全局事件机制

public/js/app/api.js

@@ -176,4 +176,53 @@ var Api = {
 	}
 };
 
+//-------------
+// 全局事件机制
+
+$.extend(Api, {
+	_eventCallbacks: {},
+	_listen: function(type, callback) {
+        var callbacks = this._eventCallbacks[type] || (this._eventCallbacks[type] = []);
+        callbacks.push(callback);
+    },
+    // on('a b', function(params) {})
+    on: function(name, callback) {
+        var names = name.split(/\s+/);
+        for (var i = 0; i < names.length; ++i) {
+        	this._listen(names[i], callback);
+        }
+        return this;
+    },
+    // off('a b', function(params) {})
+    off: function(name, callback) {
+        var types = name.split(/\s+/);
+        var i, j, callbacks, removeIndex;
+        for (i = 0; i < types.length; i++) {
+            callbacks = this._eventCallbacks[types[i].toLowerCase()];
+            if (callbacks) {
+                removeIndex = null;
+                for (j = 0; j < callbacks.length; j++) {
+                    if (callbacks[j] == callback) {
+                        removeIndex = j;
+                    }
+                }
+                if (removeIndex !== null) {
+                    callbacks.splice(removeIndex, 1);
+                }
+            }
+        }
+    },
+    // LEA.trigger('a', {});
+    trigger: function(type, params) {
+        var callbacks = this._eventCallbacks[type] || [];
+        if (callbacks.length === 0) {
+            return;
+        }
+        for (var i = 0; i < callbacks.length; i++) {
+            callbacks[i].call(this, params);
+        }
+    }
+});
+
+
 Api._init();