Add refactor to convert namespace to named imports and back#24469
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| const importDecl = getParentNodeInSpan(token, file, span); | ||
| if (!importDecl || !isImportDeclaration(importDecl)) return undefined; | ||
| const { importClause } = importDecl; | ||
| return importClause && importClause.namedBindings; |
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should we verify that the namedBindings is within the span..
e.g. selecting d in import d, * as ns from "./mod" should not trigger any action..
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Added a test. If just d is selected, getParentNodeInSpan will return just d and not the entire import declaration.
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| forEachFreeIdentifier(sourceFile, id => { | ||
| if (!toConvert.elements.some(e => e.name === id) && contains(importedSymbols, checker.getSymbolAtLocation(id))) { | ||
| changes.replaceNode(sourceFile, id, createPropertyAccess(createIdentifier(namespaceImportName), nameToPropertyName.get(id.text) || id.text)); |
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what if thsi is a type position? this needs to be a qualifiedName instead.
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Added a test -- this should work as well either way since we're just changing text and not creating a new tree.
src/services/utilities.ts
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| function isFreeIdentifier(node: Identifier): boolean { | ||
| const { parent } = node; | ||
| switch (parent.kind) { | ||
| case SyntaxKind.PropertyAccessExpression: |
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i am not sure i understand what this does.. and why not the name?
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| const importedSymbols = toConvert.elements.map(e => checker.getSymbolAtLocation(e.name)!); | ||
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| forEachFreeIdentifier(sourceFile, id => { |
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why not just find all references on the ImportSpecifier and change these instead of looking at all identifiers..
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also we need to handle cases where the propertyAccess expression will not work.. e.g. shorthandproperties, var x = {a}, changing it to var x = { m.a } will not work, you need to change it to var x = { a: m.a }. similarly the export declarations need to be handled separately.. so export {a} will have to be rewritten either as export {a} from "mod" or import a = m.a; export {a};
| forEachFreeIdentifier(sourceFile, id => { | ||
| if (id === toConvert.name || checker.getSymbolAtLocation(id) !== namespaceSymbol) return; | ||
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| if (!isPropertyAccessExpression(id.parent)) { |
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what if it is used in a call expression.. import * as n from "mod"; n();?
if allowSyntheticDefaultImport or esModuleInterop are on, then you can change it to import {default as n} from "mod"; n();, if not, we need to keep the namespace import around.. do not think there is another way to handle that.
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thanks for the comment, but still why not findAllRefs? |
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| function doChange(sourceFile: SourceFile, program: Program, changes: textChanges.ChangeTracker, toConvert: NamedImportBindings): void { | ||
| const usedIdentifiers = createMap<true>(); | ||
| forEachFreeIdentifier(sourceFile, id => usedIdentifiers.set(id.text, true)); |
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Looks like isFileLevelUniqueName isn't suitable for this purpose since sourceFile.identifiers includes the text of every Identifier node in the source file, including the names in property accesses. So if we access import * as m from "m"; m.x then that would make us convert it to import { x as _ x } from "m"; unnecessarily.
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D'oh.. did not think of this one.. i guess we need a walk after all.
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one other option is to call resolveName for the property name on every reference for the namespace import, if it resolves to anything then you know you need to alias it.
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Fixes #24044 and half of #19260