A bunch of changes (mostly for calc config)

init.el

@@ -230,7 +230,7 @@ visual states."
     :predicate '((not magit-mode dired-mode
                       proced-mode mu4e-main-mode
                       mu4e-view-mode mu4e-headers-mode
-                      ibuffer-mode) t))
+                      ibuffer-mode calc-mode calc-trail-mode) t))
   (my/evil-avy-global-mode 1)
   :config
   (avy-setup-default))
@@ -524,7 +524,8 @@ visual states."
   :init
   (setq lsp-completion-provider :none
         lsp-headerline-breadcrumb-enable nil
-        lsp-inlay-hint-enable nil)
+        lsp-inlay-hint-enable nil
+        lsp-signature-doc-lines 1)
   (defun my/-setup-lsp-mode-buffer ()
     "Called by `lsp-mode-hook' to setup lsp-mode buffers."
     (evil-define-key '(normal visual motion) 'local
@@ -666,6 +667,64 @@ COMMAND and COMINT are like `compile'."
       (save-excursion (sly))))
   (setq inferior-lisp-program "/usr/bin/sbcl"))
 
+;; calc
+(use-package calc
+  :ensure nil
+  :bind (:map calc-mode-map
+         ("M-<tab>" . calc-roll-up)
+         ("M-TAB" . calc-roll-up))
+  :hook ((calc-mode calc-trail-mode) . my/setup-calc-calc-trail-mode)
+  :init
+  (defun my/setup-calc-calc-trail-mode ()
+    (setq-local doom-modeline-percent-position '()
+                truncate-partial-width-windows nil)
+    (visual-line-mode -1)
+    (display-line-numbers-mode -1)
+    (line-number-mode -1)
+    (column-number-mode -1)
+    (toggle-truncate-lines 1))
+  :config
+  (evil-define-key '(normal visual motion) calc-edit-mode-map
+    (kbd "RET") 'calc-edit-return
+    (kbd "<return>") 'calc-edit-return)
+  (defun my/-calc-float-mode-string ()
+    (cl-destructuring-bind (mode prec) calc-float-format
+      (concat
+       (upcase-initials (symbol-name mode))
+       (unless (zerop prec)
+         (concat ": " (number-to-string prec))))))
+  (doom-modeline-def-segment calc
+    "Display calculator icons and info.
+Take directly from doom-modeline."
+    (concat
+     (doom-modeline-spc)
+     (when-let ((icon (doom-modeline-icon 'faicon "nf-fa-calculator" "🖩" "")))
+       (concat
+        (doom-modeline-display-icon icon)
+        (doom-modeline-vspc)))
+     (doom-modeline--buffer-simple-name)
+     (when (eq major-mode 'calc-mode)
+       (concat
+        (doom-modeline-spc)
+        (number-to-string calc-internal-prec)
+        (doom-modeline-spc)
+        (upcase-initials (symbol-name calc-angle-mode))
+        (doom-modeline-spc)
+        (my/-calc-float-mode-string)
+        (when calc-prefer-frac
+          (concat
+           (doom-modeline-spc)
+           "Frac"))
+        (cond
+         (calc-algebraic-mode
+          (concat
+           (doom-modeline-spc)
+           "Alg"))
+         (calc-incomplete-algebraic-mode
+          (concat
+           (doom-modeline-spc)
+           "IAlg"))))))))
+
 ;; vterm
 (use-package vterm
   :hook (vterm-mode . with-editor-export-editor)