-;;; company-dabbrev.el --- a dabbrev-like company-mode completion back-end
-;;
-;; Copyright (C) 2009 Nikolaj Schumacher
-;;
-;; This file is part of company 0.4.
-;;
-;; This program 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 2
-;; of the License, or (at your option) any later version.
-;;
-;; This program is distributed in the hope that it will be useful,
+;;; company-dabbrev.el --- dabbrev-like company-mode completion backend -*- lexical-binding: t -*-
+
+;; Copyright (C) 2009, 2011, 2014, 2015, 2016 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 this program. If not, see <http://www.gnu.org/licenses/>.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
+
+
+;;; Commentary:
+;;
+
+;;; Code:
(require 'company)
-(eval-when-compile (require 'cl))
+(require 'cl-lib)
+
+(defgroup company-dabbrev nil
+ "dabbrev-like completion backend."
+ :group 'company)
(defcustom company-dabbrev-other-buffers 'all
- "*Determines whether `company-dabbrev' should search other buffers.
-If 'all, search all other buffers. If t, search buffers with the same
-major-mode.
-See also `company-dabbrev-time-limit'."
- :group 'company
+ "Determines whether `company-dabbrev' should search other buffers.
+If `all', search all other buffers, except the ignored ones. If t, search
+buffers with the same major mode. See also `company-dabbrev-time-limit'."
:type '(choice (const :tag "Off" nil)
(const :tag "Same major mode" t)
(const :tag "All" all)))
-(defcustom company-dabbrev-time-limit .5
- "*Determines how many seconds `company-dabbrev' should look for matches."
- :group 'company
+(defcustom company-dabbrev-ignore-buffers "\\`[ *]"
+ "Regexp matching the names of buffers to ignore.
+Or a function that returns non-nil for such buffers."
+ :type '(choice (regexp :tag "Regexp")
+ (function :tag "Predicate"))
+ :package-version '(company . "0.9.0"))
+
+(defcustom company-dabbrev-time-limit .1
+ "Determines how many seconds `company-dabbrev' should look for matches."
:type '(choice (const :tag "Off" nil)
(number :tag "Seconds")))
(defcustom company-dabbrev-char-regexp "\\sw"
- "*A regular expression matching the characters `company-dabbrev' looks for."
- :group 'company
+ "A regular expression matching the characters `company-dabbrev' looks for."
:type 'regexp)
-(defmacro company-dabrev--time-limit-while (test start limit &rest body)
+(defcustom company-dabbrev-ignore-case 'keep-prefix
+ "Non-nil to ignore case when collecting completion candidates.
+When it's `keep-prefix', the text before point will remain unchanged after
+candidate is inserted, even some of its characters have different case.")
+
+(defcustom company-dabbrev-downcase 'case-replace
+ "Whether to downcase the returned candidates.
+
+The value of nil means keep them as-is.
+`case-replace' means use the value of `case-replace'.
+Any other value means downcase.
+
+If you set this value to nil, you may also want to set
+`company-dabbrev-ignore-case' to any value other than `keep-prefix'.")
+
+(defcustom company-dabbrev-minimum-length 4
+ "The minimum length for the completion candidate to be included.
+This variable affects both `company-dabbrev' and `company-dabbrev-code'."
+ :type 'integer
+ :package-version '(company . "0.8.3"))
+
+(defcustom company-dabbrev-ignore-invisible nil
+ "Non-nil to skip invisible text."
+ :type 'boolean
+ :package-version '(company . "0.9.0"))
+
+(defmacro company-dabbrev--time-limit-while (test start limit freq &rest body)
(declare (indent 3) (debug t))
`(let ((company-time-limit-while-counter 0))
(catch 'done
(while ,test
,@body
(and ,limit
- (eq (incf company-time-limit-while-counter) 25)
+ (= (cl-incf company-time-limit-while-counter) ,freq)
(setq company-time-limit-while-counter 0)
(> (float-time (time-since ,start)) ,limit)
(throw 'done 'company-time-out))))))
-(defsubst company-dabbrev--make-regexp (prefix)
- (concat "\\<" (if (equal prefix "")
- company-dabbrev-char-regexp
- (regexp-quote prefix))
- "\\(" company-dabbrev-char-regexp "\\)*\\>"))
+(defun company-dabbrev--make-regexp ()
+ (concat "\\(?:" company-dabbrev-char-regexp "\\)+"))
(defun company-dabbrev--search-buffer (regexp pos symbols start limit
ignore-comments)
(save-excursion
- (let (match)
+ (cl-labels ((maybe-collect-match
+ ()
+ (let ((match (match-string-no-properties 0)))
+ (when (and (>= (length match) company-dabbrev-minimum-length)
+ (not (and company-dabbrev-ignore-invisible
+ (invisible-p (match-beginning 0)))))
+ (push match symbols)))))
(goto-char (if pos (1- pos) (point-min)))
- ;; search before pos
- (company-dabrev--time-limit-while (re-search-backward regexp nil t)
- start limit
- (setq match (match-string-no-properties 0))
- (if (and ignore-comments (company-in-string-or-comment))
- (re-search-backward "\\s<\\|\\s!\\|\\s\"\\|\\s|" nil t)
- (push match symbols)))
+ ;; Search before pos.
