Add tabs to the documentation

.gitignore

@@ -4,3 +4,4 @@ build
 build-pico-sdk-docs
 documentation/html
 documentation/asciidoc/pico-sdk
+.venv

Gemfile

@@ -21,6 +21,8 @@ gem "minima", "~> 2.0"
 group :jekyll_plugins do
   gem "jekyll-feed", "~> 0.17"
   gem 'jekyll-asciidoc'
+  gem 'asciidoctor'
+  gem 'asciidoctor-tabs', ">= 1.0.0.beta.6"
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
@@ -37,4 +39,4 @@ gem "nokogiri", "~> 1.16"
 
 # So we can add custom element templates
 gem 'slim', '~> 5.2.1'
-gem 'thread_safe', '~> 0.3.5'
+gem 'thread_safe', '~> 0.3.5'

Gemfile.lock

@@ -4,6 +4,8 @@ GEM
     addressable (2.8.6)
       public_suffix (>= 2.0.2, < 6.0)
     asciidoctor (2.0.20)
+    asciidoctor-tabs (1.0.0.beta.6)
+      asciidoctor (>= 2.0.0, < 3.0.0)
     colorator (1.1.0)
     concurrent-ruby (1.2.3)
     em-websocket (0.5.3)
@@ -94,6 +96,8 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  asciidoctor
+  asciidoctor-tabs (>= 1.0.0.beta.6)
   jekyll (~> 4.3.3)
   jekyll-asciidoc
   jekyll-feed (~> 0.17)

_config.yml

@@ -25,6 +25,7 @@ githubbranch_edit: develop
 # Build settings
 theme: minima
 plugins:
+  - asciidoctor-tabs
   - jekyll-asciidoc
   - jekyll-feed
 

documentation/asciidoc/computers/remote-access/ssh.adoc

@@ -7,33 +7,35 @@ You can access the terminal of a Raspberry Pi remotely from another computer on
 
 By default, Raspberry Pi OS disables the SSH server. Enable SSH in one of the following ways:
 
-==== On the desktop
-
+[tabs]
+======
+On the desktop::
++
 . From the *Preferences* menu, launch *Raspberry Pi Configuration*.
 . Navigate to the *Interfaces* tab.
 . Select *Enabled* next to *SSH*.
 . Click *OK*.
 
-==== While flashing a fresh OS image
-
+While flashing a fresh OS image::
++
 To configure SSH on a completely new installation of Raspberry Pi OS:
-
++
 . Follow the instructions in the xref:../computers/getting-started.adoc#raspberry-pi-imager[Install with Imager] guide.
 . During the **OS Customisation** step, navigate to the **Services** tab.
 . Tick the checkbox to **Enable SSH**.
 . Select **password authentication** to log in using the same username and password you use while physically using your Raspberry Pi. Select **Allow public-key authentication only** to xref:remote-access.adoc#configure-ssh-without-a-password[configure an SSH key] for passwordless login.
 
-==== From the terminal
-
+From the terminal::
++
 . Enter `sudo raspi-config` in a terminal window.
 . Select `Interfacing Options`.
 . Navigate to and select `SSH`.
 . Choose `Yes`.
 . Select `Ok`.
 . Choose `Finish`.
 
-==== Manually
-
+Manually::
++
 . Create an empty file named `ssh` in the boot partition:
 +
 [source,console]
@@ -46,6 +48,7 @@ $ sudo touch /boot/firmware/ssh
 ----
 $ sudo reboot
 ----
+======
 
 === Connect to an SSH server
 

jekyll-assets/_includes/head.html

@@ -18,6 +18,7 @@
 <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@docsearch/css@3"/>
 <link rel="stylesheet" href="{{ site.baseurl }}/css/style.css?ver={{ site.time | date: '%s' }}">
 <link rel="stylesheet" href="{{ site.baseurl }}/css/tabs.css?ver={{ site.time | date: '%s' }}">
+<link rel="stylesheet" href="{{ site.baseurl }}/css/asciidoctor-tabs.css?ver={{ site.time | date: '%s' }}">
 <link rel="stylesheet" href="{{ site.baseurl }}/css/syntax-highlighting.css?ver={{ site.time | date: '%s' }}">
 <script async src="https://www.googletagmanager.com/gtag/js?id=UA-180927933-8"></script>
 <script>

jekyll-assets/_includes/scripts.html

@@ -1,6 +1,9 @@
 <!-- Script for the TOC toggle -->
 <script src="{{ site.baseurl }}/scripts/nav.js?ver={{ site.time | date: '%s' }}" type="text/javascript"></script>
 
