Native Range objects are automatically updated when the DOM elements
they refer to are affected (e.g. detached from the DOM, or their offset
changes because of siblings being added/removed).
This seemed harmless or maybe even slightly useful, but it turns out
it conflicts with VisualEditor, which has to wrap the entire page in a
new DOM node when it opens (and unwrap it when it closes), effectively
temporarily detaching it from the DOM, which destroys all our ranges.
Just use a plain object that stores the same data as a Range. And when
we need to use Range's API, we can simply construct a temporary one.
Bug: T241861
Change-Id: Iee64aa3d667877265ef8a59293c202e6478d7fb6
The loop in parser.js assumed that there was always a heading before
any comments (not counting the page title, only section headings).
Bug: T243869
Change-Id: I3a0bb06716e75d4a17e25c40748673a071ee5f30
We removed it in c40c112514 when we added
a more practical use for the parser, but I keep wishing I had it to
experiment with the parser code.
Now it's off by default and can be used by adding &dtdebug=1 to the URL.
Change-Id: I6a92bfe7f55af0949b391606b04c3cfa0f996f2a
