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| (function(sc) {
"use strict";
require("./klass");
require("./builder");
require("../dollar");
var $ = sc.lang.$;
var strlib = sc.libs.strlib;
var metaClasses = {};
var hash = 0x100000;
function createClassInstance(MetaSpec) {
var instance = new SCClass();
instance.__MetaSpec = MetaSpec;
return instance;
}
function extend(constructor, superMetaClass) {
function F() {}
F.prototype = superMetaClass.__Spec.prototype;
constructor.prototype = new F();
function MetaF() {}
MetaF.prototype = superMetaClass.__MetaSpec.prototype;
function MetaSpec() {}
MetaSpec.prototype = new MetaF();
MetaSpec.__superClass = superMetaClass.__MetaSpec;
constructor.metaClass = createClassInstance(MetaSpec);
constructor.__superClass = superMetaClass.__Spec;
}
function throwIfInvalidClassName(className, superClassName) {
if (!strlib.isClassName(className)) {
throw new Error(strlib.format(
"sc.lang.klass.define: classname should be CamelCase, but got '#{0}'", className
));
}
if (metaClasses.hasOwnProperty(className)) {
throw new Error(strlib.format(
"sc.lang.klass.define: class '#{0}' is already defined.", className
));
}
if (className !== "Object") {
if (!metaClasses.hasOwnProperty(superClassName)) {
throw new Error(strlib.format(
"sc.lang.klass.define: superclass '#{0}' is not defined.", superClassName
));
}
}
}
function registerMetaClass(className, metaClass, constructor) {
metaClass.__className = "Meta_" + className;
metaClass.__Spec = constructor;
metaClass.__isMetaClass = true;
metaClasses[className] = sc.lang.klass._classes["Meta_" + className] = metaClass;
}
function registerClass(className, metaClass, constructor) {
var newClass = new metaClass.__MetaSpec();
newClass.__className = className;
newClass.__Spec = constructor;
newClass.__superClass = metaClass.__MetaSpec.__superClass;
Object.defineProperties(constructor.prototype, {
__class: { value: newClass, writable: true },
__Spec: { value: constructor, writable: true },
__className: { value: className, writable: true }
});
sc.lang.klass._classes[className] = newClass;
}
function buildClass(constructor, spec) {
if (typeof spec !== "function") {
return new sc.lang.klass.Builder(constructor).init(spec);
}
spec(new sc.lang.klass.Builder(constructor), sc.lang.klass.utils);
}
function __super__(that, root, funcName, args) {
var func, result;
that.__superClassP = that.__superClassP || root;
while (!func && that.__superClassP) {
func = that.__superClassP.prototype[funcName];
that.__superClassP = that.__superClassP.__superClass;
}
if (func) {
result = func.apply(that, args);
} else {
throw new Error(strlib.format("supermethod '#{0}' not found", funcName));
}
that.__superClassP = null;
return result || /* istanbul ignore next */ $.Nil();
}
var define = sc.lang.klass.define = function(className, spec) {
var items = className.split(":");
var superClassName = (items[1] || "Object").trim();
className = items[0].trim();
throwIfInvalidClassName(className, superClassName);
var constructor = spec && spec.hasOwnProperty("constructor") ?
spec.constructor : function() {
this.__super__(superClassName);
};
if (className !== "Object") {
extend(constructor, metaClasses[superClassName]);
}
var metaClass = constructor.metaClass;
registerMetaClass(className, metaClass, constructor);
registerClass (className, metaClass, constructor);
buildClass(constructor, spec);
return constructor;
};
var refine = sc.lang.klass.refine = function(className, spec) {
if (!metaClasses.hasOwnProperty(className)) {
throw new Error(strlib.format(
"sc.lang.klass.refine: class '#{0}' is not defined.", className
));
}
var constructor = metaClasses[className].__Spec;
buildClass(constructor, spec);
};
// basic classes
function SCObject() {
this._ = this;
Object.defineProperties(this, {
__immutable: { value: false, writable: true },
__hash: { value: hash++ }
});
if (this.__init__) {
this.__init__();
}
}
function SCClass() {
SCObject.call(this);
this.__isMetaClass = false;
}
SCObject.metaClass = createClassInstance(function() {});
define("Object", {
constructor: SCObject,
__tag: sc.TAG_OBJ,
__init__: function() {},
__super__: function(funcName, args) {
if (strlib.isClassName(funcName)) {
return metaClasses[funcName].__Spec.call(this);
}
return __super__(this, this.__Spec.__superClass, funcName, args);
}
});
define("Class", {
constructor: SCClass,
__super__: function(funcName, args) {
return __super__(this, this.__superClass, funcName, args);
}
});
sc.lang.klass._classes.Class = createClassInstance();
sc.lang.klass._classes.Class.__Spec = SCClass;
SCObject.metaClass.__MetaSpec.prototype = sc.lang.klass._classes.Class;
registerClass("Object", SCObject.metaClass, sc.lang.klass._classes.Object.__Spec);
refine("Object", function(builder) {
builder.addClassMethod("new", function() {
if (this.__Spec === SCClass) {
return $.Nil();
}
return new this.__Spec();
});
builder.addMethod("$", function(methodName, args) {
if (this[methodName]) {
return this[methodName].apply(this, args);
}
return this.__attr__(methodName, args);
});
builder.addMethod("__attr__", function(methodName) {
throw new Error(strlib.format(
"RECEIVER #{0}: Message '#{1}' is not understood.", this.__str__(), methodName
));
});
});
})(sc);
|