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1337 lines
56 KiB
EmacsLisp
1337 lines
56 KiB
EmacsLisp
;;; comint.el --- general command interpreter in a window stuff
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;; Copyright (C) 1988, 1990, 1992, 1993 Free Software Foundation, Inc.
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;; Author: Olin Shivers <shivers@cs.cmu.edu>
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;; Keywords: processes
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Commentary:
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;;; The changelog is at the end of this file.
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;;; Please send me bug reports, bug fixes, and extensions, so that I can
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;;; merge them into the master source.
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;;; - Olin Shivers (shivers@cs.cmu.edu)
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;;; This file defines a general command-interpreter-in-a-buffer package
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;;; (comint mode). The idea is that you can build specific process-in-a-buffer
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;;; modes on top of comint mode -- e.g., lisp, shell, scheme, T, soar, ....
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;;; This way, all these specific packages share a common base functionality,
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;;; and a common set of bindings, which makes them easier to use (and
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;;; saves code, implementation time, etc., etc.).
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;;; Several packages are already defined using comint mode:
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;;; - cmushell.el defines a shell-in-a-buffer mode.
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;;; - cmulisp.el defines a simple lisp-in-a-buffer mode.
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;;; Cmushell and cmulisp mode are similar to, and intended to replace,
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;;; their counterparts in the standard gnu emacs release (in shell.el).
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;;; These replacements are more featureful, robust, and uniform than the
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;;; released versions. The key bindings in lisp mode are also more compatible
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;;; with the bindings of Hemlock and Zwei (the Lisp Machine emacs).
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;;;
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;;; - The file cmuscheme.el defines a scheme-in-a-buffer mode.
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;;; - The file tea.el tunes scheme and inferior-scheme modes for T.
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;;; - The file soar.el tunes lisp and inferior-lisp modes for Soar.
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;;; - cmutex.el defines tex and latex modes that invoke tex, latex, bibtex,
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;;; previewers, and printers from within emacs.
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;;; - background.el allows csh-like job control inside emacs.
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;;; It is pretty easy to make new derived modes for other processes.
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;;; For documentation on the functionality provided by comint mode, and
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;;; the hooks available for customising it, see the comments below.
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;;; For further information on the standard derived modes (shell,
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;;; inferior-lisp, inferior-scheme, ...), see the relevant source files.
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;;; For hints on converting existing process modes (e.g., tex-mode,
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;;; background, dbx, gdb, kermit, prolog, telnet) to use comint-mode
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;;; instead of shell-mode, see the notes at the end of this file.
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;;; Brief Command Documentation:
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;;;============================================================================
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;;; Comint Mode Commands: (common to all derived modes, like cmushell & cmulisp
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;;; mode)
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;;;
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;;; m-p comint-previous-input Cycle backwards in input history
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;;; m-n comint-next-input Cycle forwards
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;;; m-r comint-previous-similar-input Previous similar input
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;;; m-s comint-next-similar-input Next similar input
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;;; c-m-r comint-previous-input-matching Search backwards in input history
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;;; return comint-send-input
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;;; c-a comint-bol Beginning of line; skip prompt.
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;;; c-d comint-delchar-or-maybe-eof Delete char unless at end of buff.
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;;; c-c c-u comint-kill-input ^u
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;;; c-c c-w backward-kill-word ^w
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;;; c-c c-c comint-interrupt-subjob ^c
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;;; c-c c-z comint-stop-subjob ^z
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;;; c-c c-\ comint-quit-subjob ^\
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;;; c-c c-o comint-kill-output Delete last batch of process output
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;;; c-c c-r comint-show-output Show last batch of process output
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;;;
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;;; Not bound by default in comint-mode
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;;; send-invisible Read a line w/o echo, and send to proc
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;;; (These are bound in shell-mode)
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;;; comint-dynamic-complete Complete filename at point.
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;;; comint-dynamic-list-completions List completions in help buffer.
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;;; comint-replace-by-expanded-filename Expand and complete filename at point;
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;;; replace with expanded/completed name.
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;;; comint-kill-subjob No mercy.
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;;; comint-continue-subjob Send CONT signal to buffer's process
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;;; group. Useful if you accidentally
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;;; suspend your process (with C-c C-z).
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;;;
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;;; These used to be bound for RMS -- I prefer the input history stuff,
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;;; but you might like 'em.
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;;; m-P comint-msearch-input Search backwards for prompt
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;;; m-N comint-psearch-input Search forwards for prompt
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;;; C-cR comint-msearch-input-matching Search backwards for prompt & string
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;;; comint-mode-hook is the comint mode hook. Basically for your keybindings.
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;;; comint-load-hook is run after loading in this package.
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;;; Code:
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(defconst comint-version "2.03")
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(require 'ring)
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;;; Buffer Local Variables:
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;;;============================================================================
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;;; Comint mode buffer local variables:
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;;; comint-prompt-regexp - string comint-bol uses to match prompt.
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;;; comint-last-input-start - marker Handy if inferior always echos
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;;; comint-last-input-end - marker For comint-kill-output command
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;;; comint-input-ring-size - integer For the input history
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;;; comint-input-ring - ring mechanism
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;;; comint-input-ring-index - marker ...
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;;; comint-last-input-match - string ...
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;;; comint-get-old-input - function Hooks for specific
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;;; comint-input-sentinel - function process-in-a-buffer
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;;; comint-input-filter - function modes.
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;;; comint-input-send - function
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;;; comint-eol-on-send - boolean
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(defvar comint-prompt-regexp "^"
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"Regexp to recognise prompts in the inferior process.
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Defaults to \"^\", the null string at BOL.
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Good choices:
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Canonical Lisp: \"^[^> ]*>+:? *\" (Lucid, franz, kcl, T, cscheme, oaklisp)
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Lucid Common Lisp: \"^\\(>\\|\\(->\\)+\\) *\"
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franz: \"^\\(->\\|<[0-9]*>:\\) *\"
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kcl: \"^>+ *\"
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shell: \"^[^#$%>]*[#$%>] *\"
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T: \"^>+ *\"
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This is a good thing to set in mode hooks.")
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(defvar comint-input-ring-size 30
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"Size of input history ring.")
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;;; Here are the per-interpreter hooks.
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(defvar comint-get-old-input (function comint-get-old-input-default)
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"Function that submits old text in comint mode.
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This function is called when return is typed while the point is in old text.
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It returns the text to be submitted as process input. The default is
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comint-get-old-input-default, which grabs the current line, and strips off
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leading text matching comint-prompt-regexp")
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(defvar comint-input-sentinel (function ignore)
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"Called on each input submitted to comint mode process by comint-send-input.
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Thus it can, for instance, track cd/pushd/popd commands issued to the csh.")
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(defvar comint-input-filter
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(function (lambda (str) (not (string-match "\\`\\s *\\'" str))))
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"Predicate for filtering additions to input history.
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Only inputs answering true to this function are saved on the input
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history list. Default is to save anything that isn't all whitespace")
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(defvar comint-input-sender (function comint-simple-send)
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"Function to actually send to PROCESS the STRING submitted by user.
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Usually this is just 'comint-simple-send, but if your mode needs to
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massage the input string, this is your hook. This is called from
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the user command comint-send-input. comint-simple-send just sends
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the string plus a newline.")
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(defvar comint-eol-on-send 'T
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"If non-nil, then jump to the end of the line before sending input to process.
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See comint-send-input")
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(defvar comint-mode-hook '()
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"Called upon entry into comint-mode
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This is run before the process is cranked up.")
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(defvar comint-exec-hook '()
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"Called each time a process is exec'd by comint-exec.
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This is called after the process is cranked up. It is useful for things that
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must be done each time a process is executed in a comint-mode buffer (e.g.,
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(process-kill-without-query)). In contrast, the comint-mode-hook is only
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executed once when the buffer is created.")
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(defvar comint-mode-map nil)
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(defvar comint-ptyp t
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"True if communications via pty; false if by pipe. Buffer local.
