feat(language-service): support TS2.2 plugin model

modules/@angular/compiler/src/aot/static_reflector.ts

@@ -84,7 +84,7 @@ export class StaticReflector implements ReflectorReader {
       const classMetadata = this.getTypeMetadata(type);
       if (classMetadata['extends']) {
         const parentType = this.simplify(type, classMetadata['extends']);
-        if (parentType instanceof StaticSymbol) {
+        if (parentType && (parentType instanceof StaticSymbol)) {
           const parentAnnotations = this.annotations(parentType);
           annotations.push(...parentAnnotations);
         }

modules/@angular/language-service/index.ts

@@ -11,11 +11,8 @@
  * @description
  * Entry point for all public APIs of the language service package.
  */
-import {LanguageServicePlugin} from './src/ts_plugin';
-
 export {createLanguageService} from './src/language_service';
+export {create} from './src/ts_plugin';
 export {Completion, Completions, Declaration, Declarations, Definition, Diagnostic, Diagnostics, Hover, HoverTextSection, LanguageService, LanguageServiceHost, Location, Span, TemplateSource, TemplateSources} from './src/types';
 export {TypeScriptServiceHost, createLanguageServiceFromTypescript} from './src/typescript_host';
 export {VERSION} from './src/version';
-
-export default LanguageServicePlugin;

modules/@angular/language-service/src/language_service.ts

@@ -107,8 +107,9 @@ class LanguageServiceImpl implements LanguageService {
   getTemplateAst(template: TemplateSource, contextFile: string): AstResult {
     let result: AstResult;
     try {
-      const {metadata} =
+      const resolvedMetadata =
           this.metadataResolver.getNonNormalizedDirectiveMetadata(template.type as any);
+      const metadata = resolvedMetadata && resolvedMetadata.metadata;
       if (metadata) {
         const rawHtmlParser = new HtmlParser();
         const htmlParser = new I18NHtmlParser(rawHtmlParser);
@@ -124,9 +125,10 @@ class LanguageServiceImpl implements LanguageService {
           ngModule = findSuitableDefaultModule(analyzedModules);
         }
         if (ngModule) {
-          const directives = ngModule.transitiveModule.directives.map(
-              d => this.host.resolver.getNonNormalizedDirectiveMetadata(d.reference)
-                       .metadata.toSummary());
+          const resolvedDirectives = ngModule.transitiveModule.directives.map(
+              d => this.host.resolver.getNonNormalizedDirectiveMetadata(d.reference));
+          const directives =
+              resolvedDirectives.filter(d => d !== null).map(d => d.metadata.toSummary());
           const pipes = ngModule.transitiveModule.pipes.map(
               p => this.host.resolver.getOrLoadPipeMetadata(p.reference).toSummary());
           const schemas = ngModule.schemas;

modules/@angular/language-service/src/ts_plugin.ts

@@ -9,67 +9,125 @@
 import * as ts from 'typescript';
 
 import {createLanguageService} from './language_service';
-import {LanguageService, LanguageServiceHost} from './types';
+import {Completion, Diagnostic, LanguageService, LanguageServiceHost} from './types';
 import {TypeScriptServiceHost} from './typescript_host';
 
+export function create(info: any /* ts.server.PluginCreateInfo */): ts.LanguageService {
+  // Create the proxy
+  const proxy: ts.LanguageService = Object.create(null);
+  const oldLS: ts.LanguageService = info.languageService;
+  for (const k in oldLS) {
+    (<any>proxy)[k] = function() { return (oldLS as any)[k].apply(oldLS, arguments); };
+  }
 
-/** A plugin to TypeScript's langauge service that provide language services for
- * templates in string literals.
- *
- * @experimental
- */
-export class LanguageServicePlugin {
-  private serviceHost: TypeScriptServiceHost;
-  private service: LanguageService;
-  private host: ts.LanguageServiceHost;
+  function completionToEntry(c: Completion): ts.CompletionEntry {
+    return {kind: c.kind, name: c.name, sortText: c.sort, kindModifiers: ''};
+  }
 
-  static 'extension-kind' = 'language-service';
+  function diagnosticToDiagnostic(d: Diagnostic, file: ts.SourceFile): ts.Diagnostic {
+    return {
+      file,
+      start: d.span.start,
+      length: d.span.end - d.span.start,
+      messageText: d.message,
+      category: ts.DiagnosticCategory.Error,
+      code: 0
+    };
+  }
 
-  constructor(config: {
-    host: ts.LanguageServiceHost; service: ts.LanguageService;
-    registry?: ts.DocumentRegistry, args?: any
-  }) {
-    this.host = config.host;
-    this.serviceHost = new TypeScriptServiceHost(config.host, config.service);
-    this.service = createLanguageService(this.serviceHost);
-    this.serviceHost.setSite(this.service);
+  function tryOperation(attempting: string, callback: () => void) {
+    try {
+      callback();
+    } catch (e) {
+      info.project.projectService.logger.info(`Failed to ${attempting}: ${e.toString()}`);
+      info.project.projectService.logger.info(`Stack trace: ${e.stack}`);
+    }
   }
 
