- This is implemented as a post-processing pass.
- Might require additional checks to verify rewriteability.
- Implemented as a pair-wise tag DOM minimization strategy,
i.e. it takes tag pairs (B, I) for ex, and attempts to
normalize the tree just for those tag pairs. Normalizing
across multiple tags is implemented as pairwise rewriting
across all pairs: Ex:(b,i), (b,u),(i,u) for (b,i,u)
- Copied over attributes as part of rewriting, but some of the
attributes lose their meaning on rewriting since tags are
reordered (ex: sourcePosn, sourceTagPosn). How do we handle this?
Output examples and possible issues to fix:
<i><b><u>biu</u></b></i><b><u>bu</u></b><u>u</u>
gets rewritten to:
<u><b><i>biu</i>bu</b>u</u>
But, the equivalent wikitext form:
'''''<u>biu</u>''''''''<u>bu</u>'''<u>u</u>
does not get rewritten because of parsing differences.
This wikitext gets parsed into:
<i><b><u>biu</u>'''</b></i><u>bu<b>u</b></u>
The extra ''' token in the middle thwarts DOM rewriting.
However, a slightly different version:
"'''''<u>biu</u>''<u>bu</u>'''<u>u</u>"
gets properly normalized to:
<u>'''''biu''bu'''u</u>
An alternative, but fun strategy to play with is to use the following
two normalization primitives: S(wap) and M(erge).
- S rewrites T1(T2(x)) into T2(T1(x))
(ex: <b><i>foo</i></b> ==> <i><b>foo</b></i>)
- M rewrites (T(x),T(y)) into (T(x,y)).
(ex: <b>foo</b><b>bar</b> ==> <b>foobar</b>)
The current rewriting strategy could possibly be re-implemented as S-M
rewriting. The problem to solve there would be to find an efficient
rewriting strategy that is guaranteed to lead to a normal form. I may
not play with it now, but just documenting it for later (to play with
in my spare time).
This commit is just as a record of fun/experimental code where I get to
learn details of JS, wikitext, parsing, and DOM manipulation. Next
version of this code will attempt to introduce minimal DOM restructuring
across multiple tags at once which can be more efficient.
gwicke: Removed now passing test from whitelist, and updated another whitelist
entry which is now improved.
Change-Id: Ie97bcb164eb62c34ba61aa76ba2f4c232aa713d8
This makes it possible to transclude list items from a template.
Note: "5 quotes" test is broken by this patch, it appears that ListHandler
newline processing is changing some state which mysteriously affects the
QuoteTransformer. This is ominous, hopefully there's a simple explanation...
gwicke: fix a bug in tokenizer triggered by definition lists like this:
**; foo : bar
Change-Id: I4e3a86596fe9bffcbfc4bf22895362c3bf742bad
* Ignore safesubst for now
* Remove an unneeded whitelist entry
* Make sure the caption is not lost for thumbs (fix to last commit) and remove
debug print
Change-Id: I243584ed0838cf7c3b4110fe9cdf869272477312
The HTML5 parser we are using to normalize expected HTML output in parserTests
reverses the order of attributes (see
https://github.com/aredridel/html5/pull/53 for the fix). Remove whitelist
entries concerned with this and use the proper order in external image
attributes.
Change-Id: If1868cae05396a150757c85a20473ab756cbcd97
Instead of a proliferation of data-mw-* attributes, it should be easier to
stash all private / non-semantic round-trip information in a JSON object
stored in data-mw.
Change-Id: Id200a6a8789fa152f29ea530e5a24b6ee7b4b285
construction' part of the HTML5 spec:
http://www.whatwg.org/specs/web-apps/current-work/multipage/urls.html#url-manipulation-and-creation
Removed a few whitelisted test cases that are now passing directly.
The encoding canonicalization could also be moved to the Sanitizer. Doing this
early in token stream processing however has the advantage of providing further
transformations uniform data to work with. We could even consider to move this
even further into the tokenizer.
possible to support template / template argument expansion in image options,
and causes little trouble for wikilinks. Non-image wikilinks with multiple
text pipes are quite rare in the dumps, and concatenating description tokens
with a plain '|' is quite easy. 261 parser tests passing.
are now merged with specific registrations by rank. Not yet clear if that is a
good idea overall, need to check use cases when implementing template expansion
and other functionality.
183 parser test now passing.
tests now passing.
Link trails depend on language-dependent positive character classes in the PHP
parser. These classes all seem to disallow punctuation implicitly and list
differing plain text characters instead, so it might be possible to get away
with identifying a common class of non-trail punctuation instead. This would
help to keep the tokenizer independent of configurations, which is very
desirable for caching and simplified external parsing.
start / row / table end). The old productions are not deleted yet to make it
easy to compare the output on more complex articles. 181 tests passing after
adding two table tests with whitespace-only differences to the whitelist.
token stream. This is the first token transformation exercising the
TokenTransformer class as its dispatcher. Template expansions, wiki link
formatting, tag sanitation and extensions should be able to use the same
dispatcher by registering for specific token types.
The parser performance is very slightly improved as the token stream is only
traversed once.
