src/macros.c

   1 /* Keyboard macros.
   2    Copyright (C) 1985, 1986, 1993, 2000 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21
  22 #include <config.h>
  23 #include "lisp.h"
  24 #include "macros.h"
  25 #include "commands.h"
  26 #include "buffer.h"
  27 #include "window.h"
  28 #include "keyboard.h"
  29
  30 Lisp_Object Qexecute_kbd_macro;
  31
  32 /* Kbd macro currently being executed (a string or vector).  */
  33
  34 Lisp_Object Vexecuting_macro;
  35
  36 /* Index of next character to fetch from that macro.  */
  37
  38 int executing_macro_index;
  39
  40 /* Number of successful iterations so far
  41    for innermost keyboard macro.
  42    This is not bound at each level,
  43    so after an error, it describes the innermost interrupted macro.  */
  44
  45 int executing_macro_iterations;
  46
  47 /* This is the macro that was executing.
  48    This is not bound at each level,
  49    so after an error, it describes the innermost interrupted macro.
  50    We use it only as a kind of flag, so no need to protect it.  */
  51
  52 Lisp_Object executing_macro;
  53
  54 extern Lisp_Object real_this_command;
  55
  56 Lisp_Object Fexecute_kbd_macro ();
  57 \f
  58 DEFUN ("start-kbd-macro", Fstart_kbd_macro, Sstart_kbd_macro, 1, 1, "P",
  59   "Record subsequent keyboard input, defining a keyboard macro.\n\
  60 The commands are recorded even as they are executed.\n\
  61 Use \\[end-kbd-macro] to finish recording and make the macro available.\n\
  62 Use \\[name-last-kbd-macro] to give it a permanent name.\n\
  63 Non-nil arg (prefix arg) means append to last macro defined;\n\
  64  This begins by re-executing that macro as if you typed it again.")
  65   (append)
  66      Lisp_Object append;
  67 {
  68   if (!NILP (current_kboard->defining_kbd_macro))
  69     error ("Already defining kbd macro");
  70
  71   if (!current_kboard->kbd_macro_buffer)
  72     {
  73       current_kboard->kbd_macro_bufsize = 30;
  74       current_kboard->kbd_macro_buffer
  75         = (Lisp_Object *)xmalloc (30 * sizeof (Lisp_Object));
  76     }
  77   update_mode_lines++;
  78   if (NILP (append))
  79     {
  80       if (current_kboard->kbd_macro_bufsize > 200)
  81         {
  82           current_kboard->kbd_macro_bufsize = 30;
  83           current_kboard->kbd_macro_buffer
  84             = (Lisp_Object *)xrealloc (current_kboard->kbd_macro_buffer,
  85                                        30 * sizeof (Lisp_Object));
  86         }
  87       current_kboard->kbd_macro_ptr = current_kboard->kbd_macro_buffer;
  88       current_kboard->kbd_macro_end = current_kboard->kbd_macro_buffer;
  89       message ("Defining kbd macro...");
  90     }
  91   else
  92     {
  93       int i, len;
  94
  95       /* Check the type of last-kbd-macro in case Lisp code changed it.  */
  96       if (!STRINGP (current_kboard->Vlast_kbd_macro)
  97           && !VECTORP (current_kboard->Vlast_kbd_macro))
  98         current_kboard->Vlast_kbd_macro
  99           = wrong_type_argument (Qarrayp, current_kboard->Vlast_kbd_macro);
 100
 101       len = XINT (Flength (current_kboard->Vlast_kbd_macro));
 102
 103       /* Copy last-kbd-macro into the buffer, in case the Lisp code
 104          has put another macro there.  */
 105       if (current_kboard->kbd_macro_bufsize < len + 30)
 106         {
 107           current_kboard->kbd_macro_bufsize = len + 30;
 108           current_kboard->kbd_macro_buffer
 109             = (Lisp_Object *)xrealloc (current_kboard->kbd_macro_buffer,
 110                                        (len + 30) * sizeof (Lisp_Object));
 111         }
 112       for (i = 0; i < len; i++)
 113         current_kboard->kbd_macro_buffer[i]
 114           = Faref (current_kboard->Vlast_kbd_macro, make_number (i));
 115
 116       current_kboard->kbd_macro_ptr = current_kboard->kbd_macro_buffer + len;
 117       current_kboard->kbd_macro_end = current_kboard->kbd_macro_ptr;
 118
 119       /* Re-execute the macro we are appending to,
 120          for consistency of behavior.  */
 121       Fexecute_kbd_macro (current_kboard->Vlast_kbd_macro,
 122                           make_number (1));
 123
 124       message ("Appending to kbd macro...");
 125     }
 126   current_kboard->defining_kbd_macro = Qt;
 127
 128   return Qnil;
