tinyMCE script looks for a /simple theme that does not exist

[helgatheviking]

wp-includes/js/tinymce/tiny_mce.js seems to reference a "simple" theme that does not exist in the wp-includes/js/tinymce/themes folder

i noticed this when trying to apply tinyMCE to some textareas in metaboxes. normally i copy the tinyMCE.settings object but I made an error that had my script execute before that object was defined and I got the following error:

​http://localhost/multi/wp-includes/js/tinymce/wp-tinymce.php?c=1&ver=348-20056 line 2

Failed to load: ​http://localhost/multi/wp-includes/js/tinymce/themes/simple/editor_template.js

[azaozz]

If TinyMCE is trying to load the "simple" theme that means it's not initialized properly. Yes, by default it includes a simple theme however that has never been used in WordPress as it doesn't allow any customizations, plugins, etc. (also the buttons are at the bottom which makes it quite confusing for the users).

[needle]

I've come across the same reference to the non-existent file when using wp_editor() in a theme to provide TinyMCE for the comment textarea. Perhaps the following might help untangle what happens in cases like this.

It took me a while to understand what was going on, because two identical installs exhibited different behaviours; ie, one loaded TinyMCE correctly, the other failed and referenced the non-existent file wp-includes/js/tinymce/themes/simple/editor_template.js.

It turned out that wp_default_editor() (called from line 555 of class-wp-editor.php) was returning the "currently active" editor in the post edit screen. In one install, my user had selected the HTML tab to edit a post, and therefore TinyMCE never loaded for the wp_editor() instance in the comment textarea. Nor was there a fallback because I had set 'quicktags' => false.

So, if you've set 'quicktags' => false in your wp_editor() settings for your metabox and you've got HTML as your currently active editor for the post, you might well see TinyMCE fail to load. My solution was to use the wp_default_editor filter to return 'tinymce' for my instance.

Hope that helps.

[jethin]

This was a very annoying and difficult to troubleshoot bug. Needle's description fit my case exactly and his/her solution worked well for me. (Thanks Needle!) The complete filter call I used to reset the editor mode was:

add_filter('wp_default_editor', create_function('', 'return "tinymce";'));

[SergeyBiryukov]

FWIW, I don't see a reference to the "simple" theme in TinyMCE 3.5.6 (updated in [21545]).

[needle]

Replying to SergeyBiryukov:

FWIW, I don't see a reference to the "simple" theme in TinyMCE 3.5.6 (updated in [21545]).

Running everything under SVN latest (without the filter) confirms your observation here. The TinyMCE editor is now loading with a default theme instead of throwing the above error (when the HTML editor is selected in the post edit screen). It's not as pretty, though, so the filter's usefulness stands.

Thanks for the heads-up on this.