579 lines
24 KiB
TypeScript
579 lines
24 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 {AbsoluteSourceSpan, AST, ParseSourceSpan, TmplAstBoundEvent, TmplAstNode} from '@angular/compiler';
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import {CompilerOptions, ConfigurationHost, readConfiguration} from '@angular/compiler-cli';
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import {NgCompiler} from '@angular/compiler-cli/src/ngtsc/core';
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import {ErrorCode, ngErrorCode} from '@angular/compiler-cli/src/ngtsc/diagnostics';
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import {absoluteFrom, absoluteFromSourceFile, AbsoluteFsPath} from '@angular/compiler-cli/src/ngtsc/file_system';
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import {PerfPhase} from '@angular/compiler-cli/src/ngtsc/perf';
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import {ProgramDriver} from '@angular/compiler-cli/src/ngtsc/program_driver';
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import {isNamedClassDeclaration} from '@angular/compiler-cli/src/ngtsc/reflection';
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import {TypeCheckShimGenerator} from '@angular/compiler-cli/src/ngtsc/typecheck';
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import {OptimizeFor} from '@angular/compiler-cli/src/ngtsc/typecheck/api';
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import {findFirstMatchingNode} from '@angular/compiler-cli/src/ngtsc/typecheck/src/comments';
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import * as ts from 'typescript/lib/tsserverlibrary';
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import {GetComponentLocationsForTemplateResponse, GetTcbResponse} from '../api';
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import {LanguageServiceAdapter, LSParseConfigHost} from './adapters';
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import {CompilerFactory} from './compiler_factory';
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import {CompletionBuilder, CompletionNodeContext} from './completions';
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import {DefinitionBuilder} from './definitions';
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import {QuickInfoBuilder} from './quick_info';
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import {ReferencesBuilder, RenameBuilder} from './references_and_rename';
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import {createLocationKey} from './references_and_rename_utils';
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import {getSignatureHelp} from './signature_help';
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import {getTargetAtPosition, TargetContext, TargetNodeKind} from './template_target';
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import {findTightestNode, getClassDeclFromDecoratorProp, getPropertyAssignmentFromValue} from './ts_utils';
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import {getTemplateInfoAtPosition, isTypeScriptFile} from './utils';
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interface LanguageServiceConfig {
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/**
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* If true, enable `strictTemplates` in Angular compiler options regardless
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* of its value in tsconfig.json.
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*/
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forceStrictTemplates?: true;
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}
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export class LanguageService {
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private options: CompilerOptions;
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readonly compilerFactory: CompilerFactory;
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private readonly programDriver: ProgramDriver;
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private readonly adapter: LanguageServiceAdapter;
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private readonly parseConfigHost: LSParseConfigHost;
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constructor(
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private readonly project: ts.server.Project,
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private readonly tsLS: ts.LanguageService,
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private readonly config: LanguageServiceConfig,
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) {
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this.parseConfigHost = new LSParseConfigHost(project.projectService.host);
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this.options = parseNgCompilerOptions(project, this.parseConfigHost, config);
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logCompilerOptions(project, this.options);
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this.programDriver = createProgramDriver(project);
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this.adapter = new LanguageServiceAdapter(project);
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this.compilerFactory = new CompilerFactory(this.adapter, this.programDriver, this.options);
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this.watchConfigFile(project);
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}
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getCompilerOptions(): CompilerOptions {
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return this.options;
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}
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getSemanticDiagnostics(fileName: string): ts.Diagnostic[] {
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return this.withCompilerAndPerfTracing(PerfPhase.LsDiagnostics, (compiler) => {
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const ttc = compiler.getTemplateTypeChecker();
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const diagnostics: ts.Diagnostic[] = [];
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if (isTypeScriptFile(fileName)) {
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const program = compiler.getCurrentProgram();
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const sourceFile = program.getSourceFile(fileName);
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if (sourceFile) {
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const ngDiagnostics = compiler.getDiagnosticsForFile(sourceFile, OptimizeFor.SingleFile);
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// There are several kinds of diagnostics returned by `NgCompiler` for a source file:
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//
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// 1. Angular-related non-template diagnostics from decorated classes within that
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// file.
