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/ * \
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title : $ : / c o r e / m o d u l e s / w i k i . j s
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type : application / javascript
module - type : wikimethod
Extension methods for the $tw . Wiki object
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 last dispatched . Each entry is a hashmap containing two fields :
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modified : true / false
deleted : true / false
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* ` 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
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\ * /
( function ( ) {
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/*jslint node: true, browser: true */
/*global $tw: false */
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"use strict" ;
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var widget = require ( "$:/core/modules/widgets/widget.js" ) ;
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var USER _NAME _TITLE = "$:/status/UserName" ;
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/ *
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Get the value of a text reference . Text references can have any of these forms :
< tiddlertitle >
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< tiddlertitle > ! ! < fieldname >
! ! < fieldname > - specifies a field of the current tiddlers
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< tiddlertitle > # # < index >
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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 ;
if ( tr . field ) {
var tiddler = this . getTiddler ( title ) ;
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if ( tr . field === "title" ) { // Special case so we can return the title of a non-existent tiddler
return title ;
} else if ( tiddler && $tw . utils . hop ( tiddler . fields , tr . field ) ) {
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return tiddler . getFieldString ( tr . field ) ;
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} else {
return defaultText ;
}
} else if ( tr . index ) {
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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exports . setTextReference = function ( textRef , value , currTiddlerTitle ) {
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var tr = $tw . utils . parseTextReference ( textRef ) ,
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title , tiddler , fields ;
// Check if it is a reference to a tiddler
if ( tr . title && ! tr . field ) {
tiddler = this . getTiddler ( tr . title ) ;
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this . addTiddler ( new $tw . Tiddler ( tiddler , { title : tr . title , text : value } , this . getModificationFields ( ) ) ) ;
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// Else check for a field reference
} else if ( tr . field ) {
title = tr . title || currTiddlerTitle ;
tiddler = this . getTiddler ( title ) ;
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 , this . getModificationFields ( ) ) ) ;
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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 ;
// 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 ) ) {
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fields = { } ;
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fields [ tr . field ] = undefined ;
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this . addTiddler ( new $tw . Tiddler ( tiddler , fields , this . getModificationFields ( ) ) ) ;
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}
}
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} ;
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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 ) ;
}
}
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} ;
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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 ) ;
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}
}
} ;
/ *
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 created
* /
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exports . enqueueTiddlerEvent = function ( title , isDeleted ) {
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// Record the touch in the list of changed tiddlers
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 ;
// Increment the change count
this . changeCount = this . changeCount || { } ;
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if ( $tw . utils . hop ( this . changeCount , title ) ) {
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this . changeCount [ title ] ++ ;
} else {
this . changeCount [ title ] = 1 ;
}
// Trigger events
this . eventListeners = this . eventListeners || [ ] ;
if ( ! this . eventsTriggered ) {
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var self = this ;
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$tw . utils . nextTick ( function ( ) {
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var changes = self . changedTiddlers ;
self . changedTiddlers = { } ;
self . eventsTriggered = false ;
self . dispatchEvent ( "change" , changes ) ;
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} ) ;
this . eventsTriggered = true ;
}
} ;
exports . getChangeCount = function ( title ) {
this . changeCount = this . changeCount || { } ;
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if ( $tw . utils . hop ( this . changeCount , title ) ) {
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return this . changeCount [ title ] ;
} else {
return 0 ;
}
} ;
exports . deleteTiddler = function ( title ) {
delete this . tiddlers [ title ] ;
this . clearCache ( title ) ;
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this . clearGlobalCache ( ) ;
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this . enqueueTiddlerEvent ( title , true ) ;
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} ;
exports . tiddlerExists = function ( title ) {
