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bug#19661: wrapping before window-width (new wrap-column text property?)
From: |
Ivan Shmakov |
Subject: |
bug#19661: wrapping before window-width (new wrap-column text property?) |
Date: |
Fri, 23 Jan 2015 13:17:08 +0000 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
Package: emacs
Severity: wishlist
[As suggested in news:jwviogtdei4.fsf-monnier+emacs@gnu.org,
news:87387w8r2j.fsf@violet.siamics.net, etc.; parts of the
second message are reiterated below.]
Please provide support for window-width-independent wrapping in
the Emacs display engine; possibly by the means of a new
wrap-column text property (and still perhaps complemented by a
eponymous buffer-local variable), treated similarly to the likes
of wrap-prefix.
This feature could be used to display format=flowed (RFC 3676)
MIME parts, as well as enriched-mode documents, documents using
MediaWiki markup, SHR-rendered HTML documents, and pretty much
any other kind of text which allows for /both/ wrappable and
preformatted parts at the same time.
It is already possible to influence the wrap width somewhat by
setting the margin width variables (right-margin-width,
left-margin-width) appropriately (see bug#4172, for instance.)
The suggested wrap-column text property should probably have no
effect on the window marginal areas, however.
I admit that I know very little of the current Emacs display
implementation. However, it seems to me that wrap-column makes
us one property closer to native multicolumn display (which’d
warrant a separate wishlist bug report, though.)
Consider, e. g.:
This is an example sentence with wrap-column set to 23.
This is yet another example sentence with line-prefix and wrap-prefix
both set to (space :align-to 25), – or something like that.
From there, we may display it as follows:
This is an example
sentence with
wrap-column set to 23.
This is yet another example sentence with line-prefix
and wrap-prefix both set to (space :align-to 25), –
or something like that.
Yet, provided that some other property is switched on, the Emacs
display engine may decide to show it like this instead:
This is an example This is yet another example sentence with line-prefix
sentence with and wrap-prefix both set to (space :align-to 25), –
wrap-column set to 23. or something like that.
As already imagined in the preceding discussion, forward- and
backward-char commands would then still follow the logical order
of text in the buffer (that is: the “23” sentence, then the “25”
one), while left-char, etc. would follow the visual order
(assuming visual-order-cursor-movement.)
--
FSF associate member #7257 np. Mi memoras — Kajto … 3013 B6A0 230E 334A
- bug#19661: wrapping before window-width (new wrap-column text property?),
Ivan Shmakov <=
- bug#19661: wrapping before window-width (new wrap-column text property?), Eli Zaretskii, 2015/01/23
- bug#19661: wrapping before window-width (new wrap-column text property?), martin rudalics, 2015/01/23
- bug#19661: wrapping before window-width (new wrap-column text property?), Eli Zaretskii, 2015/01/23
- bug#19661: wrapping before window-width (new wrap-column text property?), martin rudalics, 2015/01/24
- bug#19661: wrapping before window-width (new wrap-column text property?), Eli Zaretskii, 2015/01/24
- bug#19661: wrapping before window-width (new wrap-column text property?), martin rudalics, 2015/01/25
- bug#19661: wrapping before window-width (new wrap-column text property?), Eli Zaretskii, 2015/01/25
- bug#19661: wrapping before window-width (new wrap-column text property?), martin rudalics, 2015/01/25