1045 lines
30 KiB
JavaScript
1045 lines
30 KiB
JavaScript
define("dojo/_base/declare", ["./kernel", "../has", "./lang"], function(dojo, has, lang){
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// module:
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// dojo/_base/declare
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var mix = lang.mixin, op = Object.prototype, opts = op.toString,
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xtor = new Function, counter = 0, cname = "constructor";
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function err(msg, cls){ throw new Error("declare" + (cls ? " " + cls : "") + ": " + msg); }
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// C3 Method Resolution Order (see http://www.python.org/download/releases/2.3/mro/)
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function c3mro(bases, className){
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var result = [], roots = [{cls: 0, refs: []}], nameMap = {}, clsCount = 1,
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l = bases.length, i = 0, j, lin, base, top, proto, rec, name, refs;
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// build a list of bases naming them if needed
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for(; i < l; ++i){
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base = bases[i];
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if(!base){
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err("mixin #" + i + " is unknown. Did you use dojo.require to pull it in?", className);
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}else if(opts.call(base) != "[object Function]"){
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err("mixin #" + i + " is not a callable constructor.", className);
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}
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lin = base._meta ? base._meta.bases : [base];
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top = 0;
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// add bases to the name map
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for(j = lin.length - 1; j >= 0; --j){
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proto = lin[j].prototype;
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if(!proto.hasOwnProperty("declaredClass")){
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proto.declaredClass = "uniqName_" + (counter++);
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}
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name = proto.declaredClass;
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if(!nameMap.hasOwnProperty(name)){
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nameMap[name] = {count: 0, refs: [], cls: lin[j]};
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++clsCount;
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}
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rec = nameMap[name];
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if(top && top !== rec){
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rec.refs.push(top);
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++top.count;
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}
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top = rec;
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}
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++top.count;
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roots[0].refs.push(top);
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}
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// remove classes without external references recursively
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while(roots.length){
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top = roots.pop();
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result.push(top.cls);
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--clsCount;
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// optimization: follow a single-linked chain
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while(refs = top.refs, refs.length == 1){
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top = refs[0];
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if(!top || --top.count){
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// branch or end of chain => do not end to roots
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top = 0;
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break;
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}
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result.push(top.cls);
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--clsCount;
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}
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if(top){
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// branch
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for(i = 0, l = refs.length; i < l; ++i){
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top = refs[i];
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if(!--top.count){
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roots.push(top);
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}
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}
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}
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}
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if(clsCount){
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err("can't build consistent linearization", className);
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}
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// calculate the superclass offset
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base = bases[0];
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result[0] = base ?
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base._meta && base === result[result.length - base._meta.bases.length] ?
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base._meta.bases.length : 1 : 0;
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return result;
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}
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function inherited(args, a, f){
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var name, chains, bases, caller, meta, base, proto, opf, pos,
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cache = this._inherited = this._inherited || {};
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// crack arguments
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if(typeof args == "string"){
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name = args;
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args = a;
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a = f;
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}
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f = 0;
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caller = args.callee;
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name = name || caller.nom;
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if(!name){
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err("can't deduce a name to call inherited()", this.declaredClass);
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}
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meta = this.constructor._meta;
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bases = meta.bases;
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pos = cache.p;
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if(name != cname){
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// method
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if(cache.c !== caller){
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// cache bust
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pos = 0;
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base = bases[0];
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meta = base._meta;
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if(meta.hidden[name] !== caller){
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// error detection
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chains = meta.chains;
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if(chains && typeof chains[name] == "string"){
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err("calling chained method with inherited: " + name, this.declaredClass);
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}
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// find caller
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do{
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meta = base._meta;
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proto = base.prototype;
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if(meta && (proto[name] === caller && proto.hasOwnProperty(name) || meta.hidden[name] === caller)){
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break;
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}
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}while(base = bases[++pos]); // intentional assignment
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pos = base ? pos : -1;
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}
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}
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// find next
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base = bases[++pos];
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if(base){
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proto = base.prototype;
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if(base._meta && proto.hasOwnProperty(name)){
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f = proto[name];
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}else{
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opf = op[name];
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do{
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proto = base.prototype;
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f = proto[name];
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if(f && (base._meta ? proto.hasOwnProperty(name) : f !== opf)){
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break;
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}
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}while(base = bases[++pos]); // intentional assignment
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}
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}
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f = base && f || op[name];
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}else{
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// constructor
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if(cache.c !== caller){
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// cache bust
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pos = 0;
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meta = bases[0]._meta;
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if(meta && meta.ctor !== caller){
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// error detection
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chains = meta.chains;
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if(!chains || chains.constructor !== "manual"){
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err("calling chained constructor with inherited", this.declaredClass);
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}
