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go/doc/talks/slidy.js

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/* http://www.w3.org/Talks/Tools/Slidy/slidy.js
Copyright (c) 2005 W3C (MIT, ERCIM, Keio), All Rights Reserved.
W3C liability, trademark, document use and software licensing
rules apply, see:
http://www.w3.org/Consortium/Legal/copyright-documents
http://www.w3.org/Consortium/Legal/copyright-software
*/
var ns_pos = (typeof window.pageYOffset!='undefined');
var khtml = ((navigator.userAgent).indexOf("KHTML") >= 0 ? true : false);
var opera = ((navigator.userAgent).indexOf("Opera") >= 0 ? true : false);
var ie7 = (!ns_pos && navigator.userAgent.indexOf("MSIE 7") != -1);
window.onload = startup; // equivalent to onload on body element
// IE only event handlers to ensure all slides are printed
// I don't yet know how to emulate these for other browsers
window.onbeforeprint = beforePrint;
window.onafterprint = afterPrint;
// hack to hide slides while loading
setTimeout(hideAll, 50);
function hideAll()
{
if (document.body)
document.body.style.visibility = "hidden";
else
setTimeout(hideAll, 50);
}
var slidenum = 0; // integer slide count: 0, 1, 2, ...
var slides; // set to array of slide div's
var slideNumElement; // element containing slide number
var notes; // set to array of handout div's
var backgrounds; // set to array of background div's
var toolbar; // element containing toolbar
var title; // document title
var lastShown = null; // last incrementally shown item
var eos = null; // span element for end of slide indicator
var toc = null; // table of contents
var outline = null; // outline element with the focus
var selectedTextLen; // length of drag selection on document
var viewAll = 0; // 1 to view all slides + handouts
var wantToolbar = 1; // 0 if toolbar isn't wanted
var mouseClickEnabled = true; // enables left click for next slide
var scrollhack = 0; // IE work around for position: fixed
var helpAnchor; // used for keyboard focus hack in showToolbar()
var helpPage = "http://www.w3.org/Talks/Tools/Slidy/help.html";
var helpText = "Navigate with mouse click, space bar, Cursor Left/Right, " +
"or Pg Up and Pg Dn. Use S and B to change font size.";
var sizeIndex = 0;
var sizeAdjustment = 0;
var sizes = new Array("10pt", "12pt", "14pt", "16pt", "18pt", "20pt",
"22pt", "24pt", "26pt", "28pt", "30pt", "32pt");
var okayForIncremental = incrementalElementList();
// needed for efficient resizing
var lastWidth = 0;
var lastHeight = 0;
// Needed for cross browser support for relative width/height on
// object elements. The work around is to save width/height attributes
// and then to recompute absolute width/height dimensions on resizing
var objects;
// updated to language specified by html file
var lang = "en";
//var localize = {};
// for each language there is an associative array
var strings_es = {
"slide":"pág.",
"help?":"Ayuda",
"contents?":"Índice",
"table of contents":"tabla de contenidos",
"Table of Contents":"Tabla de Contenidos",
"restart presentation":"Reiniciar presentación",
"restart?":"Inicio"
};
strings_es[helpText] =
"Utilice el ratón, barra espaciadora, teclas Izda/Dhca, " +
"o Re pág y Av pág. Use S y B para cambiar el tamaño de fuente.";
var strings_nl = {
"slide":"pagina",
"help?":"Help?",
"contents?":"Inhoud?",
"table of contents":"inhoudsopgave",
"Table of Contents":"Inhoudsopgave",
"restart presentation":"herstart presentatie",
"restart?":"Herstart?"
};
strings_nl[helpText] =
"Navigeer d.m.v. het muis, spatiebar, Links/Rechts toetsen, " +
"of PgUp en PgDn. Gebruik S en B om de karaktergrootte te veranderen.";
var strings_de = {
"slide":"Seite",
"help?":"Hilfe",
"contents?":"Übersicht",
"table of contents":"Inhaltsverzeichnis",
"Table of Contents":"Inhaltsverzeichnis",
"restart presentation":"Präsentation neu starten",
"restart?":"Neustart"
};
strings_de[helpText] =
"Benutzen Sie die Maus, Leerschlag, die Cursortasten links/rechts" +
"oder Page up/Page Down zum Wechseln der Seiten und S und B für die Schriftgrösse.";
var strings_pl = {
"slide":"slajd",
"help?":"pomoc?",
"contents?":"spis treści?",
"table of contents":"spis treści",
"Table of Contents":"Spis Treści",
"restart presentation":"Restartuj prezentację",
"restart?":"restart?"
};
strings_pl[helpText] =
"Zmieniaj slajdy klikając myszą, naciskając spację, strzałki lewo/prawo" +
"lub PgUp / PgDn. Użyj klawiszy S i B, aby zmienić rozmiar czczionki.";
var strings_fr = {
"slide":"page",
"help?":"Aide",
"contents?":"Index",
"table of contents":"table des matières",
"Table of Contents":"Table des matières",
"restart presentation":"Recommencer l'exposé",
"restart?":"Début"
};
strings_fr[helpText] =
    "Naviguez avec la souris, la barre d'espace, les flèches" +
"gauche/droite ou les touches Pg Up, Pg Dn. Utilisez " +
    "les touches S et B pour modifier la taille de la police.";
var strings_hu = {
"slide":"oldal",
"help?":"segítség",
"contents?":"tartalom",
"table of contents":"tartalomjegyzék",
"Table of Contents":"Tartalomjegyzék",
"restart presentation":"bemutató újraindítása",
"restart?":"újraindítás"
};
strings_hu[helpText] =
"Az oldalak közti lépkedéshez kattintson az egérrel, vagy használja a szóköz, a bal, vagy a jobb nyíl, " +
"illetve a Page Down, Page Up billentyűket. Az S és a B billentyűkkel változtathatja a szöveg méretét.";
var strings_it = {
"slide":"pag.",
"help?":"Aiuto",
"contents?":"Indice",
"table of contents":"indice",
"Table of Contents":"Indice",
"restart presentation":"Ricominciare la presentazione",
"restart?":"Inizio"
};
strings_it[helpText] =
"Navigare con mouse, barra spazio, frecce sinistra/destra o " +
"PgUp e PgDn. Usare S e B per cambiare la dimensione dei caratteri.";
var strings_el = {
"slide":"σελίδα",
"help?":"βοήθεια;",
"contents?":"περιεχόμενα;",
"table of contents":"πίνακας περιεχομένων",
"Table of Contents":"Πίνακας Περιεχομένων",
"restart presentation":"επανεκκίνηση παρουσίασης",
"restart?":"επανεκκίνηση;"
};
strings_el[helpText] =
"Πλοηγηθείτε με το κλίκ του ποντικιού, το space, τα βέλη αριστερά/δεξιά, " +
"ή Page Up και Page Down. Χρησιμοποιήστε τα πλήκτρα S και B για να αλλάξετε " +
"το μέγεθος της γραμματοσειράς.";
var strings_ja = {
"slide":"スライド",
"help?":"ヘルプ",
"contents?":"目次",
"table of contents":"目次を表示",
"Table of Contents":"目次",
"restart presentation":"最初から再生",
"restart?":"最初から"
};
strings_ja[helpText] =
"マウス左クリック ・ スペース ・ 左右キー " +