-  /**
-   * Augment the diagnostics reported by TypeScript with errors from the templates in string
-   * literals.
-   */
-  getSemanticDiagnosticsFilter(fileName: string, previous: ts.Diagnostic[]): ts.Diagnostic[] {
-    let errors = this.service.getDiagnostics(fileName);
-    if (errors && errors.length) {
-      let file = this.serviceHost.getSourceFile(fileName);
-      for (const error of errors) {
-        previous.push({
-          file,
-          start: error.span.start,
-          length: error.span.end - error.span.start,
-          messageText: error.message,
-          category: ts.DiagnosticCategory.Error,
-          code: 0
-        });
+  const serviceHost = new TypeScriptServiceHost(info.languageServiceHost, info.languageService);
+  const ls = createLanguageService(serviceHost);
+  serviceHost.setSite(ls);
+
+  proxy.getCompletionsAtPosition = function(fileName: string, position: number) {
+    let base = oldLS.getCompletionsAtPosition(fileName, position);
+    tryOperation('get completions', () => {
+      const results = ls.getCompletionsAt(fileName, position);
+      if (results && results.length) {
+        if (base === undefined) {
+          base = {isMemberCompletion: false, isNewIdentifierLocation: false, entries: []};
+        }
+        for (const entry of results) {
+          base.entries.push(completionToEntry(entry));
+        }
+      }
+    });
+    return base;
+  };
+
+  proxy.getQuickInfoAtPosition = function(fileName: string, position: number): ts.QuickInfo {
+    let base = oldLS.getQuickInfoAtPosition(fileName, position);
+    tryOperation('get quick info', () => {
+      const ours = ls.getHoverAt(fileName, position);
+      if (ours) {
+        const displayParts: typeof base.displayParts = [];
+        for (const part of ours.text) {
+          displayParts.push({kind: part.language, text: part.text});
+        }
+        base = {
+          displayParts,
+          documentation: [],
+          kind: 'angular',
+          kindModifiers: 'what does this do?',
+          textSpan: {start: ours.span.start, length: ours.span.end - ours.span.start}
+        };
       }
+    });
+
+    return base;
+  };
+
+  proxy.getSemanticDiagnostics = function(fileName: string) {
+    let base = oldLS.getSemanticDiagnostics(fileName);
+    if (base === undefined) {
+      base = [];
     }
-    return previous;
-  }
+    tryOperation('get diagnostics', () => {
+      info.project.projectService.logger.info(`Computing Angular semantic diagnostics...`);
+      const ours = ls.getDiagnostics(fileName);
+      if (ours && ours.length) {
+        const file = oldLS.getProgram().getSourceFile(fileName);
+        base.push.apply(base, ours.map(d => diagnosticToDiagnostic(d, file)));
+      }
+    });
+
+    return base;
+  };
 
-  /**
-   * Get completions for angular templates if one is at the given position.
-   */
-  getCompletionsAtPosition(fileName: string, position: number): ts.CompletionInfo {
-    let result = this.service.getCompletionsAt(fileName, position);
-    if (result) {
-      return {
-        isMemberCompletion: false,
-        isNewIdentifierLocation: false,
-        entries: result.map<ts.CompletionEntry>(
-            entry =>
-                ({name: entry.name, kind: entry.kind, kindModifiers: '', sortText: entry.sort}))
-      };
+  proxy.getDefinitionAtPosition = function(
+                                      fileName: string, position: number): ts.DefinitionInfo[] {
+    let base = oldLS.getDefinitionAtPosition(fileName, position);
+    if (base && base.length) {
+      return base;
     }
-  }
-}
+
+    tryOperation('get definition', () => {
+      const ours = ls.getDefinitionAt(fileName, position);
+      if (ours && ours.length) {
+        base = base || [];
+        for (const loc of ours) {
+          base.push({
+            fileName: loc.fileName,
+            textSpan: {start: loc.span.start, length: loc.span.end - loc.span.start},
+            name: '',
+            kind: 'definition',
+            containerName: loc.fileName,
+            containerKind: 'file'
+          });
+        }
+      }
+    });
+    return base;
+  };
+
+  return proxy;
+}

modules/@angular/language-service/test/test_utils.ts

@@ -71,12 +71,13 @@ export class MockTypescriptHost implements ts.LanguageServiceHost {
   private projectVersion = 0;
 
   constructor(private scriptNames: string[], private data: MockData) {
-    let angularIndex = module.filename.indexOf('@angular');
+    const moduleFilename = module.filename.replace(/\\/g, '/');
+    let angularIndex = moduleFilename.indexOf('@angular');
     if (angularIndex >= 0)
-      this.angularPath = module.filename.substr(0, angularIndex).replace('/all/', '/all/@angular/');
-    let distIndex = module.filename.indexOf('/dist/all');
+      this.angularPath = moduleFilename.substr(0, angularIndex).replace('/all/', '/all/@angular/');
+    let distIndex = moduleFilename.indexOf('/dist/all');
     if (distIndex >= 0)
-      this.nodeModulesPath = path.join(module.filename.substr(0, distIndex), 'node_modules');
+      this.nodeModulesPath = path.join(moduleFilename.substr(0, distIndex), 'node_modules');
   }
 
   override(fileName: string, content: string) {

modules/@angular/language-service/test/ts_plugin_spec.ts

@@ -10,7 +10,7 @@ import 'reflect-metadata';
 
 import * as ts from 'typescript';
 
