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Check navigator safely in node

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This commit is contained in:
Daniel Imms
2021-04-02 08:33:00 -07:00
parent 4fa58c978b
commit a57910e2fa
1 changed files with 40 additions and 33 deletions
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addons/xterm-addon-ligatures/src/font.ts
+40 -33
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@@ -24,40 +24,47 @@ let fontsPromise: Promise<FontList | Record<string, IFontMetadata[]>> | undefine
* @param cacheSize The size of the ligature cache to maintain if the font is resolved
*/
export default async function load(fontFamily: string, cacheSize: number): Promise<Font | undefined> {
if (!fontsPromise && 'fonts' in navigator) {
try {
const status = await (navigator as any).permissions.request?.({
name: 'local-fonts'
});
if (status && status.state !== 'granted') {
throw new Error('Permission to access local fonts not granted.');
}
} catch (err) {
// A `TypeError` indicates the 'local-fonts'
// permission is not yet implemented, so
// only `throw` if this is _not_ the problem.
if (err.name !== 'TypeError') {
throw err;
}
}
const fonts: Record<string, IFontMetadata[]> = {};
try {
const fontsIterator: AsyncIterableIterator<IFontMetadata> = (navigator as any).fonts.query();
for await (const metadata of fontsIterator) {
if (!fonts.hasOwnProperty(metadata.family)) {
fonts[metadata.family] = [];
}
fonts[metadata.family].push(metadata);
}
fontsPromise = Promise.resolve(fonts);
} catch (err) {
console.error(err.name, err.message);
}
}
if (!fontsPromise) {
try {
fontsPromise = (await import('font-finder')).list();
} catch (err) {
// Web environment that supports font access API
if (typeof navigator !== 'undefined' && 'fonts' in navigator) {
try {
const status = await (navigator as any).permissions.request?.({
name: 'local-fonts'
});
if (status && status.state !== 'granted') {
throw new Error('Permission to access local fonts not granted.');
}
} catch (err) {
// A `TypeError` indicates the 'local-fonts'
// permission is not yet implemented, so
// only `throw` if this is _not_ the problem.
if (err.name !== 'TypeError') {
throw err;
}
}
const fonts: Record<string, IFontMetadata[]> = {};
try {
const fontsIterator: AsyncIterableIterator<IFontMetadata> = (navigator as any).fonts.query();
for await (const metadata of fontsIterator) {
if (!fonts.hasOwnProperty(metadata.family)) {
fonts[metadata.family] = [];
}
fonts[metadata.family].push(metadata);
}
fontsPromise = Promise.resolve(fonts);
} catch (err) {
console.error(err.name, err.message);
}
}
// Node environment or no font access API
else {
try {
fontsPromise = (await import('font-finder')).list();
} catch (err) {
// No-op
}
}
if (!fontsPromise) {
fontsPromise = Promise.resolve({});
}
}