add initial marp implementation with sample content and build configuration

node_modules/mathjax-full/ts/input/tex/braket/BraketItems.ts

@@ -0,0 +1,89 @@
+/*************************************************************
+ *
+ *  Copyright (c) 2009-2022 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 Stack items for parsing the braket package.
+ *
+ * @author v.sorge@mathjax.org (Volker Sorge)
+ */
+
+
+import {CheckType, BaseItem, StackItem} from '../StackItem.js';
+import {TEXCLASS} from '../../../core/MmlTree/MmlNode.js';
+import ParseUtil from '../ParseUtil.js';
+
+
+/**
+ * A bra-ket command. Collates elements from the opening brace to the closing
+ * brace, adding bars to a given maximal number (e.g., only one in case of
+ * set). To finalise it adds the surrounding angle brackets or braces.
+ */
+export class BraketItem extends BaseItem {
+
+  /**
+   * @override
+   */
+  get kind() {
+    return 'braket';
+  }
+
+  /**
+   * @override
+   */
+  get isOpen() {
+    return true;
+  }
+
+  /**
+   * @override
+   */
+  public checkItem(item: StackItem): CheckType {
+    if (item.isKind('close')) {
+      return [[this.factory.create('mml', this.toMml())], true];
+    }
+    if (item.isKind('mml')) {
+      this.Push(item.toMml());
+      if (this.getProperty('single')) {
+        return [[this.toMml()], true];
+      }
+      return BaseItem.fail;
+    }
+    return super.checkItem(item);
+  }
+
+
+  /**
+   * @override
+   */
+  public toMml() {
+    let inner = super.toMml();
+    let open = this.getProperty('open') as string;
+    let close = this.getProperty('close') as string;
+    if (this.getProperty('stretchy')) {
+      return ParseUtil.fenced(this.factory.configuration, open, inner, close);
+    }
+    let attrs = {fence: true, stretchy: false, symmetric: true, texClass: TEXCLASS.OPEN};
+    let openNode = this.create('token', 'mo', attrs, open);
+    attrs.texClass = TEXCLASS.CLOSE;
+    let closeNode = this.create('token', 'mo', attrs, close);
+    let mrow = this.create('node', 'mrow', [openNode, inner, closeNode],
+                         {open: open, close: close, texClass: TEXCLASS.INNER});
+    return mrow;
+  }
+
+}