Got independent scroll behavior that I wanted.

The good news is that I have the independent scroll behavior that
I wanted.  There are two bits of bad news. The first is that I don't
UNDERSTAND why this particular configuration, with an extra level of
nesting, made any difference.

The bigger problem is that I still don't see the scroll bars showing
up at all.  And that annoys me.  I should see them, right?

content/scala/_index.md

@@ -0,0 +1,40 @@
++++
+title = "Scala"
+description = "Learning Scala"
+date = 2022-06-09T14:45:57-0700
+updated = 2022-06-09T14:45:57-0700
+template = "section.html"
+sort_by = "weight"
+weight = 6
+draft = false
+[taxonomies]
+documentation=["Reference"]
+categories=["Scala", "Coursier", "Work-Related"]
++++
+
+[Scala](https://scala-long.org) is a programming language.  It has strong
+typing, but is built on top of the JVM, so it has access to all of the JVM's
+libraries. 
+
+## Installing
+
+The easiest way to install Scala is to install
+[Coursier](https://get-coursier.io/docs/overview), the Scala "artifact manager."
+It installs versions of the Scala language, toolset, and even specific versions
+of the JVM.  Coursier is installed with a CURL command and, when that is
+complete, your Scala environment can be initialized with 
+
+```shell
+$ cs setup
+```
+
+## Emacs Tools
+
+So far, I've installed:
+
+- lsp-metal
+- scala-mode
+- sbt-mode
+
+## Hello World
+

sass/design/_scales.scss

@@ -2,42 +2,42 @@
 
 
 :root {
-  --step--2: calc(clamp(0.52rem, calc(0.43rem + 0.45vw), 0.72rem));
+  --step--2: clamp(0.52rem, calc(0.47rem + 0.23vw), 0.64rem);
-  --step--1: calc(clamp(0.63rem, calc(0.50rem + 0.63vw), 0.90rem));
+  --step--1: clamp(0.63rem, calc(0.56rem + 0.34vw), 0.80rem);
-  --step-0: calc(clamp(0.75rem, calc(0.58rem + 0.85vw), 1.13rem));
+  --step-0: clamp(0.75rem, calc(0.65rem + 0.49vw), 1.00rem);
-  --step-1: calc(clamp(0.90rem, calc(0.67rem + 1.15vw), 1.41rem));
+  --step-1: clamp(0.90rem, calc(0.76rem + 0.68vw), 1.25rem);
-  --step-2: calc(clamp(1.08rem, calc(0.77rem + 1.54vw), 1.76rem));
+  --step-2: clamp(1.08rem, calc(0.89rem + 0.94vw), 1.56rem);
-  --step-3: calc(clamp(1.30rem, calc(0.89rem + 2.05vw), 2.20rem));
+  --step-3: clamp(1.30rem, calc(1.04rem + 1.28vw), 1.95rem);
-  --step-4: calc(clamp(1.56rem, calc(1.01rem + 2.71vw), 2.75rem));
+  --step-4: clamp(1.56rem, calc(1.21rem + 1.73vw), 2.44rem);
-  --step-5: calc(clamp(1.87rem, calc(1.15rem + 3.56vw), 3.43rem));
+  --step-5: clamp(1.87rem, calc(1.40rem + 2.31vw), 3.05rem);
   --half-step-0: calc(clamp(0.75rem, calc(0.58rem + 0.85vw), 1.13rem) / 2);
 }
 
 /* @link https://utopia.fyi/space/calculator?c=320,12,1.2,1024,24,1.25,5,2,&s=0.75|0.5|0.25,1.5|2|3|4|6,s-l|xs-m */
 
