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428
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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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458
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41 Fixnum command_loop_level;
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428
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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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59 /* Variable defined in Lisp. */
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60 Lisp_Object Qerrors_deactivate_region;
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61
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62 Lisp_Object Qtop_level;
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63
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64 static Lisp_Object command_loop_1 (Lisp_Object dummy);
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65 EXFUN (Fcommand_loop_1, 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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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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83 Fding (Qnil, Qnil, Qnil);
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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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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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93 Fset (intern ("last-error"), data);
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94 clear_echo_area (selected_frame (), Qnil, 0);
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95 Fdisplay_error (data, Qt);
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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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101 DEFUN ("really-early-error-handler", Freally_early_error_handler, 1, 1, 0, /*
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102 You should almost certainly not be using this.
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103 */
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104 (x))
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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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442
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124 #ifdef HAVE_MS_WINDOWS
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125 Fmswindows_message_box (build_string ("Initialization error"),
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126 Qnil, Qnil);
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127 #endif
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428
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128 return Fkill_emacs (make_int (-1));
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129 }
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130
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131
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132 /**********************************************************************/
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133 /* Command-loop (in C) */
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134 /**********************************************************************/
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135
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136 #ifndef LISP_COMMAND_LOOP
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137
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138 /* The guts of the command loop are in command_loop_1(). This function
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139 doesn't catch errors, though -- that's the job of command_loop_2(),
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140 which is a condition-case wrapper around command_loop_1().
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141 command_loop_1() never returns, but may get thrown out of.
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142
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143 When an error occurs, cmd_error() is called, which usually
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144 invokes the Lisp error handler in `command-error'; however,
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145 a default error handler is provided if `command-error' is nil
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146 (e.g. during startup). The purpose of the error handler is
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147 simply to display the error message and do associated cleanup;
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148 it does not need to throw anywhere. When the error handler
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149 finishes, the condition-case in command_loop_2() will finish and
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150 command_loop_2() will reinvoke command_loop_1().
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151
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152 command_loop_2() is invoked from three places: from
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153 initial_command_loop() (called from main() at the end of
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154 internal initialization), from the Lisp function `recursive-edit',
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155 and from call_command_loop().
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156
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157 call_command_loop() is called when a macro is started and when the
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158 minibuffer is entered; normal termination of the macro or
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159 minibuffer causes a throw out of the recursive command loop. (To
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160 'execute-kbd-macro for macros and 'exit for minibuffers. Note also
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161 that the low-level minibuffer-entering function,
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162 `read-minibuffer-internal', provides its own error handling and
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163 does not need command_loop_2()'s error encapsulation; so it tells
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164 call_command_loop() to invoke command_loop_1() directly.)
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165
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166 Note that both read-minibuffer-internal and recursive-edit set
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167 up a catch for 'exit; this is why `abort-recursive-edit', which
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168 throws to this catch, exits out of either one.
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169
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170 initial_command_loop(), called from main(), sets up a catch
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171 for 'top-level when invoking command_loop_2(), allowing functions
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172 to throw all the way to the top level if they really need to.
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173 Before invoking command_loop_2(), initial_command_loop() calls
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174 top_level_1(), which handles all of the startup stuff (creating
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175 the initial frame, handling the command-line options, loading
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176 the user's .emacs file, etc.). The function that actually does this
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177 is in Lisp and is pointed to by the variable `top-level';
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178 normally this function is `normal-top-level'. top_level_1() is
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179 just an error-handling wrapper similar to command_loop_2().
