// md_script.js                               <!-- for Dokeos metadata/*.php -->
//                                                           <!-- 2005/08/01 -->

//   Copyright (C) 2005 rene.haentjens@UGent.be -  see metadata/md_funcs.php -->


// Part 1: General funcs & Keyword Tree: copied (with modifs) from SelKwds.xsl

        String.prototype.trim = function()
        {
            return this.replace(/^\s*/,"").replace(/\s*$/,""); // \f\n\r\t\v
        }   // Dave Anderson, dbforums.com/arch/195/2003/3/724117
        
        String.prototype.removeExtraSpaces = function()
        {
            return this.replace(/\s+/g, ' ').trim();
        }
        
        function makeWindow(url, htmlText)
        {
            var newWindow = window.open(url, '', 
                'toolbar=no, location=no, directories=no, status=yes, '+ 
                'menubar=yes, scrollbars=yes, resizable=yes, ' + 
                'width=800, height=600, left=10, top=10');
            if (url == '') newWindow.document.write('<html><body>' + 
                    htmlText + '</body></html>');
            return newWindow;
        }
        
        function isNotW3C()
        {
            if (!document.getElementById)
                alert('Sorry, the buttons only work with W3C browsers. ' +
                    'Use Moz1.7 or IE6 or NN7 or type in keywords manually...');
            return !document.getElementById;
        }
        
        
        function openOrCloseHelp(btn)
        {
            if (isNotW3C()) return false;
            
            document.getElementById('moreHelp').className =
                (btn.value == "?")              ? "dvo" : "dvc";
            btn.value = (btn.value == "?")      ?  "¿"  :  "?";
        }
        
        function hasTagAndClass(obj, tag, cl)
        {
            return obj.tagName && (obj.tagName.toUpperCase() == tag) && 
                (obj.className == cl);
        }
        
        
        function openOrClose(btn)  // show or hide part of keyword-tree
        {
            var oldcl = (btn.value == "-") ? "dvo" : "dvc";
            var newcl = (oldcl == "dvo")   ? "dvc" : "dvo";
            btn.value = (oldcl == "dvo")   ?  "+"  :  "-" ;
            
            var ch = btn.parentNode.childNodes;  // opera crashes on with()
            for (var i = 0; i < ch.length; i++)  // netscape requires .item
                if (hasTagAndClass(ch.item(i), 'DIV', oldcl))
                    ch.item(i).className = newcl;
        }
        
        function openOrCloseHere(div, wrong)  // show or hide recursively
        {
            var ch = div.childNodes;
            for (var i = 0; i < ch.length; i++)
            {
                var thisCh = ch.item(i);
                if (thisCh.className == 'btn' && thisCh.value == wrong)
                    openOrClose(thisCh)
                else if (thisCh.className == 'dvo' || thisCh.className == 'dvc')
                    openOrCloseHere(thisCh, wrong);
            }
        }
        
        function openOrCloseAll(btn)  // show or hide whole keyword-tree
        {
            if (isNotW3C()) return false;
            
            var wrong = (btn.value == "--") ? "-"  : "+" ;
            btn.value = (wrong == "-")      ? "++" : "--";
            
            openOrCloseHere(btn.parentNode, wrong);
        }
        
        
        var selspans = new Array;   // selected SPANs with keywords
        
        function deselect(span)
        {
            for (var s in selspans) if (selspans[s] == span) delete selspans[s];
        }
        
        function copyToClipboard(allKwds)  // md_script: not used
        {
            if (window.clipboardData)
            {
                window.clipboardData.setData("Text", '<' + allKwds + '>\r\n');
                return;
            }
            
            netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
            var gClipboardHelper = Components.classes['@mozilla.org/widget/clipboardhelper;1']
                .getService(Components.interfaces.nsIClipboardHelper);
            gClipboardHelper.copyString('<' + allKwds + '>\n');
        }
        
        function getSelectedKeywords()
        {
            var sortedKwds = new Array, allKwds = '';
            
            for (var s in selspans)
                sortedKwds.push(selspans[s].parentNode.getAttribute('level')
                     + '.' + selspans[s].innerHTML)
            
            sortedKwds.sort();  // according to level, which follows the tree
            
            for (var k in sortedKwds)
            {
                var someWords = sortedKwds[k];
                allKwds += ', ' + someWords.substr(someWords.indexOf('.')+1);
            }
            
            return allKwds.replace(/[,_\s]+/g, ', ').substr(2);  // strip ', '
        }
        
        
        var orkwds;  // array of ', kw, ' strings
        
        function selectOriginal(div)
        {
            var ch = div.childNodes;
            for (var i = 0; i < ch.length; i++)
            {
                var thisCh = ch.item(i); if (!thisCh.tagName) continue;
                thisTag = thisCh.tagName.toUpperCase();
                
                if (thisTag == 'SPAN')
                {
                    var parkwds = ','+ thisCh.innerHTML.replace(/\s*/g,"") +',';
                    
                    for (var k = 0; k < orkwds.length; k++)
                    if (parkwds.indexOf(orkwds[k]) >=0 )
                    {
                        deselect(thisCh); selspans.push(thisCh);
                        thisCh.className = "lbs"; 
                        
