84 lines
2.9 KiB
TypeScript
84 lines
2.9 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 * as ts from 'typescript/lib/tsserverlibrary';
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import {LanguageService} from '../../language_service';
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import {extractCursorInfo} from './util';
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/**
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* A file that is currently open in the `ts.Project`, with a cursor position.
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*/
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export class OpenBuffer {
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private _cursor: number = 0;
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constructor(
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private ngLS: LanguageService, private projectFileName: string,
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private scriptInfo: ts.server.ScriptInfo) {}
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get cursor(): number {
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return this._cursor;
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}
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get contents(): string {
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const snapshot = this.scriptInfo.getSnapshot();
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return snapshot.getText(0, snapshot.getLength());
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}
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set contents(newContents: string) {
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const snapshot = this.scriptInfo.getSnapshot();
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this.scriptInfo.editContent(0, snapshot.getLength(), newContents);
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// If the cursor goes beyond the new length of the buffer, clamp it to the end of the buffer.
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if (this._cursor > newContents.length) {
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this._cursor = newContents.length;
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}
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}
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/**
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* Find a snippet of text within the given buffer and position the cursor within it.
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*
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* @param snippetWithCursor a snippet of text which contains the '¦' symbol, representing where
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* the cursor should be placed within the snippet when located in the larger buffer.
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*/
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moveCursorToText(snippetWithCursor: string): void {
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const {text: snippet, cursor} = extractCursorInfo(snippetWithCursor);
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const snippetIndex = this.contents.indexOf(snippet);
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if (snippetIndex === -1) {
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throw new Error(`Snippet '${snippet}' not found in ${this.projectFileName}`);
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}
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if (this.contents.indexOf(snippet, snippetIndex + 1) !== -1) {
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throw new Error(`Snippet '${snippet}' is not unique within ${this.projectFileName}`);
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}
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this._cursor = snippetIndex + cursor;
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}
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/**
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* Execute the `getDefinitionAndBoundSpan` operation in the Language Service at the cursor
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* location in this buffer.
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*/
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getDefinitionAndBoundSpan(): ts.DefinitionInfoAndBoundSpan|undefined {
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return this.ngLS.getDefinitionAndBoundSpan(this.scriptInfo.fileName, this._cursor);
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}
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getCompletionsAtPosition(options?: ts.GetCompletionsAtPositionOptions):
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ts.WithMetadata<ts.CompletionInfo>|undefined {
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return this.ngLS.getCompletionsAtPosition(this.scriptInfo.fileName, this._cursor, options);
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}
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getCompletionEntryDetails(
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entryName: string, formatOptions?: ts.FormatCodeOptions|ts.FormatCodeSettings,
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preferences?: ts.UserPreferences): ts.CompletionEntryDetails|undefined {
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return this.ngLS.getCompletionEntryDetails(
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this.scriptInfo.fileName, this._cursor, entryName, formatOptions, preferences);
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}
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getTcb() {
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return this.ngLS.getTcb(this.scriptInfo.fileName, this._cursor);
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}
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}
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