Revert "Account for leading timestamps in erc-match"

This reverts commit 99d74dcd45938e2686d93eb5649800e14a88cd84 but keeps
the test file test/lisp/erc/erc-scenarios-match.el.  It also
implements a partial alternative solution by undoing the reordering of
insert hooks owned by the `stamp' and `match' modules.  The initial
reordering stems from d880a08f "Cement ordering of essential hook
members in ERC" and was intended to address the problem of timestamps
not being hidden in matched "fool" messages.  However, a more
comprehensive solution is being pursued as part of bug#64301.  The
following changes differ from those in a pure revert.

* erc/ERC-NEWS: Fix erroneous claim about relative hook ordering
pre-5.6.
* lisp/erc/erc-match.el (erc-match-mode, erc-match-enable): Lower hook
depth of `erc-match-message' in `erc-insert-modify-hook' from 60 to
50.
(erc-text-matched-hook): Retain cleaned-up portion of revised doc
string instead of reverting completely.
* lisp/erc/erc-stamp.el (erc-stamp-mode, erc-stamp-enable): Raise
depth of `erc-add-timestamp' in `erc-insert-modify-hook' and
`erc-send-modify-hook' from 50 to 60.
* test/lisp/erc/erc-scenarios-match.el
(erc-scenarios-match--stamp-left-current-nick
erc-scenarios-match--stamp-left-fools-invisible): Temporarily disable
the latter and fix expected hook ordering.
* test/lisp/erc/erc-tests.el (erc--essential-hook-ordering): Fix
expected order of default insert hooks.  (Bug#60936)

5 files changed, 22 insertions, 35 deletions

diff --git a/etc/ERC-NEWS b/etc/ERC-NEWS
index 2f465e247d7..5665b760ea9 100644
--- a/etc/ERC-NEWS
+++ b/etc/ERC-NEWS
@@ -183,7 +183,7 @@ Luckily, ERC now leverages a feature introduced in Emacs 27, "hook
 depth," to secure the positions of a few key members of
 'erc-insert-modify-hook' and 'erc-send-modify-hook'.  So far, this
 includes the functions 'erc-button-add-buttons', 'erc-fill',
-'erc-add-timestamp', and 'erc-match-message', which now appear in that
+'erc-match-message', and 'erc-add-timestamp', which now appear in that
 order, when present, at depths beginning at 20 and ending below 80.
 Of most interest to module authors is the new relative positioning of
 the first two, 'erc-button-add-buttons' and 'erc-fill', which have
diff --git a/lisp/erc/erc-match.el b/lisp/erc/erc-match.el
index 204bf14a1cf..2b7fff87ff0 100644
--- a/lisp/erc/erc-match.el
+++ b/lisp/erc/erc-match.el
@@ -52,7 +52,7 @@ they are hidden or highlighted.  This is controlled via the variables
 `erc-current-nick-highlight-type'.  For all these highlighting types,
 you can decide whether the entire message or only the sending nick is
 highlighted."
-  ((add-hook 'erc-insert-modify-hook #'erc-match-message 60)
+  ((add-hook 'erc-insert-modify-hook #'erc-match-message 50)
    (add-hook 'erc-mode-hook #'erc-match--modify-invisibility-spec)
    (unless erc--updating-modules-p
      (erc-buffer-do #'erc-match--modify-invisibility-spec))
@@ -237,10 +237,7 @@ for beeping to work."
 ERC calls members with the arguments (MATCH-TYPE NUH MESSAGE),
 where MATCH-TYPE is one of the symbols `current-nick', `keyword',
 `pal', `dangerous-host', `fool', and NUH is an `erc-response'
-sender, like bob!~bob@example.org.  Users should keep in mind
-that MESSAGE may not include decorations, such as white space or
-time stamps, preceding the same text as inserted in the narrowed
-buffer."
+sender, like bob!~bob@example.org."
   :options '(erc-log-matches erc-hide-fools erc-beep-on-match)
   :type 'hook)
 
@@ -462,19 +459,8 @@ In any of the following situations, MSG is directed at an entry FOOL:
 	(erc-list-match fools-end msg))))
 
