Add fp-js talk

author: Alan Pearce 2017-10-24 12:04:46 +0200
committer: Alan Pearce 2017-10-24 12:05:23 +0200
commit: e5cb8f1ef60c36d29d66bf8dbb25365423b9b3c8 (patch)
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diff --git a/static/talks/fp-js/s5-blank.html b/static/talks/fp-js/s5-blank.html
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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+
+<head>
+<title>Functional Programming</title>
+<!-- metadata -->
+<meta name="generator" content="S5" />
+<meta name="version" content="S5 1.1" />
+<meta name="presdate" content="20050728" />
+<meta name="author" content="Eric A. Meyer" />
+<meta name="company" content="Complex Spiral Consulting" />
+<!-- configuration parameters -->
+<meta name="defaultView" content="slideshow" />
+<meta name="controlVis" content="hidden" />
+<!-- style sheet links -->
+<link rel="stylesheet" href="ui/default/slides.css" type="text/css" media="projection" id="slideProj" />
+<link rel="stylesheet" href="ui/default/outline.css" type="text/css" media="screen" id="outlineStyle" />
+<link rel="stylesheet" href="ui/default/print.css" type="text/css" media="print" id="slidePrint" />
+<link rel="stylesheet" href="ui/default/opera.css" type="text/css" media="projection" id="operaFix" />
+<!-- S5 JS -->
+<script src="ui/default/slides.js" type="text/javascript"></script>
+</head>
+<body>
+
+<div class="layout">
+<div id="controls"><!-- DO NOT EDIT --></div>
+<div id="currentSlide"><!-- DO NOT EDIT --></div>
+<div id="header"></div>
+<div id="footer">
+<h1>Functional Programming</h1>
+</div>
+
+</div>
+
+
+<div class="presentation">
+
+<div class="slide">
+<h1>Functional Programming</h1>
+<h2>in JavaScript</h2>
+<h3>Alan Pearce</h3>
+</div>
+
+
+</div>
+
+</body>
+</html>
diff --git a/static/talks/fp-js/slides.html b/static/talks/fp-js/slides.html
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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
+<head>
+<!-- 2017-10-16 Mon 10:10 -->
+<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1" />
+<title>Functional Programming in JavaScript</title>
+<meta name="generator" content="Org mode" />
+<meta name="author" content="Alan Pearce" />
+<meta name="version" content="S5 1.2a2" />
+<meta name='defaultView' content='slideshow' />
+<meta name='controlVis' content='hidden' />
+<!-- style sheet links -->
+<link rel='stylesheet' href='ui/default/outline.css' type='text/css' media='screen' id='outlineStyle' />
+<link rel='stylesheet' href='ui/default/print.css' type='text/css' media='print' id='slidePrint' />
+<link rel='stylesheet' href='ui/default/opera.css' type='text/css' media='projection' id='operaFix' />
+<link rel='stylesheet' href='ui/default/slides.css' type='text/css' media='screen' id='slideProj' />
+<!-- S5 JS -->
+<script src='ui/default/slides.js' type='text/javascript'></script>
+
+
+</head>
+<body>
+<div class="layout">
+<div id="controls"><!-- no edit --></div>
+<div id="currentSlide"><!-- no edit --></div>
+<div id="header" class="status">
+&#x20;
+</div>
+
+<div id="footer" class="status">
+<h1>Alan Pearce - Functional Programming in JavaScript</h1>
+</div>
+
+</div>
+<div id="content" class="presentation">
+<div id='title-slide' class='slide'>
+<h1>Functional Programming in JavaScript</h1>
+<h2></h2>
+<h2>Alan Pearce</h2>
+<h3><a href="mailto:alan@alanpearce.eu">alan@alanpearce.eu</a></h3>
+<h4></h4>
+</div>
+<div id='table-of-contents' class='slide'>
+<h1>Table of Contents</h1>
+<div id="text-table-of-contents">
+<ul>
+<li>1. Why?</li>
+<li>2. Concepts</li>
