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;;; Copyright 1988-92, 1994-95, 1999, 2000, 2003, 2007, 2008
;;; Free Software Foundation, Inc.
;;; Written by Steve Byrne.
;;; This file is part of GNU Smalltalk.
;;; GNU Smalltalk 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 2, or (at your option) any later
;;; version.
;;; GNU Smalltalk 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 Smalltalk; see the file COPYING. If not, write to the Free
;;; Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
;;; Incorporates Frank Caggiano's changes for Emacs 19.
;;; Updates and changes for Emacs 20 and 21 by David Forster
(require 'comint)
(defvar smalltalk-prompt-pattern "^st> *"
"Regexp to match prompts in smalltalk buffer.")
(defvar *gst-process* nil
"Holds the GNU Smalltalk process")
(defvar gst-program-name "@bindir@/gst -V"
"GNU Smalltalk command to run. Do not use the -a, -f or -- options.")
(defvar smalltalk-command-string nil
"Non nil means that we're accumulating output from Smalltalk")
(defvar smalltalk-eval-data nil
(defvar smalltalk-ctl-t-map
(let ((keymap (make-sparse-keymap)))
(define-key keymap "\C-d" 'smalltalk-toggle-decl-tracing)
(define-key keymap "\C-e" 'smalltalk-toggle-exec-tracing)
(define-key keymap "\C-v" 'smalltalk-toggle-verbose-exec-tracing)
"Keymap of subcommands of C-c C-t, tracing related commands")
(defvar gst-mode-map
(let ((keymap (copy-keymap comint-mode-map)))
(define-key keymap "\C-c\C-t" smalltalk-ctl-t-map)
(define-key keymap "\C-\M-f" 'smalltalk-forward-sexp)
(define-key keymap "\C-\M-b" 'smalltalk-backward-sexp)
(define-key keymap "\C-cd" 'smalltalk-doit)
(define-key keymap "\C-cf" 'smalltalk-filein)
(define-key keymap "\C-cp" 'smalltalk-print)
(define-key keymap "\C-cq" 'smalltalk-quit)
(define-key keymap "\C-cs" 'smalltalk-snapshot)
"Keymap used in Smalltalk interactor mode.")
(defun gst (command-line)
"Invoke GNU Smalltalk"
(interactive (list (if (null current-prefix-arg)
(setq gst-program-name command-line)
(funcall (if (not (eq major-mode 'gst-mode))
;; invoked from a Smalltalk interactor window, so stay
;; there
(apply 'make-gst "gst" (parse-smalltalk-command gst-program-name)))
(setq *smalltalk-process* (get-buffer-process (current-buffer))))
(defun read-smalltalk-command (&optional command-line)
"Reads the program name and arguments to pass to Smalltalk,
providing COMMAND-LINE as a default (which itself defaults to
`gst-program-name'), answering the string."
(read-string "Invoke Smalltalk: " (or command-line gst-program-name)))
(defun smalltalk-file-name (str)
(if (file-name-directory str) (expand-file-name str) str))
(defun parse-smalltalk-command (&optional str)
"Parse a list of command-line arguments from STR (default
`gst-program-name'), adding --emacs-mode and answering the list."
