feat(search): experimental telescope layout (closes #718) (#722)

* feat(search): telescope-style search

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

* chore(search): cleanup some basis and borders

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

* fix(search): make sure to set overflow-y

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

* feat(search): shows preview on desktop only search

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

* perf: add options to control layout through config

cache memoize results to avoid fetching

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

* chore: use the default configuration

* fix: correct minor type for search

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

* fix: use datasets to query for preview

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

* chore: layout changes

show preview on normal layout, and only show previous layout in list page.

* fix(type): annotate search with types

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

* chore: apply jacky's suggestion

Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>

* chore: using map API and scss

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

* fix: styling on search container view on phones

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

* Update quartz.layout.ts

Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>

---------

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>
Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>

quartz/components/Search.tsx

@@ -4,8 +4,18 @@ import style from "./styles/search.scss"
 import script from "./scripts/search.inline"
 import { classNames } from "../util/lang"
 
-export default (() => {
+export interface SearchOptions {
+  enablePreview: boolean
+}
+
+const defaultOptions: SearchOptions = {
+  enablePreview: true,
+}
+
+export default ((userOpts?: Partial<SearchOptions>) => {
   function Search({ displayClass }: QuartzComponentProps) {
+    const opts = { ...defaultOptions, ...userOpts }
+
     return (
       <div class={classNames(displayClass, "search")}>
         <div id="search-icon">
@@ -36,7 +46,7 @@ export default (() => {
               aria-label="Search for something"
               placeholder="Search for something"
             />
-            <div id="results-container"></div>
+            <div id="search-layout" data-preview={opts.enablePreview}></div>
           </div>
         </div>
       </div>

quartz/components/scripts/search.inline.ts

@@ -1,7 +1,7 @@
 import FlexSearch from "flexsearch"
 import { ContentDetails } from "../../plugins/emitters/contentIndex"
 import { registerEscapeHandler, removeAllChildren } from "./util"
-import { FullSlug, resolveRelative } from "../../util/path"
+import { FullSlug, normalizeRelativeURLs, resolveRelative } from "../../util/path"
 
 interface Item {
   id: number
@@ -71,20 +71,44 @@ function highlight(searchTerm: string, text: string, trim?: boolean) {
   }`
 }
 
+const p = new DOMParser()
 const encoder = (str: string) => str.toLowerCase().split(/([^a-z]|[^\x00-\x7F])/)
 let prevShortcutHandler: ((e: HTMLElementEventMap["keydown"]) => void) | undefined = undefined
-document.addEventListener("nav", async (e: unknown) => {
+
-  const currentSlug = (e as CustomEventMap["nav"]).detail.url
+const fetchContentCache: Map<FullSlug, Element[]> = new Map()
+
+document.addEventListener("nav", async (e: CustomEventMap["nav"]) => {
+  const currentSlug = e.detail.url
 
   const data = await fetchData
   const container = document.getElementById("search-container")
   const sidebar = container?.closest(".sidebar") as HTMLElement
   const searchIcon = document.getElementById("search-icon")
   const searchBar = document.getElementById("search-bar") as HTMLInputElement | null
-  const results = document.getElementById("results-container")
+  const searchLayout = document.getElementById("search-layout")
   const resultCards = document.getElementsByClassName("result-card")
   const idDataMap = Object.keys(data) as FullSlug[]
 
+  const appendLayout = (el: HTMLElement) => {
+    if (searchLayout?.querySelector(`#${el.id}`) === null) {
+      searchLayout?.appendChild(el)
+    }
+  }
+
+  const enablePreview = searchLayout?.dataset?.preview === "true"
+  let preview: HTMLDivElement | undefined = undefined
+  const results = document.createElement("div")
+  results.id = "results-container"
+  results.style.flexBasis = enablePreview ? "30%" : "100%"
+  appendLayout(results)
+
+  if (enablePreview) {
+    preview = document.createElement("div")
+    preview.id = "preview-container"
+    preview.style.flexBasis = "70%"
+    appendLayout(preview)
+  }
+
   function hideSearch() {
     container?.classList.remove("active")
     if (searchBar) {
@@ -96,6 +120,9 @@ document.addEventListener("nav", async (e: unknown) => {
     if (results) {
       removeAllChildren(results)
     }
+    if (preview) {
+      removeAllChildren(preview)
+    }
 
     searchType = "basic" // reset search type after closing
   }
@@ -109,7 +136,7 @@ document.addEventListener("nav", async (e: unknown) => {
     searchBar?.focus()
   }
 
-  function shortcutHandler(e: HTMLElementEventMap["keydown"]) {
+  async function shortcutHandler(e: HTMLElementEventMap["keydown"]) {
     if (e.key === "k" && (e.ctrlKey || e.metaKey) && !e.shiftKey) {
       e.preventDefault()
       const searchBarOpen = container?.classList.contains("active")
@@ -139,6 +166,9 @@ document.addEventListener("nav", async (e: unknown) => {
       if (results?.contains(document.activeElement)) {
         // If an element in results-container already has focus, focus previous one
         const prevResult = document.activeElement?.previousElementSibling as HTMLInputElement | null
+        if (enablePreview && prevResult?.id) {
+          await displayPreview(prevResult?.id as FullSlug)
+        }
         prevResult?.focus()
       }
     } else if (e.key === "ArrowDown" || e.key === "Tab") {
@@ -146,10 +176,16 @@ document.addEventListener("nav", async (e: unknown) => {
       // When first pressing ArrowDown, results wont contain the active element, so focus first element
       if (!results?.contains(document.activeElement)) {
         const firstResult = resultCards[0] as HTMLInputElement | null
+        if (enablePreview && firstResult?.id) {
+          await displayPreview(firstResult?.id as FullSlug)
+        }
         firstResult?.focus()
       } else {
         // If an element in results-container already has focus, focus next one
         const nextResult = document.activeElement?.nextElementSibling as HTMLInputElement | null
+        if (enablePreview && nextResult?.id) {
+          await displayPreview(nextResult?.id as FullSlug)
+        }
         nextResult?.focus()
       }
     }
@@ -220,13 +256,17 @@ document.addEventListener("nav", async (e: unknown) => {
     }
   }
 