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// 2. Template diagnostics for components with direct inline templates (a string
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// literal).
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// 3. Template diagnostics for components with indirect inline templates (templates
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// computed
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// by expression).
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// 4. Template diagnostics for components with external templates.
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//
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// When showing diagnostics for a TS source file, we want to only include kinds 1 and
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// 2 - those diagnostics which are reported at a location within the TS file itself.
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// Diagnostics for external templates will be shown when editing that template file
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// (the `else` block) below.
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//
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// Currently, indirect inline template diagnostics (kind 3) are not shown at all by
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// the Language Service, because there is no sensible location in the user's code for
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// them. Such templates are an edge case, though, and should not be common.
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//
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// TODO(alxhub): figure out a good user experience for indirect template diagnostics
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// and show them from within the Language Service.
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diagnostics.push(...ngDiagnostics.filter(
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diag => diag.file !== undefined && diag.file.fileName === sourceFile.fileName));
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}
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} else {
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const components = compiler.getComponentsWithTemplateFile(fileName);
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for (const component of components) {
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if (ts.isClassDeclaration(component)) {
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diagnostics.push(...ttc.getDiagnosticsForComponent(component));
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}
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}
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}
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return diagnostics;
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});
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}
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getDefinitionAndBoundSpan(fileName: string, position: number): ts.DefinitionInfoAndBoundSpan
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|undefined {
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return this.withCompilerAndPerfTracing(PerfPhase.LsDefinition, (compiler) => {
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if (!isInAngularContext(compiler.getCurrentProgram(), fileName, position)) {
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return undefined;
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}
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return new DefinitionBuilder(this.tsLS, compiler)
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.getDefinitionAndBoundSpan(fileName, position);
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});
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}
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getTypeDefinitionAtPosition(fileName: string, position: number):
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readonly ts.DefinitionInfo[]|undefined {
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return this.withCompilerAndPerfTracing(PerfPhase.LsDefinition, (compiler) => {
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if (!isTemplateContext(compiler.getCurrentProgram(), fileName, position)) {
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return undefined;
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}
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return new DefinitionBuilder(this.tsLS, compiler)
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.getTypeDefinitionsAtPosition(fileName, position);
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});
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}
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getQuickInfoAtPosition(fileName: string, position: number): ts.QuickInfo|undefined {
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return this.withCompilerAndPerfTracing(PerfPhase.LsQuickInfo, (compiler) => {
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return this.getQuickInfoAtPositionImpl(fileName, position, compiler);
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});
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}
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private getQuickInfoAtPositionImpl(
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fileName: string,
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position: number,
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compiler: NgCompiler,
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): ts.QuickInfo|undefined {
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if (!isTemplateContext(compiler.getCurrentProgram(), fileName, position)) {
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return undefined;
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}
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const templateInfo = getTemplateInfoAtPosition(fileName, position, compiler);
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if (templateInfo === undefined) {
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return undefined;
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}
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const positionDetails = getTargetAtPosition(templateInfo.template, position);
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if (positionDetails === null) {
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return undefined;
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}
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// Because we can only show 1 quick info, just use the bound attribute if the target is a two
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// way binding. We may consider concatenating additional display parts from the other target
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// nodes or representing the two way binding in some other manner in the future.
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const node = positionDetails.context.kind === TargetNodeKind.TwoWayBindingContext ?
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positionDetails.context.nodes[0] :
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positionDetails.context.node;
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return new QuickInfoBuilder(this.tsLS, compiler, templateInfo.component, node).get();
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}
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getReferencesAtPosition(fileName: string, position: number): ts.ReferenceEntry[]|undefined {
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return this.withCompilerAndPerfTracing(PerfPhase.LsReferencesAndRenames, (compiler) => {
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const results = new ReferencesBuilder(this.programDriver, this.tsLS, compiler)
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.getReferencesAtPosition(fileName, position);
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return results === undefined ? undefined : getUniqueLocations(results);
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});
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}
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getRenameInfo(fileName: string, position: number): ts.RenameInfo {
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return this.withCompilerAndPerfTracing(PerfPhase.LsReferencesAndRenames, (compiler) => {
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const renameInfo = new RenameBuilder(this.programDriver, this.tsLS, compiler)
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.getRenameInfo(absoluteFrom(fileName), position);
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if (!renameInfo.canRename) {
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return renameInfo;
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}
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const quickInfo = this.getQuickInfoAtPositionImpl(fileName, position, compiler) ??
