feat(fonts): allow PageTitle to have its own font subset (#1848)

Felix Nie

2025-03-19 25979ab216ca2cc2539696420f23be8508d3184f

 quartz/plugins/emitters/componentResources.ts

@@ -1,4 +1,4 @@
import { FilePath, FullSlug, joinSegments } from "../../util/path"
import { FullSlug, joinSegments } from "../../util/path"
import { QuartzEmitterPlugin } from "../types"

// @ts-ignore
@@ -9,11 +9,15 @@
import popoverStyle from "../../components/styles/popover.scss"
import { BuildCtx } from "../../util/ctx"
import { QuartzComponent } from "../../components/types"
import { googleFontHref, joinStyles } from "../../util/theme"
import {
  googleFontHref,
  googleFontSubsetHref,
  joinStyles,
  processGoogleFonts,
} from "../../util/theme"
import { Features, transform } from "lightningcss"
import { transform as transpile } from "esbuild"
import { write } from "./helpers"
import DepGraph from "../../depgraph"

type ComponentResources = {
  css: string[]
@@ -24,7 +28,7 @@
function getComponentResources(ctx: BuildCtx): ComponentResources {
  const allComponents: Set<QuartzComponent> = new Set()
  for (const emitter of ctx.cfg.plugins.emitters) {
    const components = emitter.getQuartzComponents(ctx)
    const components = emitter.getQuartzComponents?.(ctx) ?? []
    for (const component of components) {
      allComponents.add(component)
    }
@@ -36,17 +40,21 @@
    afterDOMLoaded: new Set<string>(),
  }

  function normalizeResource(resource: string | string[] | undefined): string[] {
    if (!resource) return []
    if (Array.isArray(resource)) return resource
    return [resource]
  }

  for (const component of allComponents) {
    const { css, beforeDOMLoaded, afterDOMLoaded } = component
    if (css) {
      componentResources.css.add(css)
    }
    if (beforeDOMLoaded) {
      componentResources.beforeDOMLoaded.add(beforeDOMLoaded)
    }
    if (afterDOMLoaded) {
      componentResources.afterDOMLoaded.add(afterDOMLoaded)
    }
    const normalizedCss = normalizeResource(css)
    const normalizedBeforeDOMLoaded = normalizeResource(beforeDOMLoaded)
    const normalizedAfterDOMLoaded = normalizeResource(afterDOMLoaded)

    normalizedCss.forEach((c) => componentResources.css.add(c))
    normalizedBeforeDOMLoaded.forEach((b) => componentResources.beforeDOMLoaded.add(b))
    normalizedAfterDOMLoaded.forEach((a) => componentResources.afterDOMLoaded.add(a))
  }

  return {
@@ -82,7 +90,7 @@
    componentResources.afterDOMLoaded.push(`
      const gtagScript = document.createElement("script")
      gtagScript.src = "https://www.googletagmanager.com/gtag/js?id=${tagId}"
      gtagScript.async = true
      gtagScript.defer = true
      document.head.appendChild(gtagScript)

      window.dataLayer = window.dataLayer || [];
@@ -116,18 +124,69 @@
      const umamiScript = document.createElement("script")
      umamiScript.src = "${cfg.analytics.host ?? "https://analytics.umami.is"}/script.js"
      umamiScript.setAttribute("data-website-id", "${cfg.analytics.websiteId}")
      umamiScript.async = true

      umamiScript.setAttribute("data-auto-track", "false")
      umamiScript.defer = true
      document.head.appendChild(umamiScript)

      document.addEventListener("nav", () => {
        umami.track();
      })
    `)
  } else if (cfg.analytics?.provider === "goatcounter") {
    componentResources.afterDOMLoaded.push(`
      const goatcounterScript = document.createElement("script")
      goatcounterScript.src = "${cfg.analytics.scriptSrc ?? "https://gc.zgo.at/count.js"}"
      goatcounterScript.async = true
      goatcounterScript.defer = true
      goatcounterScript.setAttribute("data-goatcounter",
        "https://${cfg.analytics.websiteId}.${cfg.analytics.host ?? "goatcounter.com"}/count")
      document.head.appendChild(goatcounterScript)

