completion: use corfu instead of company

init.org

@@ -319,6 +319,18 @@ Font size [[https://www.gnu.org/software/emacs/manual/html_node/elisp/Face-Attri
 #+end_src
 
 #+begin_src emacs-lisp
+(defun apply-if-gui (&rest action)
+  "apply ACTION if emacs is run in GUI context, regardless of daemonp or display-graphic-p"
+  (if (daemonp)
+      (add-hook 'after-make-frame-functions
+                (lambda (frame)
+                  (select-frame frame)
+                  (if (display-graphic-p frame)
+                      (apply action))))
+    (if (display-graphic-p)
+        (apply action))))
+
+
 (set-face-attribute 'default nil :font "monospace" :height nemo/font-height-mono)
 (set-face-attribute 'fixed-pitch nil :font "monospace" :height nemo/font-height-mono)
 (set-face-attribute 'variable-pitch nil :font "sans-serif" :height nemo/font-height-sans)
@@ -326,13 +338,18 @@ Font size [[https://www.gnu.org/software/emacs/manual/html_node/elisp/Face-Attri
 ;; (when (member "SF Mono" (font-family-list))
 ;;   (set-face-attribute 'default nil :font "SF Mono" :height nemo/font-height-mono)
 ;;   (set-face-attribute 'fixed-pitch nil :family "SF Mono" :height nemo/font-height-mono))
-(defvar nemo/nerd-fonts-font "Symbols Nerd Font")
-
-(when (member nemo/nerd-fonts-font (font-family-list))
-  (set-fontset-font t nil (font-spec :height nemo/font-height-mono :font "Symbols Nerd Font")))
-
 (when (member "SF Pro Text" (font-family-list))
   (set-face-attribute 'variable-pitch nil :family "SF Pro Text" :height nemo/font-height-sans))
+
+(defvar nemo/nerd-fonts-font "Symbols Nerd Font")
+
+(defun nemo/set-fallback-fonts ()
+  "Set fallback fonts for icons/symbols."
+  (when (member nemo/nerd-fonts-font (font-family-list))
+    (set-fontset-font t nil (font-spec :height nemo/font-height-mono :font "Symbols Nerd Font")))
+  )
+
+(apply-if-gui #'nemo/set-fallback-fonts)
 #+end_src
 
 Use nerd-icons and apple emojis
@@ -565,6 +582,8 @@ try out =diff-hl= for highlighting diffs in magit:
     "gSb" 'magit-blame)
   :config
   (setq magit-mode-quit-window 'magit-restore-window-configuration
+        ediff-window-setup-function #'ediff-setup-windows-plain
+        ediff-merge-split-window-function #'split-window-horizontally
         ;;magit-auto-revert-mode t
         ))
 #+end_src
@@ -750,6 +769,15 @@ Also use =undo-fu=, which evil can use.
   (setq jinx-languages "en_GB dk_DK de_DE"))
 #+end_src
 
+Use =ispell= with company mode for completion in text-modes
+#+begin_src emacs-lisp 
+(use-package ispell
+  :straight t
+  :defer t
+  :config
+  (setq ispell-dictionary "en_GB"))
+#+end_src
+
 ** LaTeX
 #+begin_src emacs-lisp
 (use-package auctex
@@ -812,8 +840,7 @@ Taken from [[https://sophiebos.io/posts/prettifying-emacs-org-mode/][ here]].
     "m" '(:keymap nemo/org-map :wk "Org")
     )
   (general-def 'normal 'org-src-mode-map ",," 'org-edit-src-exit)
-  (general-def 'normal
-    :keymaps 'org-mode-map
+  (general-def 'normal 'org-mode-map
     "TAB" 'org-cycle
     "RET" 'org-open-at-point)
   :config
@@ -1144,7 +1171,7 @@ Use =consult-xref= for =lsp-xref= and =xref-find-references=.
   )
 #+end_src
 
-** Company - Auto-Completion
+** COMMENT Company - Auto-Completion
 #+begin_src emacs-lisp
 (use-package company
   :straight t
@@ -1157,20 +1184,12 @@ Use =consult-xref= for =lsp-xref= and =xref-find-references=.
    company-idle-delay 0.0))
 #+end_src
 