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this.tsLS.getQuickInfoAtPosition(fileName, position);
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const kind = quickInfo?.kind ?? ts.ScriptElementKind.unknown;
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const kindModifiers = quickInfo?.kindModifiers ?? ts.ScriptElementKind.unknown;
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return {...renameInfo, kind, kindModifiers};
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});
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}
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findRenameLocations(fileName: string, position: number): readonly ts.RenameLocation[]|undefined {
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return this.withCompilerAndPerfTracing(PerfPhase.LsReferencesAndRenames, (compiler) => {
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const results = new RenameBuilder(this.programDriver, this.tsLS, compiler)
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.findRenameLocations(fileName, position);
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return results === null ? undefined : getUniqueLocations(results);
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});
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}
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private getCompletionBuilder(fileName: string, position: number, compiler: NgCompiler):
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CompletionBuilder<TmplAstNode|AST>|null {
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const templateInfo = getTemplateInfoAtPosition(fileName, position, compiler);
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if (templateInfo === undefined) {
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return null;
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}
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const positionDetails = getTargetAtPosition(templateInfo.template, position);
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if (positionDetails === null) {
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return null;
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}
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// For two-way bindings, we actually only need to be concerned with the bound attribute because
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// the bindings in the template are written with the attribute name, not the event name.
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const node = positionDetails.context.kind === TargetNodeKind.TwoWayBindingContext ?
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positionDetails.context.nodes[0] :
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positionDetails.context.node;
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return new CompletionBuilder(
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this.tsLS, compiler, templateInfo.component, node, positionDetails);
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}
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getCompletionsAtPosition(
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fileName: string, position: number, options: ts.GetCompletionsAtPositionOptions|undefined):
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ts.WithMetadata<ts.CompletionInfo>|undefined {
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return this.withCompilerAndPerfTracing(PerfPhase.LsCompletions, (compiler) => {
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return this.getCompletionsAtPositionImpl(fileName, position, options, compiler);
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});
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}
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private getCompletionsAtPositionImpl(
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fileName: string, position: number, options: ts.GetCompletionsAtPositionOptions|undefined,
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compiler: NgCompiler): ts.WithMetadata<ts.CompletionInfo>|undefined {
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if (!isTemplateContext(compiler.getCurrentProgram(), fileName, position)) {
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return undefined;
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}
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const builder = this.getCompletionBuilder(fileName, position, compiler);
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if (builder === null) {
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return undefined;
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}
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return builder.getCompletionsAtPosition(options);
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}
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getCompletionEntryDetails(
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fileName: string, position: number, entryName: string,
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formatOptions: ts.FormatCodeOptions|ts.FormatCodeSettings|undefined,
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preferences: ts.UserPreferences|undefined,
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data: ts.CompletionEntryData|undefined): ts.CompletionEntryDetails|undefined {
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return this.withCompilerAndPerfTracing(PerfPhase.LsCompletions, (compiler) => {
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if (!isTemplateContext(compiler.getCurrentProgram(), fileName, position)) {
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return undefined;
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}
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const builder = this.getCompletionBuilder(fileName, position, compiler);
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if (builder === null) {
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return undefined;
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}
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return builder.getCompletionEntryDetails(entryName, formatOptions, preferences, data);
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});
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}
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getSignatureHelpItems(fileName: string, position: number, options?: ts.SignatureHelpItemsOptions):
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ts.SignatureHelpItems|undefined {
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return this.withCompilerAndPerfTracing(PerfPhase.LsSignatureHelp, compiler => {
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if (!isTemplateContext(compiler.getCurrentProgram(), fileName, position)) {
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return undefined;
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}
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return getSignatureHelp(compiler, this.tsLS, fileName, position, options);
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return undefined;
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});
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}
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getCompletionEntrySymbol(fileName: string, position: number, entryName: string): ts.Symbol
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|undefined {
