[wp-trac] [WordPress Trac] #24977: Workflow change: automate RTL css generation

[WordPress Trac]

#24977: Workflow change: automate RTL css generation
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 Reporter:  yoavf           |       Owner:
     Type:  task (blessed)  |      Status:  new
 Priority:  normal          |   Milestone:  3.7
Component:  General         |     Version:
 Severity:  normal          |  Resolution:
 Keywords:                  |
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Comment (by y0natan):

 Just FYI: automatic flipping of background-positions with unit lengths
 '''is''' possible in modern browsers (Chrome, FF, IE9+), with four-value
 position syntax.

 I have a fork of the python cssjanus which does just that at
 https://github.com/yonatan/rtl-toolkit

 It turns

 {{{background: url(image.jpg) 12px top;}}}

 into

 {{{background: url(image-rtlx.jpg) 12px top;background-position:right 12px
 top 0%;}}}

 The first background declaration swaps the image with a horizontally
 flipped version and leaves in the original position for IE8, which
 requires some javascript after page load to measure and reposition
 background images. The background-position that follows does the right
 thing in modern browsers.

 Unfortunately it doesn't support a lot of CSS3 properties, and CSSJanus'
 regexp-centric approach makes it a little difficult to maintain and
 improve.

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Ticket URL: <http://core.trac.wordpress.org/ticket/24977#comment:31>
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