Restore isearch correctly after M-e in special modes (bug#30187)

* lisp/isearch.el (isearch-suspended): New defvar.
(with-isearch-suspended): Set isearch-suspended to t
at the beginning, then set it back to nil at the end.

* lisp/comint.el (comint-history-isearch-backward)
(comint-history-isearch-backward-regexp): Set global value of
comint-history-isearch to t.
(comint-history-isearch-end): Reevaluate
comint-history-isearch when isearch-edit-string finishes.

* lisp/dired-aux.el (dired-isearch-filenames)
(dired-isearch-filenames-regexp): Set global value of
dired-isearch-filenames to t.
(dired-isearch-filenames-end): Reevaluate
dired-isearch-filenames when isearch-edit-string finishes.

lisp/comint.el

@@ -1434,14 +1434,14 @@ If nil, Isearch operates on the whole comint buffer."
 (defun comint-history-isearch-backward ()
   "Search for a string backward in input history using Isearch."
   (interactive)
-  (let ((comint-history-isearch t))
-    (isearch-backward nil t)))
+  (setq comint-history-isearch t)
+  (isearch-backward nil t))
 
 (defun comint-history-isearch-backward-regexp ()
   "Search for a regular expression backward in input history using Isearch."
   (interactive)
-  (let ((comint-history-isearch t))
-    (isearch-backward-regexp nil t)))
+  (setq comint-history-isearch t)
+  (isearch-backward-regexp nil t))
 
 (defvar-local comint-history-isearch-message-overlay nil)
 
@@ -1472,7 +1472,9 @@ Intended to be added to `isearch-mode-hook' in `comint-mode'."
   (setq isearch-message-function nil)
   (setq isearch-wrap-function nil)
   (setq isearch-push-state-function nil)
-  (remove-hook 'isearch-mode-end-hook 'comint-history-isearch-end t))
+  (remove-hook 'isearch-mode-end-hook 'comint-history-isearch-end t)
+  (unless isearch-suspended
+    (custom-reevaluate-setting 'comint-history-isearch)))
 
 (defun comint-goto-input (pos)
   "Put input history item of the absolute history position POS."

lisp/dired-aux.el

@@ -2766,7 +2766,9 @@ Intended to be added to `isearch-mode-hook'."
   "Clean up the Dired file name search after terminating isearch."
   (define-key isearch-mode-map "\M-sff" nil)
   (dired-isearch-filenames-mode -1)
-  (remove-hook 'isearch-mode-end-hook 'dired-isearch-filenames-end t))
+  (remove-hook 'isearch-mode-end-hook 'dired-isearch-filenames-end t)
+  (unless isearch-suspended
+    (custom-reevaluate-setting 'dired-isearch-filenames)))
 
 (defun dired-isearch-filter-filenames (beg end)
   "Test whether some part of the current search match is inside a file name.
@@ -2779,15 +2781,15 @@ is part of a file name (i.e., has the text property `dired-filename')."
 (defun dired-isearch-filenames ()
   "Search for a string using Isearch only in file names in the Dired buffer."
   (interactive)
-  (let ((dired-isearch-filenames t))
-    (isearch-forward nil t)))
+  (setq dired-isearch-filenames t)
+  (isearch-forward nil t))
 
 ;;;###autoload
 (defun dired-isearch-filenames-regexp ()
   "Search for a regexp using Isearch only in file names in the Dired buffer."
   (interactive)
-  (let ((dired-isearch-filenames t))
-    (isearch-forward-regexp nil t)))
+  (setq dired-isearch-filenames t)
+  (isearch-forward-regexp nil t))
 
 
 ;; Functions for searching in tags style among marked files.

lisp/isearch.el

@@ -1233,6 +1233,8 @@ If this is set inside code wrapped by the macro
 (define-obsolete-variable-alias 'isearch-new-word
   'isearch-new-regexp-function "25.1")
 
+(defvar isearch-suspended nil)
+
 (defmacro with-isearch-suspended (&rest body)
   "Exit Isearch mode, run BODY, and reinvoke the pending search.
 You can update the global isearch variables by setting new values to
@@ -1299,6 +1301,8 @@ You can update the global isearch variables by setting new values to
 	       isearch-original-minibuffer-message-timeout)
 	      old-point old-other-end)
 
+          (setq isearch-suspended t)
+
 	  ;; Actually terminate isearching until editing is done.
 	  ;; This is so that the user can do anything without failure,
 	  ;; like switch buffers and start another isearch, and return.
@@ -1313,6 +1317,8 @@ You can update the global isearch variables by setting new values to
 	  (unwind-protect
 	      (progn ,@body)
 
+            (setq isearch-suspended nil)
+
 	    ;; Always resume isearching by restarting it.
 	    (isearch-mode isearch-forward
 			  isearch-regexp
@@ -1374,6 +1380,7 @@ You can update the global isearch variables by setting new values to
 		  (message "")))))
 
     (quit  ; handle abort-recursive-edit
+     (setq isearch-suspended nil)
      (isearch-abort)  ;; outside of let to restore outside global values
      )))