"または Page Up ・ Page Downで操作 S ・ Bでフォントサイズ変更";
// each such language array is declared in the localize array
// used indirectly as in help.innerHTML = "help".localize();
var localize = {
"es":strings_es,
"nl":strings_nl,
"de":strings_de,
"pl":strings_pl,
"fr":strings_fr,
"hu":strings_hu,
"it":strings_it,
"el":strings_el,
"jp":strings_ja
};
/* general initialization */
function startup()
{
// find human language from html element
// for use in localizing strings
lang = document.body.parentNode.getAttribute("lang");
if (!lang)
lang = document.body.parentNode.getAttribute("xml:lang");
if (!lang)
lang = "en";
document.body.style.visibility = "visible";
title = document.title;
toolbar = addToolbar();
wrapImplicitSlides();
slides = collectSlides();
notes = collectNotes();
objects = document.body.getElementsByTagName("object");
backgrounds = collectBackgrounds();
patchAnchors();
slidenum = findSlideNumber(location.href);
window.offscreenbuffering = true;
sizeAdjustment = findSizeAdjust();
hideImageToolbar(); // suppress IE image toolbar popup
initOutliner(); // activate fold/unfold support
if (slides.length > 0)
{
var slide = slides[slidenum];
slide.style.position = "absolute";
if (slidenum > 0)
{
setVisibilityAllIncremental("visible");
lastShown = previousIncrementalItem(null);
setEosStatus(true);
}
else
{
lastShown = null;
setVisibilityAllIncremental("hidden");
setEosStatus(!nextIncrementalItem(lastShown));
}
setLocation();
}
toc = tableOfContents();
hideTableOfContents();
// bind event handlers
document.onclick = mouseButtonClick;
document.onmouseup = mouseButtonUp;
document.onkeydown = keyDown;
window.onresize = resized;
window.onscroll = scrolled;
singleSlideView();
setLocation();
resized();
if (ie7)
setTimeout("ieHack()", 100);
showToolbar();
}
// add localize method to all strings for use
// as in help.innerHTML = "help".localize();
String.prototype.localize = function()
{
if (this == "")
return this;
// try full language code, e.g. en-US
var s, lookup = localize[lang];
if (lookup)
{
s = lookup[this];
if (s)
return s;
}
// try en if undefined for en-US
var lg = lang.split("-");
if (lg.length > 1)
{
lookup = localize[lg[0]];
if (lookup)
{
s = lookup[this];
if (s)
return s;
}
}
// otherwise string as is
return this;
}
// suppress IE's image toolbar pop up
function hideImageToolbar()
{
if (!ns_pos)
{
var images = document.getElementsByTagName("IMG");
for (var i = 0; i < images.length; ++i)
images[i].setAttribute("galleryimg", "no");
}
}
// hack to persuade IE to compute correct document height
// as needed for simulating fixed positioning of toolbar
function ieHack()
{
window.resizeBy(0,-1);
window.resizeBy(0, 1);
}
// Firefox reload SVG bug work around
function reload(e)
{
if (!e)
var e = window.event;
hideBackgrounds();
setTimeout("document.reload();", 100);
stopPropagation(e);
e.cancel = true;
e.returnValue = false;
return false;
}
// Safari and Konqueror don't yet support getComputedStyle()
// and they always reload page when location.href is updated
function isKHTML()
{
var agent = navigator.userAgent;
return (agent.indexOf("KHTML") >= 0 ? true : false);
}
function resized()
{
var width = 0;
if ( typeof( window.innerWidth ) == 'number' )
width = window.innerWidth; // Non IE browser
else if (document.documentElement && document.documentElement.clientWidth)
width = document.documentElement.clientWidth; // IE6
else if (document.body && document.body.clientWidth)
width = document.body.clientWidth; // IE4
var height = 0;
if ( typeof( window.innerHeight ) == 'number' )
height = window.innerHeight; // Non IE browser
else if (document.documentElement && document.documentElement.clientHeight)
height = document.documentElement.clientHeight; // IE6
else if (document.body && document.body.clientHeight)
height = document.body.clientHeight; // IE4
if (height && (width/height > 1.05*1024/768))
{
width = height * 1024.0/768;
}
// IE fires onresize even when only font size is changed!
// so we do a check to avoid blocking < and > actions
if (width != lastWidth || height != lastHeight)
{
if (width >= 1100)
sizeIndex = 5; // 4
else if (width >= 1000)
sizeIndex = 4; // 3
else if (width >= 800)
sizeIndex = 3; // 2
else if (width >= 600)
sizeIndex = 2; // 1
else if (width)
sizeIndex = 0;
// add in font size adjustment from meta element e.g.
// <meta name="font-size-adjustment" content="-2" />
// useful when slides have too much content ;-)
if (0 <= sizeIndex + sizeAdjustment &&
sizeIndex + sizeAdjustment < sizes.length)
sizeIndex = sizeIndex + sizeAdjustment;
// enables cross browser use of relative width/height
// on object elements for use with SVG and Flash media
adjustObjectDimensions(width, height);
document.body.style.fontSize = sizes[sizeIndex];
lastWidth = width;
lastHeight = height;
// force reflow to work around Mozilla bug
//if (ns_pos)
{
var slide = slides[slidenum];
hideSlide(slide);
showSlide(slide);
}
// force correct positioning of toolbar
refreshToolbar(200);
}
}
function scrolled()
{
if (toolbar && !ns_pos && !ie7)
{
hackoffset = scrollXOffset();
// hide toolbar
toolbar.style.display = "none";
// make it reappear later
if (scrollhack == 0 && !viewAll)
{
setTimeout(showToolbar, 1000);
scrollhack = 1;
}
}
}
// used to ensure IE refreshes toolbar in correct position
function refreshToolbar(interval)
{
if (!ns_pos && !ie7)
{
hideToolbar();
setTimeout(showToolbar, interval);
}
}
// restores toolbar after short delay
function showToolbar()
{
if (wantToolbar)
{
if (!ns_pos)
{
// adjust position to allow for scrolling
var xoffset = scrollXOffset();
toolbar.style.left = xoffset;
toolbar.style.right = xoffset;
// determine vertical scroll offset
//var yoffset = scrollYOffset();
// bottom is doc height - window height - scroll offset
//var bottom = documentHeight() - lastHeight - yoffset
//if (yoffset > 0 || documentHeight() > lastHeight)
// bottom += 16; // allow for height of scrollbar
toolbar.style.bottom = 0; //bottom;
}
toolbar.style.display = "block";
toolbar.style.visibility = "visible";
}
scrollhack = 0;
// set the keyboard focus to the help link on the
// toolbar to ensure that document has the focus
// IE doesn't always work with window.focus()
// and this hack has benefit of Enter for help
try
{
if (!opera)
helpAnchor.focus();
}
catch (e)
{
}
}
function test()
{
var s = "docH: " + documentHeight() +
" winH: " + lastHeight +
" yoffset: " + scrollYOffset() +
