// JavaScript Document

var numPages=8;
var popWidth = 500;
var popHeight = 350;
var pageWidth = 705;
var characterWidth = 300;
var showCharacter = false;
var currentlyReading = false;
var MIN_CHUNK_SIZE = 400;
var MAX_CHUNKS = 10;
var EulogyTemplate = "<br>";

function setPage(n)
{
                // close any open popups
                closePopup();

                if (n != "add_users")
                {

                        // show the relevant page of the Eulogy writer
                        for (var i=0;i<=numPages;i++)
                        {
                                        document.getElementById("page"+i).style.display="none";
                        }
                        document.getElementById("page"+n).style.display="block";

                        // show the Eulogy Text if switching to that page
                        if (n == 7)
                                window.setTimeout('setText()',50);
                        else
                                getText();

                }

                else
                {
                        location.href='users.php';
                }
}
function createEulogy()
{
        if (confirm("Click OK to create a new Eulogy based on the data you have saved in Eulogy Builder.\n\nPlease note that this will replace your current Eulogy completely.\n\nClick Cancel to preserve your current Eulogy.\n\n"))
        {
                var frm = document.getElementById("frmEulogy");
                frm.action = "createEulogy.php" ;
                frm.submit();
        }
}
function setText()
{
                // save local textbox to editor
                var frm = document.getElementById("frmEulogy");
                                if (frm.eCopyOfText.value != "")
                        sed.setText(frm.eCopyOfText.value);
                                else
                                        sed.setText(EulogyTemplate);
}
function getText()
{
        // save editor to local textbox
        var edTxt = sed.getText();
        var frm = document.getElementById("frmEulogy");
        if (edTxt != "")
        {
                frm.eCopyOfText.value = edTxt;
        }
}
function setup()
{
         // set the initial conditions for the form
         var eName = document.getElementById("eFriendlyName");
         if (eName != "") preferredNameSubstitute(eName.value);

                // show or hide the further education box as appropriate
         var fe = document.getElementById("showFE");
         if (fe.checked == 1) showFEBox();
         else hideFEBox();

                 // show or hide the children box as appropriate
                 var _hasChildren = document.getElementById("hasChildren");
                 if (_hasChildren.checked == 1) showhideBox("childrenBox");
                 else hideBox("childrenBox");

         frm = document.getElementById("frmEulogy");
         sed.setText(frm.eCopyOfText.value);

                 // add dragging for the popup and the character
                 _popup = document.getElementById("popup");
                 _poptitle = document.getElementById("poptitle");
                                 _character = document.getElementById("character");
                                 _characterTitle = document.getElementById("characterTitle");
                 Drag.init(_poptitle,_popup);
                                 Drag.init(_characterTitle,_character);

         // jump to page (if requested)
         var pn = document.getElementById("hpagenum").value;

         if (pn != "")
             setPage(pn);
                 else
                          setPage(0);

                // hide timer
                document.getElementById("timer").style.display = "none";

}
function getData(stuffRequested, id, returnToID)
{
        sendRequest(stuffRequested + '&id='+id + '&returnto=' + returnToID)
}
function preferredNameSubstitute(name)
{
                var intLbl = 0;
                var intLbl1 = 0;

                // replace labels
        labels = document.frmEulogy.getElementsByTagName("label");
        for (i = 0; i < labels.length; i++)
                labels[i].innerHTML = name;

                // replace -name- in options boxes
                options = document.frmEulogy.getElementsByTagName("option");
                for (i = 0; i < options.length; i++)
                {
                        var fName = document.getElementById("eFriendlyName").value;
                        var gender = document.getElementById("eGender").value;
                        var Gender = "his";
                        if (gender == "female") Gender = "her";
                        options[i].innerHTML = options[i].innerHTML.replace(/-name-/g,fName);  // globally replace the -name- string
                        options[i].innerHTML = options[i].innerHTML.replace(/-hisher-/g,Gender);  // globally replace the -hisher- string
                }