 (defun erc-match-message ()
-  "Add faces to matching text in inserted message."
-  ;; Exclude leading whitespace, stamps, etc.
-  (let ((omin (point-min))
-        (beg (or (and (not (get-text-property (point-min) 'erc-command))
-                      (next-single-property-change (point-min) 'erc-command))
-                 (point-min))))
-    ;; FIXME when ERC no longer supports 28, use `with-restriction'
-    ;; with `:label' here instead of passing `omin'.
-    (save-restriction
-      (narrow-to-region beg (point-max))
-      (erc-match--message omin))))
-
-(defun erc-match--message (unrestricted-point-min)
+  "Mark certain keywords in a region.
+Use this defun with `erc-insert-modify-hook'."
   ;; This needs some refactoring.
   (goto-char (point-min))
   (let* ((to-match-nick-dep '("pal" "fool" "dangerous-host"))
@@ -576,14 +562,12 @@ In any of the following situations, MSG is directed at an entry FOOL:
 					'font-lock-face match-face)))
 	      ;; Else twiddle your thumbs.
 	      (t nil))
-             ;; FIXME use `without-restriction' after dropping 28.
-             (save-restriction
-               (narrow-to-region unrestricted-point-min (point-max))
-               (run-hook-with-args
-                'erc-text-matched-hook (intern match-type)
-                (or nickuserhost
-                    (concat "Server:" (erc-get-parsed-vector-type vector)))
-                message)))))
+	     (run-hook-with-args
+	      'erc-text-matched-hook
+	      (intern match-type)
+	      (or nickuserhost
+		  (concat "Server:" (erc-get-parsed-vector-type vector)))
+	      message))))
        (if nickuserhost
 	   (append to-match-nick-dep to-match-nick-indep)
 	 to-match-nick-indep)))))
diff --git a/lisp/erc/erc-stamp.el b/lisp/erc/erc-stamp.el
index aac51135a07..5035e60a87d 100644
--- a/lisp/erc/erc-stamp.el
+++ b/lisp/erc/erc-stamp.el
@@ -163,8 +163,8 @@ from entering them and instead jump over them."
 (define-erc-module stamp timestamp
   "This mode timestamps messages in the channel buffers."
   ((add-hook 'erc-mode-hook #'erc-munge-invisibility-spec)
-   (add-hook 'erc-insert-modify-hook #'erc-add-timestamp 50)
-   (add-hook 'erc-send-modify-hook #'erc-add-timestamp 50)
+   (add-hook 'erc-insert-modify-hook #'erc-add-timestamp 60)
+   (add-hook 'erc-send-modify-hook #'erc-add-timestamp 60)
    (add-hook 'erc-mode-hook #'erc-stamp--recover-on-reconnect)
    (add-hook 'erc--pre-clear-functions #'erc-stamp--reset-on-clear)
    (unless erc--updating-modules-p
diff --git a/test/lisp/erc/erc-scenarios-match.el b/test/lisp/erc/erc-scenarios-match.el
index 49e6a3370fc..782907bfc30 100644
--- a/test/lisp/erc/erc-scenarios-match.el
+++ b/test/lisp/erc/erc-scenarios-match.el
@@ -49,8 +49,9 @@
                                 :port port
                                 :full-name "tester"
                                 :nick "tester")
-        (should (memq 'erc-match-message
-                      (memq 'erc-add-timestamp erc-insert-modify-hook)))
+        ;; Module `timestamp' follows `match' in insertion hooks.
+        (should (memq 'erc-add-timestamp
+                      (memq 'erc-match-message erc-insert-modify-hook)))
         ;; The "match type" is `current-nick'.
         (funcall expect 5 "tester")
         (should (eq (get-text-property (1- (point)) 'font-lock-face)
@@ -60,6 +61,7 @@
 ;; some non-nil invisibility property spans the entire message.
 (ert-deftest erc-scenarios-match--stamp-left-fools-invisible ()
   :tags '(:expensive-test)
+  (ert-skip "WIP: fix included in bug#64301")
   (erc-scenarios-common-with-cleanup
       ((erc-scenarios-common-dialog "join/legacy")
        (dumb-server (erc-d-run "localhost" t 'foonet))
@@ -84,8 +86,9 @@
                                 :full-name "tester"
                                 :password "changeme"
                                 :nick "tester")
-        (should (memq 'erc-match-message
-                      (memq 'erc-add-timestamp erc-insert-modify-hook)))
+        ;; Module `timestamp' follows `match' in insertion hooks.
+        (should (memq 'erc-add-timestamp
+                      (memq 'erc-match-message erc-insert-modify-hook)))
         (funcall expect 5 "This server is in debug mode")))
 
     (ert-info ("Ensure lines featuring \"bob\" are invisible")
diff --git a/test/lisp/erc/erc-tests.el b/test/lisp/erc/erc-tests.el
index b751ef50520..80c7c708fc5 100644
--- a/test/lisp/erc/erc-tests.el
+++ b/test/lisp/erc/erc-tests.el
@@ -1851,8 +1851,8 @@
    '( :erc-insert-modify-hook (erc-controls-highlight ; 0
                                erc-button-add-buttons ; 30
                                erc-fill ; 40
-                               erc-add-timestamp ; 50
-                               erc-match-message) ; 60
+                               erc-match-message ; 50
+                               erc-add-timestamp) ; 60
 
       :erc-send-modify-hook ( erc-controls-highlight ; 0
                               erc-button-add-buttons ; 30