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189 oalug_2009-06-30_backups/presentation.txt
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+===========================
+Ogden Area Linux User Group
+===========================
+Backups
+-------
+
+:Presenter: Seth House
+:Date: 2009-06-30
+
+.. include:: <s5defs.txt>
+.. footer:: ``rsync -a -delete --link-dest=$BACKUPDIR/`/bin/ls -t $BACKUPDIR | head -1` $HOME/ $BACKUPDIR/`date '+%FT%R'```
+
+Overview
+========
+
+.. class:: handout
+
+ Backup strategies depend highly on the specific needs of the system and the
+ user. There is no one-size-fits-all solution. Many talks on backups try to
+ cover many situations; I’m only going to discuss one. This advice should
+ suffice for *most* personal desktop usage.
+
+ Again, it is up to you to think through your usage and how your computer is
+ set up in order to decide what works for you.
+
+ Jamie W. Zawinski, famous for work on Mozilla, Netscape Navigator, and
+ currently maintains the XScreenSaver project.
+
+“The universe tends toward maximum irony. Don’t push it.”
+— jwz
+
+
+Where to Back Up Your Files
+===========================
+
+.. class:: handout
+
+ The backup method I’ll be talking about is as follows. Buy two external
+ hard drives. I know, there’s plenty of other things I’d rather spend $120
+ on too — do it anyway. Copy your files to one of the drives every single
+ day. Don’t forget — for the love of Pete, automate it. Keep that drive in
+ your home. Copy your files to the other drive once a month. Take it to the
+ office if you trust your desk space, or have a Backup Buddy and leave it at
+ your friend’s house. (I’ll talk about encrypting your drives at some later
+ date.)
+
+.. class:: incremental
+
+ * Good: Keep a copy of your files on a separate partition.
+ * Better: Keep a copy of your files on a separate disk.
+ * Best:
+
+ * Buy two external hard drives.
+ * Copy your files to one every day; keep it in your home.
+ * Copy your files to the other once a month; keep it somewhere not in
+ your home.
+
+
+What Files to Back Up
+=====================
+
+.. class:: handout
+
+ Generally, there is no reason to back up your entire disk. Decide what you
+ want to backup by making notes as you build and configure your system. If
+ you make a change to your system that was time consuming or hard to figure
+ out, you’ll want to backup those changes. If your whole installation is
+ stock, you probably just want to backup your ``home`` folder.
+
+.. class:: incremental
+
+ * ``/etc``
+ * ``/var``
+
+ * ``/var/spool/mail``
+ * ``/var/logs``
+
+ * ``/boot/config`` or ``/usr/src/linux/.config``
+ * ``$HOME``
+
+How to Back Up Your Files
+=========================
+
+.. class:: handout
+
+ There are a plethora of backup utilities, some free some commercial. We’re
+ going to talk about plain ‘ol ``rsync`` because it ships with every Unix
+ everywhere.
+
+`Amanda`, `Bacula`_, `rdiff-backup`_, `TimeVault`_
+
+.. class:: incremental
+
+ ``rsync``
+
+.. _Amanda: http://amanda.zmanda.com/
+.. _Bacula: http://www.bacula.org/en/
+.. _rsnapshot: http://rsnapshot.org/
+.. _rdiff-backup: http://www.nongnu.org/rdiff-backup/
+.. _TimeVault: http://wiki.ubuntu.com/TimeVault
+
+
+Behold! The Power of ``rsync``
+==============================
+
+.. class:: handout
+
+ We can replicate all the functionality of Apple’s Time Machine in a one line
+ command. (Hyperbole much?)
+
+ How does this work? Well, we create an initial full backup of all your
+ files. Then we run a cronjob every two hours and rsync compares your
+ current files with the most recent backup, making hard links to everything
+ that is the same, and making full copies of everything that is different.
+
+ Hard links have the following properties, given the file ``a`` with link
+ ``b``: the contents of the file are only stored once, so you don’t use
+ twice the space; if you change ``a``, you're changing ``b``, and
+ vice-versa; if you change the permissions or ownership of ``a``, you're
+ changing those of ``b`` as well, and vice-versa; if you overwrite ``a`` by
+ copying a third file on top of it, you will also overwrite ``b``.
+
+ This command works because rsync always unlinks before overwriting. This is
+ referred to as creating `rsync Snapshots`_.
+
+ We usually think of a file's name as being the file itself, but really
+ the name is a hard link. A given file can have more than one hard link
+ to itself--for example, a directory has at least two hard links: the
+ directory name and . (for when you're inside it). It also has one hard
+ link from each of its sub-directories (the .. file inside each one). If
+ you have the stat utility installed on your machine, you can find out
+ how many hard links a file has […].