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return ! ! this . tiddlers [ title ] ;
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} ;
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/ *
Generate an unused title from the specified base
* /
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exports . generateNewTitle = function ( baseTitle , options ) {
options = options || { } ;
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var c = 0 ,
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title = baseTitle ;
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while ( this . tiddlerExists ( title ) || this . isShadowTiddler ( title ) ) {
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title = baseTitle +
( options . prefix || " " ) +
( ++ c ) ;
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} ;
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return title ;
} ;
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exports . isSystemTiddler = function ( title ) {
return title . indexOf ( "$:/" ) === 0 ;
} ;
exports . isTemporaryTiddler = function ( title ) {
return title . indexOf ( "$:/temp/" ) === 0 ;
} ;
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/ *
Determines if a tiddler is a shadow tiddler , regardless of whether it has been overridden by a real tiddler
* /
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exports . isShadowTiddler = function ( title ) {
return $tw . utils . hop ( this . shadowTiddlers , title ) ;
} ;
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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 ;
}
} ;
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exports . addTiddler = function ( tiddler ) {
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// Check if we're passed a fields hashmap instead of a tiddler
if ( ! ( tiddler instanceof $tw . Tiddler ) ) {
tiddler = new $tw . Tiddler ( tiddler ) ;
}
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// Get the title
var title = tiddler . fields . title ;
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// Save the tiddler
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if ( title ) {
this . tiddlers [ title ] = tiddler ;
this . clearCache ( title ) ;
this . clearGlobalCache ( ) ;
this . enqueueTiddlerEvent ( title ) ;
}
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} ;
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/ *
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 ( existingTiddler . fields . version , tiddler . fields . version ) ) {
return false ;
}
}
// Fall through to adding the tiddler
this . addTiddler ( tiddler ) ;
return true ;
} ;
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/ *
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Return a hashmap of the fields that should be set when a tiddler is created
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* /
exports . getCreationFields = function ( ) {
var fields = {
created : new Date ( )
} ,
creator = this . getTiddlerText ( USER _NAME _TITLE ) ;
if ( creator ) {
fields . creator = creator ;
}
return fields ;
} ;
/ *
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Return a hashmap of the fields that should be set when a tiddler is modified
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* /
exports . getModificationFields = function ( ) {
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var fields = { } ,
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modifier = this . getTiddlerText ( USER _NAME _TITLE ) ;
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fields . modified = new Date ( ) ;
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if ( modifier ) {
fields . modifier = modifier ;
}
return fields ;
} ;
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/ *
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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 )
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* /
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exports . getTiddlers = function ( options ) {
options = options || { } ;
var self = this ,
sortField = options . sortField || "title" ,
tiddlers = [ ] , t , titles = [ ] ;
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for ( t in this . tiddlers ) {
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if ( $tw . utils . hop ( this . tiddlers , t ) ) {
if ( options . includeSystem || ! this . isSystemTiddler ( t ) ) {
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if ( ! options . excludeTag || ! this . tiddlers [ t ] . hasTag ( options . excludeTag ) ) {
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tiddlers . push ( this . tiddlers [ t ] ) ;
}
}
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}
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}
tiddlers . sort ( function ( a , b ) {
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var aa = a . fields [ sortField ] . toLowerCase ( ) || "" ,
bb = b . fields [ sortField ] . toLowerCase ( ) || "" ;
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if ( aa < bb ) {
return - 1 ;
} else {
if ( aa > bb ) {
return 1 ;
} else {
return 0 ;
}
}
} ) ;
for ( t = 0 ; t < tiddlers . length ; t ++ ) {
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titles . push ( tiddlers [ t ] . fields . title ) ;
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}
return titles ;
} ;
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exports . countTiddlers = function ( excludeTag ) {
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var tiddlers = this . getTiddlers ( { excludeTag : excludeTag } ) ;
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return $tw . utils . count ( tiddlers ) ;
} ;
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/ *
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
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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 , isNumeric ) {
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var self = this ;
titles . sort ( function ( a , b ) {
