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mirror of https://github.com/Jermolene/TiddlyWiki5 synced 2024-12-11 18:50:28 +00:00
TiddlyWiki5/core/modules/wiki.js
lin onetwo 36fc8170a4
Basic Backtranscludes filter (#6081)
* feat: add transcludes and backtranscludes filter and its relying indexer

* feat: add test about backtranscludes

* docs: add doc about transcludes and backtranscludes Operator

* refactor: merge backlinks and backtranscludes indexer

* fix: test not executed

* fix: latest transclude use $tiddler instead of tiddler

* feat: A tiddler transclude with template will still use the tiddler as result.

* docs: wrong comment
2024-02-18 09:14:23 +00:00

1768 lines
54 KiB
JavaScript
Executable File

/*\
title: $:/core/modules/wiki.js
type: application/javascript
module-type: wikimethod
Extension methods for the $tw.Wiki object
Adds the following properties to the wiki object:
* `eventListeners` is a hashmap by type of arrays of listener functions
* `changedTiddlers` is a hashmap describing changes to named tiddlers since wiki change events were last dispatched. Each entry is a hashmap containing two fields:
modified: true/false
deleted: true/false
* `changeCount` is a hashmap by tiddler title containing a numerical index that starts at zero and is incremented each time a tiddler is created changed or deleted
* `caches` is a hashmap by tiddler title containing a further hashmap of named cache objects. Caches are automatically cleared when a tiddler is modified or deleted
* `globalCache` is a hashmap by cache name of cache objects that are cleared whenever any tiddler change occurs
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
var widget = require("$:/core/modules/widgets/widget.js");
var USER_NAME_TITLE = "$:/status/UserName",
TIMESTAMP_DISABLE_TITLE = "$:/config/TimestampDisable";
/*
Add available indexers to this wiki
*/
exports.addIndexersToWiki = function() {
var self = this;
$tw.utils.each($tw.modules.applyMethods("indexer"),function(Indexer,name) {
self.addIndexer(new Indexer(self),name);
});
};
/*
Get the value of a text reference. Text references can have any of these forms:
<tiddlertitle>
<tiddlertitle>!!<fieldname>
!!<fieldname> - specifies a field of the current tiddlers
<tiddlertitle>##<index>
*/
exports.getTextReference = function(textRef,defaultText,currTiddlerTitle) {
var tr = $tw.utils.parseTextReference(textRef),
title = tr.title || currTiddlerTitle;
if(tr.field) {
var tiddler = this.getTiddler(title);
if(tr.field === "title") { // Special case so we can return the title of a non-existent tiddler
return title || defaultText;
} else if(tiddler && $tw.utils.hop(tiddler.fields,tr.field)) {
return tiddler.getFieldString(tr.field);
} else {
return defaultText;
}
} else if(tr.index) {
return this.extractTiddlerDataItem(title,tr.index,defaultText);
} else {
return this.getTiddlerText(title,defaultText);
}
};
exports.setTextReference = function(textRef,value,currTiddlerTitle) {
var tr = $tw.utils.parseTextReference(textRef),
title = tr.title || currTiddlerTitle;
this.setText(title,tr.field,tr.index,value);
};
exports.setText = function(title,field,index,value,options) {
options = options || {};
var creationFields = options.suppressTimestamp ? {} : this.getCreationFields(),
modificationFields = options.suppressTimestamp ? {} : this.getModificationFields();
// Check if it is a reference to a tiddler field
if(index) {
var data = this.getTiddlerData(title,Object.create(null));
if(value !== undefined) {
data[index] = value;
} else {
delete data[index];
}
this.setTiddlerData(title,data,{},{suppressTimestamp: options.suppressTimestamp});
} else {
var tiddler = this.getTiddler(title),
fields = {title: title};
fields[field || "text"] = value;
this.addTiddler(new $tw.Tiddler(creationFields,tiddler,fields,modificationFields));
}
};
exports.deleteTextReference = function(textRef,currTiddlerTitle) {
var tr = $tw.utils.parseTextReference(textRef),
title,tiddler,fields;
// Check if it is a reference to a tiddler
if(tr.title && !tr.field) {
this.deleteTiddler(tr.title);
// Else check for a field reference
} else if(tr.field) {
title = tr.title || currTiddlerTitle;
tiddler = this.getTiddler(title);
if(tiddler && $tw.utils.hop(tiddler.fields,tr.field)) {
fields = Object.create(null);
fields[tr.field] = undefined;
this.addTiddler(new $tw.Tiddler(tiddler,fields,this.getModificationFields()));
}
}
};
exports.addEventListener = function(type,listener) {
this.eventListeners = this.eventListeners || {};
this.eventListeners[type] = this.eventListeners[type] || [];
this.eventListeners[type].push(listener);
};
exports.removeEventListener = function(type,listener) {
var listeners = this.eventListeners[type];
if(listeners) {
var p = listeners.indexOf(listener);
if(p !== -1) {
listeners.splice(p,1);
}
}
};
exports.dispatchEvent = function(type /*, args */) {
var args = Array.prototype.slice.call(arguments,1),
listeners = this.eventListeners[type];
if(listeners) {
for(var p=0; p<listeners.length; p++) {
var listener = listeners[p];
listener.apply(listener,args);
}
}
};
/*
Causes a tiddler to be marked as changed, incrementing the change count, and triggers event handlers.
This method should be called after the changes it describes have been made to the wiki.tiddlers[] array.
title: Title of tiddler
isDeleted: defaults to false (meaning the tiddler has been created or modified),
true if the tiddler has been deleted
*/
exports.enqueueTiddlerEvent = function(title,isDeleted) {
// Record the touch in the list of changed tiddlers
this.changedTiddlers = this.changedTiddlers || Object.create(null);
this.changedTiddlers[title] = this.changedTiddlers[title] || Object.create(null);
this.changedTiddlers[title][isDeleted ? "deleted" : "modified"] = true;
// Increment the change count
this.changeCount = this.changeCount || Object.create(null);
if($tw.utils.hop(this.changeCount,title)) {
this.changeCount[title]++;
} else {
this.changeCount[title] = 1;
}
// Trigger events
this.eventListeners = this.eventListeners || {};
if(!this.eventsTriggered) {
var self = this;
$tw.utils.nextTick(function() {
var changes = self.changedTiddlers;
self.changedTiddlers = Object.create(null);
self.eventsTriggered = false;
if($tw.utils.count(changes) > 0) {
self.dispatchEvent("change",changes);
}
});
this.eventsTriggered = true;
}
};
exports.getSizeOfTiddlerEventQueue = function() {
return $tw.utils.count(this.changedTiddlers);
};
exports.clearTiddlerEventQueue = function() {
this.changedTiddlers = Object.create(null);
this.changeCount = Object.create(null);
};
exports.getChangeCount = function(title) {
this.changeCount = this.changeCount || Object.create(null);
if($tw.utils.hop(this.changeCount,title)) {
return this.changeCount[title];
} else {
return 0;
}
};
/*
Generate an unused title from the specified base
options.prefix must be a string
*/
exports.generateNewTitle = function(baseTitle,options) {
options = options || {};
var c = 0,
title = baseTitle,
template = options.template,
prefix = (typeof(options.prefix) === "string") ? options.prefix : " ";
if (template) {
// "count" is important to avoid an endless loop in while(...)!!
