| commit | author | age | ||
| 5cb5f7 | 1 | ;;; company-nxml.el --- company-mode completion backend for nxml-mode |
| C | 2 | |
| 3 | ;; Copyright (C) 2009-2011, 2013, 2018 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 | ;; In Emacs >= 26, company-capf is used instead. | |
| 26 | ||
| 27 | ;;; Code: | |
| 28 | ||
| 29 | (require 'company) | |
| 30 | (require 'cl-lib) | |
| 31 | ||
| 32 | (defvar rng-open-elements) | |
| 33 | (defvar rng-validate-mode) | |
| 34 | (defvar rng-in-attribute-regex) | |
| 35 | (defvar rng-in-attribute-value-regex) | |
| 36 | (declare-function rng-set-state-after "rng-nxml") | |
| 37 | (declare-function rng-match-possible-start-tag-names "rng-match") | |
| 38 | (declare-function rng-adjust-state-for-attribute "rng-nxml") | |
| 39 | (declare-function rng-match-possible-attribute-names "rng-match") | |
| 40 | (declare-function rng-adjust-state-for-attribute-value "rng-nxml") | |
| 41 | (declare-function rng-match-possible-value-strings "rng-match") | |
| 42 | ||
| 43 | (defconst company-nxml-token-regexp | |
| 44 | "\\(?:[_[:alpha:]][-._[:alnum:]]*\\_>\\)") | |
| 45 | ||
| 46 | (defvar company-nxml-in-attribute-value-regexp | |
| 47 | (replace-regexp-in-string "w" company-nxml-token-regexp | |
| 48 | "<w\\(?::w\\)?\ | |
| 49 | \\(?:[ \t\r\n]+w\\(?::w\\)?[ \t\r\n]*=\ | |
| 50 | \[ \t\r\n]*\\(?:\"[^\"]*\"\\|'[^']*'\\)\\)*\ | |
| 51 | \[ \t\r\n]+\\(w\\(:w\\)?\\)[ \t\r\n]*=[ \t\r\n]*\ | |
| 52 | \\(\"\\([^\"]*\\>\\)\\|'\\([^']*\\>\\)\\)\\=" | |
| 53 | t t)) | |
| 54 | ||
| 55 | (defvar company-nxml-in-tag-name-regexp | |
| 56 | (replace-regexp-in-string "w" company-nxml-token-regexp | |
| 57 | "<\\(/?w\\(?::w?\\)?\\)?\\=" t t)) | |
| 58 | ||
| 59 | (defun company-nxml-all-completions (prefix alist) | |
| 60 | (let ((candidates (mapcar 'cdr alist)) | |
| 61 | (case-fold-search nil) | |
| 62 | filtered) | |
| 63 | (when (cdar rng-open-elements) | |
| 64 | (push (concat "/" (cdar rng-open-elements)) candidates)) | |
| 65 | (setq candidates (sort (all-completions prefix candidates) 'string<)) | |
| 66 | (while candidates | |
| 67 | (unless (equal (car candidates) (car filtered)) | |
| 68 | (push (car candidates) filtered)) | |
| 69 | (pop candidates)) | |
| 70 | (nreverse filtered))) | |
| 71 | ||
| 72 | (defmacro company-nxml-prepared (&rest body) | |
| 73 | (declare (indent 0) (debug t)) | |
| 74 | `(let ((lt-pos (save-excursion (search-backward "<" nil t))) | |
| 75 | xmltok-dtd) | |
| 76 | (when (and lt-pos (= (rng-set-state-after lt-pos) lt-pos)) | |
| 77 | ,@body))) | |
| 78 | ||
| 79 | (defun company-nxml-tag (command &optional arg &rest ignored) | |
| 80 | (cl-case command | |
| 81 | (prefix (and (derived-mode-p 'nxml-mode) | |
| 82 | rng-validate-mode | |
| 83 | (company-grab company-nxml-in-tag-name-regexp 1))) | |
| 84 | (candidates (company-nxml-prepared | |
| 85 | (company-nxml-all-completions | |
| 86 | arg (rng-match-possible-start-tag-names)))) | |
| 87 | (sorted t))) | |
| 88 | ||
| 89 | (defun company-nxml-attribute (command &optional arg &rest ignored) | |
| 90 | (cl-case command | |
| 91 | (prefix (and (derived-mode-p 'nxml-mode) | |
| 92 | rng-validate-mode | |
| 93 | (memq (char-after) '(?\ ?\t ?\n)) ;; outside word | |
| 94 | (company-grab rng-in-attribute-regex 1))) | |
| 95 | (candidates (company-nxml-prepared | |
| 96 | (and (rng-adjust-state-for-attribute | |
| 97 | lt-pos (- (point) (length arg))) | |
| 98 | (company-nxml-all-completions | |
| 99 | arg (rng-match-possible-attribute-names))))) | |
| 100 | (sorted t))) | |
| 101 | ||
| 102 | (defun company-nxml-attribute-value (command &optional arg &rest ignored) | |
| 103 | (cl-case command | |
| 104 | (prefix (and (derived-mode-p 'nxml-mode) | |
| 105 | rng-validate-mode | |
| 106 | (and (memq (char-after) '(?' ?\" ?\ ?\t ?\n)) ;; outside word | |
| 107 | (looking-back company-nxml-in-attribute-value-regexp nil) | |
| 108 | (or (match-string-no-properties 4) | |
| 109 | (match-string-no-properties 5) | |
| 110 | "")))) | |
| 111 | (candidates (company-nxml-prepared | |
| 112 | (let (attr-start attr-end colon) | |
| 113 | (and (looking-back rng-in-attribute-value-regex lt-pos) | |
| 114 | (setq colon (match-beginning 2) | |
| 115 | attr-start (match-beginning 1) | |
| 116 | attr-end (match-end 1)) | |
| 117 | (rng-adjust-state-for-attribute lt-pos attr-start) | |
| 118 | (rng-adjust-state-for-attribute-value | |
| 119 | attr-start colon attr-end) | |
| 120 | (all-completions | |
| 121 | arg (rng-match-possible-value-strings)))))))) | |
| 122 | ||
| 123 | ;;;###autoload | |
| 124 | (defun company-nxml (command &optional arg &rest ignored) | |
| 125 | "`company-mode' completion backend for `nxml-mode'." | |
| 126 | (interactive (list 'interactive)) | |
| 127 | (cl-case command | |
| 128 | (interactive (company-begin-backend 'company-nxml)) | |
| 129 | (prefix (or (company-nxml-tag 'prefix) | |
| 130 | (company-nxml-attribute 'prefix) | |
| 131 | (company-nxml-attribute-value 'prefix))) | |
| 132 | (candidates (cond | |
| 133 | ((company-nxml-tag 'prefix) | |
| 134 | (company-nxml-tag 'candidates arg)) | |
| 135 | ((company-nxml-attribute 'prefix) | |
| 136 | (company-nxml-attribute 'candidates arg)) | |
| 137 | ((company-nxml-attribute-value 'prefix) | |
| 138 | (sort (company-nxml-attribute-value 'candidates arg) | |
| 139 | 'string<)))) | |
| 140 | (sorted t))) | |
| 141 | ||
| 142 | (provide 'company-nxml) | |
| 143 | ;;; company-nxml.el ends here | |
