Difference between revisions of "MediaWiki:Common.js"

Revision as of 19:56, 24 December 2009

/* 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);
    };
})();


/**
 * Code for collapsible tables.
 */
var autoCollapse = 2;
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 = document.getElementsByTagName('table');

    for (var i = 0; i < Tables.length; i++) {
        if (hasClass(Tables[i], 'collapsible')) {
            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');
            Spacer.appendChild(document.createTextNode('\u00a0'));

            Spacer.style.cssFloat = 'left';
            Spacer.style.styleFloat = 'left';
            Spacer.style.textAlign = 'left';
            Spacer.style.width = '35px';

            var Button = document.createElement('span');
            var ButtonLink = document.createElement('a');
            var ButtonText = document.createTextNode(collapseCaption);

            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.setAttribute('id', 'collapseButton' + tableIndex);
            ButtonLink.setAttribute('href', 'javascript:collapseTable(' + tableIndex + ');');
            ButtonLink.appendChild(ButtonText);

            Button.appendChild(document.createTextNode('['));
            Button.appendChild(ButtonLink);
            Button.appendChild(document.createTextNode(']'));

            Header.insertBefore(Spacer, Header.childNodes[0]);
            Header.insertBefore(Button, Header.childNodes[0]);
            tableIndex++;
        }
    }

    for (var i = 0; i < tableIndex; i++) {
        if (hasClass(NavigationBoxes[i], 'collapsed') || (tableIndex >= autoCollapse && 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 sortable 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>';
        }
    }
    alternate(table);
}

function 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 += 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 = 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 = 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;
    alternate(table);		
}

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 = parseFloat(a[1].replace(/[^0-9.]/g, ''));
    var bb = 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]);
}

function alternate(table) {
    var tableBodies = table.getElementsByTagName('tbody');
    for (var i = 0; i < tableBodies.length; i++) {
        var tableRows = tableBodies[i].getElementsByTagName('tr');

        for (var j = 0; j < tableRows.length; j++) {
            var oldClasses = tableRows[j].className.split(' ');
            var newClassName = '';

            for (var k = 0; k < oldClasses.length; k++) {
                if (oldClasses[k] != '' && oldClasses[k] != 'even' && oldClasses[k] != 'odd') {
                    newClassName += oldClasses[k] + ' ';
                }
            }

            tableRows[j].className = newClassName + (j % 2 == 0 ? 'even' : 'odd');
        }
    }
}