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kernel-fundamentals.js 13 KB

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  1. /* ====================================================================
  2. |
  3. | Amber Smalltalk
  4. | http://amber-lang.net
  5. |
  6. ======================================================================
  7. ======================================================================
  8. |
  9. | Copyright (c) 2010-2014
  10. | Nicolas Petton <petton.nicolas@gmail.com>
  11. |
  12. | Copyright (c) 2012-2017
  13. | The Amber team https://lolg.it/org/amber/members
  14. | Amber contributors (see /CONTRIBUTORS)
  15. |
  16. | Amber is released under the MIT license
  17. |
  18. | Permission is hereby granted, free of charge, to any person obtaining
  19. | a copy of this software and associated documentation files (the
  20. | 'Software'), to deal in the Software without restriction, including
  21. | without limitation the rights to use, copy, modify, merge, publish,
  22. | distribute, sublicense, and/or sell copies of the Software, and to
  23. | permit persons to whom the Software is furnished to do so, subject to
  24. | the following conditions:
  25. |
  26. | The above copyright notice and this permission notice shall be
  27. | included in all copies or substantial portions of the Software.
  28. |
  29. | THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
  30. | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  31. | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  32. | IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  33. | CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  34. | TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  35. | SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  36. |
  37. ==================================================================== */
  38. //jshint eqnull:true
  39. define(['./compatibility' /* TODO remove */], function () {
  40. "use strict";
  41. function inherits (child, parent) {
  42. child.prototype = Object.create(parent.prototype, {
  43. constructor: {
  44. value: child,
  45. enumerable: false, configurable: true, writable: true
  46. }
  47. });
  48. return child;
  49. }
  50. function SmalltalkGlobalsBrik (brikz, st) {
  51. // jshint evil:true
  52. var jsGlobals = new Function("return this")();
  53. var globals = Object.create(jsGlobals);
  54. globals.SmalltalkSettings = {};
  55. this.globals = globals;
  56. }
  57. // TODO kernel announcer instead of st._eventFooHappened(...args)
  58. function RootBrik (brikz, st) {
  59. /* Smalltalk foundational objects */
  60. var coreFns = this.coreFns = {};
  61. /* SmalltalkRoot is the hidden root of the normal Amber hierarchy.
  62. All objects including `ProtoObject` inherit from SmalltalkRoot.
  63. Detached roots (eg. wrapped JS classes like Number or Date)
  64. do not directly inherit from SmalltalkRoot, but employ a workaround.*/
  65. function SmalltalkRoot () {
  66. }
  67. function SmalltalkProtoObject () {
  68. }
  69. function SmalltalkObject () {
  70. }
  71. coreFns.ProtoObject = inherits(SmalltalkProtoObject, SmalltalkRoot);
  72. coreFns.Object = inherits(SmalltalkObject, SmalltalkProtoObject);
  73. this.Root = SmalltalkRoot;
  74. this.Object = SmalltalkObject;
  75. }
  76. SelectorsBrik.deps = ["selectorConversion"];
  77. function SelectorsBrik (brikz, st) {
  78. var selectorSet = Object.create(null);
  79. var selectors = this.selectors = [];
  80. var selectorPairs = this.selectorPairs = [];
  81. this.registerSelector = function (stSelector) {
  82. if (selectorSet[stSelector]) return null;
  83. var jsSelector = st.st2js(stSelector);
  84. selectorSet[stSelector] = true;
  85. selectors.push(stSelector);
  86. var pair = {st: stSelector, js: jsSelector};
  87. selectorPairs.push(pair);
  88. return pair;
  89. };
  90. st.allSelectors = function () {
  91. return selectors;
  92. };
  93. }
  94. function PackagesBrik (brikz, st) {
  95. st.packages = {};
