Multi-column layouts and line heights

Multi-column layouts and line heights

[Lars Ingebrigtsen]

Take a look at the layout here:

http://lars.ingebrigtsen.no/2015/02/09/eww-not-can-haz-different-line-pitch/

Is there any way to work around that problem?  I would guess not, but
I've been wrong about lots of things before.  :-)

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

Re: Multi-column layouts and line heights

[Stefan Monnier]

> Take a look at the layout here:
> http://lars.ingebrigtsen.no/2015/02/09/eww-not-can-haz-different-line-pitch/
> Is there any way to work around that problem?  I would guess not, but
> I've been wrong about lots of things before.  :-)

Yes, that's one other problem among yet more (e.g. selecting text in
a column won't behave as the user expects).

I don't see how this can be fixed without deep changes in the redisplay.


        Stefan

Re: Multi-column layouts and line heights

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Mon, 09 Feb 2015 20:21:10 +1100
> 
> Take a look at the layout here:
> 
> http://lars.ingebrigtsen.no/2015/02/09/eww-not-can-haz-different-line-pitch/

Took me a while and several readings of your comment to even notice
the problem.

> Is there any way to work around that problem?  I would guess not, but
> I've been wrong about lots of things before.  :-)

Yes, it's a fundamental limitation of the current display engine: each
screen line (a.k.a. "glyph row") goes all the way from the left edge
of the window to its right edge.  The height of each screen line is
determined by the height of the largest glyph on that line.

In a nutshell, the display engine lays out each window on a
rectangular canvas (known as a "glyph matrix").

Again, I don't think the problem is so grave.  You will have the same
problem if some of the lines use unusual characters displayed with
other fonts.  There's nothing new here that Emacs users aren't seeing
already.

Re: Multi-column layouts and line heights

[Lars Ingebrigtsen]

Stefan Monnier <monnier@IRO.UMontreal.CA> writes:

> Yes, that's one other problem among yet more (e.g. selecting text in
> a column won't behave as the user expects).

When using fixed-width text aligned by spaces, you could (sort of) work
around this by using `C-x r k'.  shr has now switched to using display
specs with :align-to, and that makes `C-x r k' not work very well.

I don't know whether that's a bug in `C-x r k', though...

One additional detail when using variable-width HTML rendering in
email -- if you're responding to something that's been filled as
variable-width, then that filling in the quoted text will look really
bad as fixed-width.

Perhaps Message should respond to HTML mail as HTML.  :-)

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

Re: Multi-column layouts and line heights

[Rasmus]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Perhaps Message should respond to HTML mail as HTML.  :-)

The Times They Are a-Changin'.

Better html support would be nice, e.g. when sending emails with pictures.

—Rasmus

-- 
. . . It begins of course with The Internet.  A Net of Peers

Re: Multi-column layouts and line heights

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Tue, 10 Feb 2015 15:52:31 +1100
> Cc: emacs-devel@gnu.org
> 
> Stefan Monnier <monnier@IRO.UMontreal.CA> writes:
> 
> > Yes, that's one other problem among yet more (e.g. selecting text in
> > a column won't behave as the user expects).
> 
> When using fixed-width text aligned by spaces, you could (sort of) work
> around this by using `C-x r k'.  shr has now switched to using display
> specs with :align-to, and that makes `C-x r k' not work very well.
> 
> I don't know whether that's a bug in `C-x r k', though...

I think it's a bug in "C-x r k", yes: it uses current-column instead
of something like posn-at-point.