Privatize highlighting

editors/code/src/config.ts

@@ -1,7 +1,6 @@
 import * as vscode from 'vscode';
 import * as scopes from './scopes';
 import * as scopesMapper from './scopes_mapper';
-import { Server } from './server';
 
 const RA_LSP_DEBUG = process.env.__RA_LSP_SERVER_DEBUG;
 
@@ -56,8 +55,6 @@ export class Config {
     public userConfigChanged() {
         const config = vscode.workspace.getConfiguration('rust-analyzer');
 
-        Server.highlighter.removeHighlights();
-
         let requireReloadMessage = null;
 
         if (config.has('highlightingOn')) {

editors/code/src/ctx.ts

@@ -62,23 +62,30 @@ export class Ctx {
         this.extCtx.subscriptions.push(d);
     }
 
-    async sendRequestWithRetry<R>(method: string, param: any, token: vscode.CancellationToken): Promise<R> {
+    async sendRequestWithRetry<R>(
+        method: string,
+        param: any,
+        token: vscode.CancellationToken,
+    ): Promise<R> {
         await this.client.onReady();
         for (const delay of [2, 4, 6, 8, 10, null]) {
             try {
                 return await this.client.sendRequest(method, param, token);
             } catch (e) {
-                if (e.code === lc.ErrorCodes.ContentModified && delay !== null) {
-                    await sleep(10 * (1 << delay))
+                if (
+                    e.code === lc.ErrorCodes.ContentModified &&
+                    delay !== null
+                ) {
+                    await sleep(10 * (1 << delay));
                     continue;
                 }
                 throw e;
             }
         }
-        throw 'unreachable'
+        throw 'unreachable';
     }
 }
 
 export type Cmd = (...args: any[]) => any;
 
-const sleep = (ms: number) => new Promise(resolve => setTimeout(resolve, ms))
+const sleep = (ms: number) => new Promise(resolve => setTimeout(resolve, ms));

editors/code/src/highlighting.ts

@@ -10,6 +10,36 @@ import { Server } from './server';
 import { Ctx } from './ctx';
 
 export function activateHighlighting(ctx: Ctx) {
+    const highlighter = new Highlighter();
+
+    ctx.client.onReady().then(() => {
+        ctx.client.onNotification(
+            'rust-analyzer/publishDecorations',
+            (params: PublishDecorationsParams) => {
+                if (!ctx.config.highlightingOn) return;
+
+                const targetEditor = vscode.window.visibleTextEditors.find(
+                    editor => {
+                        const unescapedUri = unescape(
+                            editor.document.uri.toString(),
+                        );
+                        // Unescaped URI looks like:
+                        // file:///c:/Workspace/ra-test/src/main.rs
+                        return unescapedUri === params.uri;
+                    },
+                );
+                if (!targetEditor) return;
+
+                highlighter.setHighlights(targetEditor, params.decorations);
+            },
+        );
+    });
+
+    vscode.workspace.onDidChangeConfiguration(
+        _ => highlighter.removeHighlights(),
+        ctx.subscriptions,
+    );
+
     vscode.window.onDidChangeActiveTextEditor(
         async (editor: vscode.TextEditor | undefined) => {
             if (!editor || editor.document.languageId !== 'rust') return;
@@ -22,11 +52,17 @@ export function activateHighlighting(ctx: Ctx) {
                 'rust-analyzer/decorationsRequest',
                 params,
             );
-            Server.highlighter.setHighlights(editor, decorations);
+            highlighter.setHighlights(editor, decorations);
         },
+        ctx.subscriptions,
     );
 }
 
+interface PublishDecorationsParams {
+    uri: string;
+    decorations: Decoration[];
+}
+
 export interface Decoration {
     range: lc.Range;
     tag: string;
@@ -81,7 +117,7 @@ function createDecorationFromTextmate(
     return vscode.window.createTextEditorDecorationType(decorationOptions);
 }
 
-export class Highlighter {
+class Highlighter {
     private static initDecorations(): Map<
         string,
         vscode.TextEditorDecorationType

editors/code/src/inlay_hints.ts

@@ -102,7 +102,7 @@ class HintsUpdater {
         };
         let tokenSource = new vscode.CancellationTokenSource();
         let prev = this.pending.get(documentUri);
-        if (prev) prev.cancel()
+        if (prev) prev.cancel();
         this.pending.set(documentUri, tokenSource);
         try {
             return await this.ctx.sendRequestWithRetry<InlayHint[] | null>(
@@ -112,7 +112,7 @@ class HintsUpdater {
             );
         } finally {
             if (!tokenSource.token.isCancellationRequested) {
-                this.pending.delete(documentUri)
+                this.pending.delete(documentUri);
             }
         }
     }

editors/code/src/main.ts

@@ -4,7 +4,6 @@ import * as lc from 'vscode-languageclient';
 import * as commands from './commands';
 import { activateInlayHints } from './inlay_hints';
 import { StatusDisplay } from './status_display';
-import * as notifications from './notifications';
 import { Server } from './server';
 import { Ctx } from './ctx';
 import { activateHighlighting } from './highlighting';
@@ -35,14 +34,8 @@ export async function activate(context: vscode.ExtensionContext) {
     const watchStatus = new StatusDisplay(ctx.config.cargoWatchOptions.command);
     ctx.pushCleanup(watchStatus);
 
-    activateHighlighting(ctx);
-
     // Notifications are events triggered by the language server
     const allNotifications: [string, lc.GenericNotificationHandler][] = [
-        [
-            'rust-analyzer/publishDecorations',
-            notifications.publishDecorations.handle,
-        ],
         [
             '$/progress',
             params => watchStatus.handleProgressNotification(params),
@@ -61,6 +54,8 @@ export async function activate(context: vscode.ExtensionContext) {
         vscode.window.showErrorMessage(e.message);
     }
 
+    activateHighlighting(ctx);
+
     if (ctx.config.displayInlayHints) {
         activateInlayHints(ctx);
     }

editors/code/src/notifications/index.ts

@@ -1,3 +0,0 @@
-import * as publishDecorations from './publish_decorations';
-
-export { publishDecorations };

editors/code/src/notifications/publish_decorations.ts

@@ -1,24 +0,0 @@
-import * as vscode from 'vscode';
-
-import { Decoration } from '../highlighting';
-import { Server } from '../server';
-
-export interface PublishDecorationsParams {
-    uri: string;
-    decorations: Decoration[];
-}
-
-export function handle(params: PublishDecorationsParams) {
-    const targetEditor = vscode.window.visibleTextEditors.find(editor => {
-        const unescapedUri = unescape(editor.document.uri.toString());
-        // Unescaped URI looks like:
-        // file:///c:/Workspace/ra-test/src/main.rs
-        return unescapedUri === params.uri;
-    });
-
-    if (!Server.config.highlightingOn || !targetEditor) {
-        return;
-    }
-
-    Server.highlighter.setHighlights(targetEditor, params.decorations);
-}

editors/code/src/server.ts

@@ -3,7 +3,6 @@ import * as lc from 'vscode-languageclient';
 
 import { window, workspace } from 'vscode';
 import { Config } from './config';
-import { Highlighter } from './highlighting';
 
 function expandPathResolving(path: string) {
     if (path.startsWith('~/')) {
@@ -13,7 +12,6 @@ function expandPathResolving(path: string) {
 }
 
 export class Server {
-    public static highlighter = new Highlighter();
     public static config = new Config();
     public static client: lc.LanguageClient;