01f711281c
This is important to not confuse users nor downstream tools that consume our source maps. For generated content for which we don’t have an original source file, we use the generated file now. Fixes #19538
83 lines
2.8 KiB
TypeScript
83 lines
2.8 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. 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 {StaticSymbol} from '../aot/static_symbol';
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import {CompileIdentifierMetadata} from '../compile_metadata';
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import {EmitterVisitorContext, OutputEmitter} from './abstract_emitter';
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import {AbstractJsEmitterVisitor} from './abstract_js_emitter';
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import * as o from './output_ast';
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export class JavaScriptEmitter implements OutputEmitter {
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emitStatements(genFilePath: string, stmts: o.Statement[], preamble: string = ''): string {
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const converter = new JsEmitterVisitor();
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const ctx = EmitterVisitorContext.createRoot();
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converter.visitAllStatements(stmts, ctx);
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const preambleLines = preamble ? preamble.split('\n') : [];
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converter.importsWithPrefixes.forEach((prefix, importedModuleName) => {
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// Note: can't write the real word for import as it screws up system.js auto detection...
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preambleLines.push(
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`var ${prefix} = req` +
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`uire('${importedModuleName}');`);
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});
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const sm = ctx.toSourceMapGenerator(genFilePath, preambleLines.length).toJsComment();
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const lines = [...preambleLines, ctx.toSource(), sm];
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if (sm) {
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// always add a newline at the end, as some tools have bugs without it.
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lines.push('');
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}
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return lines.join('\n');
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}
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}
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class JsEmitterVisitor extends AbstractJsEmitterVisitor {
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importsWithPrefixes = new Map<string, string>();
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visitExternalExpr(ast: o.ExternalExpr, ctx: EmitterVisitorContext): any {
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const {name, moduleName} = ast.value;
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if (moduleName) {
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let prefix = this.importsWithPrefixes.get(moduleName);
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if (prefix == null) {
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prefix = `i${this.importsWithPrefixes.size}`;
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this.importsWithPrefixes.set(moduleName, prefix);
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}
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ctx.print(ast, `${prefix}.`);
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}
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ctx.print(ast, name !);
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return null;
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}
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visitDeclareVarStmt(stmt: o.DeclareVarStmt, ctx: EmitterVisitorContext): any {
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super.visitDeclareVarStmt(stmt, ctx);
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if (stmt.hasModifier(o.StmtModifier.Exported)) {
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ctx.println(stmt, exportVar(stmt.name));
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}
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return null;
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}
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visitDeclareFunctionStmt(stmt: o.DeclareFunctionStmt, ctx: EmitterVisitorContext): any {
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super.visitDeclareFunctionStmt(stmt, ctx);
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if (stmt.hasModifier(o.StmtModifier.Exported)) {
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ctx.println(stmt, exportVar(stmt.name));
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}
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return null;
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}
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visitDeclareClassStmt(stmt: o.ClassStmt, ctx: EmitterVisitorContext): any {
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super.visitDeclareClassStmt(stmt, ctx);
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if (stmt.hasModifier(o.StmtModifier.Exported)) {
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ctx.println(stmt, exportVar(stmt.name));
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}
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return null;
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}
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}
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function exportVar(varName: string): string {
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return `Object.defineProperty(exports, '${varName}', { get: function() { return ${varName}; }});`;
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}
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