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0
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1 /* Editor command loop.
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2 Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
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3 Copyright (C) 1995, 1996 Ben Wing.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Mule 2.0. Not synched with FSF.
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23 This was renamed from keyboard.c. However, it only contains the
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24 command-loop stuff from FSF's keyboard.c; all the rest is in
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25 event*.c, console.c, or signal.c. */
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26
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27 /* #### This module purports to separate out the command-loop stuff
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28 from event-stream.c, but it doesn't really. Perhaps this file
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29 should just be merged into event-stream.c, given its shortness. */
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30
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31 #include <config.h>
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32 #include "lisp.h"
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33
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34 #include "buffer.h"
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35 #include "commands.h"
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36 #include "frame.h"
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37 #include "events.h"
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38 #include "window.h"
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39
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40 /* Current depth in recursive edits. */
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41 int command_loop_level;
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42
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412
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43 /* Total number of times command_loop has read a key sequence. */
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44 int num_input_keys;
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45
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0
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46 #ifndef LISP_COMMAND_LOOP
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47 /* Form to evaluate (if non-nil) when Emacs is started. */
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48 Lisp_Object Vtop_level;
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49 #else
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50 /* Function to call to evaluate to read and process events. */
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51 Lisp_Object Vcommand_loop;
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52 #endif /* LISP_COMMAND_LOOP */
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53
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54 Lisp_Object Venter_window_hook, Vleave_window_hook;
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55
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56 /* The error handler. */
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57 Lisp_Object Qcommand_error;
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58
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59 /* The emergency error handler, before we're ready. */
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60 Lisp_Object Qreally_early_error_handler;
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61
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219
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62 /* Variable defined in Lisp. */
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63 Lisp_Object Qerrors_deactivate_region;
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64
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272
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65 Lisp_Object Qtop_level;
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66
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0
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67 static Lisp_Object command_loop_1 (Lisp_Object dummy);
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272
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68 EXFUN (Fcommand_loop_1, 0);
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0
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69
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70 /* There are two possible command loops -- one written entirely in
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71 C and one written mostly in Lisp, except stuff written in C for
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72 speed. The advantage of the Lisp command loop is that the user
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73 can specify their own command loop to use by changing the variable
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74 `command-loop'. Its disadvantage is that it's slow. */
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75
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76 static Lisp_Object
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77 default_error_handler (Lisp_Object data)
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78 {
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79 int speccount = specpdl_depth ();
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80
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219
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81 /* None of this is invoked, normally. This code is almost identical
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82 to the `command-error' function, except `command-error' does cool
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83 tricks with sounds. This function is a fallback, invoked if
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84 command-error is unavailable. */
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85
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0
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86 Fding (Qnil, Qnil, Qnil);
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219
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87
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88 if (!NILP (Fboundp (Qerrors_deactivate_region))
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89 && !NILP (Fsymbol_value (Qerrors_deactivate_region)))
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90 zmacs_deactivate_region ();
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0
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91 Fdiscard_input ();
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92 specbind (Qinhibit_quit, Qt);
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93 Vstandard_output = Qt;
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94 Vstandard_input = Qt;
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95 Vexecuting_macro = Qnil;
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219
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96 Fset (intern ("last-error"), data);
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0
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97 clear_echo_area (selected_frame (), Qnil, 0);
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219
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98 Fdisplay_error (data, Qt);
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0
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99 check_quit (); /* make Vquit_flag accurate */
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100 Vquit_flag = Qnil;
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101 return (unbind_to (speccount, Qt));
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102 }
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103
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20
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104 DEFUN ("really-early-error-handler", Freally_early_error_handler, 1, 1, 0, /*
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0
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105 You should almost certainly not be using this.
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20
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106 */
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107 (x))
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0
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108 {
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109 /* This is an error handler used when we're running temacs and when
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110 we're in the early stages of XEmacs. No errors ought to be
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111 occurring in those cases (or they ought to be trapped and
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112 dealt with elsewhere), but if an error slips through, we need
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113 to deal with it. We could write this function in Lisp (and it
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114 used to be this way, at the beginning of loadup.el), but we do
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115 it this way in case an error occurs before we get to loading
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116 loadup.el. Note that there is also an `early-error-handler',
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117 used in startup.el to catch more reasonable errors that
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118 might occur during startup if the sysadmin or whoever fucked
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119 up. This function is more conservative in what it does
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120 and is used only as a last resort, indicating that the
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121 programmer himself fucked up somewhere. */
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122 stderr_out ("*** Error in XEmacs initialization");
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123 Fprint (x, Qexternal_debugging_output);
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124 stderr_out ("*** Backtrace\n");
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125 Fbacktrace (Qexternal_debugging_output, Qt);
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126 stderr_out ("*** Killing XEmacs\n");
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127 return Fkill_emacs (make_int (-1));
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128 }
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129
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130
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131 /**********************************************************************/
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132 /* Command-loop (in C) */
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133 /**********************************************************************/
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134
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135 #ifndef LISP_COMMAND_LOOP
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136
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137 /* The guts of the command loop are in command_loop_1(). This function
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138 doesn't catch errors, though -- that's the job of command_loop_2(),
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139 which is a condition-case wrapper around command_loop_1().
