Kernel-Classes.st 17 KB

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  1. Smalltalk current createPackage: 'Kernel-Classes'!
  2. Object subclass: #Behavior
  3. instanceVariableNames: ''
  4. package: 'Kernel-Classes'!
  5. !Behavior commentStamp!
  6. Behavior is the superclass of all class objects.
  7. It defines the protocol for creating instances of a class with `#basicNew` and `#new` (see `boot.js` for class constructors details).
  8. Instances know about the subclass/superclass relationships between classes, contain the description that instances are created from,
  9. and hold the method dictionary that's associated with each class.
  10. Behavior also provides methods for compiling methods, examining the method dictionary, and iterating over the class hierarchy.!
  11. !Behavior methodsFor: 'accessing'!
  12. allInstanceVariableNames
  13. | result |
  14. result := self instanceVariableNames copy.
  15. self superclass ifNotNil: [
  16. result addAll: self superclass allInstanceVariableNames].
  17. ^result
  18. !
  19. allSelectors
  20. ^self allSuperclasses
  21. inject: self selectors
  22. into: [ :soFar :aBehavior | soFar addAll: aBehavior selectors; yourself ]
  23. !
  24. allSubclasses
  25. | result |
  26. result := self subclasses.
  27. self subclasses do: [:each |
  28. result addAll: each allSubclasses].
  29. ^result
  30. !
  31. allSuperclasses
  32. self superclass ifNil: [ ^ #() ].
  33. ^ (OrderedCollection with: self superclass)
  34. addAll: self superclass allSuperclasses;
  35. yourself
  36. !
  37. comment
  38. ^(self basicAt: 'comment') ifNil: ['']
  39. !
  40. comment: aString
  41. self basicAt: 'comment' put: aString.
  42. SystemAnnouncer current
  43. announce: (ClassCommentChanged new
  44. theClass: self;
  45. yourself)
  46. !
  47. commentStamp
  48. ^ClassCommentReader new
  49. class: self;
  50. yourself
  51. !
  52. commentStamp: aStamp prior: prior
  53. ^self commentStamp
  54. !
  55. definition
  56. ^ ''
  57. !
  58. instanceVariableNames
  59. <return self.iVarNames>
  60. !
  61. lookupSelector: selector
  62. "Look up the given selector in my methodDictionary.
  63. Return the corresponding method if found.
  64. Otherwise chase the superclass chain and try again.
  65. Return nil if no method is found."
  66. | lookupClass |
  67. lookupClass := self.
  68. [ lookupClass = nil ] whileFalse: [
  69. (lookupClass includesSelector: selector)
  70. ifTrue: [ ^ lookupClass methodAt: selector ].
  71. lookupClass := lookupClass superclass ].
  72. ^ nil
  73. !
  74. methodAt: aString
  75. ^ self methodDictionary at: aString
  76. !
  77. methodDictionary
  78. <var dict = smalltalk.HashedCollection._new();
  79. var methods = self.methods;
  80. for(var i in methods) {
  81. if(methods[i].selector) {
  82. dict._at_put_(methods[i].selector, methods[i]);
  83. }
  84. };
  85. return dict>
  86. !
  87. methods
  88. ^ self methodDictionary values
  89. !
  90. methodsFor: aString
  91. ^ClassCategoryReader new
  92. class: self category: aString;
  93. yourself
  94. !
  95. methodsFor: aString stamp: aStamp
  96. "Added for compatibility, right now ignores stamp."
  97. ^self methodsFor: aString
  98. !
  99. methodsInProtocol: aString
  100. ^ self methodDictionary values select: [ :each | each protocol = aString ]
  101. !
  102. name
  103. <return self.className || nil>
  104. !
  105. organization
  106. ^ self basicAt: 'organization'
  107. !
  108. protocols
  109. ^ self organization elements sorted
  110. !
  111. prototype
  112. <return self.fn.prototype>
  113. !
  114. selectors
  115. ^ self methodDictionary keys
  116. !
  117. subclasses
  118. <return smalltalk.subclasses(self)>
  119. !
  120. superclass
  121. <return self.superclass || nil>
  122. !
  123. theMetaClass
  124. ^ self class
  125. !
  126. theNonMetaClass
  127. ^ self
  128. !
  129. withAllSubclasses
  130. ^(Array with: self) addAll: self allSubclasses; yourself
  131. ! !
  132. !Behavior methodsFor: 'compiling'!
  133. addCompiledMethod: aMethod
  134. | oldMethod announcement |
  135. oldMethod := self methodDictionary
  136. at: aMethod selector
  137. ifAbsent: [ nil ].
