Smalltalk createPackage: 'Kernel-Infrastructure'! Object subclass: #ConsoleErrorHandler instanceVariableNames: '' package: 'Kernel-Infrastructure'! !ConsoleErrorHandler commentStamp! I am manage Smalltalk errors, displaying the stack in the console.! !ConsoleErrorHandler methodsFor: 'error handling'! handleError: anError anError context ifNotNil: [ self logErrorContext: anError context ]. self logError: anError ! ! !ConsoleErrorHandler methodsFor: 'private'! log: aString console log: aString ! logContext: aContext aContext home ifNotNil: [ self logContext: aContext home ]. self log: aContext asString ! logError: anError self log: anError messageText ! logErrorContext: aContext aContext ifNotNil: [ aContext home ifNotNil: [ self logContext: aContext home ]] ! ! ConsoleErrorHandler class instanceVariableNames: 'current'! !ConsoleErrorHandler class methodsFor: 'initialization'! initialize ErrorHandler registerIfNone: self new ! ! Object subclass: #InterfacingObject instanceVariableNames: '' package: 'Kernel-Infrastructure'! !InterfacingObject commentStamp! I am superclass of all object that interface with user or environment. `Widget` and a few other classes are subclasses of me. I delegate all of the above APIs to `PlatformInterface`. ## API self alert: 'Hey, there is a problem'. self confirm: 'Affirmative?'. self prompt: 'Your name:'. self ajax: #{ 'url' -> '/patch.js'. 'type' -> 'GET'. dataType->'script' }.! !InterfacingObject methodsFor: 'actions'! ajax: anObject ^ PlatformInterface ajax: anObject ! alert: aString ^ PlatformInterface alert: aString ! confirm: aString ^ PlatformInterface confirm: aString ! prompt: aString ^ PlatformInterface prompt: aString ! ! InterfacingObject subclass: #Environment instanceVariableNames: '' package: 'Kernel-Infrastructure'! !Environment commentStamp! I provide an unified entry point to manipulate Amber packages, classes and methods. Typical use cases include IDEs, remote access and restricting browsing.! !Environment methodsFor: 'accessing'! allSelectors ^ Smalltalk vm allSelectors ! availableClassNames ^ Smalltalk classes collect: [ :each | each name ] ! availablePackageNames ^ Smalltalk packages collect: [ :each | each name ] ! availableProtocolsFor: aClass | protocols | protocols := aClass protocols. aClass superclass ifNotNil: [ protocols addAll: (self availableProtocolsFor: aClass superclass) ]. ^ protocols asSet asArray sort ! classBuilder ^ ClassBuilder new ! classNamed: aString ^ (Smalltalk globals at: aString asSymbol) ifNil: [ self error: 'Invalid class name' ] ! classes ^ Smalltalk classes ! doItReceiver ^ DoIt new ! packages ^ Smalltalk packages ! systemAnnouncer ^ (Smalltalk globals at: #SystemAnnouncer) current ! ! !Environment methodsFor: 'actions'! commitPackage: aPackage aPackage commit ! copyClass: aClass to: aClassName (Smalltalk globals at: aClassName) ifNotNil: [ self error: 'A class named ', aClassName, ' already exists' ]. ClassBuilder new copyClass: aClass named: aClassName ! eval: aString on: aReceiver | compiler | compiler := Compiler new. [ compiler parseExpression: aString ] on: Error do: [ :ex | ^ self alert: ex messageText ]. ^ compiler evaluateExpression: aString on: aReceiver ! inspect: anObject Inspector inspect: anObject ! moveClass: aClass toPackage: aPackageName | package | package := Package named: aPackageName. package ifNil: [ self error: 'Invalid package name' ]. package == aClass package ifTrue: [ ^ self ]. aClass package: package ! moveMethod: aMethod toClass: aClassName | destinationClass | destinationClass := self classNamed: aClassName. destinationClass == aMethod methodClass ifTrue: [ ^ self ]. destinationClass compile: aMethod source protocol: aMethod protocol. aMethod methodClass removeCompiledMethod: aMethod ! moveMethod: aMethod toProtocol: aProtocol aMethod protocol: aProtocol ! removeClass: aClass Smalltalk removeClass: aClass ! removeMethod: aMethod aMethod methodClass removeCompiledMethod: aMethod ! removeProtocol: aString from: aClass (aClass methodsInProtocol: aString) do: [ :each | aClass removeCompiledMethod: each ] ! renameClass: aClass to: aClassName (Smalltalk globals at: aClassName) ifNotNil: [ self error: 'A class named ', aClassName, ' already