Merge pull request #1055 from mathjax/package/bbm

Adds the bbm package.

Author: zorkow

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

@@ -0,0 +1,17 @@
+import './lib/bbm.js';
+import {MathJax, combineDefaults} from 'mathjax-full/js/components/global.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'}`);
+    }
+  };
+}

components/mjs/input/tex/extensions/bbm/config.json

@@ -0,0 +1,14 @@
+{
+  "build": {
+    "id": "[tex]/bbm",
+    "component": "input/tex/extensions/bbm",
+    "targets": ["input/tex/bbm"]
+  },
+  "webpack": {
+    "name": "input/tex/extensions/bbm",
+    "libs": [
+      "components/src/input/tex-base/lib",
+      "components/src/core/lib"
+    ]
+  }
+}

ts/input/tex/bbm/BbmConfiguration.ts

@@ -0,0 +1,67 @@
+/*************************************************************
+ *
+ *  Copyright (c) 2017-2023 The MathJax Consortium
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+
+/**
+ * @fileoverview The bbm package.
+ *
+ * @author v.sorge@mathjax.org (Volker Sorge)
+ */
+
+import {Configuration} from '../Configuration.js';
+import {CommandMap} from '../TokenMap.js';
+import BaseMethods from '../base/BaseMethods.js';
+import {ParseMethod} from '../Types.js';
+import TexParser from '../TexParser.js';
+
+/**
+ * The methods that implement the bbm package.
+ */
+let BbmMethods: Record<string, ParseMethod> = {};
+
+BbmMethods.MathFont = BaseMethods.MathFont;
+BbmMethods.ChooseFont = function(parser: TexParser, name: string,
+                                 regular: string, bold: string) {
+  BaseMethods.MathFont(parser, name, parser.options.bbm.bold ? bold : regular);
+}
+BbmMethods.ChangeBold = function(parser: TexParser, name: string) {
+  const font = parser.GetArgument(name);
+  parser.options.bbm.bold = (font === 'bold' ? true : false);
+}
+
+
+new CommandMap('bbm', {
+  mathversion: 'ChangeBold',
+  mathbbm: ['ChooseFont', '-bbm-normal', '-bbm-bold'],
+  mathbbmss: ['ChooseFont', '-bbm-sans-serif', '-bbm-sans-serif-bold'],
+  mathbbmtt: ['MathFont', '-bbm-monospace']
+}, BbmMethods);
+
+//
+//  Define the package configuration, including switch for sans serif.
+//
+export const BbmConfiguration = Configuration.create('bbm', {
+  handler: {
+    macro: ['bbm'],
+  },
+  options: {
+    bbm: {
+      bold: false
+    }
+  }
+});
+