93 lines
2.7 KiB
TypeScript
93 lines
2.7 KiB
TypeScript
import * as vscode from 'vscode';
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import * as ra from '../rust-analyzer-api';
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import { Ctx, Cmd } from '../ctx';
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import { isRustDocument } from '../util';
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// Opens the virtual file that will show the syntax tree
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//
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// The contents of the file come from the `TextDocumentContentProvider`
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export function syntaxTree(ctx: Ctx): Cmd {
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const tdcp = new TextDocumentContentProvider(ctx);
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ctx.pushCleanup(
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vscode.workspace.registerTextDocumentContentProvider(
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'rust-analyzer',
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tdcp,
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),
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);
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vscode.workspace.onDidChangeTextDocument(
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(event: vscode.TextDocumentChangeEvent) => {
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const doc = event.document;
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if (!isRustDocument(doc)) return;
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afterLs(() => tdcp.eventEmitter.fire(tdcp.uri));
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},
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null,
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ctx.subscriptions,
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);
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vscode.window.onDidChangeActiveTextEditor(
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(editor: vscode.TextEditor | undefined) => {
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if (!editor || !isRustDocument(editor.document)) return;
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tdcp.eventEmitter.fire(tdcp.uri);
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},
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null,
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ctx.subscriptions,
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);
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return async () => {
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const editor = vscode.window.activeTextEditor;
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const rangeEnabled = !!(editor && !editor.selection.isEmpty);
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const uri = rangeEnabled
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? vscode.Uri.parse(`${tdcp.uri.toString()}?range=true`)
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: tdcp.uri;
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const document = await vscode.workspace.openTextDocument(uri);
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tdcp.eventEmitter.fire(uri);
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return vscode.window.showTextDocument(
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document,
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vscode.ViewColumn.Two,
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true,
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);
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};
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}
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// We need to order this after LS updates, but there's no API for that.
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// Hence, good old setTimeout.
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function afterLs(f: () => void) {
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setTimeout(f, 10);
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}
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class TextDocumentContentProvider implements vscode.TextDocumentContentProvider {
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uri = vscode.Uri.parse('rust-analyzer://syntaxtree');
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eventEmitter = new vscode.EventEmitter<vscode.Uri>();
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constructor(private readonly ctx: Ctx) {
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}
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provideTextDocumentContent(uri: vscode.Uri): vscode.ProviderResult<string> {
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const editor = vscode.window.activeTextEditor;
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const client = this.ctx.client;
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if (!editor || !client) return '';
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// When the range based query is enabled we take the range of the selection
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const range = uri.query === 'range=true' && !editor.selection.isEmpty
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? client.code2ProtocolConverter.asRange(editor.selection)
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: null;
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return client.sendRequest(ra.syntaxTree, {
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textDocument: { uri: editor.document.uri.toString() },
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range,
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});
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}
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get onDidChange(): vscode.Event<vscode.Uri> {
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return this.eventEmitter.event;
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}
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}
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