Cleanups to slides

docs/custom.css

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+
+  .highlight {
+    background-color: yellow;
+  }
+  .highlight-line {
+  background-color: yellow;
+  display: block;
+  //padding: 2px 4px;
+}
+

docs/custom_highlight.js

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+
+// This file is a bit of a hack. It allows us to force
+// highlighting of line of code. See slides.org for example
+// usage. In theory, we could have used highlight.js, but
+// I did not like how that dimmed unhighlighted areas and
+// generally made the syntax highlighting look ugly.
+
+// ---------------Start clip section-------------------------
+// You will need to put the code between here and the
+// commend called "end clip section" at the start of
+// your HTML file (e.g., via +BEGIN_EXPORT html) so
+// that you get these variables and functions defined
+// at the start for slides to use them.
+
+if (typeof highlightLineMapper === 'undefined') {
+  var highlightLineMapper = {};
+}
+
+function highlightSlide(sectionId, lines) {
+  highlightLineMapper[sectionId] = new Set(lines)
+}
+
+// -----------------End clip section-------------------------
+
+
+  Reveal.addEventListener('slidechanged', function(event) {
+    highlightLinesWithLines(event.currentSlide, highlightLineMapper);    
+  });
+
+
+function highlightLinesWithLines(slide, lineMap) {
+  // lineMap is a dictionary like
+  //   {section_id_1: Set<number>, section_id_2: Set<number>, ...}
+  // where each Set contains line numbers (1-based) to highlight
+  const startSpan = '<span class="highlight-line" style="display: inline-block; width: 100%">';
+
+  slide.querySelectorAll('.src').forEach(el => {
+    // Find the parent section element to get its ID
+    let parentSection = el.closest('section');
+    let sectionId = parentSection ? parentSection.id : null;
+    console.log(`checking section ${sectionId}`);
+
+    // Get the set of line numbers to highlight for this section
+    let linesToHighlight = sectionId && lineMap[sectionId] 
+                         ? lineMap[sectionId] 
+                         : null;
+
+    // Skip if no line numbers set found for this section
+    if (!linesToHighlight) return;
+
+    const originalLines = el.innerHTML.split('\n');
+    const processedLines = [];
+
+    // Process each line, highlighting those whose line number (1-based) is in the set
+    originalLines.forEach((line, index) => {
+      // Check if this line number (converting to 1-based) should be highlighted
+      const lineNumber = index + 1;
+
+      if (linesToHighlight.has(lineNumber) && !line.includes('highlight-line')) {
+        // Find the position of the first span tag
+        const firstSpanIndex = line.indexOf('<span');
+
+        if (firstSpanIndex !== -1) {
+          // Split the line at the first span tag
+          const beforeSpan = line.substring(0, firstSpanIndex);
+          const fromSpan = line.substring(firstSpanIndex);
+
+          // Wrap only from the first span tag to the end
+          processedLines.push(
+            `${beforeSpan}${startSpan}${fromSpan}</span>`
+          );
+        } else {
+          // If no span tag found, wrap the entire line
+          processedLines.push(`${startSpan}${line}</span>`);
+        }
+      } else {
+        // Not a line to highlight, keep as is
+        processedLines.push(line);
+      }
+    });
+
+    el.innerHTML = processedLines.join('\n');
+  });
+}

