From 5b95a1fe339e66b2ced14dad0da09ff3df73d034 Mon Sep 17 00:00:00 2001
From: Justin Barclay <git@justinbarclay.ca>
Date: Sat, 13 Apr 2024 23:39:20 -0700
Subject: [PATCH] Fix potential recursive parinfer-rust-mode call

---
 parinfer-rust-helper.el |  2 +-
 parinfer-rust-mode.el   | 60 ++++++++++++++++++++++-------------------
 test/test-helper.el     |  3 +--
 3 files changed, 34 insertions(+), 31 deletions(-)

diff --git a/parinfer-rust-helper.el b/parinfer-rust-helper.el
index 711b8f1..8db5f9b 100644
--- a/parinfer-rust-helper.el
+++ b/parinfer-rust-helper.el
@@ -240,7 +240,7 @@ mode to better emulate users."
   (when (eq (current-buffer)
             (window-buffer (selected-window)))
     (remove-hook 'window-selection-change-functions #'parinfer-rust--defer-loading t)
-    (parinfer-rust-mode)))
+    (parinfer-rust-mode-enable)))
 ;; Disable fill column warning only for this buffer to enable long strings of text without
 ;; having to do a weird mapconcat.
 ;; Local Variables:
diff --git a/parinfer-rust-mode.el b/parinfer-rust-mode.el
index ea107a7..ee5db74 100644
--- a/parinfer-rust-mode.el
+++ b/parinfer-rust-mode.el
@@ -503,7 +503,7 @@ Checks if MODE is a valid Parinfer mode, and uses
   (parinfer-rust--set-default-state)
   (parinfer-rust--dim-parens))
 
-(defun parinfer-rust-mode-enable ()
+(defun parinfer-rust-mode-setup ()
   "Enable Parinfer."
   (setq-local parinfer-rust-enabled t)
   (parinfer-rust--detect-troublesome-modes)
@@ -535,6 +535,35 @@ This includes stopping tracking of all changes."
       (setq-local parinfer-rust--disable nil)
     (setq-local parinfer-rust--disable t)))
 
+(defun parinfer-rust-mode-enable ()
+  "Enable Parinfer."
+  ;; Make sure the library is installed at the appropriate location or offer to download it
+     (when (parinfer-rust--check-for-library parinfer-rust-supported-versions
+                                             parinfer-rust-library
+                                             parinfer-rust--lib-name
+                                             parinfer-rust-auto-download)
+       (require 'parinfer-rust parinfer-rust-library t))
+     ;; Check version and prompt to download latest version if out of date Problem: Emacs can't
+     ;; reload dynamic libraries, which means that if we download a new library the user has to
+     ;; restart Emacs for changes to take effect.
+     (parinfer-rust--check-version parinfer-rust-supported-versions
+                                   (parinfer-rust-version)
+                                   parinfer-rust-library
+                                   parinfer-rust--lib-name)
+     (parinfer-rust-mode-setup)
+     (cond ((or (eq 'defer parinfer-rust-check-before-enable)
+                buffer-read-only)
+            ;; Defer checking for changes until a user changes the buffer
+            (setq-local parinfer-rust--disable t)
+            (add-hook 'before-change-functions #'parinfer-rust--check-for-issues t t))
+
+           ((eq 'immediate parinfer-rust-check-before-enable)
+            (setq-local parinfer-rust--disable t)
+            (parinfer-rust--check-for-issues))
+
+           (t (let ((parinfer-rust--mode "paren"))
+                (parinfer-rust--execute)))))
+
 ;;;###autoload
 (defun parinfer-rust-switch-mode ()
   "Switch to a different Parinfer mode.
@@ -572,37 +601,12 @@ not available."
   (cond
    (parinfer-rust-enabled
     (parinfer-rust-mode-disable))
+   ;; Don't do anything if the buffer is not selected
    ((not (eq (current-buffer)
              (window-buffer (selected-window))))
     (add-hook 'window-selection-change-functions #'parinfer-rust--defer-loading nil t))
    (t
-    (progn
-     ;; Make sure the library is installed at the appropriate location or offer to download it
-     (when (parinfer-rust--check-for-library parinfer-rust-supported-versions
-                                             parinfer-rust-library
-                                             parinfer-rust--lib-name
-                                             parinfer-rust-auto-download)
-       (require 'parinfer-rust parinfer-rust-library t))
-     ;; Check version and prompt to download latest version if out of date Problem: Emacs can't
-     ;; reload dynamic libraries, which means that if we download a new library the user has to
-     ;; restart Emacs for changes to take effect.
-     (parinfer-rust--check-version parinfer-rust-supported-versions
-                                   (parinfer-rust-version)
-                                   parinfer-rust-library
-                                   parinfer-rust--lib-name)
-     (parinfer-rust-mode-enable)
-     (cond ((or (eq 'defer parinfer-rust-check-before-enable)
-                buffer-read-only)
-            ;; Defer checking for changes until a user changes the buffer
-            (setq-local parinfer-rust--disable t)
-            (add-hook 'before-change-functions #'parinfer-rust--check-for-issues t t))
-
-           ((eq 'immediate parinfer-rust-check-before-enable)
-            (setq-local parinfer-rust--disable t)
-            (parinfer-rust--check-for-issues))
-
-           (t (let ((parinfer-rust--mode "paren"))
-                (parinfer-rust--execute))))))))
+    (parinfer-rust-mode-enable))))
 
 (provide 'parinfer-rust-mode)
 ;;; parinfer-rust-mode.el ends here
diff --git a/test/test-helper.el b/test/test-helper.el
index 708d6d2..446b41d 100644
--- a/test/test-helper.el
+++ b/test/test-helper.el
@@ -143,10 +143,9 @@ it makes no sense to convert it to a string using
                                     parinfer-rust-library
                                     parinfer-rust--lib-name)
       (indent-tabs-mode 0)
-      (parinfer-rust-mode-enable)
       ;; Disable checks for deferral and do not run --execute on initialization
       ;; this breaks a lot of test because they expect the buffer to be in a specific state
-      )))
+      (parinfer-rust-mode-setup))))
 
 (defun simulate-parinfer-in-another-buffer--without-changes (test-string mode)
   "Run parinfer on buffer using text and cursor position