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