exists' ]. ClassBuilder new renameClass: aClass to: aClassName ! renameProtocol: aString to: anotherString in: aClass (aClass methodsInProtocol: aString) do: [ :each | each protocol: anotherString ] ! setClassCommentOf: aClass to: aString aClass comment: aString ! ! !Environment methodsFor: 'compiling'! addInstVarNamed: aString to: aClass self classBuilder addSubclassOf: aClass superclass named: aClass name instanceVariableNames: (aClass instanceVariableNames copy add: aString; yourself) package: aClass package name ! compileClassComment: aString for: aClass aClass comment: aString ! compileClassDefinition: aString [ self eval: aString on: DoIt new ] on: Error do: [ :error | self alert: error messageText ] ! compileMethod: sourceCode for: class protocol: protocol ^ class compile: sourceCode protocol: protocol ! ! !Environment methodsFor: 'error handling'! evaluate: aBlock on: anErrorClass do: exceptionBlock "Evaluate a block and catch exceptions happening on the environment stack" self try: aBlock catch: [ :exception | (exception isKindOf: (self classNamed: anErrorClass name)) ifTrue: [ exceptionBlock value: exception ] ifFalse: [ exception signal ] ] ! ! !Environment methodsFor: 'services'! registerErrorHandler: anErrorHandler ErrorHandler register: anErrorHandler ! registerInspector: anInspector Inspector register: anInspector ! registerProgressHandler: aProgressHandler ProgressHandler register: aProgressHandler ! registerTranscript: aTranscript Transcript register: aTranscript ! ! ProtoObject subclass: #JSObjectProxy instanceVariableNames: 'jsObject' package: 'Kernel-Infrastructure'! !JSObjectProxy commentStamp! I handle sending messages to JavaScript objects, making JavaScript object accessing from Amber fully transparent. My instances make intensive use of `#doesNotUnderstand:`. My instances are automatically created by Amber whenever a message is sent to a JavaScript object. ## Usage examples JSObjectProxy objects are instanciated by Amber when a Smalltalk message is sent to a JavaScript object. window alert: 'hello world'. window inspect. (window jQuery: 'body') append: 'hello world' Amber messages sends are converted to JavaScript function calls or object property access _(in this order)_. If n one of them match, a `MessageNotUnderstood` error will be thrown. ## Message conversion rules - `someUser name` becomes `someUser.name` - `someUser name: 'John'` becomes `someUser name = "John"` - `console log: 'hello world'` becomes `console.log('hello world')` - `(window jQuery: 'foo') css: 'background' color: 'red'` becomes `window.jQuery('foo').css('background', 'red')` __Note:__ For keyword-based messages, only the first keyword is kept: `window foo: 1 bar: 2` is equivalent to `window foo: 1 baz: 2`.! !JSObjectProxy methodsFor: 'accessing'! at: aString ! at: aString ifAbsent: aBlock "return the aString property or evaluate aBlock if the property is not defined on the object" < var obj = self['@jsObject']; return aString in obj ? obj[aString] : aBlock._value(); > ! at: aString ifPresent: aBlock "return the evaluation of aBlock with the value if the property is defined or return nil" < var obj = self['@jsObject']; return aString in obj ? aBlock._value_(obj[aString]) : nil; > ! at: aString ifPresent: aBlock ifAbsent: anotherBlock "return the evaluation of aBlock with the value if the property is defined or return value of anotherBlock" < var obj = self['@jsObject']; return aString in obj ? aBlock._value_(obj[aString]) : anotherBlock._value(); > ! at: aString put: anObject ! jsObject ^ jsObject ! jsObject: aJSObject jsObject := aJSObject ! lookupProperty: aString "Looks up a property in JS object. Answer the property if it is present, or nil if it is not present." ! ! !JSObjectProxy methodsFor: 'comparing'! = anObject anObject class == self class ifFalse: [ ^ false ]. ^ self compareJSObjectWith: anObject jsObject ! ! !JSObjectProxy methodsFor: 'enumerating'! asJSON "Answers the receiver in a stringyfy-friendly fashion" ^ jsObject ! keysAndValuesDo: aBlock < var o = self['@jsObject']; for(var i in o) { aBlock._value_value_(i, o[i]); } > ! ! !JSObjectProxy methodsFor: 'printing'! printOn: aStream aStream nextPutAll: self