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annotate src/implab/components/ActivationController.js @ 0:fc2517695ee1

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Initial commit, draft import of existing work
author cin
date Thu, 01 Jun 2017 13:20:03 +0300
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children 7d7059d2a810
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1 define([ "dojo/_base/declare", "./guard", "./safe", "./_LogMixin" ],
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2
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3 function(declare, guard, safe, _LogMixin) {
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4 "use strict";
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5 return declare([ _LogMixin ], {
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6
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7 _current : null,
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8
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9 _pending : false,
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10
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11 getCurrent : function() {
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12 return this._current;
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13 },
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14
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15 _start : function() {
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16 if (this._pending)
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17 throw new Error("The activation/decativation is already pending");
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18 this._pending = true;
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19 },
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20
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21 _await : function(d) {
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22 var me = this;
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23 return d.then(function(x) {
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24 me._pending = false;
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25 return x;
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26 }, function(e) {
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27 me._pending = false;
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28 throw e;
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29 });
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30 },
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31
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32 activate : function(component) {
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33 safe.argumentNotNull(component, "component");
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34 var me = this;
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35 if (component.getController() !== this)
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36 throw new Error("The specified component doesn't belong to this controller");
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37
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38 return me._await(guard(me, "_start").then(function() {
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39 me._activate(component);
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40 }));
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41 },
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42
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43 _activate : function(component) {
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44 var me = this;
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45 if (me._current === component)
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46 return guard(false);
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47
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48 // before activation hook
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49 return guard(me, "onActivating", [ component ]).then(function() {
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50 // deactivate curent
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51 if (me._current)
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52 return me._current.deactivate(true).then(function() {
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53 try {
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54 me._current.onDeactivated();
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55 } catch (err) {
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56 me.error(err);
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57 }
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58 // HACK raise deactivated event
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59 try {
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60 me.onDeactivated(me._current, component);
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61 } catch (err) {
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62 // deactivated shouldn't affect the process
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63 me.error(err);
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64 }
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65 me._current = null;
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66
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67 });
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68 }).then(function() {
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69 return component.activate(true);
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70 }).then(function() {
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71 me._current = component;
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72 try {
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73 me.onActivated(component);
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74 } catch (err) {
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75 me.error(err);
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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
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82 /**
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83 * Деактивирует текущую компоненту.
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84 *
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85 * @async
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86 * @returns true - компонента была деактивирована, либо нет активной
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87 * компоненты. false - запрос на деактивацию - отклонен.
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88 */
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89 deactivate : function() {
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90 var me = this;
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91 return me._await(guard(me,"_start").then(function() {
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92 return me._deactivate();
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93 }));
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94 },
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95
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96 _deactivate : function() {
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97 var me = this;
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98 if (!me._current)
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99 return guard(false);
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100
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101 return guard(me, "onDeactivating").then(function() {
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102 return me._current.deactivate(true);
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103 }).then(function() {
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104 // HACK raise deactivated event
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105 try {
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106 me.onDeactivated(me._current);
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107 } catch (err) {
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108 me.error(err);
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109 }
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110 me._current = null;
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111 });
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112 },
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113
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114 onActivating : function(component) {
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115 },
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116
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117 onDeactivating : function(component) {
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118 },
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119
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120 onDeactivated : function(component, next) {
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121 },
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122
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123 onActivated : function(component) {
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124 }
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125 });
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126 });