  138. (self protocols includes: aMethod protocol)
  139. ifFalse: [ self organization addElement: aMethod protocol ].
  140. self basicAddCompiledMethod: aMethod.
  141. announcement := oldMethod
  142. ifNil: [
  143. MethodAdded new
  144. method: aMethod;
  145. yourself ]
  146. ifNotNil: [
  147. MethodModified new
  148. oldMethod: oldMethod;
  149. method: aMethod;
  150. yourself ].
  151. SystemAnnouncer current
  152. announce: announcement
  153. !
  154. compile: aString
  155. ^ self compile: aString category: ''
  156. !
  157. compile: aString category: anotherString
  158. ^ Compiler new
  159. install: aString
  160. forClass: self
  161. category: anotherString
  162. !
  163. removeCompiledMethod: aMethod
  164. self basicRemoveCompiledMethod: aMethod.
  165. self methods
  166. detect: [ :each | each protocol = aMethod protocol ]
  167. ifNone: [ self organization removeElement: aMethod protocol ].
  168. SystemAnnouncer current
  169. announce: (MethodRemoved new
  170. method: aMethod;
  171. yourself)
  172. ! !
  173. !Behavior methodsFor: 'enumerating'!
  174. allSubclassesDo: aBlock
  175. "Evaluate the argument, aBlock, for each of the receiver's subclasses."
  176. self subclasses do: [ :each |
  177. aBlock value: each.
  178. each allSubclassesDo: aBlock ].
  179. !
  180. protocolsDo: aBlock
  181. "Execute aBlock for each method category with
  182. its collection of methods in the sort order of category name."
  183. | methodsByCategory |
  184. methodsByCategory := HashedCollection new.
  185. self methodDictionary values do: [:m |
  186. (methodsByCategory at: m category ifAbsentPut: [Array new])
  187. add: m].
  188. self protocols do: [:category |
  189. aBlock value: category value: (methodsByCategory at: category)]
  190. ! !
  191. !Behavior methodsFor: 'instance creation'!
  192. basicNew
  193. <return new self.fn()>
  194. !
  195. new
  196. ^self basicNew initialize
  197. ! !
  198. !Behavior methodsFor: 'private'!
  199. basicAddCompiledMethod: aMethod
  200. <smalltalk.addMethod(aMethod, self)>
  201. !
  202. basicRemoveCompiledMethod: aMethod
  203. <
  204. smalltalk.removeMethod(aMethod)
  205. smalltalk.init(self);
  206. >
  207. ! !
  208. !Behavior methodsFor: 'testing'!
  209. canUnderstand: aSelector
  210. ^(self methodDictionary keys includes: aSelector asString) or: [
  211. self superclass notNil and: [self superclass canUnderstand: aSelector]]
  212. !
  213. includesBehavior: aClass
  214. ^ self == aClass or: [
  215. self inheritsFrom: aClass ]
  216. !
  217. includesSelector: aString
  218. ^ self methodDictionary includesKey: aString
  219. !
  220. inheritsFrom: aClass
  221. ^aClass allSubclasses includes: self
  222. !
  223. isBehavior
  224. ^ true
  225. ! !
  226. Behavior subclass: #Class
  227. instanceVariableNames: ''
  228. package: 'Kernel-Classes'!
  229. !Class commentStamp!
  230. Class is __the__ class object.
  231. Instances are the classes of the system.
  232. Class creation is done throught a `ClassBuilder`!
  233. !Class methodsFor: 'accessing'!
  234. category
  235. ^self package ifNil: ['Unclassified'] ifNotNil: [self package name]
  236. !
  237. definition
  238. ^ String streamContents: [ :stream |
  239. stream
  240. nextPutAll: self superclass asString;
  241. nextPutAll: ' subclass: #';
  242. nextPutAll: self name;
  243. nextPutAll: String lf, String tab;
  244. nextPutAll: 'instanceVariableNames: '''.
  245. self instanceVariableNames
  246. do: [ :each | stream nextPutAll: each ]
  247. separatedBy: [ stream nextPutAll: ' ' ].
  248. stream
  249. nextPutAll: '''', String lf, String tab;
  250. nextPutAll: 'package: ''';
  251. nextPutAll: self category;
  252. nextPutAll: '''' ]
  253. !
  254. package
  255. ^ self basicAt: 'pkg'
  256. !
  257. package: aPackage
  258. | oldPackage |
  259. oldPackage := self package.
  260. self basicAt: 'pkg' put: aPackage.
  261. oldPackage organization removeElement: self.