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return this.withCompilerAndPerfTracing(PerfPhase.LsCompletions, (compiler) => {
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if (!isTemplateContext(compiler.getCurrentProgram(), fileName, position)) {
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return undefined;
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}
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const builder = this.getCompletionBuilder(fileName, position, compiler);
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if (builder === null) {
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return undefined;
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}
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const result = builder.getCompletionEntrySymbol(entryName);
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return result;
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});
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}
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getComponentLocationsForTemplate(fileName: string): GetComponentLocationsForTemplateResponse {
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return this.withCompilerAndPerfTracing<GetComponentLocationsForTemplateResponse>(
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PerfPhase.LsComponentLocations, (compiler) => {
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const components = compiler.getComponentsWithTemplateFile(fileName);
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const componentDeclarationLocations: ts.DocumentSpan[] =
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Array.from(components.values()).map(c => {
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let contextSpan: ts.TextSpan|undefined = undefined;
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let textSpan: ts.TextSpan;
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if (isNamedClassDeclaration(c)) {
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textSpan = ts.createTextSpanFromBounds(c.name.getStart(), c.name.getEnd());
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contextSpan = ts.createTextSpanFromBounds(c.getStart(), c.getEnd());
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} else {
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textSpan = ts.createTextSpanFromBounds(c.getStart(), c.getEnd());
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}
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return {
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fileName: c.getSourceFile().fileName,
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textSpan,
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contextSpan,
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};
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});
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return componentDeclarationLocations;
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});
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}
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getTcb(fileName: string, position: number): GetTcbResponse|undefined {
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return this.withCompilerAndPerfTracing<GetTcbResponse|undefined>(PerfPhase.LsTcb, compiler => {
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const templateInfo = getTemplateInfoAtPosition(fileName, position, compiler);
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if (templateInfo === undefined) {
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return undefined;
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}
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const tcb = compiler.getTemplateTypeChecker().getTypeCheckBlock(templateInfo.component);
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if (tcb === null) {
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return undefined;
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}
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const sf = tcb.getSourceFile();
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let selections: ts.TextSpan[] = [];
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const target = getTargetAtPosition(templateInfo.template, position);
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if (target !== null) {
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let selectionSpans: Array<ParseSourceSpan|AbsoluteSourceSpan>;
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if ('nodes' in target.context) {
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selectionSpans = target.context.nodes.map(n => n.sourceSpan);
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} else {
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selectionSpans = [target.context.node.sourceSpan];
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}
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const selectionNodes: ts.Node[] =
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selectionSpans
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.map(s => findFirstMatchingNode(tcb, {
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withSpan: s,
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filter: (node: ts.Node): node is ts.Node => true,
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}))
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.filter((n): n is ts.Node => n !== null);
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selections = selectionNodes.map(n => {
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return {
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start: n.getStart(sf),
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length: n.getEnd() - n.getStart(sf),
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};
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});
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}
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return {
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fileName: sf.fileName,
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content: sf.getFullText(),
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selections,
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};
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});
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}
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/**
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* Provides an instance of the `NgCompiler` and traces perf results. Perf results are logged only
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* if the log level is verbose or higher. This method is intended to be called once per public
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* method call.
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*
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* Here is an example of the log output.
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*
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* Perf 245 [16:16:39.353] LanguageService#getQuickInfoAtPosition(): {"events":{},"phases":{
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* "Unaccounted":379,"TtcSymbol":4},"memory":{}}
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*
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* Passing name of caller instead of using `arguments.caller` because 'caller', 'callee', and
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* 'arguments' properties may not be accessed in strict mode.
