d1ea1f4c7f
Update the license headers throughout the repository to reference Google LLC rather than Google Inc, for the required license headers. PR Close #37205
75 lines
3.1 KiB
TypeScript
75 lines
3.1 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {Statement} from '@angular/compiler';
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import MagicString from 'magic-string';
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import * as ts from 'typescript';
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import {NOOP_DEFAULT_IMPORT_RECORDER} from '../../../src/ngtsc/imports';
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import {ImportManager, translateStatement} from '../../../src/ngtsc/translator';
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import {CompiledClass} from '../analysis/types';
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import {getContainingStatement} from '../host/esm2015_host';
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import {EsmRenderingFormatter} from './esm_rendering_formatter';
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/**
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* A RenderingFormatter that works with files that use ECMAScript Module `import` and `export`
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* statements, but instead of `class` declarations it uses ES5 `function` wrappers for classes.
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*/
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export class Esm5RenderingFormatter extends EsmRenderingFormatter {
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/**
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* Add the definitions, directly before the return statement, inside the IIFE of each decorated
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* class.
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*/
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addDefinitions(output: MagicString, compiledClass: CompiledClass, definitions: string): void {
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const classSymbol = this.host.getClassSymbol(compiledClass.declaration);
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if (!classSymbol) {
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throw new Error(
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`Compiled class "${compiledClass.name}" in "${
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compiledClass.declaration.getSourceFile()
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.fileName}" does not have a valid syntax.\n` +
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`Expected an ES5 IIFE wrapped function. But got:\n` +
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compiledClass.declaration.getText());
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}
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const declarationStatement =
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getContainingStatement(classSymbol.implementation.valueDeclaration);
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const iifeBody = declarationStatement.parent;
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if (!iifeBody || !ts.isBlock(iifeBody)) {
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throw new Error(`Compiled class declaration is not inside an IIFE: ${compiledClass.name} in ${
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compiledClass.declaration.getSourceFile().fileName}`);
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}
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const returnStatement = iifeBody.statements.find(ts.isReturnStatement);
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if (!returnStatement) {
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throw new Error(`Compiled class wrapper IIFE does not have a return statement: ${
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compiledClass.name} in ${compiledClass.declaration.getSourceFile().fileName}`);
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}
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const insertionPoint = returnStatement.getFullStart();
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output.appendLeft(insertionPoint, '\n' + definitions);
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}
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/**
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* Convert a `Statement` to JavaScript code in a format suitable for rendering by this formatter.
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*
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* @param stmt The `Statement` to print.
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* @param sourceFile A `ts.SourceFile` that provides context for the statement. See
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* `ts.Printer#printNode()` for more info.
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* @param importManager The `ImportManager` to use for managing imports.
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*
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* @return The JavaScript code corresponding to `stmt` (in the appropriate format).
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*/
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printStatement(stmt: Statement, sourceFile: ts.SourceFile, importManager: ImportManager): string {
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const node =
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translateStatement(stmt, importManager, NOOP_DEFAULT_IMPORT_RECORDER, ts.ScriptTarget.ES5);
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const code = this.printer.printNode(ts.EmitHint.Unspecified, node, sourceFile);
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return code;
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}
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}
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