1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
;;; haskell-menu.el --- A Haskell sessions menu -*- lexical-binding: t -*-
;; Copyright (C) 2013 Chris Done
;; Author: Chris Done <chrisdone@gmail.com>
;; This file is not part of GNU Emacs.
;; This file is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; This file is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; Todo:
;;; Code:
(require 'cl-lib)
(require 'haskell-session)
(require 'haskell-process)
(require 'haskell-interactive-mode)
(defcustom haskell-menu-buffer-name "*haskell-menu*"
"The name of the Haskell session menu buffer"
:group 'haskell-interactive
:type 'string)
;;;###autoload
(defun haskell-menu ()
"Launch the Haskell sessions menu."
(interactive)
(or (get-buffer haskell-menu-buffer-name)
(with-current-buffer (get-buffer-create haskell-menu-buffer-name)
(haskell-menu-mode)))
(switch-to-buffer-other-window (get-buffer haskell-menu-buffer-name))
(haskell-menu-revert-function nil nil))
(defvar haskell-menu-mode-map
(let ((map (make-sparse-keymap)))
(define-key map (kbd "n") 'next-line)
(define-key map (kbd "p") 'previous-line)
(define-key map (kbd "RET") 'haskell-menu-mode-ret)
map)
"Keymap for `haskell-menu-mode'.")
(define-derived-mode haskell-menu-mode special-mode "Haskell Session Menu"
"Major mode for managing Haskell sessions.
Each line describes one session.
Letters do not insert themselves; instead, they are commands."
(setq buffer-read-only t)
(setq-local revert-buffer-function 'haskell-menu-revert-function)
(setq truncate-lines t)
(haskell-menu-revert-function nil t))
(suppress-keymap haskell-menu-mode-map t)
(defun haskell-menu-revert-function (_arg1 _arg2)
"Function to refresh the display."
(let ((buffer-read-only nil)
(orig-line (line-number-at-pos))
(orig-col (current-column)))
(or (eq buffer-undo-list t)
(setq buffer-undo-list nil))
(erase-buffer)
(haskell-menu-insert-menu)
(goto-char (point-min))
(forward-line (1- orig-line))
(forward-char orig-col)))
(defun haskell-menu-insert-menu ()
"Insert the Haskell sessions menu to the current buffer."
(if (null haskell-sessions)
(insert "No Haskell sessions.")
(haskell-menu-tabulate
(list "Name" "PID" "Time" "RSS" "Cabal directory" "Working directory" "Command")
(mapcar (lambda (session)
(let ((process (haskell-process-process (haskell-session-process session))))
(cond
(process
(let ((id (process-id process)))
(list (propertize (haskell-session-name session) 'face 'buffer-menu-buffer)
(if (process-live-p process) (number-to-string id) "-")
(if (process-live-p process)
(format-time-string "%H:%M:%S"
(encode-time (cl-caddr (assoc 'etime (process-attributes id)))
0 0 0 0 0))
"-")
(if (process-live-p process)
(concat (number-to-string (/ (cdr (assoc 'rss (process-attributes id)))
1024))
"MB")
"-")
(haskell-session-cabal-dir session)
(haskell-session-current-dir session)
(mapconcat 'identity (process-command process) " "))))
(t (list (propertize (haskell-session-name session) 'face 'buffer-menu-buffer)
"—"
"—"
"—"
(haskell-session-cabal-dir session)
(haskell-session-current-dir session))))))
haskell-sessions))))
(defun haskell-menu-tabulate (headings rows)
"Prints a list of lists as a formatted table to the current buffer."
(let* ((columns (length headings))
(widths (make-list columns 0)))
;; Calculate column widths. This is kind of hideous.
(dolist (row rows)
(setq widths
(let ((list (list)))
(dotimes (i columns)
(setq list (cons (max (nth i widths)
(1+ (length (nth i row)))
(1+ (length (nth i headings))))
list)))
(reverse list))))
;; Print headings.
(let ((heading (propertize " " 'display '(space :align-to 0))))
(dotimes (i columns)
(setq heading (concat heading
(format (concat "%-" (number-to-string (nth i widths)) "s")
(nth i headings)))))
(setq header-line-format heading))
;; Print tabulated rows.
(dolist (row rows)
(dotimes (i columns)
(insert (format (concat "%-" (number-to-string (nth i widths)) "s")
(nth i row))))
(insert "\n"))))
(defun haskell-menu-mode-ret ()
"Handle RET key."
(interactive)
(let* ((name (save-excursion
(goto-char (line-beginning-position))
(buffer-substring-no-properties (point)
(progn (search-forward " ")
(forward-char -1)
(point)))))
(session (car (cl-remove-if-not (lambda (session)
(string= (haskell-session-name session)
name))
haskell-sessions))))
(switch-to-buffer (haskell-session-interactive-buffer session))))
(provide 'haskell-menu)
;;; haskell-menu.el ends here
|