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140 command_loop_1() never returns, but may get thrown out of.
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141
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142 When an error occurs, cmd_error() is called, which usually
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143 invokes the Lisp error handler in `command-error'; however,
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144 a default error handler is provided if `command-error' is nil
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145 (e.g. during startup). The purpose of the error handler is
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146 simply to display the error message and do associated cleanup;
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147 it does not need to throw anywhere. When the error handler
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148 finishes, the condition-case in command_loop_2() will finish and
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149 command_loop_2() will reinvoke command_loop_1().
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150
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151 command_loop_2() is invoked from three places: from
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152 initial_command_loop() (called from main() at the end of
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153 internal initialization), from the Lisp function `recursive-edit',
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154 and from call_command_loop().
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155
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156 call_command_loop() is called when a macro is started and when the
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157 minibuffer is entered; normal termination of the macro or
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158 minibuffer causes a throw out of the recursive command loop. (To
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159 'execute-kbd-macro for macros and 'exit for minibuffers. Note also
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160 that the low-level minibuffer-entering function,
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161 `read-minibuffer-internal', provides its own error handling and
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162 does not need command_loop_2()'s error encapsulation; so it tells
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163 call_command_loop() to invoke command_loop_1() directly.)
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164
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165 Note that both read-minibuffer-internal and recursive-edit set
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166 up a catch for 'exit; this is why `abort-recursive-edit', which
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167 throws to this catch, exits out of either one.
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168
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169 initial_command_loop(), called from main(), sets up a catch
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170 for 'top-level when invoking command_loop_2(), allowing functions
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171 to throw all the way to the top level if they really need to.
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172 Before invoking command_loop_2(), initial_command_loop() calls
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173 top_level_1(), which handles all of the startup stuff (creating
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174 the initial frame, handling the command-line options, loading
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175 the user's .emacs file, etc.). The function that actually does this
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176 is in Lisp and is pointed to by the variable `top-level';
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177 normally this function is `normal-top-level'. top_level_1() is
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178 just an error-handling wrapper similar to command_loop_2().
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179 Note also that initial_command_loop() sets up a catch for 'top-level
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180 when invoking top_level_1(), just like when it invokes
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181 command_loop_2(). */
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182
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183
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184 static Lisp_Object
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185 cmd_error (Lisp_Object data, Lisp_Object dummy)
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186 {
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187 /* This function can GC */
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188 check_quit (); /* make Vquit_flag accurate */
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189 Vquit_flag = Qnil;
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190
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191 any_console_state ();
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192
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193 if (!NILP (Ffboundp (Qcommand_error)))
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194 return call1 (Qcommand_error, data);
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195
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196 return default_error_handler (data);
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197 }
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198
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199 static Lisp_Object
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200 top_level_1 (Lisp_Object dummy)
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201 {
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202 /* This function can GC */
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203 /* On entry to the outer level, run the startup file */
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204 if (!NILP (Vtop_level))
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205 condition_case_1 (Qerror, Feval, Vtop_level, cmd_error, Qnil);
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206 #if 1
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207 else
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208 {
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209 message ("\ntemacs can only be run in -batch mode.");
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210 noninteractive = 1; /* prevent things under kill-emacs from blowing up */
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211 Fkill_emacs (make_int (-1));
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212 }
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213 #else
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214 else if (purify_flag)
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215 message ("Bare impure Emacs (standard Lisp code not loaded)");
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216 else
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217 message ("Bare Emacs (standard Lisp code not loaded)");
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218 #endif
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219
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220 return Qnil;
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221 }
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222
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223 /* Here we catch errors in execution of commands within the
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224 editing loop, and reenter the editing loop.
