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1 ;;; xscheme.el --- run Scheme under Emacs
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2 ;; Keywords: languages, lisp
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3
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4 ;; Copyright (C) 1986, 1987 Free Software Foundation, Inc.
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5
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6 ;; This file is part of XEmacs.
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7
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8 ;; XEmacs is free software; you can redistribute it and/or modify it
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9 ;; under the terms of the GNU General Public License as published by
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10 ;; the Free Software Foundation; either version 2, or (at your option)
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11 ;; any later version.
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12
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13 ;; XEmacs is distributed in the hope that it will be useful, but
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14 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 ;; General Public License for more details.
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17
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18 ;; You should have received a copy of the GNU General Public License
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19 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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20 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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21
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22 ;;; Synched up with: Not synched with FSF.
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23
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24 ;;; Requires C-Scheme release 5 or later
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25 ;;; Changes to Control-G handler require runtime version 13.85 or later
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26
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2
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27 ;;; $Header: /afs/informatik.uni-tuebingen.de/local/web/xemacs/xemacs-cvs/XEmacs/xemacs-19/lisp/packages/xscheme.el,v 1.1.1.2 1996/12/18 03:45:01 steve Exp $
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0
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28
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29 (require 'scheme)
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30
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31 ;;;###autoload
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32 (defvar scheme-program-name "scheme"
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33 "*Program invoked by the `run-scheme' command.")
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34
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35 ;;;###autoload
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36 (defvar scheme-band-name nil
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37 "*Band loaded by the `run-scheme' command.")
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38
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39 ;;;###autoload
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40 (defvar scheme-program-arguments nil
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41 "*Arguments passed to the Scheme program by the `run-scheme' command.")
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42
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43 (defvar xscheme-allow-pipelined-evaluation t
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44 "If non-nil, an expression may be transmitted while another is evaluating.
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45 Otherwise, attempting to evaluate an expression before the previous expression
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46 has finished evaluating will signal an error.")
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47
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48 (defvar default-xscheme-runlight
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49 '(": " xscheme-runlight-string)
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50 "Default global (shared) xscheme-runlight modeline format.")
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51
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52 (defvar xscheme-startup-message
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53 "This is the Scheme process buffer.
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54 Type \\[advertised-xscheme-send-previous-expression] to evaluate the expression before point.
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55 Type \\[xscheme-send-control-g-interrupt] to abort evaluation.
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56 Type \\[describe-mode] for more information.
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57
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58 "
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59 "String to insert into Scheme process buffer first time it is started.
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60 Is processed with `substitute-command-keys' first.")
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61
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62 (defvar xscheme-signal-death-message nil
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63 "If non-nil, causes a message to be generated when the Scheme process dies.")
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64
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65 (defvar xscheme-process-name "*scheme*"
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66 "*Process created by the `run-scheme' command.")
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67
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68 (defvar xscheme-buffer-name "*scheme*"
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69 "*Buffer created by the `run-scheme' command.")
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70
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71 (defun xscheme-evaluation-commands (keymap)
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72 (define-key keymap "\e\C-x" 'xscheme-send-definition)
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73 (define-key keymap "\C-x\C-e" 'advertised-xscheme-send-previous-expression)
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74 (define-key keymap "\eo" 'xscheme-send-buffer)
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75 (define-key keymap "\ez" 'xscheme-send-definition)
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76 (define-key keymap "\e\C-m" 'xscheme-send-previous-expression)
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77 (define-key keymap "\e\C-z" 'xscheme-send-region))
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78
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79 (defun xscheme-interrupt-commands (keymap)
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80 (define-key keymap "\C-c\C-s" 'xscheme-select-process-buffer)
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81 (define-key keymap "\C-c\C-b" 'xscheme-send-breakpoint-interrupt)
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82 (define-key keymap "\C-c\C-c" 'xscheme-send-control-g-interrupt)
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83 (define-key keymap "\C-c\C-u" 'xscheme-send-control-u-interrupt)
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84 (define-key keymap "\C-c\C-x" 'xscheme-send-control-x-interrupt))
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85
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86 (xscheme-evaluation-commands scheme-mode-map)
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87 (xscheme-interrupt-commands scheme-mode-map)
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88
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89 ;;;###autoload
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90 (defun run-scheme (command-line)
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91 "Run an inferior Scheme process.
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92 Output goes to the buffer `*scheme*'.
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93 With argument, asks for a command line."
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94 (interactive
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95 (list (read-scheme-command-line current-prefix-arg)))
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96 (scheme-start command-line xscheme-process-name xscheme-buffer-name))
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97
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98 (defun reset-scheme ()
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99 "Reset the Scheme process."
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100 (interactive)
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101 (let ((process (get-process xscheme-process-name)))
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102 (cond ((or (not process)
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103 (not (eq (process-status process) 'run))
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104 (yes-or-no-p
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105 "The Scheme process is running, are you SURE you want to reset it? "))
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106 (message "Resetting Scheme process...")
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107 (if process
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108 (progn
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109 (kill-process process t)
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110 (delete-process process)))
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111 (xscheme-start-process xscheme-process-command-line
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112 xscheme-process-name
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113 xscheme-buffer-name)
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114 (message "Resetting Scheme process...done")))))
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115
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116 (defun scheme-start (command-line process-name buffer-name &optional avoid-set)
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117 (if (not avoid-set)
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118 (setq-default xscheme-process-command-line command-line))
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119 (switch-to-buffer
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120 (xscheme-start-process command-line process-name buffer-name))
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121 (make-local-variable 'xscheme-process-command-line)
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122 (setq xscheme-process-command-line command-line))
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123
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124 (defun read-scheme-command-line (arg)
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125 (let ((default
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126 (or xscheme-process-command-line
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127 (xscheme-default-command-line))))
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128 (if arg
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129 (read-string "Run Scheme: " default)
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130 default)))
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131
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132 (defun xscheme-default-command-line ()
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133 (concat scheme-program-name " -emacs"
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134 (if scheme-program-arguments
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135 (concat " " scheme-program-arguments)
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136 "")
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137 (if scheme-band-name
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138 (concat " -band " scheme-band-name)
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139 "")))
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140
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141 ;;;; Multiple Scheme buffer management commands
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142
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143 (defun start-scheme (buffer-name &optional globally)
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144 "Choose a scheme interaction buffer, or create a new one."
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145 ;; (interactive "BScheme interaction buffer: \nP")
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146 (interactive
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147 (list (read-buffer "Scheme interaction buffer: "
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148 xscheme-buffer-name
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149 nil)
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150 current-prefix-arg))
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151 (let ((buffer (get-buffer-create buffer-name)))
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152 (let ((process (get-buffer-process buffer)))
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153 (if process
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154 (switch-to-buffer buffer)
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155 (if (or (not (buffer-file-name buffer))
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156 (yes-or-no-p (concat "Buffer "
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157 (buffer-name buffer)
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158 " contains file "
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159 (buffer-file-name buffer)
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160 "; start scheme in it? ")))
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161 (progn
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162 (scheme-start (read-scheme-command-line t)
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163 buffer-name
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164 buffer-name)
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165 (if globally
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166 (global-set-scheme-interaction-buffer buffer-name)))
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167 (message "start-scheme aborted"))))))
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168
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169 (fset 'select-scheme 'start-scheme)
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170
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171 (defun global-set-scheme-interaction-buffer (buffer-name)
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172 "Set the default scheme interaction buffer."
