source: Dev/trunk/src/client/dojox/lang/docs.js @ 529

dojo.provide("dojox.lang.docs");

// Extracts information from the API docs to apply a schema representation to dojo classes.
// This can be utilized for runtime metadata retrieval and type checking
(function(){
        function error(error){
                console.log("Warning, the API docs must be available at ../util/docscripts/api.json "+
                "or ../util/docscripts/api/*.json "+
                "in order for dojox.lang.docs to supply schema information, but it could not be loaded: " + error);
        }

        var declaredClasses = {};
        var requiredModules = [];
        var _docs = dojox.lang.docs._loadedDocs = {};

        var schemifyClass = function(clazz, name){
                // initial implementation records classes until they are ready
                declaredClasses[name] = clazz;
        };
        var getType = function(typeDef){
                var type = typeDef.type || '';
                var typeObj, optional = false, array = false, dontModify;
                type = type.replace(/\?/, function(){
                        optional = true;
                        return '';
                });
                type = type.replace(/\[\]/, function(){
                        array = true;
                        return '';
                });
                if(type.match(/HTML/)){
                        // HTML String and other "types" of strings are really just strings
                        type = "string";
                }else if(type == 'String' || type == 'Number' ||
                                type == 'Boolean' || type == 'Object' ||
                                type == 'Array' || type == 'Integer' || type == "Function"){
                        type = type.toLowerCase();
                }else if(type == "bool"){
                        type = "boolean";
                }else if(type){
                        typeObj = dojo.getObject(type) || {};
                        dontModify = true;
                }else{
                        typeObj = {};
                }
                typeObj = typeObj || {type:type};
                if(array){
                        typeObj = {items:typeObj, type:"array"};
                        dontModify = false;
                }
                if(!dontModify){
                        if(optional){
                                typeObj.optional = true;
                        }
                        if(/const/.test(typeDef.tags)){
                                typeObj.readonly = true;
                        }
                }
                return typeObj;
        };
        var actualSchemifyClass = function(clazz, name){
                var docForClass = _docs[name];
                if(docForClass){
                        clazz.description = docForClass.description;
                        clazz.properties = {};
                        clazz.methods = {};

                        if(docForClass.properties){
                                var props = docForClass.properties;
                                for(var i=0, l=props.length; i<l; i++){
                                        if(props[i].scope == "prototype"){
                                                var propDef = clazz.properties[props[i].name] = getType(props[i]);
                                                propDef.description = props[i].summary;
                                        }
                                }
                        }

                        // translate the methods to JSON Schema
                        if(docForClass.methods){
                                var methods = docForClass.methods;
                                for(i=0, l=methods.length; i<l; i++){
                                        name = methods[i].name;
                                        if(name && methods[i].scope == "prototype"){
                                                var methodDef = clazz.methods[name] = {};
                                                methodDef.description = methods[i].summary;
                                                var parameters = methods[i].parameters;
                                                if(parameters){
                                                        methodDef.parameters = [];
                                                        for(var j=0, k=parameters.length; j<k; j++){
                                                                var param = parameters[j];
                                                                var paramDef = methodDef.parameters[j] = getType(param);
                                                                paramDef.name = param.name;
                                                                paramDef.optional = "optional" == param.usage;
                                                        }
                                                }
                                                var ret = methods[i]['return-types'];
                                                if(ret && ret[0]){
                                                        var returns = getType(ret[0]);
                                                        if(returns.type){
                                                                methodDef.returns = returns;
                                                        }
                                                }
                                        }
                                }
                        }

                        var superclass = docForClass.superclass;
                        if(superclass){
                                clazz["extends"] = dojo.getObject(superclass);
                        }
                }
        };
        var requireDocs = function(moduleName){
                requiredModules.push(moduleName);
        };

        // hook into all declared classes
        var defaultDeclare = dojo.declare;
        dojo.declare = function(name){
                var clazz = defaultDeclare.apply(this, arguments);
                schemifyClass(clazz, name);
                return clazz;
        };
        dojo.mixin(dojo.declare, defaultDeclare);
        var initialized;

        // hook into dojo.require
        var defaultRequire = dojo.require;
        dojo.require = function(moduleName){
                requireDocs(moduleName);
                var module = defaultRequire.apply(this, arguments);
                return module;
        };

        dojox.lang.docs.init = function(/*Boolean*/async){
                // summary:
                //              Loads the documentation and applies it to the previously defined classes
                //              and any future defined classes
                // async:
                //               If true, the documentation will be loaded asynchronously
                function loadFullDocs(){
                        dojo.require = defaultRequire;
                        requiredModules = null;
                        try{
                                dojo.xhrGet({
                                        sync:!async,
                                        url: dojo.baseUrl + '../util/docscripts/api.json',
                                        handleAs: 'text'
                                }).addCallbacks(function(obj){
                                        _docs = (new Function("return " + obj))();
                                        obj = null;
                                        schemifyClass = actualSchemifyClass;

                                        for(var i in declaredClasses){
                                                schemifyClass(declaredClasses[i], i);
                                        }
                                        declaredClasses = null;
                                }, error);
                        }catch(e){
                                error(e);
                        }
                }
                
                if(initialized){
                        return null;
                }
                initialized = true;

                var getSplitDocs = function(moduleName, sync){
                        return dojo.xhrGet({
                                sync: sync||!async,
                                url: dojo.baseUrl + '../util/docscripts/api/' + moduleName + '.json',
                                handleAs: 'text'
                        }).addCallback(function(obj){
                                obj = (new Function("return " + obj))();
                                for(var clazz in obj){
                                        if(!_docs[clazz]){
                                                _docs[clazz] = obj[clazz];
                                        }
                                }
                        });
                };
                try{
                        var firstMod = requiredModules.shift();
                        getSplitDocs(firstMod, true).addCallbacks(function(){
                                requireDocs = function(moduleName){
                                        if(!_docs[moduleName]){
                                                try{
                                                        getSplitDocs(moduleName);
                                                }catch(e){
                                                        _docs[moduleName] = {};
                                                }
                                        }
                                };
                                //console.log(requiredModules);
                                dojo.forEach(requiredModules, function(mod){
                                        requireDocs(mod);
                                });
                                requiredModules = null;

                                schemifyClass = actualSchemifyClass;

                                for(i in declaredClasses){
                                        schemifyClass(declaredClasses[i], i);
                                }
                                declaredClasses = null;
                        },loadFullDocs);
                }catch(e){
                        loadFullDocs();
                }
                return null;
        }
})();