This merely ports over Ica3fb110ce and Id5e50c2baf to the CM6
stream parser. Also port the test that was added in I7907b4743b
Bug: T292967
Bug: T348019
Follow-Up: Ica3fb110cebb5650f66be321b533ed030e2c9698
Change-Id: I54b1624131ea63f403ebc1f6f900556ca868b7f4
This is more or less a exact port of the old stream parser, with the big
notable change being that all configuration-related code lives in a
separate class, CodeMirrorModeMediaWikiConfig. A smaller change is that
closing HTML tags that are marked as errors now have the ending '>'
character highlighted red, when it didn't before.
Integration with other extensions and modes is saved for a future patch
(T348684). This means <nowiki>, <ref> and other extension-supplied
markup is not yet highlighted.
The entry point for WikiEditor integration is now at
ext.CodeMirror.v6.WikiEditor.init.js, which needs to first require the
virtual file set via the DataScript (PHP) class. This can't be
integrated into the CM6 code because it needs to be precompiled before
ResourceLoader can use it (T281781).
Known issues, to be addressed separately:
* No support for TagModes / PluginModes (T348684)
* Identical adjacent tokens produce excess markup (T352917)
* Section headings do not have line-level styling (T351686)
Bug: T348019
Change-Id: I8f8a81f362bed60dea14ecde9487a2b0c89225e8