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[smlnj] Diff of /sml/trunk/sml-mode/sml-proc.el
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Diff of /sml/trunk/sml-mode/sml-proc.el

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revision 39, Sat Mar 14 04:41:37 1998 UTC revision 566, Mon Mar 6 07:20:58 2000 UTC
# Line 1  Line 1 
1  ;;; sml-proc.el. Comint based interaction mode for Standard ML.  ;;; sml-proc.el --- Comint based interaction mode for Standard ML.
2    
3  ;; Copyright (C) 1989, Lars Bo Nielsen, 1994,1997 Matthew J. Morley  ;; Copyright (C) 1989       Lars Bo Nielsen
4    ;; Copyright (C) 1994-1997  Matthew J. Morley
5    ;; Copyright (C) 1999-2000  Stefan Monnier
6    
7  ;; $Revision$  ;; $Revision$
8  ;; $Date$  ;; $Date$
# Line 31  Line 33 
33  ;; under 18.59 (or anywhere without comint, if there are such places).  ;; under 18.59 (or anywhere without comint, if there are such places).
34  ;; See sml-mode.el for further information.  ;; See sml-mode.el for further information.
35    
36  ;;; DESCRIPTION  ;;; Commentary:
37    
38  ;; Inferior-sml-mode is for interacting with an ML process run under  ;; Inferior-sml-mode is for interacting with an ML process run under
39  ;; emacs. This uses the comint package so you get history, expansion,  ;; emacs. This uses the comint package so you get history, expansion,
40  ;; backup and all the other benefits of comint. Interaction is  ;; backup and all the other benefits of comint. Interaction is
41  ;; achieved by M-x sml which starts a sub-process under emacs. You may  ;; achieved by M-x run-sml which starts a sub-process under emacs. You may
42  ;; need to set this up for autoloading in your .emacs:  ;; need to set this up for autoloading in your .emacs:
43    
44  ;; (autoload 'sml "sml-proc" "Run an inferior ML process." t)  ;; (autoload 'run-sml "sml-proc" "Run an inferior ML process." t)
45    
46  ;; Exactly what process is governed by the variable sml-program-name  ;; Exactly what process is governed by the variable sml-program-name
47  ;; -- just "sml" by default. If you give a prefix argument (C-u M-x  ;; -- just "sml" by default. If you give a prefix argument (C-u M-x
48  ;; sml) you will be prompted for a different program to execute from  ;; run-sml) you will be prompted for a different program to execute from
49  ;; the default -- if you just hit RETURN you get the default anyway --  ;; the default -- if you just hit RETURN you get the default anyway --
50  ;; along with the option to specify any command line arguments. Once  ;; along with the option to specify any command line arguments. Once
51  ;; you select the ML program name in this manner, it remains the  ;; you select the ML program name in this manner, it remains the
# Line 64  Line 66 
66  ;; region of text to the ML process, etc. Given a prefix argument to  ;; region of text to the ML process, etc. Given a prefix argument to
67  ;; these commands will switch you from the SML buffer to the ML  ;; these commands will switch you from the SML buffer to the ML
68  ;; process buffer as well as sending the text. If you get errors  ;; process buffer as well as sending the text. If you get errors
69  ;; reported by the compiler, C-c ` (sml-next-error) will step through  ;; reported by the compiler, C-x ` (next-error) will step through
70  ;; the errors with you.  ;; the errors with you.
71    
72  ;; NOTE. There is only limited support for this as it obviously  ;; NOTE. There is only limited support for this as it obviously
73  ;; depends on the compiler's error messages being recognised by the  ;; depends on the compiler's error messages being recognised by the
74  ;; mode. Error reporting is currently only geared up for SML/NJ,  ;; mode. Error reporting is currently only geared up for SML/NJ,
75  ;; Moscow ML, and Poly/ML (see file sml-{mosml,poly-ml}.el). Look at  ;; Moscow ML, and Poly/ML.  For other compilers, add the relevant
76  ;; the documentation for sml-error-parser and sml-next-error -- you  ;; regexp to sml-error-regexp-alist and send it to me.
 ;; may only need to modify the former to recover this feature for some  
 ;; other ML systems, along with sml-error-regexp.  
   
 ;; While small pieces of text can be fed quite happily into the ML  
 ;; process directly, lager pieces should (probably) be sent via a  
 ;; temporary file making use of the compiler's "use" command.  
   
 ;; CURRENT RATIONALE: you get sense out of the error messages if  
 ;; there's a real file associated with a block of code, and XEmacs is  
 ;; less likely to hang. These are likely to change.  
   
 ;; For more information see the variable sml-temp-threshold. You  
 ;; should set the variable sml-use-command appropriately for your ML  
 ;; compiler. By default things are set up to work for the SML/NJ  
 ;; compiler.  
   
 ;;; FOR YOUR .EMACS  
   
 ;; Here  are some ideas for inferior-sml-*-hooks:  
   
 ;; (setq inferior-sml-load-hook  
 ;;       '(lambda() "Set global defaults for inferior-sml-mode"  
 ;;          (define-key inferior-sml-mode-map "\C-cd"    'sml-cd)  
 ;;          (define-key          sml-mode-map "\C-cd"    'sml-cd)  
 ;;          (define-key          sml-mode-map "\C-c\C-f" 'sml-send-function)  
 ;;          (setq sml-temp-threshold 0))) ; safe: always use tmp file  
   
