Add Document Search

microsite/docs/docs/intro.md

@@ -23,6 +23,8 @@ This plugin is based on and utilizes other awesome sbt plugins to make it possib
 
 The plugin provides basic free styles, css, and image resources by default. Everything is based on the [Bootstrap](https://getbootstrap.com/) framework. If you want to personalize the color palette, styles, and images for your project, you can easily do so by viewing the steps in the [documentation]({% link docs/getting-started.md %}).
 
+Document search is provided by the [Lunr.js](https://lunrjs.com/) project for client-side search functionality.
+
 In order to create microsites, this plugin directly uses the following plugins and libraries:
 
 * [sbt-mdoc](https://github.com/scalameta/mdoc)

microsite/docs/docs/settings.md

@@ -290,6 +290,8 @@ Each file (the map key) can be related to a specific configuration through the `
 micrositePluginsDirectory := (resourceDirectory in Compile).value / "site" / "plugins"
 ```
 
+- `micrositeSearchEnabled`: Whether or not the search bar functionality is enabled for your microsite. Enabled by default. To disable, set to `false`.
+
 - `micrositeTheme`: You can choose two different themes to generate your microsite. By default it will display the `light` theme but you have the option of choosing the classic `pattern` theme.
 
 ```scala

src/main/resources/_sass/light-style/_doc-search.scss

@@ -0,0 +1,62 @@
+div[id$='search-dropdown'] {
+  position: relative;
+
+  .dropdown {
+    display: block;
+    outline: 0;
+    width: 100%;
+  }
+
+  label {
+    padding-right: 0.3em;
+
+    i {
+      padding-right: 0.2em;
+    }
+  }
+
+  /* Documentation Dropdown Content (Hidden by Default) */
+  .dropdown-content {
+    position: absolute;
+    min-width: 100px;
+    overflow: hidden auto;
+    box-shadow: 0 8px 16px 0 rgba(0, 0, 0, 0.2);
+    z-index: 1;
+    background: $white-color;
+    margin: 0;
+    padding: 0;
+    opacity: 0.5;
+    transform: rotate3d(1, 0, 0, 90deg);
+    transition: transform ease 250ms, opacity ease 100ms;
+    transform-origin: top;
+
+    .dropdown-item {
+      width: 100%;
+
+      .dropdown-item-link {
+        padding: 12px 9px;
+        text-decoration: none;
+        display: block;
+        border-radius: 0;
+        color: #333;
+
+        &:hover span {
+           border-bottom: 2px solid;
+        }
+
+        &:focus span {
+          border-bottom: 2px solid;
+        }
+
+      }
+    }
+  }
+
+  /* Show the documentation dropdown menu (use JS to add this class
+    to the .dropdown-content container when the user clicks on
+    the dropdown button) */
+  .show {
+    transform: rotate3d(1, 0, 0, 0);
+    opacity: 1;
+  }
+}

src/main/resources/_sass/light-style/_light-docs.scss

@@ -189,7 +189,7 @@
         height: $top-bar-size;
       }
 
-      a {
+      a:not(.dropdown-item-link) {
         color: $brand-primary;
         padding: 0 $base-point-grid * 2;
         display: block;
@@ -209,7 +209,7 @@
           list-style: none;
           display: inline-block;
 
-          span {
+          span:not(.dropdown-item-link-text) {
             display: inline-flex;
             flex-direction: row-reverse;
             font-size: 14px;

src/main/resources/css/light-style.scss

@@ -12,6 +12,7 @@
 @import "light-style/button";
 @import "light-style/masthead";
 @import "light-style/main";
+@import "light-style/doc-search";
 @import "light-style/doc-versions";
 @import "light-style/footer";
 @import "light-style/light-docs";