 129 }
 130
 131 DEFUN ("end-kbd-macro", Fend_kbd_macro, Send_kbd_macro, 0, 1, "p",
 132   "Finish defining a keyboard macro.\n\
 133 The definition was started by \\[start-kbd-macro].\n\
 134 The macro is now available for use via \\[call-last-kbd-macro],\n\
 135 or it can be given a name with \\[name-last-kbd-macro] and then invoked\n\
 136 under that name.\n\
 137 \n\
 138 With numeric arg, repeat macro now that many times,\n\
 139 counting the definition just completed as the first repetition.\n\
 140 An argument of zero means repeat until error.")
 141   (repeat)
 142      Lisp_Object repeat;
 143 {
 144   if (NILP (current_kboard->defining_kbd_macro))
 145     error ("Not defining kbd macro");
 146
 147   if (NILP (repeat))
 148     XSETFASTINT (repeat, 1);
 149   else
 150     CHECK_NUMBER (repeat, 0);
 151
 152   if (!NILP (current_kboard->defining_kbd_macro))
 153     {
 154       current_kboard->defining_kbd_macro = Qnil;
 155       update_mode_lines++;
 156       current_kboard->Vlast_kbd_macro
 157         = make_event_array ((current_kboard->kbd_macro_end
 158                              - current_kboard->kbd_macro_buffer),
 159                             current_kboard->kbd_macro_buffer);
 160       message ("Keyboard macro defined");
 161     }
 162
 163   if (XFASTINT (repeat) == 0)
 164     Fexecute_kbd_macro (current_kboard->Vlast_kbd_macro, repeat);
 165   else
 166     {
 167       XSETINT (repeat, XINT (repeat)-1);
 168       if (XINT (repeat) > 0)
 169         Fexecute_kbd_macro (current_kboard->Vlast_kbd_macro, repeat);
 170     }
 171   return Qnil;
 172 }
 173
 174 /* Store character c into kbd macro being defined */
 175
 176 void
 177 store_kbd_macro_char (c)
 178      Lisp_Object c;
 179 {
 180   if (!NILP (current_kboard->defining_kbd_macro))
 181     {
 182       if ((current_kboard->kbd_macro_ptr
 183            - current_kboard->kbd_macro_buffer)
 184           == current_kboard->kbd_macro_bufsize)
 185         {
 186           int offset = (current_kboard->kbd_macro_ptr
 187                         - current_kboard->kbd_macro_buffer);
 188           current_kboard->kbd_macro_bufsize *= 2;
 189           current_kboard->kbd_macro_buffer
 190             = (Lisp_Object *)xrealloc (current_kboard->kbd_macro_buffer,
 191                                        (current_kboard->kbd_macro_bufsize
 192                                         * sizeof (Lisp_Object)));
 193           current_kboard->kbd_macro_ptr
 194             = current_kboard->kbd_macro_buffer + offset;
 195           current_kboard->kbd_macro_end
 196             = (current_kboard->kbd_macro_buffer
 197                + current_kboard->kbd_macro_bufsize);
 198         }
 199
 200       *current_kboard->kbd_macro_ptr++ = c;
 201     }
 202 }
 203
 204 /* Declare that all chars stored so far in the kbd macro being defined
 205  really belong to it.  This is done in between editor commands.  */
 206
 207 void
 208 finalize_kbd_macro_chars ()
 209 {
 210   current_kboard->kbd_macro_end = current_kboard->kbd_macro_ptr;
 211 }
 212
 213 DEFUN ("cancel-kbd-macro-events", Fcancel_kbd_macro_events,
 214        Scancel_kbd_macro_events, 0, 0, 0,
 215   "Cancel the events added to a keyboard macro for this command.")
 216   ()
 217 {
 218   current_kboard->kbd_macro_ptr = current_kboard->kbd_macro_end;
 219   return Qnil;
 220 }
 221
 222 DEFUN ("store-kbd-macro-event", Fstore_kbd_macro_event,
 223        Sstore_kbd_macro_event, 1, 1, 0,
 224   "Store EVENT into the keyboard macro being defined.")
 225   (event)
 226      Lisp_Object event;
 227 {
 228   store_kbd_macro_char (event);
 229   return Qnil;
 230 }
 231 \f
 232 DEFUN ("call-last-kbd-macro", Fcall_last_kbd_macro, Scall_last_kbd_macro,
 233   0, 1, "p",
 234   "Call the last keyboard macro that you defined with \\[start-kbd-macro].\n\
 235 \n\
 236 A prefix argument serves as a repeat count.  Zero means repeat until error.\n\
 237 \n\
 238 To make a macro permanent so you can call it even after\n\
 239 defining others, use \\[name-last-kbd-macro].")