template = (/\$count:?(\d+)?\$/i.test(template)) ? template : template + "$count$";
title = $tw.utils.formatTitleString(template,{"base":baseTitle,"separator":prefix,"counter":c});
while(this.tiddlerExists(title) || this.isShadowTiddler(title) || this.findDraft(title)) {
title = $tw.utils.formatTitleString(template,{"base":baseTitle,"separator":prefix,"counter":(++c)});
}
} else {
while(this.tiddlerExists(title) || this.isShadowTiddler(title) || this.findDraft(title)) {
title = baseTitle + prefix + (++c);
}
}
return title;
};
exports.isSystemTiddler = function(title) {
return title && title.indexOf("$:/") === 0;
};
exports.isTemporaryTiddler = function(title) {
return title && title.indexOf("$:/temp/") === 0;
};
exports.isVolatileTiddler = function(title) {
return title && title.indexOf("$:/temp/volatile/") === 0;
};
exports.isImageTiddler = function(title) {
var tiddler = this.getTiddler(title);
if(tiddler) {
var contentTypeInfo = $tw.config.contentTypeInfo[tiddler.fields.type || "text/vnd.tiddlywiki"];
return !!contentTypeInfo && contentTypeInfo.flags.indexOf("image") !== -1;
} else {
return null;
}
};
exports.isBinaryTiddler = function(title) {
var tiddler = this.getTiddler(title);
if(tiddler) {
var contentTypeInfo = $tw.config.contentTypeInfo[tiddler.fields.type || "text/vnd.tiddlywiki"];
return !!contentTypeInfo && contentTypeInfo.encoding === "base64";
} else {
return null;
}
};
/*
Like addTiddler() except it will silently reject any plugin tiddlers that are older than the currently loaded version. Returns true if the tiddler was imported
*/
exports.importTiddler = function(tiddler) {
var existingTiddler = this.getTiddler(tiddler.fields.title);
// Check if we're dealing with a plugin
if(tiddler && tiddler.hasField("plugin-type") && tiddler.hasField("version") && existingTiddler && existingTiddler.hasField("plugin-type") && existingTiddler.hasField("version")) {
// Reject the incoming plugin if it is older
if(!$tw.utils.checkVersions(tiddler.fields.version,existingTiddler.fields.version)) {
return false;
}
}
// Fall through to adding the tiddler
this.addTiddler(tiddler);
return true;
};
/*
Return a hashmap of the fields that should be set when a tiddler is created
*/
exports.getCreationFields = function() {
if(this.getTiddlerText(TIMESTAMP_DISABLE_TITLE,"").toLowerCase() !== "yes") {
var fields = {
created: new Date()
},
creator = this.getTiddlerText(USER_NAME_TITLE);
if(creator) {
fields.creator = creator;
}
return fields;
} else {
return {};
}
};
/*
Return a hashmap of the fields that should be set when a tiddler is modified
*/
exports.getModificationFields = function() {
if(this.getTiddlerText(TIMESTAMP_DISABLE_TITLE,"").toLowerCase() !== "yes") {
var fields = Object.create(null),
modifier = this.getTiddlerText(USER_NAME_TITLE);
fields.modified = new Date();
if(modifier) {
fields.modifier = modifier;
}
return fields;
} else {
return {};
}
};
/*
Return a sorted array of tiddler titles. Options include:
sortField: field to sort by
excludeTag: tag to exclude
includeSystem: whether to include system tiddlers (defaults to false)
*/
exports.getTiddlers = function(options) {
options = options || Object.create(null);
var self = this,
sortField = options.sortField || "title",
tiddlers = [], t, titles = [];
this.each(function(tiddler,title) {
if(options.includeSystem || !self.isSystemTiddler(title)) {
if(!options.excludeTag || !tiddler.hasTag(options.excludeTag)) {
tiddlers.push(tiddler);
}
}
});
tiddlers.sort(function(a,b) {
var aa = a.fields[sortField].toLowerCase() || "",
bb = b.fields[sortField].toLowerCase() || "";
if(aa < bb) {
return -1;
} else {
if(aa > bb) {
return 1;
} else {
return 0;
}
}
});
for(t=0; t<tiddlers.length; t++) {
titles.push(tiddlers[t].fields.title);
}
return titles;
};
exports.countTiddlers = function(excludeTag) {
var tiddlers = this.getTiddlers({excludeTag: excludeTag});
return $tw.utils.count(tiddlers);
};
/*
Returns a function iterator(callback) that iterates through the specified titles, and invokes the callback with callback(tiddler,title)
*/
exports.makeTiddlerIterator = function(titles) {
var self = this;
if(!$tw.utils.isArray(titles)) {
titles = Object.keys(titles);
} else {
titles = titles.slice(0);
}
return function(callback) {
titles.forEach(function(title) {
callback(self.getTiddler(title),title);
});
};
};
/*
Sort an array of tiddler titles by a specified field
titles: array of titles (sorted in place)
sortField: name of field to sort by
isDescending: true if the sort should be descending
isCaseSensitive: true if the sort should consider upper and lower case letters to be different
*/
exports.sortTiddlers = function(titles,sortField,isDescending,isCaseSensitive,isNumeric,isAlphaNumeric) {
var self = this;
if(sortField === "title") {
if(!isNumeric && !isAlphaNumeric) {
if(isCaseSensitive) {
if(isDescending) {
titles.sort(function(a,b) {
return b.localeCompare(a);
});
} else {
titles.sort(function(a,b) {
return a.localeCompare(b);
});
}
} else {
if(isDescending) {
titles.sort(function(a,b) {
return b.toLowerCase().localeCompare(a.toLowerCase());
});
} else {
titles.sort(function(a,b) {
return a.toLowerCase().localeCompare(b.toLowerCase());
});
}
}
} else {
titles.sort(function(a,b) {
var x,y;
if(isNumeric) {
x = Number(a);
y = Number(b);
if(isNaN(x)) {
if(isNaN(y)) {
// If neither value is a number then fall through to a textual comparison
} else {
return isDescending ? -1 : 1;
}
} else {
if(isNaN(y)) {
return isDescending ? 1 : -1;
} else {
return isDescending ? y - x : x - y;
}
}
}
if(isAlphaNumeric) {
return isDescending ? b.localeCompare(a,undefined,{numeric: true,sensitivity: "base"}) : a.localeCompare(b,undefined,{numeric: true,sensitivity: "base"});
}
if(!isCaseSensitive) {
a = a.toLowerCase();
b = b.toLowerCase();
}
return isDescending ? b.localeCompare(a) : a.localeCompare(b);
});
}
} else {
titles.sort(function(a,b) {
var x,y;
if(sortField !== "title") {
var tiddlerA = self.getTiddler(a),
tiddlerB = self.getTiddler(b);
if(tiddlerA) {
a = tiddlerA.fields[sortField] || "";
} else {
a = "";
}
if(tiddlerB) {
b = tiddlerB.fields[sortField] || "";
} else {
b = "";
}
}
if(isNumeric) {
x = Number(a);
y = Number(b);
if(isNaN(x)) {
if(isNaN(y)) {
// If neither value is a number then fall through to a textual comparison
