[wp-trac] [WordPress Trac] #26669: wp-admin.css should be broken up into modules

[WordPress Trac]

#26669: wp-admin.css should be broken up into modules
----------------------------+---------------------
 Reporter:  jorbin          |       Owner:  helen
     Type:  enhancement     |      Status:  closed
 Priority:  normal          |   Milestone:  3.9
Component:  Administration  |     Version:
 Severity:  normal          |  Resolution:  fixed
 Keywords:  has-patch       |     Focuses:  ui
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Changes (by helen):

 * milestone:  Awaiting Review => 3.9


Comment:

 A few things here:

 1. Do not attempt to load the changeset in Trac or link to it directly. At
 last count, the number of altered lines was 213,216, due to using `svn cp`
 to create each of the new CSS files with history.
 2. `wp-admin.css` uses `@import` for each of the
 modules/components/whatever we call them, cssjanus creates RTL versions of
 each, and `wp-admin-rtl.css` is created, calling the generated RTL files.
 3. The hit of multiple HTTP requests only applies with `SCRIPT_DEBUG` on -
 `clean-css` (via `cssmin`) inlines `@import`ed files in the minified
 versions.
 4. This approach works out well for us because it does not involve script
 loader changes, it utilizes existing tooling, `core.svn` and `develop.svn`
 can continue to both be used for patches, and web inspectors handle CSS
 `@import`s already - no need to worry about whether or not source maps are
 supported yet.

 Please open new tickets for any issues discovered, as it may not be clear
 whether it is a consequence of this split or the preceding colors.css
 merge in #18380.

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Ticket URL: <https://core.trac.wordpress.org/ticket/26669#comment:18>
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