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authormattkae <mattkae@protonmail.com>2022-06-07 08:23:47 -0400
committermattkae <mattkae@protonmail.com>2022-06-07 08:23:47 -0400
commitbd18a38c2898548a3664a9ddab9f79c84f2caf4a (patch)
tree95b9933376770381bd8859782ae763be81c2d72b /elpa/company-20220326.48/company-elisp.el
parentb07628dddf418d4f47b858e6c35fd3520fbaeed2 (diff)
parentef160dea332af4b4fe5e2717b962936c67e5fe9e (diff)
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-;;; company-elisp.el --- company-mode completion backend for Emacs Lisp -*- lexical-binding: t -*-
-
-;; Copyright (C) 2009-2015, 2017, 2020 Free Software Foundation, Inc.
-
-;; Author: Nikolaj Schumacher
-
-;; This file is part of GNU Emacs.
-
-;; GNU Emacs is free software: you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation, either version 3 of the License, or
-;; (at your option) any later version.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;; GNU General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
-
-
-;;; Commentary:
-;;
-;; In newer versions of Emacs, company-capf is used instead.
-
-;;; Code:
-
-(require 'company)
-(require 'cl-lib)
-(require 'help-mode)
-(require 'find-func)
-
-(defgroup company-elisp nil
- "Completion backend for Emacs Lisp."
- :group 'company)
-
-(defcustom company-elisp-detect-function-context t
- "If enabled, offer Lisp functions only in appropriate contexts.
-Functions are offered for completion only after \\=' and \(."
- :type '(choice (const :tag "Off" nil)
- (const :tag "On" t)))
-
-(defcustom company-elisp-show-locals-first t
- "If enabled, locally bound variables and functions are displayed
-first in the candidates list."
- :type '(choice (const :tag "Off" nil)
- (const :tag "On" t)))
-
-(defun company-elisp--prefix ()
- (let ((prefix (company-grab-symbol)))
- (if prefix
- (when (if (company-in-string-or-comment)
- (= (char-before (- (point) (length prefix))) ?`)
- (company-elisp--should-complete))
- prefix)
- 'stop)))
-
-(defun company-elisp--predicate (symbol)
- (or (boundp symbol)
- (fboundp symbol)
- (facep symbol)
- (featurep symbol)))
-
-(defun company-elisp--fns-regexp (&rest names)
- (concat "\\_<\\(?:cl-\\)?" (regexp-opt names) "\\*?\\_>"))
-
-(defvar company-elisp-parse-limit 30)
-(defvar company-elisp-parse-depth 100)
-
-(defvar company-elisp-defun-names '("defun" "defmacro" "defsubst"))
-
-(defvar company-elisp-var-binding-regexp
- (apply #'company-elisp--fns-regexp "let" "lambda" "lexical-let"
- company-elisp-defun-names)
- "Regular expression matching head of a multiple variable bindings form.")
-
-(defvar company-elisp-var-binding-regexp-1
- (company-elisp--fns-regexp "dolist" "dotimes")
- "Regular expression matching head of a form with one variable binding.")
-
-(defvar company-elisp-fun-binding-regexp
- (company-elisp--fns-regexp "flet" "labels")
- "Regular expression matching head of a function bindings form.")