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if ( sortField !== "title" ) {
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a = self . getTiddler ( a ) . fields [ sortField ] || "" ;
b = self . getTiddler ( b ) . fields [ sortField ] || "" ;
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}
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if ( ! isNumeric || isNaN ( a ) || isNaN ( b ) ) {
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if ( ! isCaseSensitive ) {
if ( typeof a === "string" ) {
a = a . toLowerCase ( ) ;
}
if ( typeof b === "string" ) {
b = b . toLowerCase ( ) ;
}
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}
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}
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else {
a -= 0 ;
b -= 0 ;
}
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if ( a < b ) {
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return isDescending ? + 1 : - 1 ;
} else {
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if ( a > b ) {
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return isDescending ? - 1 : + 1 ;
} else {
return 0 ;
}
}
} ) ;
} ;
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/ *
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 */ ) {
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var arg = 0 ,
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options = arguments . length >= 2 ? arguments [ arg ++ ] : { } ,
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callback = arguments [ arg ++ ] ,
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titles = this . getTiddlers ( options ) ,
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t , tiddler ;
for ( t = 0 ; t < titles . length ; t ++ ) {
tiddler = this . tiddlers [ titles [ t ] ] ;
if ( tiddler ) {
callback . call ( this , tiddler . fields . title , tiddler ) ;
}
}
} ;
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/ *
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
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var parser = self . parseTiddler ( title ) ;
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// Count up the links
var links = [ ] ,
checkParseTree = function ( parseTree ) {
for ( var t = 0 ; t < parseTree . length ; t ++ ) {
var parseTreeNode = parseTree [ t ] ;
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if ( parseTreeNode . type === "link" && parseTreeNode . attributes . to && parseTreeNode . attributes . to . type === "string" ) {
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var value = parseTreeNode . attributes . to . value ;
if ( links . indexOf ( value ) === - 1 ) {
links . push ( value ) ;
}
}
if ( parseTreeNode . children ) {
checkParseTree ( parseTreeNode . children ) ;
}
}
} ;
if ( parser ) {
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checkParseTree ( parser . tree ) ;
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}
return links ;
} ) ;
} ;
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/ *
Return an array of tiddler titles that link to the specified tiddler
* /
exports . getTiddlerBacklinks = function ( targetTitle ) {
var self = this ,
backlinks = [ ] ;
this . forEachTiddler ( function ( title , tiddler ) {
var links = self . getTiddlerLinks ( title ) ;
if ( links . indexOf ( targetTitle ) !== - 1 ) {
backlinks . push ( title ) ;
}
} ) ;
return backlinks ;
} ;
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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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exports . getMissingTitles = function ( ) {
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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 ) {
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if ( ( ! self . tiddlerExists ( link ) && ! self . isShadowTiddler ( link ) ) && missing . indexOf ( link ) === - 1 ) {
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missing . push ( link ) ;
}
} ) ;
} ) ;
return missing ;
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} ;
exports . getOrphanTitles = function ( ) {
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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
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} ;
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exports . getSystemTitles = function ( ) {
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var titles = [ ] ;
for ( var title in this . tiddlers ) {
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if ( this . isSystemTiddler ( title ) ) {
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titles . push ( title ) ;
}
}
titles . sort ( ) ;
return titles ;
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} ;
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exports . getShadowTitles = function ( ) {
var titles = [ ] ;
for ( var title in this . shadowTiddlers ) {
titles . push ( title ) ;
}
titles . sort ( ) ;
return titles ;
} ;
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/ *
Retrieves a list of the tiddler titles that are tagged with a given tag
* /
exports . getTiddlersWithTag = function ( tag ) {
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var self = this ;
return this . getGlobalCache ( "taglist-" + tag , function ( ) {
var tagmap = self . getTagMap ( ) ;
return self . sortByList ( tagmap [ tag ] , tag ) ;
} ) ;
} ;
/ *
Get a hashmap by tag of arrays of tiddler titles
* /
exports . getTagMap = function ( ) {
var self = this ;
return this . getGlobalCache ( "tagmap" , function ( ) {
var tags = { } ;
// Collect up all the tags
for ( var title in self . tiddlers ) {
var tiddler = self . tiddlers [ title ] ;
if ( tiddler . fields . tags ) {
for ( var index = 0 ; index < tiddler . fields . tags . length ; index ++ ) {
var tag = tiddler . fields . tags [ index ] ;
if ( tags [ tag ] ) {
tags [ tag ] . push ( title )
} else {
tags [ tag ] = [ title ] ;
}
}
}
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}
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return tags ;
} ) ;
