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453 lines
15 KiB
JavaScript
453 lines
15 KiB
JavaScript
/*
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Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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Available via Academic Free License >= 2.1 OR the modified BSD license.
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see: http://dojotoolkit.org/license for details
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*/
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if(!dojo._hasResource["dojo.parser"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
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dojo._hasResource["dojo.parser"] = true;
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dojo.provide("dojo.parser");
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dojo.require("dojo.date.stamp");
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new Date("X"); // workaround for #11279, new Date("") == NaN
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dojo.parser = new function(){
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// summary: The Dom/Widget parsing package
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var d = dojo;
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this._attrName = d._scopeName + "Type";
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this._query = "[" + this._attrName + "]";
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function val2type(/*Object*/ value){
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// summary:
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// Returns name of type of given value.
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if(d.isString(value)){ return "string"; }
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if(typeof value == "number"){ return "number"; }
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if(typeof value == "boolean"){ return "boolean"; }
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if(d.isFunction(value)){ return "function"; }
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if(d.isArray(value)){ return "array"; } // typeof [] == "object"
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if(value instanceof Date) { return "date"; } // assume timestamp
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if(value instanceof d._Url){ return "url"; }
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return "object";
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}
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function str2obj(/*String*/ value, /*String*/ type){
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// summary:
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// Convert given string value to given type
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switch(type){
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case "string":
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return value;
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case "number":
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return value.length ? Number(value) : NaN;
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case "boolean":
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// for checked/disabled value might be "" or "checked". interpret as true.
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return typeof value == "boolean" ? value : !(value.toLowerCase()=="false");
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case "function":
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if(d.isFunction(value)){
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// IE gives us a function, even when we say something like onClick="foo"
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// (in which case it gives us an invalid function "function(){ foo }").
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// Therefore, convert to string
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value=value.toString();
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value=d.trim(value.substring(value.indexOf('{')+1, value.length-1));
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}
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try{
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if(value === "" || value.search(/[^\w\.]+/i) != -1){
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// The user has specified some text for a function like "return x+5"
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return new Function(value);
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}else{
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// The user has specified the name of a function like "myOnClick"
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// or a single word function "return"
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return d.getObject(value, false) || new Function(value);
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}
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}catch(e){ return new Function(); }
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case "array":
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return value ? value.split(/\s*,\s*/) : [];
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case "date":
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switch(value){
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case "": return new Date(""); // the NaN of dates
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case "now": return new Date(); // current date
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default: return d.date.stamp.fromISOString(value);
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}
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case "url":
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return d.baseUrl + value;
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default:
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return d.fromJson(value);
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}
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}
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var instanceClasses = {
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// map from fully qualified name (like "dijit.Button") to structure like
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// { cls: dijit.Button, params: {label: "string", disabled: "boolean"} }
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};
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// Widgets like BorderContainer add properties to _Widget via dojo.extend().
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// If BorderContainer is loaded after _Widget's parameter list has been cached,
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// we need to refresh that parameter list (for _Widget and all widgets that extend _Widget).
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dojo.connect(dojo, "extend", function(){
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instanceClasses = {};
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});
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function getClassInfo(/*String*/ className){
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// className:
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// fully qualified name (like "dijit.form.Button")
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// returns:
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// structure like
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// {
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// cls: dijit.Button,
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// params: { label: "string", disabled: "boolean"}
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// }
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if(!instanceClasses[className]){
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// get pointer to widget class
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var cls = d.getObject(className);
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if(!cls){ return null; } // class not defined [yet]
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var proto = cls.prototype;
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// get table of parameter names & types
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var params = {}, dummyClass = {};
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for(var name in proto){
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if(name.charAt(0)=="_"){ continue; } // skip internal properties
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if(name in dummyClass){ continue; } // skip "constructor" and "toString"
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var defVal = proto[name];
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params[name]=val2type(defVal);
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}
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instanceClasses[className] = { cls: cls, params: params };
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}
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return instanceClasses[className];
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}
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this._functionFromScript = function(script){
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var preamble = "";
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var suffix = "";
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var argsStr = script.getAttribute("args");
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if(argsStr){
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d.forEach(argsStr.split(/\s*,\s*/), function(part, idx){
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preamble += "var "+part+" = arguments["+idx+"]; ";
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});
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}
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var withStr = script.getAttribute("with");
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if(withStr && withStr.length){
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d.forEach(withStr.split(/\s*,\s*/), function(part){
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preamble += "with("+part+"){";
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suffix += "}";
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});
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}
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return new Function(preamble+script.innerHTML+suffix);
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}
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this.instantiate = function(/* Array */nodes, /* Object? */mixin, /* Object? */args){
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// summary:
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// Takes array of nodes, and turns them into class instances and
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// potentially calls a startup method to allow them to connect with
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// any children.
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// nodes: Array
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// Array of nodes or objects like
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// | {
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// | type: "dijit.form.Button",
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// | node: DOMNode,
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// | scripts: [ ... ], // array of <script type="dojo/..."> children of node
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// | inherited: { ... } // settings inherited from ancestors like dir, theme, etc.
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// | }
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// mixin: Object?