+
+ — Mike Rubel, http://www.mikerubel.org/computers/rsync_snapshots/#Incremental
+
+ What happens if you rm one of the links? The answer is that rm is a bit of
+ a misnomer; it doesn't really remove a file, it just removes that one link
+ to it. A file's contents aren't truly removed until the number of links to
+ it reaches zero.
+
+ Want a GUI? http://code.google.com/p/flyback/
+
+ To restore the backed-up files, just copy them! Simple.
+
+.. _rsync Snapshots: http://www.mikerubel.org/computers/rsync_snapshots/
+
+.. class:: incremental
+
+ `Apple’s Time Machine`_ in one line:
+
+.. _Apple’s Time Machine: http://en.wikipedia.org/wiki/Time_Machine_(Apple_software)#How_It_Works
+
+.. class:: incremental tiny
+
+ ::
+
+ 0 */2 * * * BACKUPDIR=/var/timemachine/$USER;\
+ rsync -a -delete\
+ --link-dest=$BACKUPDIR/`/bin/ls -t $BACKUPDIR | head -1`\
+ $HOME/ $BACKUPDIR/`date '+%FT%R'`
+
+.. ** vim syntax highlighting fix
+
+.. class:: incremental
+
+ You have to manually create the initial backup with:
+
+.. class:: incremental tiny
+
+ ::
+
+ rsync -a $HOME/ /var/timemachine/$USER/`date '+%FT%R'`
+
+
+Useful ``rsync`` Flags
+======================
+
+``-x``
+ Avoid crossing filesystem boundries.
+``--exclude``
+ Do not sync any files or directories that match a pattern or path.
+``--dry-run``
+ Don’t make any actual changes to the filesystem.
+``-P``
+ Resume partially transfered files and show a progress meter.
+
+
+
+.. vim:filetype=rst
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BIN oalug_2009-06-30_backups/ui/small-black/blank.gif
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24 oalug_2009-06-30_backups/ui/small-black/framing.css
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+/* This file has been placed in the public domain. */
+/* The following styles size, place, and layer the slide components.
+ Edit these if you want to change the overall slide layout.
+ The commented lines can be uncommented (and modified, if necessary)
+ to help you with the rearrangement process. */
+
+/* target = 1024x768 */
+
+div#header, div#footer, .slide {width: 100%; top: 0; left: 0;}
+div#footer {top: auto; bottom: 0; height: 2.5em; z-index: 5;}
+.slide {top: 0; width: 92%; padding: 1em 4% 0 4%; z-index: 2;}
+div#controls {left: 50%; bottom: 0; width: 50%; z-index: 100;}
+div#controls form {position: absolute; bottom: 0; right: 0; width: 100%;
+ margin: 0;}
+#currentSlide {position: absolute; width: 10%; left: 45%; bottom: 1em;
+ z-index: 10;}
+html>body #currentSlide {position: fixed;}
+
+/*
+div#header {background: #FCC;}
+div#footer {background: #CCF;}
+div#controls {background: #BBD;}
+div#currentSlide {background: #FFC;}
+*/
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42 oalug_2009-06-30_backups/ui/small-black/iepngfix.htc
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+<public:component>
+<public:attach event="onpropertychange" onevent="doFix()" />
+
+<script>
+
+// IE5.5+ PNG Alpha Fix v1.0 by Angus Turnbull http://www.twinhelix.com
+// Free usage permitted as long as this notice remains intact.
+
+// This must be a path to a blank image. That's all the configuration you need here.