-import {LanguageServicePlugin} from '../src/ts_plugin';
+import {create} from '../src/ts_plugin';
 
 import {toh} from './test_data';
 import {MockTypescriptHost} from './test_utils';
@@ -21,6 +21,8 @@ describe('plugin', () => {
   let service = ts.createLanguageService(mockHost, documentRegistry);
   let program = service.getProgram();
 
+  const mockProject = {projectService: {logger: {info: function() {}}}};
+
   it('should not report errors on tour of heroes', () => {
     expectNoDiagnostics(service.getCompilerOptionsDiagnostics());
     for (let source of program.getSourceFiles()) {
@@ -29,13 +31,15 @@ describe('plugin', () => {
     }
   });
 
-  let plugin = new LanguageServicePlugin({host: mockHost, service, registry: documentRegistry});
+
+  let plugin = create(
+      {ts: ts, languageService: service, project: mockProject, languageServiceHost: mockHost});
 
   it('should not report template errors on tour of heroes', () => {
     for (let source of program.getSourceFiles()) {
       // Ignore all 'cases.ts' files as they intentionally contain errors.
       if (!source.fileName.endsWith('cases.ts')) {
-        expectNoDiagnostics(plugin.getSemanticDiagnosticsFilter(source.fileName, []));
+        expectNoDiagnostics(plugin.getSemanticDiagnostics(source.fileName));
       }
     }
   });
@@ -109,8 +113,6 @@ describe('plugin', () => {
   describe('with a *ngFor', () => {
     it('should include a let for empty attribute',
        () => { contains('app/parsing-cases.ts', 'for-empty', 'let'); });
-    it('should not suggest any entries if in the name part of a let',
-       () => { expectEmpty('app/parsing-cases.ts', 'for-let-empty'); });
     it('should suggest NgForRow members for let initialization expression', () => {
       contains(
           'app/parsing-cases.ts', 'for-let-i-equal', 'index', 'count', 'first', 'last', 'even',
@@ -206,31 +208,32 @@ describe('plugin', () => {
 
   function expectEmpty(fileName: string, locationMarker: string) {
     const location = getMarkerLocation(fileName, locationMarker);
-    expect(plugin.getCompletionsAtPosition(fileName, location).entries).toEqual([]);
+    expect(plugin.getCompletionsAtPosition(fileName, location).entries || []).toEqual([]);
   }
 
   function expectSemanticError(fileName: string, locationMarker: string, message: string) {
     const start = getMarkerLocation(fileName, locationMarker);
     const end = getMarkerLocation(fileName, locationMarker + '-end');
-    const errors = plugin.getSemanticDiagnosticsFilter(fileName, []);
+    const errors = plugin.getSemanticDiagnostics(fileName);
     for (const error of errors) {
       if (error.messageText.toString().indexOf(message) >= 0) {
         expect(error.start).toEqual(start);
         expect(error.length).toEqual(end - start);
         return;
       }
     }
-    throw new Error(
-        `Expected error messages to contain ${message}, in messages:\n  ${errors.map(e => e.messageText.toString()).join(',\n  ')}`);
+    throw new Error(`Expected error messages to contain ${message}, in messages:\n  ${errors
+                        .map(e => e.messageText.toString())
+                        .join(',\n  ')}`);
   }
 });
 
 
 function expectEntries(locationMarker: string, info: ts.CompletionInfo, ...names: string[]) {
   let entries: {[name: string]: boolean} = {};
   if (!info) {
-    throw new Error(
-        `Expected result from ${locationMarker} to include ${names.join(', ')} but no result provided`);
+    throw new Error(`Expected result from ${locationMarker} to include ${names.join(
+        ', ')} but no result provided`);
   } else {
     for (let entry of info.entries) {
       entries[entry.name] = true;
@@ -240,12 +243,15 @@ function expectEntries(locationMarker: string, info: ts.CompletionInfo, ...names
     let missing = shouldContains.filter(name => !entries[name]);
     let present = shouldNotContain.map(name => name.substr(1)).filter(name => entries[name]);
     if (missing.length) {
-      throw new Error(
-          `Expected result from ${locationMarker} to include at least one of the following, ${missing.join(', ')}, in the list of entries ${info.entries.map(entry => entry.name).join(', ')}`);
+      throw new Error(`Expected result from ${locationMarker
+          } to include at least one of the following, ${missing
+              .join(', ')}, in the list of entries ${info.entries.map(entry => entry.name)
+              .join(', ')}`);
     }
     if (present.length) {
-      throw new Error(
-          `Unexpected member${present.length > 1 ? 's': ''} included in result: ${present.join(', ')}`);
+      throw new Error(`Unexpected member${present.length > 1 ? 's' :
+                                                   ''
+                                                   } included in result: ${present.join(', ')}`);
     }
   }
 }