7 files changed, 110 insertions, 52 deletions

diff --git a/editors/code/package-lock.json b/editors/code/package-lock.json
index 982238fa4..806ebdb81 100644
--- a/editors/code/package-lock.json
+++ b/editors/code/package-lock.json
@@ -534,6 +534,12 @@
             "integrity": "sha1-elfrVQpng/kRUzH89GY9XI4AelA=",
             "dev": true
         },
+        "prettier": {
+            "version": "1.19.1",
+            "resolved": "https://registry.npmjs.org/prettier/-/prettier-1.19.1.tgz",
+            "integrity": "sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==",
+            "dev": true
+        },
         "read": {
             "version": "1.0.7",
             "resolved": "https://registry.npmjs.org/read/-/read-1.0.7.tgz",
diff --git a/editors/code/package.json b/editors/code/package.json
index d14a36f8c..6662747f6 100644
--- a/editors/code/package.json
+++ b/editors/code/package.json
@@ -18,7 +18,8 @@
     "scripts": {
         "vscode:prepublish": "rollup -c",
         "package": "vsce package",
-        "watch": "tsc -watch -p ./"
+        "watch": "tsc -watch -p ./",
+        "prettier": "prettier --write **/*.ts"
     },
     "dependencies": {
         "jsonc-parser": "^2.1.0",
@@ -26,16 +27,22 @@
         "vscode-languageclient": "^6.0.0-next.9"
     },
     "devDependencies": {
-        "rollup": "^1.27.14",
         "@rollup/plugin-commonjs": "^11.0.0",
         "@rollup/plugin-node-resolve": "^6.0.0",
         "@rollup/plugin-typescript": "^2.0.1",
-        "typescript": "^3.7.3",
-        "tslib": "^1.10.0",
-        "vsce": "^1.71.0",
         "@types/node": "^12.12.21",
         "@types/seedrandom": "^2.4.28",
-        "@types/vscode": "^1.41.0"
+        "@types/vscode": "^1.41.0",
+        "prettier": "^1.19.1",
+        "rollup": "^1.27.14",
+        "tslib": "^1.10.0",
+        "typescript": "^3.7.3",
+        "vsce": "^1.71.0"
+    },
+    "prettier": {
+        "singleQuote": true,
+        "tabWidth": 4,
+        "trailingComma": "all"
     },
     "activationEvents": [
         "onLanguage:rust",
diff --git a/editors/code/src/commands/analyzer_status.ts b/editors/code/src/commands/analyzer_status.ts
index 5840e8fc0..c9d32fe07 100644
--- a/editors/code/src/commands/analyzer_status.ts
+++ b/editors/code/src/commands/analyzer_status.ts
@@ -1,19 +1,19 @@
 import * as vscode from 'vscode';
-import { Server } from '../server';
+import { Ctx, Cmd } from '../ctx';
 // Shows status of rust-analyzer (for debugging)
 
-export function makeCommand(context: vscode.ExtensionContext) {
+export function analyzerStatus(ctx: Ctx): Cmd {
     let poller: NodeJS.Timer | null = null;
-    const tdcp = new TextDocumentContentProvider();
+    const tdcp = new TextDocumentContentProvider(ctx);
 
-    context.subscriptions.push(
+    ctx.pushCleanup(
         vscode.workspace.registerTextDocumentContentProvider(
             'rust-analyzer-status',
             tdcp,
         ),
     );
 
-    context.subscriptions.push({
+    ctx.pushCleanup({
         dispose() {
             if (poller != null) {
                 clearInterval(poller);
@@ -39,9 +39,16 @@ export function makeCommand(context: vscode.ExtensionContext) {
 
 class TextDocumentContentProvider
     implements vscode.TextDocumentContentProvider {
+
     uri = vscode.Uri.parse('rust-analyzer-status://status');
     eventEmitter = new vscode.EventEmitter<vscode.Uri>();
 
+    ctx: Ctx
+
+    constructor(ctx: Ctx) {
+        this.ctx = ctx
+    }
+
     provideTextDocumentContent(
         _uri: vscode.Uri,
     ): vscode.ProviderResult<string> {
@@ -49,7 +56,7 @@ class TextDocumentContentProvider
         if (editor == null) {
             return '';
         }
-        return Server.client.sendRequest<string>(
+        return this.ctx.client.sendRequest<string>(
             'rust-analyzer/analyzerStatus',
             null,
         );
diff --git a/editors/code/src/commands/index.ts b/editors/code/src/commands/index.ts
index 13a696758..9d9b9c575 100644
--- a/editors/code/src/commands/index.ts
+++ b/editors/code/src/commands/index.ts
@@ -1,14 +1,20 @@
-import * as analyzerStatus from './analyzer_status';
+import { Ctx, Cmd } from '../ctx'
+
+import { analyzerStatus } from './analyzer_status';
+import { matchingBrace } from './matching_brace';
 import * as applySourceChange from './apply_source_change';
 import * as expandMacro from './expand_macro';
 import * as inlayHints from './inlay_hints';
 import * as joinLines from './join_lines';
-import * as matchingBrace from './matching_brace';
 import * as onEnter from './on_enter';
 import * as parentModule from './parent_module';
 import * as runnables from './runnables';
 import * as syntaxTree from './syntaxTree';
 