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173 (interactive
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174 (list (read-buffer "Scheme interaction buffer: "
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175 xscheme-buffer-name
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176 t)))
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177 (let ((process-name (verify-xscheme-buffer buffer-name nil)))
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178 (setq-default xscheme-buffer-name buffer-name)
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179 (setq-default xscheme-process-name process-name)
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180 (setq-default xscheme-runlight-string
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181 (save-excursion (set-buffer buffer-name)
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182 xscheme-runlight-string))
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183 (setq-default xscheme-runlight
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184 (if (eq (process-status process-name) 'run)
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185 default-xscheme-runlight
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186 ""))))
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187
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188 (defun local-set-scheme-interaction-buffer (buffer-name)
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189 "Set the scheme interaction buffer for the current buffer."
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190 (interactive
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191 (list (read-buffer "Scheme interaction buffer: "
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192 xscheme-buffer-name
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193 t)))
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194 (let ((process-name (verify-xscheme-buffer buffer-name t)))
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195 (make-local-variable 'xscheme-buffer-name)
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196 (setq xscheme-buffer-name buffer-name)
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197 (make-local-variable 'xscheme-process-name)
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198 (setq xscheme-process-name process-name)
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199 (make-local-variable 'xscheme-runlight)
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200 (setq xscheme-runlight (save-excursion (set-buffer buffer-name)
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201 xscheme-runlight))))
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202
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203 (defun local-clear-scheme-interaction-buffer ()
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204 "Make the current buffer use the default scheme interaction buffer."
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205 (interactive)
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206 (if (xscheme-process-buffer-current-p)
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207 (error "Cannot change the interaction buffer of an interaction buffer"))
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208 (kill-local-variable 'xscheme-buffer-name)
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209 (kill-local-variable 'xscheme-process-name)
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210 (kill-local-variable 'xscheme-runlight))
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211
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212 (defun verify-xscheme-buffer (buffer-name localp)
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213 (if (and localp (xscheme-process-buffer-current-p))
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214 (error "Cannot change the interaction buffer of an interaction buffer"))
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215 (let* ((buffer (get-buffer buffer-name))
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216 (process (and buffer (get-buffer-process buffer))))
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217 (cond ((not buffer)
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218 (error "Buffer does not exist" buffer-name))
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219 ((not process)
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220 (error "Buffer is not a scheme interaction buffer" buffer-name))
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221 (t
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222 (save-excursion
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223 (set-buffer buffer)
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224 (if (not (xscheme-process-buffer-current-p))
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225 (error "Buffer is not a scheme interaction buffer"
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226 buffer-name)))
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227 (process-name process)))))
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228
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229 ;;;; Interaction Mode
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230
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231 (defun scheme-interaction-mode (&optional preserve)
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232 "Major mode for interacting with the inferior Scheme process.
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233 Like scheme-mode except that:
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234
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235 \\[advertised-xscheme-send-previous-expression] sends the expression before point to the Scheme process as input
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236 \\[xscheme-yank-pop] yanks an expression previously sent to Scheme
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237 \\[xscheme-yank-push] yanks an expression more recently sent to Scheme
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238
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239 All output from the Scheme process is written in the Scheme process
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240 buffer, which is initially named \"*scheme*\". The result of
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241 evaluating a Scheme expression is also printed in the process buffer,
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242 preceded by the string \";Value: \" to highlight it. If the process
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243 buffer is not visible at that time, the value will also be displayed
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244 in the minibuffer. If an error occurs, the process buffer will
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245 automatically pop up to show you the error message.
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246
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247 While the Scheme process is running, the modelines of all buffers in
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248 scheme-mode are modified to show the state of the process. The
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249 possible states and their meanings are:
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250
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251 input waiting for input
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252 run evaluating
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253 gc garbage collecting
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254
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255 The process buffer's modeline contains additional information where
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256 the buffer's name is normally displayed: the command interpreter level
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257 and type.
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258
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259 Scheme maintains a stack of command interpreters. Every time an error
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260 or breakpoint occurs, the current command interpreter is pushed on the
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261 command interpreter stack, and a new command interpreter is started.
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262 One example of why this is done is so that an error that occurs while
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263 you are debugging another error will not destroy the state of the
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264 initial error, allowing you to return to it after the second error has
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265 been fixed.
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266
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267 The command interpreter level indicates how many interpreters are in
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268 the command interpreter stack. It is initially set to one, and it is
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269 incremented every time that stack is pushed, and decremented every
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270 time it is popped. The following commands are useful for manipulating
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271 the command interpreter stack:
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272
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273 \\[xscheme-send-breakpoint-interrupt] pushes the stack once
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274 \\[xscheme-send-control-u-interrupt] pops the stack once
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275 \\[xscheme-send-control-g-interrupt] pops everything off
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276 \\[xscheme-send-control-x-interrupt] aborts evaluation, doesn't affect stack
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277
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278 Some possible command interpreter types and their meanings are:
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279
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280 [Evaluator] read-eval-print loop for evaluating expressions
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281 [Debugger] single character commands for debugging errors
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282 [Where] single character commands for examining environments
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283
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284 Starting with release 6.2 of Scheme, the latter two types of command
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285 interpreters will change the major mode of the Scheme process buffer
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286 to scheme-debugger-mode , in which the evaluation commands are
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287 disabled, and the keys which normally self insert instead send
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288 themselves to the Scheme process. The command character ? will list
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289 the available commands.
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290
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291 For older releases of Scheme, the major mode will be
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292 scheme-interaction-mode , and the command characters must be sent as
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293 if they were expressions.
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294
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295 Commands:
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296 Delete converts tabs to spaces as it moves back.
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297 Blank lines separate paragraphs. Semicolons start comments.
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298 \\{scheme-interaction-mode-map}
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299
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300 Entry to this mode calls the value of scheme-interaction-mode-hook
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301 with no args, if that value is non-nil.
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302 Likewise with the value of scheme-mode-hook.
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303 scheme-interaction-mode-hook is called after scheme-mode-hook."
