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- ;;; cmuscheme.el --- Scheme process in a buffer. Adapted from tea.el.
-
- ;; Copyright (C) 1988, 1994 Free Software Foundation, Inc.
-
- ;; Author: Olin Shivers <olin.shivers@cs.cmu.edu>
- ;; Maintainer: FSF
- ;; Keywords: processes, lisp
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs 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 Emacs 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., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Commentary:
-
- ;; This is a customisation of comint-mode (see comint.el)
- ;;
- ;; Written by Olin Shivers (olin.shivers@cs.cmu.edu). With bits and pieces
- ;; lifted from scheme.el, shell.el, clisp.el, newclisp.el, cobol.el, et al..
- ;; 8/88
- ;;
- ;; Please send me bug reports, bug fixes, and extensions, so that I can
- ;; merge them into the master source.
- ;;
- ;; The changelog is at the end of this file.
- ;;
- ;; NOTE: MIT Cscheme, when invoked with the -emacs flag, has a special user
- ;; interface that communicates process state back to the superior emacs by
- ;; outputting special control sequences. The gnumacs package, xscheme.el, has
- ;; lots and lots of special purpose code to read these control sequences, and
- ;; so is very tightly integrated with the cscheme process. The cscheme
- ;; interrupt handler and debugger read single character commands in cbreak
- ;; mode; when this happens, xscheme.el switches to special keymaps that bind
- ;; the single letter command keys to emacs functions that directly send the
- ;; character to the scheme process. Cmuscheme mode does *not* provide this
- ;; functionality. If you are a cscheme user, you may prefer to use the
- ;; xscheme.el/cscheme -emacs interaction.
- ;;
- ;; Here's a summary of the pros and cons, as I see them.
- ;; xscheme: Tightly integrated with inferior cscheme process! A few commands
- ;; not in cmuscheme. But. Integration is a bit of a hack. Input
- ;; history only keeps the immediately prior input. Bizarre
- ;; keybindings.
- ;;
- ;; cmuscheme: Not tightly integrated with inferior cscheme process. But.
- ;; Carefully integrated functionality with the entire suite of
- ;; comint-derived CMU process modes. Keybindings reminiscent of
- ;; Zwei and Hemlock. Good input history. A few commands not in
- ;; xscheme.
- ;;
- ;; It's a tradeoff. Pay your money; take your choice. If you use a Scheme
- ;; that isn't Cscheme, of course, there isn't a choice. Xscheme.el is *very*
- ;; Cscheme-specific; you must use cmuscheme.el. Interested parties are
- ;; invited to port xscheme functionality on top of comint mode...
-
- ;;; Code:
-
- (require 'scheme)
- (require 'comint)
-
- ;;; INFERIOR SCHEME MODE STUFF
- ;;;============================================================================
-
- (defvar inferior-scheme-mode-hook nil
- "*Hook for customising inferior-scheme mode.")
- (defvar inferior-scheme-mode-map nil)
-
- (cond ((not inferior-scheme-mode-map)
- (setq inferior-scheme-mode-map
- (copy-keymap comint-mode-map))
- (define-key inferior-scheme-mode-map "\M-\C-x" ;gnu convention
- 'scheme-send-definition)
- (define-key inferior-scheme-mode-map "\C-x\C-e" 'scheme-send-last-sexp)
- (define-key inferior-scheme-mode-map "\C-c\C-l" 'scheme-load-file)
- (define-key inferior-scheme-mode-map "\C-c\C-k" 'scheme-compile-file)
- (scheme-mode-commands inferior-scheme-mode-map)))
-
- ;; Install the process communication commands in the scheme-mode keymap.
- (define-key scheme-mode-map "\M-\C-x" 'scheme-send-definition);gnu convention
- (define-key scheme-mode-map "\C-x\C-e" 'scheme-send-last-sexp);gnu convention
- (define-key scheme-mode-map "\C-c\C-e" 'scheme-send-definition)
- (define-key scheme-mode-map "\C-c\M-e" 'scheme-send-definition-and-go)
- (define-key scheme-mode-map "\C-c\C-r" 'scheme-send-region)
- (define-key scheme-mode-map "\C-c\M-r" 'scheme-send-region-and-go)
- (define-key scheme-mode-map "\C-c\M-c" 'scheme-compile-definition)
- (define-key scheme-mode-map "\C-c\C-c" 'scheme-compile-definition-and-go)
- (define-key scheme-mode-map "\C-c\C-z" 'switch-to-scheme)
- (define-key scheme-mode-map "\C-c\C-l" 'scheme-load-file)
- (define-key scheme-mode-map "\C-c\C-k" 'scheme-compile-file) ;k for "kompile"
-
- (defvar scheme-buffer)
-
- (defun inferior-scheme-mode ()
- "Major mode for interacting with an inferior Scheme process.