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// find caller
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while(base = bases[++pos]){ // intentional assignment
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meta = base._meta;
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if(meta && meta.ctor === caller){
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break;
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}
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}
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pos = base ? pos : -1;
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}
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}
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// find next
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while(base = bases[++pos]){ // intentional assignment
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meta = base._meta;
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f = meta ? meta.ctor : base;
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if(f){
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break;
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}
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}
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f = base && f;
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}
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// cache the found super method
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cache.c = f;
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cache.p = pos;
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// now we have the result
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if(f){
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return a === true ? f : f.apply(this, a || args);
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}
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// intentionally no return if a super method was not found
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}
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function getInherited(name, args){
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if(typeof name == "string"){
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return this.__inherited(name, args, true);
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}
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return this.__inherited(name, true);
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}
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function inherited__debug(args, a1, a2){
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var f = this.getInherited(args, a1);
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if(f){ return f.apply(this, a2 || a1 || args); }
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// intentionally no return if a super method was not found
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}
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var inheritedImpl = dojo.config.isDebug ? inherited__debug : inherited;
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// emulation of "instanceof"
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function isInstanceOf(cls){
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var bases = this.constructor._meta.bases;
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for(var i = 0, l = bases.length; i < l; ++i){
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if(bases[i] === cls){
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return true;
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}
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}
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return this instanceof cls;
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}
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function mixOwn(target, source){
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// add props adding metadata for incoming functions skipping a constructor
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for(var name in source){
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if(name != cname && source.hasOwnProperty(name)){
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target[name] = source[name];
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}
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}
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if(has("bug-for-in-skips-shadowed")){
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for(var extraNames= lang._extraNames, i= extraNames.length; i;){
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name = extraNames[--i];
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if(name != cname && source.hasOwnProperty(name)){
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target[name] = source[name];
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}
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}
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}
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}
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// implementation of safe mixin function
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function safeMixin(target, source){
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// summary:
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// Mix in properties skipping a constructor and decorating functions
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// like it is done by declare().
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// target: Object
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// Target object to accept new properties.
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// source: Object
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// Source object for new properties.
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// description:
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// This function is used to mix in properties like lang.mixin does,
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// but it skips a constructor property and decorates functions like
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// declare() does.
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//
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// It is meant to be used with classes and objects produced with
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// declare. Functions mixed in with dojo.safeMixin can use
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// this.inherited() like normal methods.
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//
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// This function is used to implement extend() method of a constructor
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// produced with declare().
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//
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// example:
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// | var A = declare(null, {
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// | m1: function(){
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// | console.log("A.m1");
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// | },
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// | m2: function(){
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// | console.log("A.m2");
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// | }
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// | });
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// | var B = declare(A, {
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// | m1: function(){
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// | this.inherited(arguments);
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// | console.log("B.m1");
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// | }
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// | });
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// | B.extend({
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// | m2: function(){
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// | this.inherited(arguments);
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// | console.log("B.m2");
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// | }
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// | });
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// | var x = new B();
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// | dojo.safeMixin(x, {
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// | m1: function(){
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// | this.inherited(arguments);
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// | console.log("X.m1");
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// | },
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// | m2: function(){
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// | this.inherited(arguments);
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// | console.log("X.m2");
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// | }
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// | });
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// | x.m2();
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// | // prints:
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// | // A.m1
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// | // B.m1
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// | // X.m1
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var name, t;
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// add props adding metadata for incoming functions skipping a constructor
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for(name in source){
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t = source[name];
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if((t !== op[name] || !(name in op)) && name != cname){
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if(opts.call(t) == "[object Function]"){
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// non-trivial function method => attach its name
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t.nom = name;
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}
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target[name] = t;
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}
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}
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if(has("bug-for-in-skips-shadowed")){
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for(var extraNames= lang._extraNames, i= extraNames.length; i;){
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name = extraNames[--i];
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t = source[name];
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if((t !== op[name] || !(name in op)) && name != cname){
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if(opts.call(t) == "[object Function]"){
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// non-trivial function method => attach its name
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t.nom = name;
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}
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target[name] = t;
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}
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}
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}
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return target;
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}
