mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-11-15 18:39:52 +00:00
8368e17d6a
* All parser pipelines including tokenizer and DOM stuff are now constructed
from a 'recipe' data structure in a ParserPipelineFactory.
* All sub-pipelines of these can now be cached
* Event registrations to a pipeline are directly forwarded to the last
pipeline member to save relatively expensive event forwarding.
* Some APIs for on-demand expansion / format conversion of parameters from
parser functions are added:
param.to('tokens/expanded', cb)
param.to('text/wiki', cb) (this does not work yet)
All parameters are additionally wrapped into a Param object that provides
method for positional parameter naming (.named() or conversion to a dict
(.dict()).
* The async token transform manager is now separated from a frame object, with
the frame holding arguments, an on-demand expansion method and loop checks.
* Only keys of template parameters are now expanded. Parser functions or
template arguments trigger an expansion on-demand. This (unsurprisingly)
makes a big performance difference with typical switch-heavy template
systems.
* Return values from async transforms are no longer used in favor of plain
callbacks. This saves the complication of having to maintain two code paths.
A trick in transformTokens still avoids the construction of unneeded
TokenAccumulators.
* The results of template expansions are no longer buffered.
* 301 parser tests are passing
Known issues:
* Cosmetic cleanup remains to do
* Some parser functions do not support async expansions yet, and need to be
modified.
Change-Id: I1a7690baffbe8141cadf67270904a1b2e1df879a
83 lines
2.2 KiB
JavaScript
83 lines
2.2 KiB
JavaScript
/* Perform post-processing steps on an already-built HTML DOM. */
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var events = require('events'),
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util = require('./ext.Util.js'),
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Util = new util.Util();
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// Quick HACK: define Node constants
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// https://developer.mozilla.org/en/nodeType
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var Node = {
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TEXT_NODE: 3,
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COMMENT_NODE: 8
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};
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var isElementContentWhitespace = function ( e ) {
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return (e.data.match(/^[ \r\n\t]*$/) !== null);
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};
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// Wrap all top-level inline elements in paragraphs. This should also be
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// applied inside block-level elements, but in that case the first paragraph
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// usually remains plain inline.
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var process_inlines_in_p = function ( document ) {
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var body = document.body,
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newP = document.createElement('p'),
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cnodes = body.childNodes,
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inParagraph = false,
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deleted = 0;
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for(var i = 0, length = cnodes.length; i < length; i++) {
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var child = cnodes[i - deleted],
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ctype = child.nodeType;
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//console.warn(child + ctype);
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if ((ctype === 3 && (inParagraph || !isElementContentWhitespace( child ))) ||
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(ctype === Node.COMMENT_NODE && inParagraph ) ||
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(ctype !== Node.TEXT_NODE &&
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ctype !== Node.COMMENT_NODE &&
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!Util.isBlockTag(child.nodeName.toLowerCase()))
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)
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{
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// wrap in paragraph
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newP.appendChild(child);
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inParagraph = true;
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deleted++;
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} else if (inParagraph) {
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body.insertBefore(newP, child);
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deleted--;
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newP = document.createElement('p');
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inParagraph = false;
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}
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}
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if (inParagraph) {
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body.appendChild(newP);
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}
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};
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function DOMPostProcessor () {
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this.processors = [process_inlines_in_p];
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}
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// Inherit from EventEmitter
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DOMPostProcessor.prototype = new events.EventEmitter();
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DOMPostProcessor.prototype.constructor = DOMPostProcessor;
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DOMPostProcessor.prototype.doPostProcess = function ( document ) {
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for(var i = 0; i < this.processors.length; i++) {
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this.processors[i](document);
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}
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this.emit( 'document', document );
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};
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/**
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* Register for the 'document' event, normally emitted form the HTML5 tree
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* builder.
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*/
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DOMPostProcessor.prototype.addListenersOn = function ( emitter ) {
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emitter.addListener( 'document', this.doPostProcess.bind( this ) );
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}
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if (typeof module == "object") {
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module.exports.DOMPostProcessor = DOMPostProcessor;
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}
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