-Use =ispell= with company mode for completion in text-modes
-#+begin_src emacs-lisp 
-(use-package ispell
-  :straight t
-  :defer t
-  :config
-  (setq ispell-dictionary "en_GB"))
-#+end_src
-
-** COMMENT Corfu - Auto-Completion
+** Corfu - Auto-Completion
 Auto-completion using =corfu=:
 #+begin_src emacs-lisp
 (use-package corfu
   :straight t
+  :hook ((prog-mode text-mode) . completion-preview-mode)
   :custom
   ;; Enable auto completion
   (corfu-auto t)
@@ -1185,6 +1204,16 @@ Auto-completion using =corfu=:
   ;; Preselect the first suggestion
   (corfu-preselect 'first)
   (corfu-on-exact-match nil)
+  :custom
+  (lsp-completion-provider :none)
+  :init
+  (defun nemo/orderless-dispatch-flex-first (_pattern index _total)
+    (and (eq index 0) 'orderless-flex))
+
+  (defun nemo/lsp-mode-setup-completion ()
+    (setf (alist-get 'styles (alist-get 'lsp-capf completion-category-defaults)) '(orderless))
+    (add-hook 'orderless-style-dispatchers #'nemo/orderless-dispatch-flex-first nil 'local))
+  :hook (lsp-completion-mode . nemo/lsp-mode-setup-completion)
   :config
   (global-corfu-mode))
 
@@ -1197,26 +1226,28 @@ Auto-completion using =corfu=:
                               (if (display-graphic-p) -1 +1))))
   )
 
-(use-package emacs
-  ;; :custom
-  ;; TODO
-  :init
-  ;; TAB cycle if there are only few candidates
-  ;; (setq completion-cycle-threshold 3)
+;; (use-package emacs
+;;   ;; :custom
+;;   ;; TODO
+;;   :init
+;;   ;; TAB cycle if there are only few candidates
+;;   ;; (setq completion-cycle-threshold 3)
 
-  (setq enable-recursive-minibuffers t)
-  ;; Hide commands in M-x which do not apply to the current mode.  Corfu
-  ;; commands are hidden, since they are not supposed to be used via M-x.
-  (setq read-extended-command-predicate
-        #'command-completion-default-include-p)
+;;   (setq enable-recursive-minibuffers t)
+;;   ;; Hide commands in M-x which do not apply to the current mode.  Corfu
+;;   ;; commands are hidden, since they are not supposed to be used via M-x.
+;;   (setq read-extended-command-predicate
+;;         #'command-completion-default-include-p)
 
-  (setq text-mode-ispell-word-completion nil)
+;;   (setq text-mode-ispell-word-completion nil)
 
-  ;; Enable indentation+completion using the TAB key.
-  ;; `completion-at-point' is often bound to M-TAB.
-  (setq tab-always-indent 'complete))
+;;   ;; Enable indentation+completion using the TAB key.
+;;   ;; `completion-at-point' is often bound to M-TAB.
+;;   (setq tab-always-indent 'complete)
+;;   )
 #+end_src
 
+*** kind-icon
 Use =kind-icon= to decorate corfu completion candidates:
 #+begin_src emacs-lisp
 (use-package kind-icon
@@ -1226,45 +1257,47 @@ Use =kind-icon= to decorate corfu completion candidates:
   (add-to-list 'corfu-margin-formatters #'kind-icon-margin-formatter))
 #+end_src
 
