GNU bug report logs - #20626
Wishlist: M-x shell-command-on-rectangle-region

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Message #26 received at 20626 <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> linkov.net>
To: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
Cc: 20626 <at> debbugs.gnu.org, asparagus <at> comcast.net
Subject: Re: bug#20626: Wishlist: M-x shell-command-on-rectangle-region
Date: Thu, 25 Jun 2015 01:27:18 +0300

>> in ‘shell-command-on-region’ to check for a rectangular region and
>> insert the output accordingly, so I see no way to avoid checking for
>> ‘rectangle-mark-mode’ in ‘shell-command-on-region’.
>
> In any case checking specifically for a rectangular region is wrong.
> Having a "fast-path" for the case of a simple contiguous region is fine,
> but the "slow&complex" path is not just for rectangular regions:
> the code should also work with a region made up of various
> arbitrary chunks (there's currently no package that provides this
> feature, but that's no excuse).

Then what about adding a new arg REGION to ‘shell-command-on-region’
and other region-sensitive commands that will provide the region
configuration including information about region type and region shape,
e.g. a list in the form ‘(rectangle …)’.  Then the command's body
will check the car of the arg REGION and act accordingly depending
on the region shape.

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