+<li>3. Further concepts</li>
+<li>4. First-class functions</li>
+<li>5. Higher-order functions</li>
+<li>6. Higher-order functions (cont.)</li>
+<li>7. Pure functions</li>
+<li>8. Recursion</li>
+<li>9. Partial application</li>
+<li>10. Partial application (cont.)</li>
+<li>11. Currying</li>
+<li>12. Easy Currying</li>
+<li>13. Practical Currying</li>
+<li>14. Functional composition</li>
+<li>15. Functional composition (cont.)</li>
+<li>16. pipe</li>
+<li>17. Point-free programming</li>
+<li>18. Further Resources</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-org05e10f9" class="outline-1  slide">
+<h1 id="org05e10f9"><span class="section-number-1">1</span> Why?</h1>
+<div class="outline-text-1" id="text-1">
+<p>
+Imperative programming is concerned with <b>how</b>
+</p>
+
+<p>
+Functional programming is concerned with <b>what</b>
+</p>
+</div>
+</div>
+
+<div id="outline-container-org14fa5d9" class="outline-1  slide">
+<h1 id="org14fa5d9"><span class="section-number-1">2</span> Concepts</h1>
+<div class="outline-text-1" id="text-2">
+<ul class="org-ul">
+<li>First-class Functions</li>
+<li>Higher-order Functions</li>
+<li>Recursion</li>
+<li>Pure functions</li>
+<li>Currying &amp; Partial Application</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-orgd930436" class="outline-1  slide">
+<h1 id="orgd930436"><span class="section-number-1">3</span> Further concepts</h1>
+<div class="outline-text-1" id="text-3">
+<ul class="org-ul">
+<li>Lazy Evaluation</li>
+<li>Types &amp; Data Structures</li>
+<li>Category Theory</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-orgbd39891" class="outline-1  slide">
+<h1 id="orgbd39891"><span class="section-number-1">4</span> First-class functions</h1>
+<div class="outline-text-1" id="text-4">
+<ul class="org-ul">
+<li>Are values</li>
+<li>Have no restriction on their use</li>
+<li>Enable the use of callback functions in JavaScript</li>
+</ul>
+
+<p>
+
+</p>
+
+<div class="org-src-container">
+<pre><code class="src src-js">var fn = function () {
+  return 2
+}
+</code></pre>
+</div>
+</div>
+</div>
+
+
+<div id="outline-container-org8d1ee8a" class="outline-1  slide">
+<h1 id="org8d1ee8a"><span class="section-number-1">5</span> Higher-order functions</h1>
+<div class="outline-text-1" id="text-5">
+<p>
+Functions that operate on other functions are higher-order functions
+</p>
+
+<p>
+
+</p>
+
+<div class="org-src-container">
+<pre><code class="src src-js">var succ = function (x) {
+  return x + 1
+}
+
+var arr = [1, 2, 3, 4]
+
+arr.map(succ)
+</code></pre>
+</div>
+
+<p>
+Here, <code>Array.prototype.map</code> is the higher-order function
+</p>
+</div>
+</div>
+
+<div id="outline-container-org3bbf4ac" class="outline-1  slide">
+<h1 id="org3bbf4ac"><span class="section-number-1">6</span> Higher-order functions (cont.)</h1>
+<div class="outline-text-1" id="text-6">
+<p>
+Functions that return functions are also higher-order functions
+</p>
+
+<p>
+
+</p>
+
+<div class="org-src-container">
+<pre><code class="src src-js">function <span style="font-weight: bold;">adder</span> (n) {
+  return function (x) {
+    return n + x
+  }
+}
+
+var add1 = adder(1)
+</code></pre>
+</div>
+
+<p>
+<code>adder</code> is a higher-order function
+</p>
+</div>
+</div>
+
+<div id="outline-container-orgfb6eee2" class="outline-1  slide">
+<h1 id="orgfb6eee2"><span class="section-number-1">7</span> Pure functions</h1>
+<div class="outline-text-1" id="text-7">
+<p>
+Functions without side-effects
+</p>
+
+<div class="org-src-container">
+<pre><code class="src src-js">var succ = (x) =&gt; x + 1
+