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This is to work around a bug in emacs process signalling.")
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(defvar comint-last-input-match ""
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"Last string searched for by comint input history search, for defaulting.
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Buffer local variable.")
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(defvar comint-input-ring nil)
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(defvar comint-last-input-start)
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(defvar comint-last-input-end)
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(defvar comint-input-ring-index)
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(put 'comint-input-ring 'permanent-local t)
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(put 'comint-ptyp 'permanent-local t)
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(defun comint-mode ()
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"Major mode for interacting with an inferior interpreter.
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Interpreter name is same as buffer name, sans the asterisks.
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Return at end of buffer sends line as input.
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Return not at end copies rest of line to end and sends it.
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Setting mode variable comint-eol-on-send means jump to the end of the line
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before submitting new input.
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This mode is typically customised to create inferior-lisp-mode,
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shell-mode, etc.. This can be done by setting the hooks
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comint-input-sentinel, comint-input-filter, comint-input-sender and
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comint-get-old-input to appropriate functions, and the variable
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comint-prompt-regexp to the appropriate regular expression.
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An input history is maintained of size comint-input-ring-size, and
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can be accessed with the commands comint-next-input [\\[comint-next-input]] and
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comint-previous-input [\\[comint-previous-input]]. Commands not keybound by
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default are send-invisible, comint-dynamic-complete, and
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comint-list-dynamic-completions.
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If you accidentally suspend your process, use \\[comint-continue-subjob]
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to continue it.
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\\{comint-mode-map}
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Entry to this mode runs the hooks on comint-mode-hook"
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(interactive)
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;; Do not remove this. All major modes must do this.
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(kill-all-local-variables)
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(setq major-mode 'comint-mode)
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(setq mode-name "Comint")
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(setq mode-line-process '(": %s"))
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(use-local-map comint-mode-map)
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(make-local-variable 'comint-last-input-start)
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(setq comint-last-input-start (make-marker))
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(make-local-variable 'comint-last-input-end)
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(setq comint-last-input-end (make-marker))
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(make-local-variable 'comint-last-input-match)
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(setq comint-last-input-match "")
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(make-local-variable 'comint-prompt-regexp) ; Don't set; default
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(make-local-variable 'comint-input-ring-size) ; ...to global val.
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(make-local-variable 'comint-input-ring)
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(make-local-variable 'comint-input-ring-index)
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(setq comint-input-ring-index 0)
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(make-local-variable 'comint-get-old-input)
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(make-local-variable 'comint-input-sentinel)
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(make-local-variable 'comint-input-filter)
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(make-local-variable 'comint-input-sender)
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(make-local-variable 'comint-eol-on-send)
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(make-local-variable 'comint-ptyp)
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(make-local-variable 'comint-exec-hook)
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(run-hooks 'comint-mode-hook)
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(or comint-input-ring
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(setq comint-input-ring (make-ring comint-input-ring-size))))
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(if comint-mode-map
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nil
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(setq comint-mode-map (make-sparse-keymap))
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(define-key comint-mode-map "\ep" 'comint-previous-input)
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(define-key comint-mode-map "\en" 'comint-next-input)
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(define-key comint-mode-map "\er" 'comint-previous-similar-input)
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(define-key comint-mode-map "\es" 'comint-next-similar-input)
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(define-key comint-mode-map "\C-m" 'comint-send-input)
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(define-key comint-mode-map "\C-d" 'comint-delchar-or-maybe-eof)
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(define-key comint-mode-map "\C-a" 'comint-bol)
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(define-key comint-mode-map "\C-c\C-u" 'comint-kill-input)
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(define-key comint-mode-map "\C-c\C-w" 'backward-kill-word)
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(define-key comint-mode-map "\C-c\C-c" 'comint-interrupt-subjob)
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(define-key comint-mode-map "\C-c\C-z" 'comint-stop-subjob)
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(define-key comint-mode-map "\C-c\C-\\" 'comint-quit-subjob)
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(define-key comint-mode-map "\C-c\C-o" 'comint-kill-output)
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(define-key comint-mode-map "\C-\M-r" 'comint-previous-input-matching)
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(define-key comint-mode-map "\C-c\C-r" 'comint-show-output)
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;;; prompt-search commands commented out 3/90 -Olin
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; (define-key comint-mode-map "\eP" 'comint-msearch-input)
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; (define-key comint-mode-map "\eN" 'comint-psearch-input)
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; (define-key comint-mode-map "\C-cR" 'comint-msearch-input-matching)
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)
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;;; This function is used to make a full copy of the comint mode map,
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;;; so that client modes won't interfere with each other. This function
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;;; isn't necessary in emacs 18.5x, but we keep it around for 18.4x versions.
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(defun full-copy-sparse-keymap (km)
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"Recursively copy the sparse keymap KM"
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(cond ((consp km)
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(cons (full-copy-sparse-keymap (car km))
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(full-copy-sparse-keymap (cdr km))))
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(t km)))
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(defun comint-check-proc (buffer)
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"True if there is a process associated w/buffer BUFFER, and
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it is alive (status RUN or STOP). BUFFER can be either a buffer or the
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name of one"
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(let ((proc (get-buffer-process buffer)))
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(and proc (memq (process-status proc) '(run stop)))))
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;;; Note that this guy, unlike shell.el's make-shell, barfs if you pass it ()
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;;; for the second argument (program).
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;;;###autoload
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(defun make-comint (name program &optional startfile &rest switches)
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"Make a comint process NAME in a buffer, running PROGRAM.
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The name of the buffer is made by surrounding NAME with `*'s.
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If there is already a running process in that buffer, it is not restarted.
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Optional third arg STARTFILE is the name of a file to send the contents of to
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the process. Any more args are arguments to PROGRAM."
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(let ((buffer (get-buffer-create (concat "*" name "*"))))
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;; If no process, or nuked process, crank up a new one and put buffer in
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;; comint mode. Otherwise, leave buffer and existing process alone.
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(cond ((not (comint-check-proc buffer))
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(save-excursion
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(set-buffer buffer)
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(comint-mode)) ; Install local vars, mode, keymap, ...
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(comint-exec buffer name program startfile switches)))
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buffer))
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(defun comint-exec (buffer name command startfile switches)
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"Fires up a process in buffer for comint modes.
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Blasts any old process running in the buffer. Doesn't set the buffer mode.
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You can use this to cheaply run a series of processes in the same comint
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buffer. The hook comint-exec-hook is run after each exec."
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(save-excursion
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(set-buffer buffer)
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(let ((proc (get-buffer-process buffer))) ; Blast any old process.
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(if proc (delete-process proc)))
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;; Crank up a new process
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(let ((proc (comint-exec-1 name buffer command switches)))
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(make-local-variable 'comint-ptyp)
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(setq comint-ptyp process-connection-type) ; T if pty, NIL if pipe.
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;; Jump to the end, and set the process mark.
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(goto-char (point-max))
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(set-marker (process-mark proc) (point))
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;; Feed it the startfile.
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(cond (startfile
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;;This is guaranteed to wait long enough
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;;but has bad results if the comint does not prompt at all
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;; (while (= size (buffer-size))
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;; (sleep-for 1))
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;;I hope 1 second is enough!
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(sleep-for 1)
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(goto-char (point-max))
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(insert-file-contents startfile)
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(setq startfile (buffer-substring (point) (point-max)))
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(delete-region (point) (point-max))
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(comint-send-string proc startfile)))
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(run-hooks 'comint-exec-hook)
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buffer)))
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;;; This auxiliary function cranks up the process for comint-exec in
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;;; the appropriate environment.
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(defun comint-exec-1 (name buffer command switches)
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(let ((process-environment
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(comint-update-env process-environment
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(list (format "TERMCAP=emacs:co#%d:tc=unknown"
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(frame-width))
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"TERM=emacs"
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"EMACS=t"))))
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(apply 'start-process name buffer command switches)))
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;; This is just (append new old-env) that compresses out shadowed entries.