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225 When there is an error, cmd_error runs and the call
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226 to condition_case_1() returns. */
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227
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228 /* Avoid confusing the compiler. A helper function for command_loop_2 */
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229 static DOESNT_RETURN
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230 command_loop_3 (void)
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231 {
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138
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232 #ifdef LWLIB_MENUBARS_LUCID
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233 extern int in_menu_callback; /* defined in menubar-x.c */
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234 #endif /* LWLIB_MENUBARS_LUCID */
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235
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236 #ifdef LWLIB_MENUBARS_LUCID
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237 /*
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238 * #### Fix the menu code so this isn't necessary.
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239 *
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240 * We cannot allow the lwmenu code to be reentered, because the
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241 * code is not written to be reentrant and will crash. Therefore
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242 * paths from the menu callbacks back into the menu code have to
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243 * be blocked. Fnext_event is the normal path into the menu code,
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244 * but waiting to signal an error there is too late in case where
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245 * a new command loop has been started. The error will be caught
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246 * and Fnext_event will be called again, looping forever. So we
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247 * signal an error here to avoid the loop.
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248 */
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249 if (in_menu_callback)
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250 error ("Attempt to enter command_loop_3 inside menu callback");
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251 #endif /* LWLIB_MENUBARS_LUCID */
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0
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252 /* This function can GC */
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253 for (;;)
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254 {
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255 condition_case_1 (Qerror, command_loop_1, Qnil, cmd_error, Qnil);
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256 /* #### wrong with selected-console? */
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257 /* See command in initial_command_loop about why this value
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258 is 0. */
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259 reset_this_command_keys (Vselected_console, 0);
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260 }
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261 }
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262
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263 static Lisp_Object
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264 command_loop_2 (Lisp_Object dummy)
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265 {
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266 command_loop_3(); /* doesn't return */
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267 return Qnil;
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268 }
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269
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270 /* This is called from emacs.c when it's done with initialization. */
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271
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272 DOESNT_RETURN
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273 initial_command_loop (Lisp_Object load_me)
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274 {
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275 /* This function can GC */
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276 if (!NILP (load_me))
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277 Vtop_level = list2 (Qload, load_me);
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278
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279 /* First deal with startup and command-line arguments. A throw
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280 to 'top-level gets us back here directly (does this ever happen?).
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281 Otherwise, this function will return normally when all command-
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282 line arguments have been processed, the user's initialization
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283 file has been read in, and the first frame has been created. */
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284 internal_catch (Qtop_level, top_level_1, Qnil, 0);
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285
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286 /* If an error occurred during startup and the initial console
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287 wasn't created, then die now (the error was already printed out
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288 on the terminal device). */
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289 if (!noninteractive &&
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290 (!CONSOLEP (Vselected_console) ||
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291 CONSOLE_STREAM_P (XCONSOLE (Vselected_console))))
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292 Fkill_emacs (make_int (-1));
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185
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293
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0
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294 /* End of -batch run causes exit here. */
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295 if (noninteractive)
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296 Fkill_emacs (Qt);
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297
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298 for (;;)
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299 {
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300 command_loop_level = 0;
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301 MARK_MODELINE_CHANGED;
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302 /* Now invoke the command loop. It never returns; however, a
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303 throw to 'top-level will place us at the end of this loop. */
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304 internal_catch (Qtop_level, command_loop_2, Qnil, 0);
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305 /* #### wrong with selected-console? */
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306 /* We don't actually call clear_echo_area() here, partially
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307 at least because that runs Lisp code and it may be unsafe
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308 to do so -- we are outside of the normal catches for
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309 errors and such. */
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310 reset_this_command_keys (Vselected_console, 0);
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311 }
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312 }
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313
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314 /* This function is invoked when a macro or minibuffer starts up.
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315 Normal termination of the macro or minibuffer causes a throw past us.
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316 See the comment above.
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317
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318 Note that this function never returns (but may be thrown out of). */
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319
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320 Lisp_Object
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321 call_command_loop (Lisp_Object catch_errors)
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322 {
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323 /* This function can GC */
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324 if (NILP (catch_errors))
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325 return (command_loop_1 (Qnil));
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326 else
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327 return (command_loop_2 (Qnil));
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328 }
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329
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330 static Lisp_Object
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331 recursive_edit_unwind (Lisp_Object buffer)
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332 {
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333 if (!NILP (buffer))
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334 Fset_buffer (buffer);
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335
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336 command_loop_level--;
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337 MARK_MODELINE_CHANGED;
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338
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339 return Qnil;
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340 }
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341
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20
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342 DEFUN ("recursive-edit", Frecursive_edit, 0, 0, "", /*
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0
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343 Invoke the editor command loop recursively.