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function extend(source){
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declare.safeMixin(this.prototype, source);
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return this;
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}
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function createSubclass(mixins){
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return declare([this].concat(mixins));
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}
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// chained constructor compatible with the legacy declare()
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function chainedConstructor(bases, ctorSpecial){
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return function(){
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var a = arguments, args = a, a0 = a[0], f, i, m,
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l = bases.length, preArgs;
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if(!(this instanceof a.callee)){
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// not called via new, so force it
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return applyNew(a);
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}
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//this._inherited = {};
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// perform the shaman's rituals of the original declare()
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// 1) call two types of the preamble
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if(ctorSpecial && (a0 && a0.preamble || this.preamble)){
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// full blown ritual
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preArgs = new Array(bases.length);
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// prepare parameters
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preArgs[0] = a;
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for(i = 0;;){
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// process the preamble of the 1st argument
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a0 = a[0];
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if(a0){
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f = a0.preamble;
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if(f){
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a = f.apply(this, a) || a;
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}
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}
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// process the preamble of this class
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f = bases[i].prototype;
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f = f.hasOwnProperty("preamble") && f.preamble;
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if(f){
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a = f.apply(this, a) || a;
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}
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// one peculiarity of the preamble:
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// it is called if it is not needed,
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// e.g., there is no constructor to call
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// let's watch for the last constructor
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// (see ticket #9795)
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if(++i == l){
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break;
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}
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preArgs[i] = a;
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}
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}
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// 2) call all non-trivial constructors using prepared arguments
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for(i = l - 1; i >= 0; --i){
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f = bases[i];
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m = f._meta;
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f = m ? m.ctor : f;
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if(f){
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f.apply(this, preArgs ? preArgs[i] : a);
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}
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}
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// 3) continue the original ritual: call the postscript
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f = this.postscript;
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if(f){
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f.apply(this, args);
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}
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};
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}
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// chained constructor compatible with the legacy declare()
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function singleConstructor(ctor, ctorSpecial){
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return function(){
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var a = arguments, t = a, a0 = a[0], f;
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if(!(this instanceof a.callee)){
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// not called via new, so force it
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return applyNew(a);
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}
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//this._inherited = {};
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// perform the shaman's rituals of the original declare()
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// 1) call two types of the preamble
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if(ctorSpecial){
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// full blown ritual
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if(a0){
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// process the preamble of the 1st argument
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f = a0.preamble;
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if(f){
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t = f.apply(this, t) || t;
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}
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}
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f = this.preamble;
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if(f){
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// process the preamble of this class
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f.apply(this, t);
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// one peculiarity of the preamble:
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// it is called even if it is not needed,
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// e.g., there is no constructor to call
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// let's watch for the last constructor
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// (see ticket #9795)
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}
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}
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// 2) call a constructor
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if(ctor){
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ctor.apply(this, a);
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}
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// 3) continue the original ritual: call the postscript
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f = this.postscript;
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if(f){
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f.apply(this, a);
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}
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};
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}
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// plain vanilla constructor (can use inherited() to call its base constructor)
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function simpleConstructor(bases){
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return function(){
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var a = arguments, i = 0, f, m;
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if(!(this instanceof a.callee)){
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// not called via new, so force it
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return applyNew(a);
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}
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//this._inherited = {};
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// perform the shaman's rituals of the original declare()
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// 1) do not call the preamble
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// 2) call the top constructor (it can use this.inherited())
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for(; f = bases[i]; ++i){ // intentional assignment
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m = f._meta;
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f = m ? m.ctor : f;
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if(f){
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f.apply(this, a);
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break;
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}
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}
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// 3) call the postscript
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f = this.postscript;
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if(f){
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f.apply(this, a);
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}
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};
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}
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function chain(name, bases, reversed){
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return function(){
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var b, m, f, i = 0, step = 1;
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if(reversed){
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i = bases.length - 1;
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step = -1;
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}
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for(; b = bases[i]; i += step){ // intentional assignment
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m = b._meta;
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f = (m ? m.hidden : b.prototype)[name];
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if(f){
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f.apply(this, arguments);
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}
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}
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};
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}
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|
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// forceNew(ctor)
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// return a new object that inherits from ctor.prototype but
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// without actually running ctor on the object.
