beginnings of v2.0

next/LAB.src.js

@@ -1,9 +1,101 @@
-// LAB.js (LABjs :: Loading And Blocking JavaScript)
-// v2.0a (c) Kyle Simpson
-// MIT License
+/*! LAB.js (LABjs :: Loading And Blocking JavaScript)
+    v2.0a (c) Kyle Simpson
+    MIT License
+*/
 
 (function(global){
-
-	global.$LAB = {};
+	var _UseCachePreload = "UseCachePreload",			// constants for the valid keys of the options object
+		_UseLocalXHR = "UseLocalXHR",
+		_UsePreloading = "UsePreloading",
+		_AlwaysPreserveOrder = "AlwaysPreserveOrder",
+		_AllowDuplicates = "AllowDuplicates",
+		_BasePath = "BasePath",
+
+		queue = [],
+		scripts = [],
+		script_registry = {},
+		global_defaults = {}
+	;
+
+	global_defaults[_UseCachePreload] = true;
+	global_defaults[_UseLocalXHR] = true;
+	global_defaults[_UsePreloading] = true;
+	global_defaults[_AlwaysPreserveOrder] = false;
+	global_defaults[_AllowDuplicates] = true;
+	global_defaults[_BasePath] = "";
+
+	function script(chain_id,chain_opts) {
+	}
+
+	function wait(chain_id,chain_opts) {
+	}
+
+	function merge_opts(source,target) {
+		for (var k in global_defaults) { if (global_defaults.hasOwnProperty(k)) {
+			if (k in source) {
+				target[k] = source[k];
+				if (k != _BasePath) target[k] = !(!target[k]);
+			}
+		}}
+		return target;
+	}
+
+	function create_chain() {
+		var chain_id = scripts.length
+			publicAPI,
+			chain_opts = merge_opts(global_defaults,{})
+		;
+
+		scripts[chain_id] = [];
+
+		publicAPI = {
+			setOptions:function(opts) {
+				merge_opts(opts,chain_opts);
+				return publicAPI;
+			},
+			script:function(){
+				var args = [].slice.call(arguments);
+				args.unshift(chain_id,chain_opts);
+				script.apply(null,args);
+				return publicAPI;
+			},
+			wait:function(){
+				var args = [].slice.call(arguments);
+				args.unshift(chain_id,chain_opts);
+				wait.apply(null,args);
+				return publicAPI;
+			}
+		};
+		return publicAPI;
+	}
+
+	global.$LAB = {
+		setGlobalDefaults:function(opts){
+			merge_opts(opts,global_defaults);
+			return global.$LAB;
+		},
+		setOptions:function(){
+			return create_chain().setOptions.apply(null,arguments);
+		},
+		script:function(){
+			return create_chain().script.apply(null,arguments);
+		},
+		queueScript:function(){
+			queue[queue.length] = {type:"script", args:[].slice.call(arguments)};
+			return global.$LAB;
+		},
+		queueWait:function(){
+			queue[queue.length] = {type:"wait", args:[].slice.call(arguments)};
+			return global.$LAB;
+		},
+		runQueue:function(){
+			var $L = global.$LAB, len=queue.length, i=len, val;
+			for (;--i>=0;) {
+				val = queue.shift();
+				$L = $L[val.type].apply(null,val.args);
+			}
+			return $L;
+		}
+	};
 
 })(window);