add initial marp implementation with sample content and build configuration

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

@@ -0,0 +1,104 @@
+/*************************************************************
+ *
+ *  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 CommonMroot wrapper mixin for the MmlMroot object
+ *
+ * @author dpvc@mathjax.org (Davide Cervone)
+ */
+
+import {Constructor} from '../../common/Wrapper.js';
+import {CommonMsqrt, MsqrtConstructor} from './msqrt.js';
+import {CommonMo} from './mo.js';
+import {BBox} from '../../../util/BBox.js';
+
+/*****************************************************************/
+/**
+ * The CommonMroot interface
+ */
+export interface CommonMroot extends CommonMsqrt {
+}
+
+/**
+ * Shorthand for the CommonMroot constructor
+ */
+export type MrootConstructor = Constructor<CommonMroot>;
+
+/*****************************************************************/
+/**
+ * The CommonMroot wrapper mixin for the MmlMroot object (extends CommonMsqrt)
+ *
+ * @template T  The Wrapper class constructor type
+ */
+export function CommonMrootMixin<T extends MsqrtConstructor>(Base: T): MrootConstructor & T {
+
+  return class extends Base {
+
+    /**
+     * @override
+     */
+    get surd() {
+      return 2;
+    }
+
+    /**
+     * @override
+     */
+    get root(): number {
+      return 1;
+    }
+
+    /**
+     * @override
+     */
+    public combineRootBBox(BBOX: BBox, sbox: BBox, H: number) {
+      const bbox = this.childNodes[this.root].getOuterBBox();
+      const h = this.getRootDimens(sbox, H)[1];
+      BBOX.combine(bbox, 0, h);
+    }
+
+    /**
+     * @override
+     */
+    public getRootDimens(sbox: BBox, H: number) {
+      const surd = this.childNodes[this.surd] as CommonMo;
+      const bbox = this.childNodes[this.root].getOuterBBox();
+      const offset = (surd.size < 0 ? .5 : .6) * sbox.w;
+      const {w, rscale} = bbox;
+      const W = Math.max(w, offset / rscale);
+      const dx = Math.max(0, W - w);
+      const h = this.rootHeight(bbox, sbox, surd.size, H);
+      const x = W * rscale - offset;
+      return [x, h, dx];
+    }
+
+    /**
+     * @param {BBox} rbox      The bbox of the root
+     * @param {BBox} sbox      The bbox of the surd
+     * @param {number} size    The size of the surd
+     * @param {number} H       The height of the root as a whole
+     * @return {number}        The height of the root within the surd
+     */
+    public rootHeight(rbox: BBox, sbox: BBox, size: number, H: number): number {
+      const h = sbox.h + sbox.d;
+      const b = (size < 0 ? 1.9 : .55 * h) - (h - H);
+      return b + Math.max(0, rbox.d * rbox.rscale);
+    }
+
+  };
+
+}