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344 To get out of the recursive edit, a command can do `(throw 'exit nil)';
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345 that tells this function to return.
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346 Alternately, `(throw 'exit t)' makes this function signal an error.
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20
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347 */
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348 ())
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0
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349 {
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350 /* This function can GC */
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351 Lisp_Object val;
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352 int speccount = specpdl_depth ();
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353
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354 command_loop_level++;
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355 MARK_MODELINE_CHANGED;
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356
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357 record_unwind_protect (recursive_edit_unwind,
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358 ((current_buffer
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359 != XBUFFER (XWINDOW (Fselected_window
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360 (Qnil))->buffer))
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361 ? Fcurrent_buffer ()
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362 : Qnil));
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363
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364 specbind (Qstandard_output, Qt);
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365 specbind (Qstandard_input, Qt);
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366
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367 val = internal_catch (Qexit, command_loop_2, Qnil, 0);
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368
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369 if (EQ (val, Qt))
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370 /* Turn abort-recursive-edit into a quit. */
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371 Fsignal (Qquit, Qnil);
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372
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373 return unbind_to (speccount, Qnil);
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374 }
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375
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376 #endif /* !LISP_COMMAND_LOOP */
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377
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378
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379 /**********************************************************************/
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|
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380 /* Alternate command-loop (largely in Lisp) */
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381 /**********************************************************************/
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382
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383 #ifdef LISP_COMMAND_LOOP
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384
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385 static Lisp_Object
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386 load1 (Lisp_Object name)
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387 {
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388 /* This function can GC */
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389 call4 (Qload, name, Qnil, Qt, Qnil);
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390 return (Qnil);
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|
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391 }
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392
|
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393 /* emergency backups for cold-load-stream use */
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394 static Lisp_Object
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395 cold_load_command_error (Lisp_Object datum, Lisp_Object ignored)
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396 {
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397 /* This function can GC */
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398 check_quit (); /* make Vquit_flag accurate */
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399 Vquit_flag = Qnil;
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400
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401 return default_error_handler (datum);
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402 }
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403
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404 static Lisp_Object
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405 cold_load_command_loop (Lisp_Object dummy)
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406 {
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407 /* This function can GC */
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408 return (condition_case_1 (Qt,
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409 command_loop_1, Qnil,
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410 cold_load_command_error, Qnil));
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411 }
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412
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413 Lisp_Object
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414 call_command_loop (Lisp_Object catch_errors)
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415 {
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416 /* This function can GC */
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417 reset_this_command_keys (Vselected_console, Qnil); /* #### bleagh */
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418
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419 loop:
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420 for (;;)
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421 {
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422 if (NILP (Vcommand_loop))
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423 break;
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424 call1 (Vcommand_loop, catch_errors);
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425 }
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426
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427 /* This isn't a "correct" definition, but you're pretty hosed if
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428 you broke "command-loop" anyway */
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429 /* #### not correct with Vselected_console */
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430 XCONSOLE (Vselected_console)->prefix_arg = Qnil;
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431 if (NILP (catch_errors))
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432 Fcommand_loop_1 ();
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185
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433 else
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0
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434 internal_catch (Qtop_level,
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435 cold_load_command_loop, Qnil, 0);
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436 goto loop;
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437 return Qnil;
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438 }
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439
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440 static Lisp_Object
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441 initial_error_handler (Lisp_Object datum, Lisp_Object ignored)
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442 {
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443 /* This function can GC */
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444 Vcommand_loop = Qnil;
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445 Fding (Qnil, Qnil, Qnil);
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446
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447 if (CONSP (datum) && EQ (XCAR (datum), Qquit))
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448 /* Don't bother with the message */
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449 return (Qt);
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185
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450
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0
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451 message ("Error in command-loop!!");
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452 Fset (intern ("last-error"), datum); /* #### Better/different name? */
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453 Fsit_for (make_int (2), Qnil);
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454 cold_load_command_error (datum, Qnil);
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455 return (Qt);
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456 }
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457
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458 DOESNT_RETURN
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459 initial_command_loop (Lisp_Object load_me)
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460 {
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461 /* This function can GC */
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462 if (!NILP (load_me))
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463 {
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464 if (!NILP (condition_case_1 (Qt, load1, load_me,
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465 initial_error_handler, Qnil)))
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466 Fkill_emacs (make_int (-1));
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467 }
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468
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469 for (;;)
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470 {
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471 command_loop_level = 0;
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472 MARK_MODELINE_CHANGED;
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473
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474 condition_case_1 (Qt,
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475 call_command_loop, Qtop_level,
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476 initial_error_handler, Qnil);
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477 }
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478 }
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479
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480 #endif /* LISP_COMMAND_LOOP */
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481
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482
|
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483 /**********************************************************************/
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484 /* Guts of command loop */
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485 /**********************************************************************/
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486
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487 static Lisp_Object
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488 command_loop_1 (Lisp_Object dummy)
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489 {
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490 /* This function can GC */
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491 /* #### not correct with Vselected_console */
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492 XCONSOLE (Vselected_console)->prefix_arg = Qnil;
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493 return (Fcommand_loop_1 ());
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|
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494 }
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495
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496 /* This is the actual command reading loop, sans error-handling
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497 encapsulation. This is used for both the C and Lisp command
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498 loops. Originally this function was written in Lisp when
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499 the Lisp command loop was used, but it was too slow that way.