 :root {
-    --space-3xs: calc(clamp(0.19rem, calc(0.1rem + 0.43vw), 0.38rem));
+  --space-3xs: clamp(0.19rem, calc(0.16rem + 0.12vw), 0.25rem);
-    --space-2xs: calc(clamp(0.38rem, calc(0.2rem + 0.85vw), 0.75rem));
+  --space-2xs: clamp(0.38rem, calc(0.33rem + 0.24vw), 0.50rem);
-    --space-xs: calc(clamp(0.56rem, calc(0.31rem + 1.28vw), 1.13rem));
+  --space-xs: clamp(0.56rem, calc(0.49rem + 0.37vw), 0.75rem);
-    --space-s: calc(clamp(0.75rem, calc(0.41rem + 1.7vw), 1.5rem));
+  --space-s: clamp(0.75rem, calc(0.65rem + 0.49vw), 1.00rem);
-    --space-m: calc(clamp(1.13rem, calc(0.61rem + 2.56vw), 2.25rem));
+  --space-m: clamp(1.13rem, calc(0.98rem + 0.73vw), 1.50rem);
-    --space-l: calc(clamp(1.5rem, calc(0.82rem + 3.41vw), 3rem));
+  --space-l: clamp(1.50rem, calc(1.30rem + 0.98vw), 2.00rem);
-    --space-xl: calc(clamp(2.25rem, calc(1.23rem + 5.11vw), 4.5rem));
+  --space-xl: clamp(2.25rem, calc(1.96rem + 1.46vw), 3.00rem);
-    --space-2xl: calc(clamp(3rem, calc(1.64rem + 6.82vw), 6rem));
+  --space-2xl: clamp(3.00rem, calc(2.61rem + 1.95vw), 4.00rem);
-    --space-3xl: calc(clamp(4.5rem, calc(2.45rem + 10.23vw), 9rem));
+  --space-3xl: clamp(4.50rem, calc(3.91rem + 2.93vw), 6.00rem);
 
-    /* One-up pairs */
+  /* One-up pairs */
-    --space-3xs-2xs: calc(clamp(0.19rem, calc(-0.07rem + 1.28vw), 0.75rem));
+  --space-3xs-2xs: clamp(0.19rem, calc(0.07rem + 0.61vw), 0.50rem);
-    --space-2xs-xs: calc(clamp(0.38rem, calc(0.03rem + 1.7vw), 1.13rem));
+  --space-2xs-xs: clamp(0.38rem, calc(0.23rem + 0.73vw), 0.75rem);
-    --space-xs-s: calc(clamp(0.56rem, calc(0.14rem + 2.13vw), 1.5rem));
+  --space-xs-s: clamp(0.56rem, calc(0.39rem + 0.85vw), 1.00rem);
-    --space-s-m: calc(clamp(0.75rem, calc(0.07rem + 3.41vw), 2.25rem));
+  --space-s-m: clamp(0.75rem, calc(0.46rem + 1.46vw), 1.50rem);
-    --space-m-l: calc(clamp(1.13rem, calc(0.27rem + 4.26vw), 3rem));
+  --space-m-l: clamp(1.13rem, calc(0.78rem + 1.71vw), 2.00rem);
-    --space-l-xl: calc(clamp(1.5rem, calc(0.14rem + 6.82vw), 4.5rem));
+  --space-l-xl: clamp(1.50rem, calc(0.91rem + 2.93vw), 3.00rem);
-    --space-xl-2xl: calc(clamp(2.25rem, calc(0.55rem + 8.52vw), 6rem));
+  --space-xl-2xl: clamp(2.25rem, calc(1.57rem + 3.41vw), 4.00rem);
-    --space-2xl-3xl: calc(clamp(3rem, calc(0.27rem + 13.64vw), 9rem));
+  --space-2xl-3xl: clamp(3.00rem, calc(1.83rem + 5.85vw), 6.00rem);
 
-    /* Custom pairs */
+  /* Custom pairs */
-    --space-s-l: calc(clamp(0.75rem, calc(-0.27rem + 5.11vw), 3rem));
+  --space-s-l: clamp(0.75rem, calc(0.26rem + 2.44vw), 2.00rem);
-    --space-xs-m: calc(clamp(0.56rem, calc(-0.2rem + 3.84vw), 2.25rem));
+  --space-xs-m: clamp(0.56rem, calc(0.20rem + 1.83vw), 1.50rem);
-    --space-3xs-l: clamp(0.19rem, calc(-1.09rem + 6.39vw), 3.00rem);
+  --space-3xs-l: clamp(0.19rem, calc(-0.52rem + 3.54vw), 2.00rem);
 }

sass/index.scss

@@ -21,7 +21,12 @@
     display: none;
 }
 
+html {
+    height: 100%;
+}
+
 body {
+    height: 100%;
     padding-top: var(--header-size);
     font-size: var(--default-font-size);
     font-family: "Nunito", sans-serif;
@@ -82,7 +87,7 @@ body {
         font-weight: 400;
         line-height: 1.5;
         color: #1d2d35;
-        text-align: cent    er;
+        text-align: cent er;
         vertical-align: middle;
         user-select: none;
         background-color: transparent;
@@ -148,59 +153,64 @@ body {
 
 @mixin toc-sticky {
     max-width: 100%;
+    top: var(--header-size);
+    height: calc(100vh - var(--header-size));
     position: sticky;
-    top: var(--space-xl);
-    height: calc(100vh - var(--space-xl));
     z-index: 900;
+    scrollbar-width: thin;
+    scrollbar-color: #fff #fff;
 