} else {
return isDescending ? -1 : 1;
}
} else {
if(isNaN(y)) {
return isDescending ? 1 : -1;
} else {
return isDescending ? y - x : x - y;
}
}
}
if(Object.prototype.toString.call(a) === "[object Date]" && Object.prototype.toString.call(b) === "[object Date]") {
return isDescending ? b - a : a - b;
}
a = String(a);
b = String(b);
if(isAlphaNumeric) {
return isDescending ? b.localeCompare(a,undefined,{numeric: true,sensitivity: "base"}) : a.localeCompare(b,undefined,{numeric: true,sensitivity: "base"});
}
if(!isCaseSensitive) {
a = a.toLowerCase();
b = b.toLowerCase();
}
return isDescending ? b.localeCompare(a) : a.localeCompare(b);
});
}
};
/*
For every tiddler invoke a callback(title,tiddler) with `this` set to the wiki object. Options include:
sortField: field to sort by
excludeTag: tag to exclude
includeSystem: whether to include system tiddlers (defaults to false)
*/
exports.forEachTiddler = function(/* [options,]callback */) {
var arg = 0,
options = arguments.length >= 2 ? arguments[arg++] : {},
callback = arguments[arg++],
titles = this.getTiddlers(options),
t, tiddler;
for(t=0; t<titles.length; t++) {
tiddler = this.getTiddler(titles[t]);
if(tiddler) {
callback.call(this,tiddler.fields.title,tiddler);
}
}
};
/*
Return an array of tiddler titles that are directly linked within the given parse tree
*/
exports.extractLinks = function(parseTreeRoot) {
// Count up the links
var links = [],
checkParseTree = function(parseTree) {
for(var t=0; t<parseTree.length; t++) {
var parseTreeNode = parseTree[t];
if(parseTreeNode.type === "link" && parseTreeNode.attributes.to && parseTreeNode.attributes.to.type === "string") {
var value = parseTreeNode.attributes.to.value;
if(links.indexOf(value) === -1) {
links.push(value);
}
}
if(parseTreeNode.children) {
checkParseTree(parseTreeNode.children);
}
}
};
checkParseTree(parseTreeRoot);
return links;
};
/*
Return an array of tiddler titles that are directly linked from the specified tiddler
*/
exports.getTiddlerLinks = function(title) {
var self = this;
// We'll cache the links so they only get computed if the tiddler changes
return this.getCacheForTiddler(title,"links",function() {
// Parse the tiddler
var parser = self.parseTiddler(title);
if(parser) {
return self.extractLinks(parser.tree);
}
return [];
});
};
/*
Return an array of tiddler titles that link to the specified tiddler
*/
exports.getTiddlerBacklinks = function(targetTitle) {
var self = this,
backIndexer = this.getIndexer("BackIndexer"),
backlinks = backIndexer && backIndexer.subIndexers.link.lookup(targetTitle);
if(!backlinks) {
backlinks = [];
this.forEachTiddler(function(title,tiddler) {
var links = self.getTiddlerLinks(title);
if(links.indexOf(targetTitle) !== -1) {
backlinks.push(title);
}
});
}
return backlinks;
};
/*
Return an array of tiddler titles that are directly transcluded within the given parse tree
*/
exports.extractTranscludes = function(parseTreeRoot) {
// 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" && 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") {
value = parentNode.attributes.tiddler.value;
} else {
value = parseTreeNode.attributes.$tiddler.value;
}
if(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) {
return self.extractTranscludes(parser.tree);
}
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
*/
exports.getMissingTitles = function() {
var self = this,
missing = [];
// We should cache the missing tiddler list, even if we recreate it every time any tiddler is modified
this.forEachTiddler(function(title,tiddler) {
var links = self.getTiddlerLinks(title);
$tw.utils.each(links,function(link) {
if((!self.tiddlerExists(link) && !self.isShadowTiddler(link)) && missing.indexOf(link) === -1) {
missing.push(link);
}
});
});
return missing;
};
exports.getOrphanTitles = function() {
var self = this,
orphans = this.getTiddlers();
this.forEachTiddler(function(title,tiddler) {
var links = self.getTiddlerLinks(title);
$tw.utils.each(links,function(link) {
var p = orphans.indexOf(link);
if(p !== -1) {
orphans.splice(p,1);
}
});
});
return orphans; // Todo
};
/*
Retrieves a list of the tiddler titles that are tagged with a given tag
*/
exports.getTiddlersWithTag = function(tag) {
// Try to use the indexer
var self = this,
tagIndexer = this.getIndexer("TagIndexer"),
results = tagIndexer && tagIndexer.subIndexers[3].lookup(tag);
if(!results) {
// If not available, perform a manual scan
results = this.getGlobalCache("taglist-" + tag,function() {
var tagmap = self.getTagMap();
return self.sortByList(tagmap[tag],tag);
});
}
return results;
};
/*
Get a hashmap by tag of arrays of tiddler titles
*/
exports.getTagMap = function() {
var self = this;
return this.getGlobalCache("tagmap",function() {
var tags = Object.create(null),
storeTags = function(tagArray,title) {
if(tagArray) {
for(var index=0; index<tagArray.length; index++) {
var tag = tagArray[index];
if($tw.utils.hop(tags,tag)) {
tags[tag].push(title);
} else {
tags[tag] = [title];
}
}
}
},
title, tiddler;
// Collect up all the tags
self.eachShadow(function(tiddler,title) {
if(!self.tiddlerExists(title)) {
tiddler = self.getTiddler(title);
storeTags(tiddler.fields.tags,title);
}
});
self.each(function(tiddler,title) {
storeTags(tiddler.fields.tags,title);
});
return tags;
});
};
/*
Lookup a given tiddler and return a list of all the tiddlers that include it in the specified list field
*/
exports.findListingsOfTiddler = function(targetTitle,fieldName) {
fieldName = fieldName || "list";
var wiki = this;
var listings = this.getGlobalCache("listings-" + fieldName,function() {
var listings = Object.create(null);
wiki.each(function(tiddler,title) {
var list = $tw.utils.parseStringArray(tiddler.fields[fieldName]);
if(list) {
for(var i = 0; i < list.length; i++) {
var listItem = list[i],
listing = listings[listItem] || [];
if (listing.indexOf(title) === -1) {
listing.push(title);
}
listings[listItem] = listing;
}
}
});
return listings;
});
return listings[targetTitle] || [];
};
/*
Sorts an array of tiddler titles according to an ordered list
*/
exports.sortByList = function(array,listTitle) {
var self = this,
replacedTitles = Object.create(null);
// Given a title, this function will place it in the correct location
// within titles.