-
- The following commands are available:
- \\{inferior-scheme-mode-map}
-
- A Scheme process can be fired up with M-x run-scheme.
-
- Customisation: Entry to this mode runs the hooks on comint-mode-hook and
- inferior-scheme-mode-hook (in that order).
-
- You can send text to the inferior Scheme process from other buffers containing
- Scheme source.
- switch-to-scheme switches the current buffer to the Scheme process buffer.
- scheme-send-definition sends the current definition to the Scheme process.
- scheme-compile-definition compiles the current definition.
- scheme-send-region sends the current region to the Scheme process.
- scheme-compile-region compiles the current region.
-
- scheme-send-definition-and-go, scheme-compile-definition-and-go,
- scheme-send-region-and-go, and scheme-compile-region-and-go
- switch to the Scheme process buffer after sending their text.
- For information on running multiple processes in multiple buffers, see
- documentation for variable scheme-buffer.
-
- Commands:
- Return after the end of the process' output sends the text from the
- end of process to point.
- Return before the end of the process' output copies the sexp ending at point
- to the end of the process' output, and sends it.
- Delete converts tabs to spaces as it moves back.
- Tab indents for Scheme; with argument, shifts rest
- of expression rigidly with the current line.
- C-M-q does Tab on each line starting within following expression.
- Paragraphs are separated only by blank lines. Semicolons start comments.
- If you accidentally suspend your process, use \\[comint-continue-subjob]
- to continue it."
- (interactive)
- (comint-mode)
- ;; Customise in inferior-scheme-mode-hook
- (setq comint-prompt-regexp "^[^>\n]*>+ *") ; OK for cscheme, oaklisp, T,...
- (scheme-mode-variables)
- (setq major-mode 'inferior-scheme-mode)
- (setq mode-name "Inferior Scheme")
- (setq mode-line-process '(":%s"))
- (use-local-map inferior-scheme-mode-map)
- (setq comint-input-filter (function scheme-input-filter))
- (setq comint-get-old-input (function scheme-get-old-input))
- (run-hooks 'inferior-scheme-mode-hook))
-
- (defvar inferior-scheme-filter-regexp "\\`\\s *\\S ?\\S ?\\s *\\'"
- "*Input matching this regexp are not saved on the history list.
- Defaults to a regexp ignoring all inputs of 0, 1, or 2 letters.")
-
- (defun scheme-input-filter (str)
- "Don't save anything matching inferior-scheme-filter-regexp"
- (not (string-match inferior-scheme-filter-regexp str)))
-
- (defun scheme-get-old-input ()
- "Snarf the sexp ending at point"
- (save-excursion
- (let ((end (point)))
- (backward-sexp)
- (buffer-substring (point) end))))
-
- (defun scheme-args-to-list (string)
- (let ((where (string-match "[ \t]" string)))
- (cond ((null where) (list string))
- ((not (= where 0))
- (cons (substring string 0 where)
- (scheme-args-to-list (substring string (+ 1 where)
- (length string)))))
- (t (let ((pos (string-match "[^ \t]" string)))
- (if (null pos)
- nil
- (scheme-args-to-list (substring string pos
- (length string)))))))))
-
- (defvar scheme-program-name "scheme"
- "*Program invoked by the run-scheme command")
-
- ;;;###autoload
- (defun run-scheme (cmd)
- "Run an inferior Scheme process, input and output via buffer *scheme*.
- If there is a process already running in `*scheme*', switch to that buffer.
- With argument, allows you to edit the command line (default is value
- of `scheme-program-name'). Runs the hooks `inferior-scheme-mode-hook'
- \(after the `comint-mode-hook' is run).
- \(Type \\[describe-mode] in the process buffer for a list of commands.)"
