From 8a6ebd193933c2879c2a36e1b2f164889575d3bc Mon Sep 17 00:00:00 2001
From: Justin Fowler <justin.fowler@hey.com>
Date: Fri, 02 Feb 2024 04:17:21 +0000
Subject: [PATCH] docs: clarity for `RecentNotes` (#786)

---
 quartz/components/scripts/search.inline.ts |  154 +++++++++++++++++++++++++++++++++++++++------------
 1 files changed, 117 insertions(+), 37 deletions(-)

diff --git a/quartz/components/scripts/search.inline.ts b/quartz/components/scripts/search.inline.ts
index 0124e1f..8ead5c9 100644
--- a/quartz/components/scripts/search.inline.ts
+++ b/quartz/components/scripts/search.inline.ts
@@ -11,23 +11,29 @@
   tags: string[]
 }
 
-let index: FlexSearch.Document<Item> | undefined = undefined
-
 // Can be expanded with things like "term" in the future
 type SearchType = "basic" | "tags"
 
 // Current searchType
 let searchType: SearchType = "basic"
+// Current search term // TODO: exact match
+let currentSearchTerm: string = ""
+// index for search
+let index: FlexSearch.Document<Item> | undefined = undefined
 
 const contextWindowWords = 30
-const numSearchResults = 5
-const numTagResults = 3
-function highlight(searchTerm: string, text: string, trim?: boolean) {
-  // try to highlight longest tokens first
-  const tokenizedTerms = searchTerm
+const numSearchResults = 8
+const numTagResults = 5
+
+const tokenizeTerm = (term: string) =>
+  term
     .split(/\s+/)
     .filter((t) => t !== "")
     .sort((a, b) => b.length - a.length)
+
+function highlight(searchTerm: string, text: string, trim?: boolean) {
+  // try to highlight longest tokens first
+  const tokenizedTerms = tokenizeTerm(searchTerm)
   let tokenizedText = text.split(/\s+/).filter((t) => t !== "")
 
   let startIndex = 0
@@ -64,6 +70,7 @@
       }
       return tok
     })
+    .slice(startIndex, endIndex + 1)
     .join(" ")
 
   return `${startIndex === 0 ? "" : "..."}${slice}${
@@ -71,6 +78,45 @@
   }`
 }
 
+function highlightHTML(searchTerm: string, el: HTMLElement) {
+  // try to highlight longest tokens first
+  const p = new DOMParser()
+  const tokenizedTerms = tokenizeTerm(searchTerm)
+  const html = p.parseFromString(el.innerHTML, "text/html")
+
+  const createHighlightSpan = (text: string) => {
+    const span = document.createElement("span")
+    span.className = "highlight"
+    span.textContent = text
+    return span
+  }
+
+  const highlightTextNodes = (node: Node) => {
+    if (node.nodeType === Node.TEXT_NODE) {
+      let nodeText = node.nodeValue || ""
+      tokenizedTerms.forEach((term) => {
+        const regex = new RegExp(term.toLowerCase(), "gi")
+        const matches = nodeText.match(regex)
+        const spanContainer = document.createElement("span")
+        let lastIndex = 0
+        matches?.forEach((match) => {
+          const matchIndex = nodeText.indexOf(match, lastIndex)
+          spanContainer.appendChild(document.createTextNode(nodeText.slice(lastIndex, matchIndex)))
+          spanContainer.appendChild(createHighlightSpan(match))
+          lastIndex = matchIndex + match.length
+        })
+        spanContainer.appendChild(document.createTextNode(nodeText.slice(lastIndex)))
+        node.parentNode?.replaceChild(spanContainer, node)
+      })
+    } else if (node.nodeType === Node.ELEMENT_NODE) {
+      Array.from(node.childNodes).forEach(highlightTextNodes)
+    }
+  }
+
+  highlightTextNodes(html.body)
+  return html.body
+}
+
 const p = new DOMParser()
 const encoder = (str: string) => str.toLowerCase().split(/([^a-z]|[^\x00-\x7F])/)
 let prevShortcutHandler: ((e: HTMLElementEventMap["keydown"]) => void) | undefined = undefined
@@ -96,6 +142,7 @@
 
   const enablePreview = searchLayout?.dataset?.preview === "true"
   let preview: HTMLDivElement | undefined = undefined
+  let previewInner: HTMLDivElement | undefined = undefined
   const results = document.createElement("div")
   results.id = "results-container"
   results.style.flexBasis = enablePreview ? "30%" : "100%"
@@ -122,6 +169,9 @@
     if (preview) {
       removeAllChildren(preview)
     }
+    if (searchLayout) {
+      searchLayout.style.opacity = "0"
+    }
 
     searchType = "basic" // reset search type after closing
   }
@@ -135,6 +185,8 @@
     searchBar?.focus()
   }
 
+  let currentHover: HTMLInputElement | null = null
+
   async function shortcutHandler(e: HTMLElementEventMap["keydown"]) {
     if (e.key === "k" && (e.ctrlKey || e.metaKey) && !e.shiftKey) {
       e.preventDefault()
@@ -150,51 +202,61 @@
       if (searchBar) searchBar.value = "#"
     }
 
-    const resultCards = document.getElementsByClassName("result-card")
+    if (currentHover) {
+      currentHover.classList.remove("focus")
+    }
 