+  function resolveUrl(slug: FullSlug): URL {
+    return new URL(resolveRelative(currentSlug, slug), location.toString())
+  }
+
   const resultToHTML = ({ slug, title, content, tags }: Item) => {
     const htmlTags = tags.length > 0 ? `<ul>${tags.join("")}</ul>` : ``
     const itemTile = document.createElement("a")
     itemTile.classList.add("result-card")
     itemTile.id = slug
-    itemTile.href = new URL(resolveRelative(currentSlug, slug), location.toString()).toString()
+    itemTile.href = resolveUrl(slug).toString()
-    itemTile.innerHTML = `<h3>${title}</h3>${htmlTags}<p>${content}</p>`
+    itemTile.innerHTML = `<h3>${title}</h3>${htmlTags}${enablePreview && window.innerWidth > 600 ? "" : `<p>${content}</p>`}`
     itemTile.addEventListener("click", (event) => {
       if (event.altKey || event.ctrlKey || event.metaKey || event.shiftKey) return
       hideSearch()
@@ -248,10 +288,47 @@ document.addEventListener("nav", async (e: unknown) => {
     }
   }
 
+  async function fetchContent(slug: FullSlug): Promise<Element[]> {
+    if (fetchContentCache.has(slug)) {
+      return fetchContentCache.get(slug) as Element[]
+    }
+
+    const targetUrl = resolveUrl(slug).toString()
+    const contents = await fetch(targetUrl)
+      .then((res) => res.text())
+      .then((contents) => {
+        if (contents === undefined) {
+          throw new Error(`Could not fetch ${targetUrl}`)
+        }
+        const html = p.parseFromString(contents ?? "", "text/html")
+        normalizeRelativeURLs(html, targetUrl)
+        return [...html.getElementsByClassName("popover-hint")]
+      })
+
+    fetchContentCache.set(slug, contents)
+    return contents
+  }
+
+  async function displayPreview(slug: FullSlug) {
+    if (!searchLayout || !enablePreview) return
+
+    removeAllChildren(preview as HTMLElement)
+    const contentDetails = await fetchContent(slug)
+
+    const previewInner = document.createElement("div")
+    previewInner.classList.add("preview-inner")
+    preview?.appendChild(previewInner)
+    contentDetails?.forEach((elt) => previewInner.appendChild(elt))
+  }
+
   async function onType(e: HTMLElementEventMap["input"]) {
     let term = (e.target as HTMLInputElement).value
     let searchResults: FlexSearch.SimpleDocumentSearchResultSetUnit[]
 
+    if (searchLayout) {
+      searchLayout.style.opacity = "1"
+    }
+
     if (term.toLowerCase().startsWith("#")) {
       searchType = "tags"
     } else {

quartz/components/styles/search.scss

@@ -55,7 +55,7 @@
 
     & > #search-space {
       width: 50%;
-      margin-top: 15vh;
+      margin-top: 12vh;
       margin-left: auto;
       margin-right: auto;
 
@@ -86,13 +86,61 @@
         }
       }
 
+      & > #search-layout {
+        display: flex;
+        flex-direction: row;
+        justify-content: space-between;
+        opacity: 0;
+
+        & > * {
+          height: calc(75vh - 20em);
+          background: none;
+          border-radius: 5px;
+          border: 1px solid var(--lightgray); // Border to define the box
+        }
+
+        @media all and (max-width: $mobileBreakpoint) {
+          display: block;
+          & > *:not(#results-container) {
+            display: none !important;
+          }
+
           & > #results-container {
+            width: 100%;
+            height: auto;
+          }
+        }
+
+        & > #preview-container {
+          display: block;
+          box-sizing: border-box;
+          overflow: hidden;
+
+          & .preview-inner {
+            padding: 1em;
+            height: 100%;
+            box-sizing: border-box;
+            overflow-y: auto;
+            font-family: inherit;
+            font-size: 1.1em;
+            color: var(--dark);
+            line-height: 1.5em;
+            font-weight: 400;
+            background: var(--light);
+            border-radius: 5px;
+            box-shadow:
+              0 14px 50px rgba(27, 33, 48, 0.12),
+              0 10px 30px rgba(27, 33, 48, 0.16);
+          }
+        }
+
+        & > #results-container {
+          overflow-y: auto;
+
           & .result-card {
             padding: 1em;
             cursor: pointer;
             transition: background 0.2s ease;
-          border: 1px solid var(--lightgray);
-          border-bottom: none;
             width: 100%;
             display: block;
             box-sizing: border-box;
@@ -118,17 +166,6 @@
               background: var(--lightgray);
             }
 
-          &:first-of-type {
-            border-top-left-radius: 5px;
-            border-top-right-radius: 5px;
-          }
-
-          &:last-of-type {
-            border-bottom-left-radius: 5px;
-            border-bottom-right-radius: 5px;
-            border-bottom: 1px solid var(--lightgray);
-          }
-
             & > h3 {
               margin: 0;
             }
@@ -148,8 +185,7 @@
               gap: 0.4rem;
               margin: 0;
               margin-top: 0.45rem;
-            // Offset border radius
+              box-sizing: border-box;
-            margin-left: -2px;
               overflow: hidden;
               background-clip: border-box;
             }
@@ -179,3 +215,4 @@
       }
     }
   }
+}