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mirror of https://github.com/Jermolene/TiddlyWiki5 synced 2024-07-03 02:33:15 +00:00
TiddlyWiki5/core/modules/filters/field.js
Jeremy Ruston a8f70b08a8
Add indexes to the wiki store to improve performance (#3951)
* First pass at modular wiki indexes

An exploratory experiment

* Fix tests

* Faster checking for existence of index methods

We don't really need to check the type

* Use the index for the has operator

* Fix typo

* Move iterator index methods into indexer modules

Now boot.js doesn't know the core indexers

* Fix up the other iterator index functions

* Fix crash with missing index branch

* Limit the field indexer to values less than 128 characters

* Fallback to the old manual scan if the index method returns null
* Sadly, we can no longe re-use the field indexer to accelerate the `has` operator, because the index now omits tiddlers that have field values longer than the limit

Still need to make the index configuration exposed somehow

* Rearrange tests so that we can test with and without indexers

We also need to expose the list of enabled indexers as a config option

* Test the field indexer with different length fields

So that we test the indexed and non-indexed codepaths
2019-05-24 21:07:37 +01:00

76 lines
1.6 KiB
JavaScript

/*\
title: $:/core/modules/filters/field.js
type: application/javascript
module-type: filteroperator
Filter operator for comparing fields for equality
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
/*
Export our filter function
*/
exports.field = function(source,operator,options) {
var results = [],indexedResults,
fieldname = (operator.suffix || operator.operator || "title").toLowerCase();
if(operator.prefix === "!") {
if(operator.regexp) {
source(function(tiddler,title) {
if(tiddler) {
var text = tiddler.getFieldString(fieldname);
if(text !== null && !operator.regexp.exec(text)) {
results.push(title);
}
} else {
results.push(title);
}
});
} else {
source(function(tiddler,title) {
if(tiddler) {
var text = tiddler.getFieldString(fieldname);
if(text !== null && text !== operator.operand) {
results.push(title);
}
} else {
results.push(title);
}
});
}
} else {
if(operator.regexp) {
source(function(tiddler,title) {
if(tiddler) {
var text = tiddler.getFieldString(fieldname);
if(text !== null && !!operator.regexp.exec(text)) {
results.push(title);
}
}
});
} else {
if(source.byField) {
indexedResults = source.byField(fieldname,operator.operand);
if(indexedResults) {
return indexedResults
}
}
source(function(tiddler,title) {
if(tiddler) {
var text = tiddler.getFieldString(fieldname);
if(text !== null && text === operator.operand) {
results.push(title);
}
}
});
}
}
return results;
};
})();