Difference between revisions of "Keyboard macros"

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Dermed kontaktet Fiat det italienske Carabinieri. - Stemte du sj sp Kurt med et  mulberry vesker br />- Det er der alle  timberland sko barn  hans har g ja! «Dette gir Hafslund en samlet gevinst pÃ¥ om lag 4,2 mrd kroner per dags dato, hvorav om lag 3,8 mrd kroner er realisert,» skriver Onsager i en e-post til E24.
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{{Manual|emacs|Basic-Keyboard-Macro|Basic Keyboard Macro}}
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Tvilsomt grunnlagMen er sammenhengen mellom klima og konflikt sÃ¥ Ã¥penbar, sÃ¥ direkte? - Mange med meg synes at Homsepatruljen er befriende. Plattformen er designet for en lengre arbeidsøkt enn 15 Ã¥r, og produksjonsfasilitetene, bÃ¥de topside og jacket er fortsatt i  parajumpers norge  god stand, skriver Statoil.
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- Fornærmede har senere innrømmet at dette var feil, og at hun etter episoden i suite 2806 gikk videre til et rom i nærheten og vasket det, før hun igjen vendte tilbake til suite 2806. Det har bidratt til Ã¥ New York-børsen h  ar steget nesten kontinuerlig siden 2009 selv om økonomien har vært i krise. januar 1933, til utbruddet av den annen  parajumper skrig i 1939 - ja, like til Auschwitz.
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'''Keyboard macros''' can be used to automate or repeat tedious editing tasks in Emacs.
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Da slipper han å snakke om alt det andre. «Skåla Rett Opp» i Loen har en stigning på 22,2 prosent, en lengde på 8,2 kilometer, og målgang hele 1848 meter over fjorden. Det tar en stund å komme over, sier han.
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ta mer hensyn overfor UtSelv gjort i den beste hensikt, bør pressen vite at de må gå forsiktig fram når de dekker Utøya-tragedien. Dalley on Seaga and the JLP ---------------------------2. Nordre KurdistanDet strengeste klima i Kurdistan, og også det mest tilbakestående området økonomisk.
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==Basic Use==
 +
 
 +
; {{Keys|F3}}, or {{Keys|C-x (}}
 +
: Start defining a macro.
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; {{Keys|F4}}, or {{Keys|C-x )}}
 +
: Stop defining a macro.
 +
; {{Keys|F4}}, or {{Keys|C-x e}}
 +
: Execute a macro
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; {{Keys|C-u 37 C-x e}} or {{Keys|C-u 37 F4}}
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: Execute a macro multiple times, using [[prefix argument]]
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; {{Keys|C-u 0 C-x e}}
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: Execute a macro until the end of the buffer
 +
 
 +
==Example usage==
 +
 
 +
Consider the standard <code>*scratch*</code> buffer:
 +
 
 +
<pre>
 +
;; This buffer is for notes you don't want to save, and for Lisp evaluation.
 +
;; If you want to create a file, visit that file with C-x C-f,
 +
;; then enter the text in that file's own buffer.
 +
</pre>
 +
 
 +
Suppose you want to remove the first occurrence of the letter "a" on every row in that piece of text. You could write a [[regular expression]] to do the job, but let's assume you want to use a keyboard macro this time.
 +
 
 +
# Make sure [[point]] is at the start of the buffer.
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# Hit <code>C-x (</code> to start recording your macro. '''Note:''' If you hit <code>C-g</code> or if an error occurs, your keyboard macro recording will stop.
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# Hit <code>C-s</code> followed by <code>a</code> to find the first "a". Now, point is right after the first "a" in the text.
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# Hit backspace to delete that "a".
 +
 
 +
The first occurrence of "a" of the first line has been deleted. Let's move point to the beginning of the next line and then stop recording.
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 +
<ol start="5">
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<li>Hit <code>C-e C-f</code> to move point to the beginning of the next line.</li>
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<li>Hit <code>C-x )</code> to finish the recording of our macro.</li>
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</ol>
 +
 
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The macro you have just recorded performs the operation of removing the first occurrence of "a" it can find and then moving point to the next line.
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 +
<ol start="7">
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<li>Hit <code>C-x e</code> once to call that macro.</li>
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<li>Continue hitting <code>e</code> to call it several times. Hit any other key to get out of the macro repetition.</li>
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</ol>
 +
 