+ (let ((tmp-end (point)))
+ (company-dabbrev--time-limit-while (> tmp-end (point-min))
+ start limit 1
+ (ignore-errors
+ (forward-char -10000))
+ (forward-line 0)
+ (save-excursion
+ ;; Before, we used backward search, but it matches non-greedily, and
+ ;; that forced us to use the "beginning/end of word" anchors in
+ ;; `company-dabbrev--make-regexp'. It's also about 2x slower.
+ (while (re-search-forward regexp tmp-end t)
+ (if (and ignore-comments (save-match-data (company-in-string-or-comment)))
+ (re-search-forward "\\s>\\|\\s!\\|\\s\"" tmp-end t)
+ (maybe-collect-match))))
+ (setq tmp-end (point))))
(goto-char (or pos (point-min)))
- ;; search after pos
- (company-dabrev--time-limit-while (re-search-forward regexp nil t)
- start limit
- (setq match (match-string-no-properties 0))
- (if (and ignore-comments (company-in-string-or-comment))
+ ;; Search after pos.
+ (company-dabbrev--time-limit-while (re-search-forward regexp nil t)
+ start limit 25
+ (if (and ignore-comments (save-match-data (company-in-string-or-comment)))
(re-search-forward "\\s>\\|\\s!\\|\\s\"" nil t)
- (push match symbols)))
+ (maybe-collect-match)))
symbols)))
-(defun company-dabbrev--search (regexp &optional limit other-buffers
+(defun company-dabbrev--search (regexp &optional limit other-buffer-modes
ignore-comments)
(let* ((start (current-time))
(symbols (company-dabbrev--search-buffer regexp (point) nil start limit
ignore-comments)))
- (when other-buffers
- (dolist (buffer (delq (current-buffer) (buffer-list)))
- (and (or (eq other-buffers 'all)
- (eq (buffer-local-value 'major-mode buffer) major-mode))
- (with-current-buffer buffer
- (setq symbols
- (company-dabbrev--search-buffer regexp nil symbols start
- limit ignore-comments))))
+ (when other-buffer-modes
+ (cl-dolist (buffer (delq (current-buffer) (buffer-list)))
+ (unless (if (stringp company-dabbrev-ignore-buffers)
+ (string-match-p company-dabbrev-ignore-buffers
+ (buffer-name buffer))
+ (funcall company-dabbrev-ignore-buffers buffer))
+ (with-current-buffer buffer
+ (when (or (eq other-buffer-modes 'all)
+ (apply #'derived-mode-p other-buffer-modes))
+ (setq symbols
+ (company-dabbrev--search-buffer regexp nil symbols start
+ limit ignore-comments)))))
(and limit
(> (float-time (time-since start)) limit)
- (return))))
+ (cl-return))))
symbols))
+(defun company-dabbrev--prefix ()
+ ;; Not in the middle of a word.
+ (unless (looking-at company-dabbrev-char-regexp)
+ ;; Emacs can't do greedy backward-search.
+ (company-grab-line (format "\\(?:^\\| \\)[^ ]*?\\(\\(?:%s\\)*\\)"
+ company-dabbrev-char-regexp)
+ 1)))
+
+(defun company-dabbrev--filter (prefix candidates)
+ (let ((completion-ignore-case company-dabbrev-ignore-case))
+ (all-completions prefix candidates)))
+
;;;###autoload
(defun company-dabbrev (command &optional arg &rest ignored)
- "A dabbrev-like `company-mode' completion back-end."
+ "dabbrev-like `company-mode' completion backend."
(interactive (list 'interactive))
- (case command
- ('interactive (company-begin-backend 'company-dabbrev))
- ('prefix (company-grab-word))
- ('candidates
- (mapcar 'downcase
- (company-dabbrev--search (company-dabbrev--make-regexp arg)
- company-dabbrev-time-limit
- company-dabbrev-other-buffers)))
- ('ignore-case t)
- ('duplicates t)))
+ (cl-case command
+ (interactive (company-begin-backend 'company-dabbrev))
+ (prefix (company-dabbrev--prefix))
+ (candidates
+ (let* ((case-fold-search company-dabbrev-ignore-case)
+ (words (company-dabbrev--search (company-dabbrev--make-regexp)
+ company-dabbrev-time-limit
+ (pcase company-dabbrev-other-buffers
+ (`t (list major-mode))
+ (`all `all))))
+ (downcase-p (if (eq company-dabbrev-downcase 'case-replace)
+ case-replace
+ company-dabbrev-downcase)))
+ (setq words (company-dabbrev--filter arg words))
+ (if downcase-p
+ (mapcar 'downcase words)
+ words)))
+ (ignore-case company-dabbrev-ignore-case)
+ (duplicates t)))
(provide 'company-dabbrev)
;;; company-dabbrev.el ends here