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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| import levenshtein from 'fast-levenshtein' | ||
| import { getIdByType } from './proxies' | ||
| import { getComponentDisplayName, isReactClass } from '../internal/reactUtils' | ||
| import { UNWRAP_PROXY } from '../proxy' | ||
|
|
||
| // some `empty` names, React can autoset display name to... | ||
| const UNDEFINED_NAMES = { | ||
| Unknown: true, | ||
| Component: true, | ||
| } | ||
|
|
||
| const areNamesEqual = (a, b) => | ||
| a === b || (UNDEFINED_NAMES[a] && UNDEFINED_NAMES[b]) | ||
|
|
||
| const isFunctional = fn => typeof fn === 'function' | ||
| const getTypeOf = type => { | ||
| if (isReactClass(type)) return 'ReactComponent' | ||
| if (isFunctional(type)) return 'StatelessFunctional' | ||
| return 'Fragment' // ? | ||
| } | ||
|
|
||
| const haveTextSimilarity = (a, b) => | ||
| // equal or slight changed | ||
| a === b || levenshtein.get(a, b) < a.length * 0.2 | ||
|
|
||
| const equalClasses = (a, b) => { | ||
| const prototypeA = a.prototype | ||
| const prototypeB = Object.getPrototypeOf(b.prototype) | ||
|
|
||
| let hits = 0 | ||
| let misses = 0 | ||
| let comparisons = 0 | ||
| Object.getOwnPropertyNames(prototypeA).forEach(key => { | ||
| const descriptorA = Object.getOwnPropertyDescriptor(prototypeA, key) | ||
| const valueA = | ||
| descriptorA && (descriptorA.value || descriptorA.get || descriptorA.set) | ||
| const descriptorB = Object.getOwnPropertyDescriptor(prototypeB, key) | ||
| const valueB = | ||
| descriptorB && (descriptorB.value || descriptorB.get || descriptorB.set) | ||
|
|
||
| if (typeof valueA === 'function' && key !== 'constructor') { | ||
| comparisons++ | ||
| if (haveTextSimilarity(String(valueA), String(valueB))) { | ||
| hits++ | ||
| } else { | ||
| misses++ | ||
| if (key === 'render') { | ||
| misses++ | ||
| } | ||
| } | ||
| } | ||
| }) | ||
| // allow to add or remove one function | ||
| return (hits > 0 && misses <= 1) || comparisons === 0 | ||
| } | ||
|
|
||
| export const areSwappable = (a, b) => { | ||
| // both are registered components and have the same name | ||
| if (getIdByType(b) && getIdByType(a) === getIdByType(b)) { | ||
| return true | ||
| } | ||
| if (getTypeOf(a) !== getTypeOf(b)) { | ||
| return false | ||
| } | ||
| if (isReactClass(a)) { | ||
| return ( | ||
| areNamesEqual(getComponentDisplayName(a), getComponentDisplayName(b)) && | ||
| equalClasses(a, b) | ||
| ) | ||
| } | ||
|
|
||
| if (isFunctional(a)) { | ||
| const nameA = getComponentDisplayName(a) | ||
| return ( | ||
| (areNamesEqual(nameA, getComponentDisplayName(b)) && | ||
| nameA !== 'Component') || | ||
| haveTextSimilarity(String(a), String(b)) | ||
| ) | ||
| } | ||
| return false | ||
| } |
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