 +
== Naming and saving macros ==
 +
 
 +
You can:
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* give a name to the most recently defined macro (<code>C-x C-k n</code>)
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* bind it to a key sequence (<code>C-x C-k b</code>)
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* insert it in the current buffer as lisp code (<code>M-x insert-kbd-macro</code>).
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{{Manual|emacs|Save-Keyboard-Macro|Save Keyboard Macro}}
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To bind a keyboard macro to a key use <code>C-x C-k b</code>.  To avoid problems caused by overriding existing bindings, the key sequences <code>C-x C-k 0</code> through <code>C-x C-k 9</code> and <code>C-x C-k A</code> through <code>C-x C-k Z</code> are reserved for your own keyboard macro bindings.  You can, however, bind a keyboard macro to whatever you like.
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 +
==Variables==
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Variables can be stored in lisp or in [[registers]].  Here's an example using lisp:
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 +
<pre>
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[M-: (setq x 1)]
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<F3>
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Line number [C-u M-: x]
 +
[M-: (setq x (+ x 1))]
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<F4>
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</pre>
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 +
Now execute the macro four times with the command <code>C-x e e e e</code> and you get:
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 +
line number 1<br />
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line number 2<br />
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line number 3<br />
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line number 4
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 +
 
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= See also =
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* [https://github.com/Silex/elmacro elmacro], to show keyboard macros as emacs-lisp
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* [https://github.com/abo-abo/centimacro centimacro] to (temporarily) bind any number of macros to any global shortcuts.
 +
* You can use keyboard macros à la vim in [[evil]].
 +
 
 +
 
 +
[[Category:Intermediate]]
 +
[[Category:Editing]]

Revision as of 04:52, 19 May 2015

Basic Keyboard Macro (`(info "(emacs) Basic Keyboard Macro")')

Keyboard macros can be used to automate or repeat tedious editing tasks in Emacs.


Basic Use

[F3], or [C-x (]
Start defining a macro.
[F4], or [C-x )]
Stop defining a macro.
[F4], or [C-x e]
Execute a macro
[C-u 37 C-x e] or [C-u 37 F4]
Execute a macro multiple times, using prefix argument
[C-u 0 C-x e]
Execute a macro until the end of the buffer

Example usage

Consider the standard *scratch* buffer: 

;; This buffer is for notes you don't want to save, and for Lisp evaluation.
;; If you want to create a file, visit that file with C-x C-f,
;; then enter the text in that file's own buffer.

Suppose you want to remove the first occurrence of the letter "a" on every row in that piece of text. You could write a regular expression to do the job, but let's assume you want to use a keyboard macro this time.

  1. Make sure point is at the start of the buffer.
  2. Hit C-x ( to start recording your macro. Note: If you hit C-g or if an error occurs, your keyboard macro recording will stop.
  3. Hit C-s followed by a to find the first "a". Now, point is right after the first "a" in the text.
  4. Hit backspace to delete that "a".

The first occurrence of "a" of the first line has been deleted. Let's move point to the beginning of the next line and then stop recording.

  1. Hit C-e C-f to move point to the beginning of the next line.
  2. Hit C-x ) to finish the recording of our macro.

The macro you have just recorded performs the operation of removing the first occurrence of "a" it can find and then moving point to the next line.

  1. Hit C-x e once to call that macro.
  2. Continue hitting e to call it several times. Hit any other key to get out of the macro repetition.

Naming and saving macros

You can:

  • give a name to the most recently defined macro (C-x C-k n)
  • bind it to a key sequence (C-x C-k b)
  • insert it in the current buffer as lisp code (M-x insert-kbd-macro).

Save Keyboard Macro (`(info "(emacs) Save Keyboard Macro")')


To bind a keyboard macro to a key use C-x C-k b. To avoid problems caused by overriding existing bindings, the key sequences C-x C-k 0 through C-x C-k 9 and C-x C-k A through C-x C-k Z are reserved for your own keyboard macro bindings. You can, however, bind a keyboard macro to whatever you like.

Variables

Variables can be stored in lisp or in registers. Here's an example using lisp: 

[M-: (setq x 1)]
<F3>
Line number [C-u M-: x]
[M-: (setq x (+ x 1))]
<F4>

Now execute the macro four times with the command C-x e e e e and you get:

line number 1
line number 2
line number 3
line number 4


See also

  • elmacro, to show keyboard macros as emacs-lisp
  • centimacro to (temporarily) bind any number of macros to any global shortcuts.
  • You can use keyboard macros à la vim in evil.
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