mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-07-03 10:43:16 +00:00
e39d246317
Links are now draggable. Dragging outside the browser will drop the wiki text of the tiddler. Dragging to another TW5 browser window will drop the entire tiddler, including fields.
725 lines
20 KiB
JavaScript
725 lines
20 KiB
JavaScript
/*\
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title: $:/core/modules/wiki.js
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type: application/javascript
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module-type: wikimethod
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Extension methods for the $tw.Wiki object
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Adds the following properties to the wiki object:
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* `eventListeners` is a hashmap by type of arrays of listener functions
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* `changedTiddlers` is a hashmap describing changes to named tiddlers since wiki change events were
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last dispatched. Each entry is a hashmap containing two fields:
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modified: true/false
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deleted: true/false
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* `changeCount` is a hashmap by tiddler title containing a numerical index that starts at zero and is
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incremented each time a tiddler is created changed or deleted
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* `caches` is a hashmap by tiddler title containing a further hashmap of named cache objects. Caches
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are automatically cleared when a tiddler is modified or deleted
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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/*
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Get the value of a text reference. Text references can have any of these forms:
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<tiddlertitle>
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<tiddlertitle>!!<fieldname>
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!!<fieldname> - specifies a field of the current tiddlers
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<tiddlertitle>##<field>
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*/
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exports.getTextReference = function(textRef,defaultText,currTiddlerTitle) {
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var tr = $tw.utils.parseTextReference(textRef),
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title = tr.title || currTiddlerTitle;
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if(tr.field) {
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var tiddler = this.getTiddler(title);
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if(tiddler && $tw.utils.hop(tiddler.fields,tr.field)) {
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return tiddler.fields[tr.field];
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} else {
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return defaultText;
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}
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} else if(tr.index) {
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return this.extractTiddlerDataItem(title,tr.index,defaultText);
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} else {
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return this.getTiddlerText(title,defaultText);
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}
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};
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exports.setTextReference = function(textRef,value,currTiddlerTitle) {
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var tr = $tw.utils.parseTextReference(textRef),
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title,tiddler,fields;
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// Check if it is a reference to a tiddler
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if(tr.title && !tr.field) {
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tiddler = this.getTiddler(tr.title);
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this.addTiddler(new $tw.Tiddler(tiddler,{title: tr.title,text: value}));
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// Else check for a field reference
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} else if(tr.field) {
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title = tr.title || currTiddlerTitle;
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tiddler = this.getTiddler(title);
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if(tiddler) {
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fields = {};
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fields[tr.field] = value;
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this.addTiddler(new $tw.Tiddler(tiddler,fields));
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}
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}
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};
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exports.deleteTextReference = function(textRef,currTiddlerTitle) {
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var tr = $tw.utils.parseTextReference(textRef),
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title,tiddler,fields;
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// Check if it is a reference to a tiddler
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if(tr.title && !tr.field) {
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this.deleteTiddler(tr.title);
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// Else check for a field reference
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} else if(tr.field) {
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title = tr.title || currTiddlerTitle;
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tiddler = this.getTiddler(title);
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if(tiddler && $tw.utils.hop(tiddler.fields,tr.field)) {
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fields = {};
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fields[tr.field] = undefined;
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this.addTiddler(new $tw.Tiddler(tiddler,fields));
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}
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}
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};
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exports.addEventListener = function(type,listener) {
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this.eventListeners = this.eventListeners || {};
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this.eventListeners[type] = this.eventListeners[type] || [];
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this.eventListeners[type].push(listener);
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};
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exports.removeEventListener = function(type,listener) {
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var listeners = this.eventListeners[type];
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if(listeners) {
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var p = listeners.indexOf(listener);
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if(p !== -1) {
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listeners.splice(p,1);
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}
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}
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};
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exports.dispatchEvent = function(type /*, args */) {
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var args = Array.prototype.slice.call(arguments,1),
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listeners = this.eventListeners[type];
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if(listeners) {
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for(var p=0; p<listeners.length; p++) {
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var listener = listeners[p];
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listener.apply(listener,args);
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}
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}
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};
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/*
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Causes a tiddler to be marked as changed, incrementing the change count, and triggers event handlers.