 ;; (setq inferior-sml-mode-hook  
 ;;       '(lambda() "Inferior SML mode defaults"  
 ;;          (setq comint-scroll-show-maximum-output t  
 ;;                comint-scroll-to-bottom-on-output t  
 ;;                comint-input-autoexpand nil)))  
77    
78  ;; ===================================================================  ;; To send pieces of code to the underlying compiler, we never send the text
79    ;; directly but use a temporary file instead.  This breaks if the compiler
80    ;; does not understand `use', but has the benefit of allowing better error
81    ;; reporting.
82    
83  ;;; INFERIOR ML MODE VARIABLES  ;; Bugs:
84    
85  (require 'sml-mode)  ;; Todo:
 (require 'comint)  
 (provide 'sml-proc)  
86    
87  (defvar sml-program-name "sml"  ;; - Keep improving `sml-compile'.
88    "*Program to run as ML.")  ;; - ignore warnings (if requested) for next-error
89    
90  (defvar sml-default-arg ""  ;;; Code:
   "*Default command line option to pass, if any.")  
91    
92  (defvar sml-make-command "CM.make()"  (eval-when-compile (require 'cl))
93    "The command used by default by `sml-make'.")  (require 'sml-mode)
94    (require 'sml-util)
95    (require 'comint)
96    (require 'compile)
97    
98  (defvar sml-make-file-name "sources.cm"  (defgroup sml-proc ()
99    "The name of the makefile that `sml-make' will look for (if non-nil).")    "Interacting with an SML process."
100      :group 'sml)
101  ;;(defvar sml-raise-on-error nil  
102  ;;  "*When non-nil, `sml-next-error' will raise the ML process's frame.")  (defcustom sml-program-name "sml"
103      "*Program to run as ML."
104  (defvar sml-temp-threshold 0    :group 'sml-proc
105    "*Controls when emacs uses temporary files to communicate with ML.    :type '(string))
106  If not a number (e.g., NIL), then emacs always sends text directly to  
107  the subprocess. If an integer N, then emacs uses a temporary file  (defcustom sml-default-arg ""
108  whenever the text is longer than N chars. `sml-temp-file' contains the    "*Default command line option to pass, if any."
109  name of the temporary file for communicating. See variable    :group 'sml-proc
110  `sml-use-command' and function `sml-send-region'.    :type '(string))
111    
112  Sending regions directly through the pty (not using temp files)  (defcustom sml-host-name ""
113  doesn't work very well -- e.g., SML/NJ nor Poly/ML incorrectly report    "*Host on which to run ML."
114  the line # of errors occurring in std_in.")    :group 'sml-proc
115      :type '(string))
116  (defvar sml-temp-file  
117    (make-temp-name  (defcustom sml-config-file "~/.smlproc.sml"
118     (concat (file-name-as-directory (or (getenv "TMPDIR") "/tmp")) "/ml"))    "*File that should be fed to the ML process when started."
119    "*Temp file that emacs uses to communicate with the ML process.    :group 'sml-proc
120  See `sml-temp-threshold'. Defaults to \(make-temp-name \"/tmp/ml\"\)")    :type '(string))
121    
122    (defcustom sml-compile-command "CM.make()"
123      "The command used by default by `sml-compile'.
124    See also `sml-compile-commands-alist'.")
125    
126    (defcustom sml-compile-commands-alist
127      '(("CMB.make()" . "all-files.cm")
128        ("CMB.make()" . "pathconfig")
129        ("CM.make()" . "sources.cm")
130        ("use \"load-all\"" . "load-all"))
131      "*Commands used by default by `sml-compile'.
132    Each command is associated with its \"main\" file.
133    It is perfectly OK to associate several files with a command or several
134    commands with the same file.")
135    
136  (defvar inferior-sml-mode-hook nil  (defvar inferior-sml-mode-hook nil
137    "*This hook is run when the inferior ML process is started.    "*This hook is run when the inferior ML process is started.
138  All buffer local customisations for the interaction buffers go here.")  All buffer local customisations for the interaction buffers go here.")
139    
140  (defvar inferior-sml-load-hook nil  (defvar sml-error-overlay nil
141    "*Hook run when inferior-sml-mode (sml-proc.el) is loaded into Emacs.    "*Non-nil means use an overlay to highlight errorful code in the buffer.
142  This is a good place to put your preferred key bindings.")  The actual value is the name of a face to use for the overlay.
143    Instead of setting this variable to 'region, you can also simply keep
144    it NIL and use (transient-mark-mode) which will provide similar
145    benefits (but with several side effects).")
146    
147  (defvar sml-buffer nil  (defvar sml-buffer nil
148    "*The current ML process buffer.    "*The current ML process buffer.
149    
150  MULTIPLE PROCESS SUPPORT (Whoever wants multi-process support anyway?)  MULTIPLE PROCESS SUPPORT (Whoever wants multi-process support anyway?)
151  =====================================================================  =====================================================================
152  sml-mode supports, in a fairly simple fashion, running multiple ML  `sml-mode' supports, in a fairly simple fashion, running multiple ML
153  processes. To run multiple ML processes, you start the first up with  processes. To run multiple ML processes, you start the first up with
154  \\[sml]. It will be in a buffer named *sml*. Rename this buffer with  \\[sml]. It will be in a buffer named *sml*. Rename this buffer with
155  \\[rename-buffer]. You may now start up a new process with another  \\[rename-buffer]. You may now start up a new process with another
# Line 187  Line 177 
177    the process attached to buffer `sml-buffer'.    the process attached to buffer `sml-buffer'.
178    
179  This process selection is performed by function `sml-proc' which looks  This process selection is performed by function `sml-proc' which looks
180  at the value of `sml-buffer' -- which must be a lisp buffer object, or  at the value of `sml-buffer' -- which must be a Lisp buffer object, or
181  a string \(or nil\).  a string \(or nil\).
182    
183  Whenever \\[sml] fires up a new process, it resets `sml-buffer' to be  Whenever \\[sml] fires up a new process, it resets `sml-buffer' to be
# Line 211  Line 201 
201  The format specifier \"%s\" will be converted into the directory name  The format specifier \"%s\" will be converted into the directory name
202  specified when running the command \\[sml-cd].")  specified when running the command \\[sml-cd].")
203    
204  (defvar sml-prompt-regexp "^[\-=] *"  (defcustom sml-prompt-regexp "^[-=>#] *"
205    "*Regexp used to recognise prompts in the inferior ML process.")    "*Regexp used to recognise prompts in the inferior ML process."
206      :group 'sml-proc
207  (defvar sml-error-parser 'sml-smlnj-error-parser    :type '(regexp))
208    "*This function parses an error message into a 3-5 element list:  
209    (defvar sml-error-regexp-alist
210      \(file start-line start-col end-line-col err-msg\).    '(;; Poly/ML messages
211        ("\\(Error\\|Warning:\\) in '\\(.+\\)', line \\([0-9]+\\)" 2 3)
212  The first three components are required by `sml-next-error', but the other      ;; Moscow ML
213  two are optional. If the file associated with the input is the standard      ("File \"\\([^\"]+\\)\", line \\([0-9]+\\)\\(-\\([0-9]+\\)\\)?, characters \\([0-9]+\\)-\\([0-9]+\\):" 1 2 5)
214  input stream, this function should probably return      ;; SML/NJ:  the file-pattern is anchored to avoid
215        ;; pathological behavior with very long lines.
216      \(\"std_in\" start-line start-col\).      ("^[-= ]*\\(.+\\):\\([0-9]+\\)\\.\\([0-9]+\\)\\(-\\([0-9]+\\)\\.\\([0-9]+\\)\\)? \\(Error\\|Warning\\): .*" 1 sml-make-error 2 3 5 6)
217        ;; SML/NJ's exceptions:  see above.
218  This function will be called in a context in which the match data \(see      ("^ +\\(raised at: \\)?\\(.+\\):\\([0-9]+\\)\\.\\([0-9]+\\)\\(-\\([0-9]+\\)\\.\\([0-9]+\\)\\)" 2 sml-make-error 3 4 6 7))
219  `match-data'\) are current for `sml-error-regexp'. The mode sets the    "Alist that specifies how to match errors in compiler output.
220  default value to the function `sml-smlnj-error-parser'.  See `compilation-error-regexp-alist' for a description of the format.")
   
 In a step towards greater sml-mode modularity END-LINE-COL can be either  
   
   - the symbol nil \(in which case it is ignored\)  
   
 or  
   
   - an Emacs Lisp expression that when `eval'd at \(start-line,start-col\)  
     will move point to the end of the errorful text in the file.  
   
 Note that the compiler should return the full path name of the errorful  
 file, and that this might require you to fiddle with the compiler's  
 prettyprinting switches.")  
   
 ;; std_in:2.1-4.3 Error: operator and operand don't agree (tycon mismatch)  
 ;; std_in:2.1 Error: operator and operand don't agree (tycon mismatch)  
   
 (defconst sml-smlnj-error-regexp  
   (concat  
    "^[-= ]*\\(.+\\):"                     ;file name  
    "\\([0-9]+\\)\\.\\([0-9]+\\)"          ;start line.column  
    "\\(-\\([0-9]+\\)\\.\\([0-9]+\\)\\)?"  ;end line.colum  
    ".+\\(\\(Error\\|Warning\\): .*\\)")   ;the message  
   
   "Default regexp matching SML/NJ error and warning messages.  
   
 There should be no need to customise this, though you might decide  
 that you aren't interested in Warnings -- my advice would be to modify  
 `sml-error-regexp' explicitly to do that though.  
   
 If you do customise `sml-smlnj-error-regexp' you may need to modify  
 the function `sml-smlnj-error-parser' (qv).")  
   
