Re: [webkit-dev] The SrcN responsive images proposal

2013-10-20 Thread PERIER Romain
Hi all,
srcset is not complicated enough for a web developer?  why do you want to
add complexity for the developer ? The srcset specification already convers
DRP switching and viewport (not implemented yet, but it is planned, it is
in my todo list)

why don't you propose improvements to the original
specification/implementation instead of  reinventing the wheel ?
Syntaxically-speaking, it's not smart.

I agree with Maciej.

Regards,
Romain




2013/10/20 Maciej Stachowiak m...@apple.com

 My initial impression is that it seems a bit overengineered.

  - Maciej

 On Oct 19, 2013, at 4:39 PM, Yoav Weiss y...@yoav.ws wrote:

 Hello WebKiteers,

 I'd like to get the project's opinion on a recent responsive image
 proposal by Tab Atkins dubbed srcN:
 http://tabatkins.github.io/specs/respimg/Overview.html

 This proposal covers all the major responsive images use-cases: DPR based
 resource selection, viewport dimensions based resource selection and
 art-direction.
 It does so while avoiding previous implementor concerns regarding the
 picture element and its complexity, and while providing better authoring
 tools for viewport based resource selection than previous proposals.

 The srcN proposal does come to replace the srcset DPR switching syntax
 which recently landed in WebKit (an effort I was a part of). OTOH, srcN's
 x-based URL syntax replicates srcset's DPR syntax, so I believe large parts
 of that code can be reused in srcN's implementation.

 Will the project welcome patches implementing the srcN proposal? (Possibly
 behind a flag)

 Thanks,
 Yoav

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Re: [webkit-dev] The SrcN responsive images proposal

2013-10-20 Thread Yoav Weiss
On Oct 20, 2013 11:31 AM, PERIER Romain romain.per...@gmail.com wrote:

 Hi all,
 srcset is not complicated enough for a web developer?  why do you want to
add complexity for the developer ? The srcset specification already convers
DRP switching and viewport

The reasoning behind the new proposal was detailed by John Melloer at
http://www.w3.org/community/respimg/2013/10/14/reasoning-behind-srcn-replacing-srcset-and-picture/

In short, srcset's viewport syntax doesn't cover the art-direction use-case
and doesn't really cover the viewport based resource selection use case
either.
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Re: [webkit-dev] The SrcN responsive images proposal

2013-10-20 Thread Romain Perier

Le 20 oct. 2013 à 14:39, Yoav Weiss y...@yoav.ws a écrit :

 On Oct 20, 2013 11:31 AM, PERIER Romain romain.per...@gmail.com wrote:
 
  Hi all,
  srcset is not complicated enough for a web developer?  why do you want to 
  add complexity for the developer ? The srcset specification already convers 
  DRP switching and viewport
 
 In short, srcset's viewport syntax doesn't cover the art-direction use-case 
 and doesn't really cover the viewport based resource selection use case 
 either.
 
So, it is a good enough reason to rewrite everything from scratch without even 
trying to propose an improvement to the specification ? As far I know the spec 
and the implementation are still work in progress, so…

Regards,
Romain

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Re: [webkit-dev] The SrcN responsive images proposal

2013-10-20 Thread Antti Koivisto
Ignoring other aspects of this, the idea of making attribute name an
enumeration is somewhat distasteful. It will require ugly special parsing.
The platform has plenty of attribute values that are lists already.


  antti


On Sun, Oct 20, 2013 at 4:00 AM, Maciej Stachowiak m...@apple.com wrote:

 My initial impression is that it seems a bit overengineered.

  - Maciej

 On Oct 19, 2013, at 4:39 PM, Yoav Weiss y...@yoav.ws wrote:

 Hello WebKiteers,

 I'd like to get the project's opinion on a recent responsive image
 proposal by Tab Atkins dubbed srcN:
 http://tabatkins.github.io/specs/respimg/Overview.html

 This proposal covers all the major responsive images use-cases: DPR based
 resource selection, viewport dimensions based resource selection and
 art-direction.
 It does so while avoiding previous implementor concerns regarding the
 picture element and its complexity, and while providing better authoring
 tools for viewport based resource selection than previous proposals.

 The srcN proposal does come to replace the srcset DPR switching syntax
 which recently landed in WebKit (an effort I was a part of). OTOH, srcN's
 x-based URL syntax replicates srcset's DPR syntax, so I believe large parts
 of that code can be reused in srcN's implementation.

 Will the project welcome patches implementing the srcN proposal? (Possibly
 behind a flag)

 Thanks,
 Yoav

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Re: [webkit-dev] The SrcN responsive images proposal

2013-10-20 Thread Benjamin Poulain
On 10/20/13, 9:07 AM, Antti Koivisto wrote:
 Ignoring other aspects of this, the idea of making attribute name an
 enumeration is somewhat distasteful. It will require ugly special
 parsing. The platform has plenty of attribute values that are lists already.

I was thinking the same thing last night. In addition to weirdness on
the engine side, it looks like a nightmare for authoring/tooling.

Is there a precedent for this strange notation?

Benjamin
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Re: [webkit-dev] The SrcN responsive images proposal

2013-10-20 Thread Antti Koivisto
On Sun, Oct 20, 2013 at 11:08 PM, Benjamin Poulain benja...@webkit.orgwrote:

 On 10/20/13, 9:07 AM, Antti Koivisto wrote:
  Ignoring other aspects of this, the idea of making attribute name an
  enumeration is somewhat distasteful. It will require ugly special
  parsing. The platform has plenty of attribute values that are lists
 already.

 I was thinking the same thing last night. In addition to weirdness on
 the engine side, it looks like a nightmare for authoring/tooling.


 Is there a precedent for this strange notation?


Also CSS selectors only support matching exact attribute names. There is no
way to write universal elements with some srcN attribute query for
example. This might not be important for practical uses here but it does
demonstrate that the approach is a poor fit to the platform.


  antti


 Benjamin
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