-
- (interactive (list (if current-prefix-arg
- (read-string "Run Scheme: " scheme-program-name)
- scheme-program-name)))
- (if (not (comint-check-proc "*scheme*"))
- (let ((cmdlist (scheme-args-to-list cmd)))
- (set-buffer (apply 'make-comint "scheme" (car cmdlist)
- nil (cdr cmdlist)))
- (inferior-scheme-mode)))
- (setq scheme-program-name cmd)
- (setq scheme-buffer "*scheme*")
- (pop-to-buffer "*scheme*"))
- ;;;###autoload (add-hook 'same-window-buffer-names "*scheme*")
-
- (defun scheme-send-region (start end)
- "Send the current region to the inferior Scheme process."
- (interactive "r")
- (comint-send-region (scheme-proc) start end)
- (comint-send-string (scheme-proc) "\n"))
-
- (defun scheme-send-definition ()
- "Send the current definition to the inferior Scheme process."
- (interactive)
- (save-excursion
- (end-of-defun)
- (let ((end (point)))
- (beginning-of-defun)
- (scheme-send-region (point) end))))
-
- (defun scheme-send-last-sexp ()
- "Send the previous sexp to the inferior Scheme process."
- (interactive)
- (scheme-send-region (save-excursion (backward-sexp) (point)) (point)))
-
- (defvar scheme-compile-exp-command "(compile '%s)"
- "*Template for issuing commands to compile arbitrary Scheme expressions.")
-
- (defun scheme-compile-region (start end)
- "Compile the current region in the inferior Scheme process.
- \(A BEGIN is wrapped around the region: (BEGIN <region>))"
- (interactive "r")
- (comint-send-string (scheme-proc) (format scheme-compile-exp-command
- (format "(begin %s)"
- (buffer-substring start end))))
- (comint-send-string (scheme-proc) "\n"))
-
- (defun scheme-compile-definition ()
- "Compile the current definition in the inferior Scheme process."
- (interactive)
- (save-excursion
- (end-of-defun)
- (let ((end (point)))
- (beginning-of-defun)
- (scheme-compile-region (point) end))))
-
- (defun switch-to-scheme (eob-p)
- "Switch to the scheme process buffer.
- With argument, positions cursor at end of buffer."
- (interactive "P")
- (if (get-buffer scheme-buffer)
- (pop-to-buffer scheme-buffer)
- (error "No current process buffer. See variable scheme-buffer."))
- (cond (eob-p
- (push-mark)
- (goto-char (point-max)))))
-
- (defun scheme-send-region-and-go (start end)
- "Send the current region to the inferior Scheme process.
- Then switch to the process buffer."
- (interactive "r")
- (scheme-send-region start end)
- (switch-to-scheme t))
-
- (defun scheme-send-definition-and-go ()
- "Send the current definition to the inferior Scheme.
- Then switch to the process buffer."
- (interactive)
- (scheme-send-definition)
- (switch-to-scheme t))
-
- (defun scheme-compile-definition-and-go ()
- "Compile the current definition in the inferior Scheme.
- Then switch to the process buffer."
- (interactive)
- (scheme-compile-definition)
- (switch-to-scheme t))
-
- (defun scheme-compile-region-and-go (start end)
- "Compile the current region in the inferior Scheme.
- Then switch to the process buffer."
- (interactive "r")
- (scheme-compile-region start end)
- (switch-to-scheme t))
-
- (defvar scheme-source-modes '(scheme-mode)
- "*Used to determine if a buffer contains Scheme source code.
- If it's loaded into a buffer that is in one of these major modes, it's
- considered a scheme source file by scheme-load-file and scheme-compile-file.
- Used by these commands to determine defaults.")
-
- (defvar scheme-prev-l/c-dir/file nil
- "Caches the last (directory . file) pair.
- Caches the last pair used in the last scheme-load-file or
- scheme-compile-file command. Used for determining the default in the
- next one.")
-
- (defun scheme-load-file (file-name)
- "Load a Scheme file into the inferior Scheme process."
- (interactive (comint-get-source "Load Scheme file: " scheme-prev-l/c-dir/file
- scheme-source-modes t)) ; T because LOAD
- ; needs an exact name
- (comint-check-source file-name) ; Check to see if buffer needs saved.
- (setq scheme-prev-l/c-dir/file (cons (file-name-directory file-name)
- (file-name-nondirectory file-name)))
- (comint-send-string (scheme-proc) (concat "(load \""
- file-name
- "\"\)\n")))
-
- (defun scheme-compile-file (file-name)
- "Compile a Scheme file in the inferior Scheme process."