 (defvar sml-error-regexp sml-smlnj-error-regexp  
   "*Regexp for matching \(the start of\) an error message.")  
221    
222  ;; font-lock support  ;; font-lock support
223  (defvar inferior-sml-font-lock-keywords  (defconst inferior-sml-font-lock-keywords
224    `((,(concat "\\(" sml-prompt-regexp "\\)\\(.*\\)")    `(;; prompt and following interactive command
225        (,(concat "\\(" sml-prompt-regexp "\\)\\(.*\\)")
226       (1 font-lock-prompt-face)       (1 font-lock-prompt-face)
227       (2 font-lock-command-face keep))       (2 font-lock-command-face keep))
228      (,sml-error-regexp . font-lock-warning-face)      ;; CM's messages
229      ("^\\[\\(.*GC #.*\n\\)*.*\\]" . font-lock-comment-face)      ("^\\[\\(.*GC #.*\n\\)*.*\\]" . font-lock-comment-face)
230      ("^GC #.*" . font-lock-comment-face)))      ;; SML/NJ's irritating GC messages
231        ("^GC #.*" . font-lock-comment-face)
232        ;; error messages
233        ,@(mapcar (lambda (ra) (cons (car ra) 'font-lock-warning-face))
234                  sml-error-regexp-alist))
235      "Font-locking specification for inferior SML mode.")
236    
237    (defface font-lock-prompt-face
238      '((t (:bold t)))
239      "Font Lock mode face used to highlight prompts."
240      :group 'font-lock-highlighting-faces)
241    (defvar font-lock-prompt-face 'font-lock-prompt-face
242      "Face name to use for prompts.")
243    
244    (defface font-lock-command-face
245      '((t (:bold t)))
246      "Font Lock mode face used to highlight interactive commands."
247      :group 'font-lock-highlighting-faces)
248    (defvar font-lock-command-face 'font-lock-command-face
249      "Face name to use for interactive commands.")
250    
251  ;; default faces values  (defconst inferior-sml-font-lock-defaults
 (defvar font-lock-prompt-face  
   (if (facep 'font-lock-prompt-face)  
       'font-lock-prompt-face  
     'font-lock-keyword-face))  
 (defvar font-lock-command-face  
   (if (facep 'font-lock-command-face)  
       'font-lock-command-face  
     'font-lock-function-name-face))  
   
 (defvar inferior-sml-font-lock-defaults  
252    '(inferior-sml-font-lock-keywords nil nil nil nil))    '(inferior-sml-font-lock-keywords nil nil nil nil))
253    
 (defun sml-smlnj-error-parser (pt)  
  "This parses the SML/NJ error message at PT into a 5 element list  
   
     \(file start-line start-col end-of-err msg\)  
   
 where FILE is the file in which the error occurs\; START-LINE is the line  
 number in the file where the error occurs\; START-COL is the character  
 position on that line where the error occurs.  
   
 If present, the fourth return value is a simple Emacs Lisp expression that  
 will move point to the end of the errorful text, assuming that point is at  
 \(start-line,start-col\) to begin with\; and MSG is the text of the error  
 message given by the compiler."  
   
  ;; This function uses `sml-smlnj-error-regexp' to do the parsing, and  
  ;; assumes that regexp groups 1, 2, and 3 correspond to the first three  
  ;; elements of the list returned\; and groups 5, 6 and 7 correspond to the  
  ;; optional elements in that order.  
   
  (save-excursion  
    (goto-char pt)  
    (if (not (looking-at sml-smlnj-error-regexp))  
        ;; the user loses big time.  
        (list nil nil nil)  
      (let ((file (match-string 1))                  ; the file  
            (slin (string-to-int (match-string 2)))  ; the start line  
            (scol (string-to-int (match-string 3)))  ; the start col  
            (msg (if (match-beginning 7) (match-string 7))))  
        ;; another loss: buggy sml/nj's produce nonsense like file:0.0 Error  
        (if (zerop slin) (list file nil scol)  
          ;; ok, was a range of characters mentioned?  
          (if (match-beginning 4)  
              ;; assume m-b 4 implies m-b 5 and m-b 6 (sml-smlnj-error-regexp)  
              (let* ((elin (string-to-int (match-string 5))) ; end line  
                     (ecol (string-to-int (match-string 6))) ; end col  
                     (jump (if (= elin slin)  
                               ;; move forward on the same line  
                               `(forward-char ,(1+ (- ecol scol)))  
                             ;; otherwise move down, and over to ecol  
                             `(progn  
                                (forward-line ,(- elin slin))  
                                (forward-char ,ecol)))))  
                ;; nconc glues lists together. jump & msg aren't lists  
                (nconc (list file slin scol) (list jump) (list msg)))  
            (nconc (list file slin scol) (list nil) (list msg))))))))  
   
 (defun sml-smlnj (pfx)  
    "Set up and run Standard ML of New Jersey.  
 Prefix argument means accept the defaults below.  
   
 Note: defaults set here will be clobbered if you setq them in the  
 inferior-sml-mode-hook.  
   
  sml-program-name  <option> \(default \"sml\"\)  
  sml-default-arg   <option> \(default \"\"\)  
  sml-use-command   \"use \\\"%s\\\"\"  
  sml-cd-command    \"OS.FileSys.chDir \\\"%s\\\"\"  
  sml-prompt-regexp \"^[\\-=] *\"  
  sml-error-regexp  sml-sml-nj-error-regexp  
  sml-error-parser  'sml-sml-nj-error-parser"  
    (interactive "P")  
    (let ((cmd (if pfx "sml"  
                 (read-string "Command name: " sml-program-name)))  
          (arg (if pfx ""  
                 (read-string "Any arguments or options (default none): "))))  
      ;; sml-mode global variables  
      (setq sml-program-name cmd)  
      (setq sml-default-arg  arg)  
      ;; buffer-local (compiler-local) variables  
      (setq-default sml-use-command   "use \"%s\""  
                    sml-cd-command    "OS.FileSys.chDir \"%s\""  
                    sml-prompt-regexp "^[\-=] *"  
                    sml-error-regexp  sml-smlnj-error-regexp  
                    sml-error-parser  'sml-smlnj-error-parser)  
      (sml-run cmd sml-default-arg)))  
   
254    
255  ;;; CODE  ;;; CODE
256    
257  (defvar inferior-sml-mode-map nil)  (defmap inferior-sml-mode-map
258      '(("\C-c\C-s" . run-sml)
259        ("\t"       . comint-dynamic-complete))
260      "Keymap for inferior-sml mode"
261      :inherit (list sml-bindings comint-mode-map)
262      :group 'sml-proc)
263    
264    
265  ;; buffer-local  ;; buffer-local
266    
267  (defvar sml-error-file nil)             ; file from which the last error came  (defvar sml-temp-file nil)
268  (defvar sml-real-file nil)              ; used for finding source errors  ;;(defvar sml-error-file nil)             ; file from which the last error came
269  (defvar sml-error-cursor nil)           ;   ditto  (defvar sml-error-cursor nil)           ;   ditto
 (defvar sml-error-barrier nil)          ;   ditto  
270    
271  (defun sml-proc-buffer ()  (defun sml-proc-buffer ()
272    "Returns the current ML process buffer,    "Return the current ML process buffer.
273  or the current buffer if it is in `inferior-sml-mode'. Raises an error  or the current buffer if it is in `inferior-sml-mode'. Raises an error
274  if the variable `sml-buffer' does not appear to point to an existing  if the variable `sml-buffer' does not appear to point to an existing
275  buffer."  buffer."
276    (let ((buffer    (or (and (eq major-mode 'inferior-sml-mode) (current-buffer))
277           (cond ((eq major-mode 'inferior-sml-mode)        (and sml-buffer
278                  ;; default to current buffer if it's in inferior-sml-mode             (let ((buf (get-buffer sml-buffer)))
                 (current-buffer))  
                ((bufferp sml-buffer)  
279                 ;; buffer-name returns nil if the buffer has been killed                 ;; buffer-name returns nil if the buffer has been killed
280                  (buffer-name sml-buffer))               (and buf (buffer-name buf) buf)))
281                 ((stringp sml-buffer)        ;; no buffer found, make a new one
282                  ;; get-buffer returns nil if there's no buffer of that name        (call-interactively 'run-sml)))
                 (get-buffer sml-buffer)))))  
     (or buffer  
         (error "No current process buffer. See variable sml-buffer"))))  
   