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// An object that will be mixed in with each node in the array.
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// Values in the mixin will override values in the node, if they
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// exist.
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// args: Object?
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// An object used to hold kwArgs for instantiation.
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// Supports 'noStart' and inherited.
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var thelist = [], dp = dojo.parser;
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mixin = mixin||{};
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args = args||{};
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d.forEach(nodes, function(obj){
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if(!obj){ return; }
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// Get pointers to DOMNode, dojoType string, and clsInfo (metadata about the dojoType), etc.s
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var node, type, clsInfo, clazz, scripts;
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if(obj.node){
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// new format of nodes[] array, object w/lots of properties pre-computed for me
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node = obj.node;
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type = obj.type;
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clsInfo = obj.clsInfo || (type && getClassInfo(type));
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clazz = clsInfo && clsInfo.cls;
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scripts = obj.scripts;
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}else{
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// old (backwards compatible) format of nodes[] array, simple array of DOMNodes
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node = obj;
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type = dp._attrName in mixin ? mixin[dp._attrName] : node.getAttribute(dp._attrName);
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clsInfo = type && getClassInfo(type);
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clazz = clsInfo && clsInfo.cls;
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scripts = (clazz && (clazz._noScript || clazz.prototype._noScript) ? [] :
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d.query("> script[type^='dojo/']", node));
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}
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if(!clsInfo){
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throw new Error("Could not load class '" + type);
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}
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// Setup hash to hold parameter settings for this widget. Start with the parameter
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// settings inherited from ancestors ("dir" and "lang").
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// Inherited setting may later be overridden by explicit settings on node itself.
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var params = {},
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attributes = node.attributes;
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if(args.defaults){
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// settings for the document itself (or whatever subtree is being parsed)
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dojo.mixin(params, args.defaults);
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}
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if(obj.inherited){
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// settings from dir=rtl or lang=... on a node above this node
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dojo.mixin(params, obj.inherited);
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}
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// read parameters (ie, attributes) specified on DOMNode
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// clsInfo.params lists expected params like {"checked": "boolean", "n": "number"}
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for(var name in clsInfo.params){
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var item = name in mixin?{value:mixin[name],specified:true}:attributes.getNamedItem(name);
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if(!item || (!item.specified && (!dojo.isIE || name.toLowerCase()!="value"))){ continue; }
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var value = item.value;
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// Deal with IE quirks for 'class' and 'style'
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switch(name){
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case "class":
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value = "className" in mixin?mixin.className:node.className;
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break;
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case "style":
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value = "style" in mixin?mixin.style:(node.style && node.style.cssText); // FIXME: Opera?
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}
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var _type = clsInfo.params[name];
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if(typeof value == "string"){
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params[name] = str2obj(value, _type);
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}else{
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params[name] = value;
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}
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}
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// Process <script type="dojo/*"> script tags
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// <script type="dojo/method" event="foo"> tags are added to params, and passed to
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// the widget on instantiation.
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// <script type="dojo/method"> tags (with no event) are executed after instantiation
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// <script type="dojo/connect" event="foo"> tags are dojo.connected after instantiation
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// note: dojo/* script tags cannot exist in self closing widgets, like <input />
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var connects = [], // functions to connect after instantiation
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calls = []; // functions to call after instantiation
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d.forEach(scripts, function(script){
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node.removeChild(script);
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var event = script.getAttribute("event"),
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type = script.getAttribute("type"),
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nf = d.parser._functionFromScript(script);
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if(event){
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if(type == "dojo/connect"){
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connects.push({event: event, func: nf});
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}else{
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params[event] = nf;
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}
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}else{
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calls.push(nf);
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}
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});
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var markupFactory = clazz.markupFactory || clazz.prototype && clazz.prototype.markupFactory;
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// create the instance
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var instance = markupFactory ? markupFactory(params, node, clazz) : new clazz(params, node);
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thelist.push(instance);
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// map it to the JS namespace if that makes sense
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var jsname = node.getAttribute("jsId");
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if(jsname){
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d.setObject(jsname, instance);
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}
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// process connections and startup functions
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d.forEach(connects, function(connect){
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d.connect(instance, connect.event, null, connect.func);
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});
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d.forEach(calls, function(func){
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func.call(instance);
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});
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});
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// Call startup on each top level instance if it makes sense (as for
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// widgets). Parent widgets will recursively call startup on their
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// (non-top level) children
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if(!mixin._started){
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// TODO: for 2.0, when old instantiate() API is desupported, store parent-child
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// relationships in the nodes[] array so that no getParent() call is needed.
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// Note that will require a parse() call from ContentPane setting a param that the
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// ContentPane is the parent widget (so that the parse doesn't call startup() on the
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// ContentPane's children)
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d.forEach(thelist, function(instance){
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if( !args.noStart && instance &&
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instance.startup &&
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!instance._started &&
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(!instance.getParent || !instance.getParent())
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){
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instance.startup();
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}
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});
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}
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return thelist;
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};
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this.parse = function(/*DomNode?*/ rootNode, /* Object? */ args){
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// summary:
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// Scan the DOM for class instances, and instantiate them.