                        openToTop(div, div.className); break;
                    }
                }
                else if (thisTag == 'DIV')
                {
                    selectOriginal(thisCh);
                }
            }
        }
        
        function openToTop(div, divclass)
        {
            if (!div.parentNode) return; var pdiv = div.parentNode;
            
            if (!pdiv.className) return; var pclass = pdiv.className;
            if (pclass != 'dvo' && pclass != 'dvc') return;
            
            if (divclass == 'dvc')
            {
                var ch = pdiv.childNodes;
                for (var i = 0; i < ch.length; i++)
                {
                    var btn = ch.item(i);
                    if (hasTagAndClass(btn, 'INPUT', 'btn'))
                        if (btn.value == '+') openOrClose(btn);
                }
            }
            
            openToTop(pdiv, pclass);
        }
        
        function deselectAll(ev, btn)
        {
            if (isNotW3C()) return false;
            
        	if (!ev) var ev = window.event;
        	
            var kws = document.getElementById('kwds_string');
            
            for (var s in selspans) selspans[s].className = "lbl";
            selspans = new Array;
            
            document.getElementById('btnOpenOrCloseAll').value = "--";
            
            if (!ev.altKey) { kws.value = ''; return; }
            
            // md_script: calling HTML should define var kwdswere!
            // in SelKwds.xsl, they are   typed in by user or fetched from PPT
            
            var kwdsarray = kwdswere.split(','), allKwds = '';
            
            for (var k = 0; k < kwdsarray.length; k++)
            {
                var kwd = kwdsarray[k].trim();
                if (kwd.substr(0,1) == '-') kwd = kwd.substr(1);
                if (kwd != '') allKwds += '§,' + kwd + ',';
            }
            
            if (allKwds == '') return;
            
            orkwds = allKwds.substr(1).split('§');
            
            selectOriginal(btn.parentNode);
            
            allKwds = getSelectedKeywords(); kws.value = allKwds;
            // no copyToClipboard(allKwds);
            
            allKwds = ','+ allKwds.replace(/\s*/g,"") +','; var missing = '';
            for (k = 0; k < orkwds.length; k++)
            if (allKwds.indexOf(orkwds[k]) < 0 ) missing += orkwds[k];
            
            if (missing != '') alert('!= ' + missing.replace(/,+/g," "));
        }
        
        function selectOrDeselect(span, newcl)
        {
            span.className = newcl; deselect(span);
            if (newcl == "lbs") selspans.push(span);
        }
        
        function alsoParents(div, oldcl, newcl)
        {
            while (div.parentNode)
            {
                div = div.parentNode; var ch = div.childNodes;
                for (var i = 0; i < ch.length; i++)
                    if (hasTagAndClass(ch.item(i), 'SPAN', oldcl))
                        selectOrDeselect(ch.item(i), newcl);
            }
        }
        
        function spanClick(span, ev)  // md_script: no parents in search
        {
            var mda = getObj("mda");    if (!ev) ev = window.event;

            if (ev.shiftKey && ev.altKey)
            {
                makeWindow('', '<pre>' + span.parentNode.innerHTML
                    .replace(/&/g, "&amp;").replace(/"/g, "&quot;")
                    .replace(/</g, "&lt;") .replace(/>/g, "&gt;") + '</pre>');
                return;  // debugging...
            }
            
            if (ev.ctrlKey || span.className == "lbs")
            {
                selectOrDeselect(span, "lbl");  // deselect
                if (document.selection) document.selection.empty();
                if (ev.altKey) alsoParents(span.parentNode, "lbs", "lbl");
            }
            else
            {
                selectOrDeselect(span, "lbs");  // select (search: no parents)
                if (mda && !ev.altKey) alsoParents(span.parentNode, "lbl", "lbs");
                if (!mda && ev.altKey)  // mda does not exist in search form
                    if (span.innerHTML.substr(0, 1) == '-')
                         span.innerHTML = (', ' + span.innerHTML).replace(/, -/g, ", ").substr(2);
                    else span.innerHTML = (', ' + span.innerHTML).replace(/, /g, ", -").substr(2);
            }
            