function moveItemInList(title) {
if(!$tw.utils.hop(replacedTitles, title)) {
replacedTitles[title] = true;
var newPos = -1,
tiddler = self.getTiddler(title);
if(tiddler) {
var beforeTitle = tiddler.fields["list-before"],
afterTitle = tiddler.fields["list-after"];
if(beforeTitle === "") {
newPos = 0;
} else if(afterTitle === "") {
newPos = titles.length;
} else if(beforeTitle) {
// if this title is placed relative
// to another title, make sure that
// title is placed before we place
// this one.
moveItemInList(beforeTitle);
newPos = titles.indexOf(beforeTitle);
} else if(afterTitle) {
// Same deal
moveItemInList(afterTitle);
newPos = titles.indexOf(afterTitle);
if(newPos >= 0) {
++newPos;
}
}
// If a new position is specified, let's move it
if (newPos !== -1) {
// get its current Pos, and make sure
// sure that it's _actually_ in the list
// and that it would _actually_ move
// (#4275) We don't bother calling
// indexOf unless we have a new
// position to work with
var currPos = titles.indexOf(title);
if(currPos >= 0 && newPos !== currPos) {
// move it!
titles.splice(currPos,1);
if(newPos >= currPos) {
newPos--;
}
titles.splice(newPos,0,title);
}
}
}
}
}
var list = this.getTiddlerList(listTitle);
if(!array || array.length === 0) {
return [];
} else {
var titles = [], t, title;
// First place any entries that are present in the list
for(t=0; t<list.length; t++) {
title = list[t];
if(array.indexOf(title) !== -1) {
titles.push(title);
}
}
// Then place any remaining entries
for(t=0; t<array.length; t++) {
title = array[t];
if(list.indexOf(title) === -1) {
titles.push(title);
}
}
// Finally obey the list-before and list-after fields of each tiddler in turn
var sortedTitles = titles.slice(0);
for(t=0; t<sortedTitles.length; t++) {
title = sortedTitles[t];
moveItemInList(title);
}
return titles;
}
};
exports.getSubTiddler = function(title,subTiddlerTitle) {
var bundleInfo = this.getPluginInfo(title) || this.getTiddlerDataCached(title);
if(bundleInfo && bundleInfo.tiddlers) {
var subTiddler = bundleInfo.tiddlers[subTiddlerTitle];
if(subTiddler) {
return new $tw.Tiddler(subTiddler);
}
}
return null;
};
/*
Retrieve a tiddler as a JSON string of the fields
*/
exports.getTiddlerAsJson = function(title) {
var tiddler = this.getTiddler(title);
if(tiddler) {
var fields = Object.create(null);
$tw.utils.each(tiddler.fields,function(value,name) {
fields[name] = tiddler.getFieldString(name);
});
return JSON.stringify(fields);
} else {
return JSON.stringify({title: title});
}
};
exports.getTiddlersAsJson = function(filter,spaces) {
var tiddlers = this.filterTiddlers(filter),
spaces = (spaces === undefined) ? $tw.config.preferences.jsonSpaces : spaces,
data = [];
for(var t=0;t<tiddlers.length; t++) {
var tiddler = this.getTiddler(tiddlers[t]);
if(tiddler) {
var fields = new Object();
for(var field in tiddler.fields) {
fields[field] = tiddler.getFieldString(field);
}
data.push(fields);
}
}
return JSON.stringify(data,null,spaces);
};
/*
Get the content of a tiddler as a JavaScript object. How this is done depends on the type of the tiddler:
application/json: the tiddler JSON is parsed into an object
application/x-tiddler-dictionary: the tiddler is parsed as sequence of name:value pairs
Other types currently just return null.
titleOrTiddler: string tiddler title or a tiddler object
defaultData: default data to be returned if the tiddler is missing or doesn't contain data
Note that the same value is returned for repeated calls for the same tiddler data. The value is frozen to prevent modification; otherwise modifications would be visible to all callers
*/
exports.getTiddlerDataCached = function(titleOrTiddler,defaultData) {
var self = this,
tiddler = titleOrTiddler;
if(!(tiddler instanceof $tw.Tiddler)) {
tiddler = this.getTiddler(tiddler);
}
if(tiddler) {
return this.getCacheForTiddler(tiddler.fields.title,"data",function() {
// Return the frozen value
var value = self.getTiddlerData(tiddler.fields.title,undefined);
$tw.utils.deepFreeze(value);
return value;
}) || defaultData;
} else {
return defaultData;
}
};
/*
Alternative, uncached version of getTiddlerDataCached(). The return value can be mutated freely and reused
*/
exports.getTiddlerData = function(titleOrTiddler,defaultData) {
var tiddler = titleOrTiddler,
data;
if(!(tiddler instanceof $tw.Tiddler)) {
tiddler = this.getTiddler(tiddler);
}
if(tiddler && tiddler.fields.text) {
switch(tiddler.fields.type) {
case "application/json":
// JSON tiddler
return $tw.utils.parseJSONSafe(tiddler.fields.text,defaultData);
case "application/x-tiddler-dictionary":
return $tw.utils.parseFields(tiddler.fields.text);
}
}
return defaultData;
};
/*
Extract an indexed field from within a data tiddler
*/
exports.extractTiddlerDataItem = function(titleOrTiddler,index,defaultText) {
var data = this.getTiddlerDataCached(titleOrTiddler,Object.create(null)),
text;
if(data && $tw.utils.hop(data,index)) {
text = data[index];
}
if(typeof text === "string" || typeof text === "number") {
return text.toString();
} else {
return defaultText;
}
};
/*
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.
