.emacs

(menu-bar-mode -1)
(scroll-bar-mode -1)
(tool-bar-mode -1)
(setq inhibit-startup-screen t)
(add-to-list 'default-frame-alist '(fullscreen . maximized))

(load-theme 'wombat)
(custom-set-variables
 ;; custom-set-variables was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 '(default-text-scale-amount 16)
 '(default-text-scale-mode t nil (default-text-scale))
 '(display-fill-column-indicator-column 80)
 '(markdown-command "pandoc --from markdown --to html5 --mathjax --standalone")
 '(org-support-shift-select t)
 '(package-selected-packages
   '(auctex auctex-latexmk clang-format cmake-font-lock cmake-mode
            default-text-scale dockerfile-mode ejson-mode
            exec-path-from-shell go-mode impatient-mode
            latex-preview-pane magit markdown-mode org-modern
            pdf-tools rust-mode)))
(custom-set-faces
 ;; custom-set-faces was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 )

(require 'package)
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t)
;; Comment/uncomment this line to enable MELPA Stable if desired.  See `package-archive-priorities`
;; and `package-pinned-packages`. Most users will not need or want to do this.
(add-to-list 'package-archives '("melpa-stable" . "https://stable.melpa.org/packages/") t)
;; (add-to-list 'package-archives
;;              '("melpa-stable" . "https://stable.melpa.org/packages/"))
(package-initialize)
;; (package-refresh-contents)

;; (require 'rust-mode)

(setq-default indent-tabs-mode nil)
(define-key global-map (kbd "C-x O") 'previous-window-any-frame)

(add-hook 'c++-mode-hook 'hs-minor-mode)
;; (add-hook 'c++-mode-hook 'lsp)
;; (add-hook 'c-mode-hook 'lsp)


;; zoom at startup, was 113 by default
(set-face-attribute 'default nil :height 240)
;; zoom in/out is global, via CM=, CM-, CM0 (last resets)
(require 'default-text-scale)
(default-text-scale-mode 1)


;; thanks chatgpt
(defun my/org-latex-scale-and-render ()
  "Save the buffer, set Org LaTeX previews to match current text scale, then re-render."
  (interactive)
  ;; 1) Save the current buffer
  (save-buffer)
  ;; 2) Derive a scale factor from the current `default` face height
  (let ((new-scale (/ (float (face-attribute 'default :height nil)) 100.0)))
    (setq org-format-latex-options
          (plist-put org-format-latex-options :scale new-scale)))
  ;; ;; 3) Re-render all LaTeX in the buffer; `t` forces image regeneration
  ;; (org-latex-preview (point-min) (point-max) t))
  (org-latex-preview '(64))
  (org-latex-preview '(16)))
(with-eval-after-load 'org
  (define-key org-mode-map (kbd "M-1") #'my/org-latex-scale-and-render))
;; (with-eval-after-load 'org
;;   (define-key org-mode-map (kbd "M-2") #'org-clear-latex-preview))

(with-eval-after-load 'org
  (defun my/org-clear-latex-preview (&optional beg end)
    "Interactive wrapper around `org-clear-latex-preview'.
Removes LaTeX preview overlays in region or entire buffer."
    (interactive "r")
    ;; If `org-clear-latex-preview' is missing or non-interactive,
    ;; you may see an error here.  Upgrade Org or define a fallback.
    (org-clear-latex-preview beg end))

  ;; Now bind our interactive wrapper to C-c C-x C-r in Org buffers
  (define-key org-mode-map (kbd "M-2") #'my/org-clear-latex-preview))


;;  ─── ~/.emacs or ~/.config/emacs/init.el ───
(require 'clang-format)                 ; make sure the function exists first

(defun my-clang-format-and-save ()
  "Format the current buffer with clang-format, then save it."
  (interactive)
  (clang-format-buffer)
  (save-buffer))

;; ;; *** place this near the very end of your init ***
;; (global-set-key (kbd "M-1") #'my-clang-format-and-save)

;; (add-hook 'c-mode-common-hook
;;           (lambda ()
;;             (local-set-key (kbd "M-1") #'my-clang-format-and-save)))

(add-hook 'c++-mode-hook ; runs when a C++ buffer starts	
          (lambda ()
            (local-set-key (kbd "M-1")
                           #'my-clang-format-and-save)))


;; save temporaries in ~/.emacs.d/auto-save/ instead alongside
(setq auto-save-file-name-transforms
          `((".*" ,(concat user-emacs-directory "auto-save/") t))) 



;; (require 'whitespace)
;; (setq whitespace-line-column 80) ;; limit line length
;; (setq whitespace-style '(face lines-tail))

;; (add-hook 'prog-mode-hook 'whitespace-mode)



;; (setq-default indent-tabs-mode t)
;; (setq-default tab-width 8) ; Assuming you want your tabs to be four spaces wide
;; (defvaralias 'c-basic-offset 'tab-width)

;; https://stackoverflow.com/questions/151945/how-do-i-control-how-emacs-makes-backup-files/18330742#18330742
(defvar --backup-directory (concat user-emacs-directory "backups"))
(if (not (file-exists-p --backup-directory))
        (make-directory --backup-directory t))
(setq backup-directory-alist `(("." . ,--backup-directory)))
(setq make-backup-files t               ; backup of a file the first time it is saved.
      backup-by-copying t               ; don't clobber symlinks
      version-control t                 ; version numbers for backup files
      delete-old-versions t             ; delete excess backup files silently
      delete-by-moving-to-trash t
      kept-old-versions 6               ; oldest versions to keep when a new numbered backup is made (default: 2)
      kept-new-versions 9               ; newest versions to keep when a new numbered backup is made (default: 2)
      auto-save-default t               ; auto-save every buffer that visits a file
      auto-save-timeout 20              ; number of seconds idle time before auto-save (default: 30)
      auto-save-interval 200            ; number of keystrokes between auto-saves (default: 300)
      )


;; (prefer-coding-system 'utf-8)
;; (set-default-coding-systems 'utf-8)
;; (setq x-select-request-type '(UTF8_STRING COMPOUND_TEXT TEXT STRING))
;; (setq default-buffer-file-coding-system 'utf-8)
;; (set-selection-coding-system 'utf-8)

(setq locale-coding-system 'utf-8)
(set-terminal-coding-system 'utf-8)
(set-keyboard-coding-system 'utf-8)
(set-selection-coding-system 'utf-8)
(prefer-coding-system 'utf-8)
(define-coding-system-alias 'UTF-8 'utf-8)