mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-09-19 18:59:42 +00:00
99 lines
2.3 KiB
JavaScript
99 lines
2.3 KiB
JavaScript
/*\
|
|
title: $:/core/modules/indexers/tag-indexer.js
|
|
type: application/javascript
|
|
module-type: indexer
|
|
|
|
Indexes the tiddlers with each tag
|
|
|
|
\*/
|
|
(function(){
|
|
|
|
/*jslint node: true, browser: true */
|
|
/*global modules: false */
|
|
"use strict";
|
|
|
|
function TagIndexer(wiki) {
|
|
this.wiki = wiki;
|
|
}
|
|
|
|
TagIndexer.prototype.init = function() {
|
|
this.subIndexers = [
|
|
new TagSubIndexer(this,"each"),
|
|
new TagSubIndexer(this,"eachShadow"),
|
|
new TagSubIndexer(this,"eachTiddlerPlusShadows"),
|
|
new TagSubIndexer(this,"eachShadowPlusTiddlers")
|
|
];
|
|
$tw.utils.each(this.subIndexers,function(subIndexer) {
|
|
subIndexer.addIndexMethod();
|
|
});
|
|
};
|
|
|
|
TagIndexer.prototype.rebuild = function() {
|
|
$tw.utils.each(this.subIndexers,function(subIndexer) {
|
|
subIndexer.rebuild();
|
|
});
|
|
};
|
|
|
|
TagIndexer.prototype.update = function(updateDescriptor) {
|
|
$tw.utils.each(this.subIndexers,function(subIndexer) {
|
|
subIndexer.update(updateDescriptor);
|
|
});
|
|
};
|
|
|
|
function TagSubIndexer(indexer,iteratorMethod) {
|
|
this.indexer = indexer;
|
|
this.iteratorMethod = iteratorMethod;
|
|
this.index = null; // Hashmap of tag title to {isSorted: bool, titles: [array]} or null if not yet initialised
|
|
}
|
|
|
|
TagSubIndexer.prototype.addIndexMethod = function() {
|
|
var self = this;
|
|
this.indexer.wiki[this.iteratorMethod].byTag = function(tag) {
|
|
return self.lookup(tag).slice(0);
|
|
};
|
|
};
|
|
|
|
TagSubIndexer.prototype.rebuild = function() {
|
|
var self = this;
|
|
// Hashmap by tag of array of {isSorted:, titles:[]}
|
|
this.index = Object.create(null);
|
|
// Add all the tags
|
|
this.indexer.wiki[this.iteratorMethod](function(tiddler,title) {
|
|
$tw.utils.each(tiddler.fields.tags,function(tag) {
|
|
if(!self.index[tag]) {
|
|
self.index[tag] = {isSorted: false, titles: [title]};
|
|
} else {
|
|
self.index[tag].titles.push(title);
|
|
}
|
|
});
|
|
});
|
|
};
|
|
|
|
TagSubIndexer.prototype.update = function(updateDescriptor) {
|
|
this.index = null;
|
|
};
|
|
|
|
TagSubIndexer.prototype.lookup = function(tag) {
|
|
// Update the index if it has yet to be built
|
|
if(this.index === null) {
|
|
this.rebuild();
|
|
}
|
|
var indexRecord = this.index[tag];
|
|
if(indexRecord) {
|
|
if(!indexRecord.isSorted) {
|
|
if(this.indexer.wiki.sortByList) {
|
|
indexRecord.titles = this.indexer.wiki.sortByList(indexRecord.titles,tag);
|
|
}
|
|
indexRecord.isSorted = true;
|
|
}
|
|
return indexRecord.titles;
|
|
} else {
|
|
return [];
|
|
}
|
|
};
|
|
|
|
|
|
exports.TagIndexer = TagIndexer;
|
|
|
|
})();
|