src/main/resources/js/search.js

@@ -0,0 +1,192 @@
+---
+---
+// When the user clicks on the search box, we want to toggle the search dropdown
+function displayToggleSearch(e) {
+  e.preventDefault();
+  e.stopPropagation();
+
+  closeDropdownSearch(e);
+
+  if (idx === null) {
+    console.log("Building search index...");
+    prepareIdxAndDocMap();
+    console.log("Search index built.");
+  }
+  const dropdown = document.querySelector("#search-dropdown-content");
+  if (dropdown) {
+    if (!dropdown.classList.contains("show")) {
+      dropdown.classList.add("show");
+    }
+    document.addEventListener("click", closeDropdownSearch);
+    document.addEventListener("keydown", searchOnKeyDown);
+    document.addEventListener("keyup", searchOnKeyUp);
+  }
+}
+
+//We want to prepare the index only after clicking the search bar
+var idx = null
+const docMap = new Map()
+
+function prepareIdxAndDocMap() {
+  const docs = [{% if site.search_enabled %} {% for page in site.pages %} {% if page.title %}
+    {
+      "title": "{{ page.title }}",
+      "url": "{{ site.baseurl }}{{ page.url }}",
+      "content": {{ page.content | markdownify | strip_html | normalize_whitespace | strip | jsonify }}
+    } {% unless forloop.last %}, {% endunless %} {% endif %} {% endfor %} {% endif %}
+  ];
+
+  idx = lunr(function () {
+    this.ref("title");
+    this.field("content");
+
+    docs.forEach(function (doc) {
+      this.add(doc);
+    }, this);
+  });
+
+  docs.forEach(function (doc) {
+    docMap.set(doc.title, doc.url);
+  });
+}
+
+// The onkeypress handler for search functionality
+function searchOnKeyDown(e) {
+  const keyCode = e.keyCode;
+  const parent = e.target.parentElement;
+  const isSearchBar = e.target.id === "search-bar";
+  const isSearchResult = parent ? parent.id.startsWith("result-") : false;
+  const isSearchBarOrResult = isSearchBar || isSearchResult;
+
+  if (keyCode === 40 && isSearchBarOrResult) {
+    // On 'down', try to navigate down the search results
+    e.preventDefault();
+    e.stopPropagation();
+    selectDown(e);
+  } else if (keyCode === 38 && isSearchBarOrResult) {
+    // On 'up', try to navigate up the search results
+    e.preventDefault();
+    e.stopPropagation();
+    selectUp(e);
+  } else if (keyCode === 27 && isSearchBarOrResult) {
+    // On 'ESC', close the search dropdown
+    e.preventDefault();
+    e.stopPropagation();
+    closeDropdownSearch(e);
+  }
+}
+
+// Search is only done on key-up so that the search terms are properly propagated
+function searchOnKeyUp(e) {
+  // Filter out up, down, esc keys
+  const keyCode = e.keyCode;
+  const cannotBe = [40, 38, 27];
+  const isSearchBar = e.target.id === "search-bar";
+  const keyIsNotWrong = !cannotBe.includes(keyCode);
+  if (isSearchBar && keyIsNotWrong) {
+    // Try to run a search
+    runSearch(e);
+  }
+}
+
+// Move the cursor up the search list
+function selectUp(e) {
+  if (e.target.parentElement.id.startsWith("result-")) {
+    const index = parseInt(e.target.parentElement.id.substring(7));
+    if (!isNaN(index) && (index > 0)) {
+      const nextIndexStr = "result-" + (index - 1);
+      const querySel = "li[id$='" + nextIndexStr + "'";
+      const nextResult = document.querySelector(querySel);
+      if (nextResult) {
+        nextResult.firstChild.focus();
+      }
+    }
+  }
+}
+
+// Move the cursor down the search list
+function selectDown(e) {
+  if (e.target.id === "search-bar") {
+    const firstResult = document.querySelector("li[id$='result-0']");
+    if (firstResult) {
+      firstResult.firstChild.focus();
+    }
+  } else if (e.target.parentElement.id.startsWith("result-")) {
+    const index = parseInt(e.target.parentElement.id.substring(7));
+    if (!isNaN(index)) {
+      const nextIndexStr = "result-" + (index + 1);
+      const querySel = "li[id$='" + nextIndexStr + "'";
+      const nextResult = document.querySelector(querySel);
+      if (nextResult) {
+        nextResult.firstChild.focus();
+      }
+    }
+  }
+}
+
+// Search for whatever the user has typed so far
+function runSearch(e) {
+  if (e.target.value === "") {
+    // On empty string, remove all search results
+    // Otherwise this may show all results as everything is a "match"
+    applySearchResults([]);
+  } else {
+    const tokens = e.target.value.split(" ");
+    const moddedTokens = tokens.map(function (token) {
+      // "*" + token + "*"
+      return token;
+    })
+    const searchTerm = moddedTokens.join(" ");
+    const searchResults = idx.search(searchTerm);
+    const mapResults = searchResults.map(function (result) {
+      const resultUrl = docMap.get(result.ref);
+      return { name: result.ref, url: resultUrl };
+    })
+
+    applySearchResults(mapResults);
+  }
+
+}
+
+// After a search, modify the search dropdown to contain the search results
+function applySearchResults(results) {
+  const dropdown = document.querySelector("div[id$='search-dropdown'] > .dropdown-content.show");
+  if (dropdown) {
+    //Remove each child
+    while (dropdown.firstChild) {
+      dropdown.removeChild(dropdown.firstChild);
+    }
+
+    //Add each result as an element in the list
+    results.forEach(function (result, i) {
+      const elem = document.createElement("li");
+      elem.setAttribute("class", "dropdown-item");
+      elem.setAttribute("id", "result-" + i);
+
+      const elemLink = document.createElement("a");
+      elemLink.setAttribute("title", result.name);
+      elemLink.setAttribute("href", result.url);
+      elemLink.setAttribute("class", "dropdown-item-link");
+
+      const elemLinkText = document.createElement("span");
+      elemLinkText.setAttribute("class", "dropdown-item-link-text");
+      elemLinkText.innerHTML = result.name;
+
+      elemLink.appendChild(elemLinkText);
+      elem.appendChild(elemLink);
+      dropdown.appendChild(elem);
+    });
+  }
+}
+
+// Close the dropdown if the user clicks (only) outside of it
+function closeDropdownSearch(e) {
+  // Check if where we're clicking is the search dropdown
+  if (e.target.id !== "search-bar") {
+    const dropdown = document.querySelector("div[id$='search-dropdown'] > .dropdown-content.show");
+    if (dropdown) {
+      dropdown.classList.remove("show");
+      document.documentElement.removeEventListener("click", closeDropdownSearch);
+    }
+  }
+}

