--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/implab/components/ActivationController.js	Thu Jun 01 13:20:03 2017 +0300
@@ -0,0 +1,126 @@
+define([ "dojo/_base/declare", "./guard", "./safe", "./_LogMixin" ],
+
+function(declare, guard, safe, _LogMixin) {
+	"use strict";
+	return declare([ _LogMixin ], {
+
+		_current : null,
+
+		_pending : false,
+
+		getCurrent : function() {
+			return this._current;
+		},
+
+		_start : function() {
+			if (this._pending)
+				throw new Error("The activation/decativation is already pending");
+			this._pending = true;
+		},
+
+		_await : function(d) {
+			var me = this;
+			return d.then(function(x) {
+				me._pending = false;
+				return x;
+			}, function(e) {
+				me._pending = false;
+				throw e;
+			});
+		},
+
+		activate : function(component) {
+			safe.argumentNotNull(component, "component");
+			var me = this;
+			if (component.getController() !== this)
+				throw new Error("The specified component doesn't belong to this controller");
+
+			return me._await(guard(me, "_start").then(function() {
+				me._activate(component);
+			}));
+		},
+
+		_activate : function(component) {
+			var me = this;
+			if (me._current === component)
+				return guard(false);
+
+			// before activation hook
+			return guard(me, "onActivating", [ component ]).then(function() {
+				// deactivate curent
+				if (me._current)
+					return me._current.deactivate(true).then(function() {
+						try {
+							me._current.onDeactivated();
+						} catch (err) {
+							me.error(err);
+						}
+						// HACK raise deactivated event
+						try {
+							me.onDeactivated(me._current, component);
+						} catch (err) {
+							// deactivated shouldn't affect the process
+							me.error(err);
+						}
+						me._current = null;
+
+					});
+			}).then(function() {
+				return component.activate(true);
+			}).then(function() {
+				me._current = component;
+				try {
+					me.onActivated(component);
+				} catch (err) {
+					me.error(err);
+				}
+
+			});
+
+		},
+
+		/**
+		 * Деактивирует текущую компоненту.
+		 * 
+		 * @async
+		 * @returns true - компонента была деактивирована, либо нет активной
+		 *          компоненты. false - запрос на деактивацию - отклонен.
+		 */
+		deactivate : function() {
+			var me = this;
+			return me._await(guard(me,"_start").then(function() {
+				return me._deactivate();
+			}));
+		},
+
+		_deactivate : function() {
+			var me = this;
+			if (!me._current)
+				return guard(false);
+
+			return guard(me, "onDeactivating").then(function() {
+				return me._current.deactivate(true);
+			}).then(function() {
+				// HACK raise deactivated event
+				try {
+					me.onDeactivated(me._current);
+				} catch (err) {
+					me.error(err);
+				}
+				me._current = null;
+			});
+		},
+
+		onActivating : function(component) {
+		},
+
+		onDeactivating : function(component) {
+		},
+
+		onDeactivated : function(component, next) {
+		},
+
+		onActivated : function(component) {
+		}
+	});
+});
\ No newline at end of file