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define(["dojo/_base/declare", "../guard", "../safe", "../log/_LogMixin"], function (declare, guard, safe, _LogMixin) {
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"use strict";
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return declare([_LogMixin], {
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_current: null,
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_pending: false,
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getCurrent: function () {
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return this._current;
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},
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_start: function () {
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if (this._pending)
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throw new Error("The activation/decativation is already pending");
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this._pending = true;
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},
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_await: function (d) {
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var me = this;
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return d.then(function (x) {
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me._pending = false;
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return x;
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}, function (e) {
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me._pending = false;
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throw e;
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});
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},
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activate: function (component) {
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safe.argumentNotNull(component, "component");
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var me = this;
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if (component.getController() !== this)
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throw new Error("The specified component doesn't belong to this controller");
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return me._await(guard(me, "_start").then(function () {
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me._activate(component);
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}));
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},
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_activate: function (component) {
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var me = this;
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if (me._current === component)
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return guard(false);
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// before activation hook
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return guard(me, "onActivating", [component]).then(function () {
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// deactivate curent
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if (me._current)
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return me._current.deactivate(true).then(function () {
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try {
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me._current.onDeactivated();
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} catch (err) {
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me.error(err);
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}
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// HACK raise deactivated event
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try {
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me.onDeactivated(me._current, component);
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} catch (err) {
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// deactivated shouldn't affect the process
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me.error(err);
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}
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me._current = null;
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});
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}).then(function () {
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return component.activate(true);
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}).then(function () {
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me._current = component;
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try {
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me.onActivated(component);
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} catch (err) {
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me.error(err);
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}
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});
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},
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/**
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* Деактивирует текущую компоненту.
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*
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* @async
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* @returns true - компонента была деактивирована, либо нет активной
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* компоненты. false - запрос на деактивацию - отклонен.
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*/
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deactivate: function () {
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var me = this;
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return me._await(guard(me, "_start").then(function () {
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return me._deactivate();
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}));
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},
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_deactivate: function () {
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var me = this;
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if (!me._current)
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return guard(false);
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return guard(me, "onDeactivating").then(function () {
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return me._current.deactivate(true);
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}).then(function () {
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// HACK raise deactivated event
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try {
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me.onDeactivated(me._current);
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} catch (err) {
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me.error(err);
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}
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me._current = null;
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});
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},
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onActivating: function (component) {},
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onDeactivating: function (component) {},
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onDeactivated: function (component, next) {},
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onActivated: function (component) {}
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});
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});
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