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;; It's also pretty ugly, mostly due to lisp's horrible iteration structures.
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(defun comint-update-env (old-env new)
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(let ((ans (reverse new))
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(vars (mapcar (function (lambda (vv)
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(and (string-match "^[^=]*=" vv)
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(substring vv 0 (match-end 0)))))
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new)))
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(while old-env
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(let* ((vv (car old-env)) ; vv is var=value
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(var (and (string-match "^[^=]*=" vv)
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(substring vv 0 (match-end 0)))))
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(setq old-env (cdr old-env))
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(cond ((not (and var (comint-mem var vars)))
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(if var (setq var (cons var vars)))
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(setq ans (cons vv ans))))))
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(nreverse ans)))
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;;; This should be in emacs, but it isn't.
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(defun comint-mem (item list &optional elt=)
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"Test to see if ITEM is equal to an item in LIST.
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Option comparison function ELT= defaults to equal."
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(let ((elt= (or elt= (function equal)))
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(done nil))
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(while (and list (not done))
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(if (funcall elt= item (car list))
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(setq done list)
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(setq list (cdr list))))
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done))
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;;; Input history retrieval commands
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;;; M-p -- previous input M-n -- next input
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;;; M-C-r -- previous input matching
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;;; ===========================================================================
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(defun comint-previous-input (arg)
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"Cycle backwards through input history."
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(interactive "*p")
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(let ((len (ring-length comint-input-ring)))
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(cond ((<= len 0)
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(message "Empty input ring")
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(ding))
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((not (comint-after-pmark-p))
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(message "Not after process mark")
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(ding))
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(t
|
||
(delete-region (point)
|
||
(process-mark (get-buffer-process (current-buffer))))
|
||
;; Initialize the index on the first use of this command
|
||
;; so that the first M-p gets index 0, and the first M-n gets
|
||
;; index -1.
|
||
(if (null comint-input-ring-index)
|
||
(setq comint-input-ring-index
|
||
(if (> arg 0) -1
|
||
(if (< arg 0) 1 0))))
|
||
(setq comint-input-ring-index
|
||
(comint-mod (+ comint-input-ring-index arg) len))
|
||
(message "%d" (1+ comint-input-ring-index))
|
||
(insert (ring-ref comint-input-ring comint-input-ring-index))))))
|
||
|
||
(defun comint-mod (n m)
|
||
"Returns N mod M. M is positive.
|
||
Answer is guaranteed to be non-negative, and less than m."
|
||
(let ((n (% n m)))
|
||
(if (>= n 0) n
|
||
(+ n
|
||
(if (>= m 0) m (- m)))))) ; (abs m)
|
||
|
||
(defun comint-next-input (arg)
|
||
"Cycle forwards through input history."
|
||
(interactive "*p")
|
||
(comint-previous-input (- arg)))
|
||
|
||
(defun comint-previous-input-matching (str)
|
||
"Searches backwards through input history for substring match."
|
||
(interactive (let* ((last-command last-command) ; preserve around r-f-m
|
||
(s (read-from-minibuffer
|
||
(format "Command substring (default %s): "
|
||
comint-last-input-match))))
|
||
(list (if (string= s "") comint-last-input-match s))))
|
||
; (interactive "sCommand substring: ")
|
||
(setq comint-last-input-match str) ; update default
|
||
(if (null comint-input-ring-index)
|
||
(setq comint-input-ring-index -1))
|
||
(let ((str (regexp-quote str))
|
||
(len (ring-length comint-input-ring))
|
||
(n (+ comint-input-ring-index 1)))
|
||
(while (and (< n len) (not (string-match str (ring-ref comint-input-ring n))))
|
||
(setq n (+ n 1)))
|
||
(cond ((< n len)
|
||
(comint-previous-input (- n comint-input-ring-index)))
|
||
(t (error "Not found")))))
|
||
|
||
|
||
;;; These next three commands are alternatives to the input history commands
|
||
;;; -- comint-next-input, comint-previous-input and
|
||
;;; comint-previous-input-matching. They search through the process buffer
|
||
;;; text looking for occurrences of the prompt. Bound to M-P, M-N, and C-c R
|
||
;;; (uppercase P, N, and R) for now. Try'em out. Go with what you like...
|
||
|
||
;;; comint-msearch-input-matching prompts for a string, not a regexp.
|
||
;;; This could be considered to be the wrong thing. I decided to keep it
|
||
;;; simple, and not make the user worry about regexps. This, of course,
|
||
;;; limits functionality.
|
||
|
||
;;; These commands were deemed non-winning and have been commented out.
|
||
;;; Feel free to re-enable them if you like. -Olin 3/91
|
||
|
||
;(defun comint-psearch-input ()
|
||
; "Search forwards for next occurrence of prompt and skip to end of line.
|
||
;\(prompt is anything matching regexp comint-prompt-regexp)"
|
||
; (interactive)
|
||
; (if (re-search-forward comint-prompt-regexp (point-max) t)
|
||
; (end-of-line)
|
||
; (error "No occurrence of prompt found")))
|
||
;
|
||
;(defun comint-msearch-input ()
|
||
; "Search backwards for previous occurrence of prompt and skip to end of line.
|
||
;Search starts from beginning of current line."
|
||
; (interactive)
|
||
; (let ((p (save-excursion
|
||
; (beginning-of-line)
|
||
; (cond ((re-search-backward comint-prompt-regexp (point-min) t)
|
||
; (end-of-line)
|
||
; (point))
|
||
; (t nil)))))
|
||
; (if p (goto-char p)
|
||
; (error "No occurrence of prompt found"))))
|
||
;
|
||
;(defun comint-msearch-input-matching (str)
|
||
; "Search backwards for occurrence of prompt followed by STRING.
|
||
;STRING is prompted for, and is NOT a regular expression."
|
||
; (interactive (let ((s (read-from-minibuffer
|
||
; (format "Command (default %s): "
|
||
; comint-last-input-match))))
|
||
; (list (if (string= s "") comint-last-input-match s))))
|
||
;; (interactive "sCommand: ")
|
||
; (setq comint-last-input-match str) ; update default
|
||
; (let* ((r (concat comint-prompt-regexp (regexp-quote str)))
|
||
; (p (save-excursion
|
||
; (beginning-of-line)
|
||
; (cond ((re-search-backward r (point-min) t)
|
||
; (end-of-line)
|
||
; (point))
|
||
; (t nil)))))
|
||
; (if p (goto-char p)
|
||
; (error "No match"))))
|
||
|
||
;;;
|
||
;;; Similar input -- contributed by ccm and highly winning.
|
||
;;;
|
||
;;; Reenter input, removing back to the last insert point if it exists.
|
||
;;;
|
||
(defvar comint-last-similar-string ""
|
||
"The string last used in a similar string search.")
|
||
(defun comint-previous-similar-input (arg)
|
||
"Fetch the previous (older) input that matches the string typed so far.
|
||
Successive repetitions find successively older matching inputs.
|
||
A prefix argument serves as a repeat count; a negative argument
|
||
fetches following (more recent) inputs."
|
||
(interactive "p")
|
||
(if (not (comint-after-pmark-p))
|
||
(error "Not after process mark"))
|
||
(if (null comint-input-ring-index)
|
||
(setq comint-input-ring-index
|
||
(if (> arg 0) -1
|
||
(if (< arg 0) 1 0))))
|
||
(if (not (or (eq last-command 'comint-previous-similar-input)
|
||
(eq last-command 'comint-next-similar-input)))
|
||
(setq comint-last-similar-string
|
||
(buffer-substring
|
||
(process-mark (get-buffer-process (current-buffer)))
|
||
(point))))
|
||
(let* ((size (length comint-last-similar-string))
|
||
(len (ring-length comint-input-ring))
|
||
(n (+ comint-input-ring-index arg))
|
||
entry)
|
||
(while (and (< n len)
|
||
(or (< (length (setq entry (ring-ref comint-input-ring n))) size)
|
||
(not (equal comint-last-similar-string
|
||
(substring entry 0 size)))))
|
||
(setq n (+ n arg)))
|
||
(cond ((< n len)
|
||
(setq comint-input-ring-index n)
|
||
(if (or (eq last-command 'comint-previous-similar-input)
|
||
(eq last-command 'comint-next-similar-input))
|
||
(delete-region (mark) (point)) ; repeat
|
||
(push-mark (point))) ; 1st time
|
||
(insert (substring entry size)))
|
||
(t (error "Not found")))
|
||
(message "%d" (1+ comint-input-ring-index))))
|
||
|
||
(defun comint-next-similar-input (arg)
|
||
"Fetch the next (newer) input that matches the string typed so far.