printString ! printString < var js = self['@jsObject']; return js.toString ? js.toString() : Object.prototype.toString.call(js) > ! ! !JSObjectProxy methodsFor: 'private'! compareJSObjectWith: aJSObject ! ! !JSObjectProxy methodsFor: 'proxy'! addObjectVariablesTo: aDictionary < for(var i in self['@jsObject']) { aDictionary._at_put_(i, self['@jsObject'][i]); } > ! doesNotUnderstand: aMessage ^ (self lookupProperty: aMessage selector asJavaScriptSelector) ifNil: [ super doesNotUnderstand: aMessage ] ifNotNil: [ :jsSelector | self forwardMessage: jsSelector withArguments: aMessage arguments ] ! forwardMessage: aString withArguments: anArray < return smalltalk.send(self._jsObject(), aString, anArray); > ! inspectOn: anInspector | variables | variables := Dictionary new. variables at: '#self' put: self jsObject. anInspector setLabel: self printString. self addObjectVariablesTo: variables. anInspector setVariables: variables ! ! !JSObjectProxy class methodsFor: 'instance creation'! on: aJSObject ^ self new jsObject: aJSObject; yourself ! ! Object subclass: #NullProgressHandler instanceVariableNames: '' package: 'Kernel-Infrastructure'! !NullProgressHandler commentStamp! I am the default progress handler. I do not display any progress, and simply iterate over the collection.! !NullProgressHandler methodsFor: 'progress handling'! do: aBlock on: aCollection displaying: aString aCollection do: aBlock ! ! NullProgressHandler class instanceVariableNames: 'current'! !NullProgressHandler class methodsFor: 'initialization'! initialize ProgressHandler registerIfNone: self new ! ! Object subclass: #Organizer instanceVariableNames: '' package: 'Kernel-Infrastructure'! !Organizer commentStamp! I represent categorization information. ## API Use `#addElement:` and `#removeElement:` to manipulate instances.! !Organizer methodsFor: 'accessing'! addElement: anObject ! elements ^ (self basicAt: 'elements') copy ! removeElement: anObject ! ! Organizer subclass: #ClassOrganizer instanceVariableNames: '' package: 'Kernel-Infrastructure'! !ClassOrganizer commentStamp! I am an organizer specific to classes. I hold method categorization information for classes.! !ClassOrganizer methodsFor: 'accessing'! addElement: aString super addElement: aString. SystemAnnouncer current announce: (ProtocolAdded new protocol: aString; theClass: self theClass; yourself) ! removeElement: aString super removeElement: aString. SystemAnnouncer current announce: (ProtocolRemoved new protocol: aString; theClass: self theClass; yourself) ! theClass < return self.theClass > ! ! Organizer subclass: #PackageOrganizer instanceVariableNames: '' package: 'Kernel-Infrastructure'! !PackageOrganizer commentStamp! I am an organizer specific to packages. I hold classes categorization information.! Object subclass: #Package instanceVariableNames: 'transport' package: 'Kernel-Infrastructure'! !Package commentStamp! I am similar to a "class category" typically found in other Smalltalks like Pharo or Squeak. Amber does not have class categories anymore, it had in the beginning but now each class in the system knows which package it belongs to. Each package has a name and can be queried for its classes, but it will then resort to a reverse scan of all classes to find them. ## API Packages are manipulated through "Smalltalk current", like for example finding one based on a name or with `Package class >> #name` directly: Smalltalk current packageAt: 'Kernel' Package named: 'Kernel' A package differs slightly from a Monticello package which can span multiple class categories using a naming convention based on hyphenation. But just as in Monticello a package supports "class extensions" so a package can define behaviors in foreign classes using a naming convention for method categories where the category starts with an asterisk and then the name of the owning package follows. You can fetch a package from the server: Package load: 'Additional-Examples'! !Package methodsFor: 'accessing'! basicTransport "Answer the transport literal JavaScript object as setup in the JavaScript file, if any" ! definition ^ String streamContents: [ :stream | stream nextPutAll: self class name; nextPutAll: String lf, String tab; nextPutAll: ' named: '; nextPutAll: '''', self name, ''''; nextPutAll: String lf, String tab; nextPutAll: ' transport: ('; nextPutAll: self transport definition, ')' ] ! name ! name: aString ! organization ^ self basicAt: 'organization' ! transport ^ transport ifNil: [ transport := (PackageTransport fromJson: self basicTransport) package: self; yourself ] ! transport: aPackageTransport transport := aPackageTransport. aPackageTransport package: self ! ! !Package methodsFor: 'classes'! classes ^ self organization elements ! setupClasses self classes do: [ :each | ClassBuilder new setupClass: each ]; do: [ :each | each initialize ] ! sortedClasses "Answer all classes in the receiver, sorted by superclass/subclasses and by class name for common subclasses (Issue #143)." ^ self class sortedClasses: self classes ! ! !Package methodsFor: 'dependencies'! loadDependencies "Returns list of packages that need to be loaded before loading this package." | classes packages | classes := self loadDependencyClasses. ^ (classes collect: [ :each | each package ]) asSet remove: self ifAbsent: []; yourself ! loadDependencyClasses "Returns classes needed at the time of loading a package. These are all that are used to subclass and to define an extension method" | starCategoryName | starCategoryName := '*', self name. ^ (self classes collect: [ :each | each superclass ]) asSet remove: nil ifAbsent: []; addAll: (Smalltalk classes select: [ :each | each protocols, each class protocols includes: starCategoryName ]); yourself ! ! !Package methodsFor: 'printing'! printOn: aStream super printOn: aStream. aStream nextPutAll: ' ('; nextPutAll: self name; nextPutAll: ')' ! ! !Package methodsFor: 'testing'! isPackage ^ true ! ! Package class instanceVariableNames: 'defaultCommitPathJs defaultCommitPathSt'! !Package class methodsFor: 'accessing'! named: aPackageName ^ Smalltalk packageAt: aPackageName ifAbsent: [ Smalltalk createPackage: aPackageName ] ! named: aPackageName ifAbsent: aBlock ^ Smalltalk packageAt: aPackageName ifAbsent: aBlock ! named: aPackageName transport: aTransport | package | package := self named: aPackageName. package transport: aTransport. ^ package ! ! !Package class methodsFor: 'sorting'! sortedClasses: classes "Answer classes, sorted by superclass/subclasses and by class name for common subclasses (Issue #143)" | children others nodes expandedClasses | children := #(). others := #(). classes do: [ :each | (classes includes: each superclass) ifFalse: [ children add: each ] ifTrue: [ others add: each ]]. nodes := children collect: [ :each | ClassSorterNode on: each classes: others level: 0 ]. nodes := nodes sorted: [ :a :b | a theClass name <= b theClass name ]. expandedClasses := Array new. nodes do: [ :aNode | aNode traverseClassesWith: expandedClasses ]. ^ expandedClasses ! ! Object subclass: #PlatformInterface instanceVariableNames: '' package: 'Kernel-Infrastructure'! !PlatformInterface commentStamp! I am single entry point to UI and environment interface. My `initialize` tries several options (for now, browser environment only) to set myself up. ## API PlatformInterface alert: 'Hey, there is a problem'. PlatformInterface confirm: 'Affirmative?'. PlatformInterface prompt: 'Your name:'. PlatformInterface ajax: #{ 'url' -> '/patch.js'. 'type' -> 'GET'. dataType->'script' }.! PlatformInterface class instanceVariableNames: 'worker'! !PlatformInterface class methodsFor: 'accessing'! globals ! setWorker: anObject worker := anObject ! ! !PlatformInterface class methodsFor: 'actions'! ajax: anObject ^ worker ifNotNil: [ worker ajax: anObject ] ifNil: [ self error: 'ajax: not available' ] ! alert: aString ^ worker ifNotNil: [ worker alert: aString ] ifNil: [ self error: 'alert: not available' ] ! confirm: aString ^ worker ifNotNil: [ worker confirm: aString ] ifNil: [ self error: 'confirm: not available' ] ! existsGlobal: aString ^ PlatformInterface globals at: aString ifPresent: [ true ] ifAbsent: [ false ] ! prompt: aString ^ worker ifNotNil: [ worker prompt: aString ] ifNil: [ self error: 'prompt: not available' ] ! ! !PlatformInterface class methodsFor: 'initialization'! initialize | candidate | super initialize. BrowserInterface ifNotNil: [ candidate := BrowserInterface new. candidate isAvailable ifTrue: [ self setWorker: candidate. ^ self ] ] ! ! Object subclass: #Service instanceVariableNames: '' package: 'Kernel-Infrastructure'! !Service commentStamp! I implement the basic behavior for class registration to a service. See the `Transcript` class for a concrete service. ## API Use class-side methods `#register:` and `#registerIfNone:` to register classes to a specific service.! Service class instanceVariableNames: 'current'! !Service class methodsFor: 'accessing'! current ^ current ! ! !Service class methodsFor: 'instance creation'! new self shouldNotImplement ! ! !Service class methodsFor: 'registration'! register: anObject current := anObject ! registerIfNone: anObject self current ifNil: [ self register: anObject ] ! ! Service subclass: #ErrorHandler instanceVariableNames: '' package: 'Kernel-Infrastructure'! !ErrorHandler commentStamp! I am the service used to handle Smalltalk errors. See `boot.js` `handleError()` function. Registered service instances must implement `#handleError:` to perform an action on the thrown exception.! !ErrorHandler class methodsFor: 'error handling'! handleError: anError self current handleError: anError ! ! Service subclass: #Inspector instanceVariableNames: '' package: 'Kernel-Infrastructure'! !Inspector commentStamp! I am the service responsible for inspecting objects. The default inspector object is the transcript.! !Inspector class methodsFor: 'inspecting'! inspect: anObject ^ self current inspect: anObject ! ! Service subclass: #ProgressHandler instanceVariableNames: '' package: 'Kernel-Infrastructure'! !ProgressHandler commentStamp! I am used to manage progress in collection iterations, see `SequenceableCollection >> #do:displayingProgress:`. Registered instances must implement `#do:on:displaying:`. The default behavior is to simply iterate over the collection, using `NullProgressHandler`.! !ProgressHandler class methodsFor: 'progress handling'! do: aBlock on: aCollection displaying: aString self current do: aBlock on: aCollection displaying: aString ! ! Service subclass: #Transcript instanceVariableNames: '' package: 'Kernel-Infrastructure'! !Transcript commentStamp! I am a facade for Transcript actions. I delegate actions to the currently registered transcript. ## API Transcript show: 'hello world'; cr; show: anObject.! !Transcript class methodsFor: 'instance creation'! open self current open ! ! !Transcript class methodsFor: 'printing'! clear self current clear ! cr self current show: String cr ! inspect: anObject self show: anObject ! show: anObject self current show: anObject ! ! Object subclass: #SmalltalkImage instanceVariableNames: '' package: 'Kernel-Infrastructure'! !SmalltalkImage commentStamp! I represent the Smalltalk system, wrapping operations of variable `smalltalk` declared in `js/boot.js`. ## API I have only one instance, accessed with global variable `Smalltalk`. The `smalltalk` object holds all class and packages defined in the system. ## Classes Classes can be accessed using the following methods: - `#classes` answers the full list of Smalltalk classes in the system - `#at:` answers a specific class or `nil` ## Packages Packages can be accessed using the following methods: - `#packages` answers the full list of packages - `#packageAt:` answers a specific package or `nil` ## Parsing The `#parse:` method is used to parse Amber source code. It requires the `Compiler` package and the `js/parser.js` parser file in order to work.! !SmalltalkImage methodsFor: 'accessing'! at: aString self deprecatedAPI. ^ self globals at: aString ! at: aKey ifAbsent: aBlock ^ (self includesKey: aKey) ifTrue: [ self at: aKey ] ifFalse: [ aBlock value ] ! at: aString put: anObject self deprecatedAPI. ^ self globals at: aString put: anObject ! current "Backward compatibility for Smalltalk current ..." self deprecatedAPI. ^ self ! globals "Future compatibility to be able to use Smalltalk globals at: ..." ! includesKey: aKey ! parse: aString | result | self try: [ result := self basicParse: aString ] catch: [ :ex | (self parseError: ex parsing: aString) signal ]. ^ result source: aString; yourself ! pseudoVariableNames ^ #('self' 'super' 'nil' 