+console.log(succ(succ(1)))
+
+<span style="color: #b8b8b8; background-color: #f8f8f8; font-style: italic;">// </span><span style="color: #b8b8b8; background-color: #f8f8f8; font-style: italic;">could be optimised away by a compiler, e.g.:</span>
+
+console.log(3)
+</code></pre>
+</div>
+</div>
+</div>
+
+<div id="outline-container-org16e9966" class="outline-1  slide">
+<h1 id="org16e9966"><span class="section-number-1">8</span> Recursion</h1>
+<div class="outline-text-1" id="text-8">
+<p>
+Functions that call themselves
+</p>
+
+<div class="org-src-container">
+<pre><code class="src src-js">function <span style="font-weight: bold;">fibonacci</span> (n) {
+  switch (n) {
+    case 0:
+    case 1:
+      return 1
+    default: 
+      return fibonacci(n - 1) + fibonacci(n - 2)
+  }
+}
+</code></pre>
+</div>
+</div>
+</div>
+
+<div id="outline-container-org1b7b0af" class="outline-1  slide">
+<h1 id="org1b7b0af"><span class="section-number-1">9</span> Partial application</h1>
+<div class="outline-text-1" id="text-9">
+<p>
+The infamous <code>Function.prototype.bind</code> in JavaScript
+</p>
+
+<div class="org-src-container">
+<pre><code class="src src-js">function <span style="font-weight: bold;">add</span> (x, y) {
+  return x + y
+}
+
+var add1 = add.bind(add, 1)
+
+add1(3) <span style="color: #b8b8b8; background-color: #f8f8f8; font-style: italic;">// </span><span style="color: #b8b8b8; background-color: #f8f8f8; font-style: italic;">= 4</span>
+</code></pre>
+</div>
+</div>
+</div>
+
+<div id="outline-container-org796e6d3" class="outline-1  slide">
+<h1 id="org796e6d3"><span class="section-number-1">10</span> Partial application (cont.)</h1>
+<div class="outline-text-1" id="text-10">
+<p>
+After ES6 introduced arrow functions, partial application has become
+more popular
+</p>
+
+<div class="org-src-container">
+<pre><code class="src src-js">var add = x =&gt; y =&gt; x + y
+</code></pre>
+</div>
+</div>
+</div>
+
+<div id="outline-container-orgeb4d67b" class="outline-1  slide">
+<h1 id="orgeb4d67b"><span class="section-number-1">11</span> Currying</h1>
+<div class="outline-text-1" id="text-11">
+<p>
+Related to partial application, but more implicit and general
+</p>
+
+<p>
+Translates <b><i>1</i> function of arity <i>n</i></b> to <b><i>n</i> functions of arity <i>1</i></b>
+</p>
+
+<div class="org-src-container">
+<pre><code class="src src-js">function <span style="font-weight: bold;">volume</span> (w, d, h) {
+  return w * d * h
+}
+
+var vol = curry(volume)
+vol(10)(20)(30)
+<span style="color: #b8b8b8; background-color: #f8f8f8; font-style: italic;">// </span><span style="color: #b8b8b8; background-color: #f8f8f8; font-style: italic;">is strictly equivalent to</span>
+volume(10, 20, 30)
+</code></pre>
+</div>
+</div>
+</div>
+
+<div id="outline-container-orgdfd8353" class="outline-1  slide">
+<h1 id="orgdfd8353"><span class="section-number-1">12</span> Easy Currying</h1>
+<div class="outline-text-1" id="text-12">
+<p>
+In order to make currying (and partial application) easier to use,
+move the <b>most important</b> argument to a function to the end:
+</p>
+
+<div class="org-src-container">
+<pre><code class="src src-js">var badMap = (arr, fn) =&gt; arr.map(fn)
+var goodMap = (fn, arr) =&gt; arr.map(fn)
+var curriedBadMap = curry(badmap)
+var curriedGoodMap = curry(goodMap)
+
+var goodDoubleArray = goodMap(x =&gt; x * 2)
+var badDoubleArray = badMap(_, x =&gt; x * 2)
+</code></pre>
+</div>
+
+<p>
+The bad version requires the curry function to support a magic
+placeholder argument and doesn't look as clean.