 (defun sml-proc ()  
   "Returns the current ML process. See variable `sml-buffer'."  
   (let ((proc (get-buffer-process (sml-proc-buffer))))  
     (or proc  
         (error "No current process. See variable sml-buffer"))))  
283    
284  (defun sml-buffer (echo)  (defun sml-buffer (echo)
285    "Make the current buffer the current `sml-buffer' if that is sensible.    "Make the current buffer the current `sml-buffer' if that is sensible.
286  Lookup variable `sml-buffer' to see why this might be useful."  Lookup variable `sml-buffer' to see why this might be useful.
287    If prefix argument ECHO is set, then it only reports on the current state."
288    (interactive "P")    (interactive "P")
289    (let ((current    (when (not echo)
290           (cond ((bufferp sml-buffer) (or (buffer-name sml-buffer) "undefined"))      (setq sml-buffer
291                 ((stringp sml-buffer) sml-buffer)            (if (eq major-mode 'inferior-sml-mode) (current-buffer)
292                 (t "undefined"))))              (read-buffer "Set ML process buffer to: " nil t))))
293    (if echo (message (format "ML process buffer is %s." current))    (message "ML process buffer is now %s."
294      (let ((buffer (if (eq major-mode 'inferior-sml-mode) (current-buffer))))             (or (ignore-errors (buffer-name (get-buffer sml-buffer)))
295        (if (not buffer) (message (format "ML process buffer is %s." current))                 "undefined")))
         (setq sml-buffer buffer)  
         (message (format "ML process buffer is %s." (buffer-name buffer))))))))  
   
 (defun sml-noproc ()  
   "Nil iff `sml-proc' returns a process."  
   (condition-case nil (progn (sml-proc) nil) (error t)))  
   
 (defun sml-proc-tidy ()  
   "Something to add to `kill-emacs-hook' to tidy up tmp files on exit."  
   (if (file-readable-p sml-temp-file)  
       (delete-file sml-temp-file)))  
296    
297  (defun inferior-sml-mode ()  (defun sml-proc ()
298      "Return the current ML process.  See variable `sml-buffer'."
299      (assert (eq major-mode 'inferior-sml-mode))
300      (or (get-buffer-process (current-buffer))
301          (progn (call-interactively 'run-sml)
302                 (get-buffer-process (current-buffer)))))
303    
304    (define-derived-mode inferior-sml-mode comint-mode "Inferior-SML"
305    "Major mode for interacting with an inferior ML process.    "Major mode for interacting with an inferior ML process.
306    
307  The following commands are available:  The following commands are available:
# Line 446  Line 326 
326  `sml-prompt-regexp' (default \"^[\\-=] *\")  `sml-prompt-regexp' (default \"^[\\-=] *\")
327      Regexp used to recognise prompts in the inferior ML process.      Regexp used to recognise prompts in the inferior ML process.
328    
 `sml-temp-threshold' (default 0)  
     Controls when emacs uses temporary files to communicate with ML.  
     If an integer N, then emacs uses a temporary file whenever the  
     text is longer than N chars.  
   
 `sml-temp-file' (default (make-temp-name \"/tmp/ml\"))  
     Temp file that emacs uses to communicate with the ML process.  
   
 `sml-error-regexp'  
    (default -- complicated)  
     Regexp for matching error messages from the compiler.  
   
 `sml-error-parser' (default 'sml-smlnj-error-parser)  
     This function parses a error messages into a 3, 4 or 5 element list:  
     (file start-line start-col (end-line end-col) err-msg).  
   
329  You can send text to the inferior ML process from other buffers containing  You can send text to the inferior ML process from other buffers containing
330  ML source.  ML source.
331      `switch-to-sml' switches the current buffer to the ML process buffer.      `switch-to-sml' switches the current buffer to the ML process buffer.
# Line 481  Line 345 
345      to the end of the process' output, and sends it.      to the end of the process' output, and sends it.
346  DEL converts tabs to spaces as it moves back.  DEL converts tabs to spaces as it moves back.
347  TAB file name completion, as in shell-mode, etc.."  TAB file name completion, as in shell-mode, etc.."
   (interactive)  
   (kill-all-local-variables)  
   (comint-mode)  
348    (setq comint-prompt-regexp sml-prompt-regexp)    (setq comint-prompt-regexp sml-prompt-regexp)
349    (sml-mode-variables)    (sml-mode-variables)
350    
351    ;; For sequencing through error messages:    ;; For sequencing through error messages:
352      (set (make-local-variable 'sml-error-cursor) (point-max-marker))
353    (set (make-local-variable 'sml-error-cursor)    (set-marker-insertion-type sml-error-cursor nil)
        (marker-position (point-max-marker)))  
   (set (make-local-variable 'sml-error-barrier)  
        (marker-position (point-max-marker)))  
   (set (make-local-variable 'sml-real-file) (cons nil 0))  
354    (set (make-local-variable 'font-lock-defaults)    (set (make-local-variable 'font-lock-defaults)
355         inferior-sml-font-lock-defaults)         inferior-sml-font-lock-defaults)
356    
357    (make-local-variable 'sml-use-command)    ;; compilation support (used for next-error)
358    (make-local-variable 'sml-cd-command)    (set (make-local-variable 'compilation-error-regexp-alist)
359    (make-local-variable 'sml-prompt-regexp)         sml-error-regexp-alist)
360    (make-local-variable 'sml-error-parser)    (compilation-minor-mode 1)
361    (make-local-variable 'sml-error-regexp)    ;; eliminate compilation-minor-mode's map since its Mouse-2 binding
362      ;; is just too unbearable.
363    (setq major-mode 'inferior-sml-mode)    (add-to-list 'minor-mode-overriding-map-alist
364    (setq mode-name "Inferior ML")                 (cons 'compilation-minor-mode (make-sparse-keymap)))
365    (setq mode-line-process '(": %s"))    ;; I'm sure people might kill me for that
366    (use-local-map inferior-sml-mode-map)    (setq compilation-error-screen-columns nil)
367    (add-hook 'kill-emacs-hook 'sml-proc-tidy)    (make-local-variable 'sml-endof-error-alist)
368      ;;(make-local-variable 'sml-error-overlay)
369    
370    (run-hooks 'inferior-sml-mode-hook))    (setq mode-line-process '(": %s")))
371    
372  ;;; FOR RUNNING ML FROM EMACS  ;;; FOR RUNNING ML FROM EMACS
373    
374  ;;;###autoload  ;;;###autoload
375  (defun run-sml (&optional pfx)  (autoload 'run-sml "sml-proc" nil t)
376    "Run an inferior ML process, input and output via buffer *sml*.  (defalias 'run-sml 'sml-run)
377  With a prefix argument, this command allows you to specify any command  (defun sml-run (cmd arg &optional host)
378  line options to pass to the complier. The command runs hook functions    "Run the program CMD with given arguments ARG.
379  on `comint-mode-hook' and `inferior-sml-mode-hook' in that order.  The command is run in buffer *CMD* using mode `inferior-sml-mode'.
380    If the buffer already exists and has a running process, then
381  If there is a process already running in *sml*, just switch to that  just go to this buffer.
382  buffer instead.  
383    This updates `sml-buffer' to the new buffer.
384  In fact the name of the buffer created is chosen to reflect the name  You can have several inferior M(or L process running, but only one (> s
 of the program name specified by `sml-program-name', or entered at the  
 prompt. You can have several inferior ML process running, but only one  
385  current one -- given by `sml-buffer' (qv).  current one -- given by `sml-buffer' (qv).
386    
387    If a prefix argument is used, the user is also prompted for a HOST
388    on which to run CMD using `remote-shell-program'.
389    
390  \(Type \\[describe-mode] in the process buffer for a list of commands.)"  \(Type \\[describe-mode] in the process buffer for a list of commands.)"
391    (interactive "P")    (interactive
392    (let ((cmd (if pfx     (list
393                   (read-string "ML command: " sml-program-name)                   (read-string "ML command: " sml-program-name)
394                 sml-program-name))      (if (or current-prefix-arg (> (length sml-default-arg) 0))
         (args (if pfx  
395                    (read-string "Any args: " sml-default-arg)                    (read-string "Any args: " sml-default-arg)
396                  sml-default-arg)))        sml-default-arg)
397      (sml-run cmd args)))      (if (or current-prefix-arg (> (length sml-host-name) 0))
398            (read-string "On host: " sml-host-name)
399  (defun sml-run (cmd arg)        sml-host-name)))
   "Run the ML program CMD with given arguments ARGS.  
 This usually updates `sml-buffer' to a buffer named *CMD*."  
400    (let* ((pname (file-name-nondirectory cmd))    (let* ((pname (file-name-nondirectory cmd))
401           (bname (format "*%s*" pname))           (args (if (equal arg "") () (split-string arg)))
402           (args (if (equal arg "") () (sml-args-to-list arg))))           (file (when (and sml-config-file (file-exists-p sml-config-file))
403      (if (comint-check-proc bname)                   sml-config-file)))
         (pop-to-buffer (sml-proc-buffer)) ;do nothing but switch buffer  
       (setq sml-buffer  
             (if (null args)  
                 ;; there is a good reason for this; to ensure  
                 ;; *no* argument is sent, not even a "".  
                 (set-buffer (apply 'make-comint pname cmd nil))  
               (set-buffer (apply 'make-comint pname cmd nil args))))  
       (message (format "Starting \"%s\" in background." pname))  
       (inferior-sml-mode)  
       (goto-char (point-max))  
404        ;; and this -- to keep these as defaults even if        ;; and this -- to keep these as defaults even if
405        ;; they're set in the mode hooks.        ;; they're set in the mode hooks.
406        (setq sml-program-name cmd)        (setq sml-program-name cmd)
407        (setq sml-default-arg arg))))      (setq sml-default-arg arg)
408        (setq sml-host-name host)
409        ;; For remote execution, use `remote-shell-program'
410        (when (> (length host) 0)
411          (setq args (list* host "cd" default-directory ";" cmd args))
412          (setq cmd remote-shell-program))
413        ;; go for it
414        (setq sml-buffer (apply 'make-comint pname cmd file args))
415    
416  (defun sml-args-to-list (string)      (pop-to-buffer sml-buffer)
417    (let ((where (string-match "[ \t]" string)))      ;;(message (format "Starting \"%s\" in background." pname))
418      (cond ((null where) (list string))      (inferior-sml-mode)
419            ((not (= where 0))      (goto-char (point-max))
420             (cons (substring string 0 where)      sml-buffer))
                  (sml-args-to-list (substring string (+ 1 where)  
                                               (length string)))))  
           (t (let ((pos (string-match "[^ \t]" string)))  
                (if (null pos)  
                    nil  
                    (sml-args-to-list (substring string pos  
                                                 (length string)))))))))  
   