      window.goatcounter = { no_onload: true }
      document.addEventListener("nav", () => {
        goatcounter.count({ path: location.pathname })
      })
    `)
  } else if (cfg.analytics?.provider === "posthog") {
    componentResources.afterDOMLoaded.push(`
      const posthogScript = document.createElement("script")
      posthogScript.innerHTML= \`!function(t,e){var o,n,p,r;e.__SV||(window.posthog=e,e._i=[],e.init=function(i,s,a){function g(t,e){var o=e.split(".");2==o.length&&(t=t[o[0]],e=o[1]),t[e]=function(){t.push([e].concat(Array.prototype.slice.call(arguments,0)))}}(p=t.createElement("script")).type="text/javascript",p.async=!0,p.src=s.api_host+"/static/array.js",(r=t.getElementsByTagName("script")[0]).parentNode.insertBefore(p,r);var u=e;for(void 0!==a?u=e[a]=[]:a="posthog",u.people=u.people||[],u.toString=function(t){var e="posthog";return"posthog"!==a&&(e+="."+a),t||(e+=" (stub)"),e},u.people.toString=function(){return u.toString(1)+".people (stub)"},o="capture identify alias people.set people.set_once set_config register register_once unregister opt_out_capturing has_opted_out_capturing opt_in_capturing reset isFeatureEnabled onFeatureFlags getFeatureFlag getFeatureFlagPayload reloadFeatureFlags group updateEarlyAccessFeatureEnrollment getEarlyAccessFeatures getActiveMatchingSurveys getSurveys onSessionId".split(" "),n=0;n<o.length;n++)g(u,o[n]);e._i.push([i,s,a])},e.__SV=1)}(document,window.posthog||[]);
      posthog.init('${cfg.analytics.apiKey}', {
        api_host: '${cfg.analytics.host ?? "https://app.posthog.com"}',
        capture_pageview: false,
      })\`
      document.head.appendChild(posthogScript)

      document.addEventListener("nav", () => {
        posthog.capture('$pageview', { path: location.pathname })
      })
    `)
  } else if (cfg.analytics?.provider === "tinylytics") {
    const siteId = cfg.analytics.siteId
    componentResources.afterDOMLoaded.push(`
      const tinylyticsScript = document.createElement("script")
      tinylyticsScript.src = "https://tinylytics.app/embed/${siteId}.js?spa"
      tinylyticsScript.defer = true
      document.head.appendChild(tinylyticsScript)

      document.addEventListener("nav", () => {
        window.tinylytics.triggerUpdate()
      })
    `)
  } else if (cfg.analytics?.provider === "cabin") {
    componentResources.afterDOMLoaded.push(`
      const cabinScript = document.createElement("script")
      cabinScript.src = "${cfg.analytics.host ?? "https://scripts.withcabin.com"}/hello.js"
      cabinScript.defer = true
      document.head.appendChild(cabinScript)
    `)
  } else if (cfg.analytics?.provider === "clarity") {
    componentResources.afterDOMLoaded.push(`
      const clarityScript = document.createElement("script")
      clarityScript.innerHTML= \`(function(c,l,a,r,i,t,y){c[a]=c[a]||function(){(c[a].q=c[a].q||[]).push(arguments)};
      t=l.createElement(r);t.defer=1;t.src="https://www.clarity.ms/tag/"+i;
      y=l.getElementsByTagName(r)[0];y.parentNode.insertBefore(t,y);
      })(window, document, "clarity", "script", "${cfg.analytics.projectId}");\`
      document.head.appendChild(clarityScript)
    `)
  }

@@ -148,14 +207,7 @@
export const ComponentResources: QuartzEmitterPlugin = () => {
  return {
    name: "ComponentResources",
    getQuartzComponents() {
      return []
    },
    async getDependencyGraph(_ctx, _content, _resources) {
      return new DepGraph<FilePath>()
    },
    async emit(ctx, _content, _resources): Promise<FilePath[]> {
      const promises: Promise<FilePath>[] = []
    async *emit(ctx, _content, _resources) {
      const cfg = ctx.cfg.configuration
      // component specific scripts and styles
      const componentResources = getComponentResources(ctx)
@@ -164,42 +216,42 @@
        // let the user do it themselves in css
      } else if (cfg.theme.fontOrigin === "googleFonts" && !cfg.theme.cdnCaching) {
        // when cdnCaching is true, we link to google fonts in Head.tsx
        let match
        const theme = ctx.cfg.configuration.theme
        const response = await fetch(googleFontHref(theme))
        googleFontsStyleSheet = await response.text()

