Refactor vscode extension

editors/code/src/server.ts

@@ -0,0 +1,74 @@
+import * as vscode from 'vscode';
+import * as lc from 'vscode-languageclient'
+
+import { Highlighter, Decoration } from './highlighting';
+
+export class Config {
+    highlightingOn = true;
+
+    constructor() {
+        vscode.workspace.onDidChangeConfiguration(_ => this.userConfigChanged());
+        this.userConfigChanged();
+    }
+
+    userConfigChanged() {
+        let config = vscode.workspace.getConfiguration('ra-lsp');
+        if (config.has('highlightingOn')) {
+            this.highlightingOn = config.get('highlightingOn') as boolean;
+        };
+
+        if (!this.highlightingOn) {
+            Server.highlighter.removeHighlights();
+        }
+    }
+}
+
+export class Server {
+    static highlighter = new Highlighter();
+    static config = new Config();
+    static client: lc.LanguageClient;
+
+
+    static start() {
+        let run: lc.Executable = {
+            command: "ra_lsp_server",
+            options: { cwd: "." }
+        }
+        let serverOptions: lc.ServerOptions = {
+            run,
+            debug: run
+        };
+
+        let clientOptions: lc.LanguageClientOptions = {
+            documentSelector: [{ scheme: 'file', language: 'rust' }],
+        };
+
+        Server.client = new lc.LanguageClient(
+            'ra-lsp',
+            'rust-analyzer languge server',
+            serverOptions,
+            clientOptions,
+        );
+        Server.client.onReady().then(() => {
+            Server.client.onNotification(
+                "m/publishDecorations",
+                (params: PublishDecorationsParams) => {
+                    let editor = vscode.window.visibleTextEditors.find(
+                        (editor) => editor.document.uri.toString() == params.uri
+                    )
+                    if (!Server.config.highlightingOn || !editor) return;
+                    Server.highlighter.setHighlights(
+                        editor,
+                        params.decorations,
+                    )
+                }
+            )
+        })
+        Server.client.start();
+    }
+}
+
+interface PublishDecorationsParams {
+    uri: string,
+    decorations: Decoration[],
+}