" toolbot: " + (documentHeight() - lastHeight - scrollYOffset());
//alert(s);
var slide = slides[slidenum];
// IE getAttribute requires "class" to be "className"
var name = ns_pos ? "class" : "className";
var style = (slide.currentStyle ? slide.currentStyle["backgroundColor"] :
document.defaultView.getComputedStyle(slide, '').getPropertyValue("background-color"));
alert("class='" + slide.getAttribute(name) + "' backgroundColor: " + style);
}
function hideToolbar()
{
toolbar.style.display = "none";
toolbar.style.visibility = "hidden";
window.focus();
}
// invoked via F key
function toggleToolbar()
{
if (!viewAll)
{
if (toolbar.style.display == "none")
{
toolbar.style.display = "block";
toolbar.style.visibility = "visible";
wantToolbar = 1;
}
else
{
toolbar.style.display = "none";
toolbar.style.visibility = "hidden";
wantToolbar = 0;
}
}
}
function scrollXOffset()
{
if (window.pageXOffset)
return self.pageXOffset;
if (document.documentElement &&
document.documentElement.scrollLeft)
return document.documentElement.scrollLeft;
if (document.body)
return document.body.scrollLeft;
return 0;
}
function scrollYOffset()
{
if (window.pageYOffset)
return self.pageYOffset;
if (document.documentElement &&
document.documentElement.scrollTop)
return document.documentElement.scrollTop;
if (document.body)
return document.body.scrollTop;
return 0;
}
// looking for a way to determine height of slide content
// the slide itself is set to the height of the window
function optimizeFontSize()
{
var slide = slides[slidenum];
//var dh = documentHeight(); //getDocHeight(document);
var dh = slide.scrollHeight;
var wh = getWindowHeight();
var u = 100 * dh / wh;
alert("window utilization = " + u + "% (doc "
+ dh + " win " + wh + ")");
}
function getDocHeight(doc) // from document object
{
if (!doc)
doc = document;
if (doc && doc.body && doc.body.offsetHeight)
return doc.body.offsetHeight; // ns/gecko syntax
if (doc && doc.body && doc.body.scrollHeight)
return doc.body.scrollHeight;
alert("couldn't determine document height");
}
function getWindowHeight()
{
if ( typeof( window.innerHeight ) == 'number' )
return window.innerHeight; // Non IE browser
if (document.documentElement && document.documentElement.clientHeight)
return document.documentElement.clientHeight; // IE6
if (document.body && document.body.clientHeight)
return document.body.clientHeight; // IE4
}
function documentHeight()
{
var sh, oh;
sh = document.body.scrollHeight;
oh = document.body.offsetHeight;
if (sh && oh)
{
return (sh > oh ? sh : oh);
}
// no idea!
return 0;
}
function smaller()
{
if (sizeIndex > 0)
{
--sizeIndex;
}
toolbar.style.display = "none";
document.body.style.fontSize = sizes[sizeIndex];
var slide = slides[slidenum];
hideSlide(slide);
showSlide(slide);
setTimeout(showToolbar, 300);
}
function bigger()
{
if (sizeIndex < sizes.length - 1)
{
++sizeIndex;
}
toolbar.style.display = "none";
document.body.style.fontSize = sizes[sizeIndex];
var slide = slides[slidenum];
hideSlide(slide);
showSlide(slide);
setTimeout(showToolbar, 300);
}
// enables cross browser use of relative width/height
// on object elements for use with SVG and Flash media
// with thanks to Ivan Herman for the suggestion
function adjustObjectDimensions(width, height)
{
for( var i = 0; i < objects.length; i++ )
{
var obj = objects[i];
var mimeType = obj.getAttribute("type");
if (mimeType == "image/svg+xml" || mimeType == "application/x-shockwave-flash")
{
if ( !obj.initialWidth )
obj.initialWidth = obj.getAttribute("width");
if ( !obj.initialHeight )
obj.initialHeight = obj.getAttribute("height");
if ( obj.initialWidth && obj.initialWidth.charAt(obj.initialWidth.length-1) == "%" )
{
var w = parseInt(obj.initialWidth.slice(0, obj.initialWidth.length-1));
var newW = width * (w/100.0);
obj.setAttribute("width",newW);
}
if ( obj.initialHeight && obj.initialHeight.charAt(obj.initialHeight.length-1) == "%" )
{
var h = parseInt(obj.initialHeight.slice(0, obj.initialHeight.length-1));
var newH = height * (h/100.0);
obj.setAttribute("height", newH);
}
}
}
}
function cancel(event)
{
if (event)
{
event.cancel = true;
event.returnValue = false;
if (event.preventDefault)
event.preventDefault();
}
return false;
}
// See e.g. http://www.quirksmode.org/js/events/keys.html for keycodes
function keyDown(event)
{
var key;
if (!event)
var event = window.event;
// kludge around NS/IE differences
if (window.event)
key = window.event.keyCode;
else if (event.which)
key = event.which;
else
return true; // Yikes! unknown browser
// ignore event if key value is zero
// as for alt on Opera and Konqueror
if (!key)
return true;
// check for concurrent control/command/alt key
// but are these only present on mouse events?
if (event.ctrlKey || event.altKey || event.metaKey)
return true;
// dismiss table of contents if visible
if (isShownToc() && key != 9 && key != 16 && key != 38 && key != 40)
{
hideTableOfContents();
if (key == 27 || key == 84 || key == 67)
return cancel(event);
}
if (key == 34) // Page Down
{
nextSlide(false);
return cancel(event);
}
else if (key == 33) // Page Up
{
previousSlide(false);
return cancel(event);
}
else if (key == 32) // space bar
{
nextSlide(true);
return cancel(event);
}
else if (key == 37 || key == 38) // Left arrow || Up arrow
{
previousSlide(!event.shiftKey);
return cancel(event);
}
else if (key == 36) // Home
{
firstSlide();
return cancel(event);
}
else if (key == 35) // End
{
lastSlide();
return cancel(event);
}
else if (key == 39 || key == 40) // Right arrow || Down arrow
{
nextSlide(!event.shiftKey);
return cancel(event);
}
else if (key == 13) // Enter
{
if (outline)
{
if (outline.visible)
fold(outline);
else
unfold(outline);
return cancel(event);
}
}
else if (key == 188) // < for smaller fonts
{
smaller();
return cancel(event);
}
else if (key == 190) // > for larger fonts
{
bigger();
return cancel(event);
}
else if (key == 189 || key == 109) // - for smaller fonts
{
smaller();
return cancel(event);
}
else if (key == 187 || key == 191 || key == 107) // = + for larger fonts
{
bigger();
return cancel(event);
}
else if (key == 83) // S for smaller fonts
{
smaller();
return cancel(event);
}
else if (key == 66) // B for larger fonts
{
bigger();
return cancel(event);
}
else if (key == 90) // Z for last slide
{
lastSlide();
return cancel(event);
}
else if (key == 70) // F for toggle toolbar
{
toggleToolbar();
return cancel(event);
}
else if (key == 65) // A for toggle view single/all slides
