add initial marp implementation with sample content and build configuration

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

@@ -0,0 +1,143 @@
+/*************************************************************
+ *
+ *  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 CommonTextNode wrapper mixin for the TextNode object
+ *
+ * @author dpvc@mathjax.org (Davide Cervone)
+ */
+
+import {AnyWrapper, WrapperConstructor, Constructor} from '../Wrapper.js';
+import {BBox} from '../../../util/BBox.js';
+import {TextNode} from '../../../core/MmlTree/MmlNode.js';
+
+/*****************************************************************/
+/**
+ * The CommonTextNode interface
+ */
+export interface CommonTextNode extends AnyWrapper {
+  /**
+   * @param {string} text     The text to remap
+   * @param {string} variant  The variant for the character
+   * @return {number[]}       The unicode points for the (remapped) text
+   */
+  remappedText(text: string, variant: string): number[];
+}
+
+/**
+ * Shorthand for the CommonTextNode constructor
+ */
+export type TextNodeConstructor = Constructor<CommonTextNode>;
+
+/*****************************************************************/
+/**
+ *  The CommonTextNode wrapper mixin for the TextNode object
+ *
+ * @template T  The Wrapper class constructor type
+ */
+export function CommonTextNodeMixin<T extends WrapperConstructor>(Base: T): TextNodeConstructor & T {
+
+  return class extends Base {
+
+    /**
+     * @override
+     */
+    public computeBBox(bbox: BBox, _recompute: boolean = false) {
+      const variant = this.parent.variant;
+      const text = (this.node as TextNode).getText();
+      if (variant === '-explicitFont') {
+        //
+        // Measure the size of the text (using the DOM if possible)
+        //
+        const font = this.jax.getFontData(this.parent.styles);
+        const {w, h, d} = this.jax.measureText(text, variant, font);
+        bbox.h = h;
+        bbox.d = d;
+        bbox.w = w;
+      } else {
+        const chars = this.remappedText(text, variant);
+        bbox.empty();
+        //
+        // Loop through the characters and add them in one by one
+        //
+        for (const char of chars) {
+          let [h, d, w, data] = this.getVariantChar(variant, char);
+          if (data.unknown) {
+            //
+            // Measure unknown characters using the DOM (if possible)
+            //
+            const cbox = this.jax.measureText(String.fromCodePoint(char), variant);
+            w = cbox.w;
+            h = cbox.h;
+            d = cbox.d;
+          }
+          //
+          // Update the bounding box
+          //
+          bbox.w += w;
+          if (h > bbox.h) bbox.h = h;
+          if (d > bbox.d) bbox.d = d;
+          bbox.ic = data.ic || 0;
+          bbox.sk = data.sk || 0;
+          bbox.dx = data.dx || 0;
+        }
+        if (chars.length > 1) {
+          bbox.sk = 0;
+        }
+        bbox.clean();
+      }
+    }
+
+    /**
+     * @param {string} text     The text to remap
+     * @param {string} variant  The variant for the character
+     * @return {number[]}       The unicode points for the (remapped) text
+     */
+    public remappedText(text: string, variant: string): number[] {
+      const c = this.parent.stretch.c;
+      return (c ? [c] : this.parent.remapChars(this.unicodeChars(text, variant)));
+    }
+
+    /******************************************************/
+    /*
+     * TextNodes don't need these, since these properties
+     *   are inherited from the parent nodes
+     */
+
+    /**
+     * @override
+     */
+    public getStyles() {}
+
+    /**
+     * @override
+     */
+    public getVariant() {}
+
+    /**
+     * @override
+     */
+    public getScale() {}
+
+    /**
+     * @override
+     */
+    public getSpace() {}
+
+  };
+
+}