Make tex font packages work with \require

components/mjs/input/tex/extension.js

@@ -0,0 +1,20 @@
+import {combineDefaults} from '#js/components/global.js';
+
+export function fontExtension(id, name, pkg = `@mathjax/${name}`) {
+  if (MathJax.config?.loader) {
+    const FONTPATH = (typeof document === 'undefined' ? pkg :
+                      `https://cdn.jsdelivr.net/npm/${name}`);
+    const path = name.replace(/-font-extension$/, '-extension');
+    const extension = name.replace(/-font-extension$/, '');
+    combineDefaults(MathJax.config.loader, 'paths', {[path]: FONTPATH});
+    MathJax.config.loader[id] = {
+      checkReady() {
+        return MathJax.loader.load(
+          `[${path}]/${MathJax.config?.startup?.output || 'chtml'}`
+        ).then(() => {
+          MathJax.startup.document?.outputJax?.addExtension(extension);
+        });
+      }
+    };
+  }
+}

components/mjs/input/tex/extensions/bbm/bbm.js

@@ -1,17 +1,4 @@
 import './lib/bbm.js';
-import {MathJax, combineDefaults} from 'mathjax-full/js/components/global.js';
+import {fontExtension} from '../../extension.js';
 
-const FONTPATH = (typeof document === 'undefined' ?
-                   '@mathjax/mathjax-bbm-font-extension' :
-                   'https://cdn.jsdelivr.net/npm/mathjax-bbm-font-extension');
-
-if (MathJax.config?.loader) {
-  combineDefaults(MathJax.config.loader, 'paths', {
-    'mathjax-bbm-extension': FONTPATH
-  });
-  MathJax.config.loader['[tex]/bbm'] = {
-    checkReady() {
-      return MathJax.loader.load(`[mathjax-bbm-extension]/${MathJax.config?.startup?.output || 'chtml'}`);
-    }
-  };
-}
+fontExtension('[tex]/bbm', 'mathjax-bbm-font-extension');

components/mjs/input/tex/extensions/bboldx/bboldx.js

@@ -1,17 +1,4 @@
 import './lib/bboldx.js';
-import {MathJax, combineDefaults} from 'mathjax-full/js/components/global.js';
+import {fontExtension} from '../../extension.js';
 
-const FONTPATH = (typeof document === 'undefined' ?
-                   '@mathjax/mathjax-bboldx-font-extension' :
-                   'https://cdn.jsdelivr.net/npm/mathjax-bboldx-font-extension');
-
-if (MathJax.config?.loader) {
-  combineDefaults(MathJax.config.loader, 'paths', {
-    'mathjax-bboldx-extension': FONTPATH
-  });
-  MathJax.config.loader['[tex]/bboldx'] = {
-    checkReady() {
-      return MathJax.loader.load(`[mathjax-bboldx-extension]/${MathJax.config?.startup?.output || 'chtml'}`);
-    }
-  };
-}
+fontExtension('[tex]/bboldx', 'mathjax-bboldx-font-extension');

components/mjs/input/tex/extensions/dsfont/dsfont.js

@@ -1,17 +1,4 @@
 import './lib/dsfont.js';
-import {MathJax, combineDefaults} from 'mathjax-full/js/components/global.js';
+import {fontExtension} from '../../extension.js';
 
-const FONTPATH = (typeof document === 'undefined' ?
-                   '@mathjax/mathjax-dsfont-font-extension' :
-                   'https://cdn.jsdelivr.net/npm/mathjax-dsfont-font-extension');
-
-if (MathJax.config?.loader) {
-  combineDefaults(MathJax.config.loader, 'paths', {
-    'mathjax-dsfont-extension': FONTPATH
-  });
-  MathJax.config.loader['[tex]/dsfont'] = {
-    checkReady() {
-      return MathJax.loader.load(`[mathjax-dsfont-extension]/${MathJax.config?.startup?.output || 'chtml'}`);
-    }
-  };
-}
+fontExtension('[tex]/dsfont', 'mathjax-dsfont-font-extension');

ts/input/tex/bboldx/BboldxConfiguration.ts

@@ -52,11 +52,13 @@ export const BboldxConfiguration = Configuration.create('bboldx', {
     bboldx: {
       bfbb: false,
       light: false
-    },
-    // add text macros by default to textmacros
-    textmacros: {
-      packages: {'[+]': ['text-bboldx']}
     }
-  }
+  },
+  config(_config, jax) {
+    const {textConf, parseOptions} = jax.parseOptions.packageData.get('textmacros');
+    parseOptions.options.textmacros.packages.push('text-bboldx');
+    textConf.add('text-bboldx', jax, {});
+  },
+  priority: 3   // load before base, since we override \mathbb
 });
 

ts/output/chtml.ts

@@ -162,6 +162,17 @@ CommonOutputJax<
     this.wrapperUsage = new Usage<string>();
   }
 