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//
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// description:
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// Search specified node (or root node) recursively for class instances,
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// and instantiate them Searches for
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// dojoType="qualified.class.name"
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//
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// rootNode: DomNode?
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// A default starting root node from which to start the parsing. Can be
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// omitted, defaulting to the entire document. If omitted, the `args`
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// object can be passed in this place. If the `args` object has a
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// `rootNode` member, that is used.
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//
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// args:
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// a kwArgs object passed along to instantiate()
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//
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// * noStart: Boolean?
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// when set will prevent the parser from calling .startup()
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// when locating the nodes.
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// * rootNode: DomNode?
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// identical to the function's `rootNode` argument, though
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// allowed to be passed in via this `args object.
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// * inherited: Object
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// Hash possibly containing dir and lang settings to be applied to
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// parsed widgets, unless there's another setting on a sub-node that overrides
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//
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//
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// example:
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// Parse all widgets on a page:
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// | dojo.parser.parse();
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//
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// example:
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// Parse all classes within the node with id="foo"
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// | dojo.parser.parse(dojo.byId(foo));
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//
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// example:
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// Parse all classes in a page, but do not call .startup() on any
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// child
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// | dojo.parser.parse({ noStart: true })
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//
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// example:
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// Parse all classes in a node, but do not call .startup()
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// | dojo.parser.parse(someNode, { noStart:true });
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// | // or
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// | dojo.parser.parse({ noStart:true, rootNode: someNode });
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// determine the root node based on the passed arguments.
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var root;
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if(!args && rootNode && rootNode.rootNode){
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args = rootNode;
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root = args.rootNode;
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}else{
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root = rootNode;
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}
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var attrName = this._attrName;
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function scan(parent, list){
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// summary:
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// Parent is an Object representing a DOMNode, with or without a dojoType specified.
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// Scan parent's children looking for nodes with dojoType specified, storing in list[].
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// If parent has a dojoType, also collects <script type=dojo/*> children and stores in parent.scripts[].
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// parent: Object
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// Object representing the parent node, like
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// | {
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// | node: DomNode, // scan children of this node
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// | inherited: {dir: "rtl"}, // dir/lang setting inherited from above node
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// |
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// | // attributes only set if node has dojoType specified
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// | scripts: [], // empty array, put <script type=dojo/*> in here
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// | clsInfo: { cls: dijit.form.Button, ...}
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// | }
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// list: DomNode[]
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// Output array of objects (same format as parent) representing nodes to be turned into widgets
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// Effective dir and lang settings on parent node, either set directly or inherited from grandparent
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var inherited = dojo.clone(parent.inherited);
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dojo.forEach(["dir", "lang"], function(name){
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var val = parent.node.getAttribute(name);
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if(val){
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inherited[name] = val;
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}
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});
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// if parent is a widget, then search for <script type=dojo/*> tags and put them in scripts[].
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var scripts = parent.scripts;
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// unless parent is a widget with the stopParser flag set, continue search for dojoType, recursively
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var recurse = !parent.clsInfo || !parent.clsInfo.cls.prototype.stopParser;
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// scan parent's children looking for dojoType and <script type=dojo/*>
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for(var child = parent.node.firstChild; child; child = child.nextSibling){
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if(child.nodeType == 1){
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var type = recurse && child.getAttribute(attrName);
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if(type){
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// if dojoType specified, add to output array of nodes to instantiate
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var params = {
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"type": type,
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clsInfo: getClassInfo(type), // note: won't find classes declared via dojo.Declaration
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node: child,
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scripts: [], // <script> nodes that are parent's children
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inherited: inherited // dir & lang attributes inherited from parent
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};
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list.push(params);
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// Recurse, collecting <script type="dojo/..."> children, and also looking for
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// descendant nodes with dojoType specified (unless the widget has the stopParser flag),
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scan(params, list);
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}else if(scripts && child.nodeName.toLowerCase() == "script"){
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// if <script type="dojo/...">, save in scripts[]
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type = child.getAttribute("type");
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if (type && /^dojo\//i.test(type)) {
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scripts.push(child);
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}
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}else if(recurse){
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// Recurse, looking for grandchild nodes with dojoType specified
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scan({
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node: child,
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inherited: inherited
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}, list);
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}
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}
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}
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}
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// Make list of all nodes on page w/dojoType specified
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var list = [];
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scan({
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node: root ? dojo.byId(root) : dojo.body(),
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inherited: (args && args.inherited) || {
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dir: dojo._isBodyLtr() ? "ltr" : "rtl"
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}
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}, list);
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// go build the object instances
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return this.instantiate(list, null, args); // Array
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};
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}();
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//Register the parser callback. It should be the first callback
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//after the a11y test.
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(function(){
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var parseRunner = function(){
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if(dojo.config.parseOnLoad){
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dojo.parser.parse();
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}
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};
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// FIXME: need to clobber cross-dependency!!
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if(dojo.exists("dijit.wai.onload") && (dijit.wai.onload === dojo._loaders[0])){
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dojo._loaders.splice(1, 0, parseRunner);
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}else{
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dojo._loaders.unshift(parseRunner);
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}
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})();
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}
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