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This method should be called after the changes it describes have been made to the wiki.tiddlers[] array.
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title: Title of tiddler
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isDeleted: defaults to false (meaning the tiddler has been created or modified),
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true if the tiddler has been created
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*/
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exports.enqueueTiddlerEvent = function(title,isDeleted) {
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// Record the touch in the list of changed tiddlers
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this.changedTiddlers = this.changedTiddlers || {};
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this.changedTiddlers[title] = this.changedTiddlers[title] || [];
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this.changedTiddlers[title][isDeleted ? "deleted" : "modified"] = true;
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// Increment the change count
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this.changeCount = this.changeCount || {};
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if($tw.utils.hop(this.changeCount,title)) {
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this.changeCount[title]++;
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} else {
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this.changeCount[title] = 1;
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}
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// Trigger events
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this.eventListeners = this.eventListeners || [];
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if(!this.eventsTriggered) {
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var self = this;
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$tw.utils.nextTick(function() {
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var changes = self.changedTiddlers;
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self.changedTiddlers = {};
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self.eventsTriggered = false;
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self.dispatchEvent("change",changes);
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});
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this.eventsTriggered = true;
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}
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};
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exports.getChangeCount = function(title) {
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this.changeCount = this.changeCount || {};
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if($tw.utils.hop(this.changeCount,title)) {
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return this.changeCount[title];
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} else {
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return 0;
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}
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};
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exports.deleteTiddler = function(title) {
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delete this.tiddlers[title];
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this.clearCache(title);
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this.enqueueTiddlerEvent(title,true);
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};
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exports.tiddlerExists = function(title) {
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return !!this.tiddlers[title];
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};
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exports.isSystemTiddler = function(title) {
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return title.indexOf("$:/") === 0;
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};
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exports.isTemporaryTiddler = function(title) {
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return title.indexOf("$:/temp/") === 0;
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};
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exports.isShadowTiddler = function(title) {
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return $tw.utils.hop(this.shadowTiddlers,title);
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};
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exports.addTiddler = function(tiddler) {
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// Check if we're passed a fields hashmap instead of a tiddler
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if(!(tiddler instanceof $tw.Tiddler)) {
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tiddler = new $tw.Tiddler(tiddler);
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}
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// Get the title
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var title = tiddler.fields.title;
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// Save the tiddler
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this.tiddlers[title] = tiddler;
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this.clearCache(title);
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this.enqueueTiddlerEvent(title);
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};
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/*
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Return a sorted array of non-system tiddler titles, optionally filtered by a tag
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*/
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exports.getTiddlers = function(sortField,excludeTag) {
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sortField = sortField || "title";
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var tiddlers = [], t, titles = [];
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for(t in this.tiddlers) {
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if($tw.utils.hop(this.tiddlers,t) && !this.isSystemTiddler(t) && (!excludeTag || !this.tiddlers[t].hasTag(excludeTag))) {
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tiddlers.push(this.tiddlers[t]);
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}
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}
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tiddlers.sort(function(a,b) {
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var aa = a.fields[sortField].toLowerCase() || "",
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bb = b.fields[sortField].toLowerCase() || "";
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if(aa < bb) {
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return -1;
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} else {
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if(aa > bb) {
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return 1;
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} else {
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return 0;
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}
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}
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});
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for(t=0; t<tiddlers.length; t++) {
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titles.push(tiddlers[t].fields.title);
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}
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return titles;
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};
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exports.countTiddlers = function(excludeTag) {
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var tiddlers = this.getTiddlers(null,excludeTag);
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return $tw.utils.count(tiddlers);
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};
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/*
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Sort an array of tiddler titles by a specified field
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titles: array of titles (sorted in place)
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sortField: name of field to sort by
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isDescending: true if the sort should be descending
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isCaseSensitive: true if the sort should consider upper and lower case letters to be different
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*/
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exports.sortTiddlers = function(titles,sortField,isDescending,isCaseSensitive) {
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var self = this;
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titles.sort(function(a,b) {
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if(sortField !== "title") {
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a = self.getTiddler(a).fields[sortField] || "";
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b = self.getTiddler(b).fields[sortField] || "";
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}
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if(!isCaseSensitive) {
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if(typeof a === "string") {
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a = a.toLowerCase();
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}
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if(typeof b === "string") {
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b = b.toLowerCase();
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}
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}
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if(a < b) {
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return isDescending ? +1 : -1;
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} else {
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if(a > b) {
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return isDescending ? -1 : +1;
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} else {
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return 0;
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}
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}
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});
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};
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exports.forEachTiddler = function(/* [sortField,[excludeTag,]]callback */) {
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var arg = 0,
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sortField = arguments.length > 1 ? arguments[arg++] : null,