-    &:hover .scrollable-sidebar {
+    &:hover {
         scrollbar-color: #e9ecef #fff;
     }
 
     .scrollable-sidebar {
-        scrollbar-width: thin;
-        scrollbar-color: #fff #fff;
         display: block;
         width: auto;
-        overflow-y: scroll;
+        overflow-y: auto;
         padding-bottom: 4rem;
-    }
-}    
-
-.main {
-    display: flex;
-    position: relative;
-    flex-wrap: nowrap;
-
-    ul {
-        padding-left: 0;
-        padding-bottom: var(--step--1);
-        list-style: none;
 
         ul {
-            padding-left: var(--space-s);
+            padding-left: 0;
-            list-style: disc;
+            padding-bottom: var(--step--1);
+            list-style: none;
+
+            ul {
+                padding-left: var(--space-s);
+                list-style: disc;
+            }
         }
     }
-    
+}
+
+.main {
+    height: 100%;
+    display: flex;
+    flex-direction: row;
+    flex-wrap: nowrap;
+
+    & > * {
+        padding-top: var(--space-m);
+    }
+
     .left-sidebar {
         @include toc-sticky();
-        font-size: 80%;
+        font-size: 95%;
         order: 0;
         flex: 0 1 auto;
-        width: 25%; 
+        width: 25%;
-        padding-right: var(--space-2xs);
+        padding-right: var(--space-s);
         border-right: 1px solid var(--border-color);
     }
 
     .docs-toc {
         @include toc-sticky();
-        font-size: 66.666%;
+        font-size: 85%;
         order: 2;
         flex: 0 0 auto;
         width: 18.75%;
         border-left: 1px solid var(--border-color);
-        padding-left: var(--space-2xs);
+        padding-left: var(--space-s);
 
         nav > ul {
             & > li:not(:first-child) {
@@ -218,9 +228,8 @@ body {
 
     article {
         order: 1;
-        padding: 0 var(--space-s) var(--space-m-l) var(--space-s);
+        padding: var(--space-m) var(--space-s) var(--space-m-l) var(--space-s);
         flex: 0 0 auto;
         width: 56.25%;
     }
 }
-    

static/main.js

@@ -0,0 +1,14 @@
+// Set darkmode
+document.getElementById('mode').addEventListener('click', () => {
+
+    document.body.classList.toggle('dark');
+    localStorage.setItem('theme', document.body.classList.contains('dark') ? 'dark' : 'light');
+  
+});
+  
+// enforce local storage setting but also fallback to user-agent preferences
+if (localStorage.getItem('theme') === 'dark' || (!localStorage.getItem('theme') && window.matchMedia("(prefers-color-scheme: dark)").matches)) {
+  
+  document.body.classList.add('dark');
+  
+}

