W3C home > Mailing lists > Public > www-style@w3.org > August 2009

Re: Gradient syntax proposal

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Fri, 14 Aug 2009 15:55:03 -0500
Message-ID: <dd0fbad0908141355l505e9f91j1989fcb62072d566@mail.gmail.com>
To: fantasai <fantasai.lists@inkedblade.net>
Cc: www-style@w3.org
On Fri, Aug 14, 2009 at 3:47 PM, fantasai<fantasai.lists@inkedblade.net> wrote:
> Brad Kemper wrote:
>> On Aug 13, 2009, at 4:35 PM, Tab Atkins Jr. wrote:
>>> Just linear gradients for now:
>>> http://www.xanthir.com/document/document.php?id=d65df9d10442ef96c2dfe5e1d7bbebf7aa42f2bcf24e68fc3777c4b484fa8a4ce55fed2189cac20ccad8686127f4c08917c4ca8b7614e9f89c2a950ec083a9c6
>>> ~TJ
>> I won't get into my objections to [inner | outer] right now, but about the
>> rest of this:
> We could make the default 'outer', which should address your concerns, no?
> I'd use the keywords 'inside' and 'outside', btw. I think they fit better,
> and also they're already in the parsing system (for list-style-position).

I have no problem with either of these suggestions.

>> One of the things I really hate about using "<bg-position>, <bg-position>"
>> is that comma to separate the two lengths or keywords on the left from those
>> on the right. Since commas are already being used to separate color-stops,
>> this just makes the whole thing harder to read, because they are no longer
>> used consistently to group like things. When they are used only for
>> color-stops, then you can see in a glance how many color-stops there are
>> instead of having to study it more closely with a line full of distances and
>> commas. For instance, I find the following very hard to read, and it
>> probably doesn't even make sense (which is another problem with this kind of
>> construction).
>> |linear-gradient(10px 30%, 100% 4%, 50% green, 20% blue)|
> I completely agree. How about using a keyword?
>  linear-gradient(10px 30% to 100% 4%, green, blue 20%, navy);
> For simpler cases you'd get
>  linear-gradient(left to right, green, blue, navy);

I like the "to" keyword for the <bg-position> construction!  It
expresses the relationship very nicely.  Using it on the simpler
construction is nice and literate, but sort of unnecessary; I think
"linear-gradient(left, green, blue, navy)" is pretty clear?

> We could also use some other punctuation instead of that first comma, e.g.
>  linear-gradient(10px 30% to 100% 4% / green, blue 20%, navy);
>  linear-gradient(left to right / green, blue, navy);
> But it's not really necessary. The comma could even be dropped if we
> forbid the first percentage.
>  /* This is ok and parseable */
>  linear-gradient(left to right green, 50% blue, 100% navy);
>  /* Invalid b/c ambiguous with 'right 0%' position syntax*/
>  linear-gradient(left to right 0% green, 50% blue, 100% navy);

Gah, I still really hate dropping the first comma.  Separating the
direction from the color-stops with a slash looks nice, though.  I
think I like it!

Imma go edit my draft real quick.

Received on Friday, 14 August 2009 20:56:05 UTC

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