|
||
Successive repetitions find successively newer matching inputs.
|
||
A prefix argument serves as a repeat count; a negative argument
|
||
fetches previous (older) inputs."
|
||
(interactive "p")
|
||
(comint-previous-similar-input (- arg)))
|
||
|
||
(defun comint-send-input ()
|
||
"Send input to process.
|
||
After the process output mark, sends all text from the process mark to
|
||
point as input to the process. Before the process output mark, calls value
|
||
of variable comint-get-old-input to retrieve old input, copies it to the
|
||
process mark, and sends it. A terminal newline is also inserted into the
|
||
buffer and sent to the process. In either case, value of variable
|
||
comint-input-sentinel is called on the input before sending it. The input
|
||
is entered into the input history ring, if the value of variable
|
||
comint-input-filter returns non-nil when called on the input.
|
||
|
||
If variable comint-eol-on-send is non-nil, then point is moved to the end of
|
||
line before sending the input.
|
||
|
||
comint-get-old-input, comint-input-sentinel, and comint-input-filter are chosen
|
||
according to the command interpreter running in the buffer. E.g.,
|
||
If the interpreter is the csh,
|
||
comint-get-old-input is the default: take the current line, discard any
|
||
initial string matching regexp comint-prompt-regexp.
|
||
comint-input-sentinel monitors input for \"cd\", \"pushd\", and \"popd\"
|
||
commands. When it sees one, it cd's the buffer.
|
||
comint-input-filter is the default: returns T if the input isn't all white
|
||
space.
|
||
|
||
If the comint is Lucid Common Lisp,
|
||
comint-get-old-input snarfs the sexp ending at point.
|
||
comint-input-sentinel does nothing.
|
||
comint-input-filter returns NIL if the input matches input-filter-regexp,
|
||
which matches (1) all whitespace (2) :a, :c, etc.
|
||
|
||
Similarly for Soar, Scheme, etc."
|
||
(interactive)
|
||
;; Note that the input string does not include its terminal newline.
|
||
(let ((proc (get-buffer-process (current-buffer))))
|
||
(if (not proc) (error "Current buffer has no process")
|
||
(let* ((pmark (process-mark proc))
|
||
(pmark-val (marker-position pmark))
|
||
(input (if (>= (point) pmark-val)
|
||
(progn (if comint-eol-on-send (end-of-line))
|
||
(buffer-substring pmark (point)))
|
||
(let ((copy (funcall comint-get-old-input)))
|
||
(goto-char pmark)
|
||
(insert copy)
|
||
copy))))
|
||
(insert ?\n)
|
||
(if (funcall comint-input-filter input)
|
||
(ring-insert comint-input-ring input))
|
||
(funcall comint-input-sentinel input)
|
||
(funcall comint-input-sender proc input)
|
||
(setq comint-input-ring-index nil)
|
||
(set-marker comint-last-input-start pmark)
|
||
(set-marker comint-last-input-end (point))
|
||
(set-marker (process-mark proc) (point))))))
|
||
|
||
(defun comint-get-old-input-default ()
|
||
"Default for comint-get-old-input.
|
||
Take the current line, and discard any initial text matching
|
||
comint-prompt-regexp."
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(comint-skip-prompt)
|
||
(let ((beg (point)))
|
||
(end-of-line)
|
||
(buffer-substring beg (point)))))
|
||
|
||
(defun comint-skip-prompt ()
|
||
"Skip past the text matching regexp comint-prompt-regexp.
|
||
If this takes us past the end of the current line, don't skip at all."
|
||
(let ((eol (save-excursion (end-of-line) (point))))
|
||
(if (and (looking-at comint-prompt-regexp)
|
||
(<= (match-end 0) eol))
|
||
(goto-char (match-end 0)))))
|
||
|
||
|
||
(defun comint-after-pmark-p ()
|
||
"Is point after the process output marker?"
|
||
;; Since output could come into the buffer after we looked at the point
|
||
;; but before we looked at the process marker's value, we explicitly
|
||
;; serialise. This is just because I don't know whether or not emacs
|
||
;; services input during execution of lisp commands.
|
||
(let ((proc-pos (marker-position
|
||
(process-mark (get-buffer-process (current-buffer))))))
|
||
(<= proc-pos (point))))
|
||
|
||
(defun comint-simple-send (proc string)
|
||
"Default function for sending to PROC input STRING.
|
||
This just sends STRING plus a newline. To override this,
|
||
set the hook COMINT-INPUT-SENDER."
|
||
(comint-send-string proc string)
|
||
(comint-send-string proc "\n"))
|
||
|
||
(defun comint-bol (arg)
|
||
"Goes to the beginning of line, then skips past the prompt, if any.
|
||
If a prefix argument is given (\\[universal-argument]), then no prompt skip
|
||
-- go straight to column 0.
|
||
|
||
The prompt skip is done by skipping text matching the regular expression
|
||
comint-prompt-regexp, a buffer local variable.
|
||
|
||
If you don't like this command, reset c-a to beginning-of-line
|
||
in your hook, comint-mode-hook."
|
||
(interactive "P")
|
||
(beginning-of-line)
|
||
(if (null arg) (comint-skip-prompt)))
|
||
|
||
;;; These two functions are for entering text you don't want echoed or
|
||
;;; saved -- typically passwords to ftp, telnet, or somesuch.
|
||
;;; Just enter m-x send-invisible and type in your line.
|
||
|
||
(defun comint-read-noecho (prompt &optional stars)
|
||
"Read a single line of text from user without echoing, and return it.
|
||
Prompt with argument PROMPT, a string. Optional argument STARS causes
|
||
input to be echoed with '*' characters on the prompt line. Input ends with
|
||
RET, LFD, or ESC. DEL or C-h rubs out. C-u kills line. C-g aborts (if
|
||
inhibit-quit is set because e.g. this function was called from a process
|
||
filter and C-g is pressed, this function will return `nil', rather than a
|
||
string).
|
||
|
||
Note that the keystrokes comprising the text can still be recovered
|
||
(temporarily) with \\[view-lossage]. This may be a security bug for some
|
||
applications."
|
||
(let ((ans "")
|
||
(c 0)
|
||
(echo-keystrokes 0)
|
||
(cursor-in-echo-area t)
|
||
(done nil))
|
||
(while (not done)
|
||
(if stars
|
||
(message "%s%s" prompt (make-string (length ans) ?*))
|
||
(message prompt))
|
||
(setq c (read-char))
|
||
(cond ((= c ?\C-g)
|
||
;; This function may get called from a process filter, where
|
||
;; inhibit-quit is set. In later versions of emacs read-char
|
||
;; may clear quit-flag itself and return C-g. That would make
|
||
;; it impossible to quit this loop in a simple way, so
|
||
;; re-enable it here (for backward-compatibility the check for
|
||
;; quit-flag below would still be necessary, so this is seems
|
||
;; like the simplest way to do things).
|
||
(setq quit-flag t
|
||
done t))
|
||
((or (= c ?\r) (= c ?\n) (= c ?\e))
|
||
(setq done t))
|
||
((= c ?\C-u)
|
||
(setq ans ""))
|
||
((and (/= c ?\b) (/= c ?\177))
|
||
(setq ans (concat ans (char-to-string c))))
|
||
((> (length ans) 0)
|
||
(setq ans (substring ans 0 -1)))))
|
||
(if quit-flag
|
||
;; Emulate a true quit, except that we have to return a value.
