Difference between revisions of "Keyboard macros"

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Enfin, nous conclurons le festival avec une épreuve réservée aux amateurs qui s'annonce comme toujours, très explosive ! Notre deuxième course de la réunion III, le Prix de Noirmoutier, nous promet énormément de spectacle.  ÿþ<> Profitant de cela, Roc Meslois, alors au top en cette fin de saison estivale, ne faisait qu'une bouchée de ses rivaux et signait une première victoire de groupe I bien méritée. Les 16 jets au niveau des jambes et des fessiers sont loin d'être désagréables. 
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{{Manual|emacs|Basic-Keyboard-Macro|Basic Keyboard Macro}}
  
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Le Grand auditorium, où seront montrés les films de la sélection officielle pour la Palme d'or, est fin prêt, doté d'un écran flambant neuf et de nouvelles enceintes de son spécialement conçues pour le lieu. A la place des jeunes filles qui sourient.  ÿþ<> En bas de nos bureaux, une boutique ne vend que des piles. 
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'''Keyboard macros''' can be used to automate or repeat tedious editing tasks in Emacs.
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La hausse du dollar et celle des co ts de production li s la maind'Suvre, au p trole et au transport font peser une pression significative sur nos marges brutes, a pr cis Don Blair, directeur financier. Erreur ! Tout comme sa copine d'outreAtlantique, elle prévoit des  dancing shoes , une paire de ballerines pour danser jusqu'au bout de la nuit. At Concordia manufacturing professor once taught "machines depreciate people appreciate, invest in people". Je viens de suivre l'émission C dans l'air, animée par Thierry Guerrier sur la 5, consacrée au malheureux évènement de Duisbourg; d'éminents spécialistes s'y exprimèrent sur la question des foules et de la maîtrise de leurs mouvements. ÿþ<> New York est une ville plus crue et vivante dans l'oeuvre originale, quand la série télé en offre une vision glamourisée mais subtile.. Quenza du Creuzil (8) a un profil très attirant.  
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==Basic Use==
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L'une faisant les curs de l'autre sur "Les poèmes de Michelle", pour le jury, elles se complètent parfaitement bien. Marc Tarabella: Hélas, si seulement il y a avait eu négociations. ÿþ<> (Sacilège !) Pour la plupart, Dave sera toujours mal noté parce qu'il fait du Dave, ou qu'il a osé toucher à la grande artiste qu'est Lady Gaga, mais il faut reconnaître une chose : il chante bien, et sa voix est parfaitement maitrisée.  
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; {{Keys|F3}}, or {{Keys|C-x (}}
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On n'est d'ailleurs pas toutes égales face aux talons. 30 décembre 2004. C'est donc Israël qui doit éliminer le terrorisme dans la Bande de Gaza pour changer radicalement la donne politicomilitaire de la région.  ÿþ<> Votre mari aura le sentiment d'avoir atteint un havre de repos et d'ordre et cela vous rendra également heureuse. Après, il est difficile de vous orienter vers un modèle de jean sur le simple postulat "grosses fesses". J'imagine mal me forcer à montrer mes jambes, ça me complexerait trop.
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: Start defining a macro.
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; {{Keys|F4}}, or {{Keys|C-x )}}
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: Stop defining a macro.
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; {{Keys|F4}}, or {{Keys|C-x e}}
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: 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
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==Example usage==
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Consider the standard <code>*scratch*</code> buffer:
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<pre>
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;; This buffer is for notes you don't want to save, and for Lisp evaluation.
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;; If you want to create a file, visit that file with C-x C-f,
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;; then enter the text in that file's own buffer.
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</pre>
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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.
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# 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".
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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>
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==Saving macros==
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{{Manual|emacs|Save-Keyboard-Macro|Save Keyboard Macro}}
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===Binding to a key===
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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]
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[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

Revision as of 14:23, 20 October 2013

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.

Saving macros

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

Binding to a key

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

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