Subversion Repositories bacoAlunos

/**

 *

 * AJAX Functions

 *

 * This code is protected under GNU LGPL License

 *

 * @author Jorge Machado

 * @date April 2008

 **/

/**

 * Starts XMLHTTP Ajax request

 *

 * @author Jorge Machado

 * @date April 2008

 *

 * params:

 * @params HTTP GET Parameters for query string

 * @xmlHttpRequest request

 * @id target element

 * @stateChanged target function

 * @innerPhrase to put while waiting for response

 * @navjsp requested jsp

 */

function startRequest(xmlHttpRequest,params,id,stateChanged,innerPhrase,navjsp)

{

    var contentType = "application/x-www-form-urlencoded; charset=UTF-8";

    if(innerPhrase != '')

        getObjectById(id).innerHTML = innerPhrase;

    if (xmlHttpRequest==null)

    {

        alert ("Browser does not support HTTP Request");

        return;

    }

    var finalParams = "";

    var url= navjsp;

    if(params != null && params.length > 0)

    {

        //url=url+"?"+ params;

        //url=url+"&sid="+Math.random();

        url=url+"?sid="+Math.random();

        var paramsArray = params.split("&");

        var i;

        var union = '';

        for(i = 0; i < paramsArray.length; i++){

            var parameter = paramsArray[i].split("=");

            if(parameter.length == 2)

            {

                finalParams += union + parameter[0] + '=' + encodeURIComponent(parameter[1]);

                union = '&';

            }

        }

    }

    else

    {

        url=url+"?sid="+Math.random();

    }

    xmlHttpRequest.onreadystatechange=stateChanged;

    xmlHttpRequest.open("POST",url,true);

    xmlHttpRequest.setRequestHeader("Content-Type", contentType);

    xmlHttpRequest.send(finalParams);

}

/**

 * Return an HTML element given ID

 *

 * @author Jorge Machado

 * @date April 2008

 *

 * params:

 * @objectId required object

 */

function getObjectById(objectId)

{

    // cross-browser function to get an object's style object given its id

    try

    {

        if(document.getElementById && document.getElementById(objectId))

        {

            // W3C DOM

            return document.getElementById(objectId);

        }

        else if (document.all(objectId))

        {

            // MSIE 4 DOM

            return document.all(objectId);

        }

        else if (document.layers && document.layers[objectId])

        {

            // NN 4 DOM.. note: this won't find nested layers

            return document.layers[objectId];

        }

        else

        {

            return false;

        }

    }

    catch(e)

    {

        return false;

    }

}

function hide(id,showId)

{

    hideOne(id);

    showOne(showId);

}

function show(id,hideId)

{

    hideOne(hideId);

    showOne(id);

}

function hideOne(id)

{

//    getObjectById(id).style.visibility='hidden';

//    getObjectById(id).style.position='absolute';

    getObjectById(id).style.display='none';

}

function showOne(id)

{

//    getObjectById(id).style.visibility='visible';

//    getObjectById(id).style.position='relative';

    getObjectById(id).style.display='';

}

function showOrHideOne(id)

{

    if(getObjectById(id).style.display == 'none')

        showOne(id);

    else

        hideOne(id);

}

function showOrHide(id,hideValue,showValue)

{

    if(getObjectById(id).style.display == 'none')

    {

        showOne(id);

        return showValue;

    }

    else

    {

        hideOne(id);

        return hideValue;

    }

}

/**

 * Creates a new XmlHttpObject

 * @author Jorge Machado

 * @date April 2008

 *

 * params:

 * @handler target xmlHttpObject function

 */

function GetXmlHttpObject(handler)

{

    var objXmlHttp = null;

    if (navigator.userAgent.indexOf("Opera")>=0)

    {

        alert("This example doesn't work in Opera") ;

        return objXmlHttp;

    }

    if (navigator.userAgent.indexOf("MSIE")>=0)

    {

        var strName="Msxml2.XMLHTTP";

        if (navigator.appVersion.indexOf("MSIE 5.5")>=0)

        {

            strName="Microsoft.XMLHTTP";