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180 Note also that initial_command_loop() sets up a catch for 'top-level
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181 when invoking top_level_1(), just like when it invokes
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182 command_loop_2(). */
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183
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184
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185 static Lisp_Object
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186 cmd_error (Lisp_Object data, Lisp_Object dummy)
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187 {
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188 /* This function can GC */
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189 check_quit (); /* make Vquit_flag accurate */
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190 Vquit_flag = Qnil;
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191
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192 any_console_state ();
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193
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194 if (!NILP (Ffboundp (Qcommand_error)))
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195 return call1 (Qcommand_error, data);
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196
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197 return default_error_handler (data);
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198 }
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199
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200 static Lisp_Object
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201 top_level_1 (Lisp_Object dummy)
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202 {
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203 /* This function can GC */
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204 /* On entry to the outer level, run the startup file */
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205 if (!NILP (Vtop_level))
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206 condition_case_1 (Qerror, Feval, Vtop_level, cmd_error, Qnil);
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207 #if 1
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208 else
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|
|
209 {
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|
|
210 message ("\ntemacs can only be run in -batch mode.");
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|
|
211 noninteractive = 1; /* prevent things under kill-emacs from blowing up */
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|
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212 Fkill_emacs (make_int (-1));
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|
|
213 }
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|
|
214 #else
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|
215 else if (purify_flag)
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216 message ("Bare impure Emacs (standard Lisp code not loaded)");
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217 else
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|
|
218 message ("Bare Emacs (standard Lisp code not loaded)");
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|
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219 #endif
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220
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|
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221 return Qnil;
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|
|
222 }
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|
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223
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|
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224 /* Here we catch errors in execution of commands within the
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225 editing loop, and reenter the editing loop.
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226 When there is an error, cmd_error runs and the call
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|
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227 to condition_case_1() returns. */
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228
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|
|
229 /* Avoid confusing the compiler. A helper function for command_loop_2 */
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|
|
230 static DOESNT_RETURN
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|
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231 command_loop_3 (void)
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|
|
232 {
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|
|
233 #ifdef LWLIB_MENUBARS_LUCID
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|
|
234 extern int in_menu_callback; /* defined in menubar-x.c */
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|
|
235 #endif /* LWLIB_MENUBARS_LUCID */
|
|
|
236
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|
|
237 #ifdef LWLIB_MENUBARS_LUCID
|
|
|
238 /*
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|
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239 * #### Fix the menu code so this isn't necessary.
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|
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240 *
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241 * We cannot allow the lwmenu code to be reentered, because the
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242 * code is not written to be reentrant and will crash. Therefore
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243 * paths from the menu callbacks back into the menu code have to
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244 * be blocked. Fnext_event is the normal path into the menu code,
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245 * but waiting to signal an error there is too late in case where
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246 * a new command loop has been started. The error will be caught
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247 * and Fnext_event will be called again, looping forever. So we
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248 * signal an error here to avoid the loop.
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|
|
249 */
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|
|
250 if (in_menu_callback)
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|
|
251 error ("Attempt to enter command_loop_3 inside menu callback");
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|
|
252 #endif /* LWLIB_MENUBARS_LUCID */
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|
|
253 /* This function can GC */
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|
|
254 for (;;)
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|
|
255 {
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|
|
256 condition_case_1 (Qerror, command_loop_1, Qnil, cmd_error, Qnil);
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|
|
257 /* #### wrong with selected-console? */
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|
|
258 /* See command in initial_command_loop about why this value
|
|
|
259 is 0. */
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|
|
260 reset_this_command_keys (Vselected_console, 0);
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|
|
261 }
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|
|
262 }
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|
|
263
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|
|
264 static Lisp_Object
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|
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265 command_loop_2 (Lisp_Object dummy)
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|
|
266 {
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|
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267 command_loop_3(); /* doesn't return */
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|
268 return Qnil;
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|
|
269 }
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|
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270
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|
|
271 /* This is called from emacs.c when it's done with initialization. */
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272
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273 DOESNT_RETURN
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|
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274 initial_command_loop (Lisp_Object load_me)
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275 {
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276 /* This function can GC */
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277 if (!NILP (load_me))
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278 Vtop_level = list2 (Qload, load_me);
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279
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|
|
280 /* First deal with startup and command-line arguments. A throw
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281 to 'top-level gets us back here directly (does this ever happen?).