+var blankImg = 'ui/small-black/blank.gif';
+
+var f = 'DXImageTransform.Microsoft.AlphaImageLoader';
+
+function filt(s, m) {
+ if (filters[f]) {
+ filters[f].enabled = s ? true : false;
+ if (s) with (filters[f]) { src = s; sizingMethod = m }
+ } else if (s) style.filter = 'progid:'+f+'(src="'+s+'",sizingMethod="'+m+'")';
+}
+
+function doFix() {
+ if ((parseFloat(navigator.userAgent.match(/MSIE (\S+)/)[1]) < 5.5) ||
+ (event && !/(background|src)/.test(event.propertyName))) return;
+
+ if (tagName == 'IMG') {
+ if ((/\.png$/i).test(src)) {
+ filt(src, 'image'); // was 'scale'
+ src = blankImg;
+ } else if (src.indexOf(blankImg) < 0) filt();
+ } else if (style.backgroundImage) {
+ if (style.backgroundImage.match(/^url[("']+(.*\.png)[)"']+$/i)) {
+ var s = RegExp.$1;
+ style.backgroundImage = '';
+ filt(s, 'crop');
+ } else filt();
+ }
+}
+
+doFix();
+
+</script>
+</public:component>
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8 oalug_2009-06-30_backups/ui/small-black/opera.css
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+/* This file has been placed in the public domain. */
+/* DO NOT CHANGE THESE unless you really want to break Opera Show */
+.slide {
+ visibility: visible !important;
+ position: static !important;
+ page-break-before: always;
+}
+#slide0 {page-break-before: avoid;}
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16 oalug_2009-06-30_backups/ui/small-black/outline.css
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+/* This file has been placed in the public domain. */
+/* Don't change this unless you want the layout stuff to show up in the
+ outline view! */
+
+.layout div, #footer *, #controlForm * {display: none;}
+#footer, #controls, #controlForm, #navLinks, #toggle {
+ display: block; visibility: visible; margin: 0; padding: 0;}
+#toggle {float: right; padding: 0.5em;}
+html>body #toggle {position: fixed; top: 0; right: 0;}
+
+/* making the outline look pretty-ish */
+
+#slide0 h1, #slide0 h2, #slide0 h3, #slide0 h4 {border: none; margin: 0;}
+#toggle {border: 1px solid; border-width: 0 0 1px 1px; background: #FFF;}
+
+.outline {display: inline ! important;}
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116 oalug_2009-06-30_backups/ui/small-black/pretty.css
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+/* This file has been placed in the public domain. */
+/* Following are the presentation styles -- edit away! */
+
+html, body {margin: 0; padding: 0;}
+body {background: black; color: white;}
+:link, :visited {text-decoration: none; color: cyan;}
+#controls :active {color: #888 !important;}
+#controls :focus {outline: 1px dotted #CCC;}
+h1, h2, h3, h4 {font-size: 100%; margin: 0; padding: 0; font-weight: inherit;}
+
+blockquote {padding: 0 2em 0.5em; margin: 0 1.5em 0.5em;}
+blockquote p {margin: 0;}
+
+kbd {font-weight: bold; font-size: 1em;}
+sup {font-size: smaller; line-height: 1px;}
+
+.slide pre {padding: 0; margin-left: 0; margin-right: 0; font-size: 90%;}
+.slide ul ul li {list-style: square;}
+.slide img.leader {display: block; margin: 0 auto;}
+.slide tt {font-size: 90%;}
+
+div#footer {font-family: sans-serif; color: #AAA;
+ font-size: 0.5em; font-weight: bold; padding: 1em 0;}
+#footer h1 {display: block; padding: 0 1em;}
+#footer h2 {display: block; padding: 0.8em 1em 0;}
+
+.slide {font-size: 1.2em;}
+.slide h1 {padding-top: 0; z-index: 1; margin: 0; font: bold 150% sans-serif;}
+.slide h2 {font: bold 120% sans-serif; padding-top: 0.5em;}
+.slide h3 {font: bold 100% sans-serif; padding-top: 0.5em;}
+h1 abbr {font-variant: small-caps;}
+
+div#controls {position: absolute; left: 50%; bottom: 0;
+ width: 50%; text-align: right; font: bold 0.9em sans-serif;}
+html>body div#controls {position: fixed; padding: 0 0 1em 0; top: auto;}
+div#controls form {position: absolute; bottom: 0; right: 0; width: 100%;
+ margin: 0; padding: 0;}
+#controls #navLinks a {padding: 0; margin: 0 0.5em;
+ border: none; color: #888; cursor: pointer;}
+#controls #navList {height: 1em;}
+#controls #navList #jumplist {position: absolute; bottom: 0; right: 0;
+ background: black; color: #CCC;}
+
+#currentSlide {text-align: center; font-size: 0.5em; color: #AAA;
+ font-family: sans-serif; font-weight: bold;}
+
+#slide0 {padding-top: 0em}
+#slide0 h1 {position: static; margin: 1em 0 0; padding: 0;
+ font: bold 2em sans-serif; white-space: normal; background: transparent;}
+#slide0 h2 {font: bold italic 1em sans-serif; margin: 0.25em;}
