Subramanya Sastry b059502b3e Extension handling rewrite + cite extension refactoring. ... Tokenization ------------ * Fixed tokenizer to correctly parse extension tags in different contexts: with start and end tags, in self-closing tag mode, and to correctly handle scenarios when the exension end-tag is followed by a '#' (the special char used to skip over extension content). * Removed the distinction in the tokenizer between installed extensions and natively supported extension tags (<ref> and <references> for ex.). They all tokenize and get processed identically and get handled by different paths in the extension handler. * Template and TemplateArg tokens now carry tpl. transclusion source alongwith them since tsr information will not be accurate when they show up in extension contexts that in turn showed up in template context that were expanded by the php preprocessor. Ex: {{echo|<ref>{{echo|foo}}</ref>}} The tsr for the ref-tag will correspond to the template-source of the echo-template, NOT the original top-level page. So, env.page.src.substring(..) will return incorrect source for the innermost {{echo|foo}}. This fix of carrying along tpl transclusion source in the token itself eliminates this problem. Knowledge of native extensions ------------------------------ * Natively implemented extension tags (<ref> and <references>) are hardcoded in env.conf.parsoid. At some point, it would be good to have a registration mechanism for parsoid-native extensions. Extension handling ------------------ * Extracted extension handling out of the template handler into its own handler class. Right now, this class inherits from the template handler in order to be able to reuse a lot of the expansion and encapsulation functionality currently in the Template Handler. * This handler now handles extensions that are: (a) natively implemented and registered with Parsoid. (b) implemented as a PHP extension and expanded by relying on the PHP preprocessor. For (a), it uses information from env.conf.parsoid to find ext-handlers for natively implemented ext-tags. However, this can be cleaned up at some point by making available a registration mechanism. Cite/Ref/References ------------------- * Reworked the cite handler to split up ref-token processing and references token processing. * The handler now processes ref-tokens, parses content all the way to html output and encapsulates the html in an attribute of a meta-token that serves as a placeholder for where the ref-token occured. * References are handled as a DOM post-pass where these meta placeholder tokens are collected, content extracted from the attribute and spit out at the site of a references tag. The DOM walking is in DOMPostProcessor.js, but the actual processing is part of the Cite.js to keep all cite extension handling code in one place. Parser pipeline --------------- * Restructured parser pipeline recipes based on changes to Cite, TemplateHandler, and ExtensionHandler. * Added a couple functions to the parser pipeline: 1. resetState to reset state before starting a new top-level parse when pipelines are reused across top-level parses (ex: parser tests) 2. setSourceOffsets to set start/end offsets of the source being handled by the pipeline. This is required to correctly set tsr values when extension content (which is a substring of original top-level text) is parsed in its own pipeline. Other fixes ----------- * Removed env parameter from the Params object since it was not being used and seemed like unnecessary state propagation. * Removed a FIXME in DOMUtils.buildTokensFromDOM by reusing code in the tokenizer that converts "\n" in text to NlTks. * Cleanup of Util.shiftTokenTSR. * ext.util.TokenCollection is now no longer used by anything. Added a FIXME and left around in case we are able to improve tokenizing and handling of *include* tags that can eliminate the need for the messy TokenAndAttrCollector. Test results ------------ * No change in parser tests results. * Tested with a few different files. - en:BO page seems to be parsed about 10% faster than before (needs verification). - Referencs on the en:BO page seem to be more accurate than before. Change-Id: I8a095fa9fa976c7b3a2a4bd968dc9db4270b105f		2013-03-14 15:25:45 -05:00
..
ext.Cite.js	Extension handling rewrite + cite extension refactoring.	2013-03-14 15:25:45 -05:00