Add esdiff package implementing \diff and \diffp

components/mjs/dependencies.js

@@ -42,6 +42,7 @@ export const dependencies = {
   '[tex]/dsfont': ['input/tex-base'],
   '[tex]/empheq': ['input/tex-base', '[tex]/ams'],
   '[tex]/enclose': ['input/tex-base'],
+  '[tex]/esdiff': ['input/tex-base'],
   '[tex]/extpfeil': ['input/tex-base', '[tex]/newcommand', '[tex]/ams'],
   '[tex]/gensymb': ['input/tex-base'],
   '[tex]/html': ['input/tex-base'],

components/mjs/input/tex/extensions/esdiff/config.json

@@ -0,0 +1,20 @@
+{
+  "build": {
+    "id": "[tex]/esdiff",
+    "component": "input/tex/extensions/esdiff",
+    "targets": ["input/tex/esdiff"]
+  },
+  "copy": {
+    "to": "[bundle]/input/tex/extensions/esdiff",
+    "from": "[ts]/input/tex/esdiff",
+    "copy": ["__locales__"],
+    "excludes": ["__locales__/Component.ts", "__locales__/preload.cts"]
+  },
+  "webpack": {
+    "name": "input/tex/extensions/esdiff",
+    "libs": [
+      "components/src/input/tex-base/lib",
+      "components/src/core/lib"
+    ]
+  }
+}

components/mjs/input/tex/extensions/esdiff/esdiff.d.ts

@@ -0,0 +1 @@
+export {};

components/mjs/input/tex/extensions/esdiff/esdiff.js

@@ -0,0 +1 @@
+import './lib/esdiff.js';

components/mjs/source.js

@@ -48,6 +48,7 @@ export const source = {
   '[tex]/dsfont': `${src}/input/tex/extensions/dsfont/dsfont.js`,
   '[tex]/empheq': `${src}/input/tex/extensions/empheq/empheq.js`,
   '[tex]/enclose': `${src}/input/tex/extensions/enclose/enclose.js`,
+  '[tex]/esdiff': `${src}/input/tex/extensions/esdiff/esdiff.js`,
   '[tex]/extpfeil': `${src}/input/tex/extensions/extpfeil/extpfeil.js`,
   '[tex]/fontsizev3': `${src}/input/tex/extensions/fontsizev3/fontsizev3.js`,
   '[tex]/gensymb': `${src}/input/tex/extensions/gensymb/gensymb.js`,

testsuite/tests/input/tex/Esdiff.test.ts

@@ -0,0 +1,135 @@
+import { afterAll, beforeEach, describe, expect, test } from '@jest/globals';
+import { getTokens, setupTex, tex2mml, expectTexError } from '#helpers';
+import '#js/input/tex/esdiff/EsdiffConfiguration.js';
+
+beforeEach(() => setupTex(['base', 'esdiff']));
+
+/**********************************************************************************/
+
+describe('Esdiff', () => {
+  test('diff', () => {
+    expect(tex2mml('\\diff{f}{x}')).toMatchSnapshot();
+  });
+
+  test('diff order', () => {
+    expect(tex2mml('\\diff[n]{f}{x}')).toMatchSnapshot();
+  });
+
+  test('diff star', () => {
+    expect(tex2mml('\\diff*{f}{x}{x_0}')).toMatchSnapshot();
+  });
+
+  test('diff star order', () => {
+    expect(tex2mml('\\diff*[2]{g}{y}{0}')).toMatchSnapshot();
+  });
+
+  test('diff inline', () => {
+    expect(tex2mml('\\diff{f}{x}', false)).toMatchSnapshot();
+  });
+
+  test('diff script', () => {
+    expect(tex2mml('a^{\\diff{f}{x}}')).toMatchSnapshot();
+  });
+
+  test('diffp', () => {
+    expect(tex2mml('\\diffp{f}{x}')).toMatchSnapshot();
+  });
+
+  test('diffp order', () => {
+    expect(tex2mml('\\diffp[2]{f}{x}')).toMatchSnapshot();
+  });
+
+  test('diffp star', () => {
+    expect(tex2mml('\\diffp*{p}{V}{T}')).toMatchSnapshot();
+  });
+
+  test('diffp star order', () => {
+    expect(tex2mml('\\diffp*[2]{p}{V}{T}')).toMatchSnapshot();
+  });
+
+  test('diffp crossed', () => {
+    expect(tex2mml('\\diffp{f}{{x}{y^2}}')).toMatchSnapshot();
+  });
+
+  test('diffp crossed braced power', () => {
+    expect(tex2mml('\\diffp{f}{{x^2}}')).toMatchSnapshot();
+  });
+
+  test('diffp crossed star', () => {
+    expect(tex2mml('\\diffp*{f}{{x^2}{y^3}}{z}')).toMatchSnapshot();
+  });
+
+  test('diffp crossed macros', () => {
+    expect(tex2mml('\\diffp{\\phi}{\\alpha\\beta}')).toMatchSnapshot();
+  });
+
+  test('diffp crossed unbraced', () => {
+    expect(tex2mml('\\diffp{f}{xy}')).toMatchSnapshot();
+  });
+
+  test('diffp crossed large power', () => {
+    expect(tex2mml('\\diffp{f}{{x^{10}}{y^2}z}')).toMatchSnapshot();
+  });
+});
+
+/**********************************************************************************/
+
+describe('Esdiff errors', () => {
+  test('diffp non-numeric power', () => {
+    expectTexError('\\diffp{f}{{x^n}{y}}').toBe(
+      'Power of a variable for \\diffp must be a number, not n'
+    );
+  });
+
+  test('diffp empty power', () => {
+    expectTexError('\\diffp{f}{{x^{}}}').toBe(
+      'Power of a variable for \\diffp must be a number, not '
+    );
+  });
+
+  test('diffp dangling superscript', () => {
+    expectTexError('\\diffp{f}{x^}').toBe(
+      'Missing superscript or subscript argument'
+    );
+  });
+
+  test('diffp dangling superscript braced', () => {
+    expectTexError('\\diffp{f}{{x^}}').toBe(
+      'Missing superscript or subscript argument'
+    );
+  });
+
+  test('diffp dangling superscript spaces', () => {
+    expectTexError('\\diffp{f}{{x^ }}').toBe(
+      'Missing superscript or subscript argument'
+    );
+  });
+
+  test('diffp leading superscript', () => {
+    expectTexError('\\diffp{f}{^2}').toBe(
+      'Missing superscript or subscript argument'
+    );
+  });
+
+  test('diffp unbraced power', () => {
+    expectTexError('\\diffp{f}{x^2}').toBe(
+      'Missing superscript or subscript argument'
+    );
+  });
+
+  test('diffp dangling subscript', () => {
+    expectTexError('\\diffp{f}{x_}').toBe(
+      'Missing superscript or subscript argument'
+    );
+  });
+
+  test('diffp dangling subscript braced', () => {
+    expectTexError('\\diffp{f}{{x_}}').toBe(
+      'Missing superscript or subscript argument'
+    );
+  });
+});
+
+/**********************************************************************************/
+
+afterAll(() => getTokens('esdiff'));