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304
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305 (interactive "P")
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306 (if (not preserve)
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307 (let ((previous-mode major-mode))
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308 (kill-all-local-variables)
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309 (make-local-variable 'xscheme-previous-mode)
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310 (make-local-variable 'xscheme-buffer-name)
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311 (make-local-variable 'xscheme-process-name)
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312 (make-local-variable 'xscheme-previous-process-state)
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313 (make-local-variable 'xscheme-runlight-string)
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314 (make-local-variable 'xscheme-runlight)
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315 (setq xscheme-previous-mode previous-mode)
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316 (let ((buffer (current-buffer)))
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317 (setq xscheme-buffer-name (buffer-name buffer))
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318 (let ((process (get-buffer-process buffer)))
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319 (if (not process)
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320 (setq xscheme-previous-process-state (cons nil nil))
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321 (progn
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322 (setq xscheme-process-name (process-name process))
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323 (setq xscheme-previous-process-state
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324 (cons (process-filter process)
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325 (process-sentinel process)))
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326 (xscheme-process-filter-initialize t)
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327 (xscheme-modeline-initialize xscheme-buffer-name)
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328 (set-process-sentinel process 'xscheme-process-sentinel)
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329 (set-process-filter process 'xscheme-process-filter)))))))
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330 (scheme-interaction-mode-initialize)
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331 (scheme-mode-variables)
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332 (run-hooks 'scheme-mode-hook 'scheme-interaction-mode-hook))
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333
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334 (defun exit-scheme-interaction-mode ()
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335 "Take buffer out of scheme interaction mode"
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336 (interactive)
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337 (if (not (eq major-mode 'scheme-interaction-mode))
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338 (error "Buffer not in scheme interaction mode"))
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339 (let ((previous-state xscheme-previous-process-state))
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340 (funcall xscheme-previous-mode)
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341 (let ((process (get-buffer-process (current-buffer))))
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342 (if process
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343 (progn
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344 (if (eq (process-filter process) 'xscheme-process-filter)
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345 (set-process-filter process (car previous-state)))
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346 (if (eq (process-sentinel process) 'xscheme-process-sentinel)
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347 (set-process-sentinel process (cdr previous-state))))))))
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348
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349 (defun scheme-interaction-mode-initialize ()
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350 (use-local-map scheme-interaction-mode-map)
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351 (setq major-mode 'scheme-interaction-mode)
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352 (setq mode-name "Scheme Interaction"))
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353
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354 (defun scheme-interaction-mode-commands (keymap)
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355 (define-key keymap "\C-c\C-m" 'xscheme-send-current-line)
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356 (define-key keymap "\C-c\C-p" 'xscheme-send-proceed)
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357 (define-key keymap "\C-c\C-y" 'xscheme-yank)
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358 (define-key keymap "\ep" 'xscheme-yank-pop)
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359 (define-key keymap "\en" 'xscheme-yank-push))
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360
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361 (defvar scheme-interaction-mode-map nil)
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362 (if (not scheme-interaction-mode-map)
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363 (progn
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364 (setq scheme-interaction-mode-map (make-keymap))
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365 (scheme-mode-commands scheme-interaction-mode-map)
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366 (xscheme-interrupt-commands scheme-interaction-mode-map)
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367 (xscheme-evaluation-commands scheme-interaction-mode-map)
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368 (scheme-interaction-mode-commands scheme-interaction-mode-map)))
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369
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|
370 (defun xscheme-enter-interaction-mode ()
|
|
|
371 (save-excursion
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|
|
372 (set-buffer (xscheme-process-buffer))
|
|
|
373 (if (not (eq major-mode 'scheme-interaction-mode))
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|
374 (if (eq major-mode 'scheme-debugger-mode)
|
|
|
375 (scheme-interaction-mode-initialize)
|
|
|
376 (scheme-interaction-mode t)))))
|
|
|
377
|
|
|
378 (fset 'advertised-xscheme-send-previous-expression
|
|
|
379 'xscheme-send-previous-expression)
|
|
|
380
|
|
|
381 ;;;; Debugger Mode
|
|
|
382
|
|
|
383 (defun scheme-debugger-mode ()
|
|
|
384 "Major mode for executing the Scheme debugger.
|
|
|
385 Like scheme-mode except that the evaluation commands
|
|
|
386 are disabled, and characters that would normally be self inserting are
|
|
|
387 sent to the Scheme process instead. Typing ? will show you which
|
|
|
388 characters perform useful functions.
|
|
|
389
|
|
|
390 Commands:
|
|
|
391 \\{scheme-debugger-mode-map}"
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|
|
392 (error "Illegal entry to scheme-debugger-mode"))
|
|
|
393
|
|
|
394 (defun scheme-debugger-mode-initialize ()
|
|
|
395 (use-local-map scheme-debugger-mode-map)
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|
396 (setq major-mode 'scheme-debugger-mode)
|
|
|
397 (setq mode-name "Scheme Debugger"))
|
|
|
398
|
|
|
399 (defun scheme-debugger-mode-commands (keymap)
|
|
|
400 (let ((char ? ))
|
|
|
401 (while (< char 127)
|
|
|
402 (define-key keymap (char-to-string char) 'scheme-debugger-self-insert)
|
|
|
403 (setq char (1+ char)))))
|
|
|
404
|
|
|
405 (defvar scheme-debugger-mode-map nil)
|
|
|
406 (if (not scheme-debugger-mode-map)
|
|
|
407 (progn
|
|
|
408 (setq scheme-debugger-mode-map (make-keymap))
|
|
|
409 (scheme-mode-commands scheme-debugger-mode-map)
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|
|
410 (xscheme-interrupt-commands scheme-debugger-mode-map)
|
|
|
411 (scheme-debugger-mode-commands scheme-debugger-mode-map)))
|
|
|
412
|
|
|
413 (defun scheme-debugger-self-insert ()
|
|
|
414 "Transmit this character to the Scheme process."
|
|
|
415 (interactive)
|
|
|
416 (xscheme-send-char last-command-char))
|
|
|
417
|
|
|
418 (defun xscheme-enter-debugger-mode (prompt-string)
|
|
|
419 (save-excursion
|
|
|
420 (set-buffer (xscheme-process-buffer))
|
|
|
421 (if (not (eq major-mode 'scheme-debugger-mode))
|
|
|
422 (progn
|
|
|
423 (if (not (eq major-mode 'scheme-interaction-mode))
|
|
|
424 (scheme-interaction-mode t))
|
|
|
425 (scheme-debugger-mode-initialize)))))
|
|
|
426
|
|
|
427 (defun xscheme-debugger-mode-p ()
|
|
|
428 (let ((buffer (xscheme-process-buffer)))
|
|
|
429 (and buffer
|
|
|
430 (save-excursion
|
|
|
431 (set-buffer buffer)
|
|
|
432 (eq major-mode 'scheme-debugger-mode)))))
|
|
|
433
|
|
|
434 ;;;; Evaluation Commands
|
|
|
435
|
|
|
436 (defun xscheme-send-string (&rest strings)
|
|
|
437 "Send the string arguments to the Scheme process.
|
|
|
438 The strings are concatenated and terminated by a newline."
|
|
|
439 (cond ((not (xscheme-process-running-p))
|
|
|
440 (if (yes-or-no-p "The Scheme process has died. Reset it? ")
|
|
|
441 (progn
|
|
|
442 (reset-scheme)
|
|
|
443 (xscheme-wait-for-process)
|
|
|
444 (xscheme-send-string-1 strings))))
|
|
|
445 ((xscheme-debugger-mode-p) (error "No sends allowed in debugger mode"))
|
|
|
446 ((and (not xscheme-allow-pipelined-evaluation)
|
|
|
447 xscheme-running-p)
|
|
|
448 (error "No sends allowed while Scheme running"))
|
|
|
449 (t (xscheme-send-string-1 strings))))
|
|
|
450
|
|
|
451 (defun xscheme-send-string-1 (strings)
|
|
|
452 (let ((string (apply 'concat strings)))
|
|
|
453 (xscheme-send-string-2 string)
|
|
|
454 (if (eq major-mode 'scheme-interaction-mode)
|
|
|
455 (xscheme-insert-expression string))))
|
|
|
456
|
|
|
457 (defun xscheme-send-string-2 (string)
|
|
|
458 (let ((process (get-process xscheme-process-name)))
|
|
|
459 (process-send-string process (concat string "\n"))
|
|
|
460 (if (xscheme-process-buffer-current-p)
|
|
|
461 (set-marker (process-mark process) (point)))))
|
|
|
462
|
|
|
463 (defun xscheme-select-process-buffer ()
|
|
|
464 "Select the Scheme process buffer and move to its output point."
|
|
|
465 (interactive)
|
|
|
466 (let ((process (or (get-process xscheme-process-name)
|
|
|
467 (error "No scheme process"))))
|
|
|
468 (let ((buffer (or (process-buffer process) (error "No process buffer"))))
|
|
|
469 (let ((window (get-buffer-window buffer)))
|
|
|
470 (if window
|
|
|
471 (select-window window)
|
|
|
472 (switch-to-buffer buffer))
|
|
|
473 (goto-char (process-mark process))))))
|
|
|
474
|
|
|
475 ;;;; Scheme expressions ring
|
|
|
476
|
|
|
477 (defun xscheme-insert-expression (string)
|
|
|
478 (setq xscheme-expressions-ring (cons string xscheme-expressions-ring))
|
|
|
479 (if (> (length xscheme-expressions-ring) xscheme-expressions-ring-max)
|
|
|
480 (setcdr (nthcdr (1- xscheme-expressions-ring-max) xscheme-expressions-ring) nil))
|
|
|
481 (setq xscheme-expressions-ring-yank-pointer xscheme-expressions-ring))
|
|
|
482
|
|
|
483 (defun xscheme-rotate-yank-pointer (arg)
|
|
|
484 "Rotate the yanking point in the kill ring."