-This package seems to slow down search quite a bit in common buffers like find-file and exectue-extended-comand:
-#+begin_src emacs-lisp :tangle no
+*** Cape
+This package seems to slow down search quite a bit in common buffers like =find-file= and =exectue-extended-comand=:
+#+begin_src emacs-lisp 
 (use-package cape
   :straight t
   ;; Bind dedicated completion commands
   ;; Alternative prefix keys: C-c p, M-p, M-+, ...
-  :bind (("C-c p p"  . completion-at-point) ;; capf
-         ("C-c p t"  . complete-tag)        ;; etags
-         ("C-c p d"  . cape-dabbrev)        ;; or dabbrev-completion
-         ("C-c p h"  . cape-history)
-         ("C-c p f"  . cape-file)
-         ("C-c p k"  . cape-keyword)
-         ("C-c p s"  . cape-symbol)
-         ("C-c p a"  . cape-abbrev)
-         ("C-c p l"  . cape-line)
-         ("C-c p w"  . cape-dict)
-         ("C-c p \\" . cape-tex)
-         ("C-c p _"  . cape-tex)
-         ("C-c p ^"  . cape-tex)
-         ("C-c p &"  . cape-sgml)
-         ("C-c p r"  . cape-rfc1345))
+  ;; :bind (("C-c p p"  . completion-at-point) ;; capf
+  ;;        ("C-c p t"  . complete-tag)        ;; etags
+  ;;        ("C-c p d"  . cape-dabbrev)        ;; or dabbrev-completion
+  ;;        ("C-c p h"  . cape-history)
+  ;;        ("C-c p f"  . cape-file)
+  ;;        ("C-c p k"  . cape-keyword)
+  ;;        ("C-c p s"  . cape-symbol)
+  ;;        ("C-c p a"  . cape-abbrev)
+  ;;        ("C-c p l"  . cape-line)
+  ;;        ("C-c p w"  . cape-dict)
+  ;;        ("C-c p \\" . cape-tex)
+  ;;        ("C-c p _"  . cape-tex)
+  ;;        ("C-c p ^"  . cape-tex)
+  ;;        ("C-c p &"  . cape-sgml)
+  ;;        ("C-c p r"  . cape-rfc1345))
   :init
   ;; Add `completion-at-point-functions', used by `completion-at-point'.
   ;; NOTE: The order matters!
-  (add-to-list 'completion-at-point-functions #'cape-dabbrev)
-  (add-to-list 'completion-at-point-functions #'cape-file)
-  (add-to-list 'completion-at-point-functions #'cape-elisp-block)
-  (add-to-list 'completion-at-point-functions #'cape-history)
-  (add-to-list 'completion-at-point-functions #'cape-keyword)
-  (add-to-list 'completion-at-point-functions #'cape-tex)
-  (add-to-list 'completion-at-point-functions #'cape-dict)
-  ;;(add-to-list 'completion-at-point-functions #'cape-sgml)
-  ;;(add-to-list 'completion-at-point-functions #'cape-rfc1345)
-  ;;(add-to-list 'completion-at-point-functions #'cape-abbrev)
-  ;;(add-to-list 'completion-at-point-functions #'cape-symbol)
-  ;;(add-to-list 'completion-at-point-functions #'cape-line)
+  ;; (add-to-list 'completion-at-point-functions #'cape-dabbrev)
+  ;; (add-to-list 'completion-at-point-functions #'cape-file)
+  ;; (add-to-list 'completion-at-point-functions #'cape-elisp-block)
+  ;; (add-to-list 'completion-at-point-functions #'cape-history)
+  ;; (add-to-list 'completion-at-point-functions #'cape-keyword)
+  ;; (add-to-list 'completion-at-point-functions #'cape-tex)
+  ;; (add-to-list 'completion-at-point-functions #'cape-dict)
+  ;; (add-to-list 'completion-at-point-functions #'cape-sgml)
+  ;; (add-to-list 'completion-at-point-functions #'cape-rfc1345)
+  ;; (add-to-list 'completion-at-point-functions #'cape-abbrev)
+  ;; (add-to-list 'completion-at-point-functions #'cape-symbol)
+  ;; (add-to-list 'completion-at-point-functions #'cape-line)
   )
 #+end_src
 
+*** Embark
 Use =embark= for in-mini-buffer actions:
 #+begin_src emacs-lisp :tangle no
 (use-package embark
@@ -1280,6 +1313,7 @@ Use =embark= for in-mini-buffer actions:
   :hook (embark-collect-mode . consult-preview-at-point-mode))
 #+end_src
 
+*** COMMENT corfu + prescient
 Use =corfu-prescient= to sort completion candidates:
 #+begin_src emacs-lisp 
 (use-package corfu-prescient
@@ -1289,7 +1323,7 @@ Use =corfu-prescient= to sort completion candidates:
   ;; :hook (corfu-mode . corfu-prescient-mode)
   ;; :hook (text-mode . corfu-prescient-mode)
   :config
-  (setq corfu-prescient-completion-styles '(prescient orderless basic partial-completion))
+  (setq corfu-prescient-completion-styles '(orderless prescient basic partial-completion))
   (corfu-prescient-mode 1)
   )
 
