add initial marp implementation with sample content and build configuration

node_modules/mathjax-full/ts/util/FunctionList.ts

@@ -0,0 +1,97 @@
+/*************************************************************
+ *
+ *  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  Implement FunctionList object
+ *
+ * @author dpvc@mathjax.org (Davide Cervone)
+ */
+
+import {PrioritizedList, PrioritizedListItem} from './PrioritizedList.js';
+
+/*****************************************************************/
+/**
+ *  The FunctionListItem interface (extends PrioritizedListItem<Function>)
+ */
+
+export interface FunctionListItem extends PrioritizedListItem<Function> {}
+
+/*****************************************************************/
+/**
+ *  Implements the FunctionList class (extends PrioritizedList<Function>)
+ */
+
+export class FunctionList extends PrioritizedList<Function> {
+
+  /**
+   * Executes the functions in the list (in prioritized order),
+   *   passing the given data to the functions.  If any return
+   *   false, the list is terminated.
+   *
+   * @param {any[]} data  The array of arguments to pass to the functions
+   * @return {boolean}    False if any function stopped the list by
+   *                       returning false, true otherwise
+   */
+  public execute(...data: any[]): boolean {
+    for (const item of this) {
+      let result = item.item(...data);
+      if (result === false) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  /**
+   * Executes the functions in the list (in prioritized order) asynchronously,
+   *   passing the given data to the functions, and doing the next function
+   *   only when the previous one completes.  If the function returns a
+   *   Promise, then use that to control the flow.  Otherwise, if the
+   *   function returns false, the list is terminated.
+   * This function returns a Promise.  If any function in the list fails,
+   *   the promise fails.  If any function returns false, the promise
+   *   succeeds, but passes false as its argument.  Otherwise it succeeds
+   *   and passes true.
+   *
+   * @param {any[]} data  The array of arguments to pass to the functions
+   * @return {Promise}    The promise that is satisfied when the function
+   *                       list completes (with argument true or false
+   *                       depending on whether some function returned
+   *                       false or not).
+   */
+  public asyncExecute(...data: any[]): Promise<void> {
+    let i = -1;
+    let items = this.items;
+    return new Promise((ok: Function, fail: Function) => {
+      (function execute() {
+        while (++i < items.length) {
+          let result = items[i].item(...data);
+          if (result instanceof Promise) {
+            result.then(execute).catch(err => fail(err));
+            return;
+          }
+          if (result === false) {
+            ok(false);
+            return;
+          }
+        }
+        ok(true);
+      })();
+    });
+  }
+
+}