 240   (prefix)
 241      Lisp_Object prefix;
 242 {
 243   /* Don't interfere with recognition of the previous command
 244      from before this macro started.  */
 245   Vthis_command = current_kboard->Vlast_command;
 246   /* C-x z after the macro should repeat the macro.  */
 247   real_this_command = current_kboard->Vlast_kbd_macro;
 248
 249   if (! NILP (current_kboard->defining_kbd_macro))
 250     error ("Can't execute anonymous macro while defining one");
 251   else if (NILP (current_kboard->Vlast_kbd_macro))
 252     error ("No kbd macro has been defined");
 253   else
 254     Fexecute_kbd_macro (current_kboard->Vlast_kbd_macro, prefix);
 255
 256   /* command_loop_1 sets this to nil before it returns;
 257      get back the last command within the macro
 258      so that it can be last, again, after we return.  */
 259   Vthis_command = current_kboard->Vlast_command;
 260
 261   return Qnil;
 262 }
 263
 264 /* Restore Vexecuting_macro and executing_macro_index - called when
 265    the unwind-protect in Fexecute_kbd_macro gets invoked.  */
 266
 267 static Lisp_Object
 268 pop_kbd_macro (info)
 269      Lisp_Object info;
 270 {
 271   Lisp_Object tem;
 272   Vexecuting_macro = XCAR (info);
 273   tem = XCDR (info);
 274   executing_macro_index = XINT (XCAR (tem));
 275   real_this_command = XCDR (tem);
 276   return Qnil;
 277 }
 278
 279 DEFUN ("execute-kbd-macro", Fexecute_kbd_macro, Sexecute_kbd_macro, 1, 2, 0,
 280   "Execute MACRO as string of editor command characters.\n\
 281 If MACRO is a symbol, its function definition is used.\n\
 282 COUNT is a repeat count, or nil for once, or 0 for infinite loop.")
 283   (macro, count)
 284      Lisp_Object macro, count;
 285 {
 286   Lisp_Object final;
 287   Lisp_Object tem;
 288   int pdlcount = specpdl_ptr - specpdl;
 289   int repeat = 1;
 290   struct gcpro gcpro1;
 291   int success_count = 0;
 292
 293   executing_macro_iterations = 0;
 294
 295   if (!NILP (count))
 296     {
 297       count = Fprefix_numeric_value (count);
 298       repeat = XINT (count);
 299     }
 300
 301   final = indirect_function (macro);
 302   if (!STRINGP (final) && !VECTORP (final))
 303     error ("Keyboard macros must be strings or vectors");
 304
 305   tem = Fcons (Vexecuting_macro,
 306                Fcons (make_number (executing_macro_index),
 307                       real_this_command));
 308   record_unwind_protect (pop_kbd_macro, tem);
 309
 310   GCPRO1 (final);
 311   do
 312     {
 313       Vexecuting_macro = final;
 314       executing_macro = final;
 315       executing_macro_index = 0;
 316
 317       current_kboard->Vprefix_arg = Qnil;
 318       command_loop_1 ();
 319
 320       executing_macro_iterations = ++success_count;
 321
 322       QUIT;
 323     }
 324   while (--repeat
 325          && (STRINGP (Vexecuting_macro) || VECTORP (Vexecuting_macro)));
 326
 327   executing_macro = Qnil;
 328
 329   real_this_command = Vexecuting_macro;
 330
 331   UNGCPRO;
 332   return unbind_to (pdlcount, Qnil);
 333 }
 334 \f
 335 void
 336 init_macros ()
 337 {
 338   Vexecuting_macro = Qnil;
 339   executing_macro = Qnil;
 340 }
 341
 342 void
 343 syms_of_macros ()
 344 {
 345   Qexecute_kbd_macro = intern ("execute-kbd-macro");
 346   staticpro (&Qexecute_kbd_macro);
 347
 348   defsubr (&Sstart_kbd_macro);
 349   defsubr (&Send_kbd_macro);
 350   defsubr (&Scall_last_kbd_macro);
 351   defsubr (&Sexecute_kbd_macro);
 352   defsubr (&Scancel_kbd_macro_events);
 353   defsubr (&Sstore_kbd_macro_event);
 354
 355   DEFVAR_KBOARD ("defining-kbd-macro", defining_kbd_macro,
 356     "Non-nil while a keyboard macro is being defined.  Don't set this!");
 357
 358   DEFVAR_LISP ("executing-macro", &Vexecuting_macro,
 359     "Currently executing keyboard macro (string or vector); nil if none executing.");
 360
 361   DEFVAR_LISP_NOPRO ("executing-kbd-macro", &Vexecuting_macro,
 362     "Currently executing keyboard macro (string or vector); nil if none executing.");
 363
 364   DEFVAR_KBOARD ("last-kbd-macro", Vlast_kbd_macro,
 365     "Last kbd macro defined, as a string or vector; nil if none defined.");
 366 }
 367
 368 void
 369 keys_of_macros ()
 370 {
 371   initial_define_key (control_x_map, ('e'), "call-last-kbd-macro");
 372   initial_define_key (control_x_map, ('('), "start-kbd-macro");
 373   initial_define_key (control_x_map, (')'), "end-kbd-macro");
 374 }