|
||
(prog1
|
||
(setq quit-flag nil)
|
||
(message "Quit")
|
||
(beep t))
|
||
(message "")
|
||
ans)))
|
||
|
||
(defun send-invisible (str)
|
||
"Read a string without echoing.
|
||
Then send it to the process running in the current buffer. A new-line
|
||
is additionally sent. String is not saved on comint input history list.
|
||
Security bug: your string can still be temporarily recovered with
|
||
\\[view-lossage]."
|
||
; (interactive (list (comint-read-noecho "Enter non-echoed text")))
|
||
(interactive "P") ; Defeat snooping via C-x esc
|
||
(let ((proc (get-buffer-process (current-buffer))))
|
||
(if (not proc) (error "Current buffer has no process")
|
||
(comint-send-string proc
|
||
(if (stringp str) str
|
||
(comint-read-noecho "Non-echoed text: " t)))
|
||
(comint-send-string proc "\n"))))
|
||
|
||
|
||
;;; Low-level process communication
|
||
|
||
(defvar comint-input-chunk-size 512
|
||
"*Long inputs send to comint processes are broken up into chunks of this size.
|
||
If your process is choking on big inputs, try lowering the value.")
|
||
|
||
(defun comint-send-string (proc str)
|
||
"Send PROCESS the contents of STRING as input.
|
||
This is equivalent to process-send-string, except that long input strings
|
||
are broken up into chunks of size comint-input-chunk-size. Processes
|
||
are given a chance to output between chunks. This can help prevent processes
|
||
from hanging when you send them long inputs on some OS's."
|
||
(let* ((len (length str))
|
||
(i (min len comint-input-chunk-size)))
|
||
(process-send-string proc (substring str 0 i))
|
||
(while (< i len)
|
||
(let ((next-i (+ i comint-input-chunk-size)))
|
||
(accept-process-output)
|
||
(process-send-string proc (substring str i (min len next-i)))
|
||
(setq i next-i)))))
|
||
|
||
(defun comint-send-region (proc start end)
|
||
"Sends to PROC the region delimited by START and END.
|
||
This is a replacement for process-send-region that tries to keep
|
||
your process from hanging on long inputs. See comint-send-string."
|
||
(comint-send-string proc (buffer-substring start end)))
|
||
|
||
|
||
;;; Random input hackage
|
||
|
||
(defun comint-kill-output ()
|
||
"Kill all output from interpreter since last input."
|
||
(interactive)
|
||
(let ((pmark (process-mark (get-buffer-process (current-buffer)))))
|
||
(kill-region comint-last-input-end pmark)
|
||
(goto-char pmark)
|
||
(insert "*** output flushed ***\n")
|
||
(set-marker pmark (point))))
|
||
|
||
(defun comint-show-output ()
|
||
"Display start of this batch of interpreter output at top of window.
|
||
Also put cursor there."
|
||
(interactive)
|
||
(goto-char comint-last-input-end)
|
||
(backward-char)
|
||
(beginning-of-line)
|
||
(set-window-start (selected-window) (point))
|
||
(end-of-line))
|
||
|
||
(defun comint-interrupt-subjob ()
|
||
"Interrupt the current subjob."
|
||
(interactive)
|
||
(interrupt-process nil comint-ptyp))
|
||
|
||
(defun comint-kill-subjob ()
|
||
"Send kill signal to the current subjob."
|
||
(interactive)
|
||
(kill-process nil comint-ptyp))
|
||
|
||
(defun comint-quit-subjob ()
|
||
"Send quit signal to the current subjob."
|
||
(interactive)
|
||
(quit-process nil comint-ptyp))
|
||
|
||
(defun comint-stop-subjob ()
|
||
"Stop the current subjob.
|
||
WARNING: if there is no current subjob, you can end up suspending
|
||
the top-level process running in the buffer. If you accidentally do
|
||
this, use \\[comint-continue-subjob] to resume the process. (This
|
||
is not a problem with most shells, since they ignore this signal.)"
|
||
(interactive)
|
||
(stop-process nil comint-ptyp))
|
||
|
||
(defun comint-continue-subjob ()
|
||
"Send CONT signal to process buffer's process group.
|
||
Useful if you accidentally suspend the top-level process."
|
||
(interactive)
|
||
(continue-process nil comint-ptyp))
|
||
|
||
(defun comint-kill-input ()
|
||
"Kill all text from last stuff output by interpreter to point."
|
||
(interactive)
|
||
(let* ((pmark (process-mark (get-buffer-process (current-buffer))))
|
||
(p-pos (marker-position pmark)))
|
||
(if (> (point) p-pos)
|
||
(kill-region pmark (point)))))
|
||
|
||
(defun comint-delchar-or-maybe-eof (arg)
|
||
"Delete ARG characters forward, or send an EOF to process if at end of buffer."
|
||
(interactive "p")
|
||
(if (eobp)
|
||
(process-send-eof)
|
||
(delete-char arg)))
|
||
|
||
|
||
|
||
|
||
;;; Support for source-file processing commands.
|
||
;;;============================================================================
|
||
;;; Many command-interpreters (e.g., Lisp, Scheme, Soar) have
|
||
;;; commands that process files of source text (e.g. loading or compiling
|
||
;;; files). So the corresponding process-in-a-buffer modes have commands
|
||
;;; for doing this (e.g., lisp-load-file). The functions below are useful
|
||
;;; for defining these commands.
|
||
;;;
|
||
;;; Alas, these guys don't do exactly the right thing for Lisp, Scheme
|
||
;;; and Soar, in that they don't know anything about file extensions.
|
||
;;; So the compile/load interface gets the wrong default occasionally.
|
||
;;; The load-file/compile-file default mechanism could be smarter -- it
|
||
;;; doesn't know about the relationship between filename extensions and
|
||
;;; whether the file is source or executable. If you compile foo.lisp
|
||
;;; with compile-file, then the next load-file should use foo.bin for
|
||
;;; the default, not foo.lisp. This is tricky to do right, particularly
|
||
;;; because the extension for executable files varies so much (.o, .bin,
|
||
;;; .lbin, .mo, .vo, .ao, ...).
|
||
|
||
|
||
;;; COMINT-SOURCE-DEFAULT -- determines defaults for source-file processing
|
||
;;; commands.
|
||
;;;
|
||
;;; COMINT-CHECK-SOURCE -- if FNAME is in a modified buffer, asks you if you
|
||
;;; want to save the buffer before issuing any process requests to the command
|
||
;;; interpreter.
|
||
;;;
|
||
;;; COMINT-GET-SOURCE -- used by the source-file processing commands to prompt
|
||
;;; for the file to process.
|
||
|
||
;;; (COMINT-SOURCE-DEFAULT previous-dir/file source-modes)
|
||
;;;============================================================================
|
||
;;; This function computes the defaults for the load-file and compile-file
|
||
;;; commands for tea, soar, cmulisp, and cmuscheme modes.
|
||
;;;
|
||
;;; - PREVIOUS-DIR/FILE is a pair (directory . filename) from the last
|
||
;;; source-file processing command. NIL if there hasn't been one yet.
|
||
;;; - SOURCE-MODES is a list used to determine what buffers contain source
|
||
;;; files: if the major mode of the buffer is in SOURCE-MODES, it's source.
|
||
;;; Typically, (lisp-mode) or (scheme-mode).
|
||
;;;
|
||
;;; If the command is given while the cursor is inside a string, *and*
|
||
;;; the string is an existing filename, *and* the filename is not a directory,
|
||
;;; then the string is taken as default. This allows you to just position
|
||
;;; your cursor over a string that's a filename and have it taken as default.
|
||
;;;
|
||
;;; If the command is given in a file buffer whose major mode is in
|
||
;;; SOURCE-MODES, then the the filename is the default file, and the
|
||
;;; file's directory is the default directory.