(unless str (setq str gst-program-name))
(let (start end result-args)
(while (setq start (string-match "[^ \t]" str))
(setq end (or (string-match " " str start) (length str)))
(push (smalltalk-file-name (substring str start end)) result-args)
(if (null (cdr result-args)) (push "--emacs-mode" result-args))
(setq str (substring str end)))
(nreverse result-args)))
(defun make-gst (name &rest switches)
(let ((buffer (get-buffer-create (concat "*" name "*")))
proc status size)
(setq proc (get-buffer-process buffer))
(if proc (setq status (process-status proc)))
(set-buffer buffer)
;; (setq size (buffer-size))
(if (memq status '(run stop))
(if proc (delete-process proc))
(setq proc (apply 'start-process
name buffer
;; I'm choosing to leave these here
(format "TERMCAP=emacs:co#%d:tc=unknown:"
(setq name (process-name proc)))
(goto-char (point-max))
(set-marker (process-mark proc) (point))
(set-process-filter proc 'gst-filter)
(defun gst-filter (process string)
"Make sure that the window continues to show the most recently output
(let (where ch command-str)
(setq where 0) ;fake to get through the gate
(while (and string where)
(if smalltalk-command-string
(setq string (smalltalk-accum-command string)))
(if (and string
(setq where (string-match "\C-a\\|\C-b" string)))
(setq ch (aref string where))
(cond ((= ch ?\C-a) ;strip these out
(setq string (concat (substring string 0 where)
(substring string (1+ where)))))
((= ch ?\C-b) ;start of command
(setq smalltalk-command-string "") ;start this off
(setq string (substring string (1+ where))))))))
(set-buffer (process-buffer process))
(goto-char (point-max))
(and string
(setq mode-status "idle")
(insert string))
(if (process-mark process)
(set-marker (process-mark process) (point-max)))))
;; (if (eq (process-buffer process)
;; (current-buffer))
;; (goto-char (point-max)))
; (save-excursion
; (set-buffer (process-buffer process))
; (goto-char (point-max))
;; (set-window-point (get-buffer-window (current-buffer)) (point-max))
; (sit-for 0))
(let ((buf (current-buffer)))
(set-buffer (process-buffer process))
(goto-char (point-max)) (sit-for 0)
(set-window-point (get-buffer-window (current-buffer)) (point-max))
(set-buffer buf)))
(defun smalltalk-accum-command (string)
(let (where)
(setq where (string-match "\C-a" string))
(setq smalltalk-command-string
(concat smalltalk-command-string (substring string 0 where)))
(if where
(unwind-protect ;found the it
(smalltalk-handle-command smalltalk-command-string)
(setq smalltalk-command-string nil))
;; return the remainder
(substring string where))
;; we ate it all and didn't do anything with it
(defun smalltalk-handle-command (str)
(eval (read str)))
(defun gst-mode ()
"Major mode for interacting Smalltalk subprocesses.
Entry to this mode calls the value of gst-mode-hook with no arguments,
if that value is non-nil; likewise with the value of comint-mode-hook.
gst-mode-hook is called after comint-mode-hook."
(setq major-mode 'gst-mode)
(setq mode-name "GST")
(require 'comint)
(setq mode-line-format
'("" mode-line-modified mode-line-buffer-identification " "
global-mode-string " %[(" mode-name ": " mode-status
"%n" mode-line-process ")%]----" (-3 . "%p") "-%-"))
(setq comint-prompt-regexp smalltalk-prompt-pattern)
(setq comint-use-prompt-regexp t)
(use-local-map gst-mode-map)
(make-local-variable 'mode-status)
(make-local-variable 'smalltalk-command-string)
(setq smalltalk-command-string nil)
(setq mode-status "starting-up")
(run-hooks 'comint-mode-hook 'gst-mode-hook))
(defun smalltalk-print-region (start end &optional label)
(let (str filename line pos extra)
(goto-char (max start end))
(setq pos (point))
(while (progn (smalltalk-backward-whitespace)
(or (= (preceding-char) ?!)
(= (preceding-char) ?.)))
(backward-char 1))
(setq str (buffer-substring (min start end) (point)))
(setq extra (buffer-substring (point) pos))
;; unrelated, but reusing save-excursion
(goto-char (min start end))
(setq pos (1- (point)))
(setq filename (buffer-file-name))
(setq line (1+ (count-lines 1 (point))))))
(send-to-smalltalk (format "(%s) printNl%s\n" str extra)
(or label "eval")
(smalltalk-pos line pos))))
(defun smalltalk-eval-region (start end &optional label)
"Evaluate START to END as a Smalltalk expression in Smalltalk window.
If the expression does not end with an exclamation point, one will be
added (at no charge)."
