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import * as vscode from 'vscode';
import * as lc from 'vscode-languageclient';
import * as commands from './commands';
import { CargoWatchProvider } from './commands/cargo_watch';
import { ExpandMacroHoverProvider } from './commands/expand_macro';
import { HintsUpdater } from './commands/inlay_hints';
import {
interactivelyStartCargoWatch,
startCargoWatch
} from './commands/runnables';
import { SyntaxTreeContentProvider } from './commands/syntaxTree';
import * as events from './events';
import * as notifications from './notifications';
import { Server } from './server';
export function activate(context: vscode.ExtensionContext) {
function disposeOnDeactivation(disposable: vscode.Disposable) {
context.subscriptions.push(disposable);
}
function registerCommand(name: string, f: any) {
disposeOnDeactivation(vscode.commands.registerCommand(name, f));
}
function overrideCommand(
name: string,
f: (...args: any[]) => Promise<boolean>
) {
const defaultCmd = `default:${name}`;
const original = (...args: any[]) =>
vscode.commands.executeCommand(defaultCmd, ...args);
try {
registerCommand(name, async (...args: any[]) => {
const editor = vscode.window.activeTextEditor;
if (
!editor ||
!editor.document ||
editor.document.languageId !== 'rust'
) {
return await original(...args);
}
if (!(await f(...args))) {
return await original(...args);
}
});
} catch (_) {
vscode.window.showWarningMessage(
'Enhanced typing feature is disabled because of incompatibility with VIM extension, consider turning off rust-analyzer.enableEnhancedTyping: https://github.com/rust-analyzer/rust-analyzer/blob/master/docs/user/README.md#settings'
);
}
}
// Commands are requests from vscode to the language server
registerCommand(
'rust-analyzer.analyzerStatus',
commands.analyzerStatus.makeCommand(context)
);
registerCommand('rust-analyzer.collectGarbage', () =>
Server.client.sendRequest<null>('rust-analyzer/collectGarbage', null)
);
registerCommand(
'rust-analyzer.matchingBrace',
commands.matchingBrace.handle
);
registerCommand('rust-analyzer.joinLines', commands.joinLines.handle);
registerCommand('rust-analyzer.parentModule', commands.parentModule.handle);
registerCommand('rust-analyzer.run', commands.runnables.handle);
// Unlike the above this does not send requests to the language server
registerCommand('rust-analyzer.runSingle', commands.runnables.handleSingle);
registerCommand(
'rust-analyzer.applySourceChange',
commands.applySourceChange.handle
);
registerCommand(
'rust-analyzer.showReferences',
(uri: string, position: lc.Position, locations: lc.Location[]) => {
vscode.commands.executeCommand(
'editor.action.showReferences',
vscode.Uri.parse(uri),
Server.client.protocol2CodeConverter.asPosition(position),
locations.map(Server.client.protocol2CodeConverter.asLocation)
);
}
);
if (Server.config.enableEnhancedTyping) {
overrideCommand('type', commands.onEnter.handle);
}
// Notifications are events triggered by the language server
const allNotifications: Iterable<
[string, lc.GenericNotificationHandler]
> = [
[
'rust-analyzer/publishDecorations',
notifications.publishDecorations.handle
]
];
const syntaxTreeContentProvider = new SyntaxTreeContentProvider();
// The events below are plain old javascript events, triggered and handled by vscode
vscode.window.onDidChangeActiveTextEditor(
events.changeActiveTextEditor.makeHandler(syntaxTreeContentProvider)
);
disposeOnDeactivation(
vscode.workspace.registerTextDocumentContentProvider(
'rust-analyzer',
syntaxTreeContentProvider
)
);
registerCommand(
'rust-analyzer.syntaxTree',
commands.syntaxTree.createHandle(syntaxTreeContentProvider)
);
vscode.workspace.onDidChangeTextDocument(
events.changeTextDocument.createHandler(syntaxTreeContentProvider),
null,
context.subscriptions
);
const expandMacroContentProvider = new ExpandMacroHoverProvider();
disposeOnDeactivation(
vscode.languages.registerHoverProvider(
'rust',
expandMacroContentProvider
)
);
const startServer = () => Server.start(allNotifications);
const reloadCommand = () => reloadServer(startServer);
vscode.commands.registerCommand('rust-analyzer.reload', reloadCommand);
// Executing `cargo watch` provides us with inline diagnostics on save
let provider: CargoWatchProvider | undefined;
interactivelyStartCargoWatch(context).then(p => {
provider = p;
});
registerCommand('rust-analyzer.startCargoWatch', () => {
if (provider) {
provider.start();
} else {
startCargoWatch(context).then(p => {
provider = p;
});
}
});
registerCommand('rust-analyzer.stopCargoWatch', () => {
if (provider) {
provider.stop();
}
});
// Start the language server, finally!
startServer();
if (Server.config.displayInlayHints) {
const hintsUpdater = new HintsUpdater();
hintsUpdater.refreshHintsForVisibleEditors().then(() => {
// vscode may ignore top level hintsUpdater.refreshHintsForVisibleEditors()
// so update the hints once when the focus changes to guarantee their presence
let editorChangeDisposable: vscode.Disposable | null = null;
editorChangeDisposable = vscode.window.onDidChangeActiveTextEditor(
_ => {
if (editorChangeDisposable !== null) {
editorChangeDisposable.dispose();
}
return hintsUpdater.refreshHintsForVisibleEditors();
}
);
disposeOnDeactivation(
vscode.window.onDidChangeVisibleTextEditors(_ =>
hintsUpdater.refreshHintsForVisibleEditors()
)
);
disposeOnDeactivation(
vscode.workspace.onDidChangeTextDocument(e =>
hintsUpdater.refreshHintsForVisibleEditors(e)
)
);
disposeOnDeactivation(
vscode.workspace.onDidChangeConfiguration(_ =>
hintsUpdater.toggleHintsDisplay(
Server.config.displayInlayHints
)
)
);
});
}
}
export function deactivate(): Thenable<void> {
if (!Server.client) {
return Promise.resolve();
}
return Server.client.stop();
}
async function reloadServer(startServer: () => void) {
if (Server.client != null) {
vscode.window.showInformationMessage('Reloading rust-analyzer...');
await Server.client.stop();
startServer();
}
}
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