Parsoid/status

Last update on: 2012-09-17

2011-02-09
A dedicated project was created for Parsoid. Status updates prior to this date were included in the Visual editor updates.

2012-08-20 (MW 1.20wmf10)
The Parsoid team worked on the final tasks in the JS prototype, in preparation for the C++ port. The port will allow an efficient integration with PHP and Lua, improve performance and allow the parallelization of the parser in the longer term in preparation for production use.

An important milestone we reached is the implementation and verification of the template DOM range encapsulation algorithm, which now identifies all template-affected parts of the DOM for round-tripping and protection in the VisualEditor. We are currently implementing template round-tripping based on this. Other new features include oldid support so that previous versions of pages can be edited, rather than just the current one, and more complete error reporting in the web service. Wikitext escaping in the serializer is much improved, and now also handles interactions across multiple DOM nodes. An ongoing task has been improving test coverage to enable us to refactor code with more confidence and also help test the correctness of the C++ port.

Most details of the C++ port were researched. A basic build system including the selected libraries was set up, and design work on the basic data structures has started, ahead of full porting which we expect to start next iteration.

The full list of Parsoid bugs closed in the last two weeks is available in Bugzilla.

2012-08-monthly
The Parsoid team reached a major milestone in August by implementing a template output encapsulation algorithm, and started to use it to support expanded template round-tripping. In parallel with this and the usual smaller tweaks, work on a C++ port of the parser was started. The port is expected to allow an efficient integration with PHP and Lua, improve performance and allow the parallelization of the parser in the longer term.

2012-09-03 (MW 1.20wmf11)
The Parsoid team reached a major milestone with basic round-tripping of expanded templates and the Cite extension. This includes the protection of closely coupled and unbalanced table start / row / end templates, which makes it possible to protect and later edit these in the Visual Editor.

On the C++ side, the work has now started to port the existing JavaScript code, starting with the Tokenizer. Basic token data structures and a reference counting scheme are implemented. The integration of the boost.asio event loop for asynchronous and parallel operations and the adaptation of the libhubbub HTML5 tree builder and libxml2 DOM are next steps.

The full list of Parsoid commits is available in Gerrit.

2012-09-17
In the JavaScript Parsoid implementation, we further improved support for round-tripping of templates and numerous other constructs. We now have an additional thirty parser tests and a similar number of round-trip tests passing. We started work on automated round-trip testing on dumps to provide a benchmark for progress and to identify the most important problem areas to focus on. We also added edit support for behavior switches and category links. To support selective serialization of the edited sections of the document without dirty diffs in unmodified sections, we are now associating DOM nodes with the source wikitext that produced that DOM.

On the C++ port, the data structures and synchronization / queueing strategies are now nearly complete. The tokenizer can handle very simple content (mainly headings) and populate the data structures. We started work on TokenTransformManagers. However, due to resource constraints, the C++ is currently a part-time effort, with most effort going into the temporary JavaScript implementation as the safest bet for the December release.

The full list of Parsoid commits is available in Gerrit.