src/macros.c

   1 /* Keyboard macros.
   2
   3 Copyright (C) 1985-1986, 1993, 2000-2011  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20
  21 #include <config.h>
  22 #include <setjmp.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, Qkbd_macro_termination_hook;
  31
  32 /* Number of successful iterations so far
  33    for innermost keyboard macro.
  34    This is not bound at each level,
  35    so after an error, it describes the innermost interrupted macro.  */
  36
  37 int executing_kbd_macro_iterations;
  38
  39 /* This is the macro that was executing.
  40    This is not bound at each level,
  41    so after an error, it describes the innermost interrupted macro.
  42    We use it only as a kind of flag, so no need to protect it.  */
  43
  44 Lisp_Object executing_kbd_macro;
  45
  46 Lisp_Object Fexecute_kbd_macro (Lisp_Object macro, Lisp_Object count, Lisp_Object loopfunc);
  47 \f
  48 DEFUN ("start-kbd-macro", Fstart_kbd_macro, Sstart_kbd_macro, 1, 2, "P",
  49        doc: /* Record subsequent keyboard input, defining a keyboard macro.
  50 The commands are recorded even as they are executed.
  51 Use \\[end-kbd-macro] to finish recording and make the macro available.
  52 Use \\[name-last-kbd-macro] to give it a permanent name.
  53 Non-nil arg (prefix arg) means append to last macro defined;
  54 this begins by re-executing that macro as if you typed it again.
  55 If optional second arg, NO-EXEC, is non-nil, do not re-execute last
  56 macro before appending to it. */)
  57   (Lisp_Object append, Lisp_Object no_exec)
  58 {
  59   if (!NILP (current_kboard->defining_kbd_macro))
  60     error ("Already defining kbd macro");
  61
  62   if (!current_kboard->kbd_macro_buffer)
  63     {
  64       current_kboard->kbd_macro_bufsize = 30;
  65       current_kboard->kbd_macro_buffer
  66         = (Lisp_Object *)xmalloc (30 * sizeof (Lisp_Object));
  67     }
  68   update_mode_lines++;
  69   if (NILP (append))
  70     {
  71       if (current_kboard->kbd_macro_bufsize > 200)
  72         {
  73           current_kboard->kbd_macro_bufsize = 30;
  74           current_kboard->kbd_macro_buffer
  75             = (Lisp_Object *)xrealloc (current_kboard->kbd_macro_buffer,
  76                                        30 * sizeof (Lisp_Object));
  77         }
  78       current_kboard->kbd_macro_ptr = current_kboard->kbd_macro_buffer;
  79       current_kboard->kbd_macro_end = current_kboard->kbd_macro_buffer;
  80       message ("Defining kbd macro...");
  81     }
  82   else
  83     {
  84       int i, len;
  85       int cvt;
  86
  87       /* Check the type of last-kbd-macro in case Lisp code changed it.  */
  88       CHECK_VECTOR_OR_STRING (current_kboard->Vlast_kbd_macro);
  89
  90       len = XINT (Flength (current_kboard->Vlast_kbd_macro));
  91
  92       /* Copy last-kbd-macro into the buffer, in case the Lisp code
  93          has put another macro there.  */
  94       if (current_kboard->kbd_macro_bufsize < len + 30)
  95         {
  96           current_kboard->kbd_macro_bufsize = len + 30;
  97           current_kboard->kbd_macro_buffer
  98             = (Lisp_Object *)xrealloc (current_kboard->kbd_macro_buffer,
  99                                        (len + 30) * sizeof (Lisp_Object));
 100         }
 101
 102       /* Must convert meta modifier when copying string to vector.  */
 103       cvt = STRINGP (current_kboard->Vlast_kbd_macro);