{
toggleView();
return cancel(event);
}
else if (key == 75) // toggle action of left click for next page
{
mouseClickEnabled = !mouseClickEnabled;
alert((mouseClickEnabled ? "enabled" : "disabled") + " mouse click advance");
return cancel(event);
}
else if (key == 84 || key == 67) // T or C for table of contents
{
if (toc)
showTableOfContents();
return cancel(event);
}
else if (key == 72) // H for help
{
window.location = helpPage;
return cancel(event);
}
//else if (key == 93) // Windows menu key
//alert("lastShown is " + lastShown);
//else alert("key code is "+ key);
return true;
}
// make note of length of selected text
// as this evaluates to zero in click event
function mouseButtonUp(e)
{
selectedTextLen = getSelectedText().length;
}
// right mouse button click is reserved for context menus
// it is more reliable to detect rightclick than leftclick
function mouseButtonClick(e)
{
var rightclick = false;
var leftclick = false;
var middleclick = false;
var target;
if (!e)
var e = window.event;
if (e.target)
target = e.target;
else if (e.srcElement)
target = e.srcElement;
// work around Safari bug
if (target.nodeType == 3)
target = target.parentNode;
if (e.which) // all browsers except IE
{
leftclick = (e.which == 1);
middleclick = (e.which == 2);
rightclick = (e.which == 3);
}
else if (e.button)
{
// Konqueror gives 1 for left, 4 for middle
// IE6 gives 0 for left and not 1 as I expected
if (e.button == 4)
middleclick = true;
// all browsers agree on 2 for right button
rightclick = (e.button == 2);
}
else leftclick = true;
// dismiss table of contents
hideTableOfContents();
if (selectedTextLen > 0)
{
stopPropagation(e);
e.cancel = true;
e.returnValue = false;
return false;
}
// check if target is something that probably want's clicks
// e.g. embed, object, input, textarea, select, option
if (mouseClickEnabled && leftclick &&
target.nodeName != "EMBED" &&
target.nodeName != "OBJECT" &&
target.nodeName != "INPUT" &&
target.nodeName != "TEXTAREA" &&
target.nodeName != "SELECT" &&
target.nodeName != "OPTION")
{
nextSlide(true);
stopPropagation(e);
e.cancel = true;
e.returnValue = false;
}
}
function previousSlide(incremental)
{
if (!viewAll)
{
var slide;
if ((incremental || slidenum == 0) && lastShown != null)
{
lastShown = hidePreviousItem(lastShown);
setEosStatus(false);
}
else if (slidenum > 0)
{
slide = slides[slidenum];
hideSlide(slide);
slidenum = slidenum - 1;
slide = slides[slidenum];
setVisibilityAllIncremental("visible");
lastShown = previousIncrementalItem(null);
setEosStatus(true);
showSlide(slide);
}
setLocation();
if (!ns_pos)
refreshToolbar(200);
}
}
function nextSlide(incremental)
{
if (!viewAll)
{
var slide, last = lastShown;
if (incremental || slidenum == slides.length - 1)
lastShown = revealNextItem(lastShown);
if ((!incremental || lastShown == null) && slidenum < slides.length - 1)
{
slide = slides[slidenum];
hideSlide(slide);
slidenum = slidenum + 1;
slide = slides[slidenum];
lastShown = null;
setVisibilityAllIncremental("hidden");
showSlide(slide);
}
else if (!lastShown)
{
if (last && incremental)
lastShown = last;
}
setLocation();
setEosStatus(!nextIncrementalItem(lastShown));
if (!ns_pos)
refreshToolbar(200);
}
}
// to first slide with nothing revealed
// i.e. state at start of presentation
function firstSlide()
{
if (!viewAll)
{
var slide;
if (slidenum != 0)
{
slide = slides[slidenum];
hideSlide(slide);
slidenum = 0;
slide = slides[slidenum];
lastShown = null;
setVisibilityAllIncremental("hidden");
showSlide(slide);
}
setEosStatus(!nextIncrementalItem(lastShown));
setLocation();
}
}
// to last slide with everything revealed
// i.e. state at end of presentation
function lastSlide()
{
if (!viewAll)
{
var slide;
lastShown = null; //revealNextItem(lastShown);
if (lastShown == null && slidenum < slides.length - 1)
{
slide = slides[slidenum];
hideSlide(slide);
slidenum = slides.length - 1;
slide = slides[slidenum];
setVisibilityAllIncremental("visible");
lastShown = previousIncrementalItem(null);
showSlide(slide);
}
else
{
setVisibilityAllIncremental("visible");
lastShown = previousIncrementalItem(null);
}
setEosStatus(true);
setLocation();
}
}
function setEosStatus(state)
{
if (eos)
eos.style.color = (state ? "rgb(240,240,240)" : "red");
}
function showSlide(slide)
{
syncBackground(slide);
window.scrollTo(0,0);
slide.style.visibility = "visible";
slide.style.display = "block";
}
function hideSlide(slide)
{
slide.style.visibility = "hidden";
slide.style.display = "none";
}
function beforePrint()
{
showAllSlides();
hideToolbar();
}
function afterPrint()
{
if (!viewAll)
{
singleSlideView();
showToolbar();
}
}
function printSlides()
{
beforePrint();
window.print();
afterPrint();
}
function toggleView()
{
if (viewAll)
{
singleSlideView();
showToolbar();
viewAll = 0;
}
else
{
showAllSlides();
hideToolbar();
viewAll = 1;
}
}
// prepare for printing
function showAllSlides()
{
var slide;
for (var i = 0; i < slides.length; ++i)
{
slide = slides[i];
slide.style.position = "relative";
slide.style.borderTopStyle = "solid";
slide.style.borderTopWidth = "thin";
slide.style.borderTopColor = "black";
try {
if (i == 0)
slide.style.pageBreakBefore = "avoid";
else
slide.style.pageBreakBefore = "always";
}
catch (e)
{
//do nothing
}
setVisibilityAllIncremental("visible");
showSlide(slide);
}
var note;
for (var i = 0; i < notes.length; ++i)
{
showSlide(notes[i]);
}
// no easy way to render background under each slide
// without duplicating the background divs for each slide
// therefore hide backgrounds to avoid messing up slides
hideBackgrounds();
}
// restore after printing
function singleSlideView()
{
var slide;
for (var i = 0; i < slides.length; ++i)
{
slide = slides[i];
slide.style.position = "absolute";
if (i == slidenum)
{
slide.style.borderStyle = "none";
showSlide(slide);
}
else
{
slide.style.borderStyle = "none";
hideSlide(slide);
}
}
setVisibilityAllIncremental("visible");
lastShown = previousIncrementalItem(null);
var note;
for (var i = 0; i < notes.length; ++i)
{
hideSlide(notes[i]);
}
}
// the string str is a whitespace separated list of tokens
// test if str contains a particular token, e.g. "slide"
function hasToken(str, token)
{
if (str)
{
// define pattern as regular expression
var pattern = /\w+/g;
// check for matches
// place result in array
var result = str.match(pattern);
// now check if desired token is present
