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authormensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
committermensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
commite44a7e37b6c7b5961adaffc62b9042b8d442938e (patch)
tree95b67c356e93163467db2451f2b8cce84ed5d582 /includes/js/dojo/AdapterRegistry.js
parenta62b9742ee5e28bcec6872d88f50f25b820914f6 (diff)
downloadsemanticscuttle-e44a7e37b6c7b5961adaffc62b9042b8d442938e.tar.gz
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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
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+if(!dojo._hasResource["dojo.AdapterRegistry"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojo.AdapterRegistry"] = true;
+dojo.provide("dojo.AdapterRegistry");
+
+dojo.AdapterRegistry = function(/*Boolean?*/ returnWrappers){
+ // summary:
+ // A registry to make contextual calling/searching easier.
+ // description:
+ // Objects of this class keep list of arrays in the form [name, check,
+ // wrap, directReturn] that are used to determine what the contextual
+ // result of a set of checked arguments is. All check/wrap functions
+ // in this registry should be of the same arity.
+ // example:
+ // | // create a new registry
+ // | var reg = new dojo.AdapterRegistry();
+ // | reg.register("handleString",
+ // | dojo.isString,
+ // | function(str){
+ // | // do something with the string here
+ // | }
+ // | );
+ // | reg.register("handleArr",
+ // | dojo.isArray,
+ // | function(arr){
+ // | // do something with the array here
+ // | }
+ // | );
+ // |
+ // | // now we can pass reg.match() *either* an array or a string and
+ // | // the value we pass will get handled by the right function
+ // | reg.match("someValue"); // will call the first function
+ // | reg.match(["someValue"]); // will call the second
+
+ this.pairs = [];
+ this.returnWrappers = returnWrappers || false; // Boolean
+}
+
+dojo.extend(dojo.AdapterRegistry, {
+ register: function(/*String*/ name, /*Function*/ check, /*Function*/ wrap, /*Boolean?*/ directReturn, /*Boolean?*/ override){
+ // summary:
+ // register a check function to determine if the wrap function or
+ // object gets selected
+ // name:
+ // a way to identify this matcher.
+ // check:
+ // a function that arguments are passed to from the adapter's
+ // match() function. The check function should return true if the
+ // given arguments are appropriate for the wrap function.
+ // directReturn:
+ // If directReturn is true, the value passed in for wrap will be
+ // returned instead of being called. Alternately, the
+ // AdapterRegistry can be set globally to "return not call" using
+ // the returnWrappers property. Either way, this behavior allows
+ // the registry to act as a "search" function instead of a
+ // function interception library.
+ // override:
+ // If override is given and true, the check function will be given
+ // highest priority. Otherwise, it will be the lowest priority
+ // adapter.
+ this.pairs[((override) ? "unshift" : "push")]([name, check, wrap, directReturn]);
+ },
+
+ match: function(/* ... */){
+ // summary:
+ // Find an adapter for the given arguments. If no suitable adapter
+ // is found, throws an exception. match() accepts any number of
+ // arguments, all of which are passed to all matching functions
+ // from the registered pairs.
+ for(var i = 0; i < this.pairs.length; i++){
+ var pair = this.pairs[i];
+ if(pair[1].apply(this, arguments)){
+ if((pair[3])||(this.returnWrappers)){
+ return pair[2];
+ }else{
+ return pair[2].apply(this, arguments);
+ }
+ }
+ }
+ throw new Error("No match found");
+ },
+
+ unregister: function(name){
+ // summary: Remove a named adapter from the registry
+
+ // FIXME: this is kind of a dumb way to handle this. On a large
+ // registry this will be slow-ish and we can use the name as a lookup
+ // should we choose to trade memory for speed.
+ for(var i = 0; i < this.pairs.length; i++){
+ var pair = this.pairs[i];
+ if(pair[0] == name){
+ this.pairs.splice(i, 1);
+ return true;
+ }
+ }
+ return false;
+ }
+});
+
+}