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Code Issues Releases Wiki Activity

refactor: move transcludes ast extractor to a file

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lin onetwo 2024-06-17 17:50:23 +08:00
parent 967657c6dd
commit 61d5484f09
2 changed files with 90 additions and 76 deletions
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90
core/modules/wiki-extract.js Normal file
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@ -0,0 +1,90 @@
/*\
title: $:/core/modules/wiki-extract.js
type: application/javascript
module-type: wikimethod
AST information extractor for indexers.
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
/*
Return an array of tiddler titles that are directly transcluded within the given parse tree. `title` is the tiddler being parsed, we will ignore its self-referential transclusions, only return
*/
exports.extractTranscludes = function(parseTreeRoot, title) {
// Count up the transcludes
var transcludes = [],
checkParseTree = function(parseTree, parentNode) {
for(var t=0; t<parseTree.length; t++) {
var parseTreeNode = parseTree[t];
if(parseTreeNode.type === "transclude") {
if(parseTreeNode.attributes.$tiddler && parseTreeNode.attributes.$tiddler.type === "string") {
var value;
// if it is Transclusion with Templates like `{{Index||$:/core/ui/TagTemplate}}`, the `$tiddler` will point to the template. We need to find the actual target tiddler from parent node
if(parentNode && parentNode.type === "tiddler" && parentNode.attributes.tiddler && parentNode.attributes.tiddler.type === "string") {
// Empty value (like `{{!!field}}`) means self-referential transclusion.
value = parentNode.attributes.tiddler.value || title;
} else {
value = parseTreeNode.attributes.$tiddler.value;
}
} else if(parseTreeNode.attributes.tiddler && parseTreeNode.attributes.tiddler.type === "string") {
// Old transclude widget usage
value = parseTreeNode.attributes.tiddler.value;
} else if(parseTreeNode.attributes.$field && parseTreeNode.attributes.$field.type === "string") {
// Empty value (like `<$transclude $field='created'/>`) means self-referential transclusion.
value = title;
} else if(parseTreeNode.attributes.field && parseTreeNode.attributes.field.type === "string") {
// Old usage with Empty value (like `<$transclude field='created'/>`)
value = title;
}
// Deduplicate the result.
if(value && transcludes.indexOf(value) === -1) {
transcludes.push(value);
}
}
if(parseTreeNode.children) {
checkParseTree(parseTreeNode.children, parseTreeNode);
}
}
};
checkParseTree(parseTreeRoot);
return transcludes;
};
/*
Return an array of tiddler titles that are transcluded from the specified tiddler
*/
exports.getTiddlerTranscludes = function(title) {
var self = this;
// We'll cache the transcludes so they only get computed if the tiddler changes
return this.getCacheForTiddler(title,"transcludes",function() {
// Parse the tiddler
var parser = self.parseTiddler(title);
if(parser) {
// this will ignore self-referential transclusions from `title`
return self.extractTranscludes(parser.tree, title);
}
return [];
});
};
/*
Return an array of tiddler titles that transclude to the specified tiddler
*/
exports.getTiddlerBacktranscludes = function(targetTitle) {
var self = this,
backIndexer = this.getIndexer("BackIndexer"),
backtranscludes = backIndexer && backIndexer.subIndexers.transclude.lookup(targetTitle);
if(!backtranscludes) {
backtranscludes = [];
}
return backtranscludes;
};
})();

76
core/modules/wiki.js
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@ -549,82 +549,6 @@ exports.getTiddlerBacklinks = function(targetTitle) {
return backlinks;
};
/*
Return an array of tiddler titles that are directly transcluded within the given parse tree. `title` is the tiddler being parsed, we will ignore its self-referential transclusions, only return
*/
exports.extractTranscludes = function(parseTreeRoot, title) {
// Count up the transcludes
var transcludes = [],
checkParseTree = function(parseTree, parentNode) {
for(var t=0; t<parseTree.length; t++) {
var parseTreeNode = parseTree[t];
if(parseTreeNode.type === "transclude") {
if(parseTreeNode.attributes.$tiddler && parseTreeNode.attributes.$tiddler.type === "string") {
var value;
// if it is Transclusion with Templates like `{{Index||$:/core/ui/TagTemplate}}`, the `$tiddler` will point to the template. We need to find the actual target tiddler from parent node
if(parentNode && parentNode.type === "tiddler" && parentNode.attributes.tiddler && parentNode.attributes.tiddler.type === "string") {
// Empty value (like `{{!!field}}`) means self-referential transclusion.
value = parentNode.attributes.tiddler.value || title;
} else {
value = parseTreeNode.attributes.$tiddler.value;
}
} else if(parseTreeNode.attributes.tiddler && parseTreeNode.attributes.tiddler.type === "string") {
// Old transclude widget usage
value = parseTreeNode.attributes.tiddler.value;
} else if(parseTreeNode.attributes.$field && parseTreeNode.attributes.$field.type === "string") {
// Empty value (like `<$transclude $field='created'/>`) means self-referential transclusion.
value = title;
} else if(parseTreeNode.attributes.field && parseTreeNode.attributes.field.type === "string") {
// Old usage with Empty value (like `<$transclude field='created'/>`)
value = title;
}
// Deduplicate the result.
if(value && transcludes.indexOf(value) === -1) {
transcludes.push(value);
}
}
if(parseTreeNode.children) {
checkParseTree(parseTreeNode.children, parseTreeNode);
}
}
};
checkParseTree(parseTreeRoot);
return transcludes;
};
/*
Return an array of tiddler titles that are transcluded from the specified tiddler
*/
exports.getTiddlerTranscludes = function(title) {
var self = this;
// We'll cache the transcludes so they only get computed if the tiddler changes
return this.getCacheForTiddler(title,"transcludes",function() {
// Parse the tiddler
var parser = self.parseTiddler(title);
if(parser) {
// this will ignore self-referential transclusions from `title`
return self.extractTranscludes(parser.tree, title);
}
return [];
});
};
/*
Return an array of tiddler titles that transclude to the specified tiddler
*/
exports.getTiddlerBacktranscludes = function(targetTitle) {
var self = this,
backIndexer = this.getIndexer("BackIndexer"),
backtranscludes = backIndexer && backIndexer.subIndexers.transclude.lookup(targetTitle);
if(!backtranscludes) {
backtranscludes = [];
}
return backtranscludes;
};
/*
Return a hashmap of tiddler titles that are referenced but not defined. Each value is the number of times the missing tiddler is referenced
*/