}
function clearChild(obj)
{
        if (obj.value == "0")
        {
        switch (obj.id)
        {
                case ("child1Gender"):
                       document.getElementById("child1Age").value = "";
                       document.getElementById("child1Name").value = "";
                       break;
                case ("child2Gender"):
                       document.getElementById("child2Age").value = "";
                       document.getElementById("child2Name").value = "";
                       break;
                case ("child3Gender"):
                       document.getElementById("child3Age").value = "";
                       document.getElementById("child3Name").value = "";
                       break;
                case ("child4Gender"):
                       document.getElementById("child4Age").value = "";
                       document.getElementById("child4Name").value = "";
                       break;
                }
        }
}


// 'AJAX' functions ------------------------------------------------------------------------- //
function createRequestObject() {
    var ro;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer"){
        ro = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        ro = new XMLHttpRequest();
    }
    return ro;
}

var http = createRequestObject();

function sendRequest(action) {
    http.open('get', 'dblink.php?action='+action);
    http.onreadystatechange = handleResponse;
    http.send(null);
}

function handleResponse() {
    if(http.readyState == 4){

        // coolect variable to subsitute into any response
        var fName = document.getElementById("eFriendlyName").value;
        var gender = document.getElementById("eGender").value;
        var Gender = "his";
        if (gender == "female") Gender = "her";

       // collect the response
        var response = http.responseText;
        var update = new Array();
        //alert (response);
        if(response.indexOf('|' != -1)) {
            update = response.split('|');
            // fill in the control (if appropriate) and subst -name- with friendly name
            // globally replace the -hisher- string
            document.getElementById(update[0]).value = update[1].replace(/-name-/g,fName).replace(/-hisher-/g,Gender);
        }
    }
}
//  End of 'AJAX' functions ---------------------------------------------------------------- //

function vh_talkStarted()
{
  document.body.style.cursor = 'default';
}
function vh_talkEnded()
{
        hideCharacter();
        currentlyReading = false;
        _btn = document.getElementById("btnSpeak");
        _btn.src = "images/speak.gif";
        _btn.alt = "Read my Eulogy";
}
function removeHTMLblock(aSourceString, aTagName){
        regexp= new RegExp ("<" + aTagName + "[^.]\.*\/*" + aTagName + ">", "gi");
        vStrippedHTML = aSourceString.replace(regexp,"");
        return vStrippedHTML;
}
function removeIBlocks(txt)
{
        var pos = 0;

        while (pos>-1)
        {
                pos = txt.indexOf("<i>");
                pos1 = txt.indexOf("</i>");
                if ((pos > -1) && (pos1 > -1))
                {
                        txt = txt.substring (0,pos) + txt.substring (pos1+4,txt.length);
                        pos = txt.indexOf("<i>");
                }
        }
        return txt;
}
//function removeNL(s){
  // removes control characters
//  return s.replace(/[\n\r\t]/g,);
//}
function removeNL(s) {

  //  Remove NewLine, CarriageReturn and Tab characters from a String
  r = "";
  for (i=0; i < s.length; i++) {
    if (s.charAt(i) != '\n' &&
        s.charAt(i) != '\r' &&
        s.charAt(i) != '\t') {
      r += s.charAt(i);
      }
    }
  return r;
  }
function removeUnicodeChars(s)
{
        var r = "";
        for (i=0; i < s.length; i++)
        {
          var c = s.charCodeAt(i);
          if ((c > 31) && (c < 123))
          {
                  if ((c=32) || (c=33)|| (c=44) || (c=46) || ((c>47) && (c<60)) || (c=63) || ((c>64) && (c<90)) || ((c>96) && (c<123)))
                          r += s.charAt(i);
          }
        }
        return r;
}
function removeWhiteSpace (str) {
  return str.replace(/\s+/g,' ');
}
function readEulogy()
{
                // set the speech rate controls
                var srate = "<prosody rate='85%'>";
                var end_srate = "</prosody>";

        // set the cursor to 'wait'
        document.body.style.cursor = 'wait';

                // show the character (will either show or hide depending on the showCharacter boolean)
                showhideCharacter();
                followCursor(0);  // don't follow the cursor

