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bug#8952: Allow narrowing to be window specific

From: Juri Linkov
Subject: bug#8952: Allow narrowing to be window specific
Date: Sun, 18 Jul 2021 00:30:15 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (x86_64-pc-linux-gnu)

>> Wish list:
>> (1) Narrowing being a per-window operation, not per-buffer (currently,
>> narrowing in one window affects all windows viewing same buffer).
> The other things in this bug report have already been covered,
> apparently, which leaves this wishlist item.
> I don't think it's feasible to implement this, though.  The narrowing is
> intimately tied to the buffer object internally, and I think undoing
> that coupling would be very problematic.  As I think there can't be any
> progress on this, I'm closing this bug report.

Anyone can write a package (if not already) that puts window-local
overlays with the 'invisible' property, thus emulating 'narrow'.

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