lisp/macros.el

   1 ;;; macros.el --- non-primitive commands for keyboard macros.
   2
   3 ;; Copyright (C) 1985, 86, 87, 92, 94, 95 Free Software Foundation, Inc.
   4
   5 ;; Maintainer: FSF
   6 ;; Keywords: abbrev
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  22 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 ;;; Commentary:
  25
  26 ;; Extension commands for keyboard macros.  These permit you to assign
  27 ;; a name to the last-defined keyboard macro, expand and insert the
  28 ;; lisp corresponding to a macro, query the user from within a macro,
  29 ;; or apply a macro to each line in the reason.
  30
  31 ;;; Code:
  32
  33 ;;;###autoload
  34 (defun name-last-kbd-macro (symbol)
  35   "Assign a name to the last keyboard macro defined.
  36 Argument SYMBOL is the name to define.
  37 The symbol's function definition becomes the keyboard macro string.
  38 Such a \"function\" cannot be called from Lisp, but it is a valid editor command."
  39   (interactive "SName for last kbd macro: ")
  40   (or last-kbd-macro
  41       (error "No keyboard macro defined"))
  42   (and (fboundp symbol)
  43        (not (stringp (symbol-function symbol)))
  44        (not (vectorp (symbol-function symbol)))
  45        (error "Function %s is already defined and not a keyboard macro."
  46               symbol))
  47   (fset symbol last-kbd-macro))
  48
  49 ;;;###autoload
  50 (defun insert-kbd-macro (macroname &optional keys)
  51   "Insert in buffer the definition of kbd macro NAME, as Lisp code.
  52 Optional second arg KEYS means also record the keys it is on
  53 \(this is the prefix argument, when calling interactively).
  54
  55 This Lisp code will, when executed, define the kbd macro with the same
  56 definition it has now.  If you say to record the keys, the Lisp code
  57 will also rebind those keys to the macro.  Only global key bindings
  58 are recorded since executing this Lisp code always makes global
  59 bindings.
  60
  61 To save a kbd macro, visit a file of Lisp code such as your `~/.emacs',
  62 use this command, and then save the file."
  63   (interactive "CInsert kbd macro (name): \nP")
  64   (let (definition)
  65     (if (string= (symbol-name macroname) "")
  66         (progn
  67           (setq macroname 'last-kbd-macro definition last-kbd-macro)
  68           (insert "(setq "))
  69       (setq definition (symbol-function macroname))
  70       (insert "(fset '"))
  71     (prin1 macroname (current-buffer))
  72     (insert "\n   ")
  73     (if (stringp definition)
  74         (let ((beg (point)) end)
  75           (prin1 definition (current-buffer))
  76           (setq end (point-marker))
  77           (goto-char beg)
  78           (while (< (point) end)
  79             (let ((char (following-char)))
  80               (cond ((= char 0)
  81                      (delete-region (point) (1+ (point)))
  82                      (insert "\\C-@"))
  83                     ((< char 27)
  84                      (delete-region (point) (1+ (point)))
  85                      (insert "\\C-" (+ 96 char)))
  86                     ((= char ?\C-\\)
  87                      (delete-region (point) (1+ (point)))
  88                      (insert "\\C-\\\\"))
  89                     ((< char 32)
  90                      (delete-region (point) (1+ (point)))
  91                      (insert "\\C-" (+ 64 char)))
  92                     ((< char 127)
  93                      (forward-char 1))
  94                     ((= char 127)
  95                      (delete-region (point) (1+ (point)))
  96                      (insert "\\C-?"))