for (var i = 0; i < result.length; i++)
{
if (result[i] == token)
return true;
}
}
return false;
}
function getClassList(element)
{
if (typeof window.pageYOffset =='undefined')
return element.getAttribute("className");
return element.getAttribute("class");
}
function hasClass(element, name)
{
var regexp = new RegExp("(^| )" + name + "\W*");
if (regexp.test(getClassList(element)))
return true;
return false;
}
function removeClass(element, name)
{
// IE getAttribute requires "class" to be "className"
var clsname = ns_pos ? "class" : "className";
var clsval = element.getAttribute(clsname);
var regexp = new RegExp("(^| )" + name + "\W*");
if (clsval)
{
clsval = clsval.replace(regexp, "");
element.setAttribute(clsname, clsval);
}
}
function addClass(element, name)
{
if (!hasClass(element, name))
{
// IE getAttribute requires "class" to be "className"
var clsname = ns_pos ? "class" : "className";
var clsval = element.getAttribute(clsname);
element.setAttribute(clsname, (clsval ? clsval + " " + name : name));
}
}
// wysiwyg editors make it hard to use div elements
// e.g. amaya loses the div when you copy and paste
// this function wraps div elements around implicit
// slides which start with an h1 element and continue
// up to the next heading or div element
function wrapImplicitSlides()
{
var i, heading, node, next, div;
var headings = document.getElementsByTagName("h1");
if (!headings)
return;
for (i = 0; i < headings.length; ++i)
{
heading = headings[i];
if (heading.parentNode != document.body)
continue;
node = heading.nextSibling;
div = document.createElement("div");
div.setAttribute((ns_pos ? "class" : "className"), "slide");
document.body.replaceChild(div, heading);
div.appendChild(heading);
while (node)
{
if (node.nodeType == 1 && // an element
(node.nodeName == "H1" ||
node.nodeName == "h1" ||
node.nodeName == "DIV" ||
node.nodeName == "div"))
break;
next = node.nextSibling;
node = document.body.removeChild(node);
div.appendChild(node);
node = next;
}
}
}
// return new array of all slides
function collectSlides()
{
var slides = new Array();
var divs = document.body.getElementsByTagName("div");
for (var i = 0; i < divs.length; ++i)
{
div = divs.item(i);
if (hasClass(div, "slide"))
{
// add slide to collection
slides[slides.length] = div;
// hide each slide as it is found
div.style.display = "none";
div.style.visibility = "hidden";
// add dummy <br/> at end for scrolling hack
var node1 = document.createElement("br");
div.appendChild(node1);
var node2 = document.createElement("br");
div.appendChild(node2);
}
else if (hasClass(div, "background"))
{ // work around for Firefox SVG reload bug
// which otherwise replaces 1st SVG graphic with 2nd
div.style.display = "block";
}
}
return slides;
}
// return new array of all <div class="handout">
function collectNotes()
{
var notes = new Array();
var divs = document.body.getElementsByTagName("div");
for (var i = 0; i < divs.length; ++i)
{
div = divs.item(i);
if (hasClass(div, "handout"))
{
// add slide to collection
notes[notes.length] = div;
// hide handout notes as they are found
div.style.display = "none";
div.style.visibility = "hidden";
}
}
return notes;
}
// return new array of all <div class="background">
// including named backgrounds e.g. class="background titlepage"
function collectBackgrounds()
{
var backgrounds = new Array();
var divs = document.body.getElementsByTagName("div");
for (var i = 0; i < divs.length; ++i)
{
div = divs.item(i);
if (hasClass(div, "background"))
{
// add slide to collection
backgrounds[backgrounds.length] = div;
// hide named backgrounds as they are found
// e.g. class="background epilog"
if (getClassList(div) != "background")
{
div.style.display = "none";
div.style.visibility = "hidden";
}
}
}
return backgrounds;
}
// show just the backgrounds pertinent to this slide
function syncBackground(slide)
{
var background;
var bgColor;
if (slide.currentStyle)
bgColor = slide.currentStyle["backgroundColor"];
else if (document.defaultView)
{
var styles = document.defaultView.getComputedStyle(slide,null);
if (styles)
bgColor = styles.getPropertyValue("background-color");
else // broken implementation probably due Safari or Konqueror
{
//alert("defective implementation of getComputedStyle()");
bgColor = "transparent";
}
}
else
bgColor == "transparent";
if (bgColor == "transparent")
{
var slideClass = getClassList(slide);
for (var i = 0; i < backgrounds.length; i++)
{
background = backgrounds[i];
var bgClass = getClassList(background);
if (matchingBackground(slideClass, bgClass))
{
background.style.display = "block";
background.style.visibility = "visible";
}
else
{
background.style.display = "none";
background.style.visibility = "hidden";
}
}
}
else // forcibly hide all backgrounds
hideBackgrounds();
}
function hideBackgrounds()
{
for (var i = 0; i < backgrounds.length; i++)
{
background = backgrounds[i];
background.style.display = "none";
background.style.visibility = "hidden";
}
}
// compare classes for slide and background
function matchingBackground(slideClass, bgClass)
{
if (bgClass == "background")
return true;
// define pattern as regular expression
var pattern = /\w+/g;
// check for matches and place result in array
var result = slideClass.match(pattern);
// now check if desired name is present for background
for (var i = 0; i < result.length; i++)
{
if (hasToken(bgClass, result[i]))
return true;
}
return false;
}
// left to right traversal of root's content
function nextNode(root, node)
{
if (node == null)
return root.firstChild;
if (node.firstChild)
return node.firstChild;
if (node.nextSibling)
return node.nextSibling;
for (;;)
{
node = node.parentNode;
if (!node || node == root)
break;
if (node && node.nextSibling)
return node.nextSibling;
}
return null;
}
// right to left traversal of root's content
function previousNode(root, node)
{
if (node == null)
{
node = root.lastChild;
if (node)
{
while (node.lastChild)
node = node.lastChild;
}
return node;
}
if (node.previousSibling)
{
node = node.previousSibling;
while (node.lastChild)
node = node.lastChild;
return node;
}
if (node.parentNode != root)
return node.parentNode;
return null;
}
// HTML elements that can be used with class="incremental"
// note that you can also put the class on containers like
// up, ol, dl, and div to make their contents appear
// incrementally. Upper case is used since this is what
// browsers report for HTML node names (text/html).