src/main/resources/js/version-selector.js

@@ -1,28 +1,28 @@
 /* When the user clicks on the navigation Documentation button,
  * toggle between hiding and showing the dropdown content.
  */
-function displayToggle(e) {
+function displayToggleVersion(e) {
   e.preventDefault();
   e.stopPropagation();
   // Calling close func. in case we're clicking another dropdown with one opened
-  closeDropdown(e);
+  closeDropdownVersion(e);
   const parent = e.target.closest("div[id$='version-dropdown']");
   if (parent) {
-    const dropdown = parent.querySelector(".dropdown-content");
+    const dropdown = parent.querySelector("#version-dropdown-content");
     if (dropdown) {
       dropdown.classList.toggle("show");
       if (dropdown.classList.contains("show")) {
-        document.documentElement.addEventListener("click", closeDropdown);
+        document.documentElement.addEventListener("click", closeDropdownVersion);
       }
       else {
-        document.documentElement.removeEventListener("click", closeDropdown);
+        document.documentElement.removeEventListener("click", closeDropdownVersion);
       }
     }
   }
 }
 
 // Close the dropdown if the user clicks (only) outside of it
-function closeDropdown(e) {
+function closeDropdownVersion(e) {
   const dropdown = document.querySelector("div[id$='version-dropdown'] > .dropdown-content.show");
   if (dropdown) {
     const currentTarget = e.currentTarget || {};
@@ -31,6 +31,6 @@ function closeDropdown(e) {
     if (currentTargetParent !== dropdownParent) {
       dropdown.classList.remove("show");
     }
-    document.documentElement.removeEventListener("click", closeDropdown);
+    document.documentElement.removeEventListener("click", closeDropdownVersion);
   }
 }

src/main/resources/lunr/LICENSE

@@ -0,0 +1,20 @@
+
+Copyright (C) 2013 by Oliver Nightingale
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.