Allow to add the stylesheets version in TinyMCE (or any other param)

[GregLone]

As a front-end developer, it's really a pain in the *$* to not be able to add a version parameter to my stylesheets URL in TinyMCE: the modifications won't show up because of the cache.
So far, I had a workaround by filtering 'mce_css'. But with the new iframes used for the self-hosted videos/audios in WP 4.0, I can't use this filter there (BTW, are you sure to keep those awful iframes? :s). Even worse, some iframes don't use the stylesheets (tweets for example).

[wonderboymusic]

Without the iframes, compatibility is gross: https://core.trac.wordpress.org/ticket/28905#comment:6

[GregLone]

Replying to wonderboymusic:

Without the iframes, compatibility is gross: https://core.trac.wordpress.org/ticket/28905#comment:6

OK, if those iframes improve the compatibility, I won't complain anymore :) (well, maybe a little sometimes =D). Looking at your test results, it's impressive, congrats.

[GregLone]

On second though, file_exists can mess with other things: if you use cache busting for example.
Perhaps a filter is a better solution.
See the attached diff file.

[GregLone]

Renamed filter, add a new one, better comment blocks.

[GregLone]

OK, I found a way to use parameters.
Instead of:

add_editor_style( 'res/css/editor-style.css?v=1234' );

Simply do:

add_editor_style( get_stylesheet_directory_uri() . '/res/css/editor-style.css?v=1234' );

This way, WordPress won't try any file_exists().
Simple and stupid :|

[GregLone]

Should we close this ticket as invalid?