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Re: Extending CSSOM Views matchMedium with callback Re: CSS WG comments on View Modes Media Feature spec

From: Marcos Caceres <marcosc@opera.com>
Date: Mon, 12 Apr 2010 22:12:13 +0200
Message-Id: <C8136861-DA0C-4A73-B600-B188C1989FF7@opera.com>
To: Simon Fraser <smfr@me.com>
Cc: Daniel Glazman <daniel.glazman@disruptive-innovations.com>, "public-webapps@w3.org" <public-webapps@w3.org>, "www-style@w3.org" <www-style@w3.org>, Robin Berjon <robin@berjon.com>, Anne van Kesteren <annevk@opera.com>, Arthur Barstow <art.barstow@nokia.com>


On Apr 12, 2010, at 8:50 PM, Simon Fraser <smfr@me.com> wrote:

>
> On Apr 12, 2010, at 2:25 AM, Marcos Caceres wrote:
>
>> On Fri, Mar 26, 2010 at 2:25 PM, Marcos Caceres <marcosc@opera.com>  
>> wrote:
>>> On Thu, Mar 18, 2010 at 4:02 PM, Simon Fraser <smfr@me.com> wrote:
>>>> On Mar 18, 2010, at 6:44 AM, Marcos Caceres wrote:
>>>>
>>>>>> 4. all these queries could/should have an event-based  
>>>>>> counterpart so the
>>>>>>  changes are detectable by code. We understand this is outside  
>>>>>> of the
>>>>>>  scope of this spec but that's still an important comment.
>>>>>
>>>>> We have a proposal already for the CSS WG to review:
>>>>> http://dev.w3.org/2006/waf/widgets-vm/vm-interfaces.src.html
>>>>
>>>> It seems like this needs to align to the current CSS OM View spec:
>>>> <http://dev.w3.org/csswg/cssom-view/>
>>>>
>>>> which has a StyleMedia interface available on the window object  
>>>> as 'styleMedia', rather than 'media'.
>>>>
>>>> I would expect to see events related to media type changes in the  
>>>> CSS OM View spec too, rather than in a widgets-related spec.
>>>
>>> I totally agree, there is much overlap. We should start looking at  
>>> how
>>> to merge the two specs (or our requirements) into the CSS OM View
>>> spec. I would be happy for the widgets one to vanish if the CSS OM
>>> View spec would handled our use cases.
>>>
>>> Perhaps we should have a joint teleconf or something to arrange  
>>> how to
>>> proceed...  I'll leave that up to the chairs, however.
>>
>> To make Widget View Modes Interfaces [1] redundant, we would like to
>> propose extending CSSOM Views' matchMedium method to have a callback
>> as a second argument.
>>
>> This would address the following sections of [1] in the following  
>> ways:
>>
>> # 3.2. Media Type Changed Event Types
>> styleMedia.matchMedium("screen", function() { alert("no
>> longer screen!") })
>>
>> # 3.3. View Mode Changed Event Types
>> styleMedia.matchMedium("(viewmodesyntax)", ... )
>>
>> # 3.4. Resolution Changed Event Types
>> styleMedia.matchMedium("(resolution:300dpi)", ... )
>>
>> # 3.5. Orientation Changed Event Types
>> styleMedia.matchMedium("(orientation:landscape)", ... )
>>
>> The proposal has it's origins on the Mozilla bug list (see comment
>> from David Baron):
>> https://bugzilla.mozilla.org/show_bug.cgi?id=542058#c3
>
> This is overlapping with ViewModeChanged events:
> <http://dev.w3.org/2006/waf/widgets-vm/vm-interfaces.src.html#viewmodechangedeventtypes 
> >
>
> Do we really need both?
>

No, we don't need both. To be clear, we want to kill off  vm- 
interfaces.src.html in favor of CSSOM Views (as we have shown that it  
does more or less what we need).

Kind regards,
Marcos 
Received on Monday, 12 April 2010 20:13:23 GMT

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