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annotate core/src/js/components/ActivationController.js @ 30:2dfba21cd879

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author cin
date Wed, 27 Jun 2018 02:46:14 +0300
parents acdcdf1a8d21
children
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1 define(["dojo/_base/declare", "../guard", "../safe", "../log/_LogMixin"], function (declare, guard, safe, _LogMixin) {
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2 "use strict";
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3 return declare([_LogMixin], {
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4
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5 _current: null,
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6
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7 _pending: false,
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8
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9 getCurrent: function () {
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10 return this._current;
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11 },
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12
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13 _start: function () {
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14 if (this._pending)
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15 throw new Error("The activation/decativation is already pending");
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16 this._pending = true;
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17 },
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18
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19 _await: function (d) {
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20 var me = this;
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21 return d.then(function (x) {
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22 me._pending = false;
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23 return x;
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24 }, function (e) {
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25 me._pending = false;
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26 throw e;
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27 });
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28 },
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29
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30 activate: function (component) {
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31 safe.argumentNotNull(component, "component");
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32 var me = this;
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33 if (component.getController() !== this)
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34 throw new Error("The specified component doesn't belong to this controller");
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35
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36 return me._await(guard(me, "_start").then(function () {
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37 me._activate(component);
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38 }));
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39 },
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40
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41 _activate: function (component) {
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42 var me = this;
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43 if (me._current === component)
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44 return guard(false);
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45
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46 // before activation hook
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47 return guard(me, "onActivating", [component]).then(function () {
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48 // deactivate curent
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49 if (me._current)
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50 return me._current.deactivate(true).then(function () {
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51 try {
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52 me._current.onDeactivated();
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53 } catch (err) {
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54 me.error(err);
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55 }
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56 // HACK raise deactivated event
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57 try {
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58 me.onDeactivated(me._current, component);
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59 } catch (err) {
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60 // deactivated shouldn't affect the process
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61 me.error(err);
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62 }
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63 me._current = null;
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64
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65 });
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66 }).then(function () {
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67 return component.activate(true);
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68 }).then(function () {
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69 me._current = component;
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70 try {
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71 me.onActivated(component);
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72 } catch (err) {
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73 me.error(err);
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74 }
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75
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76 });
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77
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78 },
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79
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80 /**
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81 * Деактивирует текущую компоненту.
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82 *
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83 * @async
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84 * @returns true - компонента была деактивирована, либо нет активной
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85 * компоненты. false - запрос на деактивацию - отклонен.
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86 */
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87 deactivate: function () {
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88 var me = this;
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89 return me._await(guard(me, "_start").then(function () {
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90 return me._deactivate();
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91 }));
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92 },
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93
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94 _deactivate: function () {
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95 var me = this;
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96 if (!me._current)
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97 return guard(false);
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98
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99 return guard(me, "onDeactivating").then(function () {
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100 return me._current.deactivate(true);
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101 }).then(function () {
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102 // HACK raise deactivated event
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103 try {
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104 me.onDeactivated(me._current);
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105 } catch (err) {
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106 me.error(err);
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107 }
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108 me._current = null;
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109 });
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110 },
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111
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112 onActivating: function (component) {},
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113
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114 onDeactivating: function (component) {},
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115
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116 onDeactivated: function (component, next) {},
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117
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118 onActivated: function (component) {}
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119 });
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120 });