@@ -1318,7 +1352,8 @@ Fuzzy and out-of-order completion matching using =orderless=:
   (add-to-list 'completion-styles 'orderless)
   (setq orderless-matching-styles '(orderless-flex)
         completion-category-overrides '((file (styles basic partial-completion)))
-        orderless-component-separator "[ |]"))
+        orderless-component-separator "[ |]")
+  )
 #+end_src
 
 * Programming
@@ -1338,6 +1373,103 @@ Enable =hs-minor-mode= in =prog-mode= to allow for folding away comments and mod
   )
 #+end_src
 
+** Copilot 😭
+I feel so bad for this.. but its not awful..
+
+#+begin_src emacs-lisp
+(use-package plz
+  :straight t)
+
+(require 'ollama-complete)
+#+end_src
+
+#+begin_src emacs-lisp :tangle "local-lisp/ollama-complete.el"
+(defgroup ollama-complete nil "Ollama Code Completion." :group 'completion)
+
+(require 'plz)
+
+(defcustom ollama-complete-host "http://localhost:11434"
+  "URL of local ollama service."
+  :type 'url)
+
+(defcustom ollama-complete-model "qwen2.5-coder:3b-instruct-q4_K_M"
+  "Model to use for Fill-in-Middle completion.")
+
+(defvar ollama-complete--options
+  '(("temperature" . 0) ("top_p" . 0.5) ("num_predict" . 30)))
+
+(defvar ollama-complete--overlay nil)
+
+(defvar ollama-complete--overlay-buffer nil
+    "Buffer in which the overlay is placed.")
+
+(defun ollama-complete--fill-in-middle ()
+  "Ask ollama to generate response for fill-in-middle prompt."
+  (interactive)
+  (let ((prompt
+         (concat
+          "<|fim_prefix|>"
+          (concat
+           (buffer-substring-no-properties (point-min) (point))
+           (concat
+            "<|fim_suffix|>"
+            (concat
+             (buffer-substring-no-properties (point) (point-max))
+             "<|fim_middle|>"))))))
+    (setq ollama-complete--overlay-buffer (current-buffer))
+    (message "overlay-buffer: %s" ollama-complete--overlay-buffer)
+    (plz 'post
+      (concat ollama-complete-host "/api/generate")
+      :body (json-encode `(("model" . "qwen2.5-coder:3b-instruct-q4_K_M")
+                           ("raw" . t)
+                           ("stream" . :json-false)
+                           ("options" . ,ollama-complete--options)
+                           ("prompt" . ,prompt)
+                           ))
+      :as #'json-read
+      :then (lambda (alist)
+              (message "Ollama: FIM Completion: %s" (alist-get 'response alist))
+              (ollama-complete--make-overlay (alist-get 'response alist))))
+    )
+  )
+
+(defun ollama-complete--make-overlay (string)
+  "make overlay showign STRING at POS, or move existing overlay there."
+  (interactive)
+  (if ollama-complete--overlay-buffer
+      (with-current-buffer ollama-complete--overlay-buffer
+        (message "make-overlay %d \"%s\" %s" (point) string ollama-complete--overlay-buffer)
+        (if ollama-complete--overlay
+            (move-overlay ollama-complete--overlay (point) (point) ollama-complete--overlay-buffer)
+          (setq ollama-complete--overlay (make-overlay (point) (point) ollama-complete--overlay-buffer))
+          (overlay-put ollama-complete--overlay 'window (selected-window))
+          (overlay-put ollama-complete--overlay
+                       'after-string (propertize string 'face 'font-lock-comment-face))
+          (add-text-properties 0 1 '(cursor 1) string)
+          ollama-complete--overlay)))
+  )
+
+(defun ollama-complete--hide-overlay ()
+  "Hide temporary completion candidate overlay."
+  (interactive)
+  (when ollama-complete--overlay
+    (delete-overlay ollama-complete--overlay)
+    (setq ollama-complete--overlay nil)
+    (setq ollama-complete--overlay-buffer nil))
+  )
+
+(defun ollama-complete--insert-completion ()
+  "Hide temporary completion candidate overlay."
+  (interactive)
+  (when ollama-complete--overlay
+    (let ((completion (overlay-get ollama-complete--overlay 'after-string)))
+      (set-text-properties 0 (length completion) nil completion)
+        (goto-char (overlay-start ollama-complete--overlay))
+        (insert (substring-no-properties completion)))
+    (ollama-complete--hide-overlay)))
+
+(provide 'ollama-complete)
+#+end_src
 ** smart-parens
 #+begin_src emacs-lisp
 (use-package smartparens
@@ -1439,6 +1571,21 @@ LSP sets it's prefix key to =s-l= by default, which uses the Super key which I u
                                         ; lsp-ui-doc-use-webkit t
    )
   :commands lsp-ui-mode)
+
+(defvar-local nemo/lsp-format-on-save t)
+
+(define-minor-mode nemo/lsp-format-on-save-mode
+  "Run lsp-format-buffer on save."
+  :lighter " fmt"
+  (if nemo/lsp-format-on-save-mode
+      (add-hook 'before-save-hook #'lsp-format-buffer nil t)
+      (remove-hook 'before-save-hook #'lsp-format-buffer nil t)
+    ))
+
+(defun nemo/do-lsp-format-on-save ()
+  "Format on save using LSP server."
+  (if nemo/lsp-format-on-save
+      (lsp-format-buffer)))
 #+end_src
 
