1 ;;; fuel-debug.el -- debugging factor code
3 ;; Copyright (C) 2008 Jose Antonio Ortega Ruiz
4 ;; See http://factorcode.org/license.txt for BSD license.
6 ;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
7 ;; Keywords: languages, fuel, factor
8 ;; Start date: Sun Dec 07, 2008 04:16
12 ;; A mode for displaying the results of run-file and evaluation, with
13 ;; support for restarts.
19 (require 'fuel-font-lock)
24 (defgroup fuel-debug nil
25 "Major mode for interaction with the Factor debugger"
28 (defcustom fuel-debug-mode-hook nil
29 "Hook run after `fuel-debug-mode' activates"
33 (defcustom fuel-debug-show-short-help t
34 "Whether to show short help on available keys in debugger"
38 (fuel-font-lock--define-faces
39 fuel-debug-font-lock font-lock fuel-debug
40 ((error warning "highlighting errors")
41 (line variable-name "line numbers in errors/warnings")
42 (column variable-name "column numbers in errors/warnings")
43 (info comment "information headers")
44 (restart-number warning "restart numbers")
45 (restart-name function-name "restart names")))
48 ;;; Font lock and other pattern matching:
50 (defconst fuel-debug--compiler-info-alist
51 '((":warnings" . ?w) (":errors" . ?e) (":linkage" . ?l)))
53 (defconst fuel-debug--error-file-regex "^P\" \\([^\"]+\\)\"")
54 (defconst fuel-debug--error-line-regex "\\([0-9]+\\):")
55 (defconst fuel-debug--error-cont-regex "^ +\\(\\^\\)$")
57 (defconst fuel-debug--error-regex
59 fuel-debug--error-file-regex
60 fuel-debug--error-line-regex))
62 (defconst fuel-debug--compiler-info-regex
64 (regexp-opt (mapcar 'car fuel-debug--compiler-info-alist))))
66 (defconst fuel-debug--restart-regex "^:\\([0-9]+\\) \\(.+\\)")
68 (defconst fuel-debug--font-lock-keywords
69 `((,fuel-debug--error-file-regex . 'fuel-debug-font-lock-error)
70 (,fuel-debug--error-line-regex 1 'fuel-debug-font-lock-line)
71 (,fuel-debug--error-cont-regex 1 'fuel-debug-font-lock-column)
72 (,fuel-debug--restart-regex (1 'fuel-debug-font-lock-restart-number)
73 (2 'fuel-debug-font-lock-restart-name))
74 (,fuel-debug--compiler-info-regex 1 'fuel-debug-font-lock-restart-number)
75 ("^\\(Restarts?\\|Loading\\) .+$" . 'fuel-debug-font-lock-info)
76 ("^Error: " . 'fuel-debug-font-lock-error)))
78 (defun fuel-debug--font-lock-setup ()
79 (set (make-local-variable 'font-lock-defaults)
80 '(fuel-debug--font-lock-keywords t nil nil nil)))
85 (defvar fuel-debug--buffer nil)
87 (make-variable-buffer-local
88 (defvar fuel-debug--last-ret nil))
90 (make-variable-buffer-local
91 (defvar fuel-debug--file nil))
93 (defun fuel-debug--buffer ()
94 (or (and (buffer-live-p fuel-debug--buffer) fuel-debug--buffer)
96 (setq fuel-debug--buffer (get-buffer-create "*fuel dbg*"))
100 (defun fuel-debug--display-retort (ret &optional success-msg no-pop file)
101 (let ((err (fuel-eval--retort-error ret))
102 (inhibit-read-only t))
103 (with-current-buffer (fuel-debug--buffer)
105 (fuel-debug--display-output ret)
108 (when (and (not err) success-msg)
109 (message "%s" success-msg)
110 (insert "\n" success-msg "\n"))
112 (fuel-debug--display-restarts err)
115 (let ((hstr (fuel-debug--help-string err file)))
116 (if fuel-debug-show-short-help
117 (insert "-----------\n" hstr "\n")
118 (message "%s" hstr))))
119 (setq fuel-debug--last-ret ret)
120 (setq fuel-debug--file file)
121 (goto-char (point-max))
122 (when (and err (not no-pop)) (pop-to-buffer fuel-debug--buffer))
125 (defun fuel-debug--display-output (ret)
126 (let* ((last (fuel-eval--retort-output fuel-debug--last-ret))
127 (current (fuel-eval--retort-output ret))
129 (clen (length current))
130 (trail (and last (substring-no-properties last (/ llen 2))))
131 (err (fuel-eval--retort-error ret))
133 (save-excursion (insert current))
134 (when (and (> clen llen) (> llen 0) (search-forward trail nil t))
135 (delete-region p (point)))
136 (goto-char (point-max))
138 (insert (format "\nError: %S\n\n" (fuel-eval--error-name err))))))
140 (defun fuel-debug--display-restarts (err)