(let (str filename line pos)
(setq str (buffer-substring start end))
(goto-char (min start end))
(setq pos (point))
(setq filename (buffer-file-name))
(setq line (1+ (count-lines 1 (point))))))
(send-to-smalltalk (concat str "\n")
(or label "eval")
(smalltalk-pos line pos))))
(defun smalltalk-doit (use-line)
(interactive "P")
(let* ((start (or (mark) (point)))
(end (point))
(rgn (if (or use-line
(= start end))
(cons start end))))
(smalltalk-eval-region (car rgn) (cdr rgn) "doIt")))
(defun smalltalk-print (use-line)
(interactive "P")
(let* ((start (or (mark) (point)))
(end (point))
(rgn (if (or use-line
(= start end))
(cons start end))))
(smalltalk-print-region (car rgn) (cdr rgn) "printIt")))
(defun smalltalk-bound-expr ()
"Returns a cons of the region of the buffer that contains a smalltalk expression."
(progn (next-line)
(defun smalltalk-pos (line pos)
(let ((filename (buffer-file-name)))
(if filename (list line filename pos) nil)))
(defun smalltalk-compile (start end)
(interactive "r")
(let ((str (buffer-substring start end))
(filename (buffer-file-name))
(pos start)
(line (save-excursion
(setq line (1+ (line-number-at-pos start)))))))
(send-to-smalltalk str "compile"
(smalltalk-pos line pos))))
(defun smalltalk-quote-strings (str)
(let (new-str)
(set-buffer (get-buffer-create " st-dummy "))
(insert str)
(goto-char 1)
(while (and (not (eobp))
(search-forward "'" nil 'to-end))
(insert "'"))
(defun smalltalk-snapshot (&optional snapshot-name)
(interactive (if current-prefix-arg
(list (setq snapshot-name
(read-file-name "Snapshot to: "))))))
(if snapshot-name
(send-to-smalltalk (format "ObjectMemory snapshot: '%s'\n" "Snapshot"))
(send-to-smalltalk "ObjectMemory snapshot\n" "Snapshot")))
(defun smalltalk-quit ()
"Terminate the Smalltalk session and associated process. Emacs remains
(send-to-smalltalk "! ! ObjectMemory quit!" "Quitting"))
(defun smalltalk-filein (filename)
"Do a FileStream>>fileIn: on FILENAME."
(interactive "fSmalltalk file to load: ")
(send-to-smalltalk (format "FileStream fileIn: '%s'\n"
(expand-file-name filename))
(defun smalltalk-filein-buffer ()
(send-to-smalltalk (buffer-string) "fileIn" (smalltalk-pos 1 1)))
(defun smalltalk-toggle-decl-tracing ()
"Smalltalk declarationTrace: Smalltalk declarationTrace not\n"))
(defun smalltalk-toggle-exec-tracing ()
"Smalltalk executionTrace: Smalltalk executionTrace not\n"))
(defun smalltalk-toggle-verbose-exec-tracing ()
"Smalltalk verboseTrace: Smalltalk verboseTrace not\n"))
(defun send-to-smalltalk (str &optional mode fileinfo)
(gst gst-program-name)
(goto-char (point-max))
(if (looking-at smalltalk-prompt-pattern)
(progn (end-of-line)
(insert "\n"))))
(if mode (setq mode-status mode))
(if fileinfo
(let (temp-file buf switch-back old-buf)
(setq temp-file (concat "/tmp/" (make-temp-name "gst")))
(setq buf (get-buffer-create " zap-buffer "))
(set-buffer buf)
(princ str buf)
(write-region (point-min) (point-max) temp-file nil 'no-message)
(kill-buffer buf)
"FileStream fileIn: '%s' line: %d from: '%s' at: %d\n"
temp-file (nth 0 fileinfo) (nth 1 fileinfo) (nth 2 fileinfo))))
(comint-send-string *smalltalk-process* str))
(switch-to-buffer-other-window (process-buffer *smalltalk-process*))))
(provide 'gst-mode)