stuff

node_modules/mathjax-full/ts/output/common/Wrappers/mfenced.ts

@@ -0,0 +1,144 @@
+/*************************************************************
+ *
+ *  Copyright (c) 2018-2022 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 CommonMfenced wrapper mixin for the MmlMfenced object
+ *
+ * @author dpvc@mathjax.org (Davide Cervone)
+ */
+
+import {AnyWrapper, WrapperConstructor, Constructor} from '../Wrapper.js';
+import {CommonInferredMrow} from './mrow.js';
+import {MmlNode, AbstractMmlNode} from '../../../core/MmlTree/MmlNode.js';
+import {MmlMfenced} from '../../../core/MmlTree/MmlNodes/mfenced.js';
+import {BBox} from '../../../util/BBox.js';
+
+/*****************************************************************/
+/**
+ * The CommonMfenced interface
+ */
+export interface CommonMfenced extends AnyWrapper {
+  /**
+   * An mrow to use for the layout of the mfenced
+   */
+  mrow: CommonInferredMrow;
+
+  /**
+   * Creates the mrow wrapper to use for the layout
+   */
+  createMrow(): void;
+
+  /**
+   * Populate the mrow with wrapped mo elements interleaved
+   *   with the mfenced children (the mo's are already created
+   *   in the mfenced object)
+   */
+  addMrowChildren(): void;
+
+  /**
+   * Wrap an mo element and push it onto the mrow
+   *
+   * @param {MmlNode} node  The mo element to push on the mrow
+   */
+  addMo(node: MmlNode): void;
+}
+
+/**
+ * Shorthand for the CommonMfenced constructor
+ */
+export type MfencedConstructor = Constructor<CommonMfenced>;
+
+/*****************************************************************/
+/**
+ * The CommonMfenced wrapper mixin for the MmlMfenced object
+ *
+ * @template T  The Wrapper class constructor type
+ */
+export function CommonMfencedMixin<T extends WrapperConstructor>(Base: T): MfencedConstructor & T {
+
+  return class extends Base {
+
+    /**
+     * An mrow to use for the layout of the mfenced
+     */
+    public mrow: CommonInferredMrow = null;
+
+    /**
+     * @override
+     * @constructor
+     */
+    constructor(...args: any[]) {
+      super(...args);
+      this.createMrow();
+      this.addMrowChildren();
+    }
+
+    /**
+     * Creates the mrow wrapper to use for the layout
+     */
+    public createMrow() {
+      const mmlFactory = (this.node as AbstractMmlNode).factory;
+      const mrow = mmlFactory.create('inferredMrow');
+      mrow.inheritAttributesFrom(this.node);
+      this.mrow = this.wrap(mrow) as CommonInferredMrow;
+      this.mrow.parent = this;
+    }
+
+    /**
+     * Populate the mrow with wrapped mo elements interleaved
+     *   with the mfenced children (the mo's are already created
+     *   in the mfenced object)
+     */
+    public addMrowChildren() {
+      const mfenced = this.node as MmlMfenced;
+      const mrow = this.mrow;
+      this.addMo(mfenced.open);
+      if (this.childNodes.length) {
+        mrow.childNodes.push(this.childNodes[0]);
+      }
+      let i = 0;
+      for (const child of this.childNodes.slice(1)) {
+        this.addMo(mfenced.separators[i++]);
+        mrow.childNodes.push(child);
+      }
+      this.addMo(mfenced.close);
+      mrow.stretchChildren();
+    }
+
+    /**
+     * Wrap an mo element and push it onto the mrow
+     *
+     * @param {MmlNode} node  The mo element to push on the mrow
+     */
+    public addMo(node: MmlNode) {
+      if (!node) return;
+      const mo = this.wrap(node);
+      this.mrow.childNodes.push(mo);
+      mo.parent = this.mrow;
+    }
+
+    /**
+     * @override
+     */
+    public computeBBox(bbox: BBox, recompute: boolean = false) {
+      bbox.updateFrom(this.mrow.getOuterBBox());
+      this.setChildPWidths(recompute);
+    }
+
+  };
+
+}