 ** Graphics
@@ -1461,6 +1608,254 @@ hlsl-mode:
   (add-to-list 'auto-mode-alist '("\\.frag\\'" . hlsl-mode))
   )
 #+end_src
+
+#+begin_src emacs-lisp
+(require 'treesit)
+
+(add-to-list
+ 'treesit-language-source-alist
+ '(slang "https://github.com/tree-sitter-grammars/tree-sitter-slang"))
+
+(with-eval-after-load 'lsp-mode
+  (progn
+    ;; tree-sitter
+
+    ;; LSP
+    (add-to-list 'lsp-language-id-configuration '(".*\\.slang$" . "slang"))
+    (lsp-register-client (make-lsp-client
+                          :new-connection (lsp-stdio-connection "/opt/shader-slang-bin/bin/slangd")
+                          :activation-fn (lsp-activate-on "slang")
+                          :server-id 'slang))
+    ))
+
+(require 'c-ts-common)
+(require 'c-ts-mode)
+
+(defgroup slang nil "Khronos Slang Major Mode."
+  :group 'languages)
+
+(defcustom slang-ts-mode-indent-offset 4
+  "Number of spaces for each indentation step in `slang-ts-mode'."
+  :version "29.1"
+  :type 'integer
+  :safe 'integerp
+  :group 'slang)
+
+(declare-function treesit-parser-create "treesit.c")
+(declare-function treesit-node-parent "treesit.c")
+(declare-function treesit-node-start "treesit.c")
+(declare-function treesit-node-end "treesit.c")
+(declare-function treesit-node-child "treesit.c")
+(declare-function treesit-node-child-by-field-name "treesit.c")
+(declare-function treesit-node-type "treesit.c")
+(declare-function treesit-node-prev-sibling "treesit.c")
+(declare-function treesit-node-first-child-for-pos "treesit.c")
+(declare-function treesit-node-next-sibling "treesit.c")
+(declare-function treesit-parser-set-included-ranges "treesit.c")
+(declare-function treesit-query-compile "treesit.c")
+
+;; taken from rust-ts-mode
+(defvar slang-ts-mode--syntax-table
+  (let ((table (make-syntax-table)))
+    (modify-syntax-entry ?+   "."      table)
+    (modify-syntax-entry ?-   "."      table)
+    (modify-syntax-entry ?=   "."      table)
+    (modify-syntax-entry ?%   "."      table)
+    (modify-syntax-entry ?&   "."      table)
+    (modify-syntax-entry ?|   "."      table)
+    (modify-syntax-entry ?^   "."      table)
+    (modify-syntax-entry ?!   "."      table)
+    (modify-syntax-entry ?@   "."      table)
+    (modify-syntax-entry ?~   "."      table)
+    (modify-syntax-entry ?<   "."      table)
+    (modify-syntax-entry ?>   "."      table)
+    (modify-syntax-entry ?/   ". 124b" table)
+    (modify-syntax-entry ?*   ". 23"   table)
+    (modify-syntax-entry ?\n  "> b"    table)
+    (modify-syntax-entry ?\^m "> b"    table)
+    table)
+  "Syntax table for `slang-ts-mode'.")
+
+(defvar slang-ts-mode--indent-rules
+  `((slang
+     ((parent-is "translation_unit") column-0 0)
+     ((node-is ")") parent-bol 0)
+     ((node-is "]") parent-bol 0)
+     ((node-is "}") (and parent parent-bol) 0)
+     ((and (parent-is "comment") c-ts-common-looking-at-star)
+      c-ts-common-comment-start-after-first-star -1)
+     ((parent-is "comment") prev-adaptive-prefix 0)
+     ((parent-is "parameter_list") parent-bol slang-ts-mode-indent-offset)
+     ((parent-is "binary_expression") parent-bol slang-ts-mode-indent-offset)
+     ((parent-is "compount_statement") parent-bol slang-ts-mode-indent-offset)
+     ((parent-is "field_declaration_list") parent-bol slang-ts-mode-indent-offset)
+     ))
+  "Tree-sitter indent rules for `slang-ts-mode'.")
+
+;; taken from rust-ts-mode
+(defun slang-ts-mode--syntax-propertize (beg end)
+  "Apply syntax properties to special characters between BEG and END.
+