function incrementalElementList()
{
var inclist = new Array();
inclist["P"] = true;
inclist["PRE"] = true;
inclist["LI"] = true;
inclist["BLOCKQUOTE"] = true;
inclist["DT"] = true;
inclist["DD"] = true;
inclist["H2"] = true;
inclist["H3"] = true;
inclist["H4"] = true;
inclist["H5"] = true;
inclist["H6"] = true;
inclist["SPAN"] = true;
inclist["ADDRESS"] = true;
inclist["TABLE"] = true;
inclist["TR"] = true;
inclist["TH"] = true;
inclist["TD"] = true;
inclist["IMG"] = true;
inclist["OBJECT"] = true;
return inclist;
}
function nextIncrementalItem(node)
{
var slide = slides[slidenum];
for (;;)
{
node = nextNode(slide, node);
if (node == null || node.parentNode == null)
break;
if (node.nodeType == 1) // ELEMENT
{
if (node.nodeName == "BR")
continue;
if (hasClass(node, "incremental")
&& okayForIncremental[node.nodeName])
return node;
if (hasClass(node.parentNode, "incremental")
&& !hasClass(node, "non-incremental"))
return node;
}
}
return node;
}
function previousIncrementalItem(node)
{
var slide = slides[slidenum];
for (;;)
{
node = previousNode(slide, node);
if (node == null || node.parentNode == null)
break;
if (node.nodeType == 1)
{
if (node.nodeName == "BR")
continue;
if (hasClass(node, "incremental")
&& okayForIncremental[node.nodeName])
return node;
if (hasClass(node.parentNode, "incremental")
&& !hasClass(node, "non-incremental"))
return node;
}
}
return node;
}
// set visibility for all elements on current slide with
// a parent element with attribute class="incremental"
function setVisibilityAllIncremental(value)
{
var node = nextIncrementalItem(null);
while (node)
{
node.style.visibility = value;
node = nextIncrementalItem(node);
}
}
// reveal the next hidden item on the slide
// node is null or the node that was last revealed
function revealNextItem(node)
{
node = nextIncrementalItem(node);
if (node && node.nodeType == 1) // an element
node.style.visibility = "visible";
return node;
}
// exact inverse of revealNextItem(node)
function hidePreviousItem(node)
{
if (node && node.nodeType == 1) // an element
node.style.visibility = "hidden";
return previousIncrementalItem(node);
}
/* set click handlers on all anchors */
function patchAnchors()
{
var anchors = document.body.getElementsByTagName("a");
for (var i = 0; i < anchors.length; ++i)
{
anchors[i].onclick = clickedAnchor;
}
}
function clickedAnchor(e)
{
if (!e)
var e = window.event;
// compare this.href with location.href
// for link to another slide in this doc
if (pageAddress(this.href) == pageAddress(location.href))
{
// yes, so find new slide number
var newslidenum = findSlideNumber(this.href);
if (newslidenum != slidenum)
{
slide = slides[slidenum];
hideSlide(slide);
slidenum = newslidenum;
slide = slides[slidenum];
showSlide(slide);
setLocation();
}
}
else if (this.target == null)
location.href = this.href;
this.blur();
stopPropagation(e);
}
function pageAddress(uri)
{
var i = uri.indexOf("#");
// check if anchor is entire page
if (i < 0)
return uri; // yes
return uri.substr(0, i);
}
function showSlideNumber()
{
slideNumElement.innerHTML = "slide".localize() + " " +
(slidenum + 1) + "/" + slides.length;
}
function setLocation()
{
var uri = pageAddress(location.href);
//if (slidenum > 0)
uri = uri + "#(" + (slidenum+1) + ")";
if (uri != location.href && !khtml)
location.href = uri;
document.title = title + " (" + (slidenum+1) + ")";
//document.title = (slidenum+1) + ") " + slideName(slidenum);
showSlideNumber();
}
// find current slide based upon location
// first find target anchor and then look
// for associated div element enclosing it
// finally map that to slide number
function findSlideNumber(uri)
{
// first get anchor from page location
var i = uri.indexOf("#");
// check if anchor is entire page
if (i < 0)
return 0; // yes
var anchor = unescape(uri.substr(i+1));
// now use anchor as XML ID to find target
var target = document.getElementById(anchor);
if (!target)
{
// does anchor look like "(2)" for slide 2 ??
// where first slide is (1)
var re = /\((\d)+\)/;
if (anchor.match(re))
{
var num = parseInt(anchor.substring(1, anchor.length-1));
if (num > slides.length)
num = 1;
if (--num < 0)
num = 0;
return num;
}
// accept [2] for backwards compatibility
re = /\[(\d)+\]/;
if (anchor.match(re))
{
var num = parseInt(anchor.substring(1, anchor.length-1));
if (num > slides.length)
num = 1;
if (--num < 0)
num = 0;
return num;
}
// oh dear unknown anchor
return 0;
}
// search for enclosing slide
while (true)
{
// browser coerces html elements to uppercase!
if (target.nodeName.toLowerCase() == "div" &&
hasClass(target, "slide"))
{
// found the slide element
break;
}
// otherwise try parent element if any
target = target.parentNode;
if (!target)
{
return 0; // no luck!
}
};
for (i = 0; i < slides.length; ++i)
{
if (slides[i] == target)
return i; // success
}
// oh dear still no luck
return 0;
}
// find slide name from first h1 element
// default to document title + slide number
function slideName(index)
{
var name = null;
var slide = slides[index];
var heading = findHeading(slide);
if (heading)
name = extractText(heading);
if (!name)
name = title + "(" + (index + 1) + ")";
name.replace(/\&/g, "&amp;");
name.replace(/\</g, "&lt;");
name.replace(/\>/g, "&gt;");
return name;
}
// find first h1 element in DOM tree
function findHeading(node)
{
if (!node || node.nodeType != 1)
return null;
if (node.nodeName == "H1" || node.nodeName == "h1")
return node;
var child = node.firstChild;
while (child)
{
node = findHeading(child);
if (node)
return node;
child = child.nextSibling;
}
return null;
}
// recursively extract text from DOM tree
function extractText(node)
{
if (!node)
return "";
// text nodes
if (node.nodeType == 3)
return node.nodeValue;
// elements
if (node.nodeType == 1)
{
node = node.firstChild;
var text = "";
while (node)
{
text = text + extractText(node);
node = node.nextSibling;
}
return text;
}
return "";
}
// find copyright text from meta element
function findCopyright()
{
var name, content;
var meta = document.getElementsByTagName("meta");
for (var i = 0; i < meta.length; ++i)
{
name = meta[i].getAttribute("name");
content = meta[i].getAttribute("content");
if (name == "copyright")
return content;
}
return null;
}
function findSizeAdjust()
{
var name, content, offset;
var meta = document.getElementsByTagName("meta");
for (var i = 0; i < meta.length; ++i)
{
name = meta[i].getAttribute("name");
content = meta[i].getAttribute("content");
if (name == "font-size-adjustment")
return 1 * content;
}
return 0;
}
function addToolbar()
{
var slideCounter, page;
var toolbar = createElement("div");
toolbar.setAttribute("class", "toolbar");
if (ns_pos) // a reasonably behaved browser
{
var right = document.createElement("div");
right.setAttribute("style", "float: right; text-align: right");
slideCounter = document.createElement("div")
slideCounter.innerHTML = "slide".localize() + " n/m";
right.appendChild(slideCounter);
toolbar.appendChild(right);
var left = document.createElement("div");
left.setAttribute("style", "text-align: left");
// global end of slide indicator
eos = document.createElement("span");
eos.innerHTML = "* ";
left.appendChild(eos);
var help = document.createElement("a");
help.setAttribute("href", helpPage);
help.setAttribute("title", helpText.localize());
help.innerHTML = "help?".localize();
left.appendChild(help);
helpAnchor = help; // save for focus hack
var gap1 = document.createTextNode(" ");
left.appendChild(gap1);
var contents = document.createElement("a");
contents.setAttribute("href", "javascript:toggleTableOfContents()");
contents.setAttribute("title", "table of contents".localize());
contents.innerHTML = "contents?".localize();
left.appendChild(contents);
var gap2 = document.createTextNode(" ");
left.appendChild(gap2);
var i = location.href.indexOf("#");
// check if anchor is entire page
if (i > 0)
page = location.href.substr(0, i);
else
page = location.href;
var start = document.createElement("a");
start.setAttribute("href", page);
start.setAttribute("title", "restart presentation".localize());
start.innerHTML = "restart?".localize();
// start.setAttribute("href", "javascript:printSlides()");
// start.setAttribute("title", "print all slides".localize());
// start.innerHTML = "print!".localize();
left.appendChild(start);
var copyright = findCopyright();
if (copyright)
{
var span = document.createElement("span");
span.innerHTML = copyright;
span.style.color = "black";
span.style.marginLeft = "4em";
left.appendChild(span);
}
toolbar.appendChild(left);
}
else // IE so need to work around its poor CSS support
{
toolbar.style.position = (ie7 ? "fixed" : "absolute");
toolbar.style.zIndex = "200";
toolbar.style.width = "99.9%";
toolbar.style.height = "1.2em";
toolbar.style.top = "auto";
toolbar.style.bottom = "0";
toolbar.style.left = "0";
toolbar.style.right = "0";
toolbar.style.textAlign = "left";
toolbar.style.fontSize = "60%";
toolbar.style.color = "red";
toolbar.borderWidth = 0;
toolbar.style.background = "rgb(240,240,240)";
// would like to have help text left aligned
// and page counter right aligned, floating
// div's don't work, so instead use nested
// absolutely positioned div's.