'true' 'false' 'thisContext') ! readJSObject: anObject ! reservedWords "JavaScript reserved words" ! version "Answer the version string of Amber" ^ '0.13.0-pre' ! vm "Future compatibility to be able to use Smalltalk vm ..." ! ! !SmalltalkImage methodsFor: 'accessing amd'! amdRequire ^ self vm at: 'amdRequire' ! defaultAmdNamespace ^ self vm defaultAmdNamespace ! defaultAmdNamespace: aString self vm defaultAmdNamespace: aString ! ! !SmalltalkImage methodsFor: 'classes'! classes ! removeClass: aClass aClass isMetaclass ifTrue: [ self error: aClass asString, ' is a Metaclass and cannot be removed!!' ]. self deleteClass: aClass. SystemAnnouncer current announce: (ClassRemoved new theClass: aClass; yourself) ! ! !SmalltalkImage methodsFor: 'error handling'! asSmalltalkException: anObject "A JavaScript exception may be thrown. We then need to convert it back to a Smalltalk object" ^ ((self isSmalltalkObject: anObject) and: [ anObject isKindOf: Error ]) ifTrue: [ anObject ] ifFalse: [ JavaScriptException on: anObject ] ! parseError: anException parsing: aString ^ ParseError new messageText: 'Parse error on line ', (anException basicAt: 'line') ,' column ' , (anException basicAt: 'column') ,' : Unexpected character ', (anException basicAt: 'found') ! ! !SmalltalkImage methodsFor: 'globals'! addGlobalJsVariable: aString self globalJsVariables add: aString ! deleteGlobalJsVariable: aString self globalJsVariables remove: aString ifAbsent:[] ! globalJsVariables "Array of global JavaScript variables" ! ! !SmalltalkImage methodsFor: 'packages'! createPackage: packageName | package announcement | package := self basicCreatePackage: packageName. announcement := PackageAdded new package: package; yourself. SystemAnnouncer current announce: announcement. ^ package ! packageAt: packageName ! packageAt: packageName ifAbsent: aBlock ^ (self packageAt: packageName) ifNil: aBlock ! packages "Return all Package instances in the system." < return Object.keys(smalltalk.packages).map(function(k) { return smalltalk.packages[k]; }) > ! removePackage: packageName "Removes a package and all its classes." | pkg | pkg := self packageAt: packageName ifAbsent: [ self error: 'Missing package: ', packageName ]. pkg classes do: [ :each | self removeClass: each ]. self deletePackage: packageName ! renamePackage: packageName to: newName "Rename a package." | pkg | pkg := self packageAt: packageName ifAbsent: [ self error: 'Missing package: ', packageName ]. (self packageAt: newName) ifNotNil: [ self error: 'Already exists a package called: ', newName ]. (self at: 'packages') at: newName put: pkg. pkg name: newName. self deletePackage: packageName. ! ! !SmalltalkImage methodsFor: 'private'! basicCreatePackage: packageName "Create and bind a new bare package with given name and return it." ! basicParse: aString ! createPackage: packageName properties: aDict "Needed to import .st files: they begin with this call." self deprecatedAPI. aDict isEmpty ifFalse: [ self error: 'createPackage:properties: called with nonempty properties' ]. ^ self createPackage: packageName ! deleteClass: aClass "Deletes a class by deleting its binding only. Use #removeClass instead" ! deletePackage: packageName "Deletes a package by deleting its binding, but does not check if it contains classes etc. To remove a package, use #removePackage instead." ! ! !SmalltalkImage methodsFor: 'testing'! isSmalltalkObject: anObject "Consider anObject a Smalltalk object if it has a 'klass' property. Note that this may be unaccurate" ! ! SmalltalkImage class instanceVariableNames: 'current'! !SmalltalkImage class methodsFor: 'initialization'! initialize globals at: 'Smalltalk' put: self current ! ! !SmalltalkImage class methodsFor: 'instance creation'! current ^ current ifNil: [ current := super new ] ifNotNil: [ self deprecatedAPI. current ] ! new self shouldNotImplement ! ! !SequenceableCollection methodsFor: '*Kernel-Infrastructure'! do: aBlock displayingProgress: aString ProgressHandler do: aBlock on: self displaying: aString ! ! !String methodsFor: '*Kernel-Infrastructure'! asJavaScriptSelector "Return first keyword of the selector, without trailing colon." ^ self replace: '^([a-zA-Z0-9]*).*$' with: '$1' ! !