title: title of tiddler
data: object that can be serialised to JSON
fields: optional hashmap of additional tiddler fields to be set
options: optional hashmap of options including:
suppressTimestamp: if true, don't set the creation/modification timestamps
*/
exports.setTiddlerData = function(title,data,fields,options) {
options = options || {};
var existingTiddler = this.getTiddler(title),
creationFields = options.suppressTimestamp ? {} : this.getCreationFields(),
modificationFields = options.suppressTimestamp ? {} : this.getModificationFields(),
newFields = {
title: title
};
if(existingTiddler && existingTiddler.fields.type === "application/x-tiddler-dictionary") {
newFields.text = $tw.utils.makeTiddlerDictionary(data);
} else {
newFields.type = "application/json";
newFields.text = JSON.stringify(data,null,$tw.config.preferences.jsonSpaces);
}
this.addTiddler(new $tw.Tiddler(creationFields,existingTiddler,fields,newFields,modificationFields));
};
/*
Return the content of a tiddler as an array containing each line
*/
exports.getTiddlerList = function(title,field,index) {
if(index) {
return $tw.utils.parseStringArray(this.extractTiddlerDataItem(title,index,""));
}
field = field || "list";
var tiddler = this.getTiddler(title);
if(tiddler) {
return ($tw.utils.parseStringArray(tiddler.fields[field]) || []).slice(0);
}
return [];
};
// Return a named global cache object. Global cache objects are cleared whenever a tiddler change occurs
exports.getGlobalCache = function(cacheName,initializer) {
this.globalCache = this.globalCache || Object.create(null);
if($tw.utils.hop(this.globalCache,cacheName)) {
return this.globalCache[cacheName];
} else {
this.globalCache[cacheName] = initializer();
return this.globalCache[cacheName];
}
};
exports.clearGlobalCache = function() {
this.globalCache = Object.create(null);
};
// Return the named cache object for a tiddler. If the cache doesn't exist then the initializer function is invoked to create it
exports.getCacheForTiddler = function(title,cacheName,initializer) {
this.caches = this.caches || Object.create(null);
var caches = this.caches[title];
if(caches && caches[cacheName] !== undefined) {
return caches[cacheName];
} else {
if(!caches) {
caches = Object.create(null);
this.caches[title] = caches;
}
caches[cacheName] = initializer();
return caches[cacheName];
}
};
// Clear all caches associated with a particular tiddler, or, if the title is null, clear all the caches for all the tiddlers
exports.clearCache = function(title) {
if(title) {
this.caches = this.caches || Object.create(null);
if($tw.utils.hop(this.caches,title)) {
delete this.caches[title];
}
} else {
this.caches = Object.create(null);
}
};
exports.initParsers = function(moduleType) {
// Install the parser modules
$tw.Wiki.parsers = {};
var self = this;
$tw.modules.forEachModuleOfType("parser",function(title,module) {
for(var f in module) {
if($tw.utils.hop(module,f)) {
$tw.Wiki.parsers[f] = module[f]; // Store the parser class
}
}
});
// Use the generic binary parser for any binary types not registered so far
if($tw.Wiki.parsers["application/octet-stream"]) {
Object.keys($tw.config.contentTypeInfo).forEach(function(type) {
if(!$tw.utils.hop($tw.Wiki.parsers,type) && $tw.config.contentTypeInfo[type].encoding === "base64") {
$tw.Wiki.parsers[type] = $tw.Wiki.parsers["application/octet-stream"];
}
});
}
};
/*
Parse a block of text of a specified MIME type
type: content type of text to be parsed
text: text
options: see below
Options include:
parseAsInline: if true, the text of the tiddler will be parsed as an inline run
_canonical_uri: optional string of the canonical URI of this content
*/
exports.parseText = function(type,text,options) {
text = text || "";
options = options || {};
// Select a parser
var Parser = $tw.Wiki.parsers[type];
if(!Parser && $tw.utils.getFileExtensionInfo(type)) {
Parser = $tw.Wiki.parsers[$tw.utils.getFileExtensionInfo(type).type];
}
if(!Parser) {
Parser = $tw.Wiki.parsers[options.defaultType || "text/vnd.tiddlywiki"];
}
if(!Parser) {
return null;
}
// Return the parser instance
return new Parser(type,text,{
parseAsInline: options.parseAsInline,
wiki: this,
_canonical_uri: options._canonical_uri,
configTrimWhiteSpace: options.configTrimWhiteSpace
});
};
/*
Parse a tiddler according to its MIME type
*/
exports.parseTiddler = function(title,options) {
options = $tw.utils.extend({},options);
var cacheType = options.parseAsInline ? "inlineParseTree" : "blockParseTree",
tiddler = this.getTiddler(title),
self = this;
return tiddler ? this.getCacheForTiddler(title,cacheType,function() {
if(tiddler.hasField("_canonical_uri")) {
options._canonical_uri = tiddler.fields._canonical_uri;
}
return self.parseText(tiddler.fields.type,tiddler.fields.text,options);
}) : null;
};
exports.parseTextReference = function(title,field,index,options) {
var tiddler,
text,
parserInfo;
if(!options.subTiddler) {
tiddler = this.getTiddler(title);
if(field === "text" || (!field && !index)) {
this.getTiddlerText(title); // Force the tiddler to be lazily loaded
return this.parseTiddler(title,options);
}
}
parserInfo = this.getTextReferenceParserInfo(title,field,index,options);
if(parserInfo.sourceText !== null) {
return this.parseText(parserInfo.parserType,parserInfo.sourceText,options);
} else {
return null;
}
};
exports.getTextReferenceParserInfo = function(title,field,index,options) {
var defaultType = options.defaultType || "text/vnd.tiddlywiki",
tiddler,
parserInfo = {
sourceText : null,
parserType : defaultType
};
if(options.subTiddler) {
tiddler = this.getSubTiddler(title,options.subTiddler);
} else {
tiddler = this.getTiddler(title);
}
if(field === "text" || (!field && !index)) {
if(tiddler && tiddler.fields) {
parserInfo.sourceText = tiddler.fields.text || "";
if(tiddler.fields.type) {
parserInfo.parserType = tiddler.fields.type;
}
}
} else if(field) {
if(field === "title") {
parserInfo.sourceText = title;
} else if(tiddler && tiddler.fields) {
parserInfo.sourceText = tiddler.hasField(field) ? tiddler.fields[field].toString() : null;
}
} else if(index) {
this.getTiddlerText(title); // Force the tiddler to be lazily loaded
parserInfo.sourceText = this.extractTiddlerDataItem(tiddler,index,null);
}
if(parserInfo.sourceText === null) {
parserInfo.parserType = null;
}
return parserInfo;
}
/*
Parse a block of text of a specified MIME type
text: text on which to perform substitutions
widget
options: see below
Options include:
substitutions: an optional array of substitutions
*/
exports.getSubstitutedText = function(text,widget,options) {
options = options || {};
text = text || "";
var self = this,
substitutions = options.substitutions || [],
output;
// Evaluate embedded filters and substitute with first result
output = text.replace(/\$\{([\S\s]+?)\}\$/g, function(match,filter) {
return self.filterTiddlers(filter,widget)[0] || "";
});
// Process any substitutions provided in options
$tw.utils.each(substitutions,function(substitute) {