141 (let* ((rs (fuel-eval--error-restarts err))
144 (insert "Restarts:\n\n")
146 (insert (format ":%s %s\n" (1+ n) (nth n rs))))
149 (defun fuel-debug--help-string (err &optional file)
150 (format "Press %s%s%sq bury buffer"
151 (if (or file (fuel-eval--error-file err)) "g go to file, " "")
152 (let ((rsn (length (fuel-eval--error-restarts err))))
153 (cond ((zerop rsn) "")
154 ((= 1 rsn) "1 invoke restart, ")
155 (t (format "1-%s invoke restarts, " rsn))))
157 (dolist (ci fuel-debug--compiler-info-alist str)
159 (goto-char (point-min))
160 (when (search-forward (car ci) nil t)
161 (setq str (format "%c %s, %s" (cdr ci) (car ci) str))))))))
163 (defun fuel-debug--buffer-file ()
164 (with-current-buffer (fuel-debug--buffer)
166 (and fuel-debug--last-ret
167 (fuel-eval--error-file
168 (fuel-eval--retort-error fuel-debug--last-ret))))))
170 (defsubst fuel-debug--buffer-error ()
171 (fuel-eval--retort-error fuel-debug--last-ret))
173 (defsubst fuel-debug--buffer-restarts ()
174 (fuel-eval--error-restarts (fuel-debug--buffer-error)))
177 ;;; Buffer navigation:
179 (defun fuel-debug-goto-error ()
181 (let* ((err (or (fuel-debug--buffer-error)
182 (error "No errors reported")))
183 (file (or (fuel-debug--buffer-file)
184 (error "No file associated with error")))
185 (l/c (fuel-eval--error-line/column err))
186 (line (or (car l/c) 1))
187 (col (or (cdr l/c) 0)))
188 (find-file-other-window file)
192 (defun fuel-debug--read-restart-no ()
193 (let ((rs (fuel-debug--buffer-restarts)))
194 (unless rs (error "No restarts available"))
195 (let* ((rsn (length rs))
196 (prompt (format "Restart number? (1-%s): " rsn))
198 (while (or (> (setq no (read-number prompt)) rsn)
202 (defun fuel-debug-exec-restart (&optional n confirm)
203 (interactive (list (fuel-debug--read-restart-no)))
205 (rs (fuel-debug--buffer-restarts)))
206 (when (zerop (length rs))
207 (error "No restarts available"))
208 (when (or (< n 1) (> n (length rs)))
209 (error "Restart %s not available" n))
210 (when (or (not confirm)
211 (y-or-n-p (format "Invoke restart %s? " n)))
212 (message "Invoking restart %s" n)
213 (let* ((file (fuel-debug--buffer-file))
214 (buffer (if file (find-file-noselect file) (current-buffer))))
215 (with-current-buffer buffer
216 (fuel-debug--display-retort
217 (fuel-eval--send/wait `(:fuel ((:factor ,(format ":%s" n)))))
218 (format "Restart %s (%s) successful" n (nth (1- n) rs))))))))
220 (defun fuel-debug-show--compiler-info (info)
222 (goto-char (point-min))
223 (unless (re-search-forward (format "^%s" info) nil t)
224 (error "%s information not available" info))
225 (message "Retrieving %s info ..." info)
226 (unless (fuel-debug--display-retort
227 (fuel-eval--send/wait `(:fuel ((:factor ,info))))
228 "" (fuel-debug--buffer-file))
229 (error "Sorry, no %s info available" info))))
234 (defvar fuel-debug-mode-map
235 (let ((map (make-keymap)))
236 (suppress-keymap map)
237 (define-key map "g" 'fuel-debug-goto-error)
238 (define-key map "\C-c\C-c" 'fuel-debug-goto-error)
239 (define-key map "n" 'next-line)
240 (define-key map "p" 'previous-line)
241 (define-key map "q" 'bury-buffer)
243 (define-key map (vector (+ ?1 n))
244 `(lambda () (interactive) (fuel-debug-exec-restart ,(1+ n) t))))
245 (dolist (ci fuel-debug--compiler-info-alist)
246 (define-key map (vector (cdr ci))
247 `(lambda () (interactive) (fuel-debug-show--compiler-info ,(car ci)))))
250 (defun fuel-debug-mode ()
251 "A major mode for displaying Factor's compilation results and
252 invoking restarts as needed.
253 \\{fuel-debug-mode-map}"
255 (kill-all-local-variables)
256 (buffer-disable-undo)
257 (setq major-mode 'factor-mode)
258 (setq mode-name "Fuel Debug")
259 (use-local-map fuel-debug-mode-map)
260 (fuel-debug--font-lock-setup)
261 (setq fuel-debug--file nil)
262 (setq fuel-debug--last-ret nil)
263 (setq buffer-read-only t)
264 (run-hooks 'fuel-debug-mode-hook))
267 (provide 'fuel-debug)
268 ;;; fuel-debug.el ends here