     // If search is active, then we will render the first result and display accordingly
     if (!container?.classList.contains("active")) return
-    else if (results?.contains(document.activeElement)) {
-      const active = document.activeElement as HTMLInputElement
-      await displayPreview(active)
-      if (e.key === "Enter") {
+    else if (e.key === "Enter") {
+      // If result has focus, navigate to that one, otherwise pick first result
+      if (results?.contains(document.activeElement)) {
+        const active = document.activeElement as HTMLInputElement
+        if (active.classList.contains("no-match")) return
+        await displayPreview(active)
         active.click()
+      } else {
+        const anchor = document.getElementsByClassName("result-card")[0] as HTMLInputElement | null
+        if (!anchor || anchor?.classList.contains("no-match")) return
+        await displayPreview(anchor)
+        anchor.click()
       }
-    } else {
-      const anchor = resultCards[0] as HTMLInputElement | null
-      await displayPreview(anchor)
-      if (e.key === "Enter") {
-        anchor?.click()
-      }
-    }
-
-    if (e.key === "ArrowUp" || (e.shiftKey && e.key === "Tab")) {
+    } else if (e.key === "ArrowUp" || (e.shiftKey && e.key === "Tab")) {
       e.preventDefault()
       if (results?.contains(document.activeElement)) {
         // If an element in results-container already has focus, focus previous one
-        const currentResult = document.activeElement as HTMLInputElement | null
+        const currentResult = currentHover
+          ? currentHover
+          : (document.activeElement as HTMLInputElement | null)
         const prevResult = currentResult?.previousElementSibling as HTMLInputElement | null
         currentResult?.classList.remove("focus")
         await displayPreview(prevResult)
         prevResult?.focus()
+        currentHover = prevResult
       }
     } else if (e.key === "ArrowDown" || e.key === "Tab") {
       e.preventDefault()
       // The results should already been focused, so we need to find the next one.
       // The activeElement is the search bar, so we need to find the first result and focus it.
-      if (!results?.contains(document.activeElement)) {
-        const firstResult = resultCards[0] as HTMLInputElement | null
+      if (document.activeElement === searchBar || currentHover !== null) {
+        const firstResult = currentHover
+          ? currentHover
+          : (document.getElementsByClassName("result-card")[0] as HTMLInputElement | null)
         const secondResult = firstResult?.nextElementSibling as HTMLInputElement | null
         firstResult?.classList.remove("focus")
         await displayPreview(secondResult)
         secondResult?.focus()
+        currentHover = secondResult
       } else {
         // If an element in results-container already has focus, focus next one
-        const active = document.activeElement as HTMLInputElement | null
+        const active = currentHover
+          ? currentHover
+          : (document.activeElement as HTMLInputElement | null)
         active?.classList.remove("focus")
         const nextResult = active?.nextElementSibling as HTMLInputElement | null
         await displayPreview(nextResult)
         nextResult?.focus()
+        currentHover = nextResult
       }
     }
   }
@@ -281,14 +343,18 @@
     })
 
     async function onMouseEnter(ev: MouseEvent) {
-      // When search is active, the first element is in focus, so we need to remove focus if given target is not the first element
-      const firstEl = document.getElementsByClassName("result-card")[0] as HTMLAnchorElement | null
-      const target = ev.target as HTMLAnchorElement
-      if (firstEl !== target) {
-        firstEl?.classList.remove("focus")
+      // Actually when we hover, we need to clean all highlights within the result childs
+      if (!ev.target) return
+      for (const el of document.getElementsByClassName(
+        "result-card",
+      ) as HTMLCollectionOf<HTMLElement>) {
+        el.classList.remove("focus")
+        el.blur()
       }
-      target.classList.add("focus")
+      const target = ev.target as HTMLInputElement
       await displayPreview(target)
+      currentHover = target
+      currentHover.classList.remove("focus")
     }
 
     async function onMouseLeave(ev: MouseEvent) {
@@ -318,7 +384,7 @@
 
     removeAllChildren(results)
     if (finalResults.length === 0) {
-      results.innerHTML = `<a class="result-card">
+      results.innerHTML = `<a class="result-card no-match">
                     <h3>No results.</h3>
                     <p>Try another search term?</p>
                 </a>`
@@ -327,8 +393,14 @@
     }
     // focus on first result, then also dispatch preview immediately
     if (results?.firstElementChild) {
-      results?.firstElementChild?.classList.add("focus")
-      await displayPreview(results?.firstElementChild as HTMLElement)
+      const firstChild = results.firstElementChild as HTMLElement
+      if (firstChild.classList.contains("no-match")) {
+        removeAllChildren(preview as HTMLElement)
+      } else {
+        firstChild.classList.add("focus")
+        currentHover = firstChild as HTMLInputElement
+        await displayPreview(firstChild)
+      }
     }
   }
 
@@ -360,22 +432,30 @@
     el.classList.add("focus")
 
     removeAllChildren(preview as HTMLElement)
-    const contentDetails = await fetchContent(slug)
 
-    const previewInner = document.createElement("div")
+    previewInner = document.createElement("div")
     previewInner.classList.add("preview-inner")
     preview?.appendChild(previewInner)
-    contentDetails?.forEach((elt) => previewInner.appendChild(elt))
+
+    const innerDiv = await fetchContent(slug).then((contents) =>
+      contents.map((el) => highlightHTML(currentSearchTerm, el as HTMLElement)),
+    )
+    previewInner.append(...innerDiv)
   }
 
   async function onType(e: HTMLElementEventMap["input"]) {
     let term = (e.target as HTMLInputElement).value
     let searchResults: FlexSearch.SimpleDocumentSearchResultSetUnit[]
+    currentSearchTerm = (e.target as HTMLInputElement).value
 
     if (searchLayout) {
       searchLayout.style.opacity = "1"
     }
 
+    if (term === "" && searchLayout) {
+      searchLayout.style.opacity = "0"
+    }
+
     if (term.toLowerCase().startsWith("#")) {
       searchType = "tags"
     } else {

--
Gitblit v1.10.0