  97                     ((= char 128)
  98                      (delete-region (point) (1+ (point)))
  99                      (insert "\\M-\\C-@"))
 100                     ((= char (aref "\M-\C-\\" 0))
 101                      (delete-region (point) (1+ (point)))
 102                      (insert "\\M-\\C-\\\\"))
 103                     ((< char 155)
 104                      (delete-region (point) (1+ (point)))
 105                      (insert "\\M-\\C-" (- char 32)))
 106                     ((< char 160)
 107                      (delete-region (point) (1+ (point)))
 108                      (insert "\\M-\\C-" (- char 64)))
 109                     ((= char (aref "\M-\\" 0))
 110                      (delete-region (point) (1+ (point)))
 111                      (insert "\\M-\\\\"))
 112                     ((< char 255)
 113                      (delete-region (point) (1+ (point)))
 114                      (insert "\\M-" (- char 128)))
 115                     ((= char 255)
 116                      (delete-region (point) (1+ (point)))
 117                      (insert "\\M-\\C-?"))))))
 118       (if (vectorp definition)
 119           (let ((len (length definition)) (i 0) char)
 120             (while (< i len)
 121               (insert (if (zerop i) ?\[ ?\ ))
 122               (setq char (aref definition i)
 123                     i (1+ i))
 124               (cond ((not (and (wholenump char) (< char 256)))
 125                      (prin1 char (current-buffer)))
 126                     ((= char 0)
 127                      (insert "?\\C-@"))
 128                     ((< char 27)
 129                      (insert "?\\C-" (+ 96 char)))
 130                     ((= char ?\C-\\)
 131                      (insert "?\\C-\\\\"))
 132                     ((< char 32)
 133                      (insert "?\\C-" (+ 64 char)))
 134                     ((< char 127)
 135                      (insert ?? char))
 136                     ((= char 127)
 137                      (insert "?\\C-?"))
 138                     ((= char 128)
 139                      (insert "?\\M-\\C-@"))
 140                     ((= char (aref "\M-\C-\\" 0))
 141                      (insert "?\\M-\\C-\\\\"))
 142                     ((< char 155)
 143                      (insert "?\\M-\\C-" (- char 32)))
 144                     ((< char 160)
 145                      (insert "?\\M-\\C-" (- char 64)))
 146                     ((= char (aref "\M-\\" 0))
 147                      (insert "?\\M-\\\\"))
 148                     ((< char 255)
 149                      (insert "?\\M-" (- char 128)))
 150                     ((= char 255)
 151                      (insert "?\\M-\\C-?"))))
 152             (insert ?\]))
 153         (prin1 definition (current-buffer))))
 154     (insert ")\n")
 155     (if keys
 156         (let ((keys (where-is-internal macroname '(keymap))))
 157           (while keys
 158             (insert "(global-set-key ")
 159             (prin1 (car keys) (current-buffer))
 160             (insert " '")
 161             (prin1 macroname (current-buffer))
 162             (insert ")\n")
 163             (setq keys (cdr keys)))))))
 164
 165 ;;;###autoload
 166 (defun kbd-macro-query (flag)
 167   "Query user during kbd macro execution.
 168   With prefix argument, enters recursive edit, reading keyboard
 169 commands even within a kbd macro.  You can give different commands
 170 each time the macro executes.
 171   Without prefix argument, asks whether to continue running the macro.
 172 Your options are: \\<query-replace-map>
 173 \\[act] Finish this iteration normally and continue with the next.
 174 \\[skip]        Skip the rest of this iteration, and start the next.
 175 \\[exit]        Stop the macro entirely right now.
 176 \\[recenter]    Redisplay the screen, then ask again.
 177 \\[edit]        Enter recursive edit; ask again when you exit from that."
