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'use strict';
import * as vscode from 'vscode';
import * as lc from 'vscode-languageclient'
let client: lc.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) => {
return client.code2ProtocolConverter.asRange(s)
})
}
let response = await client.sendRequest<ExtendSelectionResult>("m/extendSelection", request)
editor.selections = response.selections.map((range) => {
let r = client.protocol2CodeConverter.asRange(range)
return new vscode.Selection(r.start, r.end)
})
})
registerCommand('libsyntax-rust.matchingBrace', async () => {
let editor = vscode.window.activeTextEditor
if (editor == null || editor.document.languageId != "rust") return
let request: FindMatchingBraceParams = {
textDocument: { uri: editor.document.uri.toString() },
offsets: editor.selections.map((s) => {
return client.code2ProtocolConverter.asPosition(s.active)
})
}
let response = await client.sendRequest<lc.Position[]>("m/findMatchingBrace", request)
editor.selections = editor.selections.map((sel, idx) => {
let active = client.protocol2CodeConverter.asPosition(response[idx])
let anchor = sel.isEmpty ? active : sel.anchor
return new vscode.Selection(anchor, active)
})
})
dispose(vscode.workspace.registerTextDocumentContentProvider(
'libsyntax-rust',
textDocumentContentProvider
))
startServer()
vscode.workspace.onDidChangeTextDocument((event: vscode.TextDocumentChangeEvent) => {
let doc = event.document
if (doc.languageId != "rust") return
afterLs(() => {
textDocumentContentProvider.eventEmitter.fire(uris.syntaxTree)
})
}, null, context.subscriptions)
}
// We need to order this after LS updates, but there's no API for that.
// Hence, good old setTimeout.
function afterLs(f) {
setTimeout(f, 10)
}
export function deactivate(): Thenable<void> {
if (!client) {
return undefined;
}
return client.stop();
}
function startServer() {
let run: lc.Executable = {
// command: "cargo",
// args: ["run", "--package", "m"],
command: "m",
options: { cwd: "." }
}
let serverOptions: lc.ServerOptions = {
run,
debug: run
};
let clientOptions: lc.LanguageClientOptions = {
documentSelector: [{ scheme: 'file', language: 'rust' }],
};
client = new lc.LanguageClient(
'm',
'm languge server',
serverOptions,
clientOptions,
);
client.onReady().then(() => {
client.onNotification(
new lc.NotificationType("m/publishDecorations"),
(params: PublishDecorationsParams) => {
let editor = vscode.window.visibleTextEditors.find(
(editor) => editor.document.uri.toString() == params.uri
)
if (editor == null) return;
setHighlights(
editor,
params.decorations,
)
}
)
client.onRequest(
new lc.RequestType<lc.Position, void, any, any>("m/moveCursor"),
(params: lc.Position, token: lc.CancellationToken) => {
let editor = vscode.window.activeTextEditor;
if (editor == null) return
if (!editor.selection.isEmpty) return
let position = client.protocol2CodeConverter.asPosition(params)
afterLs(() => {
editor.selection = new vscode.Selection(position, position)
})
}
)
})
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
}
}
const decorations = (() => {
const decor = (obj) => vscode.window.createTextEditorDecorationType({ color: obj })
return {
background: decor("#3F3F3F"),
error: vscode.window.createTextEditorDecorationType({
borderColor: "red",
borderStyle: "none none dashed none",
}),
comment: decor("#7F9F7F"),
string: decor("#CC9393"),
keyword: decor("#F0DFAF"),
function: decor("#93E0E3"),
parameter: decor("#94BFF3"),
builtin: decor("#DD6718"),
text: decor("#DCDCCC"),
attribute: decor("#BFEBBF"),
literal: decor("#DFAF8F"),
}
})()
function setHighlights(
editor: vscode.TextEditor,
highlihgs: Array<Decoration>
) {
let byTag = {}
for (let tag in decorations) {
byTag[tag] = []
}
for (let d of highlihgs) {
if (!byTag[d.tag]) {
console.log(`unknown tag ${d.tag}`)
continue
}
byTag[d.tag].push(
client.protocol2CodeConverter.asRange(d.range)
)
}
for (let tag in byTag) {
let dec = decorations[tag]
let ranges = byTag[tag]
editor.setDecorations(dec, ranges)
}
}
interface SyntaxTreeParams {
textDocument: lc.TextDocumentIdentifier;
}
type SyntaxTreeResult = string
interface ExtendSelectionParams {
textDocument: lc.TextDocumentIdentifier;
selections: lc.Range[];
}
interface ExtendSelectionResult {
selections: lc.Range[];
}
interface FindMatchingBraceParams {
textDocument: lc.TextDocumentIdentifier;
offsets: lc.Position[];
}
interface PublishDecorationsParams {
uri: string,
decorations: Decoration[],
}
interface Decoration {
range: lc.Range,
tag: string,
}
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