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*
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* @param phase the `PerfPhase` to execute the `p` callback in
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* @param p callback to be run synchronously with an instance of the `NgCompiler` as argument
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* @return the result of running the `p` callback
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*/
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private withCompilerAndPerfTracing<T>(phase: PerfPhase, p: (compiler: NgCompiler) => T): T {
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const compiler = this.compilerFactory.getOrCreate();
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const result = compiler.perfRecorder.inPhase(phase, () => p(compiler));
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const logger = this.project.projectService.logger;
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if (logger.hasLevel(ts.server.LogLevel.verbose)) {
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logger.perftrc(`LanguageService#${PerfPhase[phase]}: ${
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JSON.stringify(compiler.perfRecorder.finalize())}`);
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}
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return result;
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}
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getCompilerOptionsDiagnostics(): ts.Diagnostic[] {
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const project = this.project;
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if (!(project instanceof ts.server.ConfiguredProject)) {
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return [];
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}
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return this.withCompilerAndPerfTracing(PerfPhase.LsDiagnostics, (compiler) => {
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const diagnostics: ts.Diagnostic[] = [];
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const configSourceFile = ts.readJsonConfigFile(
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project.getConfigFilePath(), (path: string) => project.readFile(path));
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if (!this.options.strictTemplates && !this.options.fullTemplateTypeCheck) {
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diagnostics.push({
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messageText: 'Some language features are not available. ' +
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'To access all features, enable `strictTemplates` in `angularCompilerOptions`.',
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category: ts.DiagnosticCategory.Suggestion,
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code: ngErrorCode(ErrorCode.SUGGEST_STRICT_TEMPLATES),
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file: configSourceFile,
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start: undefined,
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length: undefined,
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});
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}
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diagnostics.push(...compiler.getOptionDiagnostics());
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return diagnostics;
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});
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}
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private watchConfigFile(project: ts.server.Project) {
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// TODO: Check the case when the project is disposed. An InferredProject
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// could be disposed when a tsconfig.json is added to the workspace,
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// in which case it becomes a ConfiguredProject (or vice-versa).
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// We need to make sure that the FileWatcher is closed.
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if (!(project instanceof ts.server.ConfiguredProject)) {
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return;
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}
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const {host} = project.projectService;
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host.watchFile(
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project.getConfigFilePath(), (fileName: string, eventKind: ts.FileWatcherEventKind) => {
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project.log(`Config file changed: ${fileName}`);
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if (eventKind === ts.FileWatcherEventKind.Changed) {
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this.options = parseNgCompilerOptions(project, this.parseConfigHost, this.config);
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logCompilerOptions(project, this.options);
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}
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});
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}
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}
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function logCompilerOptions(project: ts.server.Project, options: CompilerOptions) {
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const {logger} = project.projectService;
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const projectName = project.getProjectName();
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logger.info(`Angular compiler options for ${projectName}: ` + JSON.stringify(options, null, 2));
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}
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function parseNgCompilerOptions(
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project: ts.server.Project, host: ConfigurationHost,
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config: LanguageServiceConfig): CompilerOptions {
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if (!(project instanceof ts.server.ConfiguredProject)) {
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return {};
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}
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const {options, errors} =
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readConfiguration(project.getConfigFilePath(), /* existingOptions */ undefined, host);
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if (errors.length > 0) {
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project.setProjectErrors(errors);
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}
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// Projects loaded into the Language Service often include test files which are not part of the
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// app's main compilation unit, and these test files often include inline NgModules that declare
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// components from the app. These declarations conflict with the main declarations of such
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// components in the app's NgModules. This conflict is not normally present during regular
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// compilation because the app and the tests are part of separate compilation units.
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//
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// As a temporary mitigation of this problem, we instruct the compiler to ignore classes which
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// are not exported. In many cases, this ensures the test NgModules are ignored by the compiler
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// and only the real component declaration is used.
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options.compileNonExportedClasses = false;
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|
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// If `forceStrictTemplates` is true, always enable `strictTemplates`
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// regardless of its value in tsconfig.json.