|
||
;;;
|
||
;;; If the buffer isn't a source file buffer (e.g., it's the process buffer),
|
||
;;; then the default directory & file are what was used in the last source-file
|
||
;;; processing command (i.e., PREVIOUS-DIR/FILE). If this is the first time
|
||
;;; the command has been run (PREVIOUS-DIR/FILE is nil), the default directory
|
||
;;; is the cwd, with no default file. (\"no default file\" = nil)
|
||
;;;
|
||
;;; SOURCE-REGEXP is typically going to be something like (tea-mode)
|
||
;;; for T programs, (lisp-mode) for Lisp programs, (soar-mode lisp-mode)
|
||
;;; for Soar programs, etc.
|
||
;;;
|
||
;;; The function returns a pair: (default-directory . default-file).
|
||
|
||
(defun comint-source-default (previous-dir/file source-modes)
|
||
(cond ((and buffer-file-name (memq major-mode source-modes))
|
||
(cons (file-name-directory buffer-file-name)
|
||
(file-name-nondirectory buffer-file-name)))
|
||
(previous-dir/file)
|
||
(t
|
||
(cons default-directory nil))))
|
||
|
||
|
||
;;; (COMINT-CHECK-SOURCE fname)
|
||
;;;============================================================================
|
||
;;; Prior to loading or compiling (or otherwise processing) a file (in the CMU
|
||
;;; process-in-a-buffer modes), this function can be called on the filename.
|
||
;;; If the file is loaded into a buffer, and the buffer is modified, the user
|
||
;;; is queried to see if he wants to save the buffer before proceeding with
|
||
;;; the load or compile.
|
||
|
||
(defun comint-check-source (fname)
|
||
(let ((buff (get-file-buffer fname)))
|
||
(if (and buff
|
||
(buffer-modified-p buff)
|
||
(y-or-n-p (format "Save buffer %s first? "
|
||
(buffer-name buff))))
|
||
;; save BUFF.
|
||
(let ((old-buffer (current-buffer)))
|
||
(set-buffer buff)
|
||
(save-buffer)
|
||
(set-buffer old-buffer)))))
|
||
|
||
|
||
;;; (COMINT-GET-SOURCE prompt prev-dir/file source-modes mustmatch-p)
|
||
;;;============================================================================
|
||
;;; COMINT-GET-SOURCE is used to prompt for filenames in command-interpreter
|
||
;;; commands that process source files (like loading or compiling a file).
|
||
;;; It prompts for the filename, provides a default, if there is one,
|
||
;;; and returns the result filename.
|
||
;;;
|
||
;;; See COMINT-SOURCE-DEFAULT for more on determining defaults.
|
||
;;;
|
||
;;; PROMPT is the prompt string. PREV-DIR/FILE is the (directory . file) pair
|
||
;;; from the last source processing command. SOURCE-MODES is a list of major
|
||
;;; modes used to determine what file buffers contain source files. (These
|
||
;;; two arguments are used for determining defaults). If MUSTMATCH-P is true,
|
||
;;; then the filename reader will only accept a file that exists.
|
||
;;;
|
||
;;; A typical use:
|
||
;;; (interactive (comint-get-source "Compile file: " prev-lisp-dir/file
|
||
;;; '(lisp-mode) t))
|
||
|
||
;;; This is pretty stupid about strings. It decides we're in a string
|
||
;;; if there's a quote on both sides of point on the current line.
|
||
(defun comint-extract-string ()
|
||
"Returns string around POINT that starts the current line or nil."
|
||
(save-excursion
|
||
(let* ((point (point))
|
||
(bol (progn (beginning-of-line) (point)))
|
||
(eol (progn (end-of-line) (point)))
|
||
(start (progn (goto-char point)
|
||
(and (search-backward "\"" bol t)
|
||
(1+ (point)))))
|
||
(end (progn (goto-char point)
|
||
(and (search-forward "\"" eol t)
|
||
(1- (point))))))
|
||
(and start end
|
||
(buffer-substring start end)))))
|
||
|
||
(defun comint-get-source (prompt prev-dir/file source-modes mustmatch-p)
|
||
(let* ((def (comint-source-default prev-dir/file source-modes))
|
||
(stringfile (comint-extract-string))
|
||
(sfile-p (and stringfile
|
||
(condition-case ()
|
||
(file-exists-p stringfile)
|
||
(error nil))
|
||
(not (file-directory-p stringfile))))
|
||
(defdir (if sfile-p (file-name-directory stringfile)
|
||
(car def)))
|
||
(deffile (if sfile-p (file-name-nondirectory stringfile)
|
||
(cdr def)))
|
||
(ans (read-file-name (if deffile (format "%s(default %s) "
|
||
prompt deffile)
|
||
prompt)
|
||
defdir
|
||
(concat defdir deffile)
|
||
mustmatch-p)))
|
||
(list (expand-file-name (substitute-in-file-name ans)))))
|
||
|
||
;;; I am somewhat divided on this string-default feature. It seems
|
||
;;; to violate the principle-of-least-astonishment, in that it makes
|
||
;;; the default harder to predict, so you actually have to look and see
|
||
;;; what the default really is before choosing it. This can trip you up.
|
||
;;; On the other hand, it can be useful, I guess. I would appreciate feedback
|
||
;;; on this.
|
||
;;; -Olin
|
||
|
||
|
||
;;; Simple process query facility.
|
||
;;; ===========================================================================
|
||
;;; This function is for commands that want to send a query to the process
|
||
;;; and show the response to the user. For example, a command to get the
|
||
;;; arglist for a Common Lisp function might send a "(arglist 'foo)" query
|
||
;;; to an inferior Common Lisp process.
|
||
;;;
|
||
;;; This simple facility just sends strings to the inferior process and pops
|
||
;;; up a window for the process buffer so you can see what the process
|
||
;;; responds with. We don't do anything fancy like try to intercept what the
|
||
;;; process responds with and put it in a pop-up window or on the message
|
||
;;; line. We just display the buffer. Low tech. Simple. Works good.
|
||
|
||
;;; Send to the inferior process PROC the string STR. Pop-up but do not select
|
||
;;; a window for the inferior process so that its response can be seen.
|
||
(defun comint-proc-query (proc str)
|
||
(let* ((proc-buf (process-buffer proc))
|
||
(proc-mark (process-mark proc)))
|
||
(display-buffer proc-buf)
|
||
(set-buffer proc-buf) ; but it's not the selected *window*
|
||
(let ((proc-win (get-buffer-window proc-buf))
|
||
(proc-pt (marker-position proc-mark)))
|
||
(comint-send-string proc str) ; send the query
|
||
(accept-process-output proc) ; wait for some output
|
||
;; Try to position the proc window so you can see the answer.
|
||
;; This is bogus code. If you delete the (sit-for 0), it breaks.
|
||
;; I don't know why. Wizards invited to improve it.
|
||
(if (not (pos-visible-in-window-p proc-pt proc-win))
|
||
(let ((opoint (window-point proc-win)))
|
||
(set-window-point proc-win proc-mark) (sit-for 0)
|
||
(if (not (pos-visible-in-window-p opoint proc-win))
|
||
(push-mark opoint)
|
||
(set-window-point proc-win opoint)))))))
|
||
|
||
|
||
;;; Filename completion in a buffer
|
||
;;; ===========================================================================
|
||
;;; Useful completion functions, courtesy of the Ergo group.
|
||
|
||
;;; Three commands:
|
||
;;; comint-dynamic-complete Complete filename at point.
|
||
;;; comint-dynamic-list-completions List completions in help buffer.
|
||
;;; comint-replace-by-expanded-filename Expand and complete filename at point;
|
||
;;; replace with expanded/completed name.
|
||
|
||
;;; These are not installed in the comint-mode keymap. But they are
|
||
;;; available for people who want them. Shell-mode installs them:
|
||
;;; (define-key cmushell-mode-map "\t" 'comint-dynamic-complete)
|
||
;;; (define-key cmushell-mode-map "\M-?" 'comint-dynamic-list-completions)))
|
||
;;;
|
||
;;; Commands like this are fine things to put in load hooks if you
|
||
;;; want them present in specific modes.