-
-(defvar company-elisp-defuns-regexp
- (concat "([ \t\n]*"
- (apply #'company-elisp--fns-regexp company-elisp-defun-names)))
-
-(defun company-elisp--should-complete ()
- (let ((start (point))
- (depth (car (syntax-ppss))))
- (not
- (when (> depth 0)
- (save-excursion
- (up-list (- depth))
- (when (looking-at company-elisp-defuns-regexp)
- (forward-char)
- (forward-sexp 1)
- (unless (= (point) start)
- (condition-case nil
- (let ((args-end (scan-sexps (point) 2)))
- (or (null args-end)
- (> args-end start)))
- (scan-error
- t)))))))))
-
-(defun company-elisp--locals (prefix functions-p)
- (let ((regexp (concat "[ \t\n]*\\(\\_<" (regexp-quote prefix)
- "\\(?:\\sw\\|\\s_\\)*\\_>\\)"))
- (pos (point))
- res)
- (condition-case nil
- (save-excursion
- (dotimes (_ company-elisp-parse-depth)
- (up-list -1)
- (save-excursion
- (when (eq (char-after) ?\()
- (forward-char 1)
- (when (ignore-errors
- (save-excursion (forward-list)
- (<= (point) pos)))
- (skip-chars-forward " \t\n")
- (cond
- ((looking-at (if functions-p
- company-elisp-fun-binding-regexp
- company-elisp-var-binding-regexp))
- (down-list 1)
- (condition-case nil
- (dotimes (_ company-elisp-parse-limit)
- (save-excursion
- (when (looking-at "[ \t\n]*(")
- (down-list 1))
- (when (looking-at regexp)
- (cl-pushnew (match-string-no-properties 1) res)))
- (forward-sexp))
- (scan-error nil)))
- ((unless functions-p
- (looking-at company-elisp-var-binding-regexp-1))
- (down-list 1)
- (when (looking-at regexp)
- (cl-pushnew (match-string-no-properties 1) res)))))))))
- (scan-error nil))
- res))
-
-(defun company-elisp-candidates (prefix)
- (let* ((predicate (company-elisp--candidates-predicate prefix))
- (locals (company-elisp--locals prefix (eq predicate 'fboundp)))
- (globals (company-elisp--globals prefix predicate))
- (locals (cl-loop for local in locals
- when (not (member local globals))
- collect local)))
- (if company-elisp-show-locals-first
- (append (sort locals 'string<)
- (sort globals 'string<))
- (append locals globals))))
-
-(defun company-elisp--globals (prefix predicate)
- (all-completions prefix obarray predicate))
-
-(defun company-elisp--candidates-predicate (prefix)
- (let* ((completion-ignore-case nil)
- (beg (- (point) (length prefix)))
- (before (char-before beg)))
- (if (and company-elisp-detect-function-context
- (not (memq before '(?' ?`))))
- (if (and (eq before ?\()
- (not
- (save-excursion
- (ignore-errors
- (goto-char (1- beg))
- (or (company-elisp--before-binding-varlist-p)
- (progn
- (up-list -1)
- (company-elisp--before-binding-varlist-p)))))))
- 'fboundp
- 'boundp)
- 'company-elisp--predicate)))
-
-(defun company-elisp--before-binding-varlist-p ()
- (save-excursion
- (and (prog1 (search-backward "(")
- (forward-char 1))
- (looking-at company-elisp-var-binding-regexp))))
-
-(defun company-elisp--doc (symbol)
- (let* ((symbol (intern symbol))
- (doc (if (fboundp symbol)
- (documentation symbol t)
- (documentation-property symbol 'variable-documentation t))))
- (and (stringp doc)
- (string-match ".*$" doc)
- (match-string 0 doc))))
-
-;;;###autoload
-(defun company-elisp (command &optional arg &rest ignored)
- "`company-mode' completion backend for Emacs Lisp."
- (interactive (list 'interactive))
- (cl-case command
- (interactive (company-begin-backend 'company-elisp))
- (prefix (and (derived-mode-p 'emacs-lisp-mode 'inferior-emacs-lisp-mode)
- (company-elisp--prefix)))
- (candidates (company-elisp-candidates arg))
- (sorted company-elisp-show-locals-first)
- (meta (company-elisp--doc arg))
- (doc-buffer (let ((symbol (intern arg)))
- (save-window-excursion
- (ignore-errors
- (cond
- ((fboundp symbol) (describe-function symbol))
- ((boundp symbol) (describe-variable symbol))
- ((featurep symbol) (describe-package symbol))
- ((facep symbol) (describe-face symbol))
- (t (signal 'user-error nil)))
- (help-buffer)))))
- (location (let ((sym (intern arg)))
- (cond
- ((fboundp sym) (find-definition-noselect sym nil))
- ((boundp sym) (find-definition-noselect sym 'defvar))
- ((featurep sym) (cons (find-file-noselect (find-library-name
- (symbol-name sym)))
- 0))
- ((facep sym) (find-definition-noselect sym 'defface)))))))
-
-(provide 'company-elisp)
-;;; company-elisp.el ends here