+#slide0 h3 {margin-top: 1.5em; font-size: 1.5em;}
+#slide0 h4 {margin-top: 0; font-size: 1em;}
+
+ul.urls {list-style: none; display: inline; margin: 0;}
+.urls li {display: inline; margin: 0;}
+.external {border-bottom: 1px dotted gray;}
+html>body .external {border-bottom: none;}
+.external:after {content: " \274F"; font-size: smaller; color: #FCC;}
+
+.incremental, .incremental *, .incremental *:after {
+ color: black; visibility: visible; border: 0;}
+img.incremental {visibility: hidden;}
+.slide .current {color: lime;}
+
+.slide-display {display: inline ! important;}
+
+.huge {font-family: sans-serif; font-weight: bold; font-size: 150%;}
+.big {font-family: sans-serif; font-weight: bold; font-size: 120%;}
+.small {font-size: 75%;}
+.tiny {font-size: 50% !important;}
+.huge tt, .big tt, .small tt, .tiny tt {font-size: 115%;}
+.huge pre, .big pre, .small pre, .tiny pre {font-size: 115%;}
+
+.maroon {color: maroon;}
+.red {color: red;}
+.magenta {color: magenta;}
+.fuchsia {color: fuchsia;}
+.pink {color: #FAA;}
+.orange {color: orange;}
+.yellow {color: yellow;}
+.lime {color: lime;}
+.green {color: green;}
+.olive {color: olive;}
+.teal {color: teal;}
+.cyan {color: cyan;}
+.aqua {color: aqua;}
+.blue {color: blue;}
+.navy {color: navy;}
+.purple {color: purple;}
+.black {color: black;}
+.gray {color: gray;}
+.silver {color: silver;}
+.white {color: white;}
+
+.left {text-align: left ! important;}
+.center {text-align: center ! important;}
+.right {text-align: right ! important;}
+
+.animation {position: relative; margin: 1em 0; padding: 0;}
+.animation img {position: absolute;}
+
+/* Docutils-specific overrides */
+
+.slide table.docinfo {margin: 1em 0 0.5em 2em;}
+
+div.sidebar {background-color: black;}
+
+pre.literal-block, pre.doctest-block {background-color: black;}
+
+tt.docutils {background-color: black;}
+
+/* diagnostics */
+/*
+li:after {content: " [" attr(class) "]"; color: #F88;}
+div:before {content: "[" attr(class) "]"; color: #F88;}
+*/
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24 oalug_2009-06-30_backups/ui/small-black/print.css
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+/* This file has been placed in the public domain. */
+/* The following rule is necessary to have all slides appear in print!
+ DO NOT REMOVE IT! */
+.slide, ul {page-break-inside: avoid; visibility: visible !important;}
+h1 {page-break-after: avoid;}
+
+body {font-size: 12pt; background: white;}
+* {color: black;}
+
+#slide0 h1 {font-size: 200%; border: none; margin: 0.5em 0 0.25em;}
+#slide0 h3 {margin: 0; padding: 0;}
+#slide0 h4 {margin: 0 0 0.5em; padding: 0;}
+#slide0 {margin-bottom: 3em;}
+
+#header {display: none;}
+#footer h1 {margin: 0; border-bottom: 1px solid; color: gray;
+ font-style: italic;}
+#footer h2, #controls {display: none;}
+
+.print {display: inline ! important;}
+
+/* The following rule keeps the layout stuff out of print.
+ Remove at your own risk! */
+.layout, .layout * {display: none !important;}
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11 oalug_2009-06-30_backups/ui/small-black/s5-core.css
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+/* This file has been placed in the public domain. */
+/* Do not edit or override these styles!
+ The system will likely break if you do. */
+
+div#header, div#footer, div#controls, .slide {position: absolute;}
+html>body div#header, html>body div#footer,
+ html>body div#controls, html>body .slide {position: fixed;}
+.handout {display: none;}
+.layout {display: block;}
+.slide, .hideme, .incremental {visibility: hidden;}
+#slide0 {visibility: visible;}
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10 oalug_2009-06-30_backups/ui/small-black/slides.css
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+/* This file has been placed in the public domain. */
+
+/* required to make the slide show run at all */
+@import url(s5-core.css);
+
+/* sets basic placement and size of slide components */
+@import url(framing.css);
+
+/* styles that make the slides look good */
+@import url(pretty.css);
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558 oalug_2009-06-30_backups/ui/small-black/slides.js
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+// S5 v1.1 slides.js -- released into the Public Domain
+// Modified for Docutils (http://docutils.sf.net) by David Goodger
+//
+// Please see http://www.meyerweb.com/eric/tools/s5/credits.html for
+// information about all the wonderful and talented contributors to this code!