 104       for (i = 0; i < len; i++)
 105         {
 106           Lisp_Object c;
 107           c = Faref (current_kboard->Vlast_kbd_macro, make_number (i));
 108           if (cvt && NATNUMP (c) && (XFASTINT (c) & 0x80))
 109             XSETFASTINT (c, CHAR_META | (XFASTINT (c) & ~0x80));
 110           current_kboard->kbd_macro_buffer[i] = c;
 111         }
 112
 113       current_kboard->kbd_macro_ptr = current_kboard->kbd_macro_buffer + len;
 114       current_kboard->kbd_macro_end = current_kboard->kbd_macro_ptr;
 115
 116       /* Re-execute the macro we are appending to,
 117          for consistency of behavior.  */
 118       if (NILP (no_exec))
 119         Fexecute_kbd_macro (current_kboard->Vlast_kbd_macro,
 120                             make_number (1), Qnil);
 121
 122       message ("Appending to kbd macro...");
 123     }
 124   current_kboard->defining_kbd_macro = Qt;
 125
 126   return Qnil;
 127 }
 128
 129 /* Finish defining the current keyboard macro.  */
 130
 131 void
 132 end_kbd_macro (void)
 133 {
 134   current_kboard->defining_kbd_macro = Qnil;
 135   update_mode_lines++;
 136   current_kboard->Vlast_kbd_macro
 137     = make_event_array ((current_kboard->kbd_macro_end
 138                          - current_kboard->kbd_macro_buffer),
 139                         current_kboard->kbd_macro_buffer);
 140 }
 141
 142 DEFUN ("end-kbd-macro", Fend_kbd_macro, Send_kbd_macro, 0, 2, "p",
 143        doc: /* Finish defining a keyboard macro.
 144 The definition was started by \\[start-kbd-macro].
 145 The macro is now available for use via \\[call-last-kbd-macro],
 146 or it can be given a name with \\[name-last-kbd-macro] and then invoked
 147 under that name.
 148
 149 With numeric arg, repeat macro now that many times,
 150 counting the definition just completed as the first repetition.
 151 An argument of zero means repeat until error.
 152
 153 In Lisp, optional second arg LOOPFUNC may be a function that is called prior to
 154 each iteration of the macro.  Iteration stops if LOOPFUNC returns nil.  */)
 155   (Lisp_Object repeat, Lisp_Object loopfunc)
 156 {
 157   if (NILP (current_kboard->defining_kbd_macro))
 158     error ("Not defining kbd macro");
 159
 160   if (NILP (repeat))
 161     XSETFASTINT (repeat, 1);
 162   else
 163     CHECK_NUMBER (repeat);
 164
 165   if (!NILP (current_kboard->defining_kbd_macro))
 166     {
 167       end_kbd_macro ();
 168       message ("Keyboard macro defined");
 169     }
 170
 171   if (XFASTINT (repeat) == 0)
 172     Fexecute_kbd_macro (current_kboard->Vlast_kbd_macro, repeat, loopfunc);
 173   else
 174     {
 175       XSETINT (repeat, XINT (repeat)-1);
 176       if (XINT (repeat) > 0)
 177         Fexecute_kbd_macro (current_kboard->Vlast_kbd_macro, repeat, loopfunc);
 178     }
 179   return Qnil;
 180 }
 181
 182 /* Store character c into kbd macro being defined */
 183
 184 void
 185 store_kbd_macro_char (Lisp_Object c)
 186 {
 187   struct kboard *kb = current_kboard;
 188
 189   if (!NILP (kb->defining_kbd_macro))
 190     {
 191       if (kb->kbd_macro_ptr - kb->kbd_macro_buffer == kb->kbd_macro_bufsize)
 192         {
 193           int ptr_offset, end_offset, nbytes;
 194
 195           ptr_offset = kb->kbd_macro_ptr - kb->kbd_macro_buffer;
 196           end_offset = kb->kbd_macro_end - kb->kbd_macro_buffer;
 197           kb->kbd_macro_bufsize *= 2;