+  /**
+   * @override
+   */
+  public addExtension(name: string): string[] {
+    const css = super.addExtension(name);
+    if (css.length && this.options.adaptiveCSS && this.chtmlStyles) {
+      this.adaptor.insertRules(this.chtmlStyles, css);
+    }
+    return [];
+  }
+
   /**
    * @override
    */

ts/output/chtml/FontData.ts

@@ -25,7 +25,7 @@ import {CharMap, CharOptions, CharDataArray, VariantData,
         DelimiterData, FontData, FontExtensionData, DIRECTION} from '../common/FontData.js';
 import {Usage} from './Usage.js';
 import {StringMap} from './Wrapper.js';
-import {StyleList, StyleData} from '../../util/StyleList.js';
+import {StyleList, StyleData, CssStyles} from '../../util/StyleList.js';
 import {em} from '../../util/lengths.js';
 
 export * from '../common/FontData.js';
@@ -188,6 +188,24 @@ export class ChtmlFontData extends FontData<ChtmlCharOptions, ChtmlVariantData,
     data.fonts && this.addDynamicFontCss(this.defaultStyles, data.fonts, data.fontURL);
   }
 
+  /**
+   * @override
+   */
+  public addExtension(
+    data: ChtmlFontExtensionData<ChtmlCharOptions, ChtmlDelimiterData>,
+    prefix: string = ''
+  ): string[] {
+    super.addExtension(data, prefix);
+    if (data.fonts && this.options.adaptiveCSS) {
+      const css = {};
+      const styles = new CssStyles();
+      (this.constructor as typeof ChtmlFontData).addDynamicFontCss(css, data.fonts, data.fontURL);
+      styles.addStyles(css);
+      return styles.getStyleRules();
+    }
+    return [];
+  }
+
   /***********************************************************************/
 
   /**

ts/output/common.ts

@@ -266,6 +266,17 @@ export abstract class CommonOutputJax<
     }
   }
 
+  /**
+   * Add a registered font extension to the output jax's font.
+   *
+   * @param {string} name   The name of the extension to add to this output jax's font
+   * @return {string[]}     New CSS rules needed for the font
+   */
+  public addExtension(name: string): string[] {
+    const font = this.font.CLASS.dynamicExtensions.get(name);
+    return this.font.addExtension(font.data);
+  }
+
 
   /*****************************************************************/
 

ts/output/common/FontData.ts

@@ -293,6 +293,7 @@ export type DynamicFont = {
   files: DynamicFileList;
   sizeN: number;
   stretchN: number;
+  data: FontExtensionData<any, any>
 };
 
 /**
@@ -623,7 +624,7 @@ export class FontData<C extends CharOptions, V extends VariantData<C>, D extends
   /**
    * The font extension dynamic data
    */
-  protected static dynamicExtensions: DynamicFontMap = new Map();
+  public static dynamicExtensions: DynamicFontMap = new Map();
 
   /**
    * The font options
@@ -792,7 +793,8 @@ export class FontData<C extends CharOptions, V extends VariantData<C>, D extends
       prefix: prefix,
       files: this.defineDynamicFiles(data.ranges, data.name),
       sizeN: this.defaultSizeVariants.length,
-      stretchN: this.defaultStretchVariants.length
+      stretchN: this.defaultStretchVariants.length,
+      data: data
     };
     this.dynamicExtensions.set(data.name, extension);
     for (const [src, dst] of [
@@ -853,14 +855,16 @@ export class FontData<C extends CharOptions, V extends VariantData<C>, D extends
    *
    * @param {FontExtensionData} data    The data for the font extension to merge into this font.
    * @param {string} prefix             The [prefix] to add to all component names
+   * @return {string[]}                 The new CSS rules needed for this extension
    */
-  public addExtension(data: FontExtensionData<C, D>, prefix: string = '') {
+  public addExtension(data: FontExtensionData<C, D>, prefix: string = ''): string[] {
     const dynamicFont = {
       name: data.name,
       prefix: prefix,
       files: this.CLASS.defineDynamicFiles(data.ranges, prefix),
       sizeN: this.sizeVariants.length,
-      stretchN: this.stretchVariants.length
+      stretchN: this.stretchVariants.length,
+      data: data
     };
     this.CLASS.dynamicExtensions.set(data.name, dynamicFont);
 
@@ -885,6 +889,7 @@ export class FontData<C extends CharOptions, V extends VariantData<C>, D extends
     if (data.ranges) {
       this.defineDynamicCharacters(dynamicFont.files);
     }
+    return [];
   }
 
   /**