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} ;
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/ *
Lookup a given tiddler and return a list of all the tiddlers that include it in their list
* /
exports . findListingsOfTiddler = function ( targetTitle ) {
// Get the list associated with the tag
var titles = [ ] ;
for ( var title in this . tiddlers ) {
var tiddler = this . tiddlers [ title ] ;
if ( $tw . utils . isArray ( tiddler . fields . list ) && tiddler . fields . list . indexOf ( targetTitle ) !== - 1 ) {
titles . push ( title ) ;
}
}
return titles ;
} ;
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/ *
Sorts an array of tiddler titles according to an ordered list
* /
exports . sortByList = function ( array , listTitle ) {
var list = this . getTiddlerList ( listTitle ) ;
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if ( ! array || array . length === 0 ) {
return [ ] ;
} else if ( list ) {
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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 ) ;
}
}
return titles ;
} else {
return array ;
}
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} ;
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/ *
Retrieve a tiddler as a JSON string of the fields
* /
exports . getTiddlerAsJson = function ( title ) {
var tiddler = this . getTiddler ( title ) ;
if ( tiddler ) {
var fields = { } ;
$tw . utils . each ( tiddler . fields , function ( value , name ) {
fields [ name ] = tiddler . getFieldString ( name ) ;
} ) ;
return JSON . stringify ( fields ) ;
} else {
return JSON . stringify ( { title : title } ) ;
}
} ;
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/ *
Get a tiddlers content 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
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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 .
* /
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 ) {
switch ( tiddler . fields . type ) {
case "application/json" :
// JSON tiddler
try {
data = JSON . parse ( tiddler . fields . text ) ;
} catch ( ex ) {
return defaultData ;
}
return data ;
case "application/x-tiddler-dictionary" :
return $tw . utils . parseFields ( tiddler . fields . text ) ;
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}
}
return defaultData ;
} ;
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/ *
Extract an indexed field from within a data tiddler
* /
exports . extractTiddlerDataItem = function ( title , index , defaultText ) {
var data = this . getTiddlerData ( title , { } ) ,
text ;
if ( data && $tw . utils . hop ( data , index ) ) {
text = data [ index ] ;
}
if ( typeof text === "string" || typeof text === "number" ) {
return text . toString ( ) ;
} else {
return defaultText ;
}
} ;
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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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title : title of tiddler
data : object that can be serialised to JSON
fields : optional hashmap of additional tiddler fields to be set
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* /
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exports . setTiddlerData = function ( title , data , fields ) {
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var tiddler = this . getTiddler ( title ) ;
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this . addTiddler ( new $tw . Tiddler ( tiddler , fields , { title : title , type : "application/json" , text : JSON . stringify ( data , null , $tw . config . preferences . jsonSpaces ) } , this . getModificationFields ( ) ) ) ;
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} ;
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/ *
Return the content of a tiddler as an array containing each line
* /
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exports . getTiddlerList = function ( title , field , index ) {
if ( index ) {
return $tw . utils . parseStringArray ( this . extractTiddlerDataItem ( title , index , "" ) ) ;
}
field = field || "list" ;
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var tiddler = this . getTiddler ( title ) ;
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if ( tiddler ) {
return ( $tw . utils . parseStringArray ( tiddler . fields [ field ] ) || [ ] ) . slice ( 0 ) ;
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}
return [ ] ;
} ;
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// 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 || { } ;
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 = { } ;
}
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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
exports . getCacheForTiddler = function ( title , cacheName , initializer ) {
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// Temporarily disable caching so that tweakParseTreeNode() works
return initializer ( ) ;
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this . caches = this . caches || { } ;
var caches = this . caches [ title ] ;
if ( caches && caches [ cacheName ] ) {
return caches [ cacheName ] ;
} else {
if ( ! caches ) {
caches = { } ;
this . caches [ title ] = caches ;
}
caches [ cacheName ] = initializer ( ) ;
return caches [ cacheName ] ;
}
} ;
// Clear all caches associated with a particular tiddler
exports . clearCache = function ( title ) {
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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exports . initParsers = function ( moduleType ) {
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// Install the parser modules
$tw . Wiki . parsers = { } ;
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var self = this ;
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$tw . modules . forEachModuleOfType ( "parser" , function ( title , module ) {
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for ( var f in module ) {
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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/ *
Parse a block of text of a specified MIME type