output = $tw.utils.replaceString(output,new RegExp("\\$" + $tw.utils.escapeRegExp(substitute.name) + "\\$","mg"),substitute.value);
});
// Substitute any variable references with their values
return output.replace(/\$\(([^\)\$]+)\)\$/g, function(match,varname) {
return widget.getVariable(varname,{defaultValue: ""})
});
};
/*
Make a widget tree for a parse tree
parser: parser object
options: see below
Options include:
document: optional document to use
variables: hashmap of variables to set
parentWidget: optional parent widget for the root node
*/
exports.makeWidget = function(parser,options) {
options = options || {};
var widgetNode = {
type: "widget",
children: []
},
currWidgetNode = widgetNode;
// Create let variable widget for variables
if($tw.utils.count(options.variables) > 0) {
var letVariableWidget = {
type: "let",
attributes: {
},
children: []
};
$tw.utils.each(options.variables,function(value,name) {
$tw.utils.addAttributeToParseTreeNode(letVariableWidget,name,"" + value);
});
currWidgetNode.children = [letVariableWidget];
currWidgetNode = letVariableWidget;
}
// Add in the supplied parse tree nodes
currWidgetNode.children = parser ? parser.tree : [];
// Create the widget
return new widget.widget(widgetNode,{
wiki: this,
document: options.document || $tw.fakeDocument,
parentWidget: options.parentWidget
});
};
/*
Make a widget tree for transclusion
title: target tiddler title
options: as for wiki.makeWidget() plus:
options.field: optional field to transclude (defaults to "text")
options.mode: transclusion mode "inline" or "block"
options.recursionMarker : optional flag to set a recursion marker, defaults to "yes"
options.children: optional array of children for the transclude widget
options.importVariables: optional importvariables filter string for macros to be included
options.importPageMacros: optional boolean; if true, equivalent to passing "[[$:/core/ui/PageMacros]] [all[shadows+tiddlers]tag[$:/tags/Macro]!has[draft.of]]" to options.importVariables
*/
exports.makeTranscludeWidget = function(title,options) {
options = options || {};
var parseTreeDiv = {tree: [{
type: "element",
tag: "div",
children: []}]},
parseTreeImportVariables = {
type: "importvariables",
attributes: {
filter: {
name: "filter",
type: "string"
}
},
isBlock: false,
children: []},
parseTreeTransclude = {
type: "transclude",
attributes: {
recursionMarker: {
name: "recursionMarker",
type: "string",
value: options.recursionMarker || "yes"
},
tiddler: {
name: "tiddler",
type: "string",
value: title
}
},
isBlock: !options.parseAsInline};
if(options.importVariables || options.importPageMacros) {
if(options.importVariables) {
parseTreeImportVariables.attributes.filter.value = options.importVariables;
} else if(options.importPageMacros) {
parseTreeImportVariables.attributes.filter.value = this.getTiddlerText("$:/core/config/GlobalImportFilter");
}
parseTreeDiv.tree[0].children.push(parseTreeImportVariables);
parseTreeImportVariables.children.push(parseTreeTransclude);
} else {
parseTreeDiv.tree[0].children.push(parseTreeTransclude);
}
if(options.field) {
parseTreeTransclude.attributes.field = {type: "string", value: options.field};
}
if(options.mode) {
parseTreeTransclude.attributes.mode = {type: "string", value: options.mode};
}
if(options.children) {
parseTreeTransclude.children = options.children;
}
return this.makeWidget(parseTreeDiv,options);
};
/*
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
options: see below
Options include:
variables: hashmap of variables to set
parentWidget: optional parent widget for the root node
*/
exports.renderText = function(outputType,textType,text,options) {
options = options || {};
var parser = this.parseText(textType,text,options),
widgetNode = this.makeWidget(parser,options);
var container = $tw.fakeDocument.createElement("div");
widgetNode.render(container,null);
return outputType === "text/html" ? container.innerHTML : container.textContent;
};
/*
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
options: see below
Options include:
variables: hashmap of variables to set
parentWidget: optional parent widget for the root node
*/
exports.renderTiddler = function(outputType,title,options) {
options = options || {};
var parser = this.parseTiddler(title,options),
widgetNode = this.makeWidget(parser,options);
var container = $tw.fakeDocument.createElement("div");
widgetNode.render(container,null);
return outputType === "text/html" ? container.innerHTML : (outputType === "text/plain-formatted" ? container.formattedTextContent : container.textContent);
};
/*
Return an array of tiddler titles that match a search string
text: The text string to search for
options: see below
Options available:
source: an iterator function for the source tiddlers, called source(iterator),
where iterator is called as iterator(tiddler,title)
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
field: If specified, restricts the search to the specified field, or an array of field names
anchored: If true, forces all but regexp searches to be anchored to the start of text
excludeField: If true, the field options are inverted to specify the fields that are not to be searched
The search mode is determined by the first of these boolean flags to be true
literal: searches for literal string
whitespace: same as literal except runs of whitespace are treated as a single space
regexp: treats the search term as a regular expression
words: (default) treats search string as a list of tokens, and matches if all tokens are found,
regardless of adjacency or ordering
some: treats search string as a list of tokens, and matches if at least ONE token is found
*/
exports.search = function(text,options) {
options = options || {};
var self = this,
t,
regExpStr="",
invert = !!options.invert;
// Convert the search string into a regexp for each term
var terms, searchTermsRegExps,
flags = options.caseSensitive ? "" : "i",
anchor = options.anchored ? "^" : "";
if(options.literal) {
if(text.length === 0) {
searchTermsRegExps = null;
} else {
searchTermsRegExps = [new RegExp("(" + anchor + $tw.utils.escapeRegExp(text) + ")",flags)];
}
} else if(options.whitespace) {
terms = [];
$tw.utils.each(text.split(/\s+/g),function(term) {
if(term) {
terms.push($tw.utils.escapeRegExp(term));
}
});
searchTermsRegExps = [new RegExp("(" + anchor + terms.join("\\s+") + ")",flags)];
} else if(options.regexp) {
try {
searchTermsRegExps = [new RegExp("(" + text + ")",flags)];
} catch(e) {
searchTermsRegExps = null;
console.log("Regexp error parsing /(" + text + ")/" + flags + ": ",e);
}
} else if(options.some) {
terms = text.trim().split(/[^\S\xA0]+/);
if(terms.length === 1 && terms[0] === "") {
searchTermsRegExps = null;
} else {
searchTermsRegExps = [];
for(t=0; t<terms.length; t++) {
regExpStr += (t===0) ? anchor + $tw.utils.escapeRegExp(terms[t]) : "|" + anchor + $tw.utils.escapeRegExp(terms[t]);
}
searchTermsRegExps.push(new RegExp("(" + regExpStr + ")",flags));