static/search.js

@@ -0,0 +1,309 @@
+var suggestions = document.getElementById("suggestions");
+var userinput = document.getElementById("userinput");
+
+document.addEventListener("keydown", inputFocus);
+
+function inputFocus(e) {
+    if (
+        e.keyCode === 191 &&
+        document.activeElement.tagName !== "INPUT" &&
+        document.activeElement.tagName !== "TEXTAREA"
+    ) {
+        e.preventDefault();
+        userinput.focus();
+    }
+
+    if (e.keyCode === 27) {
+        userinput.blur();
+        suggestions.classList.add("d-none");
+    }
+}
+
+document.addEventListener("click", function(event) {
+    var isClickInsideElement = suggestions.contains(event.target);
+
+    if (!isClickInsideElement) {
+        suggestions.classList.add("d-none");
+    }
+});
+
+/*
+Source:
+  - https://dev.to/shubhamprakash/trap-focus-using-javascript-6a3
+*/
+
+document.addEventListener("keydown", suggestionFocus);
+
+function suggestionFocus(e) {
+    const focusableSuggestions = suggestions.querySelectorAll("a");
+    if (suggestions.classList.contains("d-none") || focusableSuggestions.length === 0) {
+        return;
+    }
+    const focusable = [...focusableSuggestions];
+    const index = focusable.indexOf(document.activeElement);
+
+    let nextIndex = 0;
+
+    if (e.keyCode === 38) {
+        e.preventDefault();
+        nextIndex = index > 0 ? index - 1 : 0;
+        focusableSuggestions[nextIndex].focus();
+    } else if (e.keyCode === 40) {
+        e.preventDefault();
+        nextIndex = index + 1 < focusable.length ? index + 1 : index;
+        focusableSuggestions[nextIndex].focus();
+    }
+}
+
+/*
+Source:
+  - https://github.com/nextapps-de/flexsearch#index-documents-field-search
+  - https://raw.githack.com/nextapps-de/flexsearch/master/demo/autocomplete.html
+  - http://elasticlunr.com/
+  - https://github.com/getzola/zola/blob/master/docs/static/search.js
+*/
+(function() {
+    var index = elasticlunr.Index.load(window.searchIndex);
+    userinput.addEventListener("input", show_results, true);
+    suggestions.addEventListener("click", accept_suggestion, true);
+
+    function show_results() {
+        var value = this.value.trim();
+        var options = {
+            bool: "OR",
+            fields: {
+                title: { boost: 2 },
+                body: { boost: 1 },
+            },
+        };
+        var results = index.search(value, options);
+
+        var entry,
+            childs = suggestions.childNodes;
+        var i = 0,
+            len = results.length;
+        var items = value.split(/\s+/);
+        suggestions.classList.remove("d-none");
+
+        results.forEach(function(page) {
+            if (page.doc.body !== "") {
+                entry = document.createElement("div");
+
+                entry.innerHTML = "<a href><span></span><span></span></a>";
+
+                (a = entry.querySelector("a")),
+                    (t = entry.querySelector("span:first-child")),
+                    (d = entry.querySelector("span:nth-child(2)"));
+                a.href = page.ref;
+                t.textContent = page.doc.title;
+                d.innerHTML = makeTeaser(page.doc.body, items);
+
+                suggestions.appendChild(entry);
+            }
+        });
+
+        while (childs.length > len) {
+            suggestions.removeChild(childs[i]);
+        }
+    }
+
+    function accept_suggestion() {
+        while (suggestions.lastChild) {
+            suggestions.removeChild(suggestions.lastChild);
+        }
+
+        return false;
+    }
+
+    // Taken from mdbook
+    // The strategy is as follows:
+    // First, assign a value to each word in the document:
+    //  Words that correspond to search terms (stemmer aware): 40
+    //  Normal words: 2
+    //  First word in a sentence: 8
+    // Then use a sliding window with a constant number of words and count the
+    // sum of the values of the words within the window. Then use the window that got the
+    // maximum sum. If there are multiple maximas, then get the last one.
+    // Enclose the terms in <b>.
+    function makeTeaser(body, terms) {
+        var TERM_WEIGHT = 40;
+        var NORMAL_WORD_WEIGHT = 2;
+        var FIRST_WORD_WEIGHT = 8;
+        var TEASER_MAX_WORDS = 30;
+
+        var stemmedTerms = terms.map(function(w) {
+            return elasticlunr.stemmer(w.toLowerCase());
+        });
+        var termFound = false;
+        var index = 0;
+        var weighted = []; // contains elements of ["word", weight, index_in_document]
+
+        // split in sentences, then words
+        var sentences = body.toLowerCase().split(". ");
+        for (var i in sentences) {
+            var words = sentences[i].split(/[\s\n]/);
+            var value = FIRST_WORD_WEIGHT;
+            for (var j in words) {
+                var word = words[j];
+
+                if (word.length > 0) {
+                    for (var k in stemmedTerms) {
+                        if (elasticlunr.stemmer(word).startsWith(stemmedTerms[k])) {
+                            value = TERM_WEIGHT;
+                            termFound = true;
+                        }
+                    }
+                    weighted.push([word, value, index]);
+                    value = NORMAL_WORD_WEIGHT;
+                }
+
+                index += word.length;
+                index += 1; // ' ' or '.' if last word in sentence
+            }
+
+            index += 1; // because we split at a two-char boundary '. '
+        }
+
+        if (weighted.length === 0) {
+            if (body.length !== undefined && body.length > TEASER_MAX_WORDS * 10) {