        const fontSourceRegex = /url\((https:\/\/fonts.gstatic.com\/s\/[^)]+\.(woff2|ttf))\)/g
        if (theme.typography.title) {
          const title = ctx.cfg.configuration.pageTitle
          const response = await fetch(googleFontSubsetHref(theme, title))
          googleFontsStyleSheet += `\n${await response.text()}`
        }

        googleFontsStyleSheet = await (
          await fetch(googleFontHref(ctx.cfg.configuration.theme))
        ).text()

        while ((match = fontSourceRegex.exec(googleFontsStyleSheet)) !== null) {
          // match[0] is the `url(path)`, match[1] is the `path`
          const url = match[1]
          // the static name of this file.
          const [filename, ext] = url.split("/").pop()!.split(".")

          googleFontsStyleSheet = googleFontsStyleSheet.replace(
            url,
            `https://${cfg.baseUrl}/static/fonts/${filename}.ttf`,
        if (!cfg.baseUrl) {
          throw new Error(
            "baseUrl must be defined when using Google Fonts without cfg.theme.cdnCaching",
          )
        }

          promises.push(
            fetch(url)
              .then((res) => {
                if (!res.ok) {
                  throw new Error(`Failed to fetch font`)
                }
                return res.arrayBuffer()
              })
              .then((buf) =>
                write({
                  ctx,
                  slug: joinSegments("static", "fonts", filename) as FullSlug,
                  ext: `.${ext}`,
                  content: Buffer.from(buf),
                }),
              ),
          )
        const { processedStylesheet, fontFiles } = await processGoogleFonts(
          googleFontsStyleSheet,
          cfg.baseUrl,
        )
        googleFontsStyleSheet = processedStylesheet

        // Download and save font files
        for (const fontFile of fontFiles) {
          const res = await fetch(fontFile.url)
          if (!res.ok) {
            throw new Error(`Failed to fetch font ${fontFile.filename}`)
          }

          const buf = await res.arrayBuffer()
          yield write({
            ctx,
            slug: joinSegments("static", "fonts", fontFile.filename) as FullSlug,
            ext: `.${fontFile.extension}`,
            content: Buffer.from(buf),
          })
        }
      }

@@ -214,45 +266,45 @@
        ...componentResources.css,
        styles,
      )

      const [prescript, postscript] = await Promise.all([
        joinScripts(componentResources.beforeDOMLoaded),
        joinScripts(componentResources.afterDOMLoaded),
      ])

      promises.push(
        write({
          ctx,
          slug: "index" as FullSlug,
          ext: ".css",
          content: transform({
            filename: "index.css",
            code: Buffer.from(stylesheet),
            minify: true,
            targets: {
              safari: (15 << 16) | (6 << 8), // 15.6
              ios_saf: (15 << 16) | (6 << 8), // 15.6
              edge: 115 << 16,
              firefox: 102 << 16,
              chrome: 109 << 16,
            },
            include: Features.MediaQueries,
          }).code.toString(),
        }),
        write({
          ctx,
          slug: "prescript" as FullSlug,
          ext: ".js",
          content: prescript,
        }),
        write({
          ctx,
          slug: "postscript" as FullSlug,
          ext: ".js",
          content: postscript,
        }),
      )
      yield write({
        ctx,
        slug: "index" as FullSlug,
        ext: ".css",
        content: transform({
          filename: "index.css",
          code: Buffer.from(stylesheet),
          minify: true,
          targets: {
            safari: (15 << 16) | (6 << 8), // 15.6
            ios_saf: (15 << 16) | (6 << 8), // 15.6
            edge: 115 << 16,
            firefox: 102 << 16,
            chrome: 109 << 16,
          },
          include: Features.MediaQueries,
        }).code.toString(),
      })

      return await Promise.all(promises)
      yield write({
        ctx,
        slug: "prescript" as FullSlug,
        ext: ".js",
        content: prescript,
      })

      yield write({
        ctx,
        slug: "postscript" as FullSlug,
        ext: ".js",
        content: postscript,
      })
    },
    async *partialEmit() {},
  }
}