+
+var undef;
+var slideCSS = '';
+var snum = 0;
+var smax = 1;
+var slideIDs = new Array();
+var incpos = 0;
+var number = undef;
+var s5mode = true;
+var defaultView = 'slideshow';
+var controlVis = 'visible';
+
+var isIE = navigator.appName == 'Microsoft Internet Explorer' ? 1 : 0;
+var isOp = navigator.userAgent.indexOf('Opera') > -1 ? 1 : 0;
+var isGe = navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('Safari') < 1 ? 1 : 0;
+
+function hasClass(object, className) {
+ if (!object.className) return false;
+ return (object.className.search('(^|\\s)' + className + '(\\s|$)') != -1);
+}
+
+function hasValue(object, value) {
+ if (!object) return false;
+ return (object.search('(^|\\s)' + value + '(\\s|$)') != -1);
+}
+
+function removeClass(object,className) {
+ if (!object) return;
+ object.className = object.className.replace(new RegExp('(^|\\s)'+className+'(\\s|$)'), RegExp.$1+RegExp.$2);
+}
+
+function addClass(object,className) {
+ if (!object || hasClass(object, className)) return;
+ if (object.className) {
+ object.className += ' '+className;
+ } else {
+ object.className = className;
+ }
+}
+
+function GetElementsWithClassName(elementName,className) {
+ var allElements = document.getElementsByTagName(elementName);
+ var elemColl = new Array();
+ for (var i = 0; i< allElements.length; i++) {
+ if (hasClass(allElements[i], className)) {
+ elemColl[elemColl.length] = allElements[i];
+ }
+ }
+ return elemColl;
+}
+
+function isParentOrSelf(element, id) {
+ if (element == null || element.nodeName=='BODY') return false;
+ else if (element.id == id) return true;
+ else return isParentOrSelf(element.parentNode, id);
+}
+
+function nodeValue(node) {
+ var result = "";
+ if (node.nodeType == 1) {
+ var children = node.childNodes;
+ for (var i = 0; i < children.length; ++i) {
+ result += nodeValue(children[i]);
+ }
+ }
+ else if (node.nodeType == 3) {
+ result = node.nodeValue;
+ }
+ return(result);
+}
+
+function slideLabel() {
+ var slideColl = GetElementsWithClassName('*','slide');
+ var list = document.getElementById('jumplist');
+ smax = slideColl.length;
+ for (var n = 0; n < smax; n++) {
+ var obj = slideColl[n];
+
+ var did = 'slide' + n.toString();
+ if (obj.getAttribute('id')) {
+ slideIDs[n] = obj.getAttribute('id');
+ }
+ else {
+ obj.setAttribute('id',did);
+ slideIDs[n] = did;
+ }
+ if (isOp) continue;
+
+ var otext = '';
+ var menu = obj.firstChild;
+ if (!menu) continue; // to cope with empty slides
+ while (menu && menu.nodeType == 3) {
+ menu = menu.nextSibling;
+ }
+ if (!menu) continue; // to cope with slides with only text nodes
+
+ var menunodes = menu.childNodes;
+ for (var o = 0; o < menunodes.length; o++) {
+ otext += nodeValue(menunodes[o]);
+ }
+ list.options[list.length] = new Option(n + ' : ' + otext, n);
+ }
+}
+
+function currentSlide() {
+ var cs;
+ var footer_nodes;
+ var vis = 'visible';
+ if (document.getElementById) {
+ cs = document.getElementById('currentSlide');
+ footer_nodes = document.getElementById('footer').childNodes;
+ } else {
+ cs = document.currentSlide;
+ footer = document.footer.childNodes;
+ }
+ cs.innerHTML = '<span id="csHere">' + snum + '<\/span> ' +
+ '<span id="csSep">\/<\/span> ' +
+ '<span id="csTotal">' + (smax-1) + '<\/span>';
+ if (snum == 0) {
+ vis = 'hidden';
+ }
+ cs.style.visibility = vis;
+ for (var i = 0; i < footer_nodes.length; i++) {
+ if (footer_nodes[i].nodeType == 1) {
+ footer_nodes[i].style.visibility = vis;
+ }
+ }
+}
+
+function go(step) {
+ if (document.getElementById('slideProj').disabled || step == 0) return;
+ var jl = document.getElementById('jumplist');
+ var cid = slideIDs[snum];
+ var ce = document.getElementById(cid);
+ if (incrementals[snum].length > 0) {