+                return body.substring(0, TEASER_MAX_WORDS * 10) + "...";
+            } else {
+                return body;
+            }
+        }
+
+        var windowWeights = [];
+        var windowSize = Math.min(weighted.length, TEASER_MAX_WORDS);
+        // We add a window with all the weights first
+        var curSum = 0;
+        for (var i = 0; i < windowSize; i++) {
+            curSum += weighted[i][1];
+        }
+        windowWeights.push(curSum);
+
+        for (var i = 0; i < weighted.length - windowSize; i++) {
+            curSum -= weighted[i][1];
+            curSum += weighted[i + windowSize][1];
+            windowWeights.push(curSum);
+        }
+
+        // If we didn't find the term, just pick the first window
+        var maxSumIndex = 0;
+        if (termFound) {
+            var maxFound = 0;
+            // backwards
+            for (var i = windowWeights.length - 1; i >= 0; i--) {
+                if (windowWeights[i] > maxFound) {
+                    maxFound = windowWeights[i];
+                    maxSumIndex = i;
+                }
+            }
+        }
+
+        var teaser = [];
+        var startIndex = weighted[maxSumIndex][2];
+        for (var i = maxSumIndex; i < maxSumIndex + windowSize; i++) {
+            var word = weighted[i];
+            if (startIndex < word[2]) {
+                // missing text from index to start of `word`
+                teaser.push(body.substring(startIndex, word[2]));
+                startIndex = word[2];
+            }
+
+            // add <em/> around search terms
+            if (word[1] === TERM_WEIGHT) {
+                teaser.push("<b>");
+            }
+
+            startIndex = word[2] + word[0].length;
+            // Check the string is ascii characters or not
+            var re = /^[\x00-\xff]+$/;
+            if (word[1] !== TERM_WEIGHT && word[0].length >= 12 && !re.test(word[0])) {
+                // If the string's length is too long, it maybe a Chinese/Japance/Korean article
+                // if using substring method directly, it may occur error codes on emoji chars
+                var strBefor = body.substring(word[2], startIndex);
+                var strAfter = substringByByte(strBefor, 12);
+                teaser.push(strAfter);
+            } else {
+                teaser.push(body.substring(word[2], startIndex));
+            }
+
+            if (word[1] === TERM_WEIGHT) {
+                teaser.push("</b>");
+            }
+        }
+        teaser.push("…");
+        return teaser.join("");
+    }
+})();
+
+// Get substring by bytes
+// If using JavaScript inline substring method, it will return error codes
+// Source: https://www.52pojie.cn/thread-1059814-1-1.html
+function substringByByte(str, maxLength) {
+    var result = "";
+    var flag = false;
+    var len = 0;
+    var length = 0;
+    var length2 = 0;
+    for (var i = 0; i < str.length; i++) {
+        var code = str.codePointAt(i).toString(16);
+        if (code.length > 4) {
+            i++;
+            if (i + 1 < str.length) {
+                flag = str.codePointAt(i + 1).toString(16) == "200d";
+            }
+        }
+        if (flag) {
+            len += getByteByHex(code);
+            if (i == str.length - 1) {
+                length += len;
+                if (length <= maxLength) {
+                    result += str.substr(length2, i - length2 + 1);
+                } else {
+                    break;
+                }
+            }
+        } else {
+            if (len != 0) {
+                length += len;
+                length += getByteByHex(code);
+                if (length <= maxLength) {
+                    result += str.substr(length2, i - length2 + 1);
+                    length2 = i + 1;
+                } else {
+                    break;
+                }
+                len = 0;
+                continue;
+            }
+            length += getByteByHex(code);
+            if (length <= maxLength) {
+                if (code.length <= 4) {
+                    result += str[i];
+                } else {
+                    result += str[i - 1] + str[i];
+                }
+                length2 = i + 1;
+            } else {
+                break;
+            }
+        }
+    }
+    return result;
+}
+
+// Get the string bytes from binary
+function getByteByBinary(binaryCode) {
+    // Binary system, starts with `0b` in ES6
+    // Octal number system, starts with `0` in ES5 and starts with `0o` in ES6
+    // Hexadecimal, starts with `0x` in both ES5 and ES6
+    var byteLengthDatas = [0, 1, 2, 3, 4];
+    var len = byteLengthDatas[Math.ceil(binaryCode.length / 8)];
+    return len;
+}
+
+// Get the string bytes from hexadecimal
+function getByteByHex(hexCode) {
+    return getByteByBinary(parseInt(hexCode, 16).toString(2));
+}

templates/section.html

@@ -4,13 +4,15 @@
 
 {% block content %}
 <div class="container" role="document">
-  <div class="main">
+  <div class="content">
-    {% include "components/left-sidebar-singleton.html" %}
+    <div class="main">
-    {% include "components/right-sidebar.html" %}
+      {% include "components/left-sidebar-singleton.html" %}
-    <article>
+      {% include "components/right-sidebar.html" %}
-      <h1 class="text-center">{{ section.title }}</h1>
+      <article>
-      <div class="text-center">{{ section.content | safe }}</div>
+        <h1 class="text-center">{{ section.title }}</h1>
-    </article>
+        <div class="text-center">{{ section.content | safe }}</div>
+      </article>
+    </div>
   </div>
 </div>
 {% endblock content %}