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function forceNew(ctor){
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// create object with correct prototype using a do-nothing
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// constructor
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xtor.prototype = ctor.prototype;
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var t = new xtor;
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xtor.prototype = null; // clean up
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return t;
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}
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|
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// applyNew(args)
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// just like 'new ctor()' except that the constructor and its arguments come
|
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// from args, which must be an array or an arguments object
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function applyNew(args){
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// create an object with ctor's prototype but without
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// calling ctor on it.
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var ctor = args.callee, t = forceNew(ctor);
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// execute the real constructor on the new object
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ctor.apply(t, args);
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return t;
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}
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|
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function declare(className, superclass, props){
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// summary:
|
|
// Create a feature-rich constructor from compact notation.
|
|
// className: String?
|
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// The optional name of the constructor (loosely, a "class")
|
|
// stored in the "declaredClass" property in the created prototype.
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// It will be used as a global name for a created constructor.
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// superclass: Function|Function[]
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// May be null, a Function, or an Array of Functions. This argument
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// specifies a list of bases (the left-most one is the most deepest
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// base).
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// props: Object
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// An object whose properties are copied to the created prototype.
|
|
// Add an instance-initialization function by making it a property
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|
// named "constructor".
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|
// returns: dojo/_base/declare.__DeclareCreatedObject
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// New constructor function.
|
|
// description:
|
|
// Create a constructor using a compact notation for inheritance and
|
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// prototype extension.
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//
|
|
// Mixin ancestors provide a type of multiple inheritance.
|
|
// Prototypes of mixin ancestors are copied to the new class:
|
|
// changes to mixin prototypes will not affect classes to which
|
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// they have been mixed in.
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//
|
|
// Ancestors can be compound classes created by this version of
|
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// declare(). In complex cases all base classes are going to be
|
|
// linearized according to C3 MRO algorithm
|
|
// (see http://www.python.org/download/releases/2.3/mro/ for more
|
|
// details).
|
|
//
|
|
// "className" is cached in "declaredClass" property of the new class,
|
|
// if it was supplied. The immediate super class will be cached in
|
|
// "superclass" property of the new class.
|
|
//
|
|
// Methods in "props" will be copied and modified: "nom" property
|
|
// (the declared name of the method) will be added to all copied
|
|
// functions to help identify them for the internal machinery. Be
|
|
// very careful, while reusing methods: if you use the same
|
|
// function under different names, it can produce errors in some
|
|
// cases.
|
|
//
|
|
// It is possible to use constructors created "manually" (without
|
|
// declare()) as bases. They will be called as usual during the
|
|
// creation of an instance, their methods will be chained, and even
|
|
// called by "this.inherited()".
|
|
//
|
|
// Special property "-chains-" governs how to chain methods. It is
|
|
// a dictionary, which uses method names as keys, and hint strings
|
|
// as values. If a hint string is "after", this method will be
|
|
// called after methods of its base classes. If a hint string is
|
|
// "before", this method will be called before methods of its base
|
|
// classes.
|
|
//
|
|
// If "constructor" is not mentioned in "-chains-" property, it will
|
|
// be chained using the legacy mode: using "after" chaining,
|
|
// calling preamble() method before each constructor, if available,
|
|
// and calling postscript() after all constructors were executed.
|
|
// If the hint is "after", it is chained as a regular method, but
|
|
// postscript() will be called after the chain of constructors.
|
|
// "constructor" cannot be chained "before", but it allows
|
|
// a special hint string: "manual", which means that constructors
|
|
// are not going to be chained in any way, and programmer will call
|
|
// them manually using this.inherited(). In the latter case
|
|
// postscript() will be called after the construction.
|
|
//
|
|
// All chaining hints are "inherited" from base classes and
|
|
// potentially can be overridden. Be very careful when overriding
|
|
// hints! Make sure that all chained methods can work in a proposed
|
|
// manner of chaining.