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282 Otherwise, this function will return normally when all command-
|
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|
283 line arguments have been processed, the user's initialization
|
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|
284 file has been read in, and the first frame has been created. */
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|
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285 internal_catch (Qtop_level, top_level_1, Qnil, 0);
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|
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286
|
|
|
287 /* If an error occurred during startup and the initial console
|
|
|
288 wasn't created, then die now (the error was already printed out
|
|
|
289 on the terminal device). */
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|
|
290 if (!noninteractive &&
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|
|
291 (!CONSOLEP (Vselected_console) ||
|
|
|
292 CONSOLE_STREAM_P (XCONSOLE (Vselected_console))))
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|
|
293 Fkill_emacs (make_int (-1));
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|
|
294
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|
|
295 /* End of -batch run causes exit here. */
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|
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296 if (noninteractive)
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|
|
297 Fkill_emacs (Qt);
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|
|
298
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|
|
299 for (;;)
|
|
|
300 {
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|
|
301 command_loop_level = 0;
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|
|
302 MARK_MODELINE_CHANGED;
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|
|
303 /* Now invoke the command loop. It never returns; however, a
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|
304 throw to 'top-level will place us at the end of this loop. */
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|
|
305 internal_catch (Qtop_level, command_loop_2, Qnil, 0);
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|
|
306 /* #### wrong with selected-console? */
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|
|
307 /* We don't actually call clear_echo_area() here, partially
|
|
|
308 at least because that runs Lisp code and it may be unsafe
|
|
|
309 to do so -- we are outside of the normal catches for
|
|
|
310 errors and such. */
|
|
|
311 reset_this_command_keys (Vselected_console, 0);
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|
|
312 }
|
|
|
313 }
|
|
|
314
|
|
|
315 /* This function is invoked when a macro or minibuffer starts up.
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|
|
316 Normal termination of the macro or minibuffer causes a throw past us.
|
|
|
317 See the comment above.
|
|
|
318
|
|
|
319 Note that this function never returns (but may be thrown out of). */
|
|
|
320
|
|
|
321 Lisp_Object
|
|
|
322 call_command_loop (Lisp_Object catch_errors)
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|
|
323 {
|
|
|
324 /* This function can GC */
|
|
|
325 if (NILP (catch_errors))
|
|
|
326 return (command_loop_1 (Qnil));
|
|
|
327 else
|
|
|
328 return (command_loop_2 (Qnil));
|
|
|
329 }
|
|
|
330
|
|
|
331 static Lisp_Object
|
|
|
332 recursive_edit_unwind (Lisp_Object buffer)
|
|
|
333 {
|
|
|
334 if (!NILP (buffer))
|
|
|
335 Fset_buffer (buffer);
|
|
|
336
|
|
|
337 command_loop_level--;
|
|
|
338 MARK_MODELINE_CHANGED;
|
|
|
339
|
|
|
340 return Qnil;
|
|
|
341 }
|
|
|
342
|
|
|
343 DEFUN ("recursive-edit", Frecursive_edit, 0, 0, "", /*
|
|
|
344 Invoke the editor command loop recursively.
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|
|
345 To get out of the recursive edit, a command can do `(throw 'exit nil)';
|
|
|
346 that tells this function to return.
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|
|
347 Alternately, `(throw 'exit t)' makes this function signal an error.
|
|
|
348 */
|
|
|
349 ())
|
|
|
350 {
|
|
|
351 /* This function can GC */
|
|
|
352 Lisp_Object val;
|
|
|
353 int speccount = specpdl_depth ();
|
|
|
354
|
|
|
355 command_loop_level++;
|
|
|
356 MARK_MODELINE_CHANGED;
|
|
|
357
|
|
|
358 record_unwind_protect (recursive_edit_unwind,
|
|
|
359 ((current_buffer
|
|
|
360 != XBUFFER (XWINDOW (Fselected_window
|
|
|
361 (Qnil))->buffer))
|
|
|
362 ? Fcurrent_buffer ()
|
|
|
363 : Qnil));
|
|
|
364
|
|
|
365 specbind (Qstandard_output, Qt);
|
|
|
366 specbind (Qstandard_input, Qt);
|
|
|
367
|
|
|
368 val = internal_catch (Qexit, command_loop_2, Qnil, 0);
|
|
|
369
|
|
|
370 if (EQ (val, Qt))
|
|
|
371 /* Turn abort-recursive-edit into a quit. */
|
|
|
372 Fsignal (Qquit, Qnil);
|
|
|
373
|
|
|
374 return unbind_to (speccount, Qnil);
|
|
|
375 }
|
|
|
376
|
|
|
377 #endif /* !LISP_COMMAND_LOOP */
|
|
|
378
|
|
|
379
|
|
|
380 /**********************************************************************/
|
|
|
381 /* Alternate command-loop (largely in Lisp) */
|
|
|
382 /**********************************************************************/
|
|
|
383
|
|
|
384 #ifdef LISP_COMMAND_LOOP
|
|
|
385
|
|
|
386 static Lisp_Object
|
|
|
387 load1 (Lisp_Object name)
|
|
|
388 {
|
|
|
389 /* This function can GC */
|
|
|
390 call4 (Qload, name, Qnil, Qt, Qnil);
|
|
|
391 return (Qnil);
|
|
|
392 }
|
|
|
393
|
|
|
394 /* emergency backups for cold-load-stream use */
|
|
|
395 static Lisp_Object
|
|
|
396 cold_load_command_error (Lisp_Object datum, Lisp_Object ignored)
|
|
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397 {
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398 /* This function can GC */
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|
|
399 check_quit (); /* make Vquit_flag accurate */
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|
400 Vquit_flag = Qnil;
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401
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402 return default_error_handler (datum);
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|
|
403 }
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404
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|
405 static Lisp_Object
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406 cold_load_command_loop (Lisp_Object dummy)
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|
407 {
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|
408 /* This function can GC */
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|
