Add support for pretty printing values in the inspector.

Author: r0man

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## master (unreleased)
 
+- Add support for pretty printing values in the inspector.
+
 ### New features
 
 - [#3802](https://github.com/clojure-emacs/cider/issues/3802): Inspector analytics.

cider-inspector.el

@@ -97,6 +97,11 @@ Can be turned to nil once the user sees and acknowledges the feature."
   :type 'boolean
   :package-version '(cider . "1.18.0"))
 
+(defcustom cider-inspector-pretty-print nil
+  "When true, pretty print values in the inspector."
+  :type 'boolean
+  :package-version '(cider . "1.18.0"))
+
 (defvar cider-inspector-uninteresting-regexp
   (concat "nil"                      ; nils are not interesting
           "\\|:" clojure--sym-regexp ; nor keywords
@@ -140,6 +145,7 @@ Can be turned to nil once the user sees and acknowledges the feature."
     (define-key map "n" #'cider-inspector-next-inspectable-object)
     (define-key map [(shift tab)] #'cider-inspector-previous-inspectable-object)
     (define-key map "p" #'cider-inspector-previous-inspectable-object)
+    (define-key map "P" #'cider-inspector-toggle-pretty-print)
     (define-key map ":" #'cider-inspect-expr-from-inspector)
     (define-key map "f" #'forward-char)
     (define-key map "b" #'backward-char)
@@ -349,6 +355,14 @@ MAX-NESTED-DEPTH is the new value."
     (when (nrepl-dict-get result "value")
       (cider-inspector--render-value result :next-inspectable))))
 
+(defun cider-inspector-toggle-pretty-print ()
+  "Toggle the pretty printing of values in the inspector."
+  (interactive)
+  (let ((pretty-print-p (not cider-inspector-pretty-print)))
+    (setq cider-inspector-pretty-print pretty-print-p)
+    (cider-inspector--refresh-with-opts "pretty-print" (if pretty-print-p "true" "false"))
+    (message "Pretty printing in the inspector %s." (if pretty-print-p "enabled" "disabled"))))
+
 (defun cider-inspector-toggle-view-mode ()
   "Toggle the view mode of the inspector between normal and object view mode."
   (interactive)
@@ -508,7 +522,9 @@ MAX-COLL-SIZE if non nil."
               ,@(when cider-inspector-max-nested-depth
                   `("max-nested-depth" ,cider-inspector-max-nested-depth))
               ,@(when cider-inspector-display-analytics-hint
-                  `("display-analytics-hint" "true"))))
+                  `("display-analytics-hint" "true"))
+              ,@(when cider-inspector-pretty-print
+                  `("pretty-print" "true"))))
     (cider-nrepl-send-sync-request (cider-current-repl))))
 
 (declare-function cider-set-buffer-ns "cider-mode")

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

@@ -81,6 +81,10 @@ You'll have access to additional keybindings in the inspector buffer
 | Switch the rendering of the current value between `:normal`, `:table`, and
   `:object` view modes. In `:table` mode, render the value as a table  (only supported for sequences of maps or tuples). In `:object` mode, any value is rendered as a plain Java object (by displaying its fields) instead of custom rendering rules that the Inspector applies in `:normal` mode.
 
+| kbd:[P]
+| `cider-inspector-toggle-pretty-print`
+| Toggle the pretty printing of values in the inspector.
+
 | kbd:[d]
 | `cider-inspector-def-current-val`
 | Defines a var in the REPL namespace with current inspector value. If you tend to always choose the same name(s), you may want to set the `cider-inspector-preferred-var-names` customization option.