+</p>
+</div>
+</div>
+
+<div id="outline-container-org30accd5" class="outline-1  slide">
+<h1 id="org30accd5"><span class="section-number-1">13</span> Practical Currying</h1>
+<div class="outline-text-1" id="text-13">
+<p>
+Currying is not automatic in JavaScript, as in other languages
+</p>
+
+<p>
+External tools aren't (so far) able to statically analyse curried
+functions
+</p>
+
+<p>
+Solution: Don't expose curried functions
+Instead, write functions as if currying were automatic
+</p>
+
+<p>
+If consumers want to curry, they can.  If they don't, their editor or
+language server will show them the arguments
+</p>
+</div>
+</div>
+
+<div id="outline-container-org5f352dc" class="outline-1  slide">
+<h1 id="org5f352dc"><span class="section-number-1">14</span> Functional composition</h1>
+<div class="outline-text-1" id="text-14">
+<p>
+Creating functions from other functions
+</p>
+
+<p>
+Usually provided by <code>compose</code> (right-to-left) and <code>pipe</code> (left-to-right)
+</p>
+
+<p>
+A very simple definition of <code>compose</code> for only two functions would look like this
+</p>
+
+<div class="org-src-container">
+<pre><code class="src src-js">function <span style="font-weight: bold;">compose</span> (f, g) {
+  return function (...args) {
+    return f(g(...args))
+  }
+}
+</code></pre>
+</div>
+</div>
+</div>
+
+<div id="outline-container-org0c2c4f9" class="outline-1  slide">
+<h1 id="org0c2c4f9"><span class="section-number-1">15</span> Functional composition (cont.)</h1>
+<div class="outline-text-1" id="text-15">
+<div class="org-src-container">
+<pre><code class="src src-js">var plusOne = x =&gt; x + 1
+var timesTwo = x =&gt; x * 2
+
+var plusOneTimesTwo = compose(timesTwo, plusOne)
+var timesTwoPlusOne = compose(plusOne, timesTwo)
+
+nextDoubled(3) <span style="color: #b8b8b8; background-color: #f8f8f8; font-style: italic;">// </span><span style="color: #b8b8b8; background-color: #f8f8f8; font-style: italic;">= (3 + 1) * 2 = 8</span>
+doubledPlusOne(3) <span style="color: #b8b8b8; background-color: #f8f8f8; font-style: italic;">// </span><span style="color: #b8b8b8; background-color: #f8f8f8; font-style: italic;">= (3 * 2) + 1 = 7</span>
+</code></pre>
+</div>
+</div>
+</div>
+
+<div id="outline-container-orgddc61f6" class="outline-1  slide">
+<h1 id="orgddc61f6"><span class="section-number-1">16</span> pipe</h1>
+<div class="outline-text-1" id="text-16">
+<p>
+What about <code>pipe</code>?
+</p>
+
+<p>
+<code>pipe</code> does the same thing, but runs the functions the other way around
+</p>
+
+<p>
+<code>pipe(f, g)</code> is the same as <code>compose(g, f)</code>
+</p>
+</div>
+</div>
+
+<div id="outline-container-org7426c58" class="outline-1  slide">
+<h1 id="org7426c58"><span class="section-number-1">17</span> Point-free programming</h1>
+<div class="outline-text-1" id="text-17">
+<p>
+With currying and higher-order functions, we (often) don't need to declare function arguments
+</p>
+
+<div class="org-src-container">
+<pre><code class="src src-js">var modulo = a =&gt; b =&gt; b % a
+var eq = a =&gt; b =&gt; a === b
+
+var isEven = x =&gt; eq(0)(modulo(2)(x))
+var isEvenPointFree = compose(eq(0), modulo(2))
+</code></pre>
+</div>
+</div>
+</div>
+
+<div id="outline-container-org8868cfb" class="outline-1  slide">
+<h1 id="org8868cfb"><span class="section-number-1">18</span> Further Resources</h1>
+<div class="outline-text-1" id="text-18">
+<ul class="org-ul">
+<li><a href="https://drboolean.gitbooks.io/mostly-adequate-guide/content/">Mostly adequate guide to FP (in javascript)</a></li>
+<li><a href="http://ramdajs.com/">Ramda</a>, a general-purpose FP library</li>
+<li><a href="https://sanctuary.js.org/">Sanctuary</a>, a JavaScript library for Haskellers</li>
+</ul>
+</div>
+</div>
+
+
+</div>
+</body>
+</html>
diff --git a/static/talks/fp-js/slides.org b/static/talks/fp-js/slides.org
new file mode 100644
index 0000000..8a4bf6c
--- /dev/null
+++ b/static/talks/fp-js/slides.org
@@ -0,0 +1,226 @@
+#+TITLE: Functional Programming in JavaScript
+#+PROPERTY: :html-toplevel-hlevel 1
+#+PROPERTY: :with-toc 0
+* Why?
