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* How should a clone of the `grep` program highlight matches for Emacs?
@ 2015-06-21 14:32 Raffaele Ricciardi
  2015-06-27 15:22 ` Michael Heerdegen
  2015-06-29 15:58 ` Raffaele Ricciardi
  0 siblings, 2 replies; 3+ messages in thread
From: Raffaele Ricciardi @ 2015-06-21 14:32 UTC (permalink / raw)
  To: help-gnu-emacs

I am writing an Emacs script as a replacement for the `grep` program 
while executing the `rgrep` command.  Now, I can't make my Emacs script 
highlight the matches in a way that Emacs understands.

After having read the Emacs Lisp file that defines the `rgrep` command 
-- which I am using for my tests -- I guess that the script should 
surround matches with Select Graphic Rendition sequences; and it is 
doing so, like this:

     (princ "\x1b[31m") ; 31 means "red", as hard-coded in `grep.el`
     (princ (match-string-no-properties 0))
     (princ "\x1b[0m"))

These sequences do cause a terminal to highlight the matches, but not 
Emacs (of course, Emacs does highlight matches from `grep`).

What should the script do instead?  Thank you.


^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: How should a clone of the `grep` program highlight matches for Emacs?
  2015-06-21 14:32 How should a clone of the `grep` program highlight matches for Emacs? Raffaele Ricciardi
@ 2015-06-27 15:22 ` Michael Heerdegen
  2015-06-29 15:58 ` Raffaele Ricciardi
  1 sibling, 0 replies; 3+ messages in thread
From: Michael Heerdegen @ 2015-06-27 15:22 UTC (permalink / raw)
  To: Raffaele Ricciardi; +Cc: help-gnu-emacs

Raffaele Ricciardi <rfflrccrd@gmail.com> writes:

> I am writing an Emacs script as a replacement for the `grep` program
> while executing the `rgrep` command.  Now, I can't make my Emacs
> script highlight the matches in a way that Emacs understands.

Do you want to use this script from M-x grep?  I assume "yes".

AFAICT grep.el highlights matches via a grep-mode defined as kind of a
compilation-mode.  The way of highlighting is defined in
`grep-regexp-alist'.  Other things are highlighted via font-lock
keywords.  Of course be sure to bind grep-highlight-matches non-nil.
But in general, grep-mode should be able to highlight as you want it.

My first guess is that might be help to set grep-highlight-matches to
always -- note that this option has a :set custom specification!

If that doesn't help, please show us some code!


Regards,

Michael.



^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: How should a clone of the `grep` program highlight matches for Emacs?
  2015-06-21 14:32 How should a clone of the `grep` program highlight matches for Emacs? Raffaele Ricciardi
  2015-06-27 15:22 ` Michael Heerdegen
@ 2015-06-29 15:58 ` Raffaele Ricciardi
  1 sibling, 0 replies; 3+ messages in thread
From: Raffaele Ricciardi @ 2015-06-29 15:58 UTC (permalink / raw)
  To: help-gnu-emacs

On 21/06/15 16:32, Raffaele Ricciardi wrote:
>      (princ "\x1b[31m") ; 31 means "red", as hard-coded in `grep.el`
>      (princ (match-string-no-properties 0))
>      (princ "\x1b[0m"))

This works:

     (princ "\x1b[01;31m")
     (princ (match-string-no-properties 0))
     (princ "\x1b[m")



^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2015-06-29 15:58 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2015-06-21 14:32 How should a clone of the `grep` program highlight matches for Emacs? Raffaele Ricciardi
2015-06-27 15:22 ` Michael Heerdegen
2015-06-29 15:58 ` Raffaele Ricciardi

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