+ for (var i = 0; i < incrementals[snum].length; i++) {
+ removeClass(incrementals[snum][i], 'current');
+ removeClass(incrementals[snum][i], 'incremental');
+ }
+ }
+ if (step != 'j') {
+ snum += step;
+ lmax = smax - 1;
+ if (snum > lmax) snum = lmax;
+ if (snum < 0) snum = 0;
+ } else
+ snum = parseInt(jl.value);
+ var nid = slideIDs[snum];
+ var ne = document.getElementById(nid);
+ if (!ne) {
+ ne = document.getElementById(slideIDs[0]);
+ snum = 0;
+ }
+ if (step < 0) {incpos = incrementals[snum].length} else {incpos = 0;}
+ if (incrementals[snum].length > 0 && incpos == 0) {
+ for (var i = 0; i < incrementals[snum].length; i++) {
+ if (hasClass(incrementals[snum][i], 'current'))
+ incpos = i + 1;
+ else
+ addClass(incrementals[snum][i], 'incremental');
+ }
+ }
+ if (incrementals[snum].length > 0 && incpos > 0)
+ addClass(incrementals[snum][incpos - 1], 'current');
+ ce.style.visibility = 'hidden';
+ ne.style.visibility = 'visible';
+ jl.selectedIndex = snum;
+ currentSlide();
+ number = 0;
+}
+
+function goTo(target) {
+ if (target >= smax || target == snum) return;
+ go(target - snum);
+}
+
+function subgo(step) {
+ if (step > 0) {
+ removeClass(incrementals[snum][incpos - 1],'current');
+ removeClass(incrementals[snum][incpos], 'incremental');
+ addClass(incrementals[snum][incpos],'current');
+ incpos++;
+ } else {
+ incpos--;
+ removeClass(incrementals[snum][incpos],'current');
+ addClass(incrementals[snum][incpos], 'incremental');
+ addClass(incrementals[snum][incpos - 1],'current');
+ }
+}
+
+function toggle() {
+ var slideColl = GetElementsWithClassName('*','slide');
+ var slides = document.getElementById('slideProj');
+ var outline = document.getElementById('outlineStyle');
+ if (!slides.disabled) {
+ slides.disabled = true;
+ outline.disabled = false;
+ s5mode = false;
+ fontSize('1em');
+ for (var n = 0; n < smax; n++) {
+ var slide = slideColl[n];
+ slide.style.visibility = 'visible';
+ }
+ } else {
+ slides.disabled = false;
+ outline.disabled = true;
+ s5mode = true;
+ fontScale();
+ for (var n = 0; n < smax; n++) {
+ var slide = slideColl[n];
+ slide.style.visibility = 'hidden';
+ }
+ slideColl[snum].style.visibility = 'visible';
+ }
+}
+
+function showHide(action) {
+ var obj = GetElementsWithClassName('*','hideme')[0];
+ switch (action) {
+ case 's': obj.style.visibility = 'visible'; break;
+ case 'h': obj.style.visibility = 'hidden'; break;
+ case 'k':
+ if (obj.style.visibility != 'visible') {
+ obj.style.visibility = 'visible';
+ } else {
+ obj.style.visibility = 'hidden';
+ }
+ break;
+ }
+}
+
+// 'keys' code adapted from MozPoint (http://mozpoint.mozdev.org/)
+function keys(key) {
+ if (!key) {
+ key = event;
+ key.which = key.keyCode;
+ }
+ if (key.which == 84) {
+ toggle();
+ return;
+ }
+ if (s5mode) {
+ switch (key.which) {
+ case 10: // return
+ case 13: // enter
+ if (window.event && isParentOrSelf(window.event.srcElement, 'controls')) return;
+ if (key.target && isParentOrSelf(key.target, 'controls')) return;
+ if(number != undef) {
+ goTo(number);
+ break;
+ }
+ case 32: // spacebar
+ case 34: // page down
+ case 39: // rightkey
+ case 40: // downkey
+ if(number != undef) {
+ go(number);
+ } else if (!incrementals[snum] || incpos >= incrementals[snum].length) {
+ go(1);
+ } else {
+ subgo(1);
+ }
+ break;
+ case 33: // page up
+ case 37: // leftkey
+ case 38: // upkey
+ if(number != undef) {
+ go(-1 * number);
+ } else if (!incrementals[snum] || incpos <= 0) {
+ go(-1);
+ } else {
+ subgo(-1);
+ }
+ break;
+ case 36: // home
+ goTo(0);
+ break;
+ case 35: // end
+ goTo(smax-1);
+ break;
+ case 67: // c
+ showHide('k');
+ break;
+ }
+ if (key.which < 48 || key.which > 57) {
+ number = undef;
+ } else {