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500
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501 Under the C command loop, this function will never return
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502 (although someone might throw past it). Under the Lisp
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503 command loop, this will return only when the user specifies
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504 a new command loop by changing the command-loop variable. */
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505
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20
|
506 DEFUN ("command-loop-1", Fcommand_loop_1, 0, 0, 0, /*
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0
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507 Invoke the internals of the canonical editor command loop.
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508 Don't call this unless you know what you're doing.
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|
20
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509 */
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510 ())
|
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0
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511 {
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|
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512 /* This function can GC */
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189
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513 Lisp_Object event = Fmake_event (Qnil, Qnil);
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0
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514 Lisp_Object old_loop = Qnil;
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515 struct gcpro gcpro1, gcpro2;
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|
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516 int was_locked = in_single_console_state ();
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|
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517 GCPRO2 (event, old_loop);
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518
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519 /* cancel_echoing (); */
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|
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520 /* This magically makes single character keyboard macros work just
|
|
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521 like the real thing. This is slightly bogus, but it's in here for
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522 compatibility with Emacs 18. It's not even clear what the "right
|
|
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523 thing" is. */
|
|
412
|
524 if (!(((STRINGP (Vexecuting_macro) || VECTORP (Vexecuting_macro))
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|
|
525 && XINT (Flength (Vexecuting_macro)) == 1)))
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|
0
|
526 Vlast_command = Qt;
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|
|
527
|
|
|
528 #ifndef LISP_COMMAND_LOOP
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|
|
529 while (1)
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530 #else
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531 old_loop = Vcommand_loop;
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532 while (EQ (Vcommand_loop, old_loop))
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|
|
533 #endif /* LISP_COMMAND_LOOP */
|
|
|
534 {
|
|
280
|
535 /* If focus_follows_mouse, make sure the frame with window manager
|
|
|
536 focus is selected. */
|
|
282
|
537 if (focus_follows_mouse)
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|
|
538 investigate_frame_change ();
|
|
412
|
539
|
|
0
|
540 /* Make sure the current window's buffer is selected. */
|
|
|
541 {
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|
|
542 Lisp_Object selected_window = Fselected_window (Qnil);
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|
|
543
|
|
|
544 if (!NILP (selected_window) &&
|
|
|
545 (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer))
|
|
|
546 {
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|
|
547 set_buffer_internal (XBUFFER (XWINDOW (selected_window)->buffer));
|
|
|
548 }
|
|
|
549 }
|
|
|
550
|
|
|
551 /* If ^G was typed before we got here (that is, before emacs was
|
|
|
552 idle and waiting for input) then we treat that as an interrupt. */
|
|
|
553 QUIT;
|
|
|
554
|
|
|
555 /* If minibuffer on and echo area in use, wait 2 sec and redraw
|
|
|
556 minibuffer. Treat a ^G here as a command, not an interrupt.
|
|
|
557 */
|
|
|
558 if (minibuf_level > 0 && echo_area_active (selected_frame ()))
|
|
|
559 {
|
|
|
560 /* Bind dont_check_for_quit to 1 so that C-g gets read in
|
|
|
561 rather than quitting back to the minibuffer. */
|
|
|
562 int count = specpdl_depth ();
|
|
|
563 begin_dont_check_for_quit ();
|
|
|
564 Fsit_for (make_int (2), Qnil);
|
|
|
565 clear_echo_area (selected_frame (), Qnil, 0);
|
|
|
566 unbind_to (count, Qnil);
|
|
|
567 }
|
|
|
568
|
|
|
569 Fnext_event (event, Qnil);
|
|
|
570 /* If ^G was typed while emacs was reading input from the user, then
|
|
|
571 Fnext_event() will have read it as a normal event and
|
|
|
572 next_event_internal() will have set Vquit_flag. We reset this
|
|
|
573 so that the ^G is treated as just another key. This is strange,
|
|
|
574 but it is what emacs 18 did.
