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;;; init-completion.el --- Completion Configuration File -*- lexical-binding: t -*-
;;; Commentary:
;; Config for completion-at-point (corfu), as well as orderless (see also init-minibuffer.el)
;; Most of it is taken from the READMEs and wikis of those packages
;;; Code:
(use-package dabbrev
:diminish)
(use-package hippie-expand
:ensure nil
:init
(setq hippie-expand-try-functions-list
'(;yas-hippie-try-expand
try-expand-dabbrev
try-expand-all-abbrevs
try-expand-dabbrev-all-buffers
try-expand-dabbrev-from-kill
try-complete-file-name-partially
try-complete-file-name
try-expand-list
try-expand-line
try-complete-lisp-symbol-partially
try-complete-lisp-symbol))
:bind
("M-/" . hippie-expand))
(use-package fancy-dabbrev
:diminish
:config
(global-fancy-dabbrev-mode))
(use-package emacs
:init
(setq completion-cycle-threshold 3)
(setq tab-always-indent 'complete))
(use-package orderless
:bind (:map minibuffer-local-completion-map
("C-l" . my/orderless-match-components-literally))
:custom (orderless-component-separator 'orderless-escapable-split-on-space)
:init
(setq completion-styles '(orderless basic)
completion-category-defaults nil
completion-category-overrides '((file (styles . (partial-completion orderless)))))
(defun my/orderless-match-components-literally ()
"Components match literally for the rest of the session."
(interactive)
(setq-local orderless-matching-styles '(orderless-literal)
orderless-style-dispatchers nil))
:config
;; Recognizes the following patterns:
;; * ~flex flex~
;; * =literal literal=
;; * %char-fold char-fold%
;; * `initialism initialism`
;; * !without-literal without-literal!
;; * .ext (file extension)
;; * regexp$ (regexp matching at end)
(defun my/orderless-dispatch (pattern _index _total)
(cond
;; Ensure that $ works with Consult commands, which add disambiguation suffixes
((string-suffix-p "$" pattern) `(orderless-regexp . ,(concat (substring pattern 0 -1) "[\x100000-\x10FFFD]*$")))
;; File extensions
((string-match-p "\\`\\.." pattern) `(orderless-regexp . ,(concat "\\." (substring pattern 1) "[\x100000-\x10FFFD]*$")))
;; Ignore single !
((string= "!" pattern) `(orderless-literal . ""))
;; Character folding
((string-prefix-p "%" pattern) `(char-fold-to-regexp . ,(substring pattern 1)))
((string-suffix-p "%" pattern) `(char-fold-to-regexp . ,(substring pattern 0 -1)))
;; Without literal
((string-prefix-p "!" pattern) `(orderless-without-literal . ,(substring pattern 1)))
((string-suffix-p "!" pattern) `(orderless-without-literal . ,(substring pattern 0 -1)))
;; Initialism matching
((string-prefix-p "`" pattern) `(orderless-initialism . ,(substring pattern 1)))
((string-suffix-p "`" pattern) `(orderless-initialism . ,(substring pattern 0 -1)))
;; Literal matching
((string-prefix-p "=" pattern) `(orderless-literal . ,(substring pattern 1)))
((string-suffix-p "=" pattern) `(orderless-literal . ,(substring pattern 0 -1)))
;; Flex matching
((string-prefix-p "~" pattern) `(orderless-flex . ,(substring pattern 1)))
((string-suffix-p "~" pattern) `(orderless-flex . ,(substring pattern 0 -1)))))
(setq orderless-matching-styles '(orderless-literal orderless-regexp orderless-strict-leading-initialism)
orderless-style-dispatchers '(my/orderless-dispatch)))
;; code completion - corfu
(use-package corfu
;; Optional customizations
:custom
(corfu-cycle t) ;; Enable cycling for `corfu-next/previous'
:bind (:map corfu-map
("TAB" . corfu-next)
([tab] . corfu-next)
("S-TAB" . corfu-previous)
([backtab] . corfu-previous))
:init
(corfu-global-mode))
(provide 'init-completion)
;;; init-completion.el ends here
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