master 3979f83cd60 7/7: Inhibit slash commands in erc--input-review-functions

[F. Jason Park]

branch: master
commit 3979f83cd60f2d0168690883423b63ae434da929
Author: F. Jason Park <jp@neverwas.me>
Commit: F. Jason Park <jp@neverwas.me>

    Inhibit slash commands in erc--input-review-functions
    
    * lisp/erc/erc.el (erc--input-review-functions): Add new review
    function `erc--inhibit-slash-cmd-insertion'.
    (erc--check-prompt-input-functions): Move
    `erc--check-prompt-input-for-multiline-command' above
    `erc--check-prompt-input-for-multiline-blanks'.
    (erc--inhibit-slash-cmd-insertion): New "review" function to suppress
    insertion of prompt input for slash commands.  Doesn't affect "meta"
    slash commands like /SAY.
    (erc--send-input-lines): Don't bother checking whether message is a
    command.  Instead, trust verdict handed down by message-prep and
    review functions.  This opens the door to optional insertion for
    debugging purposes or when echoing command lines in a shell-like
    fashion.
    * test/lisp/erc/erc-tests.el (erc-send-whitespace-lines): clean up
    portion dealing with trimming slash commands.  (Bug#66073)
---
 lisp/erc/erc.el            | 17 +++++++++++------
 test/lisp/erc/erc-tests.el |  9 ++-------
 2 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/lisp/erc/erc.el b/lisp/erc/erc.el
index 37502b4c743..fb236f1f189 100644
--- a/lisp/erc/erc.el
+++ b/lisp/erc/erc.el
@@ -1104,7 +1104,8 @@ subprotocols should probably be handled manually."
   'erc--input-review-functions "30.1")
 (defvar erc--input-review-functions '(erc--split-lines
                                       erc--run-input-validation-checks
-                                      erc--discard-trailing-multiline-nulls)
+                                      erc--discard-trailing-multiline-nulls
+                                      erc--inhibit-slash-cmd-insertion)
   "Special hook for reviewing and modifying prompt input.
 ERC runs this before clearing the prompt and before running any
 send-related hooks, such as `erc-pre-send-functions'.  Thus, it's
@@ -6543,10 +6544,10 @@ a separate message."
 (defvar erc--check-prompt-input-functions
   '(erc--check-prompt-input-for-point-in-bounds
     erc--check-prompt-input-for-something
+    erc--check-prompt-input-for-multiline-command
     erc--check-prompt-input-for-multiline-blanks
     erc--check-prompt-input-for-running-process
-    erc--check-prompt-input-for-excess-lines
-    erc--check-prompt-input-for-multiline-command)
+    erc--check-prompt-input-for-excess-lines)
   "Validators for user input typed at prompt.
 Called with two arguments: the current input submitted by the
 user, as a string, along with the same input as a list of
@@ -6571,6 +6572,11 @@ ERC prints them as a single message joined by newlines.")
            (message "%s" (string-join (nreverse erc--check-prompt-explanation)
                                       "\n"))))))
 
+(defun erc--inhibit-slash-cmd-insertion (state)
+  "Don't insert STATE object's message if it's a \"slash\" command."
+  (when (erc--input-split-cmdp state)
+    (setf (erc--input-split-insertp state) nil)))
+
 (defun erc-send-current-line ()
   "Parse current line and send it to IRC."
   (interactive)
@@ -6679,9 +6685,8 @@ queue.  Expect LINES-OBJ to be an `erc--input-split' 
object."
   "Send lines in `erc--input-split-lines' object LINES-OBJ."
   (when (erc--input-split-sendp lines-obj)
     (dolist (line (erc--input-split-lines lines-obj))
-      (unless (erc--input-split-cmdp lines-obj)
-        (when (erc--input-split-insertp lines-obj)
-          (erc-display-msg line)))
+      (when (erc--input-split-insertp lines-obj)
+        (erc-display-msg line))
       (erc-process-input-line (concat line "\n")
                               (null erc-flood-protect)
                               (not (erc--input-split-cmdp lines-obj))))))
diff --git a/test/lisp/erc/erc-tests.el b/test/lisp/erc/erc-tests.el
index 2da1f7b29c1..8a68eca6196 100644
--- a/test/lisp/erc/erc-tests.el
+++ b/test/lisp/erc/erc-tests.el
@@ -1316,17 +1316,12 @@
        (should-not (funcall next)))
 
      (ert-info ("Multiline command with trailing blank filtered")
-       (pcase-dolist (`(,p . ,q)
-                      '(("/a b\r" "/a b\n") ("/a b\n" "/a b\n")
-                        ("/a b\n\n" "/a b\n") ("/a b\r\n" "/a b\n")
-                        ("/a b\n\n\n" "/a b\n")))
+       (dolist (p '("/a b" "/a b\n" "/a b\n\n" "/a b\n\n\n"))
          (insert p)
          (erc-send-current-line)
          (erc-bol)
          (should (eq (point) (point-max)))
-         (while q
-           (should (pcase (funcall next)
-                     (`(,cmd ,_ nil) (equal cmd (pop q))))))
+         (should (pcase (funcall next) (`(,cmd ,_ nil) (equal cmd "/a b\n"))))
          (should-not (funcall next))))
 
      (ert-info ("Multiline command with non-blanks errors")