}
} else { // default: words
terms = text.split(/[^\S\xA0]+/);
if(terms.length === 1 && terms[0] === "") {
searchTermsRegExps = null;
} else {
searchTermsRegExps = [];
for(t=0; t<terms.length; t++) {
searchTermsRegExps.push(new RegExp("(" + anchor + $tw.utils.escapeRegExp(terms[t]) + ")",flags));
}
}
}
// Accumulate the array of fields to be searched or excluded from the search
var fields = [];
if(options.field) {
if($tw.utils.isArray(options.field)) {
$tw.utils.each(options.field,function(fieldName) {
if(fieldName) {
fields.push(fieldName);
}
});
} else {
fields.push(options.field);
}
}
// Use default fields if none specified and we're not excluding fields (excluding fields with an empty field array is the same as searching all fields)
if(fields.length === 0 && !options.excludeField) {
fields.push("title");
fields.push("tags");
fields.push("text");
}
// Function to check a given tiddler for the search term
var searchTiddler = function(title) {
if(!searchTermsRegExps) {
return true;
}
var notYetFound = searchTermsRegExps.slice();
var tiddler = self.getTiddler(title);
if(!tiddler) {
tiddler = new $tw.Tiddler({title: title, text: "", type: "text/vnd.tiddlywiki"});
}
var contentTypeInfo = $tw.config.contentTypeInfo[tiddler.fields.type] || $tw.config.contentTypeInfo["text/vnd.tiddlywiki"],
searchFields;
// Get the list of fields we're searching
if(options.excludeField) {
searchFields = Object.keys(tiddler.fields);
$tw.utils.each(fields,function(fieldName) {
var p = searchFields.indexOf(fieldName);
if(p !== -1) {
searchFields.splice(p,1);
}
});
} else {
searchFields = fields;
}
for(var fieldIndex=0; notYetFound.length>0 && fieldIndex<searchFields.length; fieldIndex++) {
// Don't search the text field if the content type is binary
var fieldName = searchFields[fieldIndex];
if(fieldName === "text" && contentTypeInfo.encoding !== "utf8") {
break;
}
var str = tiddler.fields[fieldName],
t;
if(str) {
if($tw.utils.isArray(str)) {
// If the field value is an array, test each regexp against each field array entry and fail if each regexp doesn't match at least one field array entry
for(var s=0; s<str.length; s++) {
for(t=0; t<notYetFound.length;) {
if(notYetFound[t].test(str[s])) {
notYetFound.splice(t, 1);
} else {
t++;
}
}
}
} else {
// If the field isn't an array, force it to a string and test each regexp against it and fail if any do not match
str = tiddler.getFieldString(fieldName);
for(t=0; t<notYetFound.length;) {
if(notYetFound[t].test(str)) {
notYetFound.splice(t, 1);
} else {
t++;
}
}
}
}
};
return notYetFound.length == 0;
};
// Loop through all the tiddlers doing the search
var results = [],
source = options.source || this.each;
source(function(tiddler,title) {
if(searchTiddler(title) !== invert) {
results.push(title);
}
});
// 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.hasField("_is_skinny")) {
// 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;
}
};
/*
Check whether the text of a tiddler matches a given value. By default, the comparison is case insensitive, and any spaces at either end of the tiddler text is trimmed
*/
exports.checkTiddlerText = function(title,targetText,options) {
options = options || {};
var text = this.getTiddlerText(title,"");
if(!options.noTrim) {
text = text.trim();
}
if(!options.caseSensitive) {
text = text.toLowerCase();
targetText = targetText.toLowerCase();
}
return text === targetText;
}
/*
Execute an action string without an associated context widget
*/
exports.invokeActionString = function(actions,event,variables,options) {
var widget = this.makeWidget(null,{parentWidget: options.parentWidget});
widget.invokeActionString(actions,null,event,variables);
};
/*
Read an array of browser File objects, invoking callback(tiddlerFieldsArray) once they're all read
*/
exports.readFiles = function(files,options) {
var callback;
if(typeof options === "function") {
callback = options;
options = {};
} else {
callback = options.callback;
}
var result = [],
outstanding = files.length,
readFileCallback = function(tiddlerFieldsArray) {
result.push.apply(result,tiddlerFieldsArray);
if(--outstanding === 0) {
callback(result);
}
};
for(var f=0; f<files.length; f++) {
this.readFile(files[f],$tw.utils.extend({},options,{callback: readFileCallback}));
}
return files.length;
};
/*
Read a browser File object, invoking callback(tiddlerFieldsArray) with an array of tiddler fields objects
*/
exports.readFile = function(file,options) {
var callback;
if(typeof options === "function") {
callback = options;
options = {};
} else {
callback = options.callback;
}
// Get the type, falling back to the filename extension
var self = this,
type = file.type;
if(type === "" || !type) {
var dotPos = file.name.lastIndexOf(".");
if(dotPos !== -1) {
var fileExtensionInfo = $tw.utils.getFileExtensionInfo(file.name.substr(dotPos));
if(fileExtensionInfo) {
type = fileExtensionInfo.type;
}
}
}
// Figure out if we're reading a binary file
var contentTypeInfo = $tw.config.contentTypeInfo[type],
isBinary = contentTypeInfo ? contentTypeInfo.encoding === "base64" : false;
// Log some debugging information
if($tw.log.IMPORT) {
console.log("Importing file '" + file.name + "', type: '" + type + "', isBinary: " + isBinary);
}
// Give the hook a chance to process the drag
if($tw.hooks.invokeHook("th-importing-file",{
file: file,
type: type,
isBinary: isBinary,
callback: callback
}) !== true) {
this.readFileContent(file,type,isBinary,options.deserializer,callback);
}
};
/*
Lower level utility to read the content of a browser File object, invoking callback(tiddlerFieldsArray) with an array of tiddler fields objects
*/
exports.readFileContent = function(file,type,isBinary,deserializer,callback) {
var self = this;
// Create the FileReader
var reader = new FileReader();
// Onload
reader.onload = function(event) {
var text = event.target.result,
tiddlerFields = {title: file.name || "Untitled"};
if(isBinary) {
var commaPos = text.indexOf(",");
if(commaPos !== -1) {
text = text.substr(commaPos + 1);
}
}
// Check whether this is an encrypted TiddlyWiki file
var encryptedJson = $tw.utils.extractEncryptedStoreArea(text);
if(encryptedJson) {
// If so, attempt to decrypt it with the current password
$tw.utils.decryptStoreAreaInteractive(encryptedJson,function(tiddlers) {
callback(tiddlers);
});
} else {
// Otherwise, just try to deserialise any tiddlers in the file
callback(self.deserializeTiddlers(type,text,tiddlerFields,{deserializer: deserializer}));
}
};
// Kick off the read
if(isBinary) {
reader.readAsDataURL(file);
} else {
reader.readAsText(file);
}
};
/*
Find any existing draft of a specified tiddler
*/
exports.findDraft = function(targetTitle) {
var draftTitle = undefined;
this.forEachTiddler({includeSystem: true},function(title,tiddler) {
if(tiddler.fields["draft.title"] && tiddler.fields["draft.of"] === targetTitle) {
draftTitle = title;
}
});
return draftTitle;
}
/*
Check whether the specified draft tiddler has been modified.
