Re: [gnus git] branch master updated: =1= shr.el (shr-tag-div): Added.

[Ted Zlatanov <tzz@lifelogs.com>]

On Sat, 30 Oct 2010 01:18:50 +0200 Lars Magne Ingebrigtsen <larsi@gnus.org> wrote: 

LMI> Ted Zlatanov <tzz@lifelogs.com> writes:
>> Parsing CSS is not hard.

LMI> Well, yes and no.  Parsing <p style=".."> is easy, but getting a
LMI> machinery in place to handle <p class=".."> and inheritance and stuff is
LMI> a bit of work, I think.

There's also external and inline stylesheets.  Let's say I parse those
out and get the inheritance right, can you go from there?

>> Here's the appearance properties list that IMO would make sense in Emacs:
>> 
>> border
>> background-color
>> color

LMI> color is problematic in the Gwene groups, at least, since the RSS feeds
LMI> don't specify a default background colour.

Ah, but the article's original CSS spec probably does :)

>> text-decoration
>> text-transform
>> line-height

LMI> Hm.  line-height would be awkward to implement, wouldn't it?

Dunno.  It's not really necessary, but the other two are pretty trivial.

text-transform can be uppercase, lowercase, or capitalize (default is
none).

text-decoration can be underline, overline, line-through, or blink
(default is also none).

>> font-family
>> font-style
>> font-size
>> font-weight

LMI> Emacs' support for mixing fonts in the same buffer is so weak that I
LMI> think this is best left unimplemented.  I mean -- you can do it, but it
LMI> usually looks awfully awful since mixing fonts of different widths makes
LMI> all line breaking totally haphazard. 

At least font-style could be useful (it can be normal, oblique, italic,
or inherit).  font-weight specifies bold (it can be bold, bolder,
lighter, normal, or a number between 100 and 900 where 400 is normal and
800 is bold).  So that's possible I think.

>> list-style
>> list-style-type
>> list-style-image
>> list-style-position

LMI> And these I don't even know what is.  :-)

http://www.w3schools.com/css/css_list.asp

Pretty simple stuff.  It just replaces the default list item indicator
with something else.  Definitely needed is the armenian list-style-type :)

>> For DIV vs SPAN, if "display" is "block" then the element should be
>> rendered by itself.  And DIV elements have display:block by default in
>> all user agents.  Also at a minimum "visibility:none" should be honored.

LMI> I've been using shr on my Nokia e72 a bit, and the most annoying thing
LMI> is actually the ALT texts on images.  Most give no information of note,
LMI> but just clutter up the text...

OK.  But display:block and visibility:none are the basic stuff needed to
render HTML semi-properly.  And you can put it on your resume.

Ted