|
|
//
|
|
// Once a method was chained, it is impossible to unchain it. The
|
|
// only exception is "constructor". You don't need to define a
|
|
// method in order to supply a chaining hint.
|
|
//
|
|
// If a method is chained, it cannot use this.inherited() because
|
|
// all other methods in the hierarchy will be called automatically.
|
|
//
|
|
// Usually constructors and initializers of any kind are chained
|
|
// using "after" and destructors of any kind are chained as
|
|
// "before". Note that chaining assumes that chained methods do not
|
|
// return any value: any returned value will be discarded.
|
|
//
|
|
// example:
|
|
// | declare("my.classes.bar", my.classes.foo, {
|
|
// | // properties to be added to the class prototype
|
|
// | someValue: 2,
|
|
// | // initialization function
|
|
// | constructor: function(){
|
|
// | this.myComplicatedObject = new ReallyComplicatedObject();
|
|
// | },
|
|
// | // other functions
|
|
// | someMethod: function(){
|
|
// | doStuff();
|
|
// | }
|
|
// | });
|
|
//
|
|
// example:
|
|
// | var MyBase = declare(null, {
|
|
// | // constructor, properties, and methods go here
|
|
// | // ...
|
|
// | });
|
|
// | var MyClass1 = declare(MyBase, {
|
|
// | // constructor, properties, and methods go here
|
|
// | // ...
|
|
// | });
|
|
// | var MyClass2 = declare(MyBase, {
|
|
// | // constructor, properties, and methods go here
|
|
// | // ...
|
|
// | });
|
|
// | var MyDiamond = declare([MyClass1, MyClass2], {
|
|
// | // constructor, properties, and methods go here
|
|
// | // ...
|
|
// | });
|
|
//
|
|
// example:
|
|
// | var F = function(){ console.log("raw constructor"); };
|
|
// | F.prototype.method = function(){
|
|
// | console.log("raw method");
|
|
// | };
|
|
// | var A = declare(F, {
|
|
// | constructor: function(){
|
|
// | console.log("A.constructor");
|
|
// | },
|
|
// | method: function(){
|
|
// | console.log("before calling F.method...");
|
|
// | this.inherited(arguments);
|
|
// | console.log("...back in A");
|
|
// | }
|
|
// | });
|
|
// | new A().method();
|
|
// | // will print:
|
|
// | // raw constructor
|
|
// | // A.constructor
|
|
// | // before calling F.method...
|
|
// | // raw method
|
|
// | // ...back in A
|
|
//
|
|
// example:
|
|
// | var A = declare(null, {
|
|
// | "-chains-": {
|
|
// | destroy: "before"
|
|
// | }
|
|
// | });
|
|
// | var B = declare(A, {
|
|
// | constructor: function(){
|
|
// | console.log("B.constructor");
|
|
// | },
|
|
// | destroy: function(){
|
|
// | console.log("B.destroy");
|
|
// | }
|
|
// | });
|
|
// | var C = declare(B, {
|
|
// | constructor: function(){
|
|
// | console.log("C.constructor");
|
|
// | },
|
|
// | destroy: function(){
|
|
// | console.log("C.destroy");
|
|
// | }
|
|
// | });
|
|
// | new C().destroy();
|
|
// | // prints:
|
|
// | // B.constructor
|
|
// | // C.constructor
|
|
// | // C.destroy
|
|
// | // B.destroy
|
|
//
|
|
// example:
|
|
// | var A = declare(null, {
|
|
// | "-chains-": {
|
|
// | constructor: "manual"
|
|
// | }
|
|
// | });
|
|
// | var B = declare(A, {
|
|
// | constructor: function(){
|
|
// | // ...
|
|
// | // call the base constructor with new parameters
|
|
// | this.inherited(arguments, [1, 2, 3]);
|
|
// | // ...