If the original tiddler doesn't exist, create a vanilla tiddler variable,
to check if additional fields have been added.
*/
exports.isDraftModified = function(title) {
var tiddler = this.getTiddler(title);
if(!tiddler.isDraft()) {
return false;
}
var ignoredFields = ["created", "modified", "title", "draft.title", "draft.of"],
origTiddler = this.getTiddler(tiddler.fields["draft.of"]) || new $tw.Tiddler({text:"", tags:[]}),
titleModified = tiddler.fields["draft.title"] !== tiddler.fields["draft.of"];
return titleModified || !tiddler.isEqual(origTiddler,ignoredFields);
};
/*
Add a new record to the top of the history stack
title: a title string or an array of title strings
fromPageRect: page coordinates of the origin of the navigation
historyTitle: title of history tiddler (defaults to $:/HistoryList)
*/
exports.addToHistory = function(title,fromPageRect,historyTitle) {
var story = new $tw.Story({wiki: this, historyTitle: historyTitle});
story.addToHistory(title,fromPageRect);
console.log("$tw.wiki.addToHistory() is deprecated since V5.1.23! Use the this.story.addToHistory() from the story-object!")
};
/*
Add a new tiddler to the story river
title: a title string or an array of title strings
fromTitle: the title of the tiddler from which the navigation originated
storyTitle: title of story tiddler (defaults to $:/StoryList)
options: see story.js
*/
exports.addToStory = function(title,fromTitle,storyTitle,options) {
var story = new $tw.Story({wiki: this, storyTitle: storyTitle});
story.addToStory(title,fromTitle,options);
console.log("$tw.wiki.addToStory() is deprecated since V5.1.23! Use the this.story.addToStory() from the story-object!")
};
/*
Generate a title for the draft of a given tiddler
*/
exports.generateDraftTitle = function(title) {
var c = 0,
draftTitle,
username = this.getTiddlerText("$:/status/UserName"),
attribution = username ? " by " + username : "";
do {
draftTitle = "Draft " + (c ? (c + 1) + " " : "") + "of '" + title + "'" + attribution;
c++;
} while(this.tiddlerExists(draftTitle));
return draftTitle;
};
/*
Invoke the available upgrader modules
titles: array of tiddler titles to be processed
tiddlers: hashmap by title of tiddler fields of pending import tiddlers. These can be modified by the upgraders. An entry with no fields indicates a tiddler that was pending import has been suppressed. When entries are added to the pending import the tiddlers hashmap may have entries that are not present in the titles array
Returns a hashmap of messages keyed by tiddler title.
*/
exports.invokeUpgraders = function(titles,tiddlers) {
// Collect up the available upgrader modules
var self = this;
if(!this.upgraderModules) {
this.upgraderModules = [];
$tw.modules.forEachModuleOfType("upgrader",function(title,module) {
if(module.upgrade) {
self.upgraderModules.push(module);
}
});
}
// Invoke each upgrader in turn
var messages = {};
for(var t=0; t<this.upgraderModules.length; t++) {
var upgrader = this.upgraderModules[t],
upgraderMessages = upgrader.upgrade(this,titles,tiddlers);
$tw.utils.extend(messages,upgraderMessages);
}
return messages;
};
// Determine whether a plugin by title is dynamically loadable
exports.doesPluginRequireReload = function(title) {
var tiddler = this.getTiddler(title);
if(tiddler && tiddler.fields.type === "application/json" && tiddler.fields["plugin-type"]) {
if(tiddler.fields["plugin-type"] === "import") {
// The import plugin never requires reloading
return false;
}
}
return this.doesPluginInfoRequireReload(this.getPluginInfo(title) || this.getTiddlerDataCached(title));
};
// Determine whether a plugin info structure is dynamically loadable
exports.doesPluginInfoRequireReload = function(pluginInfo) {
if(pluginInfo) {
var foundModule = false;
$tw.utils.each(pluginInfo.tiddlers,function(tiddler) {
if(tiddler.type === "application/javascript" && $tw.utils.hop(tiddler,"module-type")) {
foundModule = true;
}
});
return foundModule;
} else {
return null;
}
};
exports.slugify = function(title,options) {
var tiddler = this.getTiddler(title),
slug;
if(tiddler && tiddler.fields.slug) {
slug = tiddler.fields.slug;
} else {
slug = $tw.utils.transliterate(title.toString().toLowerCase()) // Replace diacritics with basic lowercase ASCII
.replace(/\s+/g,"-") // Replace spaces with -
.replace(/[^\w\-\.]+/g,"") // Remove all non-word chars except dash and dot
.replace(/\-\-+/g,"-") // Replace multiple - with single -
.replace(/^-+/,"") // Trim - from start of text
.replace(/-+$/,""); // Trim - from end of text
}
// If the resulting slug is blank (eg because the title is just punctuation characters)
if(!slug) {
// ...then just use the character codes of the title
var result = [];
$tw.utils.each(title.split(""),function(char) {
result.push(char.charCodeAt(0).toString());
});
slug = result.join("-");
}
return slug;
};
})();