|
|
|
485 (interactive "p")
|
|
|
486 (let ((length (length xscheme-expressions-ring)))
|
|
|
487 (if (zerop length)
|
|
|
488 (error "Scheme expression ring is empty")
|
|
|
489 (setq xscheme-expressions-ring-yank-pointer
|
|
|
490 (let ((index (% (+ arg (- length (length xscheme-expressions-ring-yank-pointer)))
|
|
|
491 length)))
|
|
|
492 (nthcdr (if (< index 0)
|
|
|
493 (+ index length)
|
|
|
494 index)
|
|
|
495 xscheme-expressions-ring))))))
|
|
|
496
|
|
|
497 (defun xscheme-yank (&optional arg)
|
|
|
498 "Insert the most recent expression at point.
|
|
|
499 With just C-U as argument, same but put point in front (and mark at end).
|
|
|
500 With argument n, reinsert the nth most recently sent expression.
|
|
|
501 See also the commands \\[xscheme-yank-pop] and \\[xscheme-yank-push]."
|
|
|
502 (interactive "*P")
|
|
|
503 (xscheme-rotate-yank-pointer (if (listp arg) 0
|
|
|
504 (if (eq arg '-) -1
|
|
|
505 (1- arg))))
|
|
|
506 (push-mark (point))
|
|
|
507 (insert (car xscheme-expressions-ring-yank-pointer))
|
|
|
508 (if (consp arg)
|
|
|
509 (exchange-point-and-mark)))
|
|
|
510
|
|
|
511 ;; Old name, to avoid errors in users' init files.
|
|
|
512
|
|
|
513 (fset 'xscheme-yank-previous-send
|
|
|
514 'xscheme-yank)
|
|
|
515
|
|
|
516 (defun xscheme-yank-pop (arg)
|
|
|
517 "Insert or replace a just-yanked expression with an older expression.
|
|
|
518 If the previous command was not a yank, it yanks.
|
|
|
519 Otherwise, the region contains a stretch of reinserted
|
|
|
520 expression. yank-pop deletes that text and inserts in its
|
|
|
521 place a different expression.
|
|
|
522
|
|
|
523 With no argument, the next older expression is inserted.
|
|
|
524 With argument n, the n'th older expression is inserted.
|
|
|
525 If n is negative, this is a more recent expression.
|
|
|
526
|
|
|
527 The sequence of expressions wraps around, so that after the oldest one
|
|
|
528 comes the newest one."
|
|
|
529 (interactive "*p")
|
|
|
530 (setq this-command 'xscheme-yank)
|
|
|
531 (if (not (eq last-command 'xscheme-yank))
|
|
|
532 (progn
|
|
|
533 (xscheme-yank)
|
|
|
534 (setq arg (- arg 1))))
|
|
|
535 (if (not (= arg 0))
|
|
|
536 (let ((before (< (point) (mark t))))
|
|
|
537 (delete-region (point) (mark t))
|
|
|
538 (xscheme-rotate-yank-pointer arg)
|
|
|
539 (set-mark (point))
|
|
|
540 (insert (car xscheme-expressions-ring-yank-pointer))
|
|
|
541 (if before (exchange-point-and-mark)))))
|
|
|
542
|
|
|
543 (defun xscheme-yank-push (arg)
|
|
|
544 "Insert or replace a just-yanked expression with a more recent expression.
|
|
|
545 If the previous command was not a yank, it yanks.
|
|
|
546 Otherwise, the region contains a stretch of reinserted
|
|
|
547 expression. yank-pop deletes that text and inserts in its
|
|
|
548 place a different expression.
|
|
|
549
|
|
|
550 With no argument, the next more recent expression is inserted.
|
|
|
551 With argument n, the n'th more recent expression is inserted.
|
|
|
552 If n is negative, a less recent expression is used.
|
|
|
553
|
|
|
554 The sequence of expressions wraps around, so that after the oldest one
|
|
|
555 comes the newest one."
|
|
|
556 (interactive "*p")
|
|
|
557 (xscheme-yank-pop (- 0 arg)))
|
|
|
558
|
|
|
559 (defun xscheme-send-region (start end)
|
|
|
560 "Send the current region to the Scheme process.
|
|
|
561 The region is sent terminated by a newline."
|
|
|
562 (interactive "r")
|
|
|
563 (if (xscheme-process-buffer-current-p)
|
|
|
564 (progn (goto-char end)
|
|
|
565 (set-marker (process-mark (get-process xscheme-process-name))
|
|
|
566 end)))
|
|
|
567 (xscheme-send-string (buffer-substring start end)))
|
|
|
568
|
|
|
569 (defun xscheme-send-definition ()
|
|
|
570 "Send the current definition to the Scheme process.
|
|
|
571 If the current line begins with a non-whitespace character,
|
|
|
572 parse an expression from the beginning of the line and send that instead."
|
|
|
573 (interactive)
|
|
|
574 (let ((start nil) (end nil))
|
|
|
575 (save-excursion
|
|
|
576 (end-of-defun)
|
|
|
577 (setq end (point))
|
|
|
578 (if (re-search-backward "^\\s(" nil t)
|
|
|
579 (setq start (point))
|
|
|
580 (error "Can't find definition")))
|
|
|
581 (xscheme-send-region start end)))
|
|
|
582
|
|
|
583 (defun xscheme-send-next-expression ()
|
|
|
584 "Send the expression to the right of `point' to the Scheme process."
|
|
|
585 (interactive)
|
|
|
586 (let ((start (point)))
|
|
|
587 (xscheme-send-region start (save-excursion (forward-sexp) (point)))))
|
|
|
588
|
|
|
589 (defun xscheme-send-previous-expression ()
|
|
|
590 "Send the expression to the left of `point' to the Scheme process."
|
|
|
591 (interactive)
|
|
|
592 (let ((end (point)))
|
|
|
593 (xscheme-send-region (save-excursion (backward-sexp) (point)) end)))
|
|
|
594
|
|
|
595 (defun xscheme-send-current-line ()
|
|
|
596 "Send the current line to the Scheme process.
|
|
|
597 Useful for working with debugging Scheme under adb."
|
|
|
598 (interactive)
|
|
|
599 (let ((line
|
|
|
600 (save-excursion
|
|
|
601 (beginning-of-line)
|
|
|
602 (let ((start (point)))
|
|
|
603 (end-of-line)
|
|
|
604 (buffer-substring start (point))))))
|
|
|
605 (end-of-line)
|
|
|
606 (insert ?\n)
|
|
|
607 (xscheme-send-string-2 line)))
|
|
|
608
|
|
|
609 (defun xscheme-send-buffer ()
|
|
|
610 "Send the current buffer to the Scheme process."
|
|
|
611 (interactive)
|
|
|
612 (if (xscheme-process-buffer-current-p)
|
|
|
613 (error "Not allowed to send this buffer's contents to Scheme"))
|
|
|
614 (xscheme-send-region (point-min) (point-max)))
|
|
|
615
|
|
|
616 (defun xscheme-send-char (char)
|
|
|
617 "Prompt for a character and send it to the Scheme process."