        }

        try

        {

            objXmlHttp=new ActiveXObject(strName);

            objXmlHttp.onreadystatechange=handler ;

            return objXmlHttp;

        }

        catch(e)

        {

            alert("Error. Scripting for ActiveX might be disabled") ;

            return objXmlHttp;

        }

    }

    if (navigator.userAgent.indexOf("Mozilla")>=0)

    {

        objXmlHttp=new XMLHttpRequest();

        objXmlHttp.onload=handler;

        objXmlHttp.onerror=handler;

        return objXmlHttp;

    }

}

/***************************************************

 TopFlashNews

 ***************************************************/

var xmlHttpTopFlashNews;

var getFlashNewsTimeout;

var getFlashNewsJsp;

var semaphoreFlashNews = 0;

function getFlashNews(jsp,timeout)

{

    getFlashNewsJsp = jsp;

    getFlashNewsTimeout = timeout;

    semaphoreFlashNews = 1;

    getFlashNewsTimeoutCall();

}

function getFlashNewsTimeoutCall()

{

    xmlHttpTopFlashNews=GetXmlHttpObject(stateChangedGetFlashNews);

    semaphoreFlashNews = 1;

    startRequest(xmlHttpTopFlashNews,"","flashTopNews",stateChangedGetFlashNews,"",getFlashNewsJsp)

}

function stateChangedGetFlashNews()

{

    if (semaphoreFlashNews == 1 && (xmlHttpTopFlashNews.readyState==4 || xmlHttpTopFlashNews.readyState=="complete"))

    {

        getObjectById("flashTopNews").innerHTML=xmlHttpTopFlashNews.responseText;

        setTimeout(getFlashNewsTimeoutCall,getFlashNewsTimeout);

        semaphoreFlashNews = 0;

    }

}

/***************************************************

 Search

 ***************************************************/

var xmlHttpSearch;

var searchResultsDiv;

function searchCall(div,query,searchType,page,module,action)

{

    searchResultsDiv = div;

    xmlHttpSearch=GetXmlHttpObject(stateChangedSearchCall);

    startRequest(xmlHttpSearch,"dispatch=searchModule&query=" + query + "&searchType=" + searchType + "&page=" + page + "&module=" + module,"",stateChangedSearchCall,"",action);

}

function stateChangedSearchCall()

{

    if (xmlHttpSearch.readyState==4 || xmlHttpSearch.readyState=="complete")

    {

        getObjectById(searchResultsDiv).innerHTML=xmlHttpSearch.responseText;

    }

}

/***************************************************

 Pop

 ***************************************************/

var xmlHttpPop;

var popDiv;

function loadPop(div,action)

{

    popDiv = div;

    xmlHttpPop=GetXmlHttpObject(stateChangedPopCall);

    startRequest(xmlHttpPop,"","",stateChangedPopCall,"",action);

}

function stateChangedPopCall()

{

    if (xmlHttpPop.readyState==4 || xmlHttpPop.readyState=="complete")

    {

        getObjectById(popDiv).innerHTML=xmlHttpPop.responseText;

    }

}

/***************************************************

 Reminders

 ***************************************************/

var activeRemindersCounter = 0;

var expiredRemindersCounter = 0;

var semaphoreReminder = 0;

function setActiveReminders(active)

{

    activeRemindersCounter = active;

}

function setExpiredReminders(expired)

{

    expiredRemindersCounter = expired;

}

var xmlHttpReminder;

var newReminderId;

var reminderFormId;

var putMsgId;

var putOkMsg;

var putFailMsg;

function putReminder(startDate,expireDate,text,newReminderDiv,msgDiv,reminderFormDiv,action,waitMsg,okMsg,failMsg)

{

    if(semaphoreReminder == 1)

    {

        getObjectById(putMsgId).innerHTML = "<div class=\"messages\">busy...</div>";