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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
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* /
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exports . old _parseText = function ( type , text , options ) {
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options = options || { } ;
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// Select a parser
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var Parser = $tw . Wiki . parsers [ type ] ;
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if ( ! Parser && $tw . config . fileExtensionInfo [ type ] ) {
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Parser = $tw . Wiki . parsers [ $tw . config . fileExtensionInfo [ type ] . type ] ;
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}
if ( ! Parser ) {
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Parser = $tw . Wiki . parsers [ options . defaultType || "text/vnd.tiddlywiki" ] ;
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}
if ( ! Parser ) {
return null ;
}
// Return the parser instance
return new Parser ( type , text , {
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parseAsInline : options . parseAsInline ,
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wiki : this
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} ) ;
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} ;
/ *
Parse a tiddler according to its MIME type
* /
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exports . old _parseTiddler = function ( title , options ) {
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options = options || { } ;
var cacheType = options . parseAsInline ? "newInlineParseTree" : "newBlockParseTree" ,
tiddler = this . getTiddler ( title ) ,
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self = this ;
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return tiddler ? this . getCacheForTiddler ( title , cacheType , function ( ) {
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return self . old _parseText ( tiddler . fields . type , tiddler . fields . text , options ) ;
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} ) : null ;
} ;
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// We need to tweak parse trees generated by the existing parser because of the change from {type:"element",tag:"$tiddler",...} to {type:"tiddler",...}
var tweakParseTreeNode = function ( node ) {
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if ( node . type === "element" && node . tag . charAt ( 0 ) === "$" ) {
node . type = node . tag . substr ( 1 ) ;
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delete node . tag ;
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}
tweakParseTreeNodes ( node . children ) ;
} ;
var tweakParseTreeNodes = function ( nodeList ) {
$tw . utils . each ( nodeList , tweakParseTreeNode ) ;
} ;
var tweakMacroDefinition = function ( nodeList ) {
if ( nodeList && nodeList [ 0 ] && nodeList [ 0 ] . type === "macrodef" ) {
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nodeList [ 0 ] . type = "set" ;
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nodeList [ 0 ] . attributes = {
name : { type : "string" , value : nodeList [ 0 ] . name } ,
value : { type : "string" , value : nodeList [ 0 ] . text }
} ;
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nodeList [ 0 ] . children = nodeList . slice ( 1 ) ;
nodeList . splice ( 1 , nodeList . length - 1 ) ;
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tweakMacroDefinition ( nodeList [ 0 ] . children ) ;
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}
} ;
var tweakParser = function ( parser ) {
// Move any macro definitions to contain the body tree
tweakMacroDefinition ( parser . tree ) ;
// Tweak widgets
tweakParseTreeNodes ( parser . tree ) ;
} ;
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exports . parseText = function ( type , text , options ) {
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var parser = this . old _parseText ( type , text , options ) ;
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if ( parser ) {
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tweakParser ( parser )
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} ;
return parser ;
} ;
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exports . parseTiddler = function ( title , options ) {
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var parser = this . old _parseTiddler ( title , options ) ;
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if ( parser ) {
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tweakParser ( parser )
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} ;
return parser ;
} ;
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exports . parseTextReference = function ( title , field , index , options ) {
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if ( field === "text" || ( ! field && ! index ) ) {
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// Force the tiddler to be lazily loaded
this . getTiddlerText ( title ) ;
// Parse it
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return this . parseTiddler ( title , options ) ;
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} else {
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var text ;
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if ( field ) {
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if ( field === "title" ) {
text = title ;
} else {
var tiddler = this . getTiddler ( title ) ;
if ( ! tiddler || ! tiddler . hasField ( field ) ) {
return null ;
}
text = tiddler . fields [ field ] ;
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}
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return this . parseText ( "text/vnd.tiddlywiki" , text . toString ( ) , options ) ;
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} else if ( index ) {
text = this . extractTiddlerDataItem ( title , index , "" ) ;
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if ( text === undefined ) {
