| commit | author | age | ||
| 5cb5f7 | 1 | ;;; company-dabbrev.el --- dabbrev-like company-mode completion backend -*- lexical-binding: t -*- |
| C | 2 | |
| 3 | ;; Copyright (C) 2009, 2011, 2014, 2015, 2016 Free Software Foundation, Inc. | |
| 4 | ||
| 5 | ;; Author: Nikolaj Schumacher | |
| 6 | ||
| 7 | ;; This file is part of GNU Emacs. | |
| 8 | ||
| 9 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
| 10 | ;; it under the terms of the GNU General Public License as published by | |
| 11 | ;; the Free Software Foundation, either version 3 of the License, or | |
| 12 | ;; (at your option) any later version. | |
| 13 | ||
| 14 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
| 15 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 17 | ;; GNU General Public License for more details. | |
| 18 | ||
| 19 | ;; You should have received a copy of the GNU General Public License | |
| 20 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. | |
| 21 | ||
| 22 | ||
| 23 | ;;; Commentary: | |
| 24 | ;; | |
| 25 | ||
| 26 | ;;; Code: | |
| 27 | ||
| 28 | (require 'company) | |
| 29 | (require 'cl-lib) | |
| 30 | ||
| 31 | (defgroup company-dabbrev nil | |
| 32 | "dabbrev-like completion backend." | |
| 33 | :group 'company) | |
| 34 | ||
| 35 | (defcustom company-dabbrev-other-buffers 'all | |
| 36 | "Determines whether `company-dabbrev' should search other buffers. | |
| 37 | If `all', search all other buffers, except the ignored ones. If t, search | |
| 38 | buffers with the same major mode. See also `company-dabbrev-time-limit'." | |
| 39 | :type '(choice (const :tag "Off" nil) | |
| 40 | (const :tag "Same major mode" t) | |
| 41 | (const :tag "All" all))) | |
| 42 | ||
| 43 | (defcustom company-dabbrev-ignore-buffers "\\`[ *]" | |
| 44 | "Regexp matching the names of buffers to ignore. | |
| 45 | Or a function that returns non-nil for such buffers." | |
| 46 | :type '(choice (regexp :tag "Regexp") | |
| 47 | (function :tag "Predicate")) | |
| 48 | :package-version '(company . "0.9.0")) | |
| 49 | ||
| 50 | (defcustom company-dabbrev-time-limit .1 | |
| 51 | "Determines how many seconds `company-dabbrev' should look for matches." | |
| 52 | :type '(choice (const :tag "Off" nil) | |
| 53 | (number :tag "Seconds"))) | |
| 54 | ||
| 55 | (defcustom company-dabbrev-char-regexp "\\sw" | |
| 56 | "A regular expression matching the characters `company-dabbrev' looks for." | |
| 57 | :type 'regexp) | |
| 58 | ||
| 59 | (defcustom company-dabbrev-ignore-case 'keep-prefix | |
| 60 | "Non-nil to ignore case when collecting completion candidates. | |
| 61 | When it's `keep-prefix', the text before point will remain unchanged after | |
| 62 | candidate is inserted, even some of its characters have different case." | |
| 63 | :type '(choice | |
| 64 | (const :tag "Don't ignore case" nil) | |
| 65 | (const :tag "Ignore case" t) | |
| 66 | (const :tag "Keep case before point" keep-prefix))) | |
| 67 | ||
| 68 | (defcustom company-dabbrev-downcase 'case-replace | |
| 69 | "Whether to downcase the returned candidates. | |
| 70 | ||
| 71 | The value of nil means keep them as-is. | |
| 72 | `case-replace' means use the value of `case-replace'. | |
| 73 | Any other value means downcase. | |
| 74 | ||
| 75 | If you set this value to nil, you may also want to set | |
| 76 | `company-dabbrev-ignore-case' to any value other than `keep-prefix'." | |
| 77 | :type '(choice | |
| 78 | (const :tag "Keep as-is" nil) | |
| 79 | (const :tag "Downcase" t) | |
| 80 | (const :tag "Use case-replace" case-replace))) | |
| 81 | ||
| 82 | (defcustom company-dabbrev-minimum-length 4 | |
| 83 | "The minimum length for the completion candidate to be included. | |
| 84 | This variable affects both `company-dabbrev' and `company-dabbrev-code'." | |
| 85 | :type 'integer | |
| 86 | :package-version '(company . "0.8.3")) | |
| 87 | ||
| 88 | (defcustom company-dabbrev-ignore-invisible nil | |
| 89 | "Non-nil to skip invisible text." | |
| 90 | :type 'boolean | |
| 91 | :package-version '(company . "0.9.0")) | |
| 92 | ||
| 93 | (defmacro company-dabbrev--time-limit-while (test start limit freq &rest body) | |
| 94 | (declare (indent 3) (debug t)) | |
| 95 | `(let ((company-time-limit-while-counter 0)) | |
| 96 | (catch 'done | |
| 97 | (while ,test | |
| 98 | ,@body | |
| 99 | (and ,limit | |
| 100 | (= (cl-incf company-time-limit-while-counter) ,freq) | |
| 101 | (setq company-time-limit-while-counter 0) | |
| 102 | (> (float-time (time-since ,start)) ,limit) | |
| 103 | (throw 'done 'company-time-out)))))) | |
| 104 | ||
| 105 | (defun company-dabbrev--make-regexp () | |