var sp = document.createElement("span");
sp.innerHTML = "&nbsp;&nbsp;*&nbsp;";
toolbar.appendChild(sp);
eos = sp; // end of slide indicator
var help = document.createElement("a");
help.setAttribute("href", helpPage);
help.setAttribute("title", helpText.localize());
help.innerHTML = "help?".localize();
toolbar.appendChild(help);
helpAnchor = help; // save for focus hack
var gap1 = document.createTextNode(" ");
toolbar.appendChild(gap1);
var contents = document.createElement("a");
contents.setAttribute("href", "javascript:toggleTableOfContents()");
contents.setAttribute("title", "table of contents".localize());
contents.innerHTML = "contents?".localize();
toolbar.appendChild(contents);
var gap2 = document.createTextNode(" ");
toolbar.appendChild(gap2);
var i = location.href.indexOf("#");
// check if anchor is entire page
if (i > 0)
page = location.href.substr(0, i);
else
page = location.href;
var start = document.createElement("a");
start.setAttribute("href", page);
start.setAttribute("title", "restart presentation".localize());
start.innerHTML = "restart?".localize();
// start.setAttribute("href", "javascript:printSlides()");
// start.setAttribute("title", "print all slides".localize());
// start.innerHTML = "print!".localize();
toolbar.appendChild(start);
var copyright = findCopyright();
if (copyright)
{
var span = document.createElement("span");
span.innerHTML = copyright;
span.style.color = "black";
span.style.marginLeft = "2em";
toolbar.appendChild(span);
}
slideCounter = document.createElement("div")
slideCounter.style.position = "absolute";
slideCounter.style.width = "auto"; //"20%";
slideCounter.style.height = "1.2em";
slideCounter.style.top = "auto";
slideCounter.style.bottom = 0;
slideCounter.style.right = "0";
slideCounter.style.textAlign = "right";
slideCounter.style.color = "red";
slideCounter.style.background = "rgb(240,240,240)";
slideCounter.innerHTML = "slide".localize() + " n/m";
toolbar.appendChild(slideCounter);
}
// ensure that click isn't passed through to the page
toolbar.onclick = stopPropagation;
document.body.appendChild(toolbar);
slideNumElement = slideCounter;
setEosStatus(false);
return toolbar;
}
function isShownToc()
{
if (toc && toc.style.visible == "visible")
return true;
return false;
}
function showTableOfContents()
{
if (toc)
{
if (toc.style.visibility != "visible")
{
toc.style.visibility = "visible";
toc.style.display = "block";
toc.focus();
if (ie7 && slidenum == 0)
setTimeout("ieHack()", 100);
}
else
hideTableOfContents();
}
}
function hideTableOfContents()
{
if (toc && toc.style.visibility != "hidden")
{
toc.style.visibility = "hidden";
toc.style.display = "none";
try
{
if (!opera)
helpAnchor.focus();
}
catch (e)
{
}
}
}
function toggleTableOfContents()
{
if (toc)
{
if (toc.style.visible != "visible")
showTableOfContents();
else
hideTableOfContents();
}
}
// called on clicking toc entry
function gotoEntry(e)
{
var target;
if (!e)
var e = window.event;
if (e.target)
target = e.target;
else if (e.srcElement)
target = e.srcElement;
// work around Safari bug
if (target.nodeType == 3)
target = target.parentNode;
if (target && target.nodeType == 1)
{
var uri = target.getAttribute("href");
if (uri)
{
//alert("going to " + uri);
var slide = slides[slidenum];
hideSlide(slide);
slidenum = findSlideNumber(uri);
slide = slides[slidenum];
lastShown = null;
setLocation();
setVisibilityAllIncremental("hidden");
setEosStatus(!nextIncrementalItem(lastShown));
showSlide(slide);
//target.focus();
try
{
if (!opera)
helpAnchor.focus();
}
catch (e)
{
}
}
}
hideTableOfContents(e);
if (ie7) ieHack();
stopPropagation(e);
return cancel(e);
}
// called onkeydown for toc entry
function gotoTocEntry(event)
{
var key;
if (!event)
var event = window.event;
// kludge around NS/IE differences
if (window.event)
key = window.event.keyCode;
else if (event.which)
key = event.which;
else
return true; // Yikes! unknown browser
// ignore event if key value is zero
// as for alt on Opera and Konqueror
if (!key)
return true;
// check for concurrent control/command/alt key
// but are these only present on mouse events?
