10 files changed, 47 insertions, 121 deletions

diff --git a/editors/code/src/commands/analyzer_status.ts b/editors/code/src/commands/analyzer_status.ts
index 6631e8db7..1c6ea399b 100644
--- a/editors/code/src/commands/analyzer_status.ts
+++ b/editors/code/src/commands/analyzer_status.ts
@@ -1,5 +1,6 @@
 import * as vscode from 'vscode';
 
+import * as ra from '../rust-analyzer-api';
 import { Ctx, Cmd } from '../ctx';
 
 // Shows status of rust-analyzer (for debugging)
@@ -50,10 +51,7 @@ class TextDocumentContentProvider
         const client = this.ctx.client;
         if (!editor || !client) return '';
 
-        return client.sendRequest<string>(
-            'rust-analyzer/analyzerStatus',
-            null,
-        );
+        return client.sendRequest(ra.analyzerStatus, null);
     }
 
     get onDidChange(): vscode.Event<vscode.Uri> {
diff --git a/editors/code/src/commands/expand_macro.ts b/editors/code/src/commands/expand_macro.ts
index edec9bbc1..23f2ef1d5 100644
--- a/editors/code/src/commands/expand_macro.ts
+++ b/editors/code/src/commands/expand_macro.ts
@@ -1,5 +1,5 @@
 import * as vscode from 'vscode';
-import * as lc from 'vscode-languageclient';
+import * as ra from '../rust-analyzer-api';
 
 import { Ctx, Cmd } from '../ctx';
 
@@ -26,12 +26,7 @@ export function expandMacro(ctx: Ctx): Cmd {
     };
 }
 
-interface ExpandedMacro {
-    name: string;
-    expansion: string;
-}
-
-function codeFormat(expanded: ExpandedMacro): string {
+function codeFormat(expanded: ra.ExpandedMacro): string {
     let result = `// Recursive expansion of ${expanded.name}! macro\n`;
     result += '// ' + '='.repeat(result.length - 3);
     result += '\n\n';
@@ -54,14 +49,11 @@ class TextDocumentContentProvider
         if (!editor || !client) return '';
 
         const position = editor.selection.active;
-        const request: lc.TextDocumentPositionParams = {
+
+        const expanded = await client.sendRequest(ra.expandMacro, {
             textDocument: { uri: editor.document.uri.toString() },
             position,
-        };
-        const expanded = await client.sendRequest<ExpandedMacro>(
-            'rust-analyzer/expandMacro',
-            request,
-        );
+        });
 
         if (expanded == null) return 'Not available';
 
diff --git a/editors/code/src/commands/index.ts b/editors/code/src/commands/index.ts
index 839245f48..bdb7fc3b0 100644
--- a/editors/code/src/commands/index.ts
+++ b/editors/code/src/commands/index.ts
@@ -1,5 +1,6 @@
 import * as vscode from 'vscode';
 import * as lc from 'vscode-languageclient';
+import * as ra from '../rust-analyzer-api';
 
 import { Ctx, Cmd } from '../ctx';
 import * as sourceChange from '../source_change';
@@ -16,9 +17,7 @@ export * from './ssr';
 export * from './server_version';
 
 export function collectGarbage(ctx: Ctx): Cmd {
-    return async () => {
-        await ctx.client?.sendRequest<null>('rust-analyzer/collectGarbage', null);
-    };
+    return async () => ctx.client.sendRequest(ra.collectGarbage, null);
 }
 
 export function showReferences(ctx: Ctx): Cmd {
@@ -36,13 +35,13 @@ export function showReferences(ctx: Ctx): Cmd {
 }
 
 export function applySourceChange(ctx: Ctx): Cmd {
-    return async (change: sourceChange.SourceChange) => {
+    return async (change: ra.SourceChange) => {
         await sourceChange.applySourceChange(ctx, change);
     };
 }
 
 export function selectAndApplySourceChange(ctx: Ctx): Cmd {
-    return async (changes: sourceChange.SourceChange[]) => {
+    return async (changes: ra.SourceChange[]) => {
         if (changes.length === 1) {
             await sourceChange.applySourceChange(ctx, changes[0]);
         } else if (changes.length > 0) {
diff --git a/editors/code/src/commands/join_lines.ts b/editors/code/src/commands/join_lines.ts
index 7b08c3255..de0614653 100644
--- a/editors/code/src/commands/join_lines.ts
+++ b/editors/code/src/commands/join_lines.ts
@@ -1,7 +1,7 @@
-import * as lc from 'vscode-languageclient';
+import * as ra from '../rust-analyzer-api';
 