  96. /* Add a package load descriptor to the system */
  97. st.addPackage = function (pkgName, properties) {
  98. if (!pkgName) return null;
  99. return st.packages[pkgName] = {
  100. pkgName: pkgName,
  101. properties: properties
  102. };
  103. };
  104. }
  105. BehaviorsBrik.deps = ["root", "smalltalkGlobals", "arraySet"];
  106. function BehaviorsBrik (brikz, st) {
  107. var globals = brikz.smalltalkGlobals.globals;
  108. var addElement = brikz.arraySet.addElement;
  109. var removeElement = brikz.arraySet.removeElement;
  110. /* Smalltalk classes */
  111. var classes = [];
  112. this.buildTraitOrClass = function (pkgName, builder) {
  113. var traitOrClass = globals.hasOwnProperty(builder.className) && globals[builder.className];
  114. if (traitOrClass) {
  115. if (!traitOrClass.pkg) throw new Error("Updated trait or class must have package: " + traitOrClass.className);
  116. // if (traitOrClass.pkg.pkgName !== pkgName) throw new Error("Incompatible cross-package update of trait or class: " + traitOrClass.className);
  117. builder.updateExisting(traitOrClass);
  118. } else {
  119. traitOrClass = builder.make();
  120. traitOrClass.pkg = pkgName;
  121. addTraitOrClass(traitOrClass);
  122. }
  123. return traitOrClass;
  124. };
  125. function addTraitOrClass (traitOrClass) {
  126. globals[traitOrClass.className] = traitOrClass;
  127. addElement(classes, traitOrClass);
  128. traitOrClass.added();
  129. }
  130. function removeTraitOrClass (traitOrClass) {
  131. traitOrClass.removed();
  132. removeElement(classes, traitOrClass);
  133. delete globals[traitOrClass.className];
  134. }
  135. this.removeTraitOrClass = removeTraitOrClass;
  136. /* Create an alias for an existing class */
  137. st.alias = function (traitOrClass, alias) {
  138. globals[alias] = traitOrClass;
  139. };
  140. /* Answer all registered Smalltalk classes */
  141. //TODO: remove the function and make smalltalk.classes an array
  142. st.classes = this.classes = function () {
  143. return classes;
  144. };
  145. }
  146. MethodsBrik.deps = ["behaviorProviders", "selectors", "root", "selectorConversion"];
  147. function MethodsBrik (brikz, st) {
  148. var registerSelector = brikz.selectors.registerSelector;
  149. var updateMethod = brikz.behaviorProviders.updateMethod;
  150. var SmalltalkObject = brikz.root.Object;
  151. var coreFns = brikz.root.coreFns;
  152. function SmalltalkMethod () {
  153. }
  154. coreFns.CompiledMethod = inherits(SmalltalkMethod, SmalltalkObject);
  155. /* Smalltalk method object. To add a method to a class,
  156. use api.addMethod() */
  157. st.method = function (spec) {
  158. var that = new SmalltalkMethod();
  159. var selector = spec.selector;
  160. that.selector = selector;
  161. that.jsSelector = st.st2js(selector);
  162. that.args = spec.args || {};
  163. that.protocol = spec.protocol;
  164. that.source = spec.source;
  165. that.messageSends = spec.messageSends || [];
  166. that.referencedClasses = spec.referencedClasses || [];
  167. that.fn = spec.fn;
  168. return that;
  169. };
  170. /* Add/remove a method to/from a class */
  171. st.addMethod = function (method, traitOrBehavior) {
  172. if (method.methodClass != null) {
  173. throw new Error("addMethod: Method " + method.selector + " already bound to " + method.methodClass);
  174. }
  175. method.methodClass = traitOrBehavior;
  176. registerNewSelectors(method);
  177. traitOrBehavior.localMethods[method.selector] = method;
  178. updateMethod(method.selector, traitOrBehavior);
  179. };
  180. function registerNewSelectors (method) {
  181. var newSelectors = [];
  182. function selectorInUse (stSelector) {
  183. var pair = registerSelector(stSelector);
  184. if (pair) {
  185. newSelectors.push(pair);
  186. }
  187. }
  188. selectorInUse(method.selector);
  189. method.messageSends.forEach(selectorInUse);
  190. if (st._selectorsAdded) st._selectorsAdded(newSelectors);
  191. }
  192. st.removeMethod = function (method, traitOrBehavior) {