            var allKwds = getSelectedKeywords(); // no copyToClipboard(allKwds);
            document.getElementById('kwds_string').value = allKwds;
        }
        
    
        var KWDS_ARRAY = new Array, nkw = 0, pU;  // alphabetic list popup
        
        function makeAlphaList(div)
        {
            var ch = div.childNodes;
            for (var i = 0; i < ch.length; i++)
            {
                var thisCh = ch.item(i); if (!thisCh.tagName) continue;
                thisTag = thisCh.tagName.toUpperCase();
                
                if (thisTag == 'SPAN')
                {
                    var parkwds= thisCh.innerHTML.replace(/\s*/g,"").split(',');
                    for (k in parkwds) KWDS_ARRAY[nkw++] = parkwds[k];
                }
                else if (thisTag == 'DIV') makeAlphaList(thisCh);
            }
        }
        
        function pU_show(anchor, offsetX, offsetY, defH)  // XY: rel. to anchor
        {
            if (!anchor) return;
            
            thisx = anchor.offsetLeft; thisy = anchor.offsetTop;
            
            while ((anchor = anchor.offsetParent))
            { 
                thisx += anchor.offsetLeft; thisy += anchor.offsetTop; 
            }
            
            thisx += offsetX; thisy += offsetY;
            
            pU.style.left = thisx + "px";
            pU.style.top =  thisy + "px";
            pU.style.height = defH; var maxH = pU.offsetHeight;
            for (var curH = 20; curH <= maxH; curH += 20)
            {
                pU.style.height = curH + 'px';
                if (curH >= pU.scrollHeight) break;
            }
            // scrollHeight can be smaller than current in IE, not in Moz
            pU.style.visibility = "visible";
        }
         
        function pU_hide()
        {
            if (pU) pU.style.visibility = "hidden";
        }
        
        function takeTypeIn(kws, oX, oY, defH)
        {
            if (isNotW3C()) return;
            
            if (!pU)
            {
                pU = document.getElementById('popup');
                makeAlphaList(document.getElementById('maindiv'));
                KWDS_ARRAY.sort();
            }
            
            var curValue = kws.value.toLowerCase(), kwLines = '';
            
            for (pos = 0; pos < KWDS_ARRAY.length; pos++)
                if (KWDS_ARRAY[pos].toLowerCase().indexOf(curValue) == 0)
                    kwLines += '<div class="pul" onMouseOver="this.className=' + 
                        "'lbl'" + '"; onMouseOut="this.className=' + "'pul'" + 
                        '">' + KWDS_ARRAY[pos] + '</div>';
            
            if (kwLines == '') {pU_hide(); return; }
            
            pU.innerHTML = kwLines; pU_show(kws, oX, oY, defH);
        }
        
        function pU_clicked(ev)
        {
            if (!pU) return false; if (!ev) var ev = window.event;
            
            var t = (ev.srcElement) ? ev.srcElement : ev.originalTarget;
            try {var kw = t.innerHTML;} catch(exc) {return false;}  // Moz
            
            while (true) try
            {
                if (t.id == pU.id) return kw ? kw : true; t = t.parentNode;
            } 
            catch(exc) {return false;}  // Moz: t.parentNode uncatched exc.
        }
        
        function pU_select(kw)
        {
            if (kw === true) return;
            
            var kws = document.getElementById('kwds_string');
            var maindiv = document.getElementById('maindiv');
            
            var ch = maindiv.childNodes;
            for (var i = 0; i < ch.length; i++)
            {
                var btn = ch.item(i);
                if (hasTagAndClass(btn, 'INPUT', 'btn'))
                    if (btn.value == '+') openOrClose(btn);
            }
            orkwds = new Array(',' + kw + ','); selectOriginal(maindiv);
            
            kws.value = getSelectedKeywords(); // no copyToClipboard(kws.value);
         
            pU_hide();
        }
        

// Part 2: Metadata Updates: W3C, IE4 and NS4 browsers

        function isValidChar(ev, pattern, flags)
        {
            // e.g. onKeyPress="return isValidChar(event, '[a-z]', 'i');"
            
            if (!ev) var ev = window.event;                 // PPK, see below
            var kc = (ev.keyCode) ? ev.keyCode : ev.which;  // PPK
            return (new RegExp(pattern, flags)).test(String.fromCharCode(kc));
            