+<!-- Asciidoctor tabs -->
+<script src="{{ site.baseurl }}/scripts/asciidoctor-tabs.js?ver={{ site.time | date: '%s' }}" type="text/javascript"></script>
+
 <!-- TOCify scripts -->
 <script src="{{ site.baseurl }}/scripts/jquery-1.12.4.min.js"></script>
 <script src="{{ site.baseurl }}/scripts/jquery-ui-1.13.0.custom.min.js"></script>

jekyll-assets/css/asciidoctor-tabs.css

@@ -0,0 +1,116 @@
+
+/*! Asciidoctor Tabs | Copyright (c) 2018-present Dan Allen | MIT License */
+.tabs {
+  margin-bottom: 1.25em;
+}
+
+.tablist > ul {
+  display: flex;
+  flex-wrap: nowrap;
+  overflow-x: scroll;
+  overflow-y: hidden;
+  list-style: none;
+  margin: 0;
+  padding: 0;
+}
+
+.tablist > ul li {
+  align-items: center;
+  background-color: #eee;
+  cursor: pointer;
+  display: flex;
+  font-weight: bold;
+  line-height: 1.5;
+  padding: 0.25em 1em;
+  position: relative;
+}
+
+.tablist > ul li p {
+  margin-bottom: 0px !important;
+}
+
+.tablist > ul li:focus-visible {
+  outline: none;
+}
+
+.tablist.ulist,
+.tablist.ulist > ul li {
+  margin: 0;
+}
+
+.tablist.ulist > ul li + li {
+  margin-left: 0.25em;
+}
+
+.tabs .tablist li::after {
+  content: "";
+  display: block;
+  height: 1px;
+  position: absolute;
+  bottom: -1px;
+  left: 0;
+  right: 0;
+}
+
+.tabs.is-loading .tablist li:not(:first-child),
+.tabs:not(.is-loading) .tablist li:not(.is-selected) {
+  background-color: initial;
+  border-left: 1px solid #eee;
+  border-right: 1px solid #eee;
+  border-top: 1px solid #eee;
+}
+
+.tabs.is-loading .tablist li:first-child::after,
+.tabs:not(.is-loading) .tablist li.is-selected::after {
+  background-color: #eee;
+  border-top: 2px solid var(--red);
+}
+
+/*
+.tabs:not(.is-loading) .tablist li,
+.tabs:not(.is-loading) .tablist li::after {
+  transition: background-color 200ms ease-in-out;
+}
+*/
+
+.tablist > ul p {
+  line-height: inherit;
+  margin: 0;
+}
+
+.tabpanel {
+  background-color: #eee;
+  padding: 1.25em;
+}
+
+.tablist > ul li {
+  border-bottom: 0;
+}
+
+.tabs.is-loading .tabpanel + .tabpanel,
+.tabs:not(.is-loading) .tabpanel.is-hidden {
+  display: none;
+}
+
+.tabpanel > :first-child {
+  margin-top: 0;
+}
+
+/* #content is a signature of the Asciidoctor standalone HTML output */
+#content .tabpanel > :last-child,
+#content .tabpanel > :last-child > :last-child,
+#content .tabpanel > :last-child > :last-child > li:last-child > :last-child {
+  margin-bottom: 0;
+}
+
+.tablecontainer {
+  overflow-x: auto;
+}
+
+#content .tablecontainer {
+  margin-bottom: 1.25em;
+}
+
+#content .tablecontainer > table.tableblock {
+  margin-bottom: 0;
+}

jekyll-assets/css/tabs.css

@@ -79,4 +79,4 @@ p#release + #container {
     display: block;
     width: 100%;
   }
-}
+}