|
||
|
||
|
||
(defun comint-match-partial-pathname ()
|
||
"Returns the filename at point or causes an error."
|
||
(save-excursion
|
||
(if (re-search-backward "[^~/A-Za-z0-9---_.$#,=]" nil 'move)
|
||
(forward-char 1))
|
||
;; Anchor the search forwards.
|
||
(if (not (looking-at "[~/A-Za-z0-9---_.$#,=]")) (error ""))
|
||
(re-search-forward "[~/A-Za-z0-9---_.$#,=]+")
|
||
(substitute-in-file-name
|
||
(buffer-substring (match-beginning 0) (match-end 0)))))
|
||
|
||
|
||
(defun comint-replace-by-expanded-filename ()
|
||
"Expand the filename at point.
|
||
Replace the filename with an expanded, canonicalised, and completed
|
||
replacement.
|
||
\"Expanded\" means environment variables (e.g., $HOME) and ~'s are
|
||
replaced with the corresponding directories. \"Canonicalised\" means ..
|
||
and \. are removed, and the filename is made absolute instead of relative.
|
||
See functions expand-file-name and substitute-in-file-name. See also
|
||
comint-dynamic-complete."
|
||
(interactive)
|
||
(let* ((pathname (comint-match-partial-pathname))
|
||
(pathdir (file-name-directory pathname))
|
||
(pathnondir (file-name-nondirectory pathname))
|
||
(completion (file-name-completion pathnondir
|
||
(or pathdir default-directory))))
|
||
(cond ((null completion)
|
||
(message "No completions of %s" pathname)
|
||
(ding))
|
||
((eql completion t)
|
||
(message "Unique completion"))
|
||
(t ; this means a string was returned.
|
||
(delete-region (match-beginning 0) (match-end 0))
|
||
(insert (expand-file-name (concat pathdir completion)))))))
|
||
|
||
|
||
(defun comint-dynamic-complete ()
|
||
"Dynamically complete the filename at point.
|
||
This function is similar to `comint-replace-by-expanded-filename', except
|
||
that it won't change parts of the filename already entered in the buffer;
|
||
it just adds completion characters to the end of the filename."
|
||
(interactive)
|
||
(let* ((pathname (comint-match-partial-pathname))
|
||
(pathdir (file-name-directory pathname))
|
||
(pathnondir (file-name-nondirectory pathname))
|
||
(completion (file-name-completion pathnondir
|
||
(or pathdir default-directory))))
|
||
(cond ((null completion)
|
||
(message "No completions of %s" pathname)
|
||
(ding))
|
||
((eql completion t)
|
||
(message "Unique completion"))
|
||
(t ; this means a string was returned.
|
||
(goto-char (match-end 0))
|
||
(insert (substring completion (length pathnondir)))))))
|
||
|
||
(defun comint-dynamic-list-completions ()
|
||
"List in help buffer all possible completions of the filename at point."
|
||
(interactive)
|
||
(let* ((pathname (comint-match-partial-pathname))
|
||
(pathdir (file-name-directory pathname))
|
||
(pathnondir (file-name-nondirectory pathname))
|
||
(completions
|
||
(file-name-all-completions pathnondir
|
||
(or pathdir default-directory))))
|
||
(cond ((null completions)
|
||
(message "No completions of %s" pathname)
|
||
(ding))
|
||
(t
|
||
(let ((conf (current-window-configuration)))
|
||
(with-output-to-temp-buffer "*Help*"
|
||
(display-completion-list completions))
|
||
(sit-for 0)
|
||
(message "Hit space to flush")
|
||
(let ((ch (read-event)))
|
||
(if (eq ch ?\ )
|
||
(set-window-configuration conf)
|
||
(setq unread-command-events (list ch)))))))))
|
||
|
||
;;; Converting process modes to use comint mode
|
||
;;; ===========================================================================
|
||
;;; The code in the Emacs 19 distribution has all been modified to use comint
|
||
;;; where needed. However, there are `third-party' packages out there that
|
||
;;; still use the old shell mode. Here's a guide to conversion.
|
||
;;;
|
||
;;; Renaming variables
|
||
;;; Most of the work is renaming variables and functions. These are the common
|
||
;;; ones:
|
||
;;; Local variables:
|
||
;;; last-input-start comint-last-input-start
|
||
;;; last-input-end comint-last-input-end
|
||
;;; shell-prompt-pattern comint-prompt-regexp
|
||
;;; shell-set-directory-error-hook <no equivalent>
|
||
;;; Miscellaneous:
|
||
;;; shell-set-directory <unnecessary>
|
||
;;; shell-mode-map comint-mode-map
|
||
;;; Commands:
|
||
;;; shell-send-input comint-send-input
|
||
;;; shell-send-eof comint-delchar-or-maybe-eof
|
||
;;; kill-shell-input comint-kill-input
|
||
;;; interrupt-shell-subjob comint-interrupt-subjob
|
||
;;; stop-shell-subjob comint-stop-subjob
|
||
;;; quit-shell-subjob comint-quit-subjob
|
||
;;; kill-shell-subjob comint-kill-subjob
|
||
;;; kill-output-from-shell comint-kill-output
|
||
;;; show-output-from-shell comint-show-output
|
||
;;; copy-last-shell-input Use comint-previous-input/comint-next-input
|
||
;;;
|
||
;;; SHELL-SET-DIRECTORY is gone, its functionality taken over by
|
||
;;; SHELL-DIRECTORY-TRACKER, the shell mode's comint-input-sentinel.
|
||
;;; Comint mode does not provide functionality equivalent to
|
||
;;; shell-set-directory-error-hook; it is gone.
|
||
;;;
|
||
;;; comint-last-input-start is provided for modes which want to munge
|
||
;;; the buffer after input is sent, perhaps because the inferior
|
||
;;; insists on echoing the input. The LAST-INPUT-START variable in
|
||
;;; the old shell package was used to implement a history mechanism,
|
||
;;; but you should think twice before using comint-last-input-start
|
||
;;; for this; the input history ring often does the job better.
|
||
;;;
|
||
;;; If you are implementing some process-in-a-buffer mode, called foo-mode, do
|
||
;;; *not* create the comint-mode local variables in your foo-mode function.
|
||
;;; This is not modular. Instead, call comint-mode, and let *it* create the
|
||
;;; necessary comint-specific local variables. Then create the
|
||
;;; foo-mode-specific local variables in foo-mode. Set the buffer's keymap to
|
||
;;; be foo-mode-map, and its mode to be foo-mode. Set the comint-mode hooks
|
||
;;; (comint-prompt-regexp, comint-input-filter, comint-input-sentinel,
|
||
;;; comint-get-old-input) that need to be different from the defaults. Call
|
||
;;; foo-mode-hook, and you're done. Don't run the comint-mode hook yourself;
|
||
;;; comint-mode will take care of it. The following example, from cmushell.el,
|
||
;;; is typical:
|
||
;;;
|
||
;;; (defun shell-mode ()
|
||
;;; (interactive)
|
||
;;; (comint-mode)
|
||
;;; (setq comint-prompt-regexp shell-prompt-pattern)
|
||
;;; (setq major-mode 'shell-mode)
|
||
;;; (setq mode-name "Shell")
|
||
;;; (cond ((not shell-mode-map)
|
||
;;; (setq shell-mode-map (full-copy-sparse-keymap comint-mode-map))
|
||
;;; (define-key shell-mode-map "\M-\t" 'comint-dynamic-complete)
|
||
;;; (define-key shell-mode-map "\M-?"