+function collectGarbage(ctx: Ctx): Cmd {
+    return async () => { ctx.client.sendRequest<null>('rust-analyzer/collectGarbage', null) }
+}
+
 export {
     analyzerStatus,
     applySourceChange,
@@ -20,4 +26,5 @@ export {
     syntaxTree,
     onEnter,
     inlayHints,
+    collectGarbage
 };
diff --git a/editors/code/src/commands/matching_brace.ts b/editors/code/src/commands/matching_brace.ts
index 364208cc7..665b0c33c 100644
--- a/editors/code/src/commands/matching_brace.ts
+++ b/editors/code/src/commands/matching_brace.ts
@@ -1,34 +1,33 @@
 import * as vscode from 'vscode';
-
 import { Position, TextDocumentIdentifier } from 'vscode-languageclient';
-import { Server } from '../server';
+import { Ctx, Cmd } from '../ctx';
+
+export function matchingBrace(ctx: Ctx): Cmd {
+    return async () => {
+        const editor = ctx.activeRustEditor;
+        if (!editor) {
+            return;
+        }
+        const request: FindMatchingBraceParams = {
+            textDocument: { uri: editor.document.uri.toString() },
+            offsets: editor.selections.map(s => ctx.client.code2ProtocolConverter.asPosition(s.active)),
+        };
+        const response = await ctx.client.sendRequest<Position[]>(
+            'rust-analyzer/findMatchingBrace',
+            request,
+        );
+        editor.selections = editor.selections.map((sel, idx) => {
+            const active = ctx.client.protocol2CodeConverter.asPosition(
+                response[idx],
+            );
+            const anchor = sel.isEmpty ? active : sel.anchor;
+            return new vscode.Selection(anchor, active);
+        });
+        editor.revealRange(editor.selection);
+    }
+}
 
 interface FindMatchingBraceParams {
     textDocument: TextDocumentIdentifier;
     offsets: Position[];
 }
-
-export async function handle() {
-    const editor = vscode.window.activeTextEditor;
-    if (editor == null || editor.document.languageId !== 'rust') {
-        return;
-    }
-    const request: FindMatchingBraceParams = {
-        textDocument: { uri: editor.document.uri.toString() },
-        offsets: editor.selections.map(s => {
-            return Server.client.code2ProtocolConverter.asPosition(s.active);
-        }),
-    };
-    const response = await Server.client.sendRequest<Position[]>(
-        'rust-analyzer/findMatchingBrace',
-        request,
-    );
-    editor.selections = editor.selections.map((sel, idx) => {
-        const active = Server.client.protocol2CodeConverter.asPosition(
-            response[idx],
-        );
-        const anchor = sel.isEmpty ? active : sel.anchor;
-        return new vscode.Selection(anchor, active);
-    });
-    editor.revealRange(editor.selection);
-}
diff --git a/editors/code/src/ctx.ts b/editors/code/src/ctx.ts
new file mode 100644
index 000000000..712337fe7
--- /dev/null
+++ b/editors/code/src/ctx.ts
@@ -0,0 +1,35 @@
+import * as vscode from 'vscode';
+import * as lc from 'vscode-languageclient';
+import { Server } from './server';
+
+export class Ctx {
+    private extCtx: vscode.ExtensionContext;
+
+    constructor(extCtx: vscode.ExtensionContext) {
+        this.extCtx = extCtx;
+    }
+
+    get client(): lc.LanguageClient {
+        return Server.client;
+    }
+
+    get activeRustEditor(): vscode.TextEditor | undefined {
+        const editor = vscode.window.activeTextEditor;
+        return editor && editor.document.languageId === 'rust'
+            ? editor
+            : undefined;
+    }
+
+    registerCommand(name: string, factory: (ctx: Ctx) => Cmd) {
+        const fullName = `rust-analyzer.${name}`;
+        const cmd = factory(this);
+        const d = vscode.commands.registerCommand(fullName, cmd);
+        this.pushCleanup(d);
+    }
+
+    pushCleanup(d: { dispose(): any }) {
+        this.extCtx.subscriptions.push(d);
+    }
+}
+
+export type Cmd = (...args: any[]) => any;
diff --git a/editors/code/src/main.ts b/editors/code/src/main.ts
index 1da10ebd0..a4149a059 100644
--- a/editors/code/src/main.ts
+++ b/editors/code/src/main.ts
@@ -9,8 +9,16 @@ import { StatusDisplay } from './commands/watch_status';
 import * as events from './events';
 import * as notifications from './notifications';
 import { Server } from './server';
+import { Ctx } from './ctx';
+
+let ctx!: Ctx;
 
 export async function activate(context: vscode.ExtensionContext) {
+    ctx = new Ctx(context);
+    ctx.registerCommand('analyzerStatus', commands.analyzerStatus);
+    ctx.registerCommand('collectGarbage', commands.collectGarbage);
+    ctx.registerCommand('matchingBrace', commands.matchingBrace);
+
     function disposeOnDeactivation(disposable: vscode.Disposable) {
         context.subscriptions.push(disposable);
     }
@@ -48,17 +56,6 @@ export async function activate(context: vscode.ExtensionContext) {
     }
 
     // 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);