Slightly improved treatment of mathchoice.

Author: zorkow

mathjax3-ts/input/tex/ParseMethods.ts

@@ -24,6 +24,7 @@
 
 // import * as sitem from './StackItem.js';
 import * as sitem from './StackItem.js';
+import {NewTex} from './Translate.js';
 import {Symbol} from './Symbol.js';
 import {CharacterMap} from './SymbolMap.js';
 import {TreeHelper} from './TreeHelper.js';
@@ -1511,7 +1512,7 @@ export namespace ParseMethods {
     let T  = parser.ParseArg(name);
     let S  = parser.ParseArg(name);
     let SS = parser.ParseArg(name);
-    parser.Push(D);
+    parser.Push(NewTex.display ? D : T);
     // parser.Push(MML.TeXmathchoice(D,T,S,SS));
   }
 

mathjax3-ts/input/tex/ParserUtil.ts

@@ -34,8 +34,6 @@ import {OldParser} from './OldParser.js';
 
 export namespace ParserUtil {
 
-  // export let OldParser = (x:any, {}) => x;
-  
   const emPerInch = 7.2;
   const pxPerInch = 72;
   const UNIT_CASES: {[key: string]: ((m: number) => number)}  = {

mathjax3-ts/input/tex/Translate.ts

@@ -37,6 +37,8 @@ export namespace NewTex {
 
   export type Script = {type: string, innerText: string, MathJax: any};
 
+  export let display: boolean = false;
+  
   export function Compile(tex: string, display: boolean): MmlNode {
     let script = {
       type:"math/tex"+(display?"; mode=display":""),
@@ -60,7 +62,7 @@ export namespace NewTex {
     let mml: MmlNode;
     let isError = false;
     let math = script.innerText;
-    let display = (script.type.replace(/\n/g," ").match(/(;|\s|\n)mode\s*=\s*display(;|\s|\n|$)/) != null);
+    display = (script.type.replace(/\n/g," ").match(/(;|\s|\n)mode\s*=\s*display(;|\s|\n|$)/) != null);
     try {
       mml = new OldParser(math, null, ParseMethods as any).mml();
       TreeHelper.printSimple(mml.toString());