|
||
;;; 'comint-dynamic-list-completions)))
|
||
;;; (use-local-map shell-mode-map)
|
||
;;; (make-local-variable 'shell-directory-stack)
|
||
;;; (setq shell-directory-stack nil)
|
||
;;; (setq comint-input-sentinel 'shell-directory-tracker)
|
||
;;; (run-hooks 'shell-mode-hook))
|
||
;;;
|
||
;;;
|
||
;;; Note that make-comint is different from make-shell in that it
|
||
;;; doesn't have a default program argument. If you give make-shell
|
||
;;; a program name of NIL, it cleverly chooses one of explicit-shell-name,
|
||
;;; $ESHELL, $SHELL, or /bin/sh. If you give make-comint a program argument
|
||
;;; of NIL, it barfs. Adjust your code accordingly...
|
||
;;;
|
||
|
||
;;; Do the user's customisation...
|
||
|
||
(defvar comint-load-hook nil
|
||
"This hook is run when comint is loaded in.
|
||
This is a good place to put keybindings.")
|
||
|
||
(run-hooks 'comint-load-hook)
|
||
|
||
;;; Change log:
|
||
;;; 9/12/89
|
||
;;; - Souped up the filename expansion procedures.
|
||
;;; Doc strings are much clearer and more detailed.
|
||
;;; Fixed a bug where doing a filename completion when the point
|
||
;;; was in the middle of the filename instead of at the end would lose.
|
||
;;;
|
||
;;; 2/17/90
|
||
;;; - Souped up the command history stuff so that text inserted
|
||
;;; by comint-previous-input-matching is removed by following
|
||
;;; command history recalls. comint-next/previous-input-matching
|
||
;;; is now much more smoothly integrated w/the command history stuff.
|
||
;;; - Added comint-eol-on-send flag and comint-input-sender hook.
|
||
;;; Comint-input-sender based on code contributed by Jeff Peck
|
||
;;; (peck@sun.com).
|
||
;;;
|
||
;;; 3/13/90 ccm@cmu.cs.edu
|
||
;;; - Added comint-previous-similar-input for looking up similar inputs.
|
||
;;; - Added comint-send-and-get-output to allow snarfing input from
|
||
;;; buffer.
|
||
;;; - Added the ability to pick up a source file by positioning over
|
||
;;; a string in comint-get-source.
|
||
;;; - Added add-hook to make it a little easier for the user to use
|
||
;;; multiple hooks.
|
||
;;;
|
||
;;; 5/22/90 shivers
|
||
;;; - Moved Chris' multiplexed ipc stuff to comint-ipc.el.
|
||
;;; - Altered Chris' comint-get-source string feature. The string
|
||
;;; is only offered as a default if it names an existing file.
|
||
;;; - Changed comint-exec to directly crank up the process, instead
|
||
;;; of calling the env program. This made background.el happy.
|
||
;;; - Added new buffer-local var comint-ptyp. The problem is that
|
||
;;; the signalling functions don't work as advertised. If you are
|
||
;;; communicating via pipes, the CURRENT-GROUP arg is supposed to
|
||
;;; be ignored, but, unfortunately it seems to be the case that you
|
||
;;; must pass a NIL for this arg in the pipe case. COMINT-PTYP
|
||
;;; is a flag that tells whether the process is communicating
|
||
;;; via pipes or a pty. The comint signalling functions use it
|
||
;;; to determine the necessary CURRENT-GROUP arg value. The bug
|
||
;;; has been reported to the Gnu folks.
|
||
;;; - comint-dynamic-complete flushes the help window if you hit space
|
||
;;; after you execute it.
|
||
;;; - Added functions comint-send-string, comint-send-region and var
|
||
;;; comint-input-chunk-size. comint-send-string tries to prevent processes
|
||
;;; from hanging when you send them long strings by breaking them into
|
||
;;; chunks and allowing process output between chunks. I got the idea from
|
||
;;; Eero Simoncelli's Common Lisp package. Note that using
|
||
;;; comint-send-string means that the process buffer's contents can change
|
||
;;; during a call! If you depend on process output only happening between
|
||
;;; toplevel commands, this could be a problem. In such a case, use
|
||
;;; process-send-string instead. If this is a problem for people, I'd like
|
||
;;; to hear about it.
|
||
;;; - Added comint-proc-query as a simple mechanism for commands that
|
||
;;; want to query an inferior process and display its response. For a
|
||
;;; typical use, see lisp-show-arglist in cmulisp.el.
|
||
;;; - Added constant comint-version, which is now "2.01".
|
||
;;;
|
||
;;; 6/14/90 shivers
|
||
;;; - Had comint-update-env defined twice. Removed extra copy. Also
|
||
;;; renamed mem to be comint-mem, for modularity. The duplication
|
||
;;; was reported by Michael Meissner.
|
||
;;; 6/16/90 shivers
|
||
;;; - Emacs has two different mechanisms for maintaining the process
|
||
;;; environment, determined at compile time by the MAINTAIN-ENVIRONMENT
|
||
;;; #define. One uses the process-environment global variable, and
|
||
;;; one uses a getenv/setenv interface. comint-exec assumed the
|
||
;;; process-environment interface; it has been generalised (with
|
||
;;; comint-exec-1) to handle both cases. Pretty bogus. We could,
|
||
;;; of course, skip all this and just use the etc/env program to
|
||
;;; handle the environment tweaking, but that obscures process
|
||
;;; queries that other modules (like background.el) depend on. etc/env
|
||
;;; is also fairly bogus. This bug, and some of the fix code was
|
||
;;; reported by Dan Pierson.
|
||
;;;
|
||
;;; 9/5/90 shivers
|
||
;;; - Changed make-variable-buffer-local's to make-local-variable's.
|
||
;;; This leaves non-comint-mode buffers alone. Stephane Payrard
|
||
;;; reported the sloppy useage.
|
||
;;; - You can now go from comint-previous-similar-input to
|
||
;;; comint-previous-input with no problem.
|
||
;;;
|
||
;;; 12/21/90 shivers
|
||
;;; - Added a condition-case to comint-get-source. Bogus strings
|
||
;;; beginning with ~ were making the file-exists-p barf.
|
||
;;; - Added "=" to the set of chars recognised by file completion
|
||
;;; as constituting a filename.
|
||
;;;
|
||
;;; 1/90 shivers
|
||
;;; These changes comprise release 2.02:
|
||
;;; - Removed the kill-all-local-variables in comint-mode. This
|
||
;;; made it impossible for client modes to set things before calling
|
||
;;; comint-mode. (In particular, it messed up ilisp.el) In general,
|
||
;;; the client mode should be responsible for a k-a-l-v's.
|
||
;;; - Fixed comint-match-partial-pathname so that it works in
|
||
;;; more cases: if the filename begins at the start-of-buffer;
|
||
;;; if point is on the first char of the filename. Just a question
|
||
;;; of getting the tricky bits right.
|
||
;;; - Added a hook, comint-exec-hook that is run each time a process
|
||
;;; is cranked up. Useful for things like process-kill-without-query.
|
||
;;;
|
||
;;; These two were pointed out by tale:
|
||
;;; - Improved the doc string in comint-send-input a little bit.
|
||
;;; - Tweaked make-comint to check process status with comint-check-proc
|
||
;;; instead of equivalent inline code.
|
||
;;;
|
||
;;; - Prompt-search history commands have been commented out. I never
|
||
;;; liked them; I don't think anyone used them.
|
||
;;; - Made comint-exec-hook a local var, as it should have been.
|
||
;;; (This way, for instance, you can have cmushell procs kill-w/o-query,
|
||
;;; but let Scheme procs be default.)
|
||
;;;
|
||
;;; 7/91 Shivers
|
||
;;; - Souped up comint-read-noecho with an optional argument, STARS.
|
||
;;; Suggested by mjlx@EAGLE.CNSF.CORNELL.EDU.
|
||
;;; - Moved comint-previous-input-matching from C-c r to C-M-r.
|
||
;;; C-c <letter> bindings are reserved for the user.
|
||
;;; These bindings were done by Jim Blandy.
|
||
;;; These changes comprise version 2.03.
|
||
|
||
(provide 'comint)
|
||
|
||
;;; comint.el ends here
|