  262. aPackage organization addElement: self.
  263. SystemAnnouncer current announce: (ClassMoved new
  264. theClass: self;
  265. oldPackage: oldPackage;
  266. yourself)
  267. !
  268. rename: aString
  269. ClassBuilder new renameClass: self to: aString
  270. ! !
  271. !Class methodsFor: 'class creation'!
  272. subclass: aString instanceVariableNames: anotherString
  273. "Kept for compatibility."
  274. ^self subclass: aString instanceVariableNames: anotherString package: nil
  275. !
  276. subclass: aString instanceVariableNames: aString2 category: aString3
  277. "Kept for compatibility."
  278. self deprecatedAPI.
  279. ^self subclass: aString instanceVariableNames: aString2 package: aString3
  280. !
  281. subclass: aString instanceVariableNames: aString2 classVariableNames: classVars poolDictionaries: pools category: aString3
  282. "Just ignore class variables and pools. Added for compatibility."
  283. ^self subclass: aString instanceVariableNames: aString2 package: aString3
  284. !
  285. subclass: aString instanceVariableNames: aString2 package: aString3
  286. ^ClassBuilder new
  287. superclass: self subclass: aString asString instanceVariableNames: aString2 package: aString3
  288. ! !
  289. !Class methodsFor: 'converting'!
  290. asJavascript
  291. ^ 'smalltalk.', self name
  292. ! !
  293. !Class methodsFor: 'printing'!
  294. printOn: aStream
  295. aStream nextPutAll: self name
  296. ! !
  297. !Class methodsFor: 'testing'!
  298. isClass
  299. ^true
  300. ! !
  301. Behavior subclass: #Metaclass
  302. instanceVariableNames: ''
  303. package: 'Kernel-Classes'!
  304. !Metaclass commentStamp!
  305. Metaclass is the root of the class hierarchy.
  306. Metaclass instances are metaclasses, one for each real class.
  307. Metaclass instances have a single instance, which they hold onto, which is the class that they are the metaclass of.!
  308. !Metaclass methodsFor: 'accessing'!
  309. definition
  310. ^ String streamContents: [ :stream |
  311. stream
  312. nextPutAll: self asString;
  313. nextPutAll: ' instanceVariableNames: '''.
  314. self instanceVariableNames
  315. do: [ :each | stream nextPutAll: each ]
  316. separatedBy: [ stream nextPutAll: ' ' ].
  317. stream nextPutAll: '''' ]
  318. !
  319. instanceClass
  320. <return self.instanceClass>
  321. !
  322. instanceVariableNames: aCollection
  323. ClassBuilder new
  324. class: self instanceVariableNames: aCollection
  325. !
  326. theMetaClass
  327. ^ self
  328. !
  329. theNonMetaClass
  330. ^ self instanceClass
  331. ! !
  332. !Metaclass methodsFor: 'converting'!
  333. asJavascript
  334. ^ 'smalltalk.', self instanceClass name, '.klass'
  335. ! !
  336. !Metaclass methodsFor: 'printing'!
  337. printOn: aStream
  338. aStream
  339. nextPutAll: self instanceClass name;
  340. nextPutAll: ' class'
  341. ! !
  342. !Metaclass methodsFor: 'testing'!
  343. isMetaclass
  344. ^true
  345. ! !
  346. Object subclass: #ClassBuilder
  347. instanceVariableNames: ''
  348. package: 'Kernel-Classes'!
  349. !ClassBuilder commentStamp!
  350. ClassBuilder is responsible for compiling new classes or modifying existing classes in the system.
  351. Rather than using ClassBuilder directly to compile a class, use `Class >> subclass:instanceVariableNames:package:`.!
  352. !ClassBuilder methodsFor: 'accessing'!
  353. instanceVariableNamesFor: aString
  354. ^(aString tokenize: ' ') reject: [ :each | each isEmpty ]
  355. ! !
  356. !ClassBuilder methodsFor: 'class definition'!
  357. addSubclassOf: aClass named: aString instanceVariableNames: aCollection package: packageName
  358. | theClass |
  359. theClass := Smalltalk current at: aString.
  360. theClass ifNotNil: [
  361. theClass superclass == aClass ifFalse: [
  362. ^ self
  363. migrateClassNamed: aString
  364. superclass: aClass
  365. instanceVariableNames: aCollection
  366. package: packageName ] ].
  367. ^ self
  368. basicAddSubclassOf: aClass
  369. named: aString
  370. instanceVariableNames: aCollection
  371. package: packageName
  372. !
