emacs: Use 'when' instead of 'if' when there is no ELSE part

[notmuch] / emacs / notmuch-hello.el

diff --git a/emacs/notmuch-hello.el b/emacs/notmuch-hello.el
index 89e03c366fc8c02ae4b85e5cb4ac2e605663c1bb..c17b46bc3ea2cbc5bfee680f62e2589da71a0a20 100644 (file)
--- a/emacs/notmuch-hello.el
+++ b/emacs/notmuch-hello.el
@@ -589,8 +589,8 @@ with `notmuch-hello-query-counts'."
     (mapc (lambda (elem)
            ;; (not elem) indicates an empty slot in the matrix.
            (when elem
-             (if (> column-indent 0)
-                 (widget-insert (make-string column-indent ? )))
+             (when (> column-indent 0)
+               (widget-insert (make-string column-indent ? )))
              (let* ((name (plist-get elem :name))
                     (query (plist-get elem :query))
                     (oldest-first (cl-case (plist-get elem :sort-order)
@@ -638,7 +638,7 @@ with `notmuch-hello-query-counts'."
     (dolist (window (window-list))
       (let ((last-buf (window-parameter window 'notmuch-hello-last-buffer))
            (cur-buf (window-buffer window)))
-       (when (not (eq last-buf cur-buf))
+       (unless (eq last-buf cur-buf)
          ;; This window changed or is new.  Update recorded buffer
          ;; for next time.
          (set-window-parameter window 'notmuch-hello-last-buffer cur-buf)
@@ -652,7 +652,7 @@ with `notmuch-hello-query-counts'."
       ;; 24, we can't do it right here because something in this
       ;; hook's call stack overrides hello's point placement.
       (run-at-time nil nil #'notmuch-hello t))
-    (when (null hello-buf)
+    (unless hello-buf
       ;; Clean up hook
       (remove-hook 'window-configuration-change-hook
                   #'notmuch-hello-window-configuration-change))))
@@ -890,8 +890,8 @@ Supports the following entries in OPTIONS as a plist:
    the same values as :filter. If :filter and :filter-count are specified, this
    will be used instead of :filter, not in conjunction with it."
   (widget-insert title ": ")
-  (if (and notmuch-hello-first-run (plist-get options :initially-hidden))
-      (add-to-list 'notmuch-hello-hidden-sections title))
+  (when (and notmuch-hello-first-run (plist-get options :initially-hidden))
+    (add-to-list 'notmuch-hello-hidden-sections title))
   (let ((is-hidden (member title notmuch-hello-hidden-sections))
        (start (point)))
     (if is-hidden
@@ -908,7 +908,7 @@ Supports the following entries in OPTIONS as a plist:
                                (notmuch-hello-update))
                     "hide"))
     (widget-insert "\n")
-    (when (not is-hidden)
+    (unless is-hidden
       (let ((searches (apply 'notmuch-hello-query-counts query-list options)))
        (when (or (not (plist-get options :hide-if-empty))
                  searches)