 (defun sml-temp-threshold (&optional thold)  
   "Set the variable to the given prefix (nil, if no prefix given).  
 This is really mainly here to help debugging sml-mode!"  
   (interactive "P")  
   (setq sml-temp-threshold  
         (if current-prefix-arg (prefix-numeric-value thold)))  
   (message "%s" sml-temp-threshold))  
421    
422  ;;;###autoload  (defun switch-to-sml (eobp)
 (defun switch-to-sml (eob-p)  
423    "Switch to the ML process buffer.    "Switch to the ML process buffer.
424  With prefix argument, positions cursor at point, otherwise at end of buffer."  Move point to the end of buffer unless prefix argument EOBP is set."
425    (interactive "P")    (interactive "P")
   (if (sml-noproc) (save-excursion (run-sml t)))  
426    (pop-to-buffer (sml-proc-buffer))    (pop-to-buffer (sml-proc-buffer))
427    (cond ((not eob-p)    (unless eobp
428           (push-mark (point) t)           (push-mark (point) t)
429           (goto-char (point-max)))))      (goto-char (point-max))))
430    
431  ;; Fakes it with a "use <temp-file>;" if necessary.  ;; Fakes it with a "use <temp-file>;" if necessary.
432    
 ;;;###autoload  
433  (defun sml-send-region (start end &optional and-go)  (defun sml-send-region (start end &optional and-go)
434    "Send current region to the inferior ML process.    "Send current region START..END to the inferior ML process.
435  Prefix argument means switch-to-sml afterwards.  Prefix AND-GO argument means switch-to-sml afterwards.
436    
437  If the region is longer than `sml-temp-threshold' and the variable  The region is written out to a temporary file and a \"use <temp-file>\" command
438  `sml-use-command' is defined, the region is written out to a temporary file  is sent to the compiler.
439  and a \"use <temp-file>\" command is sent to the compiler\; otherwise the  See variables `sml-use-command'."
 text in the region is sent directly to the compiler. In either case a  
 trailing \"\;\\n\" will be added automatically.  
   
 See variables `sml-temp-threshold', `sml-temp-file' and `sml-use-command'."  
440    (interactive "r\nP")    (interactive "r\nP")
441    (if (sml-noproc) (save-excursion (run-sml t)))    (if (= start end)
442    (cond ((equal start end)        (message "The region is zero (ignored)")
443           (message "The region is zero (ignored)"))      (let* ((buf (sml-proc-buffer))
444          ((and sml-use-command             (file (buffer-file-name))
445                (numberp sml-temp-threshold)             (marker (copy-marker start))
446                (< sml-temp-threshold (- end start)))             (tmp (make-temp-file "sml")))
447           ;; Just in case someone is still reading from sml-temp-file:        (write-region start end tmp nil 'silently)
448           (if (file-exists-p sml-temp-file)        (with-current-buffer buf
449               (delete-file sml-temp-file))          (when sml-temp-file
450           (write-region start end sml-temp-file nil 'silently)            (ignore-errors (delete-file (car sml-temp-file)))
451           (sml-update-barrier (buffer-file-name (current-buffer)) start)            (set-marker (cdr sml-temp-file) nil))
452           (sml-update-cursor (sml-proc-buffer))          (setq sml-temp-file (cons tmp marker))
453           (comint-send-string (sml-proc)          (sml-send-string (format sml-use-command tmp) nil and-go)))))
                  (concat (format sml-use-command sml-temp-file) ";\n")))  
         (t  
          (comint-send-region (sml-proc) start end)  
          (comint-send-string (sml-proc) ";\n")))  
   (if and-go (switch-to-sml nil)))  
   
 ;; Update the buffer-local variables sml-real-file and sml-error-barrier  
 ;; in the process buffer:  
   
 (defun sml-update-barrier (file pos)  
   (let ((buf (current-buffer)))  
     (unwind-protect  
         (let* ((proc (sml-proc))  
                (pmark (marker-position (process-mark proc))))  
           (set-buffer (process-buffer proc))  
           ;; update buffer local variables  
           (setq sml-real-file (and file (cons file pos)))  
           (setq sml-error-barrier pmark))  
       (set-buffer buf))))  
   
 ;; Update the buffer-local error-cursor in proc-buffer to be its  
 ;; current proc mark.  
   