  373. class: aClass instanceVariableNames: aString
  374. self basicClass: aClass instanceVariableNames: aString.
  375. self setupClass: aClass.
  376. SystemAnnouncer current
  377. announce: (ClassDefinitionChanged new
  378. theClass: aClass;
  379. yourself)
  380. !
  381. superclass: aClass subclass: aString
  382. ^self superclass: aClass subclass: aString instanceVariableNames: '' package: nil
  383. !
  384. superclass: aClass subclass: aString instanceVariableNames: aString2 package: aString3
  385. | newClass |
  386. newClass := self addSubclassOf: aClass
  387. named: aString instanceVariableNames: (self instanceVariableNamesFor: aString2)
  388. package: (aString3 ifNil: ['unclassified']).
  389. self setupClass: newClass.
  390. SystemAnnouncer current
  391. announce: (ClassAdded new
  392. theClass: newClass;
  393. yourself).
  394. ^newClass
  395. ! !
  396. !ClassBuilder methodsFor: 'class migration'!
  397. migrateClass: aClass superclass: anotherClass
  398. console log: aClass name.
  399. self
  400. migrateClassNamed: aClass name
  401. superclass: anotherClass
  402. instanceVariableNames: aClass instanceVariableNames
  403. package: aClass package name
  404. !
  405. migrateClassNamed: aString superclass: aClass instanceVariableNames: aCollection package: packageName
  406. | oldClass newClass tmp |
  407. tmp := 'new*', aString.
  408. oldClass := Smalltalk current at: aString.
  409. newClass := self
  410. addSubclassOf: aClass
  411. named: tmp
  412. instanceVariableNames: aCollection
  413. package: packageName.
  414. self basicSwapClassNames: oldClass with: newClass.
  415. [ self copyClass: oldClass to: newClass ]
  416. on: Error
  417. do: [ :exception |
  418. self
  419. basicSwapClassNames: oldClass with: newClass;
  420. basicRemoveClass: newClass.
  421. exception signal ].
  422. self
  423. rawRenameClass: oldClass to: tmp;
  424. rawRenameClass: newClass to: aString.
  425. oldClass subclasses do: [ :each |
  426. self migrateClass: each superclass: newClass ].
  427. self basicRemoveClass: oldClass.
  428. SystemAnnouncer current announce: (ClassMigrated new
  429. theClass: newClass;
  430. oldClass: oldClass;
  431. yourself).
  432. ^newClass
  433. !
  434. renameClass: aClass to: aString
  435. self basicRenameClass: aClass to: aString.
  436. SystemAnnouncer current
  437. announce: (ClassRenamed new
  438. theClass: aClass;
  439. yourself)
  440. ! !
  441. !ClassBuilder methodsFor: 'copying'!
  442. copyClass: aClass named: aString
  443. | newClass |
  444. newClass := self
  445. addSubclassOf: aClass superclass
  446. named: aString
  447. instanceVariableNames: aClass instanceVariableNames
  448. package: aClass package name.
  449. self copyClass: aClass to: newClass.
  450. SystemAnnouncer current
  451. announce: (ClassAdded new
  452. theClass: newClass;
  453. yourself).
  454. ^newClass
  455. !
  456. copyClass: aClass to: anotherClass
  457. anotherClass comment: aClass comment.
  458. aClass methodDictionary values do: [ :each |
  459. Compiler new install: each source forClass: anotherClass category: each category ].
  460. self basicClass: anotherClass class instanceVariables: aClass class instanceVariableNames.
  461. aClass class methodDictionary values do: [ :each |
  462. Compiler new install: each source forClass: anotherClass class category: each category ].
  463. self setupClass: anotherClass
  464. ! !
  465. !ClassBuilder methodsFor: 'method definition'!
  466. installMethod: aCompiledMethod forClass: aBehavior category: aString
  467. aCompiledMethod category: aString.
  468. aBehavior addCompiledMethod: aCompiledMethod.
  469. self setupClass: aBehavior.
  470. ^aCompiledMethod
  471. ! !
  472. !ClassBuilder methodsFor: 'private'!
  473. basicAddSubclassOf: aClass named: aString instanceVariableNames: aCollection package: packageName
  474. <
  475. smalltalk.addClass(aString, aClass, aCollection, packageName);
  476. return smalltalk[aString]
  477. >
  478. !
  479. basicClass: aClass instanceVariableNames: aString
  480. self basicClass: aClass instanceVariables: (self instanceVariableNamesFor: aString)
  481. !
  482. basicClass: aClass instanceVariables: aCollection
  483. aClass isMetaclass ifFalse: [self error: aClass name, ' is not a metaclass'].