|
|
// | }
|
|
// | });
|
|
//
|
|
// example:
|
|
// | var A = declare(null, {
|
|
// | "-chains-": {
|
|
// | m1: "before"
|
|
// | },
|
|
// | m1: function(){
|
|
// | console.log("A.m1");
|
|
// | },
|
|
// | m2: function(){
|
|
// | console.log("A.m2");
|
|
// | }
|
|
// | });
|
|
// | var B = declare(A, {
|
|
// | "-chains-": {
|
|
// | m2: "after"
|
|
// | },
|
|
// | m1: function(){
|
|
// | console.log("B.m1");
|
|
// | },
|
|
// | m2: function(){
|
|
// | console.log("B.m2");
|
|
// | }
|
|
// | });
|
|
// | var x = new B();
|
|
// | x.m1();
|
|
// | // prints:
|
|
// | // B.m1
|
|
// | // A.m1
|
|
// | x.m2();
|
|
// | // prints:
|
|
// | // A.m2
|
|
// | // B.m2
|
|
|
|
// crack parameters
|
|
if(typeof className != "string"){
|
|
props = superclass;
|
|
superclass = className;
|
|
className = "";
|
|
}
|
|
props = props || {};
|
|
|
|
var proto, i, t, ctor, name, bases, chains, mixins = 1, parents = superclass;
|
|
|
|
// build a prototype
|
|
if(opts.call(superclass) == "[object Array]"){
|
|
// C3 MRO
|
|
bases = c3mro(superclass, className);
|
|
t = bases[0];
|
|
mixins = bases.length - t;
|
|
superclass = bases[mixins];
|
|
}else{
|
|
bases = [0];
|
|
if(superclass){
|
|
if(opts.call(superclass) == "[object Function]"){
|
|
t = superclass._meta;
|
|
bases = bases.concat(t ? t.bases : superclass);
|
|
}else{
|
|
err("base class is not a callable constructor.", className);
|
|
}
|
|
}else if(superclass !== null){
|
|
err("unknown base class. Did you use dojo.require to pull it in?", className);
|
|
}
|
|
}
|
|
if(superclass){
|
|
for(i = mixins - 1;; --i){
|
|
proto = forceNew(superclass);
|
|
if(!i){
|
|
// stop if nothing to add (the last base)
|
|
break;
|
|
}
|
|
// mix in properties
|
|
t = bases[i];
|
|
(t._meta ? mixOwn : mix)(proto, t.prototype);
|
|
// chain in new constructor
|
|
ctor = new Function;
|
|
ctor.superclass = superclass;
|
|
ctor.prototype = proto;
|
|
superclass = proto.constructor = ctor;
|
|
}
|
|
}else{
|
|
proto = {};
|
|
}
|
|
// add all properties
|
|
declare.safeMixin(proto, props);
|
|
// add constructor
|
|
t = props.constructor;
|
|
if(t !== op.constructor){
|
|
t.nom = cname;
|
|
proto.constructor = t;
|
|
}
|
|
|
|
// collect chains and flags
|
|
for(i = mixins - 1; i; --i){ // intentional assignment
|
|
t = bases[i]._meta;
|
|
if(t && t.chains){
|
|
chains = mix(chains || {}, t.chains);
|
|
}
|
|
}
|
|
if(proto["-chains-"]){
|
|
chains = mix(chains || {}, proto["-chains-"]);
|
|
}
|
|
|
|
// build ctor
|
|
t = !chains || !chains.hasOwnProperty(cname);
|
|
bases[0] = ctor = (chains && chains.constructor === "manual") ? simpleConstructor(bases) :
|
|
(bases.length == 1 ? singleConstructor(props.constructor, t) : chainedConstructor(bases, t));
|
|
|
|
// add meta information to the constructor
|
|
ctor._meta = {bases: bases, hidden: props, chains: chains,
|
|
parents: parents, ctor: props.constructor};
|
|
ctor.superclass = superclass && superclass.prototype;
|
|
ctor.extend = extend;
|
|
ctor.createSubclass = createSubclass;
|
|
ctor.prototype = proto;
|
|
proto.constructor = ctor;
|
|
|
|
// add "standard" methods to the prototype
|
|
proto.getInherited = getInherited;
|
|
proto.isInstanceOf = isInstanceOf;
|
|
proto.inherited = inheritedImpl;
|
|
proto.__inherited = inherited;
|
|
|
|
// add name if specified
|
|
if(className){
|
|
proto.declaredClass = className;
|
|
lang.setObject(className, ctor);
|
|
}
|
|
|
|
// build chains and add them to the prototype
|
|
if(chains){
|
|
for(name in chains){
|
|
if(proto[name] && typeof chains[name] == "string" && name != cname){
|
|
t = proto[name] = chain(name, bases, chains[name] === "after");
|
|
t.nom = name;
|
|
}
|
|
}
|
|
}
|
|
// chained methods do not return values
|
|
// no need to chain "invisible" functions
|
|
|
|
return ctor; // Function
|
|
}
|
|
|
|
/*=====
|
|
declare.__DeclareCreatedObject = {
|
|
// summary:
|
|
// dojo/_base/declare() returns a constructor `C`. `new C()` returns an Object with the following
|
|
// methods, in addition to the methods and properties specified via the arguments passed to declare().
