175 lines
6.9 KiB
TypeScript
175 lines
6.9 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 {CompilerOptions, createNgCompilerOptions} from '@angular/compiler-cli';
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import {NgCompiler} from '@angular/compiler-cli/src/ngtsc/core';
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import {absoluteFromSourceFile, AbsoluteFsPath} from '@angular/compiler-cli/src/ngtsc/file_system';
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import {PatchedProgramIncrementalBuildStrategy} from '@angular/compiler-cli/src/ngtsc/incremental';
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import {TypeCheckShimGenerator} from '@angular/compiler-cli/src/ngtsc/typecheck';
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import {OptimizeFor, TypeCheckingProgramStrategy} from '@angular/compiler-cli/src/ngtsc/typecheck/api';
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import * as ts from 'typescript/lib/tsserverlibrary';
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import {DefinitionBuilder} from './definitions';
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import {isExternalTemplate, isTypeScriptFile, LanguageServiceAdapter} from './language_service_adapter';
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import {QuickInfoBuilder} from './quick_info';
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export class LanguageService {
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private options: CompilerOptions;
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private lastKnownProgram: ts.Program|null = null;
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private readonly strategy: TypeCheckingProgramStrategy;
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private readonly adapter: LanguageServiceAdapter;
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constructor(project: ts.server.Project, private readonly tsLS: ts.LanguageService) {
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this.options = parseNgCompilerOptions(project);
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this.strategy = createTypeCheckingProgramStrategy(project);
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this.adapter = new LanguageServiceAdapter(project);
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this.watchConfigFile(project);
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}
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getSemanticDiagnostics(fileName: string): ts.Diagnostic[] {
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const program = this.strategy.getProgram();
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const compiler = this.createCompiler(program, fileName);
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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 sourceFile = program.getSourceFile(fileName);
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if (sourceFile) {
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diagnostics.push(...ttc.getDiagnosticsForFile(sourceFile, OptimizeFor.SingleFile));
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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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this.lastKnownProgram = compiler.getNextProgram();
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return diagnostics;
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}
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getDefinitionAndBoundSpan(fileName: string, position: number): ts.DefinitionInfoAndBoundSpan
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|undefined {
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const program = this.strategy.getProgram();
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const compiler = this.createCompiler(program, fileName);
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return new DefinitionBuilder(this.tsLS, compiler).getDefinitionAndBoundSpan(fileName, position);
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}
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getQuickInfoAtPosition(fileName: string, position: number): ts.QuickInfo|undefined {
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const program = this.strategy.getProgram();
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const compiler = this.createCompiler(program, fileName);
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return new QuickInfoBuilder(this.tsLS, compiler).get(fileName, position);
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}
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/**
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* Create a new instance of Ivy compiler.
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* If the specified `fileName` refers to an external template, check if it has
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* changed since the last time it was read. If it has changed, signal the
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* compiler to reload the file via the adapter.
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*/
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private createCompiler(program: ts.Program, fileName: string): NgCompiler {
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if (isExternalTemplate(fileName)) {
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this.adapter.registerTemplateUpdate(fileName);
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}
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return new NgCompiler(
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this.adapter,
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this.options,
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program,
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this.strategy,
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new PatchedProgramIncrementalBuildStrategy(),
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/** enableTemplateTypeChecker */ true,
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this.lastKnownProgram,
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/** perfRecorder (use default) */ undefined,
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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);
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}
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});
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}
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}
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export function parseNgCompilerOptions(project: ts.server.Project): CompilerOptions {
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let config = {};
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if (project instanceof ts.server.ConfiguredProject) {
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const configPath = project.getConfigFilePath();
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const result = ts.readConfigFile(configPath, path => project.readFile(path));
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if (result.error) {
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project.error(ts.flattenDiagnosticMessageText(result.error.messageText, '\n'));
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}
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config = result.config || config;
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}
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const basePath = project.getCurrentDirectory();
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return createNgCompilerOptions(basePath, config, project.getCompilationSettings());
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}
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function createTypeCheckingProgramStrategy(project: ts.server.Project):
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TypeCheckingProgramStrategy {
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return {
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supportsInlineOperations: false,
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shimPathForComponent(component: ts.ClassDeclaration): AbsoluteFsPath {
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return TypeCheckShimGenerator.shimFor(absoluteFromSourceFile(component.getSourceFile()));
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},
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getProgram(): ts.Program {
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const program = project.getLanguageService().getProgram();
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if (!program) {
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throw new Error('Language service does not have a program!');
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}
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return program;
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},
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updateFiles(contents: Map<AbsoluteFsPath, string>) {
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for (const [fileName, newText] of contents) {
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const scriptInfo = getOrCreateTypeCheckScriptInfo(project, fileName);
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const snapshot = scriptInfo.getSnapshot();
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const length = snapshot.getLength();
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scriptInfo.editContent(0, length, newText);
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}
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},
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};
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}
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function getOrCreateTypeCheckScriptInfo(
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project: ts.server.Project, tcf: string): ts.server.ScriptInfo {
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// First check if there is already a ScriptInfo for the tcf
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const {projectService} = project;
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let scriptInfo = projectService.getScriptInfo(tcf);
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if (!scriptInfo) {
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// ScriptInfo needs to be opened by client to be able to set its user-defined
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// content. We must also provide file content, otherwise the service will
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// attempt to fetch the content from disk and fail.
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scriptInfo = projectService.getOrCreateScriptInfoForNormalizedPath(
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ts.server.toNormalizedPath(tcf),
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true, // openedByClient
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'', // fileContent
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ts.ScriptKind.TS, // scriptKind
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);
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if (!scriptInfo) {
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throw new Error(`Failed to create script info for ${tcf}`);
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}
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}
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// Add ScriptInfo to project if it's missing. A ScriptInfo needs to be part of
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// the project so that it becomes part of the program.
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if (!project.containsScriptInfo(scriptInfo)) {
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project.addRoot(scriptInfo);
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}
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return scriptInfo;
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}
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