 (defun sml-update-cursor (proc-buffer)  ;always= sml-proc-buffer  
   (let ((buf (current-buffer)))  
     (unwind-protect  
         (let* ((proc (sml-proc))        ;just in case?  
                (pmark (marker-position (process-mark proc))))  
           (set-buffer proc-buffer)  
           ;; update buffer local variable  
           (setq sml-error-cursor pmark))  
       (set-buffer buf))))  
454    
455  ;; This is quite bogus, so it isn't bound to a key by default.  ;; This is quite bogus, so it isn't bound to a key by default.
456  ;; Anyone coming up with an algorithm to recognise fun & local  ;; Anyone coming up with an algorithm to recognise fun & local
# Line 659  Line 458 
458    
459  (defun sml-send-function (&optional and-go)  (defun sml-send-function (&optional and-go)
460    "Send current paragraph to the inferior ML process.    "Send current paragraph to the inferior ML process.
461  With a prefix argument switch to the sml buffer as well  With a prefix argument AND-GO switch to the sml buffer as well
462  \(cf. `sml-send-region'\)."  \(cf. `sml-send-region'\)."
463    (interactive "P")    (interactive "P")
464    (save-excursion    (save-excursion
# Line 667  Line 466 
466      (sml-send-region (point) (mark)))      (sml-send-region (point) (mark)))
467    (if and-go (switch-to-sml nil)))    (if and-go (switch-to-sml nil)))
468    
469  ;;;###autoload  (defvar sml-source-modes '(sml-mode)
470      "*Used to determine if a buffer contains ML source code.
471    If it's loaded into a buffer that is in one of these major modes, it's
472    considered an ML source file by `sml-load-file'.  Used by these commands
473    to determine defaults.")
474    
475  (defun sml-send-buffer (&optional and-go)  (defun sml-send-buffer (&optional and-go)
476    "Send buffer to inferior shell running ML process.    "Send buffer to inferior shell running ML process.
477  With a prefix argument switch to the sml buffer as well  With a prefix argument AND-GO switch to the sml buffer as well
478  \(cf. `sml-send-region'\)."  \(cf. `sml-send-region'\)."
479    (interactive "P")    (interactive "P")
480    (if (memq major-mode sml-source-modes)    (if (memq major-mode sml-source-modes)
# Line 681  Line 485 
485  ;; bind if she wishes, since its easier to type C-c r than C-u C-c C-r.  ;; bind if she wishes, since its easier to type C-c r than C-u C-c C-r.
486    
487  (defun sml-send-region-and-go (start end)  (defun sml-send-region-and-go (start end)
488    "Send current region to the inferior ML process, and go there."    "Send current region START..END to the inferior ML process, and go there."
489    (interactive "r")    (interactive "r")
490    (sml-send-region start end t))    (sml-send-region start end t))
491    
# Line 690  Line 494 
494    (interactive)    (interactive)
495    (sml-send-function t))    (sml-send-function t))
496    
   
 ;;; Mouse control and handling dedicated frames for Inferior ML  
   
 ;; simplified from frame.el in Emacs: special-display-popup-frame...  
   
 (defun sml-proc-frame ()  
   "Returns the current ML process buffer's frame, or creates one first."  
   (let ((buffer (sml-proc-buffer)))  
     (window-frame (display-buffer buffer))))  
   
 ;;(defun sml-pop-to-buffer (warp)  
 ;;  "(Towards) handling multiple frames properly.  
 ;;Raises the frame, and warps the mouse over there, only if WARP is non-nil."  
 ;;  (let ((current (window-frame (selected-window)))  
 ;;        (buffer  (sml-proc-buffer)))  
 ;;    (let ((frame (sml-proc-frame)))  
 ;;      (if (eq current frame)  
 ;;          (pop-to-buffer buffer)           ; stay on the same frame.  
 ;;        (select-frame frame)               ; XEmacs sometimes moves focus.  
 ;;        (select-window (get-buffer-window buffer)) ; necc. for XEmacs  
 ;;        ;; (raise-frame frame)  
 ;;        (if warp (sml-warp-mouse frame))))))  
   
   
497  ;;; H A C K   A T T A C K !   X E M A C S   V E R S U S   E M A C S  ;;; H A C K   A T T A C K !   X E M A C S   V E R S U S   E M A C S
498    
 ;; Only these two functions have to dance around the inane differences  
 ;; between Emacs and XEmacs (fortunately)  
   
 (defun sml-warp-mouse (frame)  
   "Warp the pointer across the screen to upper right corner of FRAME."  
   (raise-frame frame)  
   (cond ((string-match "\\(Lucid\\|XEmacs\\)" emacs-version)  
          ;; LUCID (19.10) or later... set-m-pos needs a WINDOW  
          (set-mouse-position (frame-root-window frame) (1- (frame-width)) 0))  
         (t  
          ;; GNU, post circa 19.19... set-m-pos needs a FRAME  
          (set-mouse-position frame (1- (frame-width)) 0)  
          ;; probably not needed post 19.29  
          (if (fboundp 'unfocus-frame) (unfocus-frame)))))  
   
499  (defun sml-drag-region (event)  (defun sml-drag-region (event)
500    "Highlight the text the mouse is dragged over, and send it to ML.    "Highlight the text the mouse is dragged over, and send it to ML.
501  This must be bound to a button-down mouse event, currently \\[sml-drag-region].  This must be bound to a button-down mouse EVENT, currently \\[sml-drag-region].
502    
503  If you drag the mouse (ie, keep the mouse button depressed) the  If you drag the mouse (ie, keep the mouse button depressed) the
504  program text sent to the complier is delimited by where you started  program text sent to the complier is delimited by where you started
# Line 767  Line 532 
532    
533  ;;; LOADING AND IMPORTING SOURCE FILES:  ;;; LOADING AND IMPORTING SOURCE FILES:
534    
535  (defvar sml-source-modes '(sml-mode)  (defvar sml-prev-dir/file nil
536    "*Used to determine if a buffer contains ML source code.    "Cache for (DIRECTORY . FILE) pair last.
537  If it's loaded into a buffer that is in one of these major modes, it's  Set in `sml-load-file' and `sml-cd' commands.
538  considered an ML source file by `sml-load-file'. Used by these commands  Used to determine the default in the next `ml-load-file'.")
 to determine defaults.")  
   
 (defvar sml-prev-l/c-dir/file nil  
   "Caches the (directory . file) pair used in the last `sml-load-file'  
 or `sml-cd' command. Used for determining the default in the next one.")  
539    
 ;;;###autoload  
540  (defun sml-load-file (&optional and-go)  (defun sml-load-file (&optional and-go)
541    "Load an ML file into the current inferior ML process.    "Load an ML file into the current inferior ML process.
542  With a prefix argument switch to sml buffer as well.  With a prefix argument AND-GO switch to sml buffer as well.
543    
544  This command uses the ML command template `sml-use-command' to construct  This command uses the ML command template `sml-use-command' to construct
545  the command to send to the ML process\; a trailing \"\;\\n\" will be added  the command to send to the ML process\; a trailing \"\;\\n\" will be added
546  automatically."  automatically."
547    (interactive "P")    (interactive "P")
548    (if (sml-noproc) (save-excursion (run-sml t)))    (let ((file (car (comint-get-source
549    (if sml-use-command                      "Load ML file: " sml-prev-dir/file sml-source-modes t))))
550        (let ((file      (with-current-buffer (sml-proc-buffer)
              (car (comint-get-source "Load ML file: " sml-prev-l/c-dir/file  
                                      sml-source-modes t))))  
551          ;; Check if buffer needs saved. Should (save-some-buffers) instead?          ;; Check if buffer needs saved. Should (save-some-buffers) instead?
552          (comint-check-source file)          (comint-check-source file)
553          (setq sml-prev-l/c-dir/file        (setq sml-prev-dir/file
554                (cons (file-name-directory file) (file-name-nondirectory file)))                (cons (file-name-directory file) (file-name-nondirectory file)))
555          (sml-update-cursor (sml-proc-buffer))        (sml-send-string (format sml-use-command file) nil and-go))))
         (comint-send-string  
          (sml-proc) (concat (format sml-use-command file) ";\n")))  
     (message "Can't load files if `sml-use-command' is undefined!"))  
   (if and-go (switch-to-sml nil)))  
556    
557  (defun sml-cd (dir)  (defun sml-cd (dir)
558    "Change the working directory of the inferior ML process.    "Change the working directory of the inferior ML process.
# Line 808  Line 561 
561  be executed to change the compiler's working directory\; a trailing  be executed to change the compiler's working directory\; a trailing
562  \"\;\\n\" will be added automatically."  \"\;\\n\" will be added automatically."
563    (interactive "DSML Directory: ")    (interactive "DSML Directory: ")
564    (let* ((buf (sml-proc-buffer))    (let ((dir (expand-file-name dir)))
565           (proc (get-buffer-process buf))      (with-current-buffer (sml-proc-buffer)
566           (dir (expand-file-name dir))        (sml-send-string (format sml-cd-command dir) t)
567           (string (concat (format sml-cd-command dir) ";\n")))        (setq default-directory dir))
568      (save-excursion      (setq sml-prev-dir/file (cons dir nil))))
569        (set-buffer buf)  
570        (goto-char (point-max))  (defun sml-send-string (str &optional print and-go)
571        (insert string)    (let ((proc (sml-proc))
572        (set-marker (process-mark proc) (point))          (str (concat str ";\n"))
573        (if sml-cd-command (process-send-string proc string))          (win (get-buffer-window (current-buffer) 'visible)))
574        (cd dir))      (when win (select-window win))
     (setq sml-prev-l/c-dir/file (cons dir nil))))  
   