|
|
|
|
inherited: function(name, args, newArgs){
|
|
// summary:
|
|
// Calls a super method.
|
|
// name: String?
|
|
// The optional method name. Should be the same as the caller's
|
|
// name. Usually "name" is specified in complex dynamic cases, when
|
|
// the calling method was dynamically added, undecorated by
|
|
// declare(), and it cannot be determined.
|
|
// args: Arguments
|
|
// The caller supply this argument, which should be the original
|
|
// "arguments".
|
|
// newArgs: Object?
|
|
// If "true", the found function will be returned without
|
|
// executing it.
|
|
// If Array, it will be used to call a super method. Otherwise
|
|
// "args" will be used.
|
|
// returns:
|
|
// Whatever is returned by a super method, or a super method itself,
|
|
// if "true" was specified as newArgs.
|
|
// description:
|
|
// This method is used inside method of classes produced with
|
|
// declare() to call a super method (next in the chain). It is
|
|
// used for manually controlled chaining. Consider using the regular
|
|
// chaining, because it is faster. Use "this.inherited()" only in
|
|
// complex cases.
|
|
//
|
|
// This method cannot me called from automatically chained
|
|
// constructors including the case of a special (legacy)
|
|
// constructor chaining. It cannot be called from chained methods.
|
|
//
|
|
// If "this.inherited()" cannot find the next-in-chain method, it
|
|
// does nothing and returns "undefined". The last method in chain
|
|
// can be a default method implemented in Object, which will be
|
|
// called last.
|
|
//
|
|
// If "name" is specified, it is assumed that the method that
|
|
// received "args" is the parent method for this call. It is looked
|
|
// up in the chain list and if it is found the next-in-chain method
|
|
// is called. If it is not found, the first-in-chain method is
|
|
// called.
|
|
//
|
|
// If "name" is not specified, it will be derived from the calling
|
|
// method (using a methoid property "nom").
|
|
//
|
|
// example:
|
|
// | var B = declare(A, {
|
|
// | method1: function(a, b, c){
|
|
// | this.inherited(arguments);
|
|
// | },
|
|
// | method2: function(a, b){
|
|
// | return this.inherited(arguments, [a + b]);
|
|
// | }
|
|
// | });
|
|
// | // next method is not in the chain list because it is added
|
|
// | // manually after the class was created.
|
|
// | B.prototype.method3 = function(){
|
|
// | console.log("This is a dynamically-added method.");
|
|
// | this.inherited("method3", arguments);
|
|
// | };
|
|
// example:
|
|
// | var B = declare(A, {
|
|
// | method: function(a, b){
|
|
// | var super = this.inherited(arguments, true);
|
|
// | // ...
|
|
// | if(!super){
|
|
// | console.log("there is no super method");
|
|
// | return 0;
|
|
// | }
|
|
// | return super.apply(this, arguments);
|
|
// | }
|
|
// | });
|
|
return {}; // Object
|
|
},
|
|
|
|
getInherited: function(name, args){
|
|
// summary:
|
|
// Returns a super method.
|
|
// name: String?
|
|
// The optional method name. Should be the same as the caller's
|
|
// name. Usually "name" is specified in complex dynamic cases, when
|
|
// the calling method was dynamically added, undecorated by
|
|
// declare(), and it cannot be determined.
|
|
// args: Arguments
|
|
// The caller supply this argument, which should be the original
|
|
// "arguments".
|
|
// returns:
|
|
// Returns a super method (Function) or "undefined".
|
|
// description:
|
|
// This method is a convenience method for "this.inherited()".