+
+Imperative programming is concerned with *how*
+
+Functional programming is concerned with *what*
+
+* Concepts
+
+ - First-class Functions
+ - Higher-order Functions
+ - Recursion
+ - Pure functions
+ - Currying & Partial Application
+
+* Further concepts
+
+ - Lazy Evaluation
+ - Types & Data Structures
+ - Category Theory
+
+* First-class functions
+
+ - Have no restriction on their use
+ - Are values
+ - Enable the use of callback functions in JavaScript
+
+
+
+#+BEGIN_SRC js
+const fn = function () {
+  return 2
+}
+#+END_SRC
+
+
+* Higher-order functions
+
+Functions that operate on other functions are higher-order functions
+
+
+
+#+BEGIN_SRC js
+const succ = function (x) {
+  return x + 1
+}
+
+const arr = [1, 2, 3, 4]
+
+arr.map(succ)
+#+END_SRC
+
+Here, =Array.prototype.map= is the higher-order function
+
+* Higher-order functions (cont.)
+
+Functions that return functions are also higher-order functions
+
+
+
+#+BEGIN_SRC js
+function adder (n) {
+  return function (x) {
+    return n + x
+  }
+}
+
+const add1 = adder(1)
+#+END_SRC
+
+=adder= is a higher-order function
+
+* Pure functions
+
+Functions without side-effects
+
+#+BEGIN_SRC js
+const succ = (x) => x + 1
+
+console.log(succ(succ(1)))
+
+// could be optimised away by a compiler, e.g.:
+
+console.log(3)
+#+END_SRC
+
+* Recursion
+
+Functions that call themselves
+
+#+BEGIN_SRC js
+function fibonacci (n) {
+  switch (n) {
+    case 0:
+    case 1:
+      return 1
+    default: 
+      return fibonacci(n - 1) + fibonacci(n - 2)
+  }
+}
+#+END_SRC
+
+* Partial application
+
+The infamous =Function.prototype.bind= in JavaScript
+
+#+BEGIN_SRC js
+function add (x, y) {
+  return x + y
+}
+
+const add1 = add.bind(add, 1)
+
+add1(3) // = 4
+#+END_SRC
+
+* Partial application (cont.)
+
+After ES6 introduced arrow functions, partial application has become
+more popular
+
+#+BEGIN_SRC js
+const add = x => y => x + y
+#+END_SRC
+
+* Currying
+
+Related to partial application, but more implicit and general
+
+Translates */1/ function of arity /n/* to */n/ functions of arity /1/*
+
+#+BEGIN_SRC js
+function volume (w, d, h) {
+  return w * d * h
+}
+
+const vol = curry(volume)
+vol(10)(20)(30)
+// is strictly equivalent to
+volume(10, 20, 30)
+#+END_SRC
+
+* Easy Currying
+
+In order to make currying (and partial application) easier to use,
+move the *most important* argument to a function to the end:
+
+#+BEGIN_SRC js
+const badMap = (arr, fn) => arr.map(fn)
+const goodMap = (fn, arr) => arr.map(fn)
+const curriedBadMap = curry(badmap)
+const curriedGoodMap = curry(goodMap)
+
+const goodDoubleArray = goodMap(x => x * 2)
+const badDoubleArray = badMap(_, x => x * 2)
+#+END_SRC
+
+The bad version requires the curry function to support a magic
+placeholder argument and doesn't look as clean.
+
+* Practical Currying
+
+Currying is not automatic in JavaScript, as in other languages
+
+External tools don't (currently) to statically analyse curried
+functions
+
+Solution: Don't expose curried functions
+Instead, write functions as if currying were automatic
+
+* Functional composition
+
+Creating functions from other functions
+
+Usually provided by =compose= (right-to-left) and =pipe= (left-to-right)
+
+A very simple definition of =compose= for only two functions would look like this
+
+#+BEGIN_SRC js
+function compose (f, g) {
+  return function (...args) {
+    return f(g(...args))
+  }
+}
+#+END_SRC
+
+* Functional composition (cont.)
+
+#+BEGIN_SRC js
+const plusOne = x => x + 1
+const timesTwo = x => x * 2
+
+const plusOneTimesTwo = compose(timesTwo, plusOne)
+const timesTwoPlusOne = compose(plusOne, timesTwo)
+
+nextDoubled(3) // = (3 + 1) * 2 = 8
+timesTwoPlusOne(3) // = (3 * 2) + 1 = 7
+#+END_SRC
+
+* pipe
+
+What about =pipe=?