    }

    else

    {

        semaphoreReminder = 1;

        newReminderId = newReminderDiv;

        reminderFormId = reminderFormDiv;

        putMsgId = msgDiv;

        putOkMsg = okMsg;

        putFailMsg = failMsg;

        getObjectById(putMsgId).innerHTML = waitMsg;

        xmlHttpReminder=GetXmlHttpObject(stateChangedPutReminderCall);

        startRequest(xmlHttpReminder,"dispatch=save&startDate="+startDate+"&expireDate="+expireDate+"&reminderView.text="+ text,"",stateChangedPutReminderCall,"",action);

//    hideOne(reminderFormId);

        showOne(putMsgId);

    }

}

function stateChangedPutReminderCall()

{

    if (xmlHttpReminder.readyState==4 || xmlHttpReminder.readyState=="complete")

    {

        if(xmlHttpReminder.responseText.indexOf("<div class=\"messages\">") >= 0)

        {

            getObjectById(putMsgId).innerHTML = xmlHttpReminder.responseText;

        }

        else if(semaphoreReminder == 1)

        {

            semaphoreReminder = 0;

            getObjectById(putMsgId).innerHTML = '<div class="statusOK">' + putOkMsg + '</div>';

            activeRemindersCounter = activeRemindersCounter + 1;

            showOne('activeReminders');

            getObjectById(newReminderId).innerHTML = xmlHttpReminder.responseText + getObjectById(newReminderId).innerHTML;

        }

    }

    setTimeout(cleanReminderStatus,3000);

}

function cleanReminderStatus()

{

   getObjectById(putMsgId).innerHTML = '';

}

function deleteExpiredReminder(id,deleteReminderDiv,msgDiv,reminderFormDiv,action,waitMsg,okMsg,failMsg)

{

    deleteReminder(id,deleteReminderDiv,msgDiv,reminderFormDiv,action,waitMsg,okMsg,failMsg,stateChangedDeleteExpiredReminderCall);

}

function deleteActiveReminder(id,deleteReminderDiv,msgDiv,reminderFormDiv,action,waitMsg,okMsg,failMsg)

{

    deleteReminder(id,deleteReminderDiv,msgDiv,reminderFormDiv,action,waitMsg,okMsg,failMsg,stateChangedDeleteActiveReminderCall);

}

function deleteReminder(id,deleteReminderDiv,msgDiv,reminderFormDiv,action,waitMsg,okMsg,failMsg,callBack)

{

    newReminderId = deleteReminderDiv;

    reminderFormId = reminderFormDiv;

    putMsgId = msgDiv;

    putOkMsg = okMsg;

    putFailMsg = failMsg;

    getObjectById(putMsgId).innerHTML = waitMsg;

    xmlHttpReminder=GetXmlHttpObject(callBack);

    startRequest(xmlHttpReminder,"dispatch=delete&id="+id,"",callBack,"",action);

    //hideOne(reminderFormId);

    showOne(putMsgId);

}

function stateChangedDeleteExpiredReminderCall()

{

    stateChangedDeleteReminderCall("expired");

    if(expiredRemindersCounter <= 0)

    {

        hideOne('expiredReminders');

    }

    if(expiredRemindersCounter < 0)

        expiredRemindersCounter = 0;

}

function stateChangedDeleteActiveReminderCall()

{

    stateChangedDeleteReminderCall("active");

    if(activeRemindersCounter <= 0)

    {

        hideOne('activeReminders');

    }

    if(activeRemindersCounter < 0)

        activeRemindersCounter = 0;

}

function stateChangedDeleteReminderCall(type)

{

    if (xmlHttpReminder.readyState==4 || xmlHttpReminder.readyState=="complete")

    {

        if(type == "active")

            activeRemindersCounter--;

        else

            expiredRemindersCounter--;

        if(xmlHttpReminder.responseText.indexOf("<div class=\"messages\">") >= 0)

        {

            getObjectById(putMsgId).innerHTML = xmlHttpReminder.responseText;

        }

        else

        {

            getObjectById(putMsgId).innerHTML = '<div class="statusOK">' + putOkMsg + '</div>';

            getObjectById(newReminderId).innerHTML = '';

        }

    }

    setTimeout(cleanReminderStatus,3000);

}