The extension is custom built for MediaWiki (i.e. handling of extension
tags like <ref> that aren't HTML tags), so it only makes sense to bundle
it as part of the MediaWiki language mode.
Resultantly, we can no longer check the direction of the textarea where
we enable bidi isolation, because the language mode should have no
knowledge of the textarea. Instead we offer a `config` object (akin to
other language modes offered by CodeMirror), with currently only one
option: `bidiIsolation`. It is the responsibility of the caller to
enable this where desired.
Also make templateFolding and CodeMirrorModeMediaWiki use
`export default` since they both only export one thing.
This commit is in preparation for Ide716247e5, where we need bidi
isolation separated from the CodeMirror class due to its dependency on
CodeMirrorModeMediaConfig.
Bug: T358804
Bug: T214989
Change-Id: If3211bd259bd7833919a627faabd86ae7aa81b53
HTML tags and similar markup may appear jumbled on RTL pages due to the
standard algorithm used for character placement. With this patch, we
detect all tags (HTML or MediaWiki-supplied) and wrap them with
<span class=cm-bidi-isolate>. This CSS class forces the content to be
LTR, making the tags easier to work with on RTL pages.
Bug: T358804
Change-Id: I1338afeefa16102d5cc8fd6c8a236c144e5cf81f