+ if (window.event && isParentOrSelf(window.event.srcElement, 'controls')) return;
+ if (key.target && isParentOrSelf(key.target, 'controls')) return;
+ number = (((number != undef) ? number : 0) * 10) + (key.which - 48);
+ }
+ }
+ return false;
+}
+
+function clicker(e) {
+ number = undef;
+ var target;
+ if (window.event) {
+ target = window.event.srcElement;
+ e = window.event;
+ } else target = e.target;
+ if (target.href != null || hasValue(target.rel, 'external') || isParentOrSelf(target, 'controls') || isParentOrSelf(target,'embed') || isParentOrSelf(target, 'object')) return true;
+ if (!e.which || e.which == 1) {
+ if (!incrementals[snum] || incpos >= incrementals[snum].length) {
+ go(1);
+ } else {
+ subgo(1);
+ }
+ }
+}
+
+function findSlide(hash) {
+ var target = document.getElementById(hash);
+ if (target) {
+ for (var i = 0; i < slideIDs.length; i++) {
+ if (target.id == slideIDs[i]) return i;
+ }
+ }
+ return null;
+}
+
+function slideJump() {
+ if (window.location.hash == null || window.location.hash == '') {
+ currentSlide();
+ return;
+ }
+ if (window.location.hash == null) return;
+ var dest = null;
+ dest = findSlide(window.location.hash.slice(1));
+ if (dest == null) {
+ dest = 0;
+ }
+ go(dest - snum);
+}
+
+function fixLinks() {
+ var thisUri = window.location.href;
+ thisUri = thisUri.slice(0, thisUri.length - window.location.hash.length);
+ var aelements = document.getElementsByTagName('A');
+ for (var i = 0; i < aelements.length; i++) {
+ var a = aelements[i].href;
+ var slideID = a.match('\#.+');
+ if ((slideID) && (slideID[0].slice(0,1) == '#')) {
+ var dest = findSlide(slideID[0].slice(1));
+ if (dest != null) {
+ if (aelements[i].addEventListener) {
+ aelements[i].addEventListener("click", new Function("e",
+ "if (document.getElementById('slideProj').disabled) return;" +
+ "go("+dest+" - snum); " +
+ "if (e.preventDefault) e.preventDefault();"), true);
+ } else if (aelements[i].attachEvent) {
+ aelements[i].attachEvent("onclick", new Function("",
+ "if (document.getElementById('slideProj').disabled) return;" +
+ "go("+dest+" - snum); " +
+ "event.returnValue = false;"));
+ }
+ }
+ }
+ }
+}
+
+function externalLinks() {
+ if (!document.getElementsByTagName) return;
+ var anchors = document.getElementsByTagName('a');
+ for (var i=0; i<anchors.length; i++) {
+ var anchor = anchors[i];
+ if (anchor.getAttribute('href') && hasValue(anchor.rel, 'external')) {
+ anchor.target = '_blank';
+ addClass(anchor,'external');
+ }
+ }
+}
+
+function createControls() {
+ var controlsDiv = document.getElementById("controls");
+ if (!controlsDiv) return;
+ var hider = ' onmouseover="showHide(\'s\');" onmouseout="showHide(\'h\');"';
+ var hideDiv, hideList = '';
+ if (controlVis == 'hidden') {
+ hideDiv = hider;
+ } else {
+ hideList = hider;
+ }
+ controlsDiv.innerHTML = '<form action="#" id="controlForm"' + hideDiv + '>' +
+ '<div id="navLinks">' +
+ '<a accesskey="t" id="toggle" href="javascript:toggle();">&#216;<\/a>' +
+ '<a accesskey="z" id="prev" href="javascript:go(-1);">&laquo;<\/a>' +
+ '<a accesskey="x" id="next" href="javascript:go(1);">&raquo;<\/a>' +
+ '<div id="navList"' + hideList + '><select id="jumplist" onchange="go(\'j\');"><\/select><\/div>' +
+ '<\/div><\/form>';
+ if (controlVis == 'hidden') {
+ var hidden = document.getElementById('navLinks');
+ } else {
+ var hidden = document.getElementById('jumplist');
+ }
+ addClass(hidden,'hideme');
+}
+
+function fontScale() { // causes layout problems in FireFox that get fixed if browser's Reload is used; same may be true of other Gecko-based browsers
+ if (!s5mode) return false;
+ var vScale = 22; // both yield 32 (after rounding) at 1024x768
+ var hScale = 32; // perhaps should auto-calculate based on theme's declared value?