|
|
|
618 (interactive "cCharacter to send: ")
|
|
|
619 (process-send-string xscheme-process-name (char-to-string char)))
|
|
|
620
|
|
|
621 ;;;; Interrupts
|
|
|
622
|
|
|
623 (defun xscheme-send-breakpoint-interrupt ()
|
|
|
624 "Cause the Scheme process to enter a breakpoint."
|
|
|
625 (interactive)
|
|
|
626 (xscheme-send-interrupt ?b nil))
|
|
|
627
|
|
|
628 (defun xscheme-send-proceed ()
|
|
|
629 "Cause the Scheme process to proceed from a breakpoint."
|
|
|
630 (interactive)
|
|
|
631 (process-send-string xscheme-process-name "(proceed)\n"))
|
|
|
632
|
|
|
633 (defun buffer-local-value-cell (buffer name)
|
|
|
634 (let ((pair (assq name (buffer-local-variables (get-buffer buffer)))))
|
|
|
635 (if (not pair)
|
|
|
636 (error "buffer-local-value-cell: Not bound")
|
|
|
637 pair)))
|
|
|
638
|
|
|
639 (defun xscheme-send-control-g-interrupt ()
|
|
|
640 "Cause the Scheme processor to halt and flush input.
|
|
|
641 Control returns to the top level rep loop."
|
|
|
642 (interactive)
|
|
|
643 (let* ((inhibit-quit t)
|
|
|
644 (vcell (buffer-local-value-cell xscheme-buffer-name
|
|
|
645 'xscheme-control-g-disabled-p)))
|
|
|
646 (cond ((not xscheme-control-g-synchronization-p)
|
|
|
647 (interrupt-process xscheme-process-name))
|
|
|
648 ((cdr vcell)
|
|
|
649 (message "Relax..."))
|
|
|
650 (t
|
|
|
651 (rplacd vcell t)
|
|
|
652 (message "Sending C-G interrupt to Scheme...")
|
|
|
653 (interrupt-process xscheme-process-name)
|
|
|
654 (process-send-string xscheme-process-name (char-to-string 0))))))
|
|
|
655
|
|
|
656 (defun xscheme-send-control-u-interrupt ()
|
|
|
657 "Cause the Scheme process to halt, returning to previous rep loop."
|
|
|
658 (interactive)
|
|
|
659 (xscheme-send-interrupt ?u t))
|
|
|
660
|
|
|
661 (defun xscheme-send-control-x-interrupt ()
|
|
|
662 "Cause the Scheme process to halt, returning to current rep loop."
|
|
|
663 (interactive)
|
|
|
664 (xscheme-send-interrupt ?x t))
|
|
|
665
|
|
|
666 ;;; This doesn't really work right -- Scheme just gobbles the first
|
|
|
667 ;;; character in the input. There is no way for us to guarantee that
|
|
|
668 ;;; the argument to this procedure is the first char unless we put
|
|
|
669 ;;; some kind of marker in the input stream.
|
|
|
670
|
|
|
671 (defun xscheme-send-interrupt (char mark-p)
|
|
|
672 "Send a ^A type interrupt to the Scheme process."
|
|
|
673 (interactive "cInterrupt character to send: ")
|
|
|
674 (quit-process xscheme-process-name)
|
|
|
675 (process-send-string xscheme-process-name (char-to-string char))
|
|
|
676 (if (and mark-p xscheme-control-g-synchronization-p)
|
|
|
677 (process-send-string xscheme-process-name (char-to-string 0))))
|
|
|
678
|
|
|
679 ;;;; Internal Variables
|
|
|
680
|
|
|
681 (defvar xscheme-process-command-line nil
|
|
|
682 "Command used to start the most recent Scheme process.")
|
|
|
683
|
|
|
684 (defvar xscheme-expressions-ring-max 30
|
|
|
685 "*Maximum length of Scheme expressions ring.")
|
|
|
686
|
|
|
687 (defvar xscheme-expressions-ring nil
|
|
|
688 "List of expressions recently transmitted to the Scheme process.")
|
|
|
689
|
|
|
690 (defvar xscheme-expressions-ring-yank-pointer nil
|
|
|
691 "The tail of the Scheme expressions ring whose car is the last thing yanked.")
|
|
|
692
|
|
|
693 (defvar xscheme-process-filter-state 'idle
|
|
|
694 "State of scheme process escape reader state machine:
|
|
|
695 idle waiting for an escape sequence
|
|
|
696 reading-type received an altmode but nothing else
|
|
|
697 reading-string reading prompt string")
|
|
|
698
|
|
|
699 (defvar xscheme-running-p nil
|
|
|
700 "This variable, if nil, indicates that the scheme process is
|
|
|
701 waiting for input. Otherwise, it is busy evaluating something.")
|
|
|
702
|
|
|
703 (defconst xscheme-control-g-synchronization-p t
|
|
|
704 "If non-nil, insert markers in the scheme input stream to indicate when
|
|
|
705 control-g interrupts were signalled. Do not allow more control-g's to be
|
|
|
706 signalled until the scheme process acknowledges receipt.")
|
|
|
707
|
|
|
708 (defvar xscheme-control-g-disabled-p nil
|
|
|
709 "This variable, if non-nil, indicates that a control-g is being processed
|
|
|
710 by the scheme process, so additional control-g's are to be ignored.")
|
|
|
711
|
|
|
712 (defvar xscheme-allow-output-p t
|
|
|
713 "This variable, if nil, prevents output from the scheme process
|
|
|
714 from being inserted into the process-buffer.")
|
|
|
715
|
|
|
716 (defvar xscheme-prompt ""
|
|
|
717 "The current scheme prompt string.")
|
|
|
718
|
|
|
719 (defvar xscheme-string-accumulator ""
|
|
|
720 "Accumulator for the string being received from the scheme process.")
|
|
|
721
|
|
|
722 (defvar xscheme-string-receiver nil
|
|
|
723 "Procedure to send the string argument from the scheme process.")
|
|
|
724
|
|
|
725 (defvar xscheme-start-hook nil
|
|
|
726 "If non-nil, a procedure to call when the Scheme process is started.