  193. if (traitOrBehavior.localMethods[method.selector] !== method) return;
  194. delete traitOrBehavior.localMethods[method.selector];
  195. updateMethod(method.selector, traitOrBehavior);
  196. };
  197. }
  198. function BehaviorProvidersBrik (brikz, st) {
  199. this.setupMethods = function (traitOrBehavior) {
  200. traitOrBehavior.localMethods = Object.create(null);
  201. traitOrBehavior.methods = Object.create(null);
  202. };
  203. this.updateMethod = function (selector, traitOrBehavior) {
  204. var oldMethod = traitOrBehavior.methods[selector],
  205. newMethod = traitOrBehavior.localMethods[selector];
  206. if (oldMethod == null && newMethod == null) {
  207. console.warn("Removal of nonexistent method " + traitOrBehavior + " >> " + selector);
  208. return;
  209. }
  210. if (newMethod === oldMethod) return;
  211. if (newMethod != null) {
  212. traitOrBehavior.methods[selector] = newMethod;
  213. traitOrBehavior.methodAdded(newMethod);
  214. } else {
  215. delete traitOrBehavior.methods[selector];
  216. traitOrBehavior.methodRemoved(oldMethod);
  217. }
  218. if (st._methodReplaced) st._methodReplaced(newMethod, oldMethod, traitOrBehavior);
  219. };
  220. }
  221. function ArraySetBrik (brikz, st) {
  222. st.addElement = this.addElement = function (array, el) {
  223. if (typeof el === 'undefined') {
  224. return;
  225. }
  226. if (array.indexOf(el) === -1) {
  227. array.push(el);
  228. }
  229. };
  230. st.removeElement = this.removeElement = function (array, el) {
  231. var i = array.indexOf(el);
  232. if (i !== -1) {
  233. array.splice(i, 1);
  234. }
  235. };
  236. }
  237. function SelectorConversionBrik (brikz, st) {
  238. /* Convert a Smalltalk selector into a JS selector */
  239. st.st2js = function (string) {
  240. return '_' + string
  241. .replace(/:/g, '_')
  242. .replace(/[\&]/g, '_and')
  243. .replace(/[\|]/g, '_or')
  244. .replace(/[+]/g, '_plus')
  245. .replace(/-/g, '_minus')
  246. .replace(/[*]/g, '_star')
  247. .replace(/[\/]/g, '_slash')
  248. .replace(/[\\]/g, '_backslash')
  249. .replace(/[\~]/g, '_tild')
  250. .replace(/%/g, '_percent')
  251. .replace(/>/g, '_gt')
  252. .replace(/</g, '_lt')
  253. .replace(/=/g, '_eq')
  254. .replace(/,/g, '_comma')
  255. .replace(/[@]/g, '_at');
  256. };
  257. /* Convert a string to a valid smalltalk selector.
  258. if you modify the following functions, also change st2js
  259. accordingly */
  260. st.js2st = function (selector) {
  261. if (selector.match(/^__/)) {
  262. return binaryJsToSt(selector);
  263. } else {
  264. return keywordJsToSt(selector);
  265. }
  266. };
  267. function keywordJsToSt (selector) {
  268. return selector.replace(/^_/, '').replace(/_/g, ':');
  269. }
  270. function binaryJsToSt (selector) {
  271. return selector
  272. .replace(/^_/, '')
  273. .replace(/_and/g, '&')
  274. .replace(/_or/g, '|')
  275. .replace(/_plus/g, '+')
  276. .replace(/_minus/g, '-')
  277. .replace(/_star/g, '*')
  278. .replace(/_slash/g, '/')
  279. .replace(/_backslash/g, '\\')
  280. .replace(/_tild/g, '~')
  281. .replace(/_percent/g, '%')
  282. .replace(/_gt/g, '>')
  283. .replace(/_lt/g, '<')
  284. .replace(/_eq/g, '=')
  285. .replace(/_comma/g, ',')
  286. .replace(/_at/g, '@');
  287. }
  288. st.st2prop = function (stSelector) {
  289. var colonPosition = stSelector.indexOf(':');
  290. return colonPosition === -1 ? stSelector : stSelector.slice(0, colonPosition);
  291. };
  292. }
  293. /* Making smalltalk that has basic building blocks */
  294. function configureWithFundamentals (brikz) {
  295. brikz.smalltalkGlobals = SmalltalkGlobalsBrik;
  296. brikz.root = RootBrik;
  297. brikz.arraySet = ArraySetBrik;
  298. brikz.selectorConversion = SelectorConversionBrik;
  299. brikz.selectors = SelectorsBrik;
  300. brikz.packages = PackagesBrik;
  301. brikz.behaviorProviders = BehaviorProvidersBrik;
  302. brikz.behaviors = BehaviorsBrik;
  303. brikz.methods = MethodsBrik;
  304. brikz.rebuild();
  305. }
  306. return configureWithFundamentals;
  307. });