 178   (interactive "P")
 179   (or executing-macro
 180       defining-kbd-macro
 181       (error "Not defining or executing kbd macro"))
 182   (if flag
 183       (let (executing-macro defining-kbd-macro)
 184         (recursive-edit))
 185     (if (not executing-macro)
 186         nil
 187       (let ((loop t)
 188             (msg (substitute-command-keys
 189                   "Proceed with macro?\\<query-replace-map>\
 190  (\\[act], \\[skip], \\[exit], \\[recenter], \\[edit]) ")))
 191         (while loop
 192           (let ((key (let ((executing-macro nil)
 193                            (defining-kbd-macro nil))
 194                        (message msg)
 195                        (read-event)))
 196                 def)
 197             (setq key (vector key))
 198             (setq def (lookup-key query-replace-map key))
 199             (cond ((eq def 'act)
 200                    (setq loop nil))
 201                   ((eq def 'skip)
 202                    (setq loop nil)
 203                    (setq executing-macro ""))
 204                   ((eq def 'exit)
 205                    (setq loop nil)
 206                    (setq executing-macro t))
 207                   ((eq def 'recenter)
 208                    (recenter nil))
 209                   ((eq def 'edit)
 210                    (let (executing-macro defining-kbd-macro)
 211                      (recursive-edit)))
 212                   ((eq def 'quit)
 213                    (setq quit-flag t))
 214                   (t
 215                    (or (eq def 'help)
 216                        (ding))
 217                    (with-output-to-temp-buffer "*Help*"
 218                      (princ
 219                       (substitute-command-keys
 220                        "Specify how to proceed with keyboard macro execution.
 221 Possibilities: \\<query-replace-map>
 222 \\[act] Finish this iteration normally and continue with the next.
 223 \\[skip]        Skip the rest of this iteration, and start the next.
 224 \\[exit]        Stop the macro entirely right now.
 225 \\[recenter]    Redisplay the screen, then ask again.
 226 \\[edit]        Enter recursive edit; ask again when you exit from that."))
 227                      (save-excursion
 228                        (set-buffer standard-output)
 229                        (help-mode)))))))))))
 230
 231 ;;;###autoload
 232 (defun apply-macro-to-region-lines (top bottom &optional macro)
 233   "For each complete line between point and mark, move to the beginning
 234 of the line, and run the last keyboard macro.
 235
 236 When called from lisp, this function takes two arguments TOP and
 237 BOTTOM, describing the current region.  TOP must be before BOTTOM.
 238 The optional third argument MACRO specifies a keyboard macro to
 239 execute.
 240
 241 This is useful for quoting or unquoting included text, adding and
 242 removing comments, or producing tables where the entries are regular.
 243
 244 For example, in Usenet articles, sections of text quoted from another
 245 author are indented, or have each line start with `>'.  To quote a
 246 section of text, define a keyboard macro which inserts `>', put point
 247 and mark at opposite ends of the quoted section, and use
 248 `\\[apply-macro-to-region-lines]' to mark the entire section.
 249
 250 Suppose you wanted to build a keyword table in C where each entry
 251 looked like this:
 252
 253     { \"foo\", foo_data, foo_function },
 254     { \"bar\", bar_data, bar_function },
 255     { \"baz\", baz_data, baz_function },
 256
 257 You could enter the names in this format:
 258
 259     foo
 260     bar
 261     baz
 262
 263 and write a macro to massage a word into a table entry:
 264
 265     \\C-x (
 266        \\M-d { \"\\C-y\", \\C-y_data, \\C-y_function },
 267     \\C-x )
 268
 269 and then select the region of un-tablified names and use
 270 `\\[apply-macro-to-region-lines]' to build the table from the names.
 271 "
 272   (interactive "r")
 273   (or macro
 274       (progn
 275         (if (null last-kbd-macro)
 276             (error "No keyboard macro has been defined."))
 277         (setq macro last-kbd-macro)))
 278   (save-excursion
 279     (let ((end-marker (progn
 280                         (goto-char bottom)
 281                         (beginning-of-line)
 282                         (point-marker)))
 283           next-line-marker)
 284       (goto-char top)
 285       (if (not (bolp))
 286           (forward-line 1))
 287       (setq next-line-marker (point-marker))
 288       (while (< next-line-marker end-marker)
 289         (goto-char next-line-marker)
 290         (save-excursion
 291           (forward-line 1)
 292           (set-marker next-line-marker (point)))
 293         (save-excursion
 294           (execute-kbd-macro (or macro last-kbd-macro))))
 295       (set-marker end-marker nil)
 296       (set-marker next-line-marker nil))))
 297
 298 ;;;###autoload (define-key ctl-x-map "q" 'kbd-macro-query)
 299
 300 ;;; macros.el ends here