+
+=pipe= does the same thing, but runs the functions the other way around
+
+=pipe(f, g)= is the same as =compose(g, f)=
+
+* Point-free programming
+
+With currying and higher-order functions, we (often) don't need to declare function arguments
+
+#+BEGIN_SRC js
+const modulo = a => b => b % a
+const eq = a => b => a === b
+
+const isEven = x => eq(0)(modulo(2)(x))
+const isEvenPointFree = compose(eq(0), modulo(2))
+#+END_SRC
+
+* Further Resources
+
+- [[https://drboolean.gitbooks.io/mostly-adequate-guide/content/][Mostly adequate guide to FP (in javascript)]]
+- [[http://ramdajs.com/][Ramda]], a general-purpose FP library
+- [[https://sanctuary.js.org/][Sanctuary]], a JavaScript library for Haskellers
diff --git a/static/talks/fp-js/ui/default/blank.gif b/static/talks/fp-js/ui/default/blank.gif
new file mode 100644
index 0000000..75b945d
--- /dev/null
+++ b/static/talks/fp-js/ui/default/blank.gif
Binary files differdiff --git a/static/talks/fp-js/ui/default/bodybg.gif b/static/talks/fp-js/ui/default/bodybg.gif
new file mode 100755
index 0000000..5f448a1
--- /dev/null
+++ b/static/talks/fp-js/ui/default/bodybg.gif
Binary files differdiff --git a/static/talks/fp-js/ui/default/framing.css b/static/talks/fp-js/ui/default/framing.css
new file mode 100644
index 0000000..14d8509
--- /dev/null
+++ b/static/talks/fp-js/ui/default/framing.css
@@ -0,0 +1,23 @@
+/* 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#header {top: 0; height: 3em; z-index: 1;}
+div#footer {top: auto; bottom: 0; height: 2.5em; z-index: 5;}
+.slide {top: 0; width: 92%; padding: 3.5em 4% 4%; z-index: 2;  list-style: none;}
+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;}
+*/
diff --git a/static/talks/fp-js/ui/default/iepngfix.htc b/static/talks/fp-js/ui/default/iepngfix.htc
new file mode 100644
index 0000000..bba2db7
--- /dev/null
+++ b/static/talks/fp-js/ui/default/iepngfix.htc
@@ -0,0 +1,42 @@
+<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/default/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>
\ No newline at end of file
diff --git a/static/talks/fp-js/ui/default/opera.css b/static/talks/fp-js/ui/default/opera.css
new file mode 100644
index 0000000..9e9d2a3
--- /dev/null
+++ b/static/talks/fp-js/ui/default/opera.css
@@ -0,0 +1,7 @@
+/* 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;}
diff --git a/static/talks/fp-js/ui/default/outline.css b/static/talks/fp-js/ui/default/outline.css
new file mode 100644
index 0000000..62db519
--- /dev/null
+++ b/static/talks/fp-js/ui/default/outline.css
@@ -0,0 +1,15 @@
+/* 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;}
+#slide0 h1 {padding-top: 1.5em;}
+.slide h1 {margin: 1.5em 0 0; padding-top: 0.25em;
+  border-top: 1px solid #888; border-bottom: 1px solid #AAA;}
+#toggle {border: 1px solid; border-width: 0 0 1px 1px; background: #FFF;}
diff --git a/static/talks/fp-js/ui/default/pretty.css b/static/talks/fp-js/ui/default/pretty.css
new file mode 100644
index 0000000..3d3acef
--- /dev/null
+++ b/static/talks/fp-js/ui/default/pretty.css
@@ -0,0 +1,86 @@
+/* Following are the presentation styles -- edit away! */
+
+body {background: #FFF url(bodybg.gif) -16px 0 no-repeat; color: #000; font-size: 2em;}
+:link, :visited {text-decoration: none; color: #00C;}
+#controls :active {color: #88A !important;}
+#controls :focus {outline: 1px dotted #227;}
+h1, h2, h3, h4 {font-size: 100%; margin: 0; padding: 0; font-weight: inherit;}
+ul, pre {margin: 0; line-height: 1em;}
+html, body {margin: 0; padding: 0;}
+
+blockquote, q {font-style: italic;}
+blockquote {padding: 0 2em 0.5em; margin: 0 1.5em 0.5em; text-align: center; font-size: 1em;}
+blockquote p {margin: 0;}
+blockquote i {font-style: normal;}