409 return (condition_case_1 (Qt,
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410 command_loop_1, Qnil,
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|
411 cold_load_command_error, Qnil));
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|
|
412 }
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413
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414 Lisp_Object
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415 call_command_loop (Lisp_Object catch_errors)
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416 {
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417 /* This function can GC */
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418 reset_this_command_keys (Vselected_console, Qnil); /* #### bleagh */
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419
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420 loop:
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|
421 for (;;)
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422 {
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|
423 if (NILP (Vcommand_loop))
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424 break;
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|
425 call1 (Vcommand_loop, catch_errors);
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426 }
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|
427
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|
428 /* This isn't a "correct" definition, but you're pretty hosed if
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429 you broke "command-loop" anyway */
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430 /* #### not correct with Vselected_console */
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431 XCONSOLE (Vselected_console)->prefix_arg = Qnil;
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432 if (NILP (catch_errors))
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433 Fcommand_loop_1 ();
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434 else
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435 internal_catch (Qtop_level,
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436 cold_load_command_loop, Qnil, 0);
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437 goto loop;
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438 return Qnil;
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439 }
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440
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441 static Lisp_Object
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442 initial_error_handler (Lisp_Object datum, Lisp_Object ignored)
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443 {
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444 /* This function can GC */
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445 Vcommand_loop = Qnil;
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446 Fding (Qnil, Qnil, Qnil);
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447
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448 if (CONSP (datum) && EQ (XCAR (datum), Qquit))
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449 /* Don't bother with the message */
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450 return (Qt);
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451
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452 message ("Error in command-loop!!");
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453 Fset (intern ("last-error"), datum); /* #### Better/different name? */
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454 Fsit_for (make_int (2), Qnil);
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455 cold_load_command_error (datum, Qnil);
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456 return (Qt);
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457 }
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458
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459 DOESNT_RETURN
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|
460 initial_command_loop (Lisp_Object load_me)
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461 {
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|
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462 /* This function can GC */
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463 if (!NILP (load_me))
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|
|
464 {
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|
465 if (!NILP (condition_case_1 (Qt, load1, load_me,
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|
|
466 initial_error_handler, Qnil)))
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|
|
467 Fkill_emacs (make_int (-1));
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|
|
468 }
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|
|
469
|
|
|
470 for (;;)
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|
|
471 {
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|
472 command_loop_level = 0;
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|
|
473 MARK_MODELINE_CHANGED;
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|
|
474
|
|
|
475 condition_case_1 (Qt,
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|
|
476 call_command_loop, Qtop_level,
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|
|
477 initial_error_handler, Qnil);
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|
|
478 }
|
|
|
479 }
|
|
|
480
|
|
|
481 #endif /* LISP_COMMAND_LOOP */
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|
|
482
|
|
|
483
|
|
|
484 /**********************************************************************/
|
|
|
485 /* Guts of command loop */
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|
|
486 /**********************************************************************/
|
|
|
487
|
|
|
488 static Lisp_Object
|
|
|
489 command_loop_1 (Lisp_Object dummy)
|
|
|
490 {
|
|
|
491 /* This function can GC */
|
|
|
492 /* #### not correct with Vselected_console */
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|
|
493 XCONSOLE (Vselected_console)->prefix_arg = Qnil;
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|
|
494 return (Fcommand_loop_1 ());
|
|
|
495 }
|
|
|
496
|
|
|
497 /* This is the actual command reading loop, sans error-handling
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|
|
498 encapsulation. This is used for both the C and Lisp command
|
|
|
499 loops. Originally this function was written in Lisp when
|
|
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500 the Lisp command loop was used, but it was too slow that way.