+Apply syntax properties to various special characters with
+contextual meaning between BEG and END.
+
+The apostrophe \\=' should be treated as string when used for char literals.
+
+< and > are usually punctuation, e.g., as greater/less-than.  But
+when used for types, they should be considered pairs.
+
+This function checks for < and > in the changed RANGES and apply
+appropriate text property to alter the syntax of template
+delimiters < and >'s."
+  (goto-char beg)
+  (while (search-forward "'" end t)
+    (when (string-equal "char_literal"
+                        (treesit-node-type
+                         (treesit-node-at (match-beginning 0))))
+      (put-text-property (match-beginning 0) (match-end 0)
+                         'syntax-table (string-to-syntax "\""))))
+  (goto-char beg)
+  (while (re-search-forward (rx (or "<" ">")) end t)
+    (pcase (treesit-node-type
+            (treesit-node-parent
+             (treesit-node-at (match-beginning 0))))
+      ("template_argument_list"
+       (put-text-property (match-beginning 0)
+                          (match-end 0)
+                          'syntax-table
+                          (pcase (char-before)
+                            (?< '(4 . ?>))
+                            (?> '(5 . ?<))))))))
+
+;; (treesit-query-validate 'slang "(bitfield_clause (identifier) @font-lock-builtin-face) (:match ,(rx bos (or ,@slang-ts-mode--locations) eos))")
+
+(defvar slang-ts-mode--locations
+  '("SV_Position" "COLOR" "POSITION" "SV_Target")
+  "Slang built-in location hints for font-locking.")
+
+(defvar slang-ts-mode--keywords
+  '("struct" "interface" "where" "return")
+  "Slang built-in location hints for font-locking.")
+
+(defvar slang-ts-mode--types
+  `(,@(mapcar (lambda (type)
+                  (concat type "\\([1234]?\\|\\([1234]x[1234]\\)?\\)"))
+                '("bool" "int" "uint" "float"
+                  "min16float" "min10float" "min16int" "min12int" "min16uint")))
+  "Slang types for font-locking.")
+
+(defvar slang-ts-mode--operators
+  '("!"  "!=" "%" "%=" "&" "&=" "&&" "*" "*=" "+" "+=" "," "-" "-="
+    "->" "." "/" "/=" ":" ";" "<<" "<<=" "<" "<="
+    "=" "==" "=>" ">" ">=" ">>" ">>=" "^" "^=" "|" "|=" "||")
+  "Slang operators for tree-sitter font-locking.")
+
+(defvar slang-ts-mode--font-lock-settings
+  (treesit-font-lock-rules
+   :language 'slang
+   :feature 'bracket
+   '((["(" ")" "[" "]" "{" "}"]) @font-lock-bracket-face)
+
+   :language 'slang
+   :feature 'comment
+   '(((comment) @font-lock-comment-face))
+
+   :language 'slang
+   :feature 'builtin
+   '((bitfield_clause (identifier) @font-lock-builtin-face)
+     (semantics (identifier) @font-lock-builtin-face))
+
+   :language 'slang
+   :feature 'keyword
+   `([,@slang-ts-mode--keywords] @font-lock-keyword-face)
+
+   :language 'slang
+   :feature 'type
+   `(
+     ((call_expression function: (identifier) @font-lock-type-face)
+     (:match ,(rx bos
+                  (and (or "bool" "int" "uint" "float")
+                       (or
+                        (? (any "1" "2" "3" "4"))
+                        (? (and (any "1" "2" "3" "4") "x" (any "1" "2" "3" "4")))))
+                  eos) @font-lock-type-face))
+     ((call_expression function: (identifier) @font-lock-function-call-face))
+     (type_identifier) @font-lock-type-face)
+
+   :language 'slang
+   :feature 'definition
+   '(
+     (declaration declarator: (identifier) @font-lock-property-name-face)
+     (field_declaration declarator: (field_identifier) @font-lock-property-name-face)
