New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit

git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f

1 files changed, 90 insertions, 0 deletions

diff --git a/includes/js/dojo/data/util/simpleFetch.js b/includes/js/dojo/data/util/simpleFetch.js
new file mode 100644
index 0000000..f54d763
--- /dev/null
+++ b/includes/js/dojo/data/util/simpleFetch.js
@@ -0,0 +1,90 @@
+if(!dojo._hasResource["dojo.data.util.simpleFetch"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojo.data.util.simpleFetch"] = true;
+dojo.provide("dojo.data.util.simpleFetch");
+dojo.require("dojo.data.util.sorter");
+
+dojo.data.util.simpleFetch.fetch = function(/* Object? */ request){
+	//	summary:
+	//		The simpleFetch mixin is designed to serve as a set of function(s) that can
+	//		be mixed into other datastore implementations to accelerate their development.  
+	//		The simpleFetch mixin should work well for any datastore that can respond to a _fetchItems() 
+	//		call by returning an array of all the found items that matched the query.  The simpleFetch mixin
+	//		is not designed to work for datastores that respond to a fetch() call by incrementally
+	//		loading items, or sequentially loading partial batches of the result
+	//		set.  For datastores that mixin simpleFetch, simpleFetch 
+	//		implements a fetch method that automatically handles eight of the fetch()
+	//		arguments -- onBegin, onItem, onComplete, onError, start, count, sort and scope
+	//		The class mixing in simpleFetch should not implement fetch(),
+	//		but should instead implement a _fetchItems() method.  The _fetchItems() 
+	//		method takes three arguments, the keywordArgs object that was passed 
+	//		to fetch(), a callback function to be called when the result array is
+	//		available, and an error callback to be called if something goes wrong.
+	//		The _fetchItems() method should ignore any keywordArgs parameters for
+	//		start, count, onBegin, onItem, onComplete, onError, sort, and scope.  
+	//		The _fetchItems() method needs to correctly handle any other keywordArgs
+	//		parameters, including the query parameter and any optional parameters 
+	//		(such as includeChildren).  The _fetchItems() method should create an array of 
+	//		result items and pass it to the fetchHandler along with the original request object 
+	//		-- or, the _fetchItems() method may, if it wants to, create an new request object 
+	//		with other specifics about the request that are specific to the datastore and pass 
+	//		that as the request object to the handler.
+	//
+	//		For more information on this specific function, see dojo.data.api.Read.fetch()
+	request = request || {};
+	if(!request.store){
+		request.store = this;
+	}
+	var self = this;
+
+	var _errorHandler = function(errorData, requestObject){
+		if(requestObject.onError){
+			var scope = requestObject.scope || dojo.global;
+			requestObject.onError.call(scope, errorData, requestObject);
+		}
+	};
+
+	var _fetchHandler = function(items, requestObject){
+		var oldAbortFunction = requestObject.abort || null;
+		var aborted = false;
+
+		var startIndex = requestObject.start?requestObject.start:0;
+		var endIndex   = requestObject.count?(startIndex + requestObject.count):items.length;
+
+		requestObject.abort = function(){
+			aborted = true;
+			if(oldAbortFunction){
+				oldAbortFunction.call(requestObject);
+			}
+		};
+
+		var scope = requestObject.scope || dojo.global;
+		if(!requestObject.store){
+			requestObject.store = self;
+		}
+		if(requestObject.onBegin){
+			requestObject.onBegin.call(scope, items.length, requestObject);
+		}
+		if(requestObject.sort){
+			items.sort(dojo.data.util.sorter.createSortFunction(requestObject.sort, self));
+		}
+		if(requestObject.onItem){
+			for(var i = startIndex; (i < items.length) && (i < endIndex); ++i){
+				var item = items[i];
+				if(!aborted){
+					requestObject.onItem.call(scope, item, requestObject);
+				}
+			}
+		}
+		if(requestObject.onComplete && !aborted){
+			var subset = null;
+			if (!requestObject.onItem) {
+				subset = items.slice(startIndex, endIndex);
+			}
+			requestObject.onComplete.call(scope, subset, requestObject);   
+		}
+	};
+	this._fetchItems(request, _fetchHandler, _errorHandler);
+	return request;	// Object
+};
+
+}