feat: support glyphs option in Google Font (unjs#61)

src/providers/google.ts

@@ -38,6 +38,7 @@ export default defineFontProvider<ProviderOption>('google', async (_options = {}
   async function getFontDetails(family: string, options: ResolveFontOptions) {
     const font = googleFonts.find(font => font.family === family)!
     const styles = [...new Set(options.styles.map(i => styleMap[i]))].sort()
+    const glyphs = options.glyphs?.join('')
 
     const variableWeight = font.axes.find(a => a.tag === 'wght')
     const weights = variableWeight
@@ -73,6 +74,7 @@ export default defineFontProvider<ProviderOption>('google', async (_options = {}
         headers: { 'user-agent': userAgents[extension as keyof typeof userAgents] },
         query: {
           family: `${family}:${resolvedAxes.join(',')}@${resolvedVariants.join(';')}`,
+          ...(glyphs && { text: glyphs }),
         },
       })
     }

test/providers/google.test.ts

@@ -65,4 +65,35 @@ describe('google', () => {
     expect(resolvedStyles).toMatchObject(styles)
     expect(resolvedWeights).toMatchObject(weights)
   })
+
+  it('respects glyphs option and resolves optimized font', async () => {
+    const unifont = await createUnifont([providers.google()])
+
+    const { fonts } = await unifont.resolveFont('Poppins', {
+      glyphs: ['Hello', 'World'],
+      styles: ['normal'],
+      weights: ['400'],
+      subsets: [],
+    })
+
+    // Do not use sanitizeFontSource here, as we must test the url parameters
+    expect(fonts).toMatchInlineSnapshot(`
+      [
+        {
+          "src": [
+            {
+              "format": "woff2",
+              "url": "https://fonts.gstatic.com/l/font?kit=pxiEyp8kv8JHgFVrFJXUdVNFIvDDHy0hxgHa&skey=87759fb096548f6d&v=v22",
+            },
+            {
+              "format": "woff",
+              "url": "https://fonts.gstatic.com/l/font?kit=pxiEyp8kv8JHgFVrFJPMcBMSdJLnJzs&skey=87759fb096548f6d&v=v22",
+            },
+          ],
+          "style": "normal",
+          "weight": 400,
+        },
+      ]
+    `)
+  })
 })