From 194c7f23f91d28782795da60fb01cd1fb4ccb76c Mon Sep 17 00:00:00 2001
From: "Davide P. Cervone" <dpvc@union.edu>
Date: Sat, 9 May 2020 07:50:20 -0400
Subject: [PATCH] Add compatibility so old package names (and options) will
 still work after the renaming.

---
 components/src/dependencies.js                   | 10 ++++++++++
 .../src/input/tex/extensions/amscd/amscd.js      |  3 +++
 .../src/input/tex/extensions/colorv2/colorv2.js  |  3 +++
 .../tex/extensions/configmacros/configmacros.js  |  3 +++
 components/src/input/tex/extensions/rename.js    | 16 ++++++++++++++++
 .../input/tex/extensions/tagformat/tagformat.js  |  3 +++
 components/src/startup/startup.js                |  3 ++-
 7 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 components/src/input/tex/extensions/rename.js

diff --git a/components/src/dependencies.js b/components/src/dependencies.js
index c198402d6..028d1f559 100644
--- a/components/src/dependencies.js
+++ b/components/src/dependencies.js
@@ -77,3 +77,13 @@ export const provides = {
   ],
   '[tex]/all-packages': allPackages
 };
+
+//
+//  Compatibility with v3.0 names for TeX extensions
+//
+export const compatibility = {
+  '[tex]/amsCd': '[tex]/amscd',
+  '[tex]/colorV2': '[tex]/colorv2',
+  '[tex]/configMacros': '[tex]/configmacros',
+  '[tex]/tagFormat': '[tex]/tagformat'
+};
diff --git a/components/src/input/tex/extensions/amscd/amscd.js b/components/src/input/tex/extensions/amscd/amscd.js
index 7518b2c86..da1ab0a95 100644
--- a/components/src/input/tex/extensions/amscd/amscd.js
+++ b/components/src/input/tex/extensions/amscd/amscd.js
@@ -1 +1,4 @@
 import './lib/amscd.js';
+import {rename} from '../../rename.js';
+
+rename('amsCd', 'amscd', true);
diff --git a/components/src/input/tex/extensions/colorv2/colorv2.js b/components/src/input/tex/extensions/colorv2/colorv2.js
index bbc7ad38d..51849b591 100644
--- a/components/src/input/tex/extensions/colorv2/colorv2.js
+++ b/components/src/input/tex/extensions/colorv2/colorv2.js
@@ -1 +1,4 @@
 import './lib/colorv2.js';
+import {rename} from '../rename.js';
+
+rename('colorV2', 'colorv2', false);
diff --git a/components/src/input/tex/extensions/configmacros/configmacros.js b/components/src/input/tex/extensions/configmacros/configmacros.js
index 0dd16952d..8645dfee9 100644
--- a/components/src/input/tex/extensions/configmacros/configmacros.js
+++ b/components/src/input/tex/extensions/configmacros/configmacros.js
@@ -1 +1,4 @@
 import './lib/configmacros.js';
+import {rename} from '../rename.js';
+
+rename('configMacros', 'configmacros', false);
diff --git a/components/src/input/tex/extensions/rename.js b/components/src/input/tex/extensions/rename.js
new file mode 100644
index 000000000..1a44098f1
--- /dev/null
+++ b/components/src/input/tex/extensions/rename.js
@@ -0,0 +1,16 @@
+//
+// Look for a package name in the package list and change it to a new name
+//   rhen rename tex options for it, if there are any.
+//
+export function rename(oname, nname, options) {
+  const tex = MathJax.config.tex;
+  if (tex && tex.packages) {
+    const packages = tex.packages;
+    const n = packages.indexOf(oname);
+    if (n >= 0) packages[n] = nname;
+    if (options && tex[oname]) {
+      tex[nname] = tex[oname];
+      delete tex[oname];
+    }
+  }
+}
diff --git a/components/src/input/tex/extensions/tagformat/tagformat.js b/components/src/input/tex/extensions/tagformat/tagformat.js
index 29b0da313..17ee5137a 100644
--- a/components/src/input/tex/extensions/tagformat/tagformat.js
+++ b/components/src/input/tex/extensions/tagformat/tagformat.js
@@ -1 +1,4 @@
 import './lib/tagformat.js';
+import {rename} from '../rename.js';
+
+rename('tagFormat', 'tagformat', true);
diff --git a/components/src/startup/startup.js b/components/src/startup/startup.js
index cbdf49642..7472aafb5 100644
--- a/components/src/startup/startup.js
+++ b/components/src/startup/startup.js
@@ -2,11 +2,12 @@ import './lib/startup.js';
 
 import {Loader, CONFIG} from '../../../js/components/loader.js';
 import {combineDefaults} from '../../../js/components/global.js';
-import {dependencies, paths, provides} from '../dependencies.js';
+import {dependencies, paths, provides, compatibility} from '../dependencies.js';
 
 combineDefaults(MathJax.config.loader, 'dependencies', dependencies);
 combineDefaults(MathJax.config.loader, 'paths', paths);
 combineDefaults(MathJax.config.loader, 'provides', provides);
+combineDefaults(MathJax.config.loader, 'source', compatibility);
 
 Loader.preLoad('loader');