-
Notifications
You must be signed in to change notification settings - Fork 4
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
feat: add
extractFontFaceData utility
- Loading branch information
Showing
5 changed files
with
253 additions
and
111 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| import { findAll, parse, type Declaration } from 'css-tree' | ||
|
|
||
| import type { FontFaceData, FontSource, RemoteFontSource } from '../types' | ||
|
|
||
| export function extractFontFaceData (css: string): FontFaceData[] { | ||
| const fontFaces: FontFaceData[] = [] | ||
|
|
||
| for (const node of findAll(parse(css), node => node.type === 'Atrule' && node.name === 'font-face')) { | ||
| if (node.type !== 'Atrule' || node.name !== 'font-face') { continue } | ||
|
|
||
| const data: Partial<FontFaceData> = {} | ||
| const keyMap: Record<string, keyof FontFaceData> = { | ||
| src: 'src', | ||
| 'font-display': 'display', | ||
| 'font-weight': 'weight', | ||
| 'font-style': 'style', | ||
| 'font-feature-settings': 'featureSettings', | ||
| 'font-variations-settings': 'variationSettings', | ||
| 'unicode-range': 'unicodeRange', | ||
| } | ||
| for (const child of node.block?.children || []) { | ||
| if (child.type !== 'Declaration') { continue } | ||
| if (child.property in keyMap) { | ||
| data[keyMap[child.property]!] = extractCSSValue(child) as any | ||
| } | ||
| } | ||
| fontFaces.push(data as FontFaceData) | ||
| } | ||
|
|
||
| return fontFaces | ||
| } | ||
|
|
||
| function extractCSSValue (node: Declaration) { | ||
| if (node.value.type == 'Raw') { | ||
| return [node.value.value] | ||
| } | ||
|
|
||
| const values = [] as Array<string | number | FontSource> | ||
| for (const child of node.value.children) { | ||
| if (child.type === 'Function') { | ||
| if (child.name === 'local' && child.children.first?.type === 'String') { | ||
| values.push({ name: child.children.first.value }) | ||
| } | ||
| if (child.name === 'format' && child.children.first?.type === 'String') { | ||
| (values.at(-1) as RemoteFontSource).format = child.children.first.value | ||
| } | ||
| if (child.name === 'tech' && child.children.first?.type === 'String') { | ||
| (values.at(-1) as RemoteFontSource).tech = child.children.first.value | ||
| } | ||
| } | ||
| if (child.type === 'Url') { | ||
| values.push({ | ||
| url: child.value, | ||
| }) | ||
| } | ||
| if (child.type === 'Identifier') { | ||
| values.push(child.name) | ||
| } | ||
| if (child.type === 'String') { | ||
| values.push(child.value) | ||
| } | ||
| if (child.type === 'UnicodeRange') { | ||
| values.push(child.value) | ||
| } | ||
| if (child.type === 'Number') { | ||
| values.push(Number(child.value)) | ||
| } | ||
| } | ||
|
|
||
| if (values.length === 1) { | ||
| return values[0] | ||
| } | ||
|
|
||
| return values | ||
| } | ||
|
|
||
|
|
||
| // https://developer.mozilla.org/en-US/docs/Web/CSS/font-family | ||
| const genericCSSFamilies = new Set([ | ||
| /* A generic family name only */ | ||
| 'serif', | ||
| 'sans-serif', | ||
| 'monospace', | ||
| 'cursive', | ||
| 'fantasy', | ||
| 'system-ui', | ||
| 'ui-serif', | ||
| 'ui-sans-serif', | ||
| 'ui-monospace', | ||
| 'ui-rounded', | ||
| 'emoji', | ||
| 'math', | ||
| 'fangsong', | ||
|
|
||
| /* Global values */ | ||
| 'inherit', | ||
| 'initial', | ||
| 'revert', | ||
| 'revert-layer', | ||
| 'unset', | ||
| ]) | ||
|
|
||
| export function extractFontFamilies (node: Declaration) { | ||
| if (node.value.type == 'Raw') { | ||
| return [node.value.value] | ||
| } | ||
|
|
||
| const families = [] as string[] | ||
| for (const child of node.value.children) { | ||
| if (child.type === 'Identifier' && !genericCSSFamilies.has(child.name)) { | ||
| families.push(child.name) | ||
| } | ||
| if (child.type === 'String') { | ||
| families.push(child.value) | ||
| } | ||