                //  change the play button to a stop button
                _btn = document.getElementById("btnSpeak");
                if (!currentlyReading)
                {
                        currentlyReading = true;
                        _btn.src = "images/speak_off.gif";
                        _btn.alt = "Stop reading my Eulogy";
                }
                else
                {
                        stopReading();
                        return;
                }

        var txt = sed.getText();
                txt = removeUnicodeChars(txt);
                txt = removeWhiteSpace(txt);
                txt = removeIBlocks(txt);  //  don't read anything in italics
                txt = removeNL(txt)        //  remove control characters

           //     alert ("txt="+ txt);

                txt = txt.replace(/&nbsp;/gi,"");                                                // remove any non-breakable spaces
                txt = txt.replace( new RegExp( "<p>", "gi" ), "" );     // remove opening paragraphs
                txt = txt.replace( new RegExp( "</p>", "gi" ), "." );   // replace closing paragraphs with a fullstop
                txt = txt.replace( new RegExp( "<br>", "gi" ), "," );   // replace breaks with a comma

        var tlen = txt.length;

        // break into chunks of less than 600 characters (for the synthesis engine)
        // look for the first full stop after n00 characters and call this a chunk
        var chunk = "";
        var have_chunk = false;
        var i = 0;
        var chunki = 0;
        var chunk_count = 0;

        while ((i < tlen) && (chunk_count < MAX_CHUNKS))
        {
                chunk = "";
                have_chunk = false;
                chunki = 0;

                while (!have_chunk)
                {
                        chr = txt.substring(i,i+1);
                        chunk = chunk + chr;
                        i+= 1;
                        chunki += 1;
                        if (((chunki > MIN_CHUNK_SIZE) && (chr == ".")) || (i >= tlen))
                        {
                                have_chunk = true;
                                chunk_count += 1;
                                if (chunk.length > 1)
                                {
                                                                    //    alert (chunk);
                                    sayText(srate + chunk + end_srate,5,1,2);
                                }
                                else break;
                        }
                }
        }
}
function stopReading()
{
        stopSpeech();
        currentlyReading = false;
        document.body.style.cursor = 'default';
        _btn = document.getElementById("btnSpeak");
        _btn.src = "images/speak.gif";
        _btn.alt = "Read my Eulogy";
        hideCharacter();
}
function printEulogy()
{
        sed.printme();
}
function insertRef()
{
        // insert the currently selected Reference in to Eulogy writer
        var html = document.getElementById("refSelected").value;
        html = html.replace(/\n/g,"<br/>").replace(/\r/g,"").replace(/<br>/g,"<br/>");
        sed.insertTag(html);
        closePopup();
}
function showFEBox() {
        var box = document.getElementById("furtherEducation");
        if (box.style.display == "none") box.style.display = "block";
        else box.style.display = "none";
}
function hideFEBox()
{
       var box = document.getElementById("furtherEducation");
       box.style.display = "none";
}
function showhideBox(boxID){
                var box = document.getElementById(boxID);
        if (box.style.display == "none") box.style.display = "block";
        else box.style.display = "none";
}
function hideBox(boxID)
{
       var box = document.getElementById(boxID);
       box.style.display = "none";
}
function changeCharacterAvailability()
{
        _btnCharacter = document.getElementById("btnCharacter");
        if (showCharacter)
        {
                showCharacter = false;
                _btnCharacter.src = "images/hideSpeaker.gif";
                _btnCharacter.alt = "Hide the character when reading my Eulogy";
        }
        else
        {
                showCharacter = true;
                _btnCharacter.src = "images/showSpeaker.gif";
                _btnCharacter.alt = "Show the character when reading my Eulogy";
        }
}
function showhideCharacter()
{
        _character = document.getElementById("character");

        if ((+_character.style.top.replace(/px/,'') < 0) && showCharacter)
        {
                // show the character
                _character.style.top = "64px";
                var proposedLeft= (pageWidth - characterWidth) / 2;
            if (proposedLeft < 0) proposedLeft = 0;
                _character.style.left = proposedLeft + "px";
        }
        else
        {
                // hide the character
                _character.style.top = "-1000px";
        }
}
function hideCharacter()
{
        _character = document.getElementById("character");
        _character.style.top = "-1000px";
}
function saveEulogy(n){
        // provides basic sanity checking and submits form to be saved
        // it saves everything on the Eulogy pages and returns the user to
        // the page containing the clicked 'save' button.
        var frm = document.getElementById("frmEulogy");
                var eid = document.getElementById("heulogyid").value;

        frm.eCopyOfText.value = sed.getText();
        frm.action = "saveEulogy.php?page=" + n +"&eulogyid=" + eid ;
        frm.submit();
}
function addBible()
{
        // shows the dialog to add a biblical reference
        btn = document.getElementById("btn_addBible");
        pop = document.getElementById("popup");
                _poptitle = document.getElementById("poptitle");
                centrePopUp();

