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Request for new terminfo capability (DECCARA extended)

From: Kovid Goyal
Subject: Request for new terminfo capability (DECCARA extended)
Date: Wed, 7 Feb 2018 08:23:48 +0530
User-agent: Mutt/1.9.3 (2018-01-21)


In light of the various problems with background color erase, as
documented here: 
I'd like to propose a new boolean capability for terminfo named (something like)

If set, the terminal emulator should implement the extended DECCARA
escape code, as described here:
and the original DECCARA from the VT 510:
This allows applications to set any SGR attribute in an arbitrary
region of the screen, by sending a simple CSI code that starts with the
region co-ordinates followed by the SGR code(s) to set. 

Ideally, there would be some way to specify a parametrized capability to
express this, but (and I may be mistaken here) I dont think terminfo has
the ability to encode this, without resorting to a separate capability
for each SGR code. A boolean capability means that ncurses using
applications cannot use it directly, however, for non ncurses using
applications (such as full screen editors) this is very useful.


Dr. Kovid Goyal 

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