|
|
|
501
|
|
|
502 Under the C command loop, this function will never return
|
|
|
503 (although someone might throw past it). Under the Lisp
|
|
|
504 command loop, this will return only when the user specifies
|
|
|
505 a new command loop by changing the command-loop variable. */
|
|
|
506
|
|
|
507 DEFUN ("command-loop-1", Fcommand_loop_1, 0, 0, 0, /*
|
|
|
508 Invoke the internals of the canonical editor command loop.
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|
|
509 Don't call this unless you know what you're doing.
|
|
|
510 */
|
|
|
511 ())
|
|
|
512 {
|
|
|
513 /* This function can GC */
|
|
|
514 Lisp_Object event = Fmake_event (Qnil, Qnil);
|
|
|
515 Lisp_Object old_loop = Qnil;
|
|
|
516 struct gcpro gcpro1, gcpro2;
|
|
|
517 int was_locked = in_single_console_state ();
|
|
|
518 GCPRO2 (event, old_loop);
|
|
|
519
|
|
|
520 /* cancel_echoing (); */
|
|
|
521 /* This magically makes single character keyboard macros work just
|
|
|
522 like the real thing. This is slightly bogus, but it's in here for
|
|
|
523 compatibility with Emacs 18. It's not even clear what the "right
|
|
|
524 thing" is. */
|
|
434
|
525 if (!((STRINGP (Vexecuting_macro) || VECTORP (Vexecuting_macro))
|
|
|
526 && XINT (Flength (Vexecuting_macro)) == 1))
|
|
428
|
527 Vlast_command = Qt;
|
|
|
528
|
|
|
529 #ifndef LISP_COMMAND_LOOP
|
|
|
530 while (1)
|
|
|
531 #else
|
|
|
532 old_loop = Vcommand_loop;
|
|
|
533 while (EQ (Vcommand_loop, old_loop))
|
|
|
534 #endif /* LISP_COMMAND_LOOP */
|
|
|
535 {
|
|
|
536 /* If focus_follows_mouse, make sure the frame with window manager
|
|
|
537 focus is selected. */
|
|
|
538 if (focus_follows_mouse)
|
|
|
539 investigate_frame_change ();
|
|
434
|
540
|
|
428
|
541 /* Make sure the current window's buffer is selected. */
|
|
|
542 {
|
|
|
543 Lisp_Object selected_window = Fselected_window (Qnil);
|
|
|
544
|
|
|
545 if (!NILP (selected_window) &&
|
|
|
546 (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer))
|
|
|
547 {
|
|
|
548 set_buffer_internal (XBUFFER (XWINDOW (selected_window)->buffer));
|
|
|
549 }
|
|
|
550 }
|
|
|
551
|
|
444
|
552 #if 0 /* What's wrong with going through ordinary procedure of quit?
|
|
|
553 quitting here leaves overriding-terminal-local-map
|
|
|
554 when you type C-u C-u C-g. */
|
|
428
|
555 /* If ^G was typed before we got here (that is, before emacs was
|
|
|
556 idle and waiting for input) then we treat that as an interrupt. */
|
|
|
557 QUIT;
|
|
444
|
558 #endif
|
|
428
|
559
|
|
|
560 /* If minibuffer on and echo area in use, wait 2 sec and redraw
|
|
|
561 minibuffer. Treat a ^G here as a command, not an interrupt.
|
|
|
562 */
|
|
|
563 if (minibuf_level > 0 && echo_area_active (selected_frame ()))
|
|
|
564 {
|
|
|
565 /* Bind dont_check_for_quit to 1 so that C-g gets read in
|
|
|
566 rather than quitting back to the minibuffer. */
|
|
|
567 int count = specpdl_depth ();
|
|
|
568 begin_dont_check_for_quit ();
|
|
|
569 Fsit_for (make_int (2), Qnil);
|
|
|
570 clear_echo_area (selected_frame (), Qnil, 0);
|
|
|
571 unbind_to (count, Qnil);
|
|
|
572 }
|
|
|
573
|
|
|
574 Fnext_event (event, Qnil);
|
|
|
575 /* If ^G was typed while emacs was reading input from the user, then
|
|
|
576 Fnext_event() will have read it as a normal event and
|
|
|
577 next_event_internal() will have set Vquit_flag. We reset this
|
|
|
578 so that the ^G is treated as just another key. This is strange,
|
|
|
579 but it is what emacs 18 did.
