1 |
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2 | var PubSub = function () {
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3 | var _listen;
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4 | var _trigger;
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5 | var _remove;
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6 | var _default = 'default';
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7 | var namespaceCache = {};
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8 | var _create;
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9 | var each = function each(arr, fn) {
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10 | var ret;
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11 | for (var i = 0; i < arr.length; i++) {
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12 | var n = arr[i];
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13 | ret = fn.call(n, i, n);
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14 | }
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15 | return ret;
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16 | };
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17 |
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18 | _listen = function _listen(key, fn, cache) {
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19 | if (!cache[key]) {
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20 | cache[key] = [];
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21 | }
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22 | cache[key].push(fn);
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23 | };
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24 | _remove = function _remove(key, cache, fn) {
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25 | if (!cache[key]) {
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26 | return;
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27 | }
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28 | if (fn) {
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29 | for (var i = cache[key].length; i >= 0; i--) {
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30 | if (cache[key] === fn) {
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31 | cache[key].splice(i, 1);
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32 | } else {
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33 | cache[key] = [];
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34 | }
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35 | }
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36 | } else {
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37 | cache[key] = [];
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38 | }
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39 | };
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40 | _trigger = function _trigger() {
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41 | var cache = [].shift.call(arguments);
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42 | var key = [].shift.call(arguments);
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43 | var args = arguments;
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44 | var stack = cache[key];
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45 | if (!stack || !stack.length) {
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46 | return;
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47 | }
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48 | return each(stack, function () {
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49 | return this.apply(this, args);
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50 | });
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51 | };
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52 | _create = function _create(ns) {
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53 | var namespace = ns || _default;
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54 | var cache = {};
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55 | var offlineStack = [];
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56 | var ret = {
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57 | listen: function listen(key, fn, last) {
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58 | _listen(key, fn, cache);
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59 | if (offlineStack === null) {
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60 | return;
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61 | }
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62 | if (last === 'last') {
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63 | offlineStack.length && offlineStack.pop()();
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64 | } else {
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65 | each(offlineStack, function () {
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66 | this();
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67 | });
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68 | }
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69 | offlineStack = null;
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70 | },
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71 | one: function one(key, fn, last) {
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72 | _remove(key, cache);
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73 | this.listen(key, fn, last);
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74 | },
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75 | remove: function remove(key, fn) {
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76 | _remove(key, cache, fn);
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77 | },
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78 | trigger: function trigger() {
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79 | var _self = this;
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80 | [].unshift.call(arguments, cache);
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81 | var args = arguments;
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82 | var fn = function fn() {
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83 | return _trigger.apply(_self, args);
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84 | };
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85 | if (offlineStack) {
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86 | return offlineStack.push(fn);
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87 | }
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88 | return fn();
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89 | }
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90 | };
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91 | if (Object.prototype.toString.call(namespace).indexOf('object HTML') === 1 && namespace.getAttribute('id')) {
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92 | namespace = namespace.getAttribute('id');
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93 | }
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94 | var result = namespace ? namespaceCache[namespace] ? namespaceCache[namespace] : namespaceCache[namespace] = ret : ret;
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95 | return result;
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96 | };
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97 | return {
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98 | create: _create,
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99 | one: function one(key, fn, last) {
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100 | var event = this.create();
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101 | event.one(key, fn, last);
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102 | },
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103 | remove: function remove(key, fn) {
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104 | var event = this.create();
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105 | event.remove(key, fn);
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106 | },
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107 | listen: function listen(key, fn, last) {
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108 | var event = this.create();
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109 | event.listen(key, fn, last);
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110 | },
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111 | trigger: function trigger() {
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112 | var event = this.create();
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113 | event.trigger.apply(this, arguments);
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114 | }
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115 | };
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116 | }();
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117 |
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118 | export default PubSub;
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