cider-eval: Introduce new cider-auto-inspect-after-eval-select-window defcustom

It allows one to have the `*cider-inspect*` buffer rendered without switching to it.

Author: vemv

CHANGELOG.md

@@ -13,6 +13,8 @@
 
 ### Changes
 
+- `cider-eval`: Introduce new `cider-auto-inspect-after-eval-select-window` defcustom.
+  - It allows one to have the `*cider-inspect*` buffer rendered without switching to it.
 - [#3626](https://github.com/clojure-emacs/cider/issues/3626): `cider-ns-refresh`: jump to the relevant file/line on errors.
 - [#3628](https://github.com/clojure-emacs/cider/issues/3628): `cider-ns-refresh`: summarize errors as an overlay.
 - Bump the injected nREPL to [1.1.1](https://github.com/nrepl/nrepl/blob/v1.1.1/CHANGELOG.md#111-2024-02-20).

cider-eval.el

@@ -993,17 +993,18 @@ when `cider-auto-inspect-after-eval' is non-nil."
                                                                       ;; and needs no jumping:
                                                                       phase)))
                                  ;; done handler:
-                                 (lambda (buffer)
+                                 (lambda (_buffer)
                                    (if beg
                                        (unless fringed
                                          (cider--make-fringe-overlays-for-region beg end)
                                          (setq fringed t))
                                      (cider--make-fringe-overlay end))
                                    (when (and cider-auto-inspect-after-eval
                                               (boundp 'cider-inspector-buffer)
-                                              (windowp (get-buffer-window cider-inspector-buffer 'visible)))
+                                              (windowp (cider--get-inspector-window)))
                                      (cider-inspect-last-result)
-                                     (select-window (get-buffer-window buffer)))
+                                     (when cider-auto-inspect-after-eval-select-window
+                                       (select-window (cider--get-inspector-window))))
                                    (when cider-eval-register
                                      (set-register cider-eval-register res))))))
 

cider-inspector.el

@@ -31,13 +31,12 @@
 (require 'easymenu)
 (require 'seq)
 (require 'cider-eval)
+(require 'cider-util)
 
 ;; ===================================
 ;; Inspector Key Map and Derived Mode
 ;; ===================================
 
-(defconst cider-inspector-buffer "*cider-inspect*")
-
 ;;; Customization
 (defgroup cider-inspector nil
   "Presentation and behavior of the CIDER value inspector."

cider-util.el

@@ -826,6 +826,30 @@ KIND can be the symbols `ns', `var', `emph', `fn', or a face name."
              (t x)))
           menu-list))
 
+;; Defined here to avoid circular dependencies
+(defconst cider-inspector-buffer "*cider-inspect*")
+
+(defcustom cider-auto-inspect-after-eval-select-window t
+  "When t (and `cider-auto-inspect-after-eval' is also t),
+the inspector window will be selected after eval.
+
+When nil, while the underlying *cider-inspect* buffer will be re-rendered,
+its window won't be selected.
+
+You may want the nil value if you like having *cider-inspect* in a background frame."
+  :type 'boolean
+  :group 'cider
+  :package-version '(cider . "1.14.0"))
+
+(defun cider--get-inspector-window ()
+  "Returns a window showing the *cider-inspect* buffer,
+honoring the `cider-auto-inspect-after-eval-select-window' preference.
+
+May return nil."
+  (get-buffer-window cider-inspector-buffer (if cider-auto-inspect-after-eval-select-window
+                                                'visible
+                                              t)))
+
 (provide 'cider-util)
 
 ;;; cider-util.el ends here

doc/modules/ROOT/pages/debugging/inspector.adoc

@@ -17,7 +17,8 @@ Alternatively, after a regular eval command, you can inspect the last
 evaluated value using `cider-inspect-last-result`. When an inspector
 buffer is visible in the background, it is automatically updated with
 the last result. This behavior can be controlled with the variable
-`cider-auto-inspect-after-eval`.
+`cider-auto-inspect-after-eval` (and `cider-auto-inspect-after-eval-select-window`,
+`cider-inspector-auto-select-buffer` for even more fine-grained control over the UX).
 
 TIP: The inspector can also be invoked in the middle of a debugging
 session, see xref:debugging/debugger.adoc[here] for more details.