jekyll-assets/scripts/asciidoctor-tabs.js

@@ -0,0 +1,127 @@
+;(function () { /*! Asciidoctor Tabs | Copyright (c) 2018-present Dan Allen | MIT License */
+  'use strict'
+
+  var config = (document.currentScript || {}).dataset || {}
+  var forEach = Array.prototype.forEach
+
+  init(document.querySelectorAll('.tabs'))
+
+  function init (tabsBlocks) {
+    if (!tabsBlocks.length) return
+    forEach.call(tabsBlocks, function (tabs) {
+      var syncIds = tabs.classList.contains('is-sync') ? {} : undefined
+      var tablist = tabs.querySelector('.tablist ul')
+      tablist.setAttribute('role', 'tablist')
+      var start
+      forEach.call(tablist.querySelectorAll('li'), function (tab, idx) {
+        tab.tabIndex = -1
+        tab.setAttribute('role', tab.classList.add('tab') || 'tab')
+        var id, anchor, syncId
+        if (!(id = tab.id) && (anchor = tab.querySelector('a[id]'))) {
+          id = tab.id = anchor.parentNode.removeChild(anchor).id
+        }
+        var panel = id && tabs.querySelector('.tabpanel[aria-labelledby~="' + id + '"]')
+        if (!panel) return idx ? undefined : toggleSelected(tab, true) // invalid state
+        syncIds && (((syncId = tab.textContent.trim()) in syncIds) ? (syncId = undefined) : true) &&
+          (syncIds[(tab.dataset.syncId = syncId)] = tab)
+        idx || (syncIds && (start = { tab: tab, panel: panel })) ? toggleHidden(panel, true) : toggleSelected(tab, true)
+        tab.setAttribute('aria-controls', panel.id)
+        panel.setAttribute('role', 'tabpanel')
+        var onClick = syncId === undefined ? activateTab : activateTabSync
+        tab.addEventListener('click', onClick.bind({ tabs: tabs, tab: tab, panel: panel }))
+      })
+      if (!tabs.closest('.tabpanel')) {
+        forEach.call(tabs.querySelectorAll('.tabpanel table.tableblock'), function (table) {
+          var container = Object.assign(document.createElement('div'), { className: 'tablecontainer' })
+          table.parentNode.insertBefore(container, table).appendChild(table)
+        })
+      }
+      if (start) {
+        var syncGroupId
+        for (var i = 0, lst = tabs.classList, len = lst.length, className; i !== len; i++) {
+          if (!(className = lst.item(i)).startsWith('data-sync-group-id=')) continue
+          tabs.dataset.syncGroupId = syncGroupId = lst.remove(className) || className.slice(19).replace(/\u00a0/g, ' ')
+          break
+        }
+        if (syncGroupId === undefined) tabs.dataset.syncGroupId = syncGroupId = Object.keys(syncIds).sort().join('|')
+        var preferredSyncId = 'syncStorageKey' in config &&
+          window[(config.syncStorageScope || 'local') + 'Storage'].getItem(config.syncStorageKey + '-' + syncGroupId)
+        var tab = preferredSyncId && syncIds[preferredSyncId]
+        tab && Object.assign(start, { tab: tab, panel: document.getElementById(tab.getAttribute('aria-controls')) })
+        toggleSelected(start.tab, true) || toggleHidden(start.panel, false)
+      }
+    })
+    onHashChange()
+    toggleClassOnEach(tabsBlocks, 'is-loading', 'remove')
+    window.setTimeout(toggleClassOnEach.bind(null, tabsBlocks, 'is-loaded', 'add'), 0)
+    window.addEventListener('hashchange', onHashChange)
+  }
+
+  function activateTab (e) {
+    var tab = this.tab
+    var tabs = this.tabs || (this.tabs = tab.closest('.tabs'))
+    var panel = this.panel || (this.panel = document.getElementById(tab.getAttribute('aria-controls')))
+    querySelectorWithSiblings(tabs, '.tablist .tab', 'tab').forEach(function (el) {
+      toggleSelected(el, el === tab)
+    })
+    querySelectorWithSiblings(tabs, '.tabpanel', 'tabpanel').forEach(function (el) {
+      toggleHidden(el, el !== panel)
+    })
+    if (!this.isSync && 'syncStorageKey' in config && 'syncGroupId' in tabs.dataset) {
+      var storageKey = config.syncStorageKey + '-' + tabs.dataset.syncGroupId
+      window[(config.syncStorageScope || 'local') + 'Storage'].setItem(storageKey, tab.dataset.syncId)
+    }
+    if (!e) return
+    var loc = window.location
+    var hashIdx = loc.hash ? loc.href.indexOf('#') : -1
+    if (~hashIdx) window.history.replaceState(null, '', loc.href.slice(0, hashIdx))
+    e.preventDefault()
+  }
+
+  function activateTabSync (e) {
+    activateTab.call(this, e)
+    var thisTabs = this.tabs
+    var thisTab = this.tab
+    var initialY = thisTabs.getBoundingClientRect().y
+    forEach.call(document.querySelectorAll('.tabs'), function (tabs) {
+      if (tabs === thisTabs || tabs.dataset.syncGroupId !== thisTabs.dataset.syncGroupId) return
+      querySelectorWithSiblings(tabs, '.tablist .tab', 'tab').forEach(function (tab) {
+        if (tab.dataset.syncId === thisTab.dataset.syncId) activateTab.call({ tabs: tabs, tab: tab, isSync: true })
+      })
+    })
+    var shiftedBy = thisTabs.getBoundingClientRect().y - initialY
+    if (shiftedBy && (shiftedBy = Math.round(shiftedBy))) window.scrollBy({ top: shiftedBy, behavior: 'instant' })
+  }
+
+  function querySelectorWithSiblings (scope, selector, siblingClass) {
+    var el = scope.querySelector(selector)
+    if (!el) return []
+    var result = [el]
+    while ((el = el.nextElementSibling) && el.classList.contains(siblingClass)) result.push(el)
+    return result
+  }
+
+  function toggleClassOnEach (elements, className, method) {
+    forEach.call(elements, function (el) {
+      el.classList[method](className)
+    })
+  }
+
+  function toggleHidden (el, state) {
+    el.classList[(el.hidden = state) ? 'add' : 'remove']('is-hidden')
+  }
+
+  function toggleSelected (el, state) {
+    el.setAttribute('aria-selected', '' + state)
+    el.classList[state ? 'add' : 'remove']('is-selected')
+    el.tabIndex = state ? 0 : -1
+  }
+
+  function onHashChange () {
+    var id = window.location.hash.slice(1)
+    if (!id) return
+    var tab = document.getElementById(~id.indexOf('%') ? decodeURIComponent(id) : id)
+    if (!(tab && tab.classList.contains('tab'))) return
+    'syncId' in tab.dataset ? activateTabSync.call({ tab: tab }) : activateTab.call({ tab: tab })
+  }
+})()