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From: Kaushal Modi <kaushal.modi@gmail.com>
To: Joost Kremers <joostkremers@fastmail.fm>
Cc: help-gnu-emacs@gnu.org
Subject: Re: Is it possible to move a column where column on right is variable width
Date: Tue, 16 May 2017 19:32:33 +0000	[thread overview]
Message-ID: <CAFyQvY3qjF5kWg36+-RAO2mXXU2sPxF37SJGyCUDPwjQyMt4MQ@mail.gmail.com> (raw)
In-Reply-To: <87lgpwliqa.fsf@fastmail.fm>

On Tue, May 16, 2017 at 3:11 PM Joost Kremers <joostkremers@fastmail.fm>
wrote:

> > As the Description portion of the data is not of equal width,
> > using
> > rectanges gets tricky.
>
> Unless you do the totally uncool thing of adding enough spaces to
> the final line so that you can create a rectangle of the
> appropriate size. It'll cost you some geek points, but it gets the
> job done. ;-)
>

I had ended up doing a "thesis" on that topic a while back. The resultant
solution adds the right number of spaces temporarily to get the widest
required rectangle without modifying the buffer :)

https://github.com/kaushalmodi/.emacs.d/blob/df25c8cd0d84ec2af647e92db2c0c19e3097d035/setup-files/setup-editing.el#L507-L630

The main logic is inside modi/extend-rectangle--core, but then I apply it
to different function to "do the right thing".

From the doc-string of modi/advice-select-rectangle-to-end in that code:

  "Extract the rectangle so that the longest line of region is completely
included when the prefix \\[universal-argument] is used.

In the below example, ▯ is the mark and ▮ is the point.

  a =▯12345;
  b = 6;▮

If that region is selected and if we do \\[copy-rectangle-as-kill], the
following
rectangle gets copied:

  12
  6;

.. which was not the intention.

But with this advice, \\[universal-argument] \\[copy-rectangle-as-kill] on
that
same region will copy the below rectangle:

  12345;
  6;

.. which obviously was the actual intention.

Similar rectangle extension behavior is applied when using the
prefix \\[universal-argument] with similarly advised functions too."

-- 

Kaushal Modi


  parent reply	other threads:[~2017-05-16 19:32 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-16 16:34 Is it possible to move a column where column on right is variable width Angus Comber
2017-05-16 17:38 ` Kaushal Modi
2017-05-16 19:11   ` Joost Kremers
2017-05-16 19:23     ` Emanuel Berg
2017-05-16 19:32     ` Kaushal Modi [this message]
2017-05-16 18:51 ` Tomas Nordin
2017-05-16 19:14   ` Emanuel Berg
2017-05-16 21:56   ` Tomas Nordin
2017-05-17  1:17 ` Skip Montanaro
2017-05-17  2:05 ` Ben Bacarisse
2017-05-17  6:22 ` Loris Bennett
2017-05-18  6:17 ` hector

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