1 | (function (global, factory) {
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2 | typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('optics-ts'), require('jotai')) :
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3 | typeof define === 'function' && define.amd ? define(['exports', 'optics-ts', 'jotai'], factory) :
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4 | (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.jotaiOptics = {}, global.O, global.jotai));
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5 | })(this, (function (exports, O, jotai) { 'use strict';
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6 |
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7 | function _interopNamespace(e) {
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8 | if (e && e.__esModule) return e;
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9 | var n = Object.create(null);
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10 | if (e) {
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11 | Object.keys(e).forEach(function (k) {
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12 | if (k !== 'default') {
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13 | var d = Object.getOwnPropertyDescriptor(e, k);
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14 | Object.defineProperty(n, k, d.get ? d : {
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15 | enumerable: true,
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16 | get: function () { return e[k]; }
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17 | });
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18 | }
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19 | });
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20 | }
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21 | n["default"] = e;
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22 | return Object.freeze(n);
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23 | }
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24 |
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25 | var O__namespace = _interopNamespace(O);
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26 |
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27 | var getWeakCacheItem = function getWeakCacheItem(cache, deps) {
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28 | do {
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29 | var _deps = deps,
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30 | dep = _deps[0],
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31 | rest = _deps.slice(1);
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32 |
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33 | var entry = cache.get(dep);
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34 |
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35 | if (!entry) {
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36 | return;
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37 | }
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38 |
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39 | if (!rest.length) {
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40 | return entry[1];
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41 | }
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42 |
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43 | cache = entry[0];
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44 | deps = rest;
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45 | } while (deps.length);
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46 | };
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47 |
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48 | var setWeakCacheItem = function setWeakCacheItem(cache, deps, item) {
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49 | do {
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50 | var _deps2 = deps,
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51 | dep = _deps2[0],
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52 | rest = _deps2.slice(1);
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53 |
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54 | var entry = cache.get(dep);
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55 |
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56 | if (!entry) {
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57 | entry = [new WeakMap()];
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58 | cache.set(dep, entry);
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59 | }
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60 |
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61 | if (!rest.length) {
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62 | entry[1] = item;
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63 | return;
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64 | }
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65 |
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66 | cache = entry[0];
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67 | deps = rest;
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68 | } while (deps.length);
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69 | };
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70 |
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71 | var createMemoizeAtom = function createMemoizeAtom() {
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72 | var cache = new WeakMap();
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73 |
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74 | var memoizeAtom = function memoizeAtom(createAtom, deps) {
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75 | var cachedAtom = getWeakCacheItem(cache, deps);
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76 |
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77 | if (cachedAtom) {
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78 | return cachedAtom;
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79 | }
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80 |
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81 | var createdAtom = createAtom();
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82 | setWeakCacheItem(cache, deps, createdAtom);
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83 | return createdAtom;
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84 | };
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85 |
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86 | return memoizeAtom;
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87 | };
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88 |
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89 | var memoizeAtom = createMemoizeAtom();
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90 |
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91 | var isFunction = function isFunction(x) {
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92 | return typeof x === 'function';
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93 | };
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94 |
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95 | function focusAtom(baseAtom, callback) {
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96 | return memoizeAtom(function () {
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97 | var focus = callback(O__namespace.optic());
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98 | var derivedAtom = jotai.atom(function (get) {
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99 | return getValueUsingOptic(focus, get(baseAtom));
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100 | }, function (get, set, update) {
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101 | var newValueProducer = isFunction(update) ? O__namespace.modify(focus)(update) : O__namespace.set(focus)(update);
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102 | return set(baseAtom, newValueProducer(get(baseAtom)));
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103 | });
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104 | return derivedAtom;
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105 | }, [baseAtom, callback]);
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106 | }
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107 |
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108 | var getValueUsingOptic = function getValueUsingOptic(focus, bigValue) {
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109 | if (focus._tag === 'Traversal') {
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110 | var values = O__namespace.collect(focus)(bigValue);
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111 | return values;
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112 | }
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113 |
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114 | if (focus._tag === 'Prism') {
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115 | var _value = O__namespace.preview(focus)(bigValue);
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116 |
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117 | return _value;
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118 | }
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119 |
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120 | var value = O__namespace.get(focus)(bigValue);
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121 | return value;
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122 | };
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123 |
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124 | exports.focusAtom = focusAtom;
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125 |
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126 | Object.defineProperty(exports, '__esModule', { value: true });
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127 |
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128 | }));
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