remove loaders from FontBook

src/renderers/webgl/textures/font.ts

@@ -1,24 +1,5 @@
 import { BitmapFont, TextStyle } from 'pixi.js'
 import { MIN_ZOOM } from '../utils'
-import { throttle } from '../../../utils'
-import FontFaceObserver from 'fontfaceobserver'
-
-const warn = throttle((err) => console.warn(err), 0)
-
-const GENERIC_FONT_FAMILIES = new Set([
-  'serif',
-  'sans-serif',
-  'monospace',
-  'cursive',
-  'fantasy',
-  'system-ui',
-  'emoji',
-  'math',
-  'fangsong',
-  'ui-serif',
-  'ui-sans-serif',
-  'ui-monospace'
-])
 
 export class FontBook {
   static defaultResolution = 2
@@ -31,9 +12,6 @@ export class FontBook {
   scaleFactor: number
   chars: string | (string | string[])[]
 
-  private cache: { [family: string]: boolean } = {}
-  private loading: { [family: string]: Promise<void> } = {}
-
   constructor(
     resolution = FontBook.defaultResolution,
     maxFontSize = FontBook.defaultMaxFontSize,
@@ -50,40 +28,6 @@ export class FontBook {
     return BitmapFont.available[fontName]
   }
 
-  available(fontFamily: string | undefined, fontWeight: string | number | undefined = 'normal') {
-    const family = fontFamily?.split(', ')[0]
-    return (
-      family === undefined ||
-      this.cache[family] === true ||
-      GENERIC_FONT_FAMILIES.has(family) ||
-      document.fonts.check(`${fontWeight} 1em ${family}`)
-    )
-  }
-
-  async load(fontFamily: string | undefined, fontWeight: string | number | undefined = 'normal', timeout?: number) {
-    if (fontFamily === undefined || this.available(fontFamily, fontWeight)) {
-      return true
-    }
-
-    const family = fontFamily.split(', ')[0]
-
-    try {
-      if (!this.loading[family]) {
-        const weight = typeof fontWeight === 'string' && !isNaN(+fontWeight) ? +fontWeight : fontWeight
-        const font = new FontFaceObserver(family, { weight })
-        this.loading[family] = font.load(null, timeout)
-      }
-
-      await this.loading[family]
-      this.cache[family] = true
-    } catch (error) {
-      warn(error)
-      return false
-    }
-
-    return this.cache[family]
-  }
-
   create(fontName: string, style: TextStyle) {
     const font = FontBook.find(fontName)
 
@@ -95,12 +39,7 @@ export class FontBook {
     return font
   }
 
-  delete(fontName?: string) {
-    if (fontName === undefined) {
-      this.cache = {}
-      this.loading = {}
-    } else {
-      FontBook.find(fontName)?.destroy()
-    }
+  delete(fontName: string) {
+    FontBook.find(fontName)?.destroy()
   }
 }