This fixes a careless error introduced in I1338afeefa where we don't do
a strict equality test and thus if the tag is the first element (at
position 0), the following bracket is also treated as the start
position. Here we simply do a strict equality test against null (the
reset value), and viola, several issues are fixed.
Bug: T358804
Change-Id: I86021d363ecc33a7551bc887439dc1902914026f
See https://w.wiki/9Twh for example usage with ResourceLoader.
Webpack is retired in favor of Rollup, which allows us to convert the
ECMAScript Modules into CommonJS modules for use by ResourceLoader.
We now have a file in dist/ for each RL module that we want to offer,
including the 'lib' module which includes the CM library itself.
Because Rollup has no knowledge of the ResourceLoader module registry,
the generated output requires other modules via relative path, when it
needs to be the RL module name. To get around this, we do a crude
find/replace after the files are generated. Hacky, but necessary to make
CodeMirror usable by gadgets and scripts that don't also want
WikiEditor.
Add new RL modules 'ext.CodeMirror.v6.lib' (vendor code) and
'ext.CodeMirror.v6' (the main CodeMirror class, sans WikiEditor).
Clean up extension.json, listing the v6 modules beneath the old ones.
Bug: T214989
Change-Id: Ide716247e545cf2bdd977bea645729564ebbe6e2