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excludeTag = arguments.length > 2 ? arguments[arg++] : null,
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callback = arguments[arg++],
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titles = this.getTiddlers(sortField,excludeTag),
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t, tiddler;
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for(t=0; t<titles.length; t++) {
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tiddler = this.tiddlers[titles[t]];
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if(tiddler) {
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callback.call(this,tiddler.fields.title,tiddler);
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}
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}
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};
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/*
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Return an array of tiddler titles that are directly linked from the specified tiddler
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*/
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exports.getTiddlerLinks = function(title) {
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var self = this;
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// We'll cache the links so they only get computed if the tiddler changes
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return this.getCacheForTiddler(title,"links",function() {
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// Parse the tiddler
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var parser = self.parseTiddler(title);
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// Count up the links
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var links = [],
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checkParseTree = function(parseTree) {
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for(var t=0; t<parseTree.length; t++) {
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var parseTreeNode = parseTree[t];
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if(parseTreeNode.type === "element" && parseTreeNode.tag === "$link" && parseTreeNode.attributes.to.type === "string") {
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var value = parseTreeNode.attributes.to.value;
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if(links.indexOf(value) === -1) {
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links.push(value);
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}
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}
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if(parseTreeNode.children) {
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checkParseTree(parseTreeNode.children);
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}
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}
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};
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if(parser) {
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checkParseTree(parser.tree);
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}
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return links;
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});
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};
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/*
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Return an array of tiddler titles that link to the specified tiddler
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*/
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exports.getTiddlerBacklinks = function(targetTitle) {
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var self = this,
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backlinks = [];
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this.forEachTiddler(function(title,tiddler) {
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var links = self.getTiddlerLinks(title);
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if(links.indexOf(targetTitle) !== -1) {
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backlinks.push(title);
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}
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});
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return backlinks;
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};
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/*
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Return a hashmap of tiddler titles that are referenced but not defined. Each value is the number of times the missing tiddler is referenced
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*/
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exports.getMissingTitles = function() {
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var self = this,
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missing = [];
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// We should cache the missing tiddler list, even if we recreate it every time any tiddler is modified
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this.forEachTiddler(function(title,tiddler) {
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var links = self.getTiddlerLinks(title);
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$tw.utils.each(links,function(link) {
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if(!self.tiddlerExists(link) && missing.indexOf(link) === -1) {
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missing.push(link);
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}
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});
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});
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return missing;
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};
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exports.getOrphanTitles = function() {
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var self = this,
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orphans = this.getTiddlers();
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this.forEachTiddler(function(title,tiddler) {
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var links = self.getTiddlerLinks(title);
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$tw.utils.each(links,function(link) {
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var p = orphans.indexOf(link);
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if(p !== -1) {
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orphans.splice(p,1);
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}
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});
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});
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return orphans; // Todo
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};
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exports.getSystemTitles = function() {
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var titles = [];
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for(var title in this.tiddlers) {
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if(this.isSystemTiddler(title)) {
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titles.push(title);
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}
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}
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titles.sort();
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return titles;
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};
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exports.getShadowTitles = function() {
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var titles = [];
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for(var title in this.shadowTiddlers) {
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titles.push(title);
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}
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titles.sort();
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return titles;
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};
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/*
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Retrieves a list of the tiddler titles that are tagged with a given tag
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*/
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exports.getTiddlersWithTag = function(tag) {
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var titles = [];
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for(var title in this.tiddlers) {
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var tiddler = this.tiddlers[title];
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if(tiddler.fields.tags && tiddler.fields.tags.indexOf(tag) !== -1) {
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titles.push(title);
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}
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}
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return titles;
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};
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/*
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Retrieve a tiddler as a JSON string of the fields
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*/
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exports.getTiddlerAsJson = function(title) {
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var tiddler = this.getTiddler(title);
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if(tiddler) {
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var fields = {};
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$tw.utils.each(tiddler.fields,function(value,name) {
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fields[name] = tiddler.getFieldString(name);
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});
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return JSON.stringify(fields);
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} else {
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return JSON.stringify({title: title});
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}
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};
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/*
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Get a tiddlers content as a JavaScript object. How this is done depends on the type of the tiddler:
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application/json: the tiddler JSON is parsed into an object
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application/x-tiddler-dictionary: the tiddler is parsed as sequence of name:value pairs
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Other types currently just return null.
