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type MonoFont = {
id: string
family: string
regular: string
bold: string
}
let files: Record<string, () => Promise<string>> | undefined
function getFiles() {
if (files) return files
files = import.meta.glob("./assets/fonts/*.woff2", { import: "default" }) as Record<string, () => Promise<string>>
return files
}
export const MONO_NERD_FONTS = [
{
id: "jetbrains-mono",
family: "JetBrains Mono Nerd Font",
regular: "./assets/fonts/jetbrains-mono-nerd-font.woff2",
bold: "./assets/fonts/jetbrains-mono-nerd-font-bold.woff2",
},
{
id: "fira-code",
family: "Fira Code Nerd Font",
regular: "./assets/fonts/fira-code-nerd-font.woff2",
bold: "./assets/fonts/fira-code-nerd-font-bold.woff2",
},
{
id: "cascadia-code",
family: "Cascadia Code Nerd Font",
regular: "./assets/fonts/cascadia-code-nerd-font.woff2",
bold: "./assets/fonts/cascadia-code-nerd-font-bold.woff2",
},
{
id: "hack",
family: "Hack Nerd Font",
regular: "./assets/fonts/hack-nerd-font.woff2",
bold: "./assets/fonts/hack-nerd-font-bold.woff2",
},
{
id: "source-code-pro",
family: "Source Code Pro Nerd Font",
regular: "./assets/fonts/source-code-pro-nerd-font.woff2",
bold: "./assets/fonts/source-code-pro-nerd-font-bold.woff2",
},
{
id: "inconsolata",
family: "Inconsolata Nerd Font",
regular: "./assets/fonts/inconsolata-nerd-font.woff2",
bold: "./assets/fonts/inconsolata-nerd-font-bold.woff2",
},
{
id: "roboto-mono",
family: "Roboto Mono Nerd Font",
regular: "./assets/fonts/roboto-mono-nerd-font.woff2",
bold: "./assets/fonts/roboto-mono-nerd-font-bold.woff2",
},
{
id: "ubuntu-mono",
family: "Ubuntu Mono Nerd Font",
regular: "./assets/fonts/ubuntu-mono-nerd-font.woff2",
bold: "./assets/fonts/ubuntu-mono-nerd-font-bold.woff2",
},
{
id: "intel-one-mono",
family: "Intel One Mono Nerd Font",
regular: "./assets/fonts/intel-one-mono-nerd-font.woff2",
bold: "./assets/fonts/intel-one-mono-nerd-font-bold.woff2",
},
{
id: "meslo-lgs",
family: "Meslo LGS Nerd Font",
regular: "./assets/fonts/meslo-lgs-nerd-font.woff2",
bold: "./assets/fonts/meslo-lgs-nerd-font-bold.woff2",
},
{
id: "iosevka",
family: "Iosevka Nerd Font",
regular: "./assets/fonts/iosevka-nerd-font.woff2",
bold: "./assets/fonts/iosevka-nerd-font-bold.woff2",
},
{
id: "geist-mono",
family: "GeistMono Nerd Font",
regular: "./assets/fonts/GeistMonoNerdFontMono-Regular.woff2",
bold: "./assets/fonts/GeistMonoNerdFontMono-Bold.woff2",
},
] satisfies MonoFont[]
const mono = Object.fromEntries(MONO_NERD_FONTS.map((font) => [font.id, font])) as Record<string, MonoFont>
const loads = new Map<string, Promise<void>>()
function css(font: { family: string; regular: string; bold: string }) {
return `
@font-face {
font-family: "${font.family}";
src: url("${font.regular}") format("woff2");
font-display: swap;
font-style: normal;
font-weight: 400;
}
@font-face {
font-family: "${font.family}";
src: url("${font.bold}") format("woff2");
font-display: swap;
font-style: normal;
font-weight: 700;
}
`
}
export function ensureMonoFont(id: string | undefined) {
if (!id || id === "ibm-plex-mono") return Promise.resolve()
if (typeof document !== "object") return Promise.resolve()
const font = mono[id]
if (!font) return Promise.resolve()
const styleId = `oc-font-${font.id}`
if (document.getElementById(styleId)) return Promise.resolve()
const hit = loads.get(font.id)
if (hit) return hit
const files = getFiles()
const load = Promise.all([files[font.regular]?.(), files[font.bold]?.()]).then(([regular, bold]) => {
if (!regular || !bold) return
if (document.getElementById(styleId)) return
const style = document.createElement("style")
style.id = styleId
style.textContent = css({ family: font.family, regular, bold })
document.head.appendChild(style)
})
loads.set(font.id, load)
return load
}
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