            // PPK= Peter-Paul Koch, www.quirksmode.org
        }
            
        function checkValid(inputField, pattern, flags)
        {
            // e.g. onKeyUp="checkValid(this, '^[a-z]{2,8}$', 'i');"
            
            var fieldColor = (new RegExp(pattern, flags)).test(inputField.value) ? '#000000' : '#D8366C';
            var fieldStyle = (document.getElementById || document.all) ? 
                inputField.style : inputField;
        	if (fieldStyle) fieldStyle.color = fieldColor;
        	
        	// OK for all browsers (see devedge.netscape.com
        	//          /library/xref/2003/css-support/css1/mastergrid.html):
        	// color, background-color (not on NN4), display block/none (NN4?),
        	// overflow hidden/scroll/auto (not on NN4),
        	// position relative/static, 
        	// text-align left/right/center, text-indent,
        	// font-style normal/italic, font-weight normal/bold,
        	// font-family serif/sans-serif/monospace,
        	// border-style none/solid/double/groove/ridge/inset/outset.
        }
        
        function getObj(name)  // PPK
        {
            return (document.getElementById) ? document.getElementById(name)
            : (document.all) ?                 document.all[name]        // IE4
        	: (document.layers) ?              document.layers[name]     // NS4
        	: null;  // With NS4, nested layers are not supported!
        }
        
        function spc(path, value)  // set pending change in form field mda
        {
        	var mda = getObj("mda");
        	if (mda) mda.value += "\n" + path + '=' + value;
        }
        
        function spcSel(path, selbox)  // set pending change, language selection
        {
        	var mda = getObj("mda");
        	if (mda) mda.value += "\n" + path + '=' + 
        	    selbox.options[selbox.selectedIndex].value;
        }
        
        function checkBeforeSubmit(ev)
        {
        	if (!ev) var ev = window.event;
        	
            if (ev.ctrlKey && ev.altKey)
            {
                var mdt = getObj("mdt"); if (!mdt) return false;
                
                makeWindow('', '<pre>' + 
                    ('<?xml version="1.0" encoding="UTF-16"?>' + 
                     '  <!-- From browser, save as Text/Unicode -->\n\n' + 
                     mdt.value)
                        .replace(/&/g, '&amp;').replace(/"/g, '&quot;')
                        .replace(/</g, '&lt;').replace(/>/g, '&gt;') + 
                    '</pre>');
                return false;
            }
            
        	var kwdsnow = getObj("kwds_string"); if (!kwdsnow) return true;
        	if (kwdsnow.value == kwdswere) return true;  // unchanged
        	// note: calling HTML should define var kwdswere!
        	
        	var language = kwdsnow.title;
        	
        	var mda = getObj("mda");
        	if (!mda) { alert('? Form does not contain mda'); return false; }
        	
        	var kwdsarray = kwdswere.split(',');
        	
        	for (var k = 0; k < kwdsarray.length; k++)  // delete old
        	    if (kwdsarray[k].trim() != '') 
                	mda.value += "\nmetadata/lom/general/keyword[-1]~";
        	
        	kwdsarray = kwdsnow.value.split(',');
        	
        	for (k = 0; k < kwdsarray.length; k++)
        	{
            	var newkw = kwdsarray[k].trim();
            	if (newkw != '') mda.value += 
            	    "\nmetadata/lom/general!keyword" + 
            	    "\nmetadata/lom/general/keyword[-1]!string=" + newkw + 
            	    "\nmetadata/lom/general/keyword[-1]/string/@language=" + language;
            }
        	
        	return true;
       	
        }
        
        function setPendingOperation(op, ev)
        {
        	if (!ev) var ev = window.event;
        	
        	var mda = getObj("mda");
        	if (!mda) { alert('? Form does not contain mda'); return false; }
        	
        	if (op == '!!' || (op == '~~' && confirm(mda.title)))
        	{
            	mda.value = op; return true;
        	}
        	
        	return false;
        }
        
        function prepSearch(ev)
        {
        	if (!ev) var ev = window.event;
        	
        	var mdsc = getObj("mdsc");
        	if (!mdsc) { alert('? Form does not contain mdsc'); return false; }
            
        	var kwdsnow = getObj("kwds_string"); if (!kwdsnow) return true;
        	if (kwdsnow.value == '') return true;
        	
        	var kwdsarray = kwdsnow.value.split(',');
        	
        	for (var k = 0; k < kwdsarray.length; k++)
        	{
            	var newkw = kwdsarray[k].trim();
            	if (newkw != '') mdsc.value += "\n" + newkw + '-kw';
            }
        	
        	return true;
        }


// The End