[OpenLayers-Dev] Closure Compiler for OpenLayers 3.x

[Tim Schaub]

On 12/3/10 2:22 AM, Bart van den Eijnden (OSGIS) wrote:
> Hi,
>
> I would be supportive of making these changes for OpenLayers 3.0.
>
> Thanks a lot for writing up this excellent explanation.
>

Agreed!

Tim

> Best regards,
> Bart
>
>> Hello Peter,
>>
>> I have seen your ticket. OpenLayers 2.x can be compiled only with
>> SIMPLE OPTIMIZATION. Then the Closure Compiler is just another
>> minimizer, slightly better then JSMIN. No big deal, beside 20% smaller
>> file size for existing build process. ;-)
>>
>> What I am suggesting with the blog post is to write the code of
>> OpenLayers 3.x in a way to allow ADVANCED_OPTIMIZATION of of the code.
>>
>> This would bring:
>>
>> - Much better code optimization - resulting in even smaller file size.
>> - Documentation with JSDoc Tags is validated and meaningful - code is
>> under better control
>> - Possibility to strip all unused parts of the OpenLayers library when
>> it is compiled together with the final application. No need to choose
>> in advance what functionality I want in the building profiles.
>> Dependencies are solved by the compiler automatically.
>> - Possibility to compile OpenLayers only for particular use - Mobile
>> WebKit browser, Quirks vs Standards mode, etc.
>> - Debugging with FireBug even for the compiled version of the source code.
>> - Generation of dynamically loadable modules, to speed up loading of
>> the library.
>>
>> Details are in the blog post, including tips on how to do that - based
>> on our practical experience with Google Closure Compiler from another
>> projects. I can write also examples to demonstrate the described
>> features.
>>
>> The question for community is mostly:
>>
>> - Are we willing to follow the JavaScript Style Guide, which is
>> necessary for the advanced compilation: http://bit.ly/9lETMA
>> - Do we want to write the correct JSDoc tags according to:
>> http://bit.ly/3UNSlI
>>
>> These are the decisions for OpenLayers 3.0, which should be done
>> before the one week active coding session is going to happen. BTW I am
>> keen to participate if it's going to be in Europe.
>>
>> Regards,
>>
>> Klokan Petr Pridal
>>
>> 2010/12/2 Peter Robins<openlayers at peterrobins.co.uk>:
>>> I set up a ticket on this subject a couple of weeks ago, as it didn't
>>> seem to me to be limited to any particular version of OL and there's
>>> no reason why people can't start using it for their builds
>>> straightaway (though not mentioned in the ticket, I am also using GCC
>>> for my proj4js builds, with similar results)
>>> http://trac.osgeo.org/openlayers/ticket/2900
>>> Some further comments at http://trac.osgeo.org/openlayers/ticket/2925
>>>
>>> 2010/12/2 Klokan Petr Přidal<klokan at klokan.cz>:
>>>> Dear OpenLayers developers,
>>>>
>>>> I wrote a blog post which is summarizing what can the open-sourced
>>>> Google Closure Compiler do for OpenLayers 3.0, how it can be done and
>>>> what are the implications.
>>>> Let's discuss this subject with the community. I am keen to get a
>>>> feedback and know what people think about that.
>>>>
>>>> Please read the blog post:
>>>>
>>>> http://blog.klokantech.com/2010/12/closure-compiler-for-openlayers-3x.html
>>>>
>>>> And send comments...
>>>>
>>>> Regards,
>>>>
>>>> Klokan Petr Pridal
>>>>
>>>> P.S.
>>>> I promised Tim Schaub at FOSS4G in Barcelona to publish such a post,
>>>> but it took me a bit longer then I expected...
>>>> --
>>>> http://blog.klokantech.com/
>>>> http://www.mapranksearch.com/
>>>> http://www.maptiler.org/
>>>> http://www.oldmapsonline.org/
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>>
>> --
>> http://blog.klokantech.com/
>> http://www.mapranksearch.com/
>> http://www.maptiler.org/
>> http://www.oldmapsonline.org/
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-- 
Tim Schaub
OpenGeo - http://opengeo.org
Expert service straight from the developers.