return null ;
}
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return this . parseText ( "text/vnd.tiddlywiki" , text , options ) ;
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}
}
} ;
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/ *
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 ;
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// Create set variable widgets for each variable
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$tw . utils . each ( options . variables , function ( value , name ) {
var setVariableWidget = {
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type : "set" ,
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attributes : {
name : { type : "string" , value : name } ,
value : { type : "string" , value : value }
} ,
children : [ ]
} ;
currWidgetNode . children = [ setVariableWidget ] ;
currWidgetNode = setVariableWidget ;
} ) ;
// Add in the supplied parse tree nodes
currWidgetNode . children = parser ? parser . tree : [ ] ;
// Create the widget
return new widget . widget ( widgetNode , {
wiki : this ,
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document : options . document || $tw . fakeDocument ,
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parentWidget : options . parentWidget
} ) ;
} ;
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/ *
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
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options : see below
Options include :
variables : hashmap of variables to set
parentWidget : optional parent widget for the root node
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* /
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exports . renderText = function ( outputType , textType , text , options ) {
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options = options || { } ;
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var parser = this . parseText ( textType , text , options ) ,
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widgetNode = this . makeWidget ( parser , options ) ;
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var container = $tw . fakeDocument . createElement ( "div" ) ;
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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
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options : see below
Options include :
variables : hashmap of variables to set
parentWidget : optional parent widget for the root node
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* /
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exports . renderTiddler = function ( outputType , title , options ) {
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options = options || { } ;
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var parser = this . parseTiddler ( title ) ,
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widgetNode = this . makeWidget ( parser , options ) ;
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var container = $tw . fakeDocument . createElement ( "div" ) ;
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widgetNode . render ( container , null ) ;
return outputType === "text/html" ? container . innerHTML : container . textContent ;
} ;
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/ *
Return an array of tiddler titles that match a search string
text : The text string to search for
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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
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caseSensitive : If true forces a case sensitive search
literal : If true , searches for literal string , rather than separate search terms
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* /
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exports . search = function ( text , options ) {
options = options || { } ;
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var self = this , t ;
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// Convert the search string into a regexp for each term
var terms , searchTermsRegExps ,
flags = options . caseSensitive ? "" : "i" ;
if ( options . literal ) {
if ( text . length === 0 ) {
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searchTermsRegExps = null ;
} else {
searchTermsRegExps = [ new RegExp ( "(" + $tw . utils . escapeRegExp ( text ) + ")" , flags ) ] ;
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}
} else {
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terms = text . split ( / +/ ) ;
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if ( terms . length === 1 && terms [ 0 ] === "" ) {
searchTermsRegExps = null ;
} else {
searchTermsRegExps = [ ] ;
for ( t = 0 ; t < terms . length ; t ++ ) {
searchTermsRegExps . push ( new RegExp ( "(" + $tw . utils . escapeRegExp ( terms [ t ] ) + ")" , flags ) ) ;
}
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}
}
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// Function to check a given tiddler for the search term
var searchTiddler = function ( title ) {
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if ( ! searchTermsRegExps ) {
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return true ;
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}
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var tiddler = self . getTiddler ( title ) ;
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if ( ! tiddler ) {
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tiddler = new $tw . Tiddler ( { title : title , text : "" , type : "text/vnd.tiddlywiki" } ) ;
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}
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var contentTypeInfo = $tw . config . contentTypeInfo [ tiddler . fields . type ] || $tw . config . contentTypeInfo [ "text/vnd.tiddlywiki" ] ,
match ;
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for ( var t = 0 ; t < searchTermsRegExps . length ; t ++ ) {
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// Search title, tags and body