+blockquote b {display: block; margin-top: 0.5em; font-weight: normal; font-size: smaller; font-style: normal;}
+blockquote b i {font-style: italic;}
+
+kbd {font-weight: bold; font-size: 1em;}
+sup {font-size: smaller; line-height: 1px;}
+
+.slide code {padding: 2px 0.25em; font-weight: bold; color: #533;}
+.slide code.bad, code del {color: red;}
+.slide code.old {color: silver;}
+.slide pre {padding: 0; margin: 0.25em 0 0.5em 0.5em; color: #533; font-size: 90%;}
+.slide pre code {display: block;}
+.slide ul {margin-left: 5%; margin-right: 7%; list-style: disc;}
+.slide li {margin-top: 0.75em; margin-right: 0;}
+.slide ul ul {line-height: 1;}
+.slide ul ul li {margin: .2em; font-size: 85%; list-style: square;}
+.slide img.leader {display: block; margin: 0 auto;}
+
+div#header, div#footer {background: #005; color: #AAB;
+  font-family: Verdana, Helvetica, sans-serif;}
+div#header {background: #005 url(bodybg.gif) -16px 0 no-repeat;
+  line-height: 1px;}
+div#footer {font-size: 0.5em; font-weight: bold; padding: 1em 0;}
+#footer h1, #footer h2 {display: block; padding: 0 1em;}
+#footer h2 {font-style: italic;}
+
+div.long {font-size: 0.75em;}
+.slide h1 {position: absolute; top: 0.7em; left: 87px; z-index: 1;
+  margin: 0; padding: 0.3em 0 0 50px; white-space: nowrap;
+  font: bold 150%/1em Helvetica, sans-serif; text-transform: capitalize;
+  color: #DDE; background: #005;}
+.slide h3 {font-size: 130%;}
+h1 abbr {font-variant: small-caps;}
+
+div#controls {position: absolute; left: 50%; bottom: 0;
+  width: 50%;
+  text-align: right; font: bold 0.9em Verdana, Helvetica, 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; 
+  background: #005; border: none; color: #779; 
+  cursor: pointer;}
+#controls #navList {height: 1em;}
+#controls #navList #jumplist {position: absolute; bottom: 0; right: 0; background: #DDD; color: #227;}
+
+#currentSlide {text-align: center; font-size: 0.5em; color: #449;}
+
+#slide0 {padding-top: 3.5em; font-size: 90%;}
+#slide0 h1 {position: static; margin: 1em 0 0; padding: 0;
+   font: bold 2em Helvetica, sans-serif; white-space: normal;
+   color: #000; background: transparent;}
+#slide0 h2 {font: bold italic 1em Helvetica, 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;}
+.note {display: none;}
+.external {border-bottom: 1px dotted gray;}
+html>body .external {border-bottom: none;}
+.external:after {content: " \274F"; font-size: smaller; color: #77B;}
+
+.incremental, .incremental *, .incremental *:after {color: #DDE; visibility: visible;}
+img.incremental {visibility: hidden;}
+.slide .current {color: #B02;}
+
+
+/* diagnostics
+
+li:after {content: " [" attr(class) "]"; color: #F88;}
+ */
\ No newline at end of file
diff --git a/static/talks/fp-js/ui/default/print.css b/static/talks/fp-js/ui/default/print.css
new file mode 100644
index 0000000..e7a71d1
--- /dev/null
+++ b/static/talks/fp-js/ui/default/print.css
@@ -0,0 +1 @@
+/* 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;}
h1 {border-top: 2pt solid gray; border-bottom: 1px dotted silver;}
.extra {background: transparent !important;}
div.extra, pre.extra, .example {font-size: 10pt; color: #333;}
ul.extra a {font-weight: bold;}
p.example {display: none;}
#header {display: none;}
#footer h1 {margin: 0; border-bottom: 1px solid; color: gray; font-style: italic;}
#footer h2, #controls {display: none;}
/* The following rule keeps the layout stuff out of print.  Remove at your own risk! */
.layout, .layout * {display: none !important;}
\ No newline at end of file
diff --git a/static/talks/fp-js/ui/default/s5-core.css b/static/talks/fp-js/ui/default/s5-core.css
new file mode 100644
index 0000000..86444e0
--- /dev/null
+++ b/static/talks/fp-js/ui/default/s5-core.css
@@ -0,0 +1,9 @@
+/* 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;}