 (defun sml-send-command (cmd &optional dir)  
   "Send string to ML process, display this string in ML's buffer"  
   (if (sml-noproc) (save-excursion (run-sml t)))  
   (let* ((my-dir (or dir (expand-file-name default-directory)))  
          (cd-cmd (if my-dir  
                      (concat (format sml-cd-command my-dir) "; ")  
                    ""))  
          (buf (sml-proc-buffer))  
          (proc (get-buffer-process buf))  
          (string (concat cd-cmd cmd ";\n")))  
     (save-some-buffers t)  
     (save-excursion  
       (sml-update-cursor buf)  
       (set-buffer buf)  
575        (goto-char (point-max))        (goto-char (point-max))
576        (insert string)      (when print (insert str))
577        (if my-dir (cd my-dir))      (sml-update-cursor)
578        (set-marker (process-mark proc) (point))      (set-marker (process-mark proc) (point-max))
579        (process-send-string proc string))      (setq compilation-last-buffer (current-buffer))
580      (switch-to-sml t)))      (comint-send-string proc str)
581        (when and-go (switch-to-sml nil))))
582  (defun sml-make (command)  
583    "re-make a system using (by default) CM.  (defun sml-compile (command)
584     The exact command used can be specified by providing a prefix argument."    "Pass a COMMAND to the SML process to compile the current program.
585    
586    You can then use the command \\[next-error] to find the next error message
587    and move to the source code that caused it.
588    
589    Interactively, prompts for the command if `compilation-read-command' is
590    non-nil.  With prefix arg, always prompts."
591    (interactive    (interactive
592     ;; code taken straight from compile.el     (let* ((dir default-directory)
593     (if (or current-prefix-arg (not sml-make-command))            (cmd "cd \"."))
594         (list (read-from-minibuffer "Compile command: "       ;; look for files to determine the default command
595                                   sml-make-command nil nil       (while (and (stringp dir)
596                                   '(compile-history . 1)))                   (dolist (cf sml-compile-commands-alist 1)
597       (list sml-make-command)))                     (when (file-exists-p (expand-file-name (cdr cf) dir))
598    (setq sml-make-command command)                       (setq cmd (concat cmd "\"; " (car cf))) (return nil))))
   ;; try to find a makefile up the sirectory tree  
   (let ((dir (and sml-make-file-name (expand-file-name default-directory))))  
     (while (and dir (not (file-exists-p (concat dir sml-make-file-name))))  
599        (let ((newdir (file-name-directory (directory-file-name dir))))        (let ((newdir (file-name-directory (directory-file-name dir))))
600          (setq dir (if (equal newdir dir) nil newdir))))           (setq dir (unless (equal newdir dir) newdir))
601      (sml-send-command command dir)))           (setq cmd (concat cmd "/.."))))
602         (setq cmd
603               (cond
604                ((local-variable-p 'sml-compile-command) sml-compile-command)
605                ((string-match "^\\s-*cd\\s-+\"\\.\"\\s-*;\\s-*" cmd)
606                 (substring cmd (match-end 0)))
607                ((string-match "^\\s-*cd\\s-+\"\\(\\./\\)" cmd)
608                 (replace-match "" t t cmd 1))
609                ((string-match ";" cmd) cmd)
610                (t sml-compile-command)))
611         ;; code taken from compile.el
612         (if (or compilation-read-command current-prefix-arg)
613             (list (read-from-minibuffer "Compile command: "
614                                         cmd nil nil '(compile-history . 1)))
615           (list cmd))))
616         ;; ;; now look for command's file to determine the directory
617         ;; (setq dir default-directory)
618         ;; (while (and (stringp dir)
619         ;;             (dolist (cf sml-compile-commands-alist t)
620         ;;               (when (and (equal cmd (car cf))
621         ;;                          (file-exists-p (expand-file-name (cdr cf) dir)))
622         ;;                 (return nil))))
623         ;;   (let ((newdir (file-name-directory (directory-file-name dir))))
624         ;;     (setq dir (unless (equal newdir dir) newdir))))
625         ;; (setq dir (or dir default-directory))
626         ;; (list cmd dir)))
627      (set (make-local-variable 'sml-compile-command) command)
628      (save-some-buffers (not compilation-ask-about-save) nil)
629      (let ((dir default-directory))
630        (when (string-match "^\\s-*cd\\s-+\"\\([^\"]+\\)\"\\s-*;" command)
631          (setq dir (match-string 1 command))
632          (setq command (replace-match "" t t command)))
633        (setq dir (expand-file-name dir))
634        (with-current-buffer (sml-proc-buffer)
635          (setq default-directory dir)
636          (sml-send-string (concat (format sml-cd-command dir) "; " command) t t))))
637    
638  ;;; PARSING ERROR MESSAGES  ;;; PARSING ERROR MESSAGES
639    
640  ;; This should need no modification to support other compilers.  ;; This should need no modification to support other compilers.
641    
642  ;;;###autoload  ;; Update the buffer-local error-cursor in proc-buffer to be its
643  (defun sml-next-error (skip)  ;; current proc mark.
   "Find the next error by parsing the inferior ML buffer.  
 A prefix argument means `sml-skip-errors' (qv) instead.  
   
 Move the error message on the top line of the window\; put the cursor  
 \(point\) at the beginning of the error source.  
   
 If the error message specifies a range, and `sml-error-parser' returns  
 the range, the mark is placed at the end of the range. If the variable  
 `sml-error-overlay' is non-nil, the region will also be highlighted.  
   
 If `sml-error-parser' returns a fifth component this is assumed to be  
 a string to indicate the nature of the error: this will be echoed in  
 the minibuffer.  
   
 Error interaction only works if there is a real file associated with  
 the input -- though of course it also depends on the compiler's error  
 messages \(also see documantation for `sml-error-parser'\).  
   
 However: if the last text sent went via `sml-load-file' (or the temp  
 file mechanism), the next error reported will be relative to the start  
 of the region sent, any error reports in the previous output being  
 forgotten. If the text went directly to the compiler the succeeding  
 error reported will be the next error relative to the location \(in  
 the output\) of the last error. This odd behaviour may have a use...?"  
   (interactive "P")  
   (if skip (sml-skip-errors) (sml-do-next-error)))  
644    
645  (defun sml-bottle (msg)  (defvar sml-endof-error-alist nil)
   "Function to let `sml-next-error' give up gracefully."  
   (sml-warp-mouse (selected-frame))  
   (error msg))  
   