 198           nbytes = kb->kbd_macro_bufsize * sizeof *kb->kbd_macro_buffer;
 199           kb->kbd_macro_buffer
 200             = (Lisp_Object *) xrealloc (kb->kbd_macro_buffer, nbytes);
 201           kb->kbd_macro_ptr = kb->kbd_macro_buffer + ptr_offset;
 202           kb->kbd_macro_end = kb->kbd_macro_buffer + end_offset;
 203         }
 204
 205       *kb->kbd_macro_ptr++ = c;
 206     }
 207 }
 208
 209 /* Declare that all chars stored so far in the kbd macro being defined
 210  really belong to it.  This is done in between editor commands.  */
 211
 212 void
 213 finalize_kbd_macro_chars (void)
 214 {
 215   current_kboard->kbd_macro_end = current_kboard->kbd_macro_ptr;
 216 }
 217
 218 DEFUN ("cancel-kbd-macro-events", Fcancel_kbd_macro_events,
 219        Scancel_kbd_macro_events, 0, 0, 0,
 220        doc: /* Cancel the events added to a keyboard macro for this command.  */)
 221   (void)
 222 {
 223   current_kboard->kbd_macro_ptr = current_kboard->kbd_macro_end;
 224   return Qnil;
 225 }
 226
 227 DEFUN ("store-kbd-macro-event", Fstore_kbd_macro_event,
 228        Sstore_kbd_macro_event, 1, 1, 0,
 229        doc: /* Store EVENT into the keyboard macro being defined.  */)
 230   (Lisp_Object event)
 231 {
 232   store_kbd_macro_char (event);
 233   return Qnil;
 234 }
 235 \f
 236 DEFUN ("call-last-kbd-macro", Fcall_last_kbd_macro, Scall_last_kbd_macro,
 237        0, 2, "p",
 238        doc: /* Call the last keyboard macro that you defined with \\[start-kbd-macro].
 239
 240 A prefix argument serves as a repeat count.  Zero means repeat until error.
 241
 242 To make a macro permanent so you can call it even after
 243 defining others, use \\[name-last-kbd-macro].
 244
 245 In Lisp, optional second arg LOOPFUNC may be a function that is called prior to
 246 each iteration of the macro.  Iteration stops if LOOPFUNC returns nil.  */)
 247   (Lisp_Object prefix, Lisp_Object loopfunc)
 248 {
 249   /* Don't interfere with recognition of the previous command
 250      from before this macro started.  */
 251   Vthis_command = current_kboard->Vlast_command;
 252   /* C-x z after the macro should repeat the macro.  */
 253   real_this_command = current_kboard->Vlast_kbd_macro;
 254
 255   if (! NILP (current_kboard->defining_kbd_macro))
 256     error ("Can't execute anonymous macro while defining one");
 257   else if (NILP (current_kboard->Vlast_kbd_macro))
 258     error ("No kbd macro has been defined");
 259   else
 260     Fexecute_kbd_macro (current_kboard->Vlast_kbd_macro, prefix, loopfunc);
 261
 262   /* command_loop_1 sets this to nil before it returns;
 263      get back the last command within the macro
 264      so that it can be last, again, after we return.  */
 265   Vthis_command = current_kboard->Vlast_command;
 266
 267   return Qnil;
 268 }
 269
 270 /* Restore Vexecuting_kbd_macro and executing_kbd_macro_index.
 271    Called when the unwind-protect in Fexecute_kbd_macro gets invoked.  */
 272
 273 static Lisp_Object
 274 pop_kbd_macro (Lisp_Object info)
 275 {
 276   Lisp_Object tem;
 277   Vexecuting_kbd_macro = XCAR (info);
 278   tem = XCDR (info);
 279   executing_kbd_macro_index = XINT (XCAR (tem));
 280   real_this_command = XCDR (tem);
 281   Frun_hooks (1, &Qkbd_macro_termination_hook);
 282   return Qnil;
 283 }
 284
 285 DEFUN ("execute-kbd-macro", Fexecute_kbd_macro, Sexecute_kbd_macro, 1, 3, 0,
 286        doc: /* Execute MACRO as string of editor command characters.