|
|
|
580
|
|
|
581 Do not call check_quit() here. */
|
|
|
582 Vquit_flag = Qnil;
|
|
|
583 Fdispatch_event (event);
|
|
|
584
|
|
|
585 if (!was_locked)
|
|
|
586 any_console_state ();
|
|
|
587 #if (defined (_MSC_VER) \
|
|
|
588 || defined (__SUNPRO_C) \
|
|
|
589 || defined (__SUNPRO_CC) \
|
|
|
590 || (defined (DEC_ALPHA) \
|
|
|
591 && defined (OSF1)))
|
|
|
592 if (0) return Qnil; /* Shut up compiler */
|
|
|
593 #endif
|
|
|
594 }
|
|
|
595 #ifdef LISP_COMMAND_LOOP
|
|
|
596 UNGCPRO;
|
|
|
597 return Qnil;
|
|
|
598 #endif
|
|
|
599 }
|
|
|
600
|
|
|
601
|
|
|
602 /**********************************************************************/
|
|
|
603 /* Initialization */
|
|
|
604 /**********************************************************************/
|
|
|
605
|
|
|
606 void
|
|
|
607 syms_of_cmdloop (void)
|
|
|
608 {
|
|
|
609 defsymbol (&Qcommand_error, "command-error");
|
|
|
610 defsymbol (&Qreally_early_error_handler, "really-early-error-handler");
|
|
|
611 defsymbol (&Qtop_level, "top-level");
|
|
|
612 defsymbol (&Qerrors_deactivate_region, "errors-deactivate-region");
|
|
|
613
|
|
|
614 #ifndef LISP_COMMAND_LOOP
|
|
|
615 DEFSUBR (Frecursive_edit);
|
|
|
616 #endif
|
|
|
617 DEFSUBR (Freally_early_error_handler);
|
|
|
618 DEFSUBR (Fcommand_loop_1);
|
|
|
619 }
|
|
|
620
|
|
|
621 void
|
|
|
622 vars_of_cmdloop (void)
|
|
|
623 {
|
|
|
624 DEFVAR_INT ("command-loop-level", &command_loop_level /*
|
|
|
625 Number of recursive edits in progress.
|
|
|
626 */ );
|
|
|
627 command_loop_level = 0;
|
|
|
628
|
|
|
629 DEFVAR_LISP ("disabled-command-hook", &Vdisabled_command_hook /*
|
|
|
630 Value is called instead of any command that is disabled,
|
|
|
631 i.e. has a non-nil `disabled' property.
|
|
|
632 */ );
|
|
|
633 Vdisabled_command_hook = intern ("disabled-command-hook");
|
|
|
634
|
|
|
635 DEFVAR_LISP ("leave-window-hook", &Vleave_window_hook /*
|
|
|
636 Not yet implemented.
|
|
|
637 */ );
|
|
|
638 Vleave_window_hook = Qnil;
|
|
|
639
|
|
|
640 DEFVAR_LISP ("enter-window-hook", &Venter_window_hook /*
|
|
|
641 Not yet implemented.
|
|
|
642 */ );
|
|
|
643 Venter_window_hook = Qnil;
|
|
|
644
|
|
|
645 #ifndef LISP_COMMAND_LOOP
|
|
|
646 DEFVAR_LISP ("top-level", &Vtop_level /*
|
|
|
647 Form to evaluate when Emacs starts up.
|
|
|
648 Useful to set before you dump a modified Emacs.
|
|
|
649 */ );
|
|
|
650 Vtop_level = Qnil;
|
|
|
651 #else
|
|
|
652 DEFVAR_LISP ("command-loop", &Vcommand_loop /*
|
|
|
653 Function or one argument to call to read and process keyboard commands.
|
|
|
654 The passed argument specifies whether or not to handle errors.
|
|
|
655 */ );
|
|
|
656 Vcommand_loop = Qnil;
|
|
|
657 #endif /* LISP_COMMAND_LOOP */
|
|
|
658 }
|