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*/
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exports.getTiddlerData = function(title,defaultData) {
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var tiddler = this.getTiddler(title),
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data;
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if(tiddler && tiddler.fields.text) {
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switch(tiddler.fields.type) {
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case "application/json":
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// JSON tiddler
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try {
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data = JSON.parse(tiddler.fields.text);
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} catch(ex) {
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return defaultData;
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}
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return data;
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case "application/x-tiddler-dictionary":
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return $tw.utils.parseFields(tiddler.fields.text);
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}
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}
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return defaultData;
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};
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/*
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Extract an indexed field from within a data tiddler
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*/
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exports.extractTiddlerDataItem = function(title,index,defaultText) {
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var data = this.getTiddlerData(title,{}),
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text;
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if(data && $tw.utils.hop(data,index)) {
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text = data[index];
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}
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if(typeof text === "string" || typeof text === "number") {
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return text.toString();
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} else {
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return defaultText;
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}
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};
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/*
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Set a tiddlers content to a JavaScript object. Currently this is done by setting the tiddler's type to "application/json" and setting the text to the JSON text of the data.
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*/
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exports.setTiddlerData = function(title,data) {
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var tiddler = this.getTiddler(title);
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this.addTiddler(new $tw.Tiddler(tiddler,{title: title, type: "application/json", text: JSON.stringify(data,null,$tw.config.preferences.jsonSpaces)}));
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};
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/*
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Return the content of a tiddler as an array containing each line
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*/
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exports.getTiddlerList = function(title) {
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var tiddler = this.getTiddler(title);
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if(tiddler && tiddler.fields.text && tiddler.fields.text.length > 0) {
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return tiddler.fields.text.split("\n");
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}
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return [];
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};
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// Return the named cache object for a tiddler. If the cache doesn't exist then the initializer function is invoked to create it
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exports.getCacheForTiddler = function(title,cacheName,initializer) {
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this.caches = this.caches || {};
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var caches = this.caches[title];
