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Re: [matrix][cssom-view] DOMPoint, DOMPointLiteral definitions

From: Robert O'Callahan <robert@ocallahan.org>
Date: Sat, 28 Sep 2013 22:53:14 +1200
Message-ID: <CAOp6jLbpLC5eSHxmkJ7xvPpyX2_DtkFbFC6L-xZG9rZFTwKqJQ@mail.gmail.com>
To: Dirk Schulze <dschulze@adobe.com>
Cc: Simon Pieters <simonp@opera.com>, www-style <www-style@w3.org>, Boris Zbarsky <bzbarsky@mit.edu>, "public-script-coord@w3.org" <public-script-coord@w3.org>
On Sat, Sep 28, 2013 at 5:31 PM, Dirk Schulze <dschulze@adobe.com> wrote:

> You could also just introduce DOMRectImmutable and DOMRectMutable and a
>
> typedef (DOMRectMutable or DOMRectImmutable) DOMRect;
>

That's probably more work than what I proposed. Also, DOMQuad.bounds can't
be this kind of DOMRect; the rect returned by DOMQuad.bounds is not
immutable (it can be changed by modifying the points of DOMQuad), but it's
also not a DOMRectMutable (since Web authors can't be allowed to set its
members). So this approach is inadequate.

To be honest I still wish we could avoid duplicating every interface. So
> far we have DOMPoint, DOMRect, DOMQuad, DOMMatrix and ever single interface
> needs to have a mutable and immutable interface. Each new proposed
> interface will always actually introduce two. I wish we could move more of
> magic into WebIDL. Sounds like we can't for this kind of magic.
>

We only need to introduce mutable vs not mutable versions of interfaces
where there are clear needs. Right now we only have a clear need in the
case of DOMRect.

Rob
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Received on Saturday, 28 September 2013 10:53:52 UTC

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