bug#47603: comint sets '(rear-nonsticky t) on entire prompt, disabling 'cursor-intangible

[Stefan Monnier]

> Comint sets ‘(rear-nonsticky t) on the entire detected prompt text, which
> prevents `cursor-intangible from functioning correctly when applied to the
> prompt.  As Stefan put it:

I fixed it a while back but forgot the `font-lock-face` property in the
list of properties to add to `rear-nonstick` so I just added the
patch below to `master`.
I believe this should now do it.


        Stefan


diff --git a/lisp/comint.el b/lisp/comint.el
index 2745c5a26f..b90e6354d8 100644
--- a/lisp/comint.el
+++ b/lisp/comint.el
@@ -1797,6 +1797,9 @@ comint-add-to-input-history
                        (min size (- comint-input-ring-size size)))))
     (ring-insert comint-input-ring cmd)))
 
+(defconst comint--prompt-rear-nonsticky
+  '(field inhibit-line-move-field-capture read-only font-lock-face))
+
 (defun comint-send-input (&optional no-newline artificial)
   "Send input to process.
 After the process output mark, sends all text from the process mark to
@@ -1916,8 +1919,8 @@ comint-send-input
             (unless (or no-newline comint-use-prompt-regexp)
               ;; Cover the terminating newline
               (add-text-properties end (1+ end)
-                                   '(rear-nonsticky
-                                     (field inhibit-line-move-field-capture 
read-only)
+                                   `(rear-nonsticky
+                                     ,comint--prompt-rear-nonsticky
                                      field boundary
                                      inhibit-line-move-field-capture t)))))
 
@@ -2124,10 +2127,10 @@ comint-output-filter
            (unless comint-use-prompt-regexp
               (with-silent-modifications
                 (add-text-properties comint-last-output-start (point)
-                                     '(front-sticky
+                                     `(rear-nonsticky
+                                      ,comint--prompt-rear-nonsticky
+                                      front-sticky
                                       (field inhibit-line-move-field-capture)
-                                      rear-nonsticky
-                                      (field inhibit-line-move-field-capture 
read-only)
                                       field output
                                       inhibit-line-move-field-capture t))))
 
@@ -2157,8 +2160,8 @@ comint-output-filter
                                               'font-lock-face
                                               'comint-highlight-prompt)
              (add-text-properties prompt-start (point)
-                                  '(rear-nonsticky
-                                    (field inhibit-line-move-field-capture 
read-only))))
+                                  `(rear-nonsticky
+                                    ,comint--prompt-rear-nonsticky)))
            (goto-char saved-point)))))))
 
 (defun comint-preinput-scroll-to-bottom ()