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if(caches && caches[cacheName]) {
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return caches[cacheName];
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} else {
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if(!caches) {
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caches = {};
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this.caches[title] = caches;
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}
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caches[cacheName] = initializer();
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return caches[cacheName];
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}
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};
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// Clear all caches associated with a particular tiddler
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exports.clearCache = function(title) {
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this.caches = this.caches || {};
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if($tw.utils.hop(this.caches,title)) {
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delete this.caches[title];
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}
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};
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exports.initParsers = function(moduleType) {
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// Install the new parser modules
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$tw.wiki.parsers = {};
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var self = this;
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$tw.modules.forEachModuleOfType("parser",function(title,module) {
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for(var f in module) {
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if($tw.utils.hop(module,f)) {
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$tw.wiki.parsers[f] = module[f]; // Store the parser class
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}
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}
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});
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};
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/*
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Parse a block of text of a specified MIME type
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type: content type of text to be parsed
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text: text
|
|
options: see below
|
|
Options include:
|
|
parseAsInline: if true, the text of the tiddler will be parsed as an inline run
|
|
*/
|
|
exports.parseText = function(type,text,options) {
|
|
options = options || {};
|
|
// Select a parser
|
|
var Parser = this.parsers[type];
|
|
if(!Parser && $tw.config.fileExtensionInfo[type]) {
|
|
Parser = this.parsers[$tw.config.fileExtensionInfo[type].type];
|
|
}
|
|
if(!Parser) {
|
|
Parser = this.parsers[options.defaultType || "text/vnd.tiddlywiki"];
|
|
}
|
|
if(!Parser) {
|
|
return null;
|
|
}
|
|
// Return the parser instance
|
|
return new Parser(type,text,{
|
|
parseAsInline: options.parseAsInline,
|
|
wiki: this
|
|
});
|
|
};
|
|
|
|
/*
|
|
Parse a tiddler according to its MIME type
|
|
*/
|
|
exports.parseTiddler = function(title,options) {
|
|
options = options || {};
|
|
var cacheType = options.parseAsInline ? "newInlineParseTree" : "newBlockParseTree",
|
|
tiddler = this.getTiddler(title),
|
|
self = this;
|
|
return tiddler ? this.getCacheForTiddler(title,cacheType,function() {
|
|
return self.parseText(tiddler.fields.type,tiddler.fields.text,options);
|
|
}) : null;
|
|
};
|
|
|
|
/*
|
|
Parse text in a specified format and render it into another format
|
|
outputType: content type for the output
|
|
textType: content type of the input text
|
|
text: input text
|
|
*/
|
|
exports.renderText = function(outputType,textType,text) {
|
|
var parser = this.parseText(textType,text),
|
|
renderTree = new $tw.WikiRenderTree(parser,{wiki: this});
|
|
renderTree.execute();
|
|
return renderTree.render(outputType);
|
|
};
|
|
|
|
/*
|
|
Parse text from a tiddler and render it into another format
|
|
outputType: content type for the output
|
|
title: title of the tiddler to be rendered
|
|
*/
|
|
exports.renderTiddler = function(outputType,title,renderContext) {
|
|
var parser = this.parseTiddler(title),
|
|
renderTree = new $tw.WikiRenderTree(parser,{wiki: this});
|
|
renderTree.execute(renderContext);
|
|
return renderTree.render(outputType);
|
|
};
|
|
|
|
/*
|
|
Select the appropriate saver modules and set them up