|
|
|
727 When called, the current buffer will be the Scheme process-buffer.")
|
|
|
728
|
|
|
729 (defvar xscheme-runlight "")
|
|
|
730 (defvar xscheme-runlight-string nil)
|
|
|
731 (defvar xscheme-mode-string nil)
|
|
|
732 (setq-default scheme-mode-line-process
|
|
|
733 '("" xscheme-runlight))
|
|
|
734
|
|
|
735 (mapcar 'make-variable-buffer-local
|
|
|
736 '(xscheme-expressions-ring
|
|
|
737 xscheme-expressions-ring-yank-pointer
|
|
|
738 xscheme-process-filter-state
|
|
|
739 xscheme-running-p
|
|
|
740 xscheme-control-g-disabled-p
|
|
|
741 xscheme-allow-output-p
|
|
|
742 xscheme-prompt
|
|
|
743 xscheme-string-accumulator
|
|
|
744 xscheme-mode-string
|
|
|
745 scheme-mode-line-process))
|
|
|
746
|
|
|
747 ;;;; Basic Process Control
|
|
|
748
|
|
|
749 (defun xscheme-start-process (command-line the-process the-buffer)
|
|
|
750 (let ((buffer (get-buffer-create the-buffer)))
|
|
|
751 (let ((process (get-buffer-process buffer)))
|
|
|
752 (save-excursion
|
|
|
753 (set-buffer buffer)
|
|
|
754 (if (and process (memq (process-status process) '(run stop)))
|
|
|
755 (set-marker (process-mark process) (point-max))
|
|
|
756 (progn (if process (delete-process process))
|
|
|
757 (goto-char (point-max))
|
|
|
758 (scheme-interaction-mode nil)
|
|
|
759 (setq xscheme-process-name the-process)
|
|
|
760 (if (bobp)
|
|
|
761 (insert-before-markers
|
|
|
762 (substitute-command-keys xscheme-startup-message)))
|
|
|
763 (setq process
|
|
|
764 (let ((process-connection-type nil))
|
|
|
765 (apply 'start-process
|
|
|
766 (cons the-process
|
|
|
767 (cons buffer
|
|
|
768 (xscheme-parse-command-line
|
|
|
769 command-line))))))
|
|
|
770 (if (not (equal (process-name process) the-process))
|
|
|
771 (setq xscheme-process-name (process-name process)))
|
|
|
772 (if (not (equal (buffer-name buffer) the-buffer))
|
|
|
773 (setq xscheme-buffer-name (buffer-name buffer)))
|
|
|
774 (message "Starting process %s in buffer %s"
|
|
|
775 xscheme-process-name
|
|
|
776 xscheme-buffer-name)
|
|
|
777 (set-marker (process-mark process) (point-max))
|
|
|
778 (xscheme-process-filter-initialize t)
|
|
|
779 (xscheme-modeline-initialize xscheme-buffer-name)
|
|
|
780 (set-process-sentinel process 'xscheme-process-sentinel)
|
|
|
781 (set-process-filter process 'xscheme-process-filter)
|
|
|
782 (run-hooks 'xscheme-start-hook)))))
|
|
|
783 buffer))
|
|
|
784
|
|
|
785 (defun xscheme-parse-command-line (string)
|
|
|
786 (setq string (substitute-in-file-name string))
|
|
|
787 (let ((start 0)
|
|
|
788 (result '()))
|
|
|
789 (while start
|
|
|
790 (let ((index (string-match "[ \t]" string start)))
|
|
|
791 (setq start
|
|
|
792 (cond ((not index)
|
|
|
793 (setq result
|
|
|
794 (cons (substring string start)
|
|
|
795 result))
|
|
|
796 nil)
|
|
|
797 ((= index start)
|
|
|
798 (string-match "[^ \t]" string start))
|
|
|
799 (t
|
|
|
800 (setq result
|
|
|
801 (cons (substring string start index)
|
|
|
802 result))
|
|
|
803 (1+ index))))))
|
|
|
804 (nreverse result)))
|
|
|
805
|
|
|
806 (defun xscheme-wait-for-process ()
|
|
|
807 (sleep-for 2)
|
|
|
808 (while xscheme-running-p
|
|
|
809 (sleep-for 1)))
|
|
|
810
|
|
|
811 (defun xscheme-process-running-p ()
|
|
|
812 "True iff there is a Scheme process whose status is `run'."
|
|
|
813 (let ((process (get-process xscheme-process-name)))
|
|
|
814 (and process
|
|
|
815 (eq (process-status process) 'run))))
|
|
|
816
|
|
|
817 (defun xscheme-process-buffer ()
|
|
|
818 (let ((process (get-process xscheme-process-name)))
|
|
|
819 (and process (process-buffer process))))
|
|
|
820
|
|
|
821 (defun xscheme-process-buffer-window ()
|
|
|
822 (let ((buffer (xscheme-process-buffer)))
|
|
|
823 (and buffer (get-buffer-window buffer))))
|
|
|
824
|
|
|
825 (defun xscheme-process-buffer-current-p ()
|
|
|
826 "True iff the current buffer is the Scheme process buffer."
|
|
|
827 (eq (xscheme-process-buffer) (current-buffer)))
|
|
|
828
|
|
|
829 ;;;; Process Filter
|
|
|
830
|
|
|
831 (defun xscheme-process-sentinel (proc reason)
|
|
|
832 (let* ((buffer (process-buffer proc))
|
|
|
833 (name (buffer-name buffer)))
|
|
|
834 (save-excursion
|
|
|
835 (set-buffer buffer)
|
|
|
836 (xscheme-process-filter-initialize (eq reason 'run))
|
|
|
837 (if (not (eq reason 'run))
|
|
|
838 (progn
|
|
|
839 (setq scheme-mode-line-process "")
|
|
|
840 (setq xscheme-mode-string "no process")
|
|
|
841 (if (equal name (default-value 'xscheme-buffer-name))
|
|
|
842 (setq-default xscheme-runlight ""))))
|
|
|
843 (if (and (not (memq reason '(run stop)))
|
|
|
844 xscheme-signal-death-message)
|
|
|
845 (progn (beep)
|
|
|
846 (message
|
|
|
847 "The Scheme process has died! Do M-x reset-scheme to restart it"))))))
|
|
|
848
|
|
|
849 (defun xscheme-process-filter-initialize (running-p)
|
|
|
850 (setq xscheme-process-filter-state 'idle)
|
|
|
851 (setq xscheme-running-p running-p)
|
|
|
852 (setq xscheme-control-g-disabled-p nil)
|
|
|
853 (setq xscheme-allow-output-p t)
|
|
|
854 (setq xscheme-prompt "")
|
|
|
855 (if running-p
|
|
|
856 (let ((name (buffer-name (current-buffer))))
|
|
|
857 (setq scheme-mode-line-process '(": " xscheme-runlight-string))
|
|
|
858 (xscheme-modeline-initialize name)
|
|
|
859 (if (equal name (default-value 'xscheme-buffer-name))
|
|
|
860 (setq-default xscheme-runlight default-xscheme-runlight))))
|
|
|
861 (if (or (eq xscheme-runlight default-xscheme-runlight)
|
|
|
862 (equal xscheme-runlight ""))
|
|
|
863 (setq xscheme-runlight (list ": " 'xscheme-buffer-name ": " "?")))