 (defun sml-do-next-error ()  
   "The buisiness end of `sml-next-error' (qv)"  
   (let ((case-fold-search nil)  
         ;; set this variable iff we called sml-next-error in a SML buffer  
         (sml-window (if (memq major-mode sml-source-modes) (selected-window)))  
         (proc-buffer (sml-proc-buffer)))  
     ;; undo (don't destroy) the previous overlay to be tidy  
     (sml-error-overlay 'undo 1 1  
                        (and sml-error-file (get-file-buffer sml-error-file)))  
     ;; go to interaction buffer but don't raise it's frame  
     (pop-to-buffer (sml-proc-buffer))  
     ;; go to the last remembered error, and search for the next one.  
     (goto-char sml-error-cursor)  
     (if (not (re-search-forward sml-error-regexp (point-max) t))  
         ;; no more errors -- move point to the sml prompt at the end  
         (progn  
           (goto-char (point-max))  
           (if sml-window (select-window sml-window)) ;return there, perhaps  
           (message "No error message(s) found."))  
       ;; error found: point is at end of last match; set the cursor posn.  
       (setq sml-error-cursor (point))  
       ;; move the SML window's text up to this line  
       (set-window-start (get-buffer-window proc-buffer) (match-beginning 0))  
       (let* ((pos)  
              (parse (funcall sml-error-parser (match-beginning 0)))  
              (file (nth 0 parse))  
              (line0 (nth 1 parse))  
              (col0 (nth 2 parse))  
              (line/col1 (nth 3 parse))  
              (msg (nth 4 parse)))  
         ;; Give up immediately if the error report is scribble  
         (if (or (null file) (null line0))  
             (sml-bottle "Failed to parse/locate this error properly!"))  
         ;; decide what to do depending on the file returned  
         (if (string= file "std_in")  
             ;; presently a fundamental limitation i'm afraid.  
             (sml-bottle "Sorry, can't locate errors on std_in.")  
           (if (string= file sml-temp-file)  
               ;; errors found in tmp file; seek the real file  
               (if (< (point) sml-error-barrier)  
                   ;; weird. user cleared *sml* and use'd the tmp file?  
                   (sml-bottle "Temp file error report is not current.")  
                 (if (not (car sml-real-file))  
                     ;; sent from a buffer w/o a file attached.  
                     ;; DEAL WITH THIS EVENTUALLY.  
                     (sml-bottle "No real file associated with the temp file.")  
                   ;; real file and error-barrier  
                   (setq file (car sml-real-file))  
                   (setq pos (cdr sml-real-file))))))  
         (if (not (file-readable-p file))  
             (sml-bottle (concat "Can't read " file))  
           ;; instead of (find-file-other-window file) to lookup the file  
           (find-file-other-window file)  
           ;; no good if the buffer's narrowed, still...  
           (goto-char (or pos 1))        ; line 1 if no tmp file  
           (forward-line (1- line0))  
           (forward-char (1- col0))  
           ;; point is at start of error text; seek the end.  
           (let ((start (point))  
                 (end (and line/col1  
                           (condition-case nil  
                               (progn (eval line/col1) (point))  
                             (error nil)))))  
             ;; return to start anyway  
             (goto-char start)  
             ;; if point went to end, put mark there, and maybe highlight  
             (if end (progn (push-mark end t)  
                            (sml-error-overlay nil start end)))  
             (setq sml-error-file file)   ; remember this for next time  
             (if msg (message msg)))))))) ; echo the error/warning message  
646    
647  (defun sml-skip-errors ()  (defun sml-update-cursor ()
648    "Skip past the rest of the errors."    ;; update buffer local variable
649    (interactive)    (set-marker sml-error-cursor (1- (process-mark (sml-proc))))
650    (if (memq major-mode sml-source-modes) (sml-error-overlay 'undo))    (setq sml-endof-error-alist nil)
651    (sml-update-cursor (sml-proc-buffer))    (compilation-forget-errors)
652    (if (eq major-mode 'sml-inferior-mode) (goto-char (point-max))))    (if (markerp compilation-parsing-end)
653          (set-marker compilation-parsing-end sml-error-cursor)
654  ;;; Set up the inferior mode keymap, using sml-mode bindings...      (setq compilation-parsing-end sml-error-cursor)))
655    
656  (cond ((not inferior-sml-mode-map)  (defun sml-make-error (f c)
657         (setq inferior-sml-mode-map (nconc (make-sparse-keymap) comint-mode-map))    (let ((err (point-marker))
658         (install-sml-keybindings inferior-sml-mode-map)          (linenum (string-to-number c))
659         (define-key inferior-sml-mode-map "\C-c\C-s" 'run-sml)          (filename (list (first f) (second f)))
660         (define-key inferior-sml-mode-map "\t"       'comint-dynamic-complete)))          (column (string-to-number (compile-buffer-substring (third f)))))
661        ;; record the end of error, if any
662        (when (fourth f)
663          (let ((endlinestr (compile-buffer-substring (fourth f))))
664            (when endlinestr
665              (let* ((endline (string-to-number endlinestr))
666                     (endcol (string-to-number
667                              (or (compile-buffer-substring (fifth f)) "0")))
668                     (linediff (- endline linenum)))
669                (push (list err linediff (if (= 0 linediff) (- endcol column) endcol))
670                      sml-endof-error-alist)))))
671        ;; build the error descriptor
672        (if (string= (car sml-temp-file) (first f))
673            ;; special case for code sent via sml-send-region
674            (let ((marker (cdr sml-temp-file)))
675              (with-current-buffer (marker-buffer marker)
676                (goto-char marker)
677                (forward-line (1- linenum))
678                (forward-char (1- column))
679                (cons err (point-marker))))
680          ;; taken from compile.el
681          (list err filename linenum column))))
682    
683    (defadvice compilation-goto-locus (after sml-endof-error activate)
684      (let* ((next-error (ad-get-arg 0))
685             (err (car next-error))
686             (pos (cdr next-error))
687             (endof (with-current-buffer (marker-buffer err)
688                      (assq err sml-endof-error-alist))))
689        (if (not endof) (sml-error-overlay 'undo)
690          (with-current-buffer (marker-buffer pos)
691            (goto-char pos)
692            (let ((linediff (second endof))
693                  (coldiff (third endof)))
694              (when (> 0 linediff) (forward-line linediff))
695              (forward-char coldiff))
696            (sml-error-overlay nil pos (point))
697            (push-mark nil t (not sml-error-overlay))
698            (goto-char pos)))))
699    
700    (defun sml-error-overlay (undo &optional beg end)
701      "Move `sml-error-overlay' to the text region in the current buffer.
702    If the buffer-local variable `sml-error-overlay' is
703    non-nil it should be an overlay \(or extent, in XEmacs speak\)\; this
704    function moves the overlay over the current region. If the optional
705    BUFFER argument is given, move the overlay in that buffer instead of
706    the current buffer.
707    
708    Called interactively, the optional prefix argument UNDO indicates that
709    the overlay should simply be removed: \\[universal-argument] \
710    \\[sml-error-overlay]."
711      (interactive "P")
712      (when sml-error-overlay
713        (unless (overlayp sml-error-overlay)
714          (let ((ol sml-error-overlay))
715            (setq sml-error-overlay (make-overlay 0 0))
716            (overlay-put sml-error-overlay 'face (if (symbolp ol) ol 'region))))
717        (if undo (move-overlay sml-error-overlay 1 1 (current-buffer))
718          ;; if active regions, signals mark not active if no region set
719          (let ((beg (or beg (region-beginning)))
720                (end (or end (region-end))))
721            (move-overlay sml-error-overlay beg end (current-buffer))))))
722    
723  ;;; H A C K   A T T A C K !   X E M A C S   /   E M A C S   K E Y S  ;;; H A C K   A T T A C K !   X E M A C S   /   E M A C S   K E Y S
724    
725  (if window-system  ;;(define-key sml-mode-map [(meta shift down-mouse-1)] 'sml-drag-region)
     (cond ((string-match "\\(Lucid\\|XEmacs\\)" emacs-version)  
            ;; LUCID (19.10) or later...  
            (define-key sml-mode-map '(meta shift button1) 'sml-drag-region))  
           (t  
            ;; GNU, post circa 19.19  
            (define-key sml-mode-map [M-S-down-mouse-1] 'sml-drag-region))))  
   
 ;;; ...and do the user's customisations.  
726    
727  (run-hooks 'inferior-sml-load-hook)  (provide 'sml-proc)
728    
729  ;;; Here is where sml-proc.el ends  ;;; sml-proc.el ends here

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