stuff

node_modules/mathjax-full/ts/output/chtml/Wrappers/mmultiscripts.ts

@@ -0,0 +1,139 @@
+/*************************************************************
+ *
+ *  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 CHTMLmmultiscripts wrapper for the MmlMmultiscripts object
+ *
+ * @author dpvc@mathjax.org (Davide Cervone)
+ */
+
+import {CHTMLWrapper, Constructor} from '../Wrapper.js';
+import {CHTMLmsubsup} from './msubsup.js';
+import {CommonMmultiscriptsMixin} from '../../common/Wrappers/mmultiscripts.js';
+import {MmlMmultiscripts} from '../../../core/MmlTree/MmlNodes/mmultiscripts.js';
+import {BBox} from '../../../util/BBox.js';
+import {StyleList} from '../../../util/StyleList.js';
+import {split} from '../../../util/string.js';
+
+/*****************************************************************/
+/**
+ * The CHTMLmmultiscripts wrapper for the MmlMmultiscripts object
+ *
+ * @template N  The HTMLElement node class
+ * @template T  The Text node class
+ * @template D  The Document class
+ */
+// @ts-ignore
+export class CHTMLmmultiscripts<N, T, D> extends
+CommonMmultiscriptsMixin<CHTMLWrapper<any, any, any>, Constructor<CHTMLmsubsup<any, any, any>>>(CHTMLmsubsup) {
+
+  /**
+   * The mmultiscripts wrapper
+   */
+  public static kind = MmlMmultiscripts.prototype.kind;
+
+  /**
+   * @override
+   */
+  public static styles: StyleList = {
+    'mjx-prescripts': {
+      display: 'inline-table',
+      'padding-left': '.05em'   // scriptspace
+    },
+    'mjx-scripts': {
+      display: 'inline-table',
+      'padding-right': '.05em'   // scriptspace
+    },
+    'mjx-prescripts > mjx-row > mjx-cell': {
+      'text-align': 'right'
+    },
+    '[script-align="left"] > mjx-row > mjx-cell': {
+      'text-align': 'left'
+    },
+    '[script-align="center"] > mjx-row > mjx-cell': {
+      'text-align': 'center'
+    },
+    '[script-align="right"] > mjx-row > mjx-cell': {
+      'text-align': 'right'
+    }
+  };
+
+  /*************************************************************/
+
+  /**
+   * @override
+   */
+  public toCHTML(parent: N) {
+    const chtml = this.standardCHTMLnode(parent);
+    const data = this.scriptData;
+    //
+    //  Get the alignment for the scripts
+    //
+    const scriptalign = this.node.getProperty('scriptalign') || 'right left';
+    const [preAlign, postAlign] = split(scriptalign + ' ' + scriptalign);
+    //
+    //  Combine the bounding boxes of the pre- and post-scripts,
+    //  and get the resulting baseline offsets
+    //
+    const sub = this.combinePrePost(data.sub, data.psub);
+    const sup = this.combinePrePost(data.sup, data.psup);
+    const [u, v] = this.getUVQ(sub, sup);
+    //
+    //  Place the pre-scripts, then the base, then the post-scripts
+    //
+    if (data.numPrescripts) {
+      const scripts = this.addScripts(u, -v, true, data.psub, data.psup, this.firstPrescript, data.numPrescripts);
+      preAlign !== 'right' && this.adaptor.setAttribute(scripts, 'script-align', preAlign);
+    }
+    this.childNodes[0].toCHTML(chtml);
+    if (data.numScripts) {
+      const scripts = this.addScripts(u, -v, false, data.sub, data.sup, 1, data.numScripts);
+      postAlign !== 'left' && this.adaptor.setAttribute(scripts, 'script-align', postAlign);
+    }
+  }
+
+  /**
+   * Create a table with the super and subscripts properly separated and aligned.
+   *
+   * @param {number} u       The baseline offset for the superscripts
+   * @param {number} v       The baseline offset for the subscripts
+   * @param {boolean} isPre  True for prescripts, false for scripts
+   * @param {BBox} sub       The subscript bounding box
+   * @param {BBox} sup       The superscript bounding box
+   * @param {number} i       The starting index for the scripts
+   * @param {number} n       The number of sub/super-scripts
+   * @return {N}             The script table for these scripts
+   */
+  protected addScripts(u: number, v: number, isPre: boolean, sub: BBox, sup: BBox, i: number, n: number): N {
+    const adaptor = this.adaptor;
+    const q = (u - sup.d) + (v - sub.h);             // separation of scripts
+    const U = (u < 0 && v === 0 ? sub.h + u : u);    // vertical offset of table
+    const rowdef = (q > 0 ? {style: {height: this.em(q)}} : {});
+    const tabledef = (U ? {style: {'vertical-align': this.em(U)}} : {});
+    const supRow = this.html('mjx-row');
+    const sepRow = this.html('mjx-row', rowdef);
+    const subRow = this.html('mjx-row');
+    const name = 'mjx-' + (isPre ? 'pre' : '') + 'scripts';
+    let m = i + 2 * n;
+    while (i < m) {
+      this.childNodes[i++].toCHTML(adaptor.append(subRow, this.html('mjx-cell')) as N);
+      this.childNodes[i++].toCHTML(adaptor.append(supRow, this.html('mjx-cell')) as N);
+    }
+    return adaptor.append(this.chtml, this.html(name, tabledef, [supRow, sepRow, subRow]));
+  }
+
+}