| 1 | import {use, useContext, useDeferredValue} from 'react'; |
| 2 | |
| 3 | import type {ReactCallSite} from 'shared/ReactTypes'; |
| 4 | |
| 5 | import type {SourceMappedLocation} from 'react-devtools-shared/src/symbolicateSource'; |
| 6 | |
| 7 | import type {SerializedAsyncInfo} from 'react-devtools-shared/src/frontend/types'; |
| 8 | |
| 9 | import FetchFileWithCachingContext from './Components/FetchFileWithCachingContext'; |
| 10 | |
| 11 | import {symbolicateSourceWithCache} from 'react-devtools-shared/src/symbolicateSource'; |
| 12 | |
| 13 | export default function useInferredName( |
| 14 | asyncInfo: SerializedAsyncInfo, |
| 15 | ): string { |
| 16 | const fetchFileWithCaching = useContext(FetchFileWithCachingContext); |
| 17 | const name = asyncInfo.awaited.name; |
| 18 | let inferNameFromStack = null; |
| 19 | if (!name || name === 'Promise' || name === 'lazy') { |
| 20 | // If all we have is a generic name, we can try to infer a better name from |
| 21 | // the stack. We only do this if the stack has more than one frame since |
| 22 | // otherwise it's likely to just be the name of the component which isn't better. |
| 23 | const bestStack = asyncInfo.awaited.stack || asyncInfo.stack; |
| 24 | if (bestStack !== null && bestStack.length > 1) { |
| 25 | inferNameFromStack = bestStack; |
| 26 | } |
| 27 | } |
| 28 | // Start by not source mapping and just taking the first name and upgrade to |
| 29 | // the better name asynchronously if we find one. Most of the time it'll just be |
| 30 | // the top of the stack. |
| 31 | const shouldSourceMap = useDeferredValue(inferNameFromStack !== null, false); |
| 32 | if (inferNameFromStack !== null) { |
| 33 | if (shouldSourceMap) { |
| 34 | let bestMatch = ''; |
| 35 | for (let i = 0; i < inferNameFromStack.length; i++) { |
| 36 | const callSite: ReactCallSite = inferNameFromStack[i]; |
| 37 | const [virtualFunctionName, virtualURL, virtualLine, virtualColumn] = |
| 38 | callSite; |
| 39 | const symbolicatedCallSite: null | SourceMappedLocation = |
| 40 | fetchFileWithCaching !== null |
| 41 | ? use( |
| 42 | symbolicateSourceWithCache( |
| 43 | fetchFileWithCaching, |
| 44 | virtualURL, |
| 45 | virtualLine, |
| 46 | virtualColumn, |
| 47 | ), |
| 48 | ) |
| 49 | : null; |
| 50 | if (symbolicatedCallSite === null) { |
| 51 | // If we can't source map, we treat it as first party code. We called whatever was |
| 52 | // the previous callsite. |
| 53 | if (bestMatch === '') { |
| 54 | return virtualFunctionName || name; |
| 55 | } else { |
| 56 | return bestMatch; |
| 57 | } |
| 58 | } else if (!symbolicatedCallSite.ignored) { |
| 59 | if (bestMatch === '') { |
| 60 | // If we had no good stack frames for internal calls, just use the last |
| 61 | // first party function name. |
| 62 | return symbolicatedCallSite[0] || virtualFunctionName || name; |
| 63 | } else { |
| 64 | return bestMatch; |
| 65 | } |
| 66 | } else { |
| 67 | // This line was ignore listed, it might be the one we called into from first party. |
| 68 | bestMatch = symbolicatedCallSite[0] || virtualFunctionName; |
| 69 | } |
| 70 | } |
| 71 | return name; |
| 72 | } else { |
| 73 | return inferNameFromStack[0][0]; |
| 74 | } |
| 75 | } else { |
| 76 | return name; |
| 77 | } |
| 78 | } |