checkout layout branch

git checkout -b layout origin/layout

Seb

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On Jan 16, 2009, at 11:23 AM, Richard Quadling wrote:

>
> 2009/1/16 Andrew Dupont <goo...@andrewdupont.net>:
>>
>> I've just committed a couple large API additions in a "layout" branch
>> in our Git repository:
>>
>> http://github.com/sstephenson/prototype/tree/layout
>> http://github.com/sstephenson/prototype/blob/9d28f04d98307f652a2d85ff35e869f2e0ac7f38/src/dom/layout.js
>>
>> It's still very preliminary, but Element.Layout is meant to like a
>> lazy-loading, memoized subclass of Hash. It gives measurements and
>> offsets of practically any aspect an element's layout box. It's lazy-
>> loading because some of these computations are costly and shouldn't  
>> be
>> done unless strictly necessary.
>>
>> In other words, I can do something like this...
>>
>> var foo = $('foo');
>> var layout = foo.getLayout();
>>
>> var width = layout.get('width'); // 144 (or some other number)
>> var marginBoxWidth = layout.get('margin-box-width'); // 164  
>> (content +
>> padding + border + margin)
>>
>> Behind the scenes, it determined the "width" (i.e., the content box
>> width) by taking the offsetWidth property from the element (which is
>> the width of the element's "border box") and subtracting the computed
>> padding and border widths on both sides. When it did this, it cached
>> the values for many other measurements, like "border-box-width,"
>> "padding-left," "padding-right," and so on. If any of these values  
>> are
>> requested directly, no further computation is necessary.
>>
>> Furthermore, when we ask for the "margin-box-width" (i.e., the space
>> the element truly commands), it knows it needs to fetch "margin-left"
>> and "margin-right," but the values of all other properties are  
>> already
>> cached.
>>
>> (A caveat: because of the caching, an Element.Layout object should be
>> treated like a "snapshot" of an element's dimensions. When the
>> dimensions of an object change, you ought to grab a new instance of
>> Element.Layout.)
>>
>> Take a look at the code and tell me what you think. The API is far
>> from complete, naturally, but it'd be great to know if people think
>> this is the right idea.
>>
>> Cheers,
>> Andrew
>>>
>>
>
> Assuming I've used ...
>
> git clone git://github.com/sstephenson/prototype.git
>
> why do I not get the layout.js file?
>
> And I've done this in a clean folder.
>
> -- 
> -----
> Richard Quadling
> Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731
> "Standing on the shoulders of some very clever giants!"
>
> >


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