                // show the relevant list of titles
                document.getElementById("refBibleSelector").style.display = "block";
                document.getElementById("refPoemSelector").style.display = "none";
                document.getElementById("refJokeSelector").style.display = "none";

        if (pop.style.display != "block")
        {
            pop.style.display = "block";
            btn.src = "images/add_a_biblical_reference_up.gif";
                        _poptitle.innerHTML = "Add a Biblical Reference";
        }
        else
        {
            pop.style.display = "none";
            btn.src = "images/add_a_biblical_reference.gif" ;
        }
}
function addPoem()
{
        // shows the dialog to add a poem or part of a poem
        btn = document.getElementById("btn_addPoem");
        pop = document.getElementById("popup");
                _poptitle = document.getElementById("poptitle");
                centrePopUp();

                // show the relevant list of titles
                document.getElementById("refBibleSelector").style.display = "none";
                document.getElementById("refPoemSelector").style.display = "block";
                document.getElementById("refJokeSelector").style.display = "none";

        if (pop.style.display != "block")
        {
            pop.style.display = "block";
            btn.src = "images/add_a_poem_up.gif";
                        _poptitle.innerHTML = "Add a Poem";
        }
        else
        {
            pop.style.display = "none";
            btn.src = "images/add_a_poem.gif" ;
        }
}
function addJoke()
{
        // shows the dialog to add a joke
        btn = document.getElementById("btn_addJoke");
        pop = document.getElementById("popup");
                _poptitle = document.getElementById("poptitle");
                centrePopUp();

                // show the relevant list of titles
                document.getElementById("refBibleSelector").style.display = "none";
                document.getElementById("refPoemSelector").style.display = "none";
                document.getElementById("refJokeSelector").style.display = "block";

        if (pop.style.display != "block")
        {
            pop.style.display = "block";
            btn.src = "images/add_a_joke_up.gif";
                        _poptitle.innerHTML = "Add a Joke";
        }
        else
        {
            pop.style.display = "none";
            btn.src = "images/add_a_joke.gif" ;
        }
}
function closePopup()
{
         btn = document.getElementById("btn_addBible");
                 btn1 = document.getElementById("btn_addPoem");
                 btn2 = document.getElementById("btn_addJoke");
         btn.src = "images/add_a_biblical_reference.gif";
                 btn1.src = "images/add_a_poem.gif";
                 btn2.src = "images/add_a_joke.gif";

                 // clear the selected reference
                 txt = document.getElementById("refSelected");
                 txt.value = "";

                 // reset the selections
                document.getElementById("refBibleSelector").value = "0";
                document.getElementById("refPoemSelector").value = "0";
                document.getElementById("refJokeSelector").value = "0";


         pop = document.getElementById("popup");
         pop.style.display = "none";
}
function centrePopUp()
{
        var pop = document.getElementById("popup");
        pop.style.width = popWidth + "px";
        pop.style.height = popHeight + "px";

        var proposedLeft= (pageWidth - popWidth) / 2;
    if (proposedLeft < 0) proposedLeft = 0;

        var proposedTop = (WindowHeight() - popHeight) / 2;
    if (proposedTop < 0) proposedTop = 0;

        pop.style.top = "60px";
//        pop.style.top = proposedTop + "px";   // option to centre vertically
    pop.style.left = proposedLeft + "px";
}
function WindowWidth()
{
        if (self.innerWidth) return self.innerWidth;
        else if (document.body && document.body.clientWidth) return document.body.clientWidth;
        else return 0;
}

function WindowHeight()
{
        if (self.innerHeight) return self.innerHeight;
        else if (document.body && document.body.clientHeight) return document.body.clientHeight;
        else return 0;
}