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'use strict';
import * as vscode from 'vscode';
import {
LanguageClient,
LanguageClientOptions,
ServerOptions,
TransportKind,
Executable,
TextDocumentIdentifier,
Range
} from 'vscode-languageclient';
let client: LanguageClient;
let uris = {
syntaxTree: vscode.Uri.parse('libsyntax-rust://syntaxtree')
}
export function activate(context: vscode.ExtensionContext) {
let textDocumentContentProvider = new TextDocumentContentProvider()
let dispose = (disposable) => {
context.subscriptions.push(disposable);
}
let registerCommand = (name, f) => {
dispose(vscode.commands.registerCommand(name, f))
}
registerCommand('libsyntax-rust.syntaxTree', () => openDoc(uris.syntaxTree))
registerCommand('libsyntax-rust.extendSelection', async () => {
let editor = vscode.window.activeTextEditor
if (editor == null || editor.document.languageId != "rust") return
let request: ExtendSelectionParams = {
textDocument: { uri: editor.document.uri.toString() },
selections: editor.selections.map((s) => {
let r: Range = { start: s.start, end: s.end }
return r;
})
}
let response = await client.sendRequest<ExtendSelectionResult>("m/extendSelection", request)
editor.selections = response.selections.map((range) => {
return new vscode.Selection(
new vscode.Position(range.start.line, range.start.character),
new vscode.Position(range.end.line, range.end.character),
)
})
})
dispose(vscode.workspace.registerTextDocumentContentProvider(
'libsyntax-rust',
textDocumentContentProvider
))
startServer()
vscode.workspace.onDidChangeTextDocument((event: vscode.TextDocumentChangeEvent) => {
let doc = event.document
if (doc.languageId != "rust") return
// We need to order this after LS updates, but there's no API for that.
// Hence, good old setTimeout.
setTimeout(() => {
textDocumentContentProvider.eventEmitter.fire(uris.syntaxTree)
}, 10)
}, null, context.subscriptions)
}
export function deactivate(): Thenable<void> {
if (!client) {
return undefined;
}
return client.stop();
}
function startServer() {
let run: Executable = {
command: "cargo",
args: ["run", "--package", "m"],
options: { cwd: "." }
}
let serverOptions: ServerOptions = {
run,
debug: run
};
let clientOptions: LanguageClientOptions = {
documentSelector: [{ scheme: 'file', language: 'rust' }],
};
client = new LanguageClient(
'm',
'm languge server',
serverOptions,
clientOptions,
);
client.start();
}
async function openDoc(uri: vscode.Uri) {
let document = await vscode.workspace.openTextDocument(uri)
return vscode.window.showTextDocument(document, vscode.ViewColumn.Two, true)
}
class TextDocumentContentProvider implements vscode.TextDocumentContentProvider {
public eventEmitter = new vscode.EventEmitter<vscode.Uri>()
public syntaxTree: string = "Not available"
public provideTextDocumentContent(uri: vscode.Uri): vscode.ProviderResult<string> {
let editor = vscode.window.activeTextEditor;
if (editor == null) return ""
let request: SyntaxTreeParams = {
textDocument: { uri: editor.document.uri.toString() }
};
return client.sendRequest<SyntaxTreeResult>("m/syntaxTree", request);
}
get onDidChange(): vscode.Event<vscode.Uri> {
return this.eventEmitter.event
}
}
interface SyntaxTreeParams {
textDocument: TextDocumentIdentifier;
}
type SyntaxTreeResult = string
interface ExtendSelectionParams {
textDocument: TextDocumentIdentifier;
selections: Range[];
}
interface ExtendSelectionResult {
selections: Range[];
}
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