|
|
*/
|
|
exports.initSavers = function(moduleType) {
|
|
moduleType = moduleType || "saver";
|
|
// Instantiate the available savers
|
|
this.savers = [];
|
|
var self = this;
|
|
$tw.modules.forEachModuleOfType(moduleType,function(title,module) {
|
|
if(module.canSave(self)) {
|
|
self.savers.push(module.create(self));
|
|
}
|
|
});
|
|
// Sort the savers into priority order
|
|
this.savers.sort(function(a,b) {
|
|
if(a.info.priority < b.info.priority) {
|
|
return -1;
|
|
} else {
|
|
if(a.info.priority > b.info.priority) {
|
|
return +1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
};
|
|
|
|
/*
|
|
Invoke the highest priority saver that successfully handles a method
|
|
*/
|
|
exports.callSaver = function(method /*, args */ ) {
|
|
for(var t=this.savers.length-1; t>=0; t--) {
|
|
var saver = this.savers[t];
|
|
if(saver[method].apply(saver,Array.prototype.slice.call(arguments,1))) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/*
|
|
Save the wiki contents. Options are:
|
|
template: the tiddler containing the template to save
|
|
downloadType: the content type for the saved file
|
|
*/
|
|
exports.saveWiki = function(options) {
|
|
options = options || {};
|
|
var template = options.template || "$:/core/templates/tiddlywiki5.template.html",
|
|
downloadType = options.downloadType || "text/plain";
|
|
var text = this.renderTiddler(downloadType,template);
|
|
this.callSaver("save",text);
|
|
};
|
|
|
|
/*
|
|
Return an array of tiddler titles that match a search string
|
|
text: The text string to search for
|
|
options: see below
|
|
Options available:
|
|
titles: Hashmap or array of tiddler titles to limit search
|
|
exclude: An array of tiddler titles to exclude from the search
|
|
invert: If true returns tiddlers that do not contain the specified string
|
|
caseSensitive: If true forces a case sensitive search
|
|
literal: If true, searches for literal string, rather than separate search terms
|
|
*/
|
|
exports.search = function(text,options) {
|
|
options = options || {};
|
|
var self = this,t;
|
|
// Convert the search string into a regexp for each term
|
|
var terms, searchTermsRegExps,
|
|
flags = options.caseSensitive ? "" : "i";
|
|
if(options.literal) {
|
|
if(text.length === 0) {
|
|
return [];
|
|
}
|
|
searchTermsRegExps = [new RegExp("(" + $tw.utils.escapeRegExp(text) + ")",flags)];
|
|
} else {
|
|
terms = text.replace(/( +)/g," ").split(" ");
|
|
searchTermsRegExps = [];
|
|
if(terms.length === 0) {
|
|
return [];
|
|
}
|
|
for(t=0; t<terms.length; t++) {
|
|
searchTermsRegExps.push(new RegExp("(" + $tw.utils.escapeRegExp(terms[t]) + ")",flags));
|
|
}
|
|
}
|
|
// Function to check a given tiddler for the search term
|
|
var searchTiddler = function(title) {
|
|
var tiddler = self.getTiddler(title);
|
|
if(!tiddler) {
|
|
return !!options.invert;
|
|
}
|
|
var contentTypeInfo = $tw.config.contentTypeInfo[tiddler.fields.type];
|
|
if(contentTypeInfo ? contentTypeInfo.encoding === "utf8" : true) {
|
|
var match = true;
|
|
for(var t=0; t<searchTermsRegExps.length; t++) {
|
|
// Search title and body
|
|
if(match) {
|
|
match = searchTermsRegExps[t].test(tiddler.fields.title) || searchTermsRegExps[t].test(tiddler.fields.text);
|
|
}
|
|
}
|
|
return options.invert ? !match : match;
|
|
}
|
|
return false;
|
|
};
|
|
// Loop through all the tiddlers doing the search
|
|
var results = [];
|
|
if($tw.utils.isArray(options.titles)) {
|
|
for(t=0; t<options.titles.length; t++) {
|
|
if(searchTiddler(options.titles[t])) {
|
|
results.push(options.titles[t]);
|
|
}
|
|
}
|
|
} else {
|
|
var source = options.titles || this.tiddlers;
|
|
for(t in source) {
|
|
if(searchTiddler(t)) {
|
|
results.push(t);
|
|
}
|
|
}
|
|
}
|
|
// Remove any of the results we have to exclude
|
|
if(options.exclude) {
|
|
for(t=0; t<options.exclude.length; t++) {
|
|
var p = results.indexOf(options.exclude[t]);
|
|
if(p !== -1) {
|
|
results.splice(p,1);
|
|
}
|
|
}
|
|
}
|
|
return results;
|
|
};
|
|
|
|
/*
|
|
Trigger a load for a tiddler if it is skinny. Returns the text, or undefined if the tiddler is missing, null if the tiddler is being lazily loaded.
|
|
*/
|
|
exports.getTiddlerText = function(title,defaultText) {
|
|
var tiddler = this.getTiddler(title);
|
|
// Return undefined if the tiddler isn't found
|
|
if(!tiddler) {
|
|
return defaultText;
|
|
}
|
|
if(tiddler.fields.text !== undefined) {
|
|
// Just return the text if we've got it
|
|
return tiddler.fields.text;
|
|
} else {
|
|
// Tell any listeners about the need to lazily load this tiddler
|
|
this.dispatchEvent("lazyLoad",title);
|
|
// Indicate that the text is being loaded
|
|
return null;
|
|
}
|
|
};
|
|
|
|
})();
|