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(feat) find component references (sveltejs#1509)
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99 changes: 99 additions & 0 deletions
99
packages/language-server/src/plugins/typescript/features/FindComponentReferencesProvider.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| import { Location, Position, Range } from 'vscode-languageserver'; | ||
| import { flatten, isNotNullOrUndefined, pathToUrl, urlToPath } from '../../../utils'; | ||
| import { FindComponentReferencesProvider } from '../../interfaces'; | ||
| import { | ||
| DocumentSnapshot, | ||
| SvelteDocumentSnapshot, | ||
| SvelteSnapshotFragment | ||
| } from '../DocumentSnapshot'; | ||
| import { LSAndTSDocResolver } from '../LSAndTSDocResolver'; | ||
| import { convertToLocationRange, hasNonZeroRange } from '../utils'; | ||
| import { isNoTextSpanInGeneratedCode, SnapshotFragmentMap } from './utils'; | ||
|
|
||
| const COMPONENT_SUFFIX = '__SvelteComponent_'; | ||
|
|
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| export class FindComponentReferencesProviderImpl implements FindComponentReferencesProvider { | ||
| constructor(private readonly lsAndTsDocResolver: LSAndTSDocResolver) {} | ||
|
|
||
| async findComponentReferences(uri: string): Promise<Location[] | null> { | ||
| // No document available, just the uri, because it could be called on an unopened file | ||
| const fileName = urlToPath(uri); | ||
| if (!fileName) { | ||
| return null; | ||
| } | ||
|
|
||
| const lang = await this.lsAndTsDocResolver.getLSForPath(fileName); | ||
| const tsDoc = await this.lsAndTsDocResolver.getSnapshot(fileName); | ||
| const fragment = tsDoc.getFragment(); | ||
| if (!(fragment instanceof SvelteSnapshotFragment)) { | ||
| return null; | ||
| } | ||
|
|
||
| const references = lang.findReferences( | ||
| tsDoc.filePath, | ||
| this.offsetOfComponentExport(fragment) | ||
| ); | ||
| if (!references) { | ||
| return null; | ||
| } | ||
|
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| const docs = new SnapshotFragmentMap(this.lsAndTsDocResolver); | ||
| docs.set(tsDoc.filePath, { fragment, snapshot: tsDoc }); | ||
|
|
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| const locations = await Promise.all( | ||
| flatten(references.map((ref) => ref.references)).map(async (ref) => { | ||
| if (ref.isDefinition) { | ||
| return null; | ||
| } | ||
|
|
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| const { fragment, snapshot } = await docs.retrieve(ref.fileName); | ||
|
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||
| if (!isNoTextSpanInGeneratedCode(snapshot.getFullText(), ref.textSpan)) { | ||
| return null; | ||
| } | ||
|
|
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| const refLocation = Location.create( | ||
| pathToUrl(ref.fileName), | ||
| convertToLocationRange(fragment, ref.textSpan) | ||
| ); | ||
|
|
||
| //Only report starting tags | ||
| if (this.isEndTag(refLocation, snapshot)) { | ||
| return null; | ||
| } | ||
|
|
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| // Some references are in generated code but not wrapped with explicit ignore comments. | ||
| // These show up as zero-length ranges, so filter them out. | ||
| if (!hasNonZeroRange(refLocation)) { | ||
| return null; | ||
| } | ||
|
|
||
| return refLocation; | ||
| }) | ||
| ); | ||
|
|
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| return locations.filter(isNotNullOrUndefined); | ||
| } | ||
|
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| private offsetOfComponentExport(fragment: SvelteSnapshotFragment) { | ||
| return fragment.text.lastIndexOf(COMPONENT_SUFFIX); | ||
| } | ||
|
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| private isEndTag(element: Location, snapshot: DocumentSnapshot) { | ||
| if (!(snapshot instanceof SvelteDocumentSnapshot)) { | ||
| return false; | ||
| } | ||
|
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| const testEndTagRange = Range.create( | ||
| Position.create(element.range.start.line, element.range.start.character - 1), | ||
| element.range.end | ||
| ); | ||
|
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| const text = snapshot.getOriginalText(testEndTagRange); | ||
| if (text.substring(0, 1) == '/') { | ||
| return true; | ||
| } | ||
|
|
||
| return false; | ||
| } | ||
| } |
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