| } | ||
|
|
||
| return families | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| import { hasProtocol } from 'ufo' | ||
| import type { FontFaceData, FontSource } from '../types' | ||
| import { extname } from 'pathe' | ||
|
|
||
| export function generateFontFaces (family: string, source: FontFaceData | FontFaceData[]) { | ||
| const sources = Array.isArray(source) ? source : [source] | ||
| const declarations: string[] = [] | ||
| for (const font of sources) { | ||
| const src = Array.isArray(font.src) ? font.src : [font.src] | ||
| const sources = src.map(s => typeof s === 'string' ? parseFont(s) : s) | ||
|
|
||
| declarations.push([ | ||
| '@font-face {', | ||
| ` font-family: '${family}';`, | ||
| ` src: ${renderFontSrc(sources)};`, | ||
| ` font-display: ${font.display || 'swap'};`, | ||
| font.unicodeRange && ` unicode-range: ${font.unicodeRange};`, | ||
| font.weight && ` font-weight: ${font.weight};`, | ||
| font.style && ` font-style: ${font.style};`, | ||
| font.featureSettings && ` font-feature-settings: ${font.featureSettings};`, | ||
| font.variationSettings && ` font-variation-settings: ${font.variationSettings};`, | ||
| `}` | ||
| ].filter(Boolean).join('\n')) | ||
| } | ||
|
|
||
| return declarations | ||
| } | ||
|
|
||
| const formatMap: Record<string, string> = { | ||
| otf: 'opentype', | ||
| woff: 'woff', | ||
| woff2: 'woff2', | ||
| ttf: 'truetype', | ||
| eot: 'embedded-opentype', | ||
| svg: 'svg', | ||
| } | ||
|
|
||
| function parseFont (font: string) { | ||
| // render as `url("url/to/font") format("woff2")` | ||
| if (font.startsWith('/') || hasProtocol(font)) { | ||
| const extension = extname(font).slice(1) | ||
| const format = formatMap[extension] | ||
|
|
||
| return { | ||
| url: font, | ||
| format | ||
| } | ||
| } | ||
|
|
||
| // render as `local("Font Name")` | ||
| return { name: font } | ||
| } | ||
|
|
||
| function renderFontSrc (sources: Exclude<FontSource, string>[]) { | ||
| return sources.map(src => { | ||
| if ('url' in src) { | ||
| let rendered = `url("${src.url}")` | ||
| for (const key of ['format', 'tech'] as const) { | ||
| if (key in src) { | ||
| rendered += ` ${key}(${src[key]})` | ||
| } | ||
| } | ||
| return rendered | ||
| } | ||
| return `local("${src.name}")` | ||
| }).join(', ') | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| import { describe, expect, it } from 'vitest' | ||
| import { extractFontFaceData } from '../src/css/parse' | ||
|
|
||
| describe('extract font face from CSS', () => { | ||
| it('should add declarations for `font-family`', async () => { | ||
| expect(extractFontFaceData(` | ||
| @font-face { | ||
| font-family: 'Open Sans'; | ||
| font-style: normal; | ||
| font-display: swap; | ||
| font-weight: 500; | ||
| src: local("Open Sans"), url(./files/open-sans-latin-500-normal.woff2) format('woff2'), url(./files/open-sans-latin-500-normal.woff) format('woff'); | ||
| unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; | ||
| } | ||
| `)) | ||
| .toMatchInlineSnapshot(` | ||
| [ | ||
| { | ||
| "display": "swap", | ||
| "src": [ | ||
| { | ||
| "name": "Open Sans", | ||
| }, | ||
| { | ||
| "format": "woff2", | ||
| "url": "./files/open-sans-latin-500-normal.woff2", | ||
| }, | ||
| { | ||
| "format": "woff", | ||
| "url": "./files/open-sans-latin-500-normal.woff", | ||
| }, | ||
| ], | ||
| "style": "normal", | ||
| "unicodeRange": [ | ||
| "U+0000-00FF", | ||
| "U+0131", | ||
| "U+0152-0153", | ||
| "U+02BB-02BC", | ||
| "U+02C6", | ||
| "U+02DA", | ||
| "U+02DC", | ||
| "U+0304", | ||
| "U+0308", | ||
| "U+0329", | ||
| "U+2000-206F", | ||
| "U+2074", | ||
| "U+20AC", | ||
| "U+2122", | ||
| "U+2191", | ||
| "U+2193", | ||
| "U+2212", | ||
| "U+2215", | ||
| "U+FEFF", | ||
| "U+FFFD", | ||
| ], | ||
| "weight": 500, | ||
| }, | ||
| ] | ||
| `) | ||
| }) | ||
| }) |