|
|
if (config.forceStrictTemplates === true) {
|
|
options.strictTemplates = true;
|
|
}
|
|
|
|
return options;
|
|
}
|
|
|
|
function createProgramDriver(project: ts.server.Project): ProgramDriver {
|
|
return {
|
|
supportsInlineOperations: false,
|
|
getProgram(): ts.Program {
|
|
const program = project.getLanguageService().getProgram();
|
|
if (!program) {
|
|
throw new Error('Language service does not have a program!');
|
|
}
|
|
return program;
|
|
},
|
|
updateFiles(contents: Map<AbsoluteFsPath, string>) {
|
|
for (const [fileName, newText] of contents) {
|
|
const scriptInfo = getOrCreateTypeCheckScriptInfo(project, fileName);
|
|
const snapshot = scriptInfo.getSnapshot();
|
|
const length = snapshot.getLength();
|
|
scriptInfo.editContent(0, length, newText);
|
|
}
|
|
},
|
|
getSourceFileVersion(sf: ts.SourceFile): string {
|
|
return project.getScriptVersion(sf.fileName);
|
|
}
|
|
};
|
|
}
|
|
|
|
function getOrCreateTypeCheckScriptInfo(
|
|
project: ts.server.Project, tcf: string): ts.server.ScriptInfo {
|
|
// First check if there is already a ScriptInfo for the tcf
|
|
const {projectService} = project;
|
|
let scriptInfo = projectService.getScriptInfo(tcf);
|
|
if (!scriptInfo) {
|
|
// ScriptInfo needs to be opened by client to be able to set its user-defined
|
|
// content. We must also provide file content, otherwise the service will
|
|
// attempt to fetch the content from disk and fail.
|
|
scriptInfo = projectService.getOrCreateScriptInfoForNormalizedPath(
|
|
ts.server.toNormalizedPath(tcf),
|
|
true, // openedByClient
|
|
'', // fileContent
|
|
// script info added by plugins should be marked as external, see
|
|
// https://github.com/microsoft/TypeScript/blob/b217f22e798c781f55d17da72ed099a9dee5c650/src/compiler/program.ts#L1897-L1899
|
|
ts.ScriptKind.External, // scriptKind
|
|
);
|
|
if (!scriptInfo) {
|
|
throw new Error(`Failed to create script info for ${tcf}`);
|
|
}
|
|
}
|
|
// Add ScriptInfo to project if it's missing. A ScriptInfo needs to be part of
|
|
// the project so that it becomes part of the program.
|
|
if (!project.containsScriptInfo(scriptInfo)) {
|
|
project.addRoot(scriptInfo);
|
|
}
|
|
return scriptInfo;
|
|
}
|
|
|
|
function isTemplateContext(program: ts.Program, fileName: string, position: number): boolean {
|
|
if (!isTypeScriptFile(fileName)) {
|
|
// If we aren't in a TS file, we must be in an HTML file, which we treat as template context
|
|
return true;
|
|
}
|
|
|
|
const node = findTightestNodeAtPosition(program, fileName, position);
|
|
if (node === undefined) {
|
|
return false;
|
|
}
|
|
|
|
let asgn = getPropertyAssignmentFromValue(node, 'template');
|
|
if (asgn === null) {
|
|
return false;
|
|
}
|
|
return getClassDeclFromDecoratorProp(asgn) !== null;
|
|
}
|
|
|
|
function isInAngularContext(program: ts.Program, fileName: string, position: number) {
|
|
if (!isTypeScriptFile(fileName)) {
|
|
return true;
|
|
}
|
|
|
|
const node = findTightestNodeAtPosition(program, fileName, position);
|
|
if (node === undefined) {
|
|
return false;
|
|
}
|
|
|
|
const asgn = getPropertyAssignmentFromValue(node, 'template') ??
|
|
getPropertyAssignmentFromValue(node, 'templateUrl') ??
|
|
getPropertyAssignmentFromValue(node.parent, 'styleUrls');
|
|
return asgn !== null && getClassDeclFromDecoratorProp(asgn) !== null;
|
|
}
|
|
|
|
function findTightestNodeAtPosition(program: ts.Program, fileName: string, position: number) {
|
|
const sourceFile = program.getSourceFile(fileName);
|
|
if (sourceFile === undefined) {
|
|
return undefined;
|
|
}
|
|
|
|
return findTightestNode(sourceFile, position);
|
|
}
|
|
|
|
function getUniqueLocations<T extends ts.DocumentSpan>(locations: readonly T[]): T[] {
|
|
const uniqueLocations: Map<string, T> = new Map();
|
|
for (const location of locations) {
|
|
uniqueLocations.set(createLocationKey(location), location);
|
|
}
|
|
return Array.from(uniqueLocations.values());
|
|
}
|