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871968ca GM |
1 | ;; bug-reference.el --- buttonize bug references |
2 | ||
acaf905b | 3 | ;; Copyright (C) 2008-2012 Free Software Foundation, Inc. |
871968ca GM |
4 | |
5 | ;; Author: Tom Tromey <tromey@redhat.com> | |
6 | ;; Created: 21 Mar 2007 | |
7 | ;; Keywords: tools | |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
b1fc2b50 | 11 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
871968ca | 12 | ;; it under the terms of the GNU General Public License as published by |
b1fc2b50 GM |
13 | ;; the Free Software Foundation, either version 3 of the License, or |
14 | ;; (at your option) any later version. | |
871968ca GM |
15 | |
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
b1fc2b50 | 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
871968ca GM |
23 | |
24 | ;;; Commentary: | |
25 | ||
26 | ;; This file provides minor modes for putting clickable overlays on | |
27 | ;; references to bugs. A bug reference is text like "PR foo/29292"; | |
28 | ;; this is mapped to a URL using a user-supplied format. | |
29 | ||
30 | ;; Two minor modes are provided. One works on any text in the buffer; | |
31 | ;; the other operates only on comments and strings. | |
32 | ||
d0b822e3 SM |
33 | ;;; Code: |
34 | ||
871968ca GM |
35 | (defvar bug-reference-map |
36 | (let ((map (make-sparse-keymap))) | |
315eb96d | 37 | (define-key map [mouse-2] 'bug-reference-push-button) |
871968ca GM |
38 | (define-key map (kbd "C-c RET") 'bug-reference-push-button) |
39 | map) | |
40 | "Keymap used by bug reference buttons.") | |
41 | ||
42 | ;; E.g., "http://gcc.gnu.org/PR%s" | |
43 | (defvar bug-reference-url-format nil | |
44 | "Format used to turn a bug number into a URL. | |
45 | The bug number is supplied as a string, so this should have a single %s. | |
dbb5e44a SS |
46 | This can also be a function designator; it is called without arguments |
47 | and should return a string. | |
48 | It can use `match-string' to get parts matched against | |
49 | `bug-reference-bug-regexp', specifically: | |
50 | 1. issue kind (bug, patch, rfe &c) | |
51 | 2. issue number. | |
52 | ||
95c6cc3e SS |
53 | There is no default setting for this, it must be set per file. |
54 | If you set it to a symbol in the file Local Variables section, | |
55 | you need to add a `bug-reference-url-format' property to it: | |
56 | \(put 'my-bug-reference-url-format 'bug-reference-url-format t) | |
57 | so that it is considered safe, see `enable-local-variables'.") | |
871968ca | 58 | |
bffc6559 | 59 | ;;;###autoload |
95c6cc3e SS |
60 | (put 'bug-reference-url-format 'safe-local-variable |
61 | (lambda (s) | |
62 | (or (stringp s) | |
63 | (and (symbolp s) | |
64 | (get s 'bug-reference-url-format))))) | |
bffc6559 | 65 | |
871968ca | 66 | (defconst bug-reference-bug-regexp |
b544fef2 | 67 | "\\([Bb]ug ?#\\|[Pp]atch ?#\\|RFE ?#\\|PR [a-z-+]+/\\)\\([0-9]+\\(?:#[0-9]+\\)?\\)" |
871968ca GM |
68 | "Regular expression which matches bug references.") |
69 | ||
70 | (defun bug-reference-set-overlay-properties () | |
71 | "Set properties of bug reference overlays." | |
72 | (put 'bug-reference 'evaporate t) | |
73 | (put 'bug-reference 'face 'link) | |
74 | (put 'bug-reference 'mouse-face 'highlight) | |
75 | (put 'bug-reference 'help-echo "mouse-1, C-c RET: visit this bug") | |
76 | (put 'bug-reference 'keymap bug-reference-map) | |
77 | (put 'bug-reference 'follow-link t)) | |
78 | ||
79 | (bug-reference-set-overlay-properties) | |
80 | ||
81 | (defun bug-reference-unfontify (start end) | |