|
|
|
864 (rplaca (nthcdr 3 xscheme-runlight)
|
|
|
865 (if running-p "?" "no process")))
|
|
|
866
|
|
|
867 (defun xscheme-process-filter (proc string)
|
|
|
868 (save-excursion
|
|
|
869 (set-buffer (process-buffer proc))
|
|
|
870 (let ((xscheme-filter-input string))
|
|
|
871 (while xscheme-filter-input
|
|
|
872 (cond ((eq xscheme-process-filter-state 'idle)
|
|
|
873 (let ((start (string-match "\e" xscheme-filter-input)))
|
|
|
874 (if start
|
|
|
875 (progn
|
|
|
876 (xscheme-process-filter-output
|
|
|
877 (substring xscheme-filter-input 0 start))
|
|
|
878 (setq xscheme-filter-input
|
|
|
879 (substring xscheme-filter-input (1+ start)))
|
|
|
880 (setq xscheme-process-filter-state 'reading-type))
|
|
|
881 (let ((string xscheme-filter-input))
|
|
|
882 (setq xscheme-filter-input nil)
|
|
|
883 (xscheme-process-filter-output string)))))
|
|
|
884 ((eq xscheme-process-filter-state 'reading-type)
|
|
|
885 (if (zerop (length xscheme-filter-input))
|
|
|
886 (setq xscheme-filter-input nil)
|
|
|
887 (let ((char (aref xscheme-filter-input 0)))
|
|
|
888 (setq xscheme-filter-input
|
|
|
889 (substring xscheme-filter-input 1))
|
|
|
890 (let ((entry (assoc char xscheme-process-filter-alist)))
|
|
|
891 (if entry
|
|
|
892 (funcall (nth 2 entry) (nth 1 entry))
|
|
|
893 (progn
|
|
|
894 (xscheme-process-filter-output ?\e char)
|
|
|
895 (setq xscheme-process-filter-state 'idle)))))))
|
|
|
896 ((eq xscheme-process-filter-state 'reading-string)
|
|
|
897 (let ((start (string-match "\e" xscheme-filter-input)))
|
|
|
898 (if start
|
|
|
899 (let ((string
|
|
|
900 (concat xscheme-string-accumulator
|
|
|
901 (substring xscheme-filter-input 0 start))))
|
|
|
902 (setq xscheme-filter-input
|
|
|
903 (substring xscheme-filter-input (1+ start)))
|
|
|
904 (setq xscheme-process-filter-state 'idle)
|
|
|
905 (funcall xscheme-string-receiver string))
|
|
|
906 (progn
|
|
|
907 (setq xscheme-string-accumulator
|
|
|
908 (concat xscheme-string-accumulator
|
|
|
909 xscheme-filter-input))
|
|
|
910 (setq xscheme-filter-input nil)))))
|
|
|
911 (t
|
|
|
912 (error "Scheme process filter -- bad state")))))))
|
|
|
913
|
|
|
914 ;;;; Process Filter Output
|
|
|
915
|
|
|
916 (defun xscheme-process-filter-output (&rest args)
|
|
|
917 (if xscheme-allow-output-p
|
|
|
918 (let ((string (apply 'concat args)))
|
|
|
919 (save-excursion
|
|
|
920 (xscheme-goto-output-point)
|
|
|
921 (while (string-match "\\(\007\\|\f\\)" string)
|
|
|
922 (let ((start (match-beginning 0))
|
|
|
923 (end (match-end 0)))
|
|
|
924 (insert-before-markers (substring string 0 start))
|
|
|
925 (if (= ?\f (aref string start))
|
|
|
926 (progn
|
|
|
927 (if (not (bolp))
|
|
|
928 (insert-before-markers ?\n))
|
|
|
929 (insert-before-markers ?\f))
|
|
|
930 (beep))
|
|
|
931 (setq string (substring string (1+ start)))))
|
|
|
932 (insert-before-markers string)))))
|
|
|
933
|
|
|
934 (defun xscheme-guarantee-newlines (n)
|
|
|
935 (if xscheme-allow-output-p
|
|
|
936 (save-excursion
|
|
|
937 (xscheme-goto-output-point)
|
|
|
938 (let ((stop nil))
|
|
|
939 (while (and (not stop)
|
|
|
940 (bolp))
|
|
|
941 (setq n (1- n))
|
|
|
942 (if (bobp)
|
|
|
943 (setq stop t)
|
|
|
944 (backward-char))))
|
|
|
945 (xscheme-goto-output-point)
|
|
|
946 (while (> n 0)
|
|
|
947 (insert-before-markers ?\n)
|
|
|
948 (setq n (1- n))))))
|
|
|
949
|
|
|
950 (defun xscheme-goto-output-point ()
|
|
|
951 (let ((process (get-process xscheme-process-name)))
|
|
|
952 (set-buffer (process-buffer process))
|
|
|
953 (goto-char (process-mark process))))
|
|
|
954
|
|
|
955 (defun xscheme-modeline-initialize (name)
|
|
|
956 (setq xscheme-runlight-string "")
|
|
|
957 (if (equal name (default-value 'xscheme-buffer-name))
|
|
|
958 (setq-default xscheme-runlight-string ""))
|
|
|
959 (setq xscheme-mode-string "")
|
|
|
960 (setq mode-line-buffer-identification
|
|
|
961 (list (concat name ": ")
|
|
|
962 'xscheme-mode-string)))
|
|
|
963
|
|
|
964 (defun xscheme-set-runlight (runlight)
|
|
|
965 (setq xscheme-runlight-string runlight)
|
|
|
966 (if (equal (buffer-name (current-buffer))
|
|
|
967 (default-value 'xscheme-buffer-name))
|
|
|
968 (setq-default xscheme-runlight-string runlight))
|
|
|
969 (rplaca (nthcdr 3 xscheme-runlight) runlight)
|
|
|
970 (xscheme-modeline-redisplay))
|
|
|
971
|
|
|
972 (defun xscheme-modeline-redisplay ()
|
|
|
973 (save-excursion (set-buffer (other-buffer)))
|
|
|
974 (set-buffer-modified-p (buffer-modified-p))
|
|
|
975 (sit-for 0))
|
|
|
976
|
|
|
977 ;;;; Process Filter Operations
|
|
|
978
|
|
|
979 (defvar xscheme-process-filter-alist
|
|
|
980 '((?D xscheme-enter-debugger-mode
|
|
|
981 xscheme-process-filter:string-action)
|
|
|
982 (?E xscheme-eval
|
|
|
983 xscheme-process-filter:string-action)
|
|
|
984 (?P xscheme-set-prompt-variable
|
|
|
985 xscheme-process-filter:string-action)
|
|
|
986 (?R xscheme-enter-interaction-mode
|
|
|
987 xscheme-process-filter:simple-action)
|
|
|
988 (?b xscheme-start-gc
|
|
|
989 xscheme-process-filter:simple-action)
|
|
|
990 (?e xscheme-finish-gc
|
|
|
991 xscheme-process-filter:simple-action)
|
|
|
992 (?f xscheme-exit-input-wait
|
|
|
993 xscheme-process-filter:simple-action)
|
|
|
994 (?g xscheme-enable-control-g
|
|
|
995 xscheme-process-filter:simple-action)
|
|
|
996 (?i xscheme-prompt-for-expression
|
|
|
997 xscheme-process-filter:string-action)
|
|
|
998 (?m xscheme-message
|
|
|
999 xscheme-process-filter:string-action)
|
|
|
1000 (?n xscheme-prompt-for-confirmation
|
|
|
1001 xscheme-process-filter:string-action)
|
|
|
1002 (?o xscheme-output-goto
|
|
|
1003 xscheme-process-filter:simple-action)
|
|
|
1004 (?p xscheme-set-prompt
|
|
|
1005 xscheme-process-filter:string-action)
|
|
|
1006 (?s xscheme-enter-input-wait
|
|
|
1007 xscheme-process-filter:simple-action)
|
|
|
1008 (?v xscheme-write-value
|
|
|
1009 xscheme-process-filter:string-action)
|
|
|
1010 (?w xscheme-cd
|
|
|
1011 xscheme-process-filter:string-action)
|
|
|
1012 (?z xscheme-display-process-buffer
|
|
|
1013 xscheme-process-filter:simple-action)
|
|
|
1014 (?c xscheme-unsolicited-read-char
|
|
|
1015 xscheme-process-filter:simple-action))
|
|
|
1016 "Table used to decide how to handle process filter commands.
|
|
|
1017 Value is a list of entries, each entry is a list of three items.
|
|
|
1018
|
|
|
1019 The first item is the character that the process filter dispatches on.
|
|
|
1020 The second item is the action to be taken, a function.
|
|
|
1021 The third item is the handler for the entry, a function.
|
|
|
1022
|
|
|
1023 When the process filter sees a command whose character matches a
|
|
|
1024 particular entry, it calls the handler with two arguments: the action
|
|
|
1025 and the string containing the rest of the process filter's input
|
|
|
1026 stream. It is the responsibility of the handler to invoke the action
|
|
|
1027 with the appropriate arguments, and to reenter the process filter with
|
|
|
1028 the remaining input.")