+     (parameter_declaration declarator: (identifier) @font-lock-property-name-face)
+     (function_declarator declarator: (identifier) @font-lock-function-name-face)
+     (function_declarator declarator: (template_function name: (identifier) @font-lock-type-face))
+     (hlsl_attribute (call_expression function: (identifier) @font-lock-builtin-face))
+     )
+
+   :language 'slang
+   :feature 'function
+   '((call_expression function: (identifier) @font-lock-function-call-face)
+     (call_expression function: (_ field: (field_identifier) @font-lock-function-call-face))
+     )
+
+   :language 'slang
+   :feature 'string
+   '(((string_content) @font-lock-string-face))
+
+   :language 'slang
+   :feature 'type
+   '(((type_identifier) @font-lock-type-face)
+     (function_definition type: (type_identifier) @font-lock-type-face)
+     (declaration type: (type_identifier) @font-lock-type-face)
+     (field_declaration type: (type_identifier) @font-lock-type-face)
+     (parameter_declaration type: (type_identifier) @font-lock-type-face)
+     (template_argument_list (type_descriptor type: (type_identifier) @font-lock-type-face))
+     )
+
+   :language 'slang
+   :feature 'operator
+   `([,@slang-ts-mode--operators] @font-lock-operator-face)
+
+   :language 'slang
+   :feature 'variable
+   '(((identifier) @font-lock-property-use-face))
+
+   :language 'slang
+   :feature 'number
+   '(((number_literal) @font-lock-number-face))
+
+   :language 'slang
+   :feature 'property
+   '(((field_identifier) @font-lock-property-use-face))
+   ))
+
+(define-derived-mode slang-ts-mode prog-mode "Slang"
+  "Major mode for editing Slang, powered by tree-sitter."
+  :group 'slang
+  :syntax-table slang-ts-mode--syntax-table
+
+  (when (treesit-ready-p 'slang)
+    (treesit-parser-create 'slang)
+    (setq-local treesit-font-lock-feature-list
+                '((comment definition)
+                  (keyword string)
+                  (assignment attribute builtin variable constant escape-sequence number definition property type)
+                  (bracket delimiter error function operator property variable)
+                  ))
+    (setq-local syntax-propertize-function #'slang-ts-mode--syntax-propertize
+                indent-tabs-mode nil
+                treesit-font-lock-settings slang-ts-mode--font-lock-settings
+                treesit-simple-indent-rules slang-ts-mode--indent-rules)
+    (treesit-major-mode-setup))
+  )
+
+(if (treesit-ready-p 'slang)
+    (add-to-list 'auto-mode-alist '("\\.slang\\'" . slang-ts-mode)))
+
+(provide 'slang-ts-mode)
+#+end_src
+
 ** Rust
 [[https://github.com/rust-lang/rust-mode][=rust-mode=]]
 #+begin_src emacs-lisp
@@ -1477,7 +1872,8 @@ hlsl-mode:
 (use-package rustic
   :straight t
   :defer t
-  :after (rust-mode)
+  ;; :after (rust-mode)
+  :hook(rustic-mode . nemo/lsp-format-on-save-mode)
   :general-config
   (general-define-key
    :prefix-map 'nemo/rust-map
@@ -1503,14 +1899,15 @@ hlsl-mode:
     "m" '(:keymap nemo/rust-map :wk "Cargo")
     )
   :config
-  (setq rustic-format-on-save t
-        rust-format-on-save t
-        rust-mode-treesitter-derive t
-        rustic-format-trigger 'on-save
+  (setq rust-mode-treesitter-derive t
+        rustic-format-on-save nil
+        ;; rustic-format-trigger 'on-save
         ;; rustic-format-on-save-method #'rustic-format-buffer
         rustic-analyzer-command '("/usr/bin/rust-analyzer")
         )
+  ;; (setq nemo/lsp-format-on-save t)
   )
+
 #+end_src
 
 #+begin_src emacs-lisp