|
|
// It uses the same algorithm but instead of executing a super
|
|
// method, it returns it, or "undefined" if not found.
|
|
//
|
|
// example:
|
|
// | var B = declare(A, {
|
|
// | method: function(a, b){
|
|
// | var super = this.getInherited(arguments);
|
|
// | // ...
|
|
// | if(!super){
|
|
// | console.log("there is no super method");
|
|
// | return 0;
|
|
// | }
|
|
// | return super.apply(this, arguments);
|
|
// | }
|
|
// | });
|
|
return {}; // Object
|
|
},
|
|
|
|
isInstanceOf: function(cls){
|
|
// summary:
|
|
// Checks the inheritance chain to see if it is inherited from this
|
|
// class.
|
|
// cls: Function
|
|
// Class constructor.
|
|
// returns:
|
|
// "true", if this object is inherited from this class, "false"
|
|
// otherwise.
|
|
// description:
|
|
// This method is used with instances of classes produced with
|
|
// declare() to determine of they support a certain interface or
|
|
// not. It models "instanceof" operator.
|
|
//
|
|
// example:
|
|
// | var A = declare(null, {
|
|
// | // constructor, properties, and methods go here
|
|
// | // ...
|
|
// | });
|
|
// | var B = declare(null, {
|
|
// | // constructor, properties, and methods go here
|
|
// | // ...
|
|
// | });
|
|
// | var C = declare([A, B], {
|
|
// | // constructor, properties, and methods go here
|
|
// | // ...
|
|
// | });
|
|
// | var D = declare(A, {
|
|
// | // constructor, properties, and methods go here
|
|
// | // ...
|
|
// | });
|
|
// |
|
|
// | var a = new A(), b = new B(), c = new C(), d = new D();
|
|
// |
|
|
// | console.log(a.isInstanceOf(A)); // true
|
|
// | console.log(b.isInstanceOf(A)); // false
|
|
// | console.log(c.isInstanceOf(A)); // true
|
|
// | console.log(d.isInstanceOf(A)); // true
|
|
// |
|
|
// | console.log(a.isInstanceOf(B)); // false
|
|
// | console.log(b.isInstanceOf(B)); // true
|
|
// | console.log(c.isInstanceOf(B)); // true
|
|
// | console.log(d.isInstanceOf(B)); // false
|
|
// |
|
|
// | console.log(a.isInstanceOf(C)); // false
|
|
// | console.log(b.isInstanceOf(C)); // false
|
|
// | console.log(c.isInstanceOf(C)); // true
|
|
// | console.log(d.isInstanceOf(C)); // false
|
|
// |
|
|
// | console.log(a.isInstanceOf(D)); // false
|
|
// | console.log(b.isInstanceOf(D)); // false
|
|
// | console.log(c.isInstanceOf(D)); // false
|
|
// | console.log(d.isInstanceOf(D)); // true
|
|
return {}; // Object
|
|
},
|
|
|
|
extend: function(source){
|
|
// summary:
|
|
// Adds all properties and methods of source to constructor's
|
|
// prototype, making them available to all instances created with
|
|
// constructor. This method is specific to constructors created with
|
|
// declare().
|
|
// source: Object
|
|
// Source object which properties are going to be copied to the
|
|
// constructor's prototype.
|
|
// description:
|
|
// Adds source properties to the constructor's prototype. It can
|
|
// override existing properties.
|
|
//
|
|
// This method is similar to dojo.extend function, but it is specific
|
|
// to constructors produced by declare(). It is implemented
|
|
// using dojo.safeMixin, and it skips a constructor property,
|
|
// and properly decorates copied functions.
|
|
//
|
|
// example:
|
|
// | var A = declare(null, {
|
|
// | m1: function(){},
|
|
// | s1: "Popokatepetl"
|
|
// | });
|
|
// | A.extend({
|
|
// | m1: function(){},
|
|
// | m2: function(){},
|
|
// | f1: true,
|
|
// | d1: 42
|
|
// | });
|
|
}
|
|
};
|
|
=====*/
|
|
|
|
// For back-compat, remove for 2.0
|
|
dojo.safeMixin = declare.safeMixin = safeMixin;
|
|
dojo.declare = declare;
|
|
|
|
return declare;
|
|
});
|