|
|
|
575
|
|
|
576 Do not call check_quit() here. */
|
|
|
577 Vquit_flag = Qnil;
|
|
|
578 Fdispatch_event (event);
|
|
|
579
|
|
|
580 if (!was_locked)
|
|
|
581 any_console_state ();
|
|
288
|
582 #if (defined (_MSC_VER) \
|
|
|
583 || defined (__SUNPRO_C) \
|
|
|
584 || defined (__SUNPRO_CC) \
|
|
|
585 || (defined (DEC_ALPHA) \
|
|
|
586 && defined (OSF1)))
|
|
0
|
587 if (0) return Qnil; /* Shut up compiler */
|
|
|
588 #endif
|
|
|
589 }
|
|
|
590 #ifdef LISP_COMMAND_LOOP
|
|
|
591 UNGCPRO;
|
|
|
592 return Qnil;
|
|
|
593 #endif
|
|
|
594 }
|
|
|
595
|
|
|
596
|
|
|
597 /**********************************************************************/
|
|
|
598 /* Initialization */
|
|
|
599 /**********************************************************************/
|
|
|
600
|
|
|
601 void
|
|
|
602 syms_of_cmdloop (void)
|
|
|
603 {
|
|
|
604 defsymbol (&Qcommand_error, "command-error");
|
|
|
605 defsymbol (&Qreally_early_error_handler, "really-early-error-handler");
|
|
|
606 defsymbol (&Qtop_level, "top-level");
|
|
219
|
607 defsymbol (&Qerrors_deactivate_region, "errors-deactivate-region");
|
|
0
|
608
|
|
|
609 #ifndef LISP_COMMAND_LOOP
|
|
20
|
610 DEFSUBR (Frecursive_edit);
|
|
0
|
611 #endif
|
|
20
|
612 DEFSUBR (Freally_early_error_handler);
|
|
|
613 DEFSUBR (Fcommand_loop_1);
|
|
0
|
614 }
|
|
|
615
|
|
|
616 void
|
|
|
617 vars_of_cmdloop (void)
|
|
|
618 {
|
|
|
619 DEFVAR_INT ("command-loop-level", &command_loop_level /*
|
|
|
620 Number of recursive edits in progress.
|
|
|
621 */ );
|
|
|
622 command_loop_level = 0;
|
|
|
623
|
|
|
624 DEFVAR_LISP ("disabled-command-hook", &Vdisabled_command_hook /*
|
|
|
625 Value is called instead of any command that is disabled,
|
|
|
626 i.e. has a non-nil `disabled' property.
|
|
|
627 */ );
|
|
|
628 Vdisabled_command_hook = intern ("disabled-command-hook");
|
|
|
629
|
|
|
630 DEFVAR_LISP ("leave-window-hook", &Vleave_window_hook /*
|
|
|
631 Not yet implemented.
|
|
|
632 */ );
|
|
|
633 Vleave_window_hook = Qnil;
|
|
|
634
|
|
|
635 DEFVAR_LISP ("enter-window-hook", &Venter_window_hook /*
|
|
|
636 Not yet implemented.
|
|
|
637 */ );
|
|
|
638 Venter_window_hook = Qnil;
|
|
|
639
|
|
|
640 #ifndef LISP_COMMAND_LOOP
|
|
|
641 DEFVAR_LISP ("top-level", &Vtop_level /*
|
|
|
642 Form to evaluate when Emacs starts up.
|
|
|
643 Useful to set before you dump a modified Emacs.
|
|
|
644 */ );
|
|
|
645 Vtop_level = Qnil;
|
|
|
646 #else
|
|
|
647 DEFVAR_LISP ("command-loop", &Vcommand_loop /*
|
|
|
648 Function or one argument to call to read and process keyboard commands.
|
|
|
649 The passed argument specifies whether or not to handle errors.
|
|
|
650 */ );
|
|
|
651 Vcommand_loop = Qnil;
|
|
|
652 #endif /* LISP_COMMAND_LOOP */
|
|
|
653 }
|
