blob: cc8ce8112dc370fdd666651490689538f90bde9e (
plain)
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
162
|
;;; swank-mrepl.lisp
;;
;; Licence: public domain
(in-package :swank)
(eval-when (:compile-toplevel :load-toplevel :execute)
(let ((api '(
*emacs-connection*
channel
channel-id
define-channel-method
defslimefun
dcase
log-event
process-requests
send-to-remote-channel
use-threads-p
wait-for-event
with-bindings
with-connection
with-top-level-restart
with-slime-interrupts
)))
(eval `(defpackage #:swank-api
(:use)
(:import-from #:swank . ,api)
(:export . ,api)))))
(defpackage :swank-mrepl
(:use :cl :swank-api)
(:export #:create-mrepl))
(in-package :swank-mrepl)
(defclass listener-channel (channel)
((remote :initarg :remote)
(env :initarg :env)
(mode :initform :eval)
(tag :initform nil)))
(defun package-prompt (package)
(reduce (lambda (x y) (if (<= (length x) (length y)) x y))
(cons (package-name package) (package-nicknames package))))
(defslimefun create-mrepl (remote)
(let* ((pkg *package*)
(conn *emacs-connection*)
(thread (if (use-threads-p)
(spawn-listener-thread conn)
nil))
(ch (make-instance 'listener-channel :remote remote :thread thread)))
(setf (slot-value ch 'env) (initial-listener-env ch))
(when thread
(swank/backend:send thread `(:serve-channel ,ch)))
(list (channel-id ch)
(swank/backend:thread-id (or thread (swank/backend:current-thread)))
(package-name pkg)
(package-prompt pkg))))
(defun initial-listener-env (listener)
`((*package* . ,*package*)
(*standard-output* . ,(make-listener-output-stream listener))
(*standard-input* . ,(make-listener-input-stream listener))))
(defun spawn-listener-thread (connection)
(swank/backend:spawn
(lambda ()
(with-connection (connection)
(dcase (swank/backend:receive)
((:serve-channel c)
(loop
(with-top-level-restart (connection (drop-unprocessed-events c))
(process-requests nil)))))))
:name "mrepl thread"))
(defun drop-unprocessed-events (channel)
(with-slots (mode) channel
(let ((old-mode mode))
(setf mode :drop)
(unwind-protect
(process-requests t)
(setf mode old-mode)))
(send-prompt channel)))
(define-channel-method :process ((c listener-channel) string)
(log-event ":process ~s~%" string)
(with-slots (mode remote) c
(ecase mode
(:eval (mrepl-eval c string))
(:read (mrepl-read c string))
(:drop))))
(defun mrepl-eval (channel string)
(with-slots (remote env) channel
(let ((aborted t))
(with-bindings env
(unwind-protect
(let ((result (with-slime-interrupts (read-eval-print string))))
(send-to-remote-channel remote `(:write-result ,result))
(setq aborted nil))
(setf env (loop for (sym) in env
collect (cons sym (symbol-value sym))))
(cond (aborted
(send-to-remote-channel remote `(:evaluation-aborted)))
(t
(send-prompt channel))))))))
(defun send-prompt (channel)
(with-slots (env remote) channel
(let ((pkg (or (cdr (assoc '*package* env)) *package*))
(out (cdr (assoc '*standard-output* env)))
(in (cdr (assoc '*standard-input* env))))
(when out (force-output out))
(when in (clear-input in))
(send-to-remote-channel remote `(:prompt ,(package-name pkg)
,(package-prompt pkg))))))
(defun mrepl-read (channel string)
(with-slots (tag) channel
(assert tag)
(throw tag string)))
(defun read-eval-print (string)
(with-input-from-string (in string)
(setq / ())
(loop
(let* ((form (read in nil in)))
(cond ((eq form in) (return))
(t (setq / (multiple-value-list (eval (setq + form))))))))
(force-output)
(if /
(format nil "~{~s~%~}" /)
"; No values")))
(defun make-listener-output-stream (channel)
(let ((remote (slot-value channel 'remote)))
(swank/backend:make-output-stream
(lambda (string)
(send-to-remote-channel remote `(:write-string ,string))))))
(defun make-listener-input-stream (channel)
(swank/backend:make-input-stream (lambda () (read-input channel))))
(defun set-mode (channel new-mode)
(with-slots (mode remote) channel
(unless (eq mode new-mode)
(send-to-remote-channel remote `(:set-read-mode ,new-mode)))
(setf mode new-mode)))
(defun read-input (channel)
(with-slots (mode tag remote) channel
(force-output)
(let ((old-mode mode)
(old-tag tag))
(setf tag (cons nil nil))
(set-mode channel :read)
(unwind-protect
(catch tag (process-requests nil))
(setf tag old-tag)
(set-mode channel old-mode)))))
(provide :swank-mrepl)
|
