appjet-app-base/lib-support/footer.js

/* appjet:version 0.1 */
/* appjet:library */
// Copyright (c) 2009, Herbert Vojčík
// Licensed by MIT license (http://www.opensource.org/licenses/mit-license.php)

var _re = /<div[^>]*id=['"]appjetfooter['"][^>]*>/;

/**@ignore*/
function replaceTheFooter(f) {
    var _oldrender = page.render;

    /**@ignore*/
    page.render = function() {
        page.render = _oldrender;
        var result = page.render();
        var index = _findFooterIndex(result);
        if (index !== -1) { result[index] = f(result[index]); }
        return result;
    };

    function _findFooterIndex(array) {
        for (var i = array.length - 1; i >= 0; --i) {
            if (array[i].match(_re)) {
                return i;
            }
        }
        return -1;
    }
}
/**
 * At render time, inserts the content provided
 * by the supplied function into the footer.
 */
function extendTheFooter(f) {
    replaceTheFooter(function(footer) {
        return footer.replace(_re, function(a) {
            return a+toHTML(DIV(f()));
        });
    });
}

/**
 * Hides the footer at render time.
 */
function hideTheFooter(f) {
    replaceTheFooter(function() { return ""; });
}


/* appjet:server */
import(appjet.appName);

extendTheFooter(function() {
    return SPAN(
        "Server time is: ",
        new Date(),
        " ",
        SPAN({style:"color:silver"}, "(this line extends the footer)")
    );
});

//hideTheFooter();