) + date.substr(3, 2);
    } else if (date.length == 8) {
        year = date.substr(6, 2);

        if (parseInt(year) < 50) { 
            year = '20' + year; 
        } else { 
            year = '19' + year; 
        }

        return year + date.substr(0, 2) + date.substr(3, 2);
    }

    return '00000000';
}

function parseFloat(num) {
    if (!num) {
        return 0;
    }

    num = parseFloat(num.replace(/,/g, ''));

    return (isNaN(num) ? 0 : num);
}

function sortDate(a, b) {
    var aa = dateToSortKey(a[1]);
    var bb = dateToSortKey(b[1]);

    return (aa < bb ? -1 : aa > bb ? 1 : a[2] - b[2]);
}

function sortCurrency(a,b) {
	var aa = ts_parseFloat(a[1].replace(/[^0-9.]/g, ''));
	var bb = ts_parseFloat(b[1].replace(/[^0-9.]/g, ''));

	return (aa != bb ? aa - bb : a[2] - b[2]);
}

function sortNumeric(a, b) {
    var aa = parseFloat(a[1]);
    var bb = parseFloat(b[1]);

    return (aa != bb ? aa - bb : a[2] - b[2]);
}

function sortCaseInsensitive(a, b) {
    var aa = a[1].toLowerCase();
    var bb = b[1].toLowerCase();

    return (aa < bb ? -1 : aa > bb ? 1 : a[2] - b[2]);
}

function sortDefault(a, b) {
    return (a[1] < b[1] ? -1 : a[1] > b[1] ? 1 : a[2] - b[2]);
}

addOnloadHook(sortTablesInit);