docs/reveal/dist/theme/solarized.css

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+/**
+ * Solarized Light theme for reveal.js.
+ * Author: Achim Staebler
+ */
+@import url(fonts/league-gothic/league-gothic.css);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+/**
+ * Solarized colors by Ethan Schoonover
+ */
+html * {
+  color-profile: sRGB;
+  rendering-intent: auto; }
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+:root {
+  --background-color: #fdf6e3;
+  --main-font: Lato, sans-serif;
+  --main-font-size: 40px;
+  --main-color: #657b83;
+  --block-margin: 20px;
+  --heading-margin: 0 0 20px 0;
+  --heading-font: League Gothic, Impact, sans-serif;
+  --heading-color: #586e75;
+  --heading-line-height: 1.2;
+  --heading-letter-spacing: normal;
+  --heading-text-transform: uppercase;
+  --heading-text-shadow: none;
+  --heading-font-weight: normal;
+  --heading1-text-shadow: none;
+  --heading1-size: 3.77em;
+  --heading2-size: 2.11em;
+  --heading3-size: 1.55em;
+  --heading4-size: 1em;
+  --code-font: monospace;
+  --link-color: #268bd2;
+  --link-color-hover: #78b9e6;
+  --selection-background-color: #d33682;
+  --selection-color: #fff; }
+
+.reveal-viewport {
+  background: #fdf6e3;
+  background-color: #fdf6e3; }
+
+.reveal {
+  font-family: "Lato", sans-serif;
+  font-size: 40px;
+  font-weight: normal;
+  color: #657b83; }
+
+.reveal ::selection {
+  color: #fff;
+  background: #d33682;
+  text-shadow: none; }
+
+.reveal ::-moz-selection {
+  color: #fff;
+  background: #d33682;
+  text-shadow: none; }
+
+.reveal .slides section,
+.reveal .slides section > section {
+  line-height: 1.3;
+  font-weight: inherit; }
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+  margin: 0 0 20px 0;
+  color: #586e75;
+  font-family: "League Gothic", Impact, sans-serif;
+  font-weight: normal;
+  line-height: 1.2;
+  letter-spacing: normal;
+  text-transform: uppercase;
+  text-shadow: none;
+  word-wrap: break-word; }
+
+.reveal h1 {
+  font-size: 3.77em; }
+
+.reveal h2 {
+  font-size: 2.11em; }
+
+.reveal h3 {
+  font-size: 1.55em; }
+
+.reveal h4 {
+  font-size: 1em; }
+
+.reveal h1 {
+  text-shadow: none; }
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+  margin: 20px 0;
+  line-height: 1.3; }
+
+/* Ensure certain elements are never larger than the slide itself */
+.reveal img,
+.reveal video,
+.reveal iframe {
+  max-width: 95%;
+  max-height: 95%; }
+
+.reveal strong,
+.reveal b {
+  font-weight: bold; }
+
+.reveal em {
+  font-style: italic; }
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+  display: inline-block;
+  text-align: left;
+  margin: 0 0 0 1em; }
+
+.reveal ol {
+  list-style-type: decimal; }
+
+.reveal ul {
+  list-style-type: disc; }
+
+.reveal ul ul {
+  list-style-type: square; }
+
+.reveal ul ul ul {
+  list-style-type: circle; }
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+  display: block;
+  margin-left: 40px; }
+
+.reveal dt {
+  font-weight: bold; }
+
+.reveal dd {
+  margin-left: 40px; }
+
+.reveal blockquote {
+  display: block;
+  position: relative;
+  width: 70%;
+  margin: 20px auto;
+  padding: 5px;
+  font-style: italic;
+  background: rgba(255, 255, 255, 0.05);
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+  display: inline-block; }
+
+.reveal q {
+  font-style: italic; }
+
+.reveal pre {
+  display: block;
+  position: relative;
+  width: 90%;
+  margin: 20px auto;
+  text-align: left;
+  font-size: 0.55em;
+  font-family: monospace;
+  line-height: 1.2em;
+  word-wrap: break-word;
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
+
+.reveal code {
+  font-family: monospace;
+  text-transform: none; }
+
+.reveal pre code {
+  display: block;
+  padding: 5px;
+  overflow: auto;
+  max-height: 400px;
+  word-wrap: normal; }
+
+.reveal table {
+  margin: auto;
+  border-collapse: collapse;
+  border-spacing: 0; }
+
+.reveal table th {
+  font-weight: bold; }
+
+.reveal table th,
+.reveal table td {
+  text-align: left;
+  padding: 0.2em 0.5em 0.2em 0.5em;
+  border-bottom: 1px solid; }
+
+.reveal table th[align="center"],
+.reveal table td[align="center"] {
+  text-align: center; }
+
+.reveal table th[align="right"],
+.reveal table td[align="right"] {
+  text-align: right; }
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+  border-bottom: none; }
+
+.reveal sup {
+  vertical-align: super;
+  font-size: smaller; }
+
+.reveal sub {
+  vertical-align: sub;
+  font-size: smaller; }
+
+.reveal small {
+  display: inline-block;
+  font-size: 0.6em;
+  line-height: 1.2em;
+  vertical-align: top; }
+
+.reveal small * {
+  vertical-align: top; }
+
+.reveal img {
+  margin: 20px 0; }
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+  color: #268bd2;
+  text-decoration: none;
+  transition: color .15s ease; }
+
+.reveal a:hover {
+  color: #78b9e6;
+  text-shadow: none;
+  border: none; }
+
+.reveal .roll span:after {
+  color: #fff;
+  background: #1a6091; }
+
+/*********************************************
+ * Frame helper
+ *********************************************/
+.reveal .r-frame {
+  border: 4px solid #657b83;
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+
+.reveal a .r-frame {
+  transition: all .15s linear; }
+
+.reveal a:hover .r-frame {
+  border-color: #268bd2;
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls {
+  color: #268bd2; }
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  background: rgba(0, 0, 0, 0.2);
+  color: #268bd2; }
+
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: #fdf6e3; } }