dotfiles/emacs/.emacs.d/config/init-completion.el

;; -*- lexical-binding: t; -*-

;; Nicer minibuffer completion

;; First Selectrum, which provides the core incremental minibuffer completion engine
(use-package selectrum
  :config
  (selectrum-mode 1)
  (leader-def-key "z" #'selectrum-repeat))

;; Then prescient, which adds the ability to sort and filter completions
(use-package selectrum-prescient
  :after selectrum
  :config
  (selectrum-prescient-mode 1)
  (prescient-persist-mode 1))

;; Marginalia adds annotations to completion candidates
(use-package marginalia
  :demand t
  :config
  (marginalia-mode 1)
  ;; When using Selectrum, ensure that Selectrum is refreshed when cycling annotations.
  (advice-add #'marginalia-cycle :after
              (lambda ()
                (when (bound-and-true-p selectrum-mode) (selectrum-exhibit))))
  (add-to-list 'marginalia-prompt-categories '("Find file:" . project-file))
  (add-to-list 'marginalia-prompt-categories '("Find dir:" . project-file))
  (add-to-list 'marginalia-prompt-categories '("Switch to project" . file))
  (add-to-list 'marginalia-prompt-categories '("recipe\\|package" . straight))
  (add-to-list 'marginalia-prompt-categories '("Password entry" . password-store))
  :general
  (minibuffer-local-map "M-A" #'marginalia-cycle)
  :custom
  (marginalia-annotators '(marginalia-annotators-heavy marginalia-annotators-light nil)))

;; Embark adds context actions to completion candidates (and other things!)
(use-package embark
  :config
  (defun embark-which-key-indicator ()
    "An embark indicator that displays keymaps using which-key.
The which-key help message will show the type and value of the
current target followed by an ellipsis if there are further
targets."
    (lambda (&optional keymap targets prefix)
      (if (null keymap)
          (which-key--hide-popup-ignore-command)
        (which-key--show-keymap
         (if (eq (caar targets) 'embark-become)
             "Become"
           (format "Act on %s '%s'%s"
                   (plist-get (car targets) :type)
                   (embark--truncate-target (plist-get (car targets) :target))
                   (if (cdr targets) "…" "")))
         (if prefix
             (pcase (lookup-key keymap prefix 'accept-default)
               ((and (pred keymapp) km) km)
               (_ (key-binding prefix 'accept-default)))
           keymap)
         nil nil t))))
  (embark-define-keymap embark-straight-map
    "Keymap for actions for straight.el"
    ("u" straight-visit-package-website)
    ("r" straight-get-recipe)
    ("i" straight-use-package)
    ("c" straight-check-package)
    ("F" straight-pull-package)
    ("f" straight-fetch-package)
    ("p" straight-push-package)
    ("n" straight-normalize-package)
    ("m" straight-merge-package))
  (add-to-list 'embark-keymap-alist '(straight . embark-straight-map))
  (embark-define-keymap embark-password-store-actions
    "Keymap for actions for password-store."
    ("c" password-store-copy)
    ("f" password-store-copy-field)
    ("i" password-store-insert)
    ("I" password-store-generate)
    ("r" password-store-rename)
    ("e" password-store-edit)
    ("k" password-store-remove)
    ("U" password-store-url))
  (add-to-list 'embark-keymap-alist '(password-store . embark-password-store-actions))
  ;; Add identifiers in LSP-mode as their own target type
  (with-eval-after-load 'lsp-mode
    (defun embark-target-lsp-identifier-at-point ()
      (when lsp-mode
        (when-let ((sym (embark-target-identifier-at-point)))
          (cons 'lsp-identifier (cdr sym)))))
    (add-to-list 'embark-target-finders 'embark-target-lsp-identifier-at-point)
    (embark-define-keymap embark-lsp-identifier-actions
      "Keymap for actions on LSP identifiers."
      :parent embark-identifier-map
      ("a" lsp-execute-code-action)
      ("s" lsp-describe-thing-at-point))
    (add-to-list 'embark-keymap-alist '(lsp-identifier . embark-lsp-identifier-actions))
    (add-to-list 'embark-target-injection-hooks '(lsp-execute-code-action embark--ignore-target))
    (add-to-list 'embark-target-injection-hooks '(lsp-describe-thing-at-point embark--ignore-target)))
  :general
  ((emacs motion insert) "C-." #'embark-act)
  ((emacs motion insert) "M-." #'embark-dwim)
  ('normal "C-." #'embark-act)
  ('normal "M-." #'embark-dwim)
  (embark-file-map "s" #'sudo-edit-find-file
                   "l" #'vlf
                   "g" #'magit-file-dispatch)
  ('normal embark-collect-mode-map
           "TAB" #'forward-button
           "?" #'describe-mode
           "A" #'embark-collect-direct-action-minor-mode
           "S" #'tabulated-list-sort
           "a" #'embark-act
           "b" #'backward-button
           "e" #'embark-export
           "f" #'forward-button
           "gr" #'revert-buffer
           "n" #'next-line
           "p" #'previous-line
           "q" #'quit-window
           "s" #'isearch-forward
           "v" #'embark-collect-toggle-view
           "z" #'embark-collect-zebra-minor-mode
           "{" #'tabulated-list-narrow-current-column
           "}" #'tabulated-list-widen-current-column
           "<backtab>" #'backward-button)
  :custom
  (embark-prompter 'embark-keymap-prompter)
  (embark-indicators '(embark-which-key-indicator
                       embark-highlight-indicator
                       embark-isearch-highlight-indicator)))

;; Consult adds a bunch of completing-read based utilities
(use-package consult
  :after selectrum
  :commands (consult-xref)
  :init
  (setq xref-show-xrefs-function #'consult-xref
        xref-show-definitions-function #'consult-xref)
  :custom
  (consult-project-root-function #'projectile-project-root)
  (consult-find-args "find . -not ( -wholename */.git/* -prune )")
  (consult-config '((consult-ripgrep :preview-key nil)
                    (consult-grep :preview-key nil)))
  :general
  ([remap switch-to-buffer] #'consult-buffer)
  ([remap imenu] #'consult-imenu)
  ([remap projectile-ripgrep] #'consult-ripgrep)
  ([remap projectile-grep] #'consult-grep)
  ("C-c p" #'consult-yank-from-kill-ring))

(use-package consult-flycheck
  :after flycheck
  :general
  (flycheck-command-map "!" #'consult-flycheck))

(use-package embark-consult
  :defer 1)

;; Make grep-like embark collect buffers editable
(use-package wgrep
  :general
  (grep-mode-map "C-x C-q" #'wgrep-change-to-wgrep-mode))

(provide 'init-completion)