  484. aClass basicAt: 'iVarNames' put: aCollection
  485. !
  486. basicRemoveClass: aClass
  487. <smalltalk.removeClass(aClass)>
  488. !
  489. basicRenameClass: aClass to: aString
  490. <
  491. smalltalk[aString] = aClass;
  492. delete smalltalk[aClass.className];
  493. aClass.className = aString;
  494. >
  495. !
  496. basicSwapClassNames: aClass with: anotherClass
  497. <
  498. var tmp = aClass.className;
  499. aClass.className = anotherClass.className;
  500. anotherClass.className = tmp;
  501. >
  502. !
  503. rawRenameClass: aClass to: aString
  504. <
  505. smalltalk[aString] = aClass;
  506. >
  507. ! !
  508. !ClassBuilder methodsFor: 'public'!
  509. setupClass: aClass
  510. <smalltalk.init(aClass);>
  511. ! !
  512. Object subclass: #ClassCategoryReader
  513. instanceVariableNames: 'class category'
  514. package: 'Kernel-Classes'!
  515. !ClassCategoryReader commentStamp!
  516. ClassCategoryReader represents a mechanism for retrieving class descriptions stored on a file.!
  517. !ClassCategoryReader methodsFor: 'accessing'!
  518. class: aClass category: aString
  519. class := aClass.
  520. category := aString
  521. ! !
  522. !ClassCategoryReader methodsFor: 'fileIn'!
  523. scanFrom: aChunkParser
  524. | chunk |
  525. [chunk := aChunkParser nextChunk.
  526. chunk isEmpty] whileFalse: [
  527. self compileMethod: chunk].
  528. ClassBuilder new setupClass: class
  529. ! !
  530. !ClassCategoryReader methodsFor: 'initialization'!
  531. initialize
  532. super initialize.
  533. ! !
  534. !ClassCategoryReader methodsFor: 'private'!
  535. compileMethod: aString
  536. Compiler new install: aString forClass: class category: category
  537. ! !
  538. Object subclass: #ClassCommentReader
  539. instanceVariableNames: 'class'
  540. package: 'Kernel-Classes'!
  541. !ClassCommentReader commentStamp!
  542. ClassCommentReader represents a mechanism for retrieving class comments stored on a file.
  543. See `ClassCategoryReader` too.!
  544. !ClassCommentReader methodsFor: 'accessing'!
  545. class: aClass
  546. class := aClass
  547. ! !
  548. !ClassCommentReader methodsFor: 'fileIn'!
  549. scanFrom: aChunkParser
  550. | chunk |
  551. chunk := aChunkParser nextChunk.
  552. chunk isEmpty ifFalse: [
  553. self setComment: chunk].
  554. ! !
  555. !ClassCommentReader methodsFor: 'initialization'!
  556. initialize
  557. super initialize.
  558. ! !
  559. !ClassCommentReader methodsFor: 'private'!
  560. setComment: aString
  561. class comment: aString
  562. ! !
  563. Object subclass: #ClassSorterNode
  564. instanceVariableNames: 'theClass level nodes'
  565. package: 'Kernel-Classes'!
  566. !ClassSorterNode methodsFor: 'accessing'!
  567. getNodesFrom: aCollection
  568. | children others |
  569. children := #().
  570. others := #().
  571. aCollection do: [:each |
  572. (each superclass = self theClass)
  573. ifTrue: [children add: each]
  574. ifFalse: [others add: each]].
  575. nodes:= children collect: [:each |
  576. ClassSorterNode on: each classes: others level: self level + 1]
  577. !
  578. level
  579. ^level
  580. !
  581. level: anInteger
  582. level := anInteger
  583. !
  584. nodes
  585. ^nodes
  586. !
  587. theClass
  588. ^theClass
  589. !
  590. theClass: aClass
  591. theClass := aClass
  592. ! !
  593. !ClassSorterNode methodsFor: 'visiting'!
  594. traverseClassesWith: aCollection
  595. "sort classes alphabetically Issue #143"
  596. aCollection add: self theClass.
  597. (self nodes sorted: [:a :b | a theClass name <= b theClass name ]) do: [:aNode |
  598. aNode traverseClassesWith: aCollection ].
  599. ! !
  600. !ClassSorterNode class methodsFor: 'instance creation'!
  601. on: aClass classes: aCollection level: anInteger
  602. ^self new
  603. theClass: aClass;
  604. level: anInteger;
  605. getNodesFrom: aCollection;
  606. yourself
  607. ! !