match = false ;
if ( contentTypeInfo . encoding === "utf8" ) {
match = match || searchTermsRegExps [ t ] . test ( tiddler . fields . text ) ;
}
var tags = tiddler . fields . tags ? tiddler . fields . tags . join ( "\0" ) : "" ;
match = match || searchTermsRegExps [ t ] . test ( tags ) || searchTermsRegExps [ t ] . test ( tiddler . fields . title ) ;
if ( ! match ) {
return false ;
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}
}
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return true ;
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} ;
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// Loop through all the tiddlers doing the search
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var results = [ ] ;
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if ( $tw . utils . isArray ( options . titles ) ) {
for ( t = 0 ; t < options . titles . length ; t ++ ) {
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if ( ! ! searchTiddler ( options . titles [ t ] ) === ! options . invert ) {
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results . push ( options . titles [ t ] ) ;
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}
}
} else {
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var source = options . titles || this . tiddlers ;
for ( t in source ) {
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if ( ! ! searchTiddler ( t ) === ! options . invert ) {
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results . push ( t ) ;
}
}
}
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// 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 ) ;
}
}
}
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return results ;
} ;
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/ *
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 .
* /
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exports . getTiddlerText = function ( title , defaultText ) {
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var tiddler = this . getTiddler ( title ) ;
// Return undefined if the tiddler isn't found
if ( ! tiddler ) {
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return defaultText ;
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}
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if ( tiddler . fields . text !== undefined ) {
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// Just return the text if we've got it
return tiddler . fields . text ;
} else {
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// Tell any listeners about the need to lazily load this tiddler
this . dispatchEvent ( "lazyLoad" , title ) ;
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// Indicate that the text is being loaded
return null ;
}
} ;
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/ *
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Read an array of browser File objects , invoking callback ( tiddlerFieldsArray ) once they ' re all read
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* /
exports . readFiles = function ( files , callback ) {
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var result = [ ] ,
outstanding = files . length ;
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for ( var f = 0 ; f < files . length ; f ++ ) {
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this . readFile ( files [ f ] , function ( tiddlerFieldsArray ) {
result . push . apply ( result , tiddlerFieldsArray ) ;
if ( -- outstanding === 0 ) {
callback ( result ) ;
}
} ) ;
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} ;
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return files . length ;
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} ;
/ *
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Read a browser File object , invoking callback ( tiddlerFieldsArray ) with an array of tiddler fields objects
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* /
exports . readFile = function ( file , 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 . config . fileExtensionInfo [ 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 ;
// Create the FileReader
var reader = new FileReader ( ) ;
// Onload
reader . onload = function ( event ) {
// Deserialise the file contents
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var text = event . target . result ,
tiddlerFields = { title : file . name || "Untitled" , type : type } ;
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// Are we binary?
if ( isBinary ) {
// The base64 section starts after the first comma in the data URI
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var commaPos = text . indexOf ( "," ) ;
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if ( commaPos !== - 1 ) {
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tiddlerFields . text = text . substr ( commaPos + 1 ) ;
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callback ( [ tiddlerFields ] ) ;
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}
} else {
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// Check whether this is an encrypted TiddlyWiki file
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var encryptedJson = $tw . utils . extractEncryptedStoreArea ( text ) ;
if ( encryptedJson ) {
// If so, attempt to decrypt it with the current password
$tw . utils . decryptStoreAreaInteractive ( encryptedJson , function ( tiddlers ) {
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callback ( tiddlers ) ;
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} ) ;
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} else {
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// Otherwise, just try to deserialise any tiddlers in the file
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callback ( self . deserializeTiddlers ( type , text , tiddlerFields ) ) ;
}
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}
} ;
// Kick off the read
if ( isBinary ) {
reader . readAsDataURL ( file ) ;
} else {
reader . readAsText ( file ) ;
}
} ;
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} ) ( ) ;