1 files changed, 167 insertions, 0 deletions
diff --git a/tools/language-server/src/plugins/interfaces.ts b/tools/language-server/src/plugins/interfaces.ts
new file mode 100644
index 000000000..b68100de1
--- /dev/null
+++ b/tools/language-server/src/plugins/interfaces.ts
@@ -0,0 +1,167 @@
+import { CompletionContext, FileChangeType, LinkedEditingRanges, SemanticTokens, SignatureHelpContext, TextDocumentContentChangeEvent } from 'vscode-languageserver';
+import {
+  CodeAction,
+  CodeActionContext,
+  Color,
+  ColorInformation,
+  ColorPresentation,
+  CompletionItem,
+  CompletionList,
+  DefinitionLink,
+  Diagnostic,
+  FormattingOptions,
+  Hover,
+  Location,
+  Position,
+  Range,
+  ReferenceContext,
+  SymbolInformation,
+  TextDocumentIdentifier,
+  TextEdit,
+  WorkspaceEdit,
+  SelectionRange,
+  SignatureHelp,
+  FoldingRange,
+} from 'vscode-languageserver-types';
+import { Document } from '../core/documents';
+
+export type Resolvable<T> = T | Promise<T>;
+
+export interface AppCompletionItem<T extends TextDocumentIdentifier = any> extends CompletionItem {
+  data?: T;
+}
+
+export interface AppCompletionList<T extends TextDocumentIdentifier = any> extends CompletionList {
+  items: Array<AppCompletionItem<T>>;
+}
+
+export interface DiagnosticsProvider {
+  getDiagnostics(document: Document): Resolvable<Diagnostic[]>;
+}
+
+export interface HoverProvider {
+  doHover(document: Document, position: Position): Resolvable<Hover | null>;
+}
+
+export interface FoldingRangeProvider {
+  getFoldingRanges(document: Document): Resolvable<FoldingRange[] | null>;
+}
+
+export interface CompletionsProvider<T extends TextDocumentIdentifier = any> {
+  getCompletions(document: Document, position: Position, completionContext?: CompletionContext): Resolvable<AppCompletionList<T> | null>;
+
+  resolveCompletion?(document: Document, completionItem: AppCompletionItem<T>): Resolvable<AppCompletionItem<T>>;
+}
+
+export interface FormattingProvider {
+  formatDocument(document: Document, options: FormattingOptions): Resolvable<TextEdit[]>;
+}
+
+export interface TagCompleteProvider {
+  doTagComplete(document: Document, position: Position): Resolvable<string | null>;
+}
+
+export interface DocumentColorsProvider {
+  getDocumentColors(document: Document): Resolvable<ColorInformation[]>;
+}
+
+export interface ColorPresentationsProvider {
+  getColorPresentations(document: Document, range: Range, color: Color): Resolvable<ColorPresentation[]>;
+}
+
+export interface DocumentSymbolsProvider {
+  getDocumentSymbols(document: Document): Resolvable<SymbolInformation[]>;
+}
+
+export interface DefinitionsProvider {
+  getDefinitions(document: Document, position: Position): Resolvable<DefinitionLink[]>;
+}
+
+export interface BackwardsCompatibleDefinitionsProvider {
+  getDefinitions(document: Document, position: Position): Resolvable<DefinitionLink[] | Location[]>;
+}
+
+export interface CodeActionsProvider {
+  getCodeActions(document: Document, range: Range, context: CodeActionContext): Resolvable<CodeAction[]>;
+  executeCommand?(document: Document, command: string, args?: any[]): Resolvable<WorkspaceEdit | string | null>;
+}
+
+export interface FileRename {
+  oldUri: string;
+  newUri: string;
+}
+
+export interface UpdateImportsProvider {
+  updateImports(fileRename: FileRename): Resolvable<WorkspaceEdit | null>;
+}
+
+export interface RenameProvider {
+  rename(document: Document, position: Position, newName: string): Resolvable<WorkspaceEdit | null>;
+  prepareRename(document: Document, position: Position): Resolvable<Range | null>;
+}
+
+export interface FindReferencesProvider {
+  findReferences(document: Document, position: Position, context: ReferenceContext): Promise<Location[] | null>;
+}
+
+export interface SignatureHelpProvider {
+  getSignatureHelp(document: Document, position: Position, context: SignatureHelpContext | undefined): Resolvable<SignatureHelp | null>;
+}
+
+export interface SelectionRangeProvider {
+  getSelectionRange(document: Document, position: Position): Resolvable<SelectionRange | null>;
+}
+
+export interface SemanticTokensProvider {
+  getSemanticTokens(textDocument: Document, range?: Range): Resolvable<SemanticTokens | null>;
+}
+
+export interface LinkedEditingRangesProvider {
+  getLinkedEditingRanges(document: Document, position: Position): Resolvable<LinkedEditingRanges | null>;
+}
+
+export interface OnWatchFileChangesPara {
+  fileName: string;
+  changeType: FileChangeType;
+}
+
+export interface OnWatchFileChanges {
+  onWatchFileChanges(onWatchFileChangesParas: OnWatchFileChangesPara[]): void;
+}
+
+export interface UpdateTsOrJsFile {
+  updateTsOrJsFile(fileName: string, changes: TextDocumentContentChangeEvent[]): void;
+}
+
+type ProviderBase = DiagnosticsProvider &
+  HoverProvider &
+  CompletionsProvider &
+  FormattingProvider &
+  FoldingRangeProvider &
+  TagCompleteProvider &
+  DocumentColorsProvider &
+  ColorPresentationsProvider &
+  DocumentSymbolsProvider &
+  UpdateImportsProvider &
+  CodeActionsProvider &
+  FindReferencesProvider &
+  RenameProvider &
+  SignatureHelpProvider &
+  SemanticTokensProvider &
+  LinkedEditingRangesProvider;
+
+export type LSProvider = ProviderBase & BackwardsCompatibleDefinitionsProvider;
+
+export interface LSPProviderConfig {
+  /**
+   * Whether or not completion lists that are marked as imcomplete
+   * should be filtered server side.
+   */
+  filterIncompleteCompletions: boolean;
+  /**
+   * Whether or not getDefinitions supports the LocationLink interface.
+   */
+  definitionLinkSupport: boolean;
+}
+
+export type Plugin = Partial<ProviderBase & DefinitionsProvider & OnWatchFileChanges & SelectionRangeProvider & UpdateTsOrJsFile>;