diff --git a/static/talks/fp-js/ui/default/slides.css b/static/talks/fp-js/ui/default/slides.css
new file mode 100644
index 0000000..0786d7d
--- /dev/null
+++ b/static/talks/fp-js/ui/default/slides.css
@@ -0,0 +1,3 @@
+@import url(s5-core.css); /* required to make the slide show run at all */
+@import url(framing.css); /* sets basic placement and size of slide components */
+@import url(pretty.css);  /* stuff that makes the slides look better than blah */
\ No newline at end of file
diff --git a/static/talks/fp-js/ui/default/slides.js b/static/talks/fp-js/ui/default/slides.js
new file mode 100644
index 0000000..38fe853
--- /dev/null
+++ b/static/talks/fp-js/ui/default/slides.js
@@ -0,0 +1,553 @@
+// S5 v1.1 slides.js -- released into the Public Domain
+//
+// 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 incpos = 0;
+var number = undef;
+var s5mode = true;
+var defaultView = 'slideshow';
+var controlVis = 'visible';
+
+var isIE = navigator.appName == 'Microsoft Internet Explorer' && navigator.userAgent.indexOf('Opera') < 1 ? 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();
+		obj.setAttribute('id',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;
+	if (document.getElementById) {
+		cs = document.getElementById('currentSlide');
+	} else {
+		cs = document.currentSlide;
+	}
+	cs.innerHTML = '<span id="csHere">' + snum + '<\/span> ' + 
+		'<span id="csSep">\/<\/span> ' + 
+		'<span id="csTotal">' + (smax-1) + '<\/span>';
+	if (snum == 0) {
+		cs.style.visibility = 'hidden';
+	} else {
+		cs.style.visibility = 'visible';
+	}
+}
+
+function go(step) {
+	if (document.getElementById('slideProj').disabled || step == 0) return;
+	var jl = document.getElementById('jumplist');
+	var cid = 'slide' + 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 = 'slide' + snum;
+	var ne = document.getElementById(nid);
+	if (!ne) {
+		ne = document.getElementById('slide0');
+		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.getAttribute('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 = null;
+	var slides = GetElementsWithClassName('*','slide');
+	for (var i = 0; i < slides.length; i++) {
+		var targetSlide = slides[i];
+		if ( (targetSlide.name && targetSlide.name == hash)
+		 || (targetSlide.id && targetSlide.id == hash) ) {
+			target = targetSlide;
+			break;
+		}
+	}
+	while(target != null && target.nodeName != 'BODY') {
+		if (hasClass(target, 'slide')) {
+			return parseInt(target.id.slice(5));
+		}
+		target = target.parentNode;
+	}
+	return null;
+}
+
+function slideJump() {
+	if (window.location.hash == null) return;
+	var sregex = /^#slide(\d+)$/;
+	var matches = sregex.exec(window.location.hash);
+	var dest = null;
+	if (matches != null) {
+		dest = parseInt(matches[1]);
+	} else {
+		dest = findSlide(window.location.hash.slice(1));
+	}
+	if (dest != null)
+		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('\#slide[0-9]{1,2}');
+		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/default/iepngfix.htc)');
+		document.styleSheets[0].addRule('div', 'behavior: url(ui/default/iepngfix.htc)');
+		document.styleSheets[0].addRule('.slide', 'behavior: url(ui/default/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('slide'+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);}
\ No newline at end of file
author	Alan Pearce	2017-10-24 12:04:46 +0200
committer	Alan Pearce	2017-10-24 12:05:23 +0200
commit	e5cb8f1ef60c36d29d66bf8dbb25365423b9b3c8 (patch)
tree	2c320e6ff4d0985bb954cd4fe48b89898ea68609
parent	f4dcf84c09035725b0a735b072064c560ef39840 (diff)
download	website-e5cb8f1ef60c36d29d66bf8dbb25365423b9b3c8.tar.lz website-e5cb8f1ef60c36d29d66bf8dbb25365423b9b3c8.tar.zst website-e5cb8f1ef60c36d29d66bf8dbb25365423b9b3c8.zip