add initial marp implementation with sample content and build configuration

node_modules/mathjax-full/ts/handlers/html/HTMLHandler.ts

@@ -0,0 +1,86 @@
+/*************************************************************
+ *
+ *  Copyright (c) 2017-2022 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  Implements the HTMLHandler class
+ *
+ * @author dpvc@mathjax.org (Davide Cervone)
+ */
+
+import {AbstractHandler} from '../../core/Handler.js';
+import {MinHTMLAdaptor} from '../../adaptors/HTMLAdaptor.js';
+import {HTMLDocument} from './HTMLDocument.js';
+import {OptionList} from '../../util/Options.js';
+
+/*****************************************************************/
+/**
+ *  Implements the HTMLHandler class (extends AbstractHandler)
+ *
+ * @template N  The HTMLElement node class
+ * @template T  The Text node class
+ * @template D  The Document class
+ */
+export class HTMLHandler<N, T, D> extends AbstractHandler<N, T, D> {
+
+  /**
+   * The DOMAdaptor for the document being handled
+   */
+  public adaptor: MinHTMLAdaptor<N, T, D>;  // declare a more specific adaptor type
+
+  /**
+   * @override
+   */
+  public documentClass = HTMLDocument;
+
+  /**
+   * @override
+   */
+  public handlesDocument(document: any) {
+    const adaptor = this.adaptor;
+    if (typeof(document) === 'string') {
+      try {
+        document = adaptor.parse(document, 'text/html');
+      } catch (err) {}
+    }
+    if (document instanceof adaptor.window.Document ||
+        document instanceof adaptor.window.HTMLElement ||
+        document instanceof adaptor.window.DocumentFragment) {
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * If the document isn't already a Document object, create one
+   * using the given data
+   *
+   * @override
+   */
+  public create(document: any, options: OptionList) {
+    const adaptor = this.adaptor;
+    if (typeof(document) === 'string') {
+      document = adaptor.parse(document, 'text/html');
+    } else if (document instanceof adaptor.window.HTMLElement ||
+               document instanceof adaptor.window.DocumentFragment) {
+      let child = document as N;
+      document = adaptor.parse('', 'text/html');
+      adaptor.append(adaptor.body(document), child);
+    }
+    return super.create(document, options) as HTMLDocument<N, T, D>;
+  }
+
+}