source: Dev/trunk/js/generalScripts.js @ 206

/* 
 * General functions, shared by most different scripts and elements.
 */

// Object literal version of a timer script, can be used to benchmark script running time.

var timeDiff  =  {
    setStartTime:function (){
        d = new Date();
        time  = d.getTime();
    },

    getDiff:function (){
        d = new Date();
        return (d.getTime()-time);
    }
}

// Check if a certain HTMLElement has a given classname
function hasClass(ele,cls) {
    if (ele.className)
        return ele.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
    
}

// Add a given classname to an HTMLElement
function addClass(ele,cls) {
    if (!this.hasClass(ele,cls)) ele.className += " "+cls;
}

// Remove a given class from an HTMLElement
function removeClass(ele,cls) {
    if (hasClass(ele,cls)) {
        var reg = new RegExp('(\\s|^)'+cls+'(\\s|$)');
        ele.className=ele.className.replace(reg,' ');
    }
}

// General function to handle AJAX functionality.
// Specify the request string, url to send to, the function to execute on response and whether to run in the background or wait for a response before continuing.
function newAjaxRequest(c, u, cb, async) {
    var xml;
    var content = c;    //an array of strings, in "key=value"  format.
    // assign a compatible request format
    if (window.XMLHttpRequest) {    //Not IE5, IE6
        xml = new XMLHttpRequest();
    }
    else {                          //IE5, IE6
        xml = new ActiveXObject("Microsoft.XMLHTTP");
    }
    // subscribe the callback function to a response event
    xml.onreadystatechange = function() {
        xml.responseText = "Processing...";
        if (xml.readyState == 4 && xml.status == 200) {
            cb(xml);
        }
    };
    // initialize XMLRequest
    xml.open("POST", u, async);
    xml.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    var contentString = "";
    //iterate through parameters passed in variable c
    if (typeof(content)=='object'&&(input instanceof Array)) {    // parameters were passed as an array of key=value strings
        for (var i = 0; i < content.length; i++) {
            contentString += content[i];
            if (i != (content.length - 1)) {
                contentString += "&";
            }
        }
    }
    else { // single parameter or string already formatted by calling function
        contentString = content;
    }
    // finally send the formatted request
    xml.send(contentString);
}

// Function that handles updating of info panel via AJAX getInfo.php. Currently operates on HTML to paste into #infoPanelContent, should eventually involve JSON arrays, to have more control over formatting.
function ajaxInfoRequest(uid, el, type) {
    // Info panel update.
    
    var c = "uid="+uid;
    c += "&type="+type;
    var u = "getInfo.php";
    newAjaxRequest(c, u, function(result) {
        el.innerHTML = result.responseText;
    }, true);
}

// Function to save the object currently being edited.
// !! Still needs to be generalized !!
function saveObject (confirmSave) {
    var answer = false;
    if (confirmSave==true) {
        answer = confirm("Save changes to pipeline?");
    }
    else {
        answer = true;
    }
    
    
    if (answer == true) {
        var pipeline = document.getElementById("pipelineStringField").value;
        pipeline = pipeline.slice(0, pipeline.length - 1);
        var types = document.getElementById("pipelineTypeField").value;
        types = types.slice(0, types.length - 1);
        var session = document.getElementById("sessionField").value;
        var requestString = "uids="+pipeline+"&types="+types+"&sessionUid="+session;
        console.log(requestString);
        
        
        var success;
        newAjaxRequest(requestString, "savesession.php", function(result){
            success = result.responseText;
        }, true);
        console.log(success);
    }
}

// Convert a string to an array and remove any empty items (from trailing commas)
function stringToArray(s, c) {
    var a = s.split(c);
    for (var i = 0; i < a.length; i++) {    // remove empty items
        if (a[i] == "") {
            a.splice(i, 1);
            i--;
        }
    }
    return a;
}

// Convert an array to a string, separated by character "c"
function arrayToString(a, c) {
    var s = "";
    for (var i = 0; i < a.length; i++) {
        if (a[i] != "") {
            s += a[i]+c;
        }
    }
    return s;
}

// Remove all newlines, carriage returns and tabs from a given string
function removeNL(s){ 
    return s.replace(/[\n\r\t]/g,""); 
}

// Shorthand for document.createElement, because that pops up about three times every line of the main program
function ce(s) {
    return document.createElement(s);
}

// Shorthand for document.getElementById, same reason as above
function ge(s) {
    return document.getElementById(s);
}