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139 lines
4.9 KiB
EmacsLisp
139 lines
4.9 KiB
EmacsLisp
;; bug-reference.el --- buttonize bug references
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;; Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
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;; Author: Tom Tromey <tromey@redhat.com>
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;; Created: 21 Mar 2007
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;; Keywords: tools
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file provides minor modes for putting clickable overlays on
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;; references to bugs. A bug reference is text like "PR foo/29292";
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;; this is mapped to a URL using a user-supplied format.
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;; Two minor modes are provided. One works on any text in the buffer;
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;; the other operates only on comments and strings.
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(defvar bug-reference-map
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(let ((map (make-sparse-keymap)))
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(define-key map [mouse-2] 'bug-reference-push-button)
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(define-key map (kbd "C-c RET") 'bug-reference-push-button)
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map)
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"Keymap used by bug reference buttons.")
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;; E.g., "http://gcc.gnu.org/PR%s"
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(defvar bug-reference-url-format nil
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"Format used to turn a bug number into a URL.
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The bug number is supplied as a string, so this should have a single %s.
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There is no default setting for this, it must be set per file.")
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;;;###autoload
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(put 'bug-reference-url-format 'safe-local-variable 'stringp)
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(defconst bug-reference-bug-regexp
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"\\(?:[Bb]ug ?#\\|PR [a-z-+]+/\\)\\([0-9]+\\)"
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"Regular expression which matches bug references.")
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(defun bug-reference-set-overlay-properties ()
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"Set properties of bug reference overlays."
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(put 'bug-reference 'evaporate t)
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(put 'bug-reference 'face 'link)
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(put 'bug-reference 'mouse-face 'highlight)
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(put 'bug-reference 'help-echo "mouse-1, C-c RET: visit this bug")
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(put 'bug-reference 'keymap bug-reference-map)
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(put 'bug-reference 'follow-link t))
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(bug-reference-set-overlay-properties)
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(defun bug-reference-unfontify (start end)
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"Remove bug reference overlays from region."
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(dolist (o (overlays-in start end))
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(when (eq (overlay-get o 'category) 'bug-reference)
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(delete-overlay o))))
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(defvar bug-reference-prog-mode)
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(defun bug-reference-fontify (start end)
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"Apply bug reference overlays to region."
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(save-excursion
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(let ((beg-line (progn (goto-char start) (line-beginning-position)))
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(end-line (progn (goto-char end) (line-end-position))))
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;; Remove old overlays.
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(bug-reference-unfontify beg-line end-line)
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(goto-char beg-line)
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(while (and (< (point) end-line)
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(re-search-forward bug-reference-bug-regexp end-line 'move))
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(when (or (not bug-reference-prog-mode)
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;; This tests for both comment and string syntax.
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(nth 8 (syntax-ppss)))
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(let ((overlay (make-overlay (match-beginning 0) (match-end 0)
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nil t nil)))
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(overlay-put overlay 'category 'bug-reference)
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;; Don't put a link if format is undefined
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(when bug-reference-url-format
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(overlay-put overlay 'bug-reference-url
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(format bug-reference-url-format
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(match-string-no-properties 1))))))))))
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;; Taken from button.el.
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(defun bug-reference-push-button (&optional pos use-mouse-action)
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"Open URL corresponding to the bug reference at POS."
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(interactive
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(list (if (integerp last-command-event) (point) last-command-event)))
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(if (and (not (integerp pos)) (eventp pos))
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;; POS is a mouse event; switch to the proper window/buffer
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(let ((posn (event-start pos)))
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(with-current-buffer (window-buffer (posn-window posn))
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(bug-reference-push-button (posn-point posn) t)))
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;; POS is just normal position.
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(dolist (o (overlays-at pos))
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;; It should only be possible to have one URL overlay.
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(let ((url (overlay-get o 'bug-reference-url)))
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(when url
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(browse-url url))))))
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;;;###autoload
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(define-minor-mode bug-reference-mode
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"Minor mode to buttonize bugzilla references in the current buffer."
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nil
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""
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nil
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(if bug-reference-mode
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(jit-lock-register #'bug-reference-fontify)
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(jit-lock-unregister #'bug-reference-fontify)
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(save-restriction
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(widen)
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(bug-reference-unfontify (point-min) (point-max)))))
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;;;###autoload
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(define-minor-mode bug-reference-prog-mode
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"Like `bug-reference-mode', but only buttonize in comments and strings."
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nil
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""
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nil
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(if bug-reference-prog-mode
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(jit-lock-register #'bug-reference-fontify)
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(jit-lock-unregister #'bug-reference-fontify)
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(save-restriction
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(widen)
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(bug-reference-unfontify (point-min) (point-max)))))
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;; arch-tag: b138abce-e5c3-475e-bd58-7afba40387ea
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;;; bug-reference.el ends here
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