+ if (window.innerHeight) {
+ var vSize = window.innerHeight;
+ var hSize = window.innerWidth;
+ } else if (document.documentElement.clientHeight) {
+ var vSize = document.documentElement.clientHeight;
+ var hSize = document.documentElement.clientWidth;
+ } else if (document.body.clientHeight) {
+ var vSize = document.body.clientHeight;
+ var hSize = document.body.clientWidth;
+ } else {
+ var vSize = 700; // assuming 1024x768, minus chrome and such
+ var hSize = 1024; // these do not account for kiosk mode or Opera Show
+ }
+ var newSize = Math.min(Math.round(vSize/vScale),Math.round(hSize/hScale));
+ fontSize(newSize + 'px');
+ if (isGe) { // hack to counter incremental reflow bugs
+ var obj = document.getElementsByTagName('body')[0];
+ obj.style.display = 'none';
+ obj.style.display = 'block';
+ }
+}
+
+function fontSize(value) {
+ if (!(s5ss = document.getElementById('s5ss'))) {
+ if (!isIE) {
+ document.getElementsByTagName('head')[0].appendChild(s5ss = document.createElement('style'));
+ s5ss.setAttribute('media','screen, projection');
+ s5ss.setAttribute('id','s5ss');
+ } else {
+ document.createStyleSheet();
+ document.s5ss = document.styleSheets[document.styleSheets.length - 1];
+ }
+ }
+ if (!isIE) {
+ while (s5ss.lastChild) s5ss.removeChild(s5ss.lastChild);
+ s5ss.appendChild(document.createTextNode('body {font-size: ' + value + ' !important;}'));
+ } else {
+ document.s5ss.addRule('body','font-size: ' + value + ' !important;');
+ }
+}
+
+function notOperaFix() {
+ slideCSS = document.getElementById('slideProj').href;
+ var slides = document.getElementById('slideProj');
+ var outline = document.getElementById('outlineStyle');
+ slides.setAttribute('media','screen');
+ outline.disabled = true;
+ if (isGe) {
+ slides.setAttribute('href','null'); // Gecko fix
+ slides.setAttribute('href',slideCSS); // Gecko fix
+ }
+ if (isIE && document.styleSheets && document.styleSheets[0]) {
+ document.styleSheets[0].addRule('img', 'behavior: url(ui/small-black/iepngfix.htc)');
+ document.styleSheets[0].addRule('div', 'behavior: url(ui/small-black/iepngfix.htc)');
+ document.styleSheets[0].addRule('.slide', 'behavior: url(ui/small-black/iepngfix.htc)');
+ }
+}
+
+function getIncrementals(obj) {
+ var incrementals = new Array();
+ if (!obj)
+ return incrementals;
+ var children = obj.childNodes;
+ for (var i = 0; i < children.length; i++) {
+ var child = children[i];
+ if (hasClass(child, 'incremental')) {
+ if (child.nodeName == 'OL' || child.nodeName == 'UL') {
+ removeClass(child, 'incremental');
+ for (var j = 0; j < child.childNodes.length; j++) {
+ if (child.childNodes[j].nodeType == 1) {
+ addClass(child.childNodes[j], 'incremental');
+ }
+ }
+ } else {
+ incrementals[incrementals.length] = child;
+ removeClass(child,'incremental');
+ }
+ }
+ if (hasClass(child, 'show-first')) {
+ if (child.nodeName == 'OL' || child.nodeName == 'UL') {
+ removeClass(child, 'show-first');
+ if (child.childNodes[isGe].nodeType == 1) {
+ removeClass(child.childNodes[isGe], 'incremental');
+ }
+ } else {
+ incrementals[incrementals.length] = child;
+ }
+ }
+ incrementals = incrementals.concat(getIncrementals(child));
+ }
+ return incrementals;
+}
+
+function createIncrementals() {
+ var incrementals = new Array();
+ for (var i = 0; i < smax; i++) {
+ incrementals[i] = getIncrementals(document.getElementById(slideIDs[i]));
+ }
+ return incrementals;
+}
+
+function defaultCheck() {
+ var allMetas = document.getElementsByTagName('meta');
+ for (var i = 0; i< allMetas.length; i++) {
+ if (allMetas[i].name == 'defaultView') {
+ defaultView = allMetas[i].content;
+ }
+ if (allMetas[i].name == 'controlVis') {
+ controlVis = allMetas[i].content;
+ }
+ }
+}
+
+// Key trap fix, new function body for trap()
+function trap(e) {
+ if (!e) {
+ e = event;
+ e.which = e.keyCode;
+ }
+ try {
+ modifierKey = e.ctrlKey || e.altKey || e.metaKey;
+ }
+ catch(e) {
+ modifierKey = false;
+ }
+ return modifierKey || e.which == 0;
+}
+
+function startup() {
+ defaultCheck();
+ if (!isOp) createControls();
+ slideLabel();
+ fixLinks();
+ externalLinks();
+ fontScale();
+ if (!isOp) {
+ notOperaFix();
+ incrementals = createIncrementals();
+ slideJump();
+ if (defaultView == 'outline') {
+ toggle();
+ }
+ document.onkeyup = keys;
+ document.onkeypress = trap;
+ document.onclick = clicker;
+ }
+}
+
+window.onload = startup;
+window.onresize = function(){setTimeout('fontScale()', 50);}

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