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perf: compute mapping of folder name to file data for faster breadcrumbs

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This commit is contained in:
Jacky Zhao 2023-11-11 21:06:37 -08:00
parent d1551872ff
commit 43d638a6de
2 changed files with 26 additions and 27 deletions
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6
docs/features/breadcrumbs.md
View File

@ -16,10 +16,10 @@ For example, here's what the default configuration looks like:
```typescript title="quartz.layout.ts"
Component.Breadcrumbs({
spacerSymbol: ">", // symbol between crumbs
spacerSymbol: "❯", // symbol between crumbs
rootName: "Home", // name of first/root element
resolveFrontmatterTitle: false, // wether to resolve folder names through frontmatter titles (more computationally expensive)
hideOnRoot: true, // wether to hide breadcrumbs on root `index.md` page
resolveFrontmatterTitle: true, // whether to resolve folder names through frontmatter titles
hideOnRoot: true, // whether to hide breadcrumbs on root `index.md` page
})
```

45
quartz/components/Breadcrumbs.tsx
View File

@ -41,25 +41,13 @@ function formatCrumb(displayName: string, baseSlug: FullSlug, currentSlug: Simpl
}
}
// given a folderName (e.g. "features"), search for the corresponding `index.md` file
function findCurrentFile(allFiles: QuartzPluginData[], folderName: string) {
return allFiles.find((file) => {
if (file.slug?.endsWith("index")) {
const folderParts = file.filePath?.split("/")
if (folderParts) {
const name = folderParts[folderParts?.length - 2]
if (name === folderName) {
return true
}
}
}
})
}
export default ((opts?: Partial<BreadcrumbOptions>) => {
// Merge options with defaults
const options: BreadcrumbOptions = { ...defaultOptions, ...opts }
// computed index of folder name to its associated file data
let folderIndex: Map<string, QuartzPluginData> | undefined
function Breadcrumbs({ fileData, allFiles, displayClass }: QuartzComponentProps) {
// Hide crumbs on root if enabled
if (options.hideOnRoot && fileData.slug === "index") {
@ -70,28 +58,39 @@ export default ((opts?: Partial<BreadcrumbOptions>) => {
const firstEntry = formatCrumb(options.rootName, fileData.slug!, "/" as SimpleSlug)
const crumbs: CrumbData[] = [firstEntry]
if (!folderIndex && options.resolveFrontmatterTitle) {
folderIndex = new Map()
// construct the index for the first time
for (const file of allFiles) {
if (file.slug?.endsWith("index")) {
const folderParts = file.filePath?.split("/")
if (folderParts) {
const folderName = folderParts[folderParts?.length - 2]
folderIndex.set(folderName, file)
}
}
}
}
// Split slug into hierarchy/parts
const slugParts = fileData.slug?.split("/")
if (slugParts) {
// full path until current part
let currentPath = ""
for (let i = 0; i < slugParts.length - 1; i++) {
let currentTitle = slugParts[i]
let curPathSegment = slugParts[i]
// TODO: performance optimizations/memoizing
// Try to resolve frontmatter folder title
if (options?.resolveFrontmatterTitle) {
// try to find file for current path
const currentFile = findCurrentFile(allFiles, currentTitle)
const currentFile = folderIndex?.get(curPathSegment)
if (currentFile) {
currentTitle = currentFile.frontmatter!.title
}
curPathSegment = currentFile.frontmatter!.title
}
// Add current slug to full path
currentPath += slugParts[i] + "/"
// Format and add current crumb
const crumb = formatCrumb(currentTitle, fileData.slug!, currentPath as SimpleSlug)
const crumb = formatCrumb(curPathSegment, fileData.slug!, currentPath as SimpleSlug)
crumbs.push(crumb)
}