 287 If MACRO is a symbol, its function definition is used.
 288 COUNT is a repeat count, or nil for once, or 0 for infinite loop.
 289
 290 Optional third arg LOOPFUNC may be a function that is called prior to
 291 each iteration of the macro.  Iteration stops if LOOPFUNC returns nil.  */)
 292   (Lisp_Object macro, Lisp_Object count, Lisp_Object loopfunc)
 293 {
 294   Lisp_Object final;
 295   Lisp_Object tem;
 296   int pdlcount = SPECPDL_INDEX ();
 297   int repeat = 1;
 298   struct gcpro gcpro1, gcpro2;
 299   int success_count = 0;
 300
 301   executing_kbd_macro_iterations = 0;
 302
 303   if (!NILP (count))
 304     {
 305       count = Fprefix_numeric_value (count);
 306       repeat = XINT (count);
 307     }
 308
 309   final = indirect_function (macro);
 310   if (!STRINGP (final) && !VECTORP (final))
 311     error ("Keyboard macros must be strings or vectors");
 312
 313   tem = Fcons (Vexecuting_kbd_macro,
 314                Fcons (make_number (executing_kbd_macro_index),
 315                       real_this_command));
 316   record_unwind_protect (pop_kbd_macro, tem);
 317
 318   GCPRO2 (final, loopfunc);
 319   do
 320     {
 321       Vexecuting_kbd_macro = final;
 322       executing_kbd_macro = final;
 323       executing_kbd_macro_index = 0;
 324
 325       current_kboard->Vprefix_arg = Qnil;
 326
 327       if (!NILP (loopfunc))
 328         {
 329           Lisp_Object cont;
 330           cont = call0 (loopfunc);
 331           if (NILP (cont))
 332             break;
 333         }
 334
 335       command_loop_1 ();
 336
 337       executing_kbd_macro_iterations = ++success_count;
 338
 339       QUIT;
 340     }
 341   while (--repeat
 342          && (STRINGP (Vexecuting_kbd_macro) || VECTORP (Vexecuting_kbd_macro)));
 343
 344   executing_kbd_macro = Qnil;
 345
 346   real_this_command = Vexecuting_kbd_macro;
 347
 348   UNGCPRO;
 349   return unbind_to (pdlcount, Qnil);
 350 }
 351 \f
 352 void
 353 init_macros (void)
 354 {
 355   Vexecuting_kbd_macro = Qnil;
 356   executing_kbd_macro = Qnil;
 357 }
 358
 359 void
 360 syms_of_macros (void)
 361 {
 362   Qexecute_kbd_macro = intern_c_string ("execute-kbd-macro");
 363   staticpro (&Qexecute_kbd_macro);
 364
 365   DEFVAR_LISP ("kbd-macro-termination-hook", Vkbd_macro_termination_hook,
 366                doc: /* Normal hook run whenever a keyboard macro terminates.
 367 This is run whether the macro ends normally or prematurely due to an error.  */);
 368   Vkbd_macro_termination_hook = Qnil;
 369   Qkbd_macro_termination_hook = intern_c_string ("kbd-macro-termination-hook");
 370   staticpro (&Qkbd_macro_termination_hook);
 371
 372   defsubr (&Sstart_kbd_macro);
 373   defsubr (&Send_kbd_macro);
 374   defsubr (&Scall_last_kbd_macro);
 375   defsubr (&Sexecute_kbd_macro);
 376   defsubr (&Scancel_kbd_macro_events);
 377   defsubr (&Sstore_kbd_macro_event);
 378
 379   DEFVAR_KBOARD ("defining-kbd-macro", defining_kbd_macro,
 380                  doc: /* Non-nil while a keyboard macro is being defined.  Don't set this!
 381 The value is the symbol `append' while appending to the definition of
 382 an existing macro.  */);
 383
 384   DEFVAR_LISP ("executing-kbd-macro", Vexecuting_kbd_macro,
 385                doc: /* Currently executing keyboard macro (string or vector).
 386 This is nil when not executing a keyboard macro.  */);
 387
 388   DEFVAR_INT ("executing-kbd-macro-index", executing_kbd_macro_index,
 389               doc: /* Index in currently executing keyboard macro; undefined if none executing.  */);
 390
 391   DEFVAR_KBOARD ("last-kbd-macro", Vlast_kbd_macro,
 392                  doc: /* Last kbd macro defined, as a string or vector; nil if none defined.  */);
 393 }
 394