80 lines
2.1 KiB
JavaScript
80 lines
2.1 KiB
JavaScript
/*\
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title: $:/core/dependencies.js
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type: application/javascript
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module-type: global
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Represents the dependencies of a tiddler or a parser node as these fields:
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tiddlers: A hashmap of explicitly tiddler titles, with the value `false` if the dependency is skinny, and `true` if it is fat
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dependentAll: True if there is an implicit skinny dependency on all available tiddlers
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dependentOnContextTiddler: True if the node has a fat dependency on the current context tiddler
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\*/
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(function(){
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/*jslint node: true */
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"use strict";
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var Dependencies = function(skinnyTiddlers,fatTiddlers,dependentAll) {
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var t,title;
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this.tiddlers = {};
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this.dependentAll = dependentAll;
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if(skinnyTiddlers) {
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for(t=0; t<skinnyTiddlers.length; t++) {
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title = skinnyTiddlers[t];
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if(typeof title === "string" && title !== "") {
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this.tiddlers[title] = false;
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}
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}
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}
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if(fatTiddlers) {
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for(t=0; t<fatTiddlers.length; t++) {
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title = fatTiddlers[t];
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if(typeof title === "string" && title !== "") {
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this.tiddlers[title] = true;
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}
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}
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}
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};
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/*
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Adds a dependency to a given tiddler. Note how setting a dependency of fat=false on a tiddler that already has
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a dependency of fat=true will leave the fat setting as true
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*/
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Dependencies.prototype.addDependency = function(tiddlerTitle,fat) {
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if(!this.tiddlers[tiddlerTitle]) {
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this.tiddlers[tiddlerTitle] = fat;
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}
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};
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Dependencies.prototype.mergeDependencies = function(dep) {
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this.dependentAll = dep.dependentAll || this.dependentAll;
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for(var t in dep.tiddlers) {
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this.addDependency(t,dep.tiddlers[t]);
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}
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};
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/*
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Determine if these dependencies are impacted by the specified array of changes
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changes: Hashmap of {modified: bool, deleted: bool}
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contextTiddlerTitle: The title of the current context tiddler
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*/
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Dependencies.prototype.hasChanged = function(changes,contextTiddlerTitle) {
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if(this.dependentAll) {
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return true;
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}
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if(!!this.dependentOnContextTiddler && contextTiddlerTitle && changes.hasOwnProperty(contextTiddlerTitle)) {
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return true;
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}
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for(var c in changes) {
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if(this.tiddlers.hasOwnProperty(c)) {
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return true;
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}
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}
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return false;
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};
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exports.Dependencies = Dependencies;
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})();
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