if (event.ctrlKey || event.altKey)
return true;
if (key == 13)
{
var uri = this.getAttribute("href");
if (uri)
{
//alert("going to " + uri);
var slide = slides[slidenum];
hideSlide(slide);
slidenum = findSlideNumber(uri);
slide = slides[slidenum];
lastShown = null;
setLocation();
setVisibilityAllIncremental("hidden");
setEosStatus(!nextIncrementalItem(lastShown));
showSlide(slide);
//target.focus();
try
{
if (!opera)
helpAnchor.focus();
}
catch (e)
{
}
}
hideTableOfContents();
if (ie7) ieHack();
return cancel(event);
}
if (key == 40 && this.next)
{
this.next.focus();
return cancel(event);
}
if (key == 38 && this.previous)
{
this.previous.focus();
return cancel(event);
}
return true;
}
function isTitleSlide(slide)
{
return hasClass(slide, "title");
}
// create div element with links to each slide
function tableOfContents()
{
var toc = document.createElement("div");
addClass(toc, "toc");
//toc.setAttribute("tabindex", "0");
var heading = document.createElement("div");
addClass(heading, "toc-heading");
heading.innerHTML = "Table of Contents".localize();
heading.style.textAlign = "center";
heading.style.width = "100%";
heading.style.margin = "0";
heading.style.marginBottom = "1em";
heading.style.borderBottomStyle = "solid";
heading.style.borderBottomColor = "rgb(180,180,180)";
heading.style.borderBottomWidth = "1px";
toc.appendChild(heading);
var previous = null;
for (var i = 0; i < slides.length; ++i)
{
var title = hasClass(slides[i], "title");
var num = document.createTextNode((i + 1) + ". ");
toc.appendChild(num);
var a = document.createElement("a");
a.setAttribute("href", "#(" + (i+1) + ")");
if (title)
addClass(a, "titleslide");
var name = document.createTextNode(slideName(i));
a.appendChild(name);
a.onclick = gotoEntry;
a.onkeydown = gotoTocEntry;
a.previous = previous;
if (previous)
previous.next = a;
toc.appendChild(a);
if (i == 0)
toc.first = a;
if (i < slides.length - 1)
{
var br = document.createElement("br");
toc.appendChild(br);
}
previous = a;
}
toc.focus = function () {
if (this.first)
this.first.focus();
}
toc.onclick = function (e) {
e||(e=window.event);
hideTableOfContents();
stopPropagation(e);
if (e.cancel != undefined)
e.cancel = true;
if (e.returnValue != undefined)
e.returnValue = false;
return false;
};
toc.style.position = "absolute";
toc.style.zIndex = "300";
toc.style.width = "60%";
toc.style.maxWidth = "30em";
toc.style.height = "30em";
toc.style.overflow = "auto";
toc.style.top = "auto";
toc.style.right = "auto";
toc.style.left = "4em";
toc.style.bottom = "4em";
toc.style.padding = "1em";
toc.style.background = "rgb(240,240,240)";
toc.style.borderStyle = "solid";
toc.style.borderWidth = "2px";
toc.style.fontSize = "60%";
document.body.insertBefore(toc, document.body.firstChild);
return toc;
}
function replaceByNonBreakingSpace(str)
{
for (var i = 0; i < str.length; ++i)
str[i] = 160;
}
function initOutliner()
{
var items = document.getElementsByTagName("LI");
for (var i = 0; i < items.length; ++i)
{
var target = items[i];
if (!hasClass(target.parentNode, "outline"))
continue;
target.onclick = outlineClick;
if (!ns_pos)
{
target.onmouseover = hoverOutline;
target.onmouseout = unhoverOutline;
}
if (foldable(target))
{
target.foldable = true;
target.onfocus = function () {outline = this;};
target.onblur = function () {outline = null;};
if (!target.getAttribute("tabindex"))
target.setAttribute("tabindex", "0");
if (hasClass(target, "expand"))
unfold(target);
else
fold(target);
}
else
{
addClass(target, "nofold");
target.visible = true;
target.foldable = false;
}
}
}
function foldable(item)
{
if (!item || item.nodeType != 1)
return false;
var node = item.firstChild;
while (node)
{
if (node.nodeType == 1 && isBlock(node))
return true;
node = node.nextSibling;
}
return false;
}
function fold(item)
{
if (item)
{
removeClass(item, "unfolded");
addClass(item, "folded");
}
var node = item ? item.firstChild : null;
while (node)
{
if (node.nodeType == 1 && isBlock(node)) // element
{
// note that getElementStyle won't work for Safari 1.3
node.display = getElementStyle(node, "display", "display");
node.style.display = "none";
node.style.visibility = "hidden";
}
node = node.nextSibling;
}
item.visible = false;
}
function unfold(item)
{
if (item)
{
addClass(item, "unfolded");
removeClass(item, "folded");
}
var node = item ? item.firstChild : null;
while (node)
{
if (node.nodeType == 1 && isBlock(node)) // element
{
// with fallback for Safari, see above
node.style.display = (node.display ? node.display : "block");
node.style.visibility = "visible";
}
node = node.nextSibling;
}
item.visible = true;
}
function outlineClick(e)
{
var rightclick = false;
var target;
if (!e)
var e = window.event;
if (e.target)
target = e.target;
else if (e.srcElement)
target = e.srcElement;
// work around Safari bug
if (target.nodeType == 3)
target = target.parentNode;
while (target && target.visible == undefined)
target = target.parentNode;
if (!target)
return true;
if (e.which)
rightclick = (e.which == 3);
else if (e.button)
rightclick = (e.button == 2);
if (!rightclick && target.visible != undefined)
{
if (target.foldable)
{
if (target.visible)
fold(target);
else
unfold(target);
}
stopPropagation(e);
e.cancel = true;
e.returnValue = false;
}
return false;
}
function hoverOutline(e)
{
var target;
if (!e)
var e = window.event;
if (e.target)
target = e.target;
else if (e.srcElement)
target = e.srcElement;
// work around Safari bug
if (target.nodeType == 3)
target = target.parentNode;
while (target && target.visible == undefined)
target = target.parentNode;
if (target && target.foldable)
target.style.cursor = "pointer";
return true;
}
function unhoverOutline(e)
{
var target;
if (!e)
var e = window.event;
if (e.target)
target = e.target;
else if (e.srcElement)
target = e.srcElement;
// work around Safari bug
if (target.nodeType == 3)
target = target.parentNode;
while (target && target.visible == undefined)
target = target.parentNode;
if (target)
target.style.cursor = "default";
return true;
}
function stopPropagation(e)
{
if (window.event)
{
window.event.cancelBubble = true;
//window.event.returnValue = false;
}
else if (e)
{
e.cancelBubble = true;
e.stopPropagation();
//e.preventDefault();
}
}
/* can't rely on display since we set that to none to hide things */
function isBlock(elem)
{
var tag = elem.nodeName;
return tag == "OL" || tag == "UL" || tag == "P" ||
tag == "LI" || tag == "TABLE" || tag == "PRE" ||
tag == "H1" || tag == "H2" || tag == "H3" ||
tag == "H4" || tag == "H5" || tag == "H6" ||
tag == "BLOCKQUOTE" || tag == "ADDRESS";
}
function getElementStyle(elem, IEStyleProp, CSSStyleProp)
{
if (elem.currentStyle)
{
return elem.currentStyle[IEStyleProp];
}
else if (window.getComputedStyle)
{
var compStyle = window.getComputedStyle(elem, "");
return compStyle.getPropertyValue(CSSStyleProp);
}
return "";
}
// works with text/html and text/xhtml+xml with thanks to Simon Willison
function createElement(element)
{
if (typeof document.createElementNS != 'undefined')
{
return document.createElementNS('http://www.w3.org/1999/xhtml', element);
}
if (typeof document.createElement != 'undefined')
{
return document.createElement(element);
}
return false;
}
// designed to work with both text/html and text/xhtml+xml
function getElementsByTagName(name)
{
if (typeof document.getElementsByTagNameNS != 'undefined')
{
return document.getElementsByTagNameNS('http://www.w3.org/1999/xhtml', name);
}
if (typeof document.getElementsByTagName != 'undefined')
{
return document.getElementsByTagName(name);
}
return null;
}
/*
// clean alternative to innerHTML method, but on IE6
// it doesn't work with named entities like &nbsp;
// which need to be replaced by numeric entities
function insertText(element, text)
{
try
{
element.textContent = text; // DOM3 only
}
catch (e)
{
if (element.firstChild)
{
// remove current children
while (element.firstChild)
element.removeChild(element.firstChild);
}
element.appendChild(document.createTextNode(text));
}
}
// as above, but as method of all element nodes
// doesn't work in IE6 which doesn't allow you to
// add methods to the HTMLElement prototype
if (HTMLElement != undefined)
{
HTMLElement.prototype.insertText = function(text) {
var element = this;
try
{
element.textContent = text; // DOM3 only
}
catch (e)
{
if (element.firstChild)
{
// remove current children
while (element.firstChild)
element.removeChild(element.firstChild);
}
element.appendChild(document.createTextNode(text));
}
};
}
*/
function getSelectedText()
{
try
{
if (window.getSelection)
return window.getSelection().toString();
if (document.getSelection)
return document.getSelection().toString();
if (document.selection)
return document.selection.createRange().text;
}
catch (e)
{
return "";
}
return "";
}