82 | "Remove bug reference overlays from region." | |
83 | (dolist (o (overlays-in start end)) | |
84 | (when (eq (overlay-get o 'category) 'bug-reference) | |
85 | (delete-overlay o)))) | |
86 | ||
d4296db3 GM |
87 | (defvar bug-reference-prog-mode) |
88 | ||
871968ca GM |
89 | (defun bug-reference-fontify (start end) |
90 | "Apply bug reference overlays to region." | |
91 | (save-excursion | |
92 | (let ((beg-line (progn (goto-char start) (line-beginning-position))) | |
93 | (end-line (progn (goto-char end) (line-end-position)))) | |
94 | ;; Remove old overlays. | |
95 | (bug-reference-unfontify beg-line end-line) | |
96 | (goto-char beg-line) | |
321d9c42 GM |
97 | (while (and (< (point) end-line) |
98 | (re-search-forward bug-reference-bug-regexp end-line 'move)) | |
99 | (when (or (not bug-reference-prog-mode) | |
100 | ;; This tests for both comment and string syntax. | |
101 | (nth 8 (syntax-ppss))) | |
102 | (let ((overlay (make-overlay (match-beginning 0) (match-end 0) | |
103 | nil t nil))) | |
104 | (overlay-put overlay 'category 'bug-reference) | |
1cec8b5f JL |
105 | ;; Don't put a link if format is undefined |
106 | (when bug-reference-url-format | |
dbb5e44a SS |
107 | (overlay-put overlay 'bug-reference-url |
108 | (if (stringp bug-reference-url-format) | |
109 | (format bug-reference-url-format | |
110 | (match-string-no-properties 2)) | |
111 | (funcall bug-reference-url-format)))))))))) | |
871968ca GM |
112 | |
113 | ;; Taken from button.el. | |
e02f48d7 | 114 | (defun bug-reference-push-button (&optional pos _use-mouse-action) |
871968ca GM |
115 | "Open URL corresponding to the bug reference at POS." |
116 | (interactive | |
117 | (list (if (integerp last-command-event) (point) last-command-event))) | |
118 | (if (and (not (integerp pos)) (eventp pos)) | |
119 | ;; POS is a mouse event; switch to the proper window/buffer | |
120 | (let ((posn (event-start pos))) | |
121 | (with-current-buffer (window-buffer (posn-window posn)) | |
122 | (bug-reference-push-button (posn-point posn) t))) | |
123 | ;; POS is just normal position. | |
124 | (dolist (o (overlays-at pos)) | |
125 | ;; It should only be possible to have one URL overlay. | |
126 | (let ((url (overlay-get o 'bug-reference-url))) | |
127 | (when url | |
128 | (browse-url url)))))) | |
129 | ||
130 | ;;;###autoload | |
131 | (define-minor-mode bug-reference-mode | |
ac6c8639 CY |
132 | "Toggle hyperlinking bug references in the buffer (Bug Reference mode). |
133 | With a prefix argument ARG, enable Bug Reference mode if ARG is | |
134 | positive, and disable it otherwise. If called from Lisp, enable | |
135 | the mode if ARG is omitted or nil." | |
871968ca GM |
136 | nil |
137 | "" | |
138 | nil | |
139 | (if bug-reference-mode | |
1cec8b5f | 140 | (jit-lock-register #'bug-reference-fontify) |
871968ca GM |
141 | (jit-lock-unregister #'bug-reference-fontify) |
142 | (save-restriction | |
143 | (widen) | |
144 | (bug-reference-unfontify (point-min) (point-max))))) | |
145 | ||
146 | ;;;###autoload | |
147 | (define-minor-mode bug-reference-prog-mode | |
148 | "Like `bug-reference-mode', but only buttonize in comments and strings." | |
149 | nil | |
150 | "" | |
151 | nil | |
152 | (if bug-reference-prog-mode | |
1cec8b5f | 153 | (jit-lock-register #'bug-reference-fontify) |
871968ca GM |
154 | (jit-lock-unregister #'bug-reference-fontify) |
155 | (save-restriction | |
156 | (widen) | |
157 | (bug-reference-unfontify (point-min) (point-max))))) | |
158 | ||
d0b822e3 | 159 | (provide 'bug-reference) |
871968ca | 160 | ;;; bug-reference.el ends here |