| 106 | (concat "\\(?:" company-dabbrev-char-regexp "\\)+")) | |
| 107 | ||
| 108 | (defun company-dabbrev--search-buffer (regexp pos symbols start limit | |
| 109 | ignore-comments) | |
| 110 | (save-excursion | |
| 111 | (cl-labels ((maybe-collect-match | |
| 112 | () | |
| 113 | (let ((match (match-string-no-properties 0))) | |
| 114 | (when (and (>= (length match) company-dabbrev-minimum-length) | |
| 115 | (not (and company-dabbrev-ignore-invisible | |
| 116 | (invisible-p (match-beginning 0))))) | |
| 117 | (push match symbols))))) | |
| 118 | (goto-char (if pos (1- pos) (point-min))) | |
| 119 | ;; Search before pos. | |
| 120 | (let ((tmp-end (point))) | |
| 121 | (company-dabbrev--time-limit-while (and (not (input-pending-p)) | |
| 122 | (> tmp-end (point-min))) | |
| 123 | start limit 1 | |
| 124 | (ignore-errors | |
| 125 | (forward-char -10000)) | |
| 126 | (forward-line 0) | |
| 127 | (save-excursion | |
| 128 | ;; Before, we used backward search, but it matches non-greedily, and | |
| 129 | ;; that forced us to use the "beginning/end of word" anchors in | |
| 130 | ;; `company-dabbrev--make-regexp'. It's also about 2x slower. | |
| 131 | (while (and (not (input-pending-p)) | |
| 132 | (re-search-forward regexp tmp-end t)) | |
| 133 | (if (and ignore-comments (save-match-data (company-in-string-or-comment))) | |
| 134 | (re-search-forward "\\s>\\|\\s!\\|\\s\"" tmp-end t) | |
| 135 | (maybe-collect-match)))) | |
| 136 | (setq tmp-end (point)))) | |
| 137 | (goto-char (or pos (point-min))) | |
| 138 | ;; Search after pos. | |
| 139 | (company-dabbrev--time-limit-while (and (not (input-pending-p)) | |
| 140 | (re-search-forward regexp nil t)) | |
| 141 | start limit 25 | |
| 142 | (if (and ignore-comments (save-match-data (company-in-string-or-comment))) | |
| 143 | (re-search-forward "\\s>\\|\\s!\\|\\s\"" nil t) | |
| 144 | (maybe-collect-match))) | |
| 145 | symbols))) | |
| 146 | ||
| 147 | (defun company-dabbrev--search (regexp &optional limit other-buffer-modes | |
| 148 | ignore-comments) | |
| 149 | (let* ((start (current-time)) | |
| 150 | (symbols (company-dabbrev--search-buffer regexp (point) nil start limit | |
| 151 | ignore-comments))) | |
| 152 | (when other-buffer-modes | |
| 153 | (cl-dolist (buffer (delq (current-buffer) (buffer-list))) | |
| 154 | (unless (if (stringp company-dabbrev-ignore-buffers) | |
| 155 | (string-match-p company-dabbrev-ignore-buffers | |
| 156 | (buffer-name buffer)) | |
| 157 | (funcall company-dabbrev-ignore-buffers buffer)) | |
| 158 | (with-current-buffer buffer | |
| 159 | (when (or (eq other-buffer-modes 'all) | |
| 160 | (apply #'derived-mode-p other-buffer-modes)) | |
| 161 | (setq symbols | |
| 162 | (company-dabbrev--search-buffer regexp nil symbols start | |
| 163 | limit ignore-comments))))) | |
| 164 | (and limit | |
| 165 | (> (float-time (time-since start)) limit) | |
| 166 | (cl-return)))) | |
| 167 | symbols)) | |
| 168 | ||
| 169 | (defun company-dabbrev--prefix () | |
| 170 | ;; Not in the middle of a word. | |
| 171 | (unless (looking-at company-dabbrev-char-regexp) | |
| 172 | ;; Emacs can't do greedy backward-search. | |
| 173 | (company-grab-line (format "\\(?:^\\| \\)[^ ]*?\\(\\(?:%s\\)*\\)" | |
| 174 | company-dabbrev-char-regexp) | |
| 175 | 1))) | |
| 176 | ||
| 177 | (defun company-dabbrev--filter (prefix candidates) | |
| 178 | (let ((completion-ignore-case company-dabbrev-ignore-case)) | |
| 179 | (all-completions prefix candidates))) | |
| 180 | ||
| 181 | ;;;###autoload | |
| 182 | (defun company-dabbrev (command &optional arg &rest ignored) | |
| 183 | "dabbrev-like `company-mode' completion backend." | |
| 184 | (interactive (list 'interactive)) | |
| 185 | (cl-case command | |
| 186 | (interactive (company-begin-backend 'company-dabbrev)) | |
| 187 | (prefix (company-dabbrev--prefix)) | |
| 188 | (candidates | |
| 189 | (let* ((case-fold-search company-dabbrev-ignore-case) | |
| 190 | (words (company-dabbrev--search (company-dabbrev--make-regexp) | |
| 191 | company-dabbrev-time-limit | |
| 192 | (pcase company-dabbrev-other-buffers | |
| 193 | (`t (list major-mode)) | |
| 194 | (`all `all)))) | |
| 195 | (downcase-p (if (eq company-dabbrev-downcase 'case-replace) | |
| 196 | case-replace | |
| 197 | company-dabbrev-downcase))) | |
| 198 | (setq words (company-dabbrev--filter arg words)) | |
| 199 | (if downcase-p | |
| 200 | (mapcar 'downcase words) | |
| 201 | words))) | |
| 202 | (ignore-case company-dabbrev-ignore-case) | |
| 203 | (duplicates t))) | |
| 204 | ||
| 205 | (provide 'company-dabbrev) | |
| 206 | ;;; company-dabbrev.el ends here | |
