mediawiki-extensions-Visual.../modules/parser/ext.core.AttributeExpander.js

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/**
* Generic attribute expansion handler.
*
* @author Gabriel Wicke <gwicke@wikimedia.org>
*/
var $ = require('jquery'),
request = require('request'),
events = require('events'),
qs = require('querystring'),
ParserFunctions = require('./ext.core.ParserFunctions.js').ParserFunctions,
AttributeTransformManager = require('./mediawiki.TokenTransformManager.js')
.AttributeTransformManager,
defines = require('./mediawiki.parser.defines.js');
function AttributeExpander ( manager ) {
this.reset();
this.register( manager );
}
AttributeExpander.prototype.reset = function ( token ) {
return {token: token};
};
// constants
AttributeExpander.prototype.rank = 1.11;
AttributeExpander.prototype.register = function ( manager ) {
this.manager = manager;
// Register for template and templatearg tag tokens
manager.addTransform( this.onToken.bind(this),
this.rank, 'any' );
};
/**
* Token handler
*
* Expands target and arguments (both keys and values) and either directly
* calls or sets up the callback to _expandTemplate, which then fetches and
* processes the template.
*/
AttributeExpander.prototype.onToken = function ( token, frame, cb ) {
this.manager.env.dp( 'AttributeExpander.onToken', token );
if ( token.constructor === TagTk ||
token.constructor === SelfclosingTagTk &&
token.attribs &&
token.attribs.length ) {
var expandData = {
token: token,
cb: cb
};
var atm = new AttributeTransformManager(
this.manager,
this._returnAttributes.bind( this, expandData )
);
if( atm.process( token.attribs ) ) {
// Attributes were transformed synchronously
this.manager.env.dp (
'sync attribs for ', token
);
// All attributes are fully expanded synchronously (no IO was needed)
return { token: token };
} else {
// Async attribute expansion is going on
this.manager.env.dp( 'async return for ', token );
expandData.async = true;
return { async: true };
}
} else {
token.rank = this.rank;
return { token: token };
}
};
/**
* Callback for argument (including target) expansion in AttributeTransformManager
*/
AttributeExpander.prototype._returnAttributes = function ( expandData,
attributes )
{
this.manager.env.dp( 'AttributeExpander._returnAttributes: ',attributes );
// Remove the target from the attributes
expandData.token.attribs = attributes;
if ( expandData.async ) {
expandData.token.rank = this.rank;
expandData.cb( [expandData.token], false );
}
};
if (typeof module == "object") {
module.exports.AttributeExpander = AttributeExpander;
}