- (interactive (comint-get-source "Compile Scheme file: "
- scheme-prev-l/c-dir/file
- scheme-source-modes
- nil)) ; NIL because COMPILE doesn't
- ; need an exact name.
- (comint-check-source file-name) ; Check to see if buffer needs saved.
- (setq scheme-prev-l/c-dir/file (cons (file-name-directory file-name)
- (file-name-nondirectory file-name)))
- (comint-send-string (scheme-proc) (concat "(compile-file \""
- file-name
- "\"\)\n")))
-
-
- (defvar scheme-buffer nil "*The current scheme process buffer.
-
- MULTIPLE PROCESS SUPPORT
- ===========================================================================
- Cmuscheme.el supports, in a fairly simple fashion, running multiple Scheme
- processes. To run multiple Scheme processes, you start the first up with
- \\[run-scheme]. It will be in a buffer named *scheme*. Rename this buffer
- with \\[rename-buffer]. You may now start up a new process with another
- \\[run-scheme]. It will be in a new buffer, named *scheme*. You can
- switch between the different process buffers with \\[switch-to-buffer].
-
- Commands that send text from source buffers to Scheme processes --
- like scheme-send-definition or scheme-compile-region -- have to choose a
- process to send to, when you have more than one Scheme process around. This
- is determined by the global variable scheme-buffer. Suppose you
- have three inferior Schemes running:
- Buffer Process
- foo scheme
- bar scheme<2>
- *scheme* scheme<3>
- If you do a \\[scheme-send-definition-and-go] command on some Scheme source
- code, what process do you send it to?
-
- - If you're in a process buffer (foo, bar, or *scheme*),
- you send it to that process.
- - If you're in some other buffer (e.g., a source file), you
- send it to the process attached to buffer scheme-buffer.
- This process selection is performed by function scheme-proc.
-
- Whenever \\[run-scheme] fires up a new process, it resets scheme-buffer
- to be the new process's buffer. If you only run one process, this will
- do the right thing. If you run multiple processes, you can change
- scheme-buffer to another process buffer with \\[set-variable].
-
- More sophisticated approaches are, of course, possible. If you find yourself
- needing to switch back and forth between multiple processes frequently,
- you may wish to consider ilisp.el, a larger, more sophisticated package
- for running inferior Lisp and Scheme processes. The approach taken here is
- for a minimal, simple implementation. Feel free to extend it.")
-
- (defun scheme-proc ()
- "Returns the current scheme process. See variable scheme-buffer."
- (let ((proc (get-buffer-process (if (eq major-mode 'inferior-scheme-mode)
- (current-buffer)
- scheme-buffer))))
- (or proc
- (error "No current process. See variable scheme-buffer"))))
-
-
- ;;; Do the user's customisation...
-
- (defvar cmuscheme-load-hook nil
- "This hook is run when cmuscheme is loaded in.
- This is a good place to put keybindings.")
-
- (run-hooks 'cmuscheme-load-hook)
-
-
- ;;; CHANGE LOG
- ;;; ===========================================================================
- ;;; 8/88 Olin
- ;;; Created.
- ;;;
- ;;; 2/15/89 Olin
- ;;; Removed -emacs flag from process invocation. It's only useful for
- ;;; cscheme, and makes cscheme assume it's running under xscheme.el,
- ;;; which messes things up royally. A bug.
- ;;;
- ;;; 5/22/90 Olin
- ;;; - Upgraded to use comint-send-string and comint-send-region.
- ;;; - run-scheme now offers to let you edit the command line if
- ;;; you invoke it with a prefix-arg. M-x scheme is redundant, and
- ;;; has been removed.
- ;;; - Explicit references to process "scheme" have been replaced with
- ;;; (scheme-proc). This allows better handling of multiple process bufs.
- ;;; - Added scheme-send-last-sexp, bound to C-x C-e. A gnu convention.
- ;;; - Have not added process query facility a la cmulisp.el's lisp-show-arglist
- ;;; and friends, but interested hackers might find a useful application
- ;;; of this facility.
- ;;;
- ;;; 3/12/90 Olin
- ;;; - scheme-load-file and scheme-compile-file no longer switch-to-scheme.
- ;;; Tale suggested this.
-
- (provide 'cmuscheme)
-
- ;;; cmuscheme.el ends here
-