|
|
|
1029
|
|
|
1030 (defun xscheme-process-filter:simple-action (action)
|
|
|
1031 (setq xscheme-process-filter-state 'idle)
|
|
|
1032 (funcall action))
|
|
|
1033
|
|
|
1034 (defun xscheme-process-filter:string-action (action)
|
|
|
1035 (setq xscheme-string-receiver action)
|
|
|
1036 (setq xscheme-string-accumulator "")
|
|
|
1037 (setq xscheme-process-filter-state 'reading-string))
|
|
|
1038
|
|
|
1039 (defconst xscheme-runlight:running "run"
|
|
|
1040 "The character displayed when the Scheme process is running.")
|
|
|
1041
|
|
|
1042 (defconst xscheme-runlight:input "input"
|
|
|
1043 "The character displayed when the Scheme process is waiting for input.")
|
|
|
1044
|
|
|
1045 (defconst xscheme-runlight:gc "gc"
|
|
|
1046 "The character displayed when the Scheme process is garbage collecting.")
|
|
|
1047
|
|
|
1048 (defun xscheme-start-gc ()
|
|
|
1049 (xscheme-set-runlight xscheme-runlight:gc))
|
|
|
1050
|
|
|
1051 (defun xscheme-finish-gc ()
|
|
|
1052 (xscheme-set-runlight
|
|
|
1053 (if xscheme-running-p xscheme-runlight:running xscheme-runlight:input)))
|
|
|
1054
|
|
|
1055 (defun xscheme-enter-input-wait ()
|
|
|
1056 (xscheme-set-runlight xscheme-runlight:input)
|
|
|
1057 (setq xscheme-control-g-disabled-p nil)
|
|
|
1058 (setq xscheme-running-p nil))
|
|
|
1059
|
|
|
1060 (defun xscheme-exit-input-wait ()
|
|
|
1061 (xscheme-set-runlight xscheme-runlight:running)
|
|
|
1062 (setq xscheme-running-p t))
|
|
|
1063
|
|
|
1064 (defun xscheme-enable-control-g ()
|
|
|
1065 (setq xscheme-control-g-disabled-p nil))
|
|
|
1066
|
|
|
1067 (defun xscheme-display-process-buffer ()
|
|
|
1068 (let ((window (or (xscheme-process-buffer-window)
|
|
|
1069 (display-buffer (xscheme-process-buffer)))))
|
|
|
1070 (save-window-excursion
|
|
|
1071 (select-window window)
|
|
|
1072 (xscheme-goto-output-point)
|
|
|
1073 (if (xscheme-debugger-mode-p)
|
|
|
1074 (xscheme-enter-interaction-mode)))))
|
|
|
1075
|
|
|
1076 (defun xscheme-unsolicited-read-char ()
|
|
|
1077 nil)
|
|
|
1078
|
|
|
1079 (defun xscheme-eval (string)
|
|
|
1080 (eval (car (read-from-string string))))
|
|
|
1081
|
|
|
1082 (defun xscheme-message (string)
|
|
|
1083 (if (not (zerop (length string)))
|
|
|
1084 (xscheme-write-message-1 string (format ";%s" string))))
|
|
|
1085
|
|
|
1086 (defun xscheme-write-value (string)
|
|
|
1087 (if (zerop (length string))
|
|
|
1088 (xscheme-write-message-1 "(no value)" ";No value")
|
|
|
1089 (xscheme-write-message-1 string (format ";Value: %s" string))))
|
|
|
1090
|
|
|
1091 (defun xscheme-write-message-1 (message-string output-string)
|
|
|
1092 (let* ((process (get-process xscheme-process-name))
|
|
|
1093 (window (get-buffer-window (process-buffer process))))
|
|
|
1094 (if (or (not window)
|
|
|
1095 (not (pos-visible-in-window-p (process-mark process)
|
|
|
1096 window)))
|
|
|
1097 (message "%s" message-string)))
|
|
|
1098 (xscheme-guarantee-newlines 1)
|
|
|
1099 (xscheme-process-filter-output output-string))
|
|
|
1100
|
|
|
1101 (defun xscheme-set-prompt-variable (string)
|
|
|
1102 (setq xscheme-prompt string))
|
|
|
1103
|
|
|
1104 (defun xscheme-set-prompt (string)
|
|
|
1105 (setq xscheme-prompt string)
|
|
|
1106 (xscheme-guarantee-newlines 2)
|
|
|
1107 (setq xscheme-mode-string (xscheme-coerce-prompt string))
|
|
|
1108 (xscheme-modeline-redisplay))
|
|
|
1109
|
|
|
1110 (defun xscheme-output-goto ()
|
|
|
1111 (xscheme-goto-output-point)
|
|
|
1112 (xscheme-guarantee-newlines 2))
|
|
|
1113
|
|
|
1114 (defun xscheme-coerce-prompt (string)
|
|
|
1115 (if (string-match "^[0-9]+ \\[[^]]+\\] " string)
|
|
|
1116 (let ((end (match-end 0)))
|
|
|
1117 (let ((prompt (substring string end)))
|
|
|
1118 (xscheme-process-filter-output prompt)
|
|
|
1119 (if (and (> (length prompt) 0)
|
|
|
1120 (not (= (aref prompt (- (length prompt) 1)) ? )))
|
|
|
1121 (xscheme-process-filter-output " "))
|
|
|
1122 (substring string 0 (- end 1))))
|
|
|
1123 string))
|
|
|
1124
|
|
|
1125 (defun xscheme-cd (directory-string)
|
|
|
1126 (save-excursion
|
|
|
1127 (set-buffer (xscheme-process-buffer))
|
|
|
1128 (cd directory-string)))
|
|
|
1129
|
|
|
1130 (defun xscheme-prompt-for-confirmation (prompt-string)
|
|
|
1131 (xscheme-send-char (if (y-or-n-p prompt-string) ?y ?n)))
|
|
|
1132
|
|
|
1133 (defun xscheme-prompt-for-expression (prompt-string)
|
|
|
1134 (xscheme-send-string-2
|
|
|
1135 (read-from-minibuffer prompt-string nil xscheme-prompt-for-expression-map)))
|
|
|
1136
|
|
|
1137 (defvar xscheme-prompt-for-expression-map nil)
|
|
|
1138 (if (not xscheme-prompt-for-expression-map)
|
|
|
1139 (progn
|
|
|
1140 (setq xscheme-prompt-for-expression-map
|
|
|
1141 (copy-keymap minibuffer-local-map))
|
|
|
1142 (substitute-key-definition 'exit-minibuffer
|
|
|
1143 'xscheme-prompt-for-expression-exit
|
|
|
1144 xscheme-prompt-for-expression-map)))
|
|
|
1145
|
|
|
1146 (defun xscheme-prompt-for-expression-exit ()
|
|
|
1147 (interactive)
|
|
|
1148 (if (eq (xscheme-region-expression-p (point-min) (point-max)) 'one)
|
|
|
1149 (exit-minibuffer)
|
|
|
1150 (error "input must be a single, complete expression")))
|
|
|
1151
|
|
|
1152 (defun xscheme-region-expression-p (start end)
|
|
|
1153 (save-excursion
|
|
|
1154 (let ((old-syntax-table (syntax-table)))
|
|
|
1155 (unwind-protect
|
|
|
1156 (progn
|
|
|
1157 (set-syntax-table scheme-mode-syntax-table)
|
|
|
1158 (let ((state (parse-partial-sexp start end)))
|
|
|
1159 (and (zerop (car state)) ;depth = 0
|
|
|
1160 (nth 2 state) ;last-sexp exists, i.e. >= 1 sexps
|
|
|
1161 (let ((state (parse-partial-sexp start (nth 2 state))))
|
|
|
1162 (if (nth 2 state) 'many 'one)))))
|
|
|
1163 (set-syntax-table old-syntax-table)))))
|