 import { Ctx, Cmd } from '../ctx';
-import { applySourceChange, SourceChange } from '../source_change';
+import { applySourceChange } from '../source_change';
 
 export function joinLines(ctx: Ctx): Cmd {
     return async () => {
@@ -9,19 +9,10 @@ export function joinLines(ctx: Ctx): Cmd {
         const client = ctx.client;
         if (!editor || !client) return;
 
-        const request: JoinLinesParams = {
+        const change = await client.sendRequest(ra.joinLines, {
             range: client.code2ProtocolConverter.asRange(editor.selection),
             textDocument: { uri: editor.document.uri.toString() },
-        };
-        const change = await client.sendRequest<SourceChange>(
-            'rust-analyzer/joinLines',
-            request,
-        );
+        });
         await applySourceChange(ctx, change);
     };
 }
-
-interface JoinLinesParams {
-    textDocument: lc.TextDocumentIdentifier;
-    range: lc.Range;
-}
diff --git a/editors/code/src/commands/matching_brace.ts b/editors/code/src/commands/matching_brace.ts
index 7c58bb7e7..a60776e2d 100644
--- a/editors/code/src/commands/matching_brace.ts
+++ b/editors/code/src/commands/matching_brace.ts
@@ -1,5 +1,5 @@
 import * as vscode from 'vscode';
-import * as lc from 'vscode-languageclient';
+import * as ra from '../rust-analyzer-api';
 
 import { Ctx, Cmd } from '../ctx';
 
@@ -9,16 +9,12 @@ export function matchingBrace(ctx: Ctx): Cmd {
         const client = ctx.client;
         if (!editor || !client) return;
 
-        const request: FindMatchingBraceParams = {
+        const response = await client.sendRequest(ra.findMatchingBrace, {
             textDocument: { uri: editor.document.uri.toString() },
             offsets: editor.selections.map(s =>
                 client.code2ProtocolConverter.asPosition(s.active),
             ),
-        };
-        const response = await client.sendRequest<lc.Position[]>(
-            'rust-analyzer/findMatchingBrace',
-            request,
-        );
+        });
         editor.selections = editor.selections.map((sel, idx) => {
             const active = client.protocol2CodeConverter.asPosition(
                 response[idx],
@@ -29,8 +25,3 @@ export function matchingBrace(ctx: Ctx): Cmd {
         editor.revealRange(editor.selection);
     };
 }
-
-interface FindMatchingBraceParams {
-    textDocument: lc.TextDocumentIdentifier;
-    offsets: lc.Position[];
-}
diff --git a/editors/code/src/commands/on_enter.ts b/editors/code/src/commands/on_enter.ts
index 27ae8ec23..285849db7 100644
--- a/editors/code/src/commands/on_enter.ts
+++ b/editors/code/src/commands/on_enter.ts
@@ -1,7 +1,7 @@
 import * as vscode from 'vscode';
-import * as lc from 'vscode-languageclient';
+import * as ra from '../rust-analyzer-api';
 
-import { applySourceChange, SourceChange } from '../source_change';
+import { applySourceChange } from '../source_change';
 import { Cmd, Ctx } from '../ctx';
 
 async function handleKeypress(ctx: Ctx) {
@@ -10,22 +10,15 @@ async function handleKeypress(ctx: Ctx) {
 
     if (!editor || !client) return false;
 
-    const request: lc.TextDocumentPositionParams = {
+    const change = await client.sendRequest(ra.onEnter, {
         textDocument: { uri: editor.document.uri.toString() },
         position: client.code2ProtocolConverter.asPosition(
             editor.selection.active,
         ),
-    };
-    const change = await client.sendRequest<undefined | SourceChange>(
-        'rust-analyzer/onEnter',
-        request,
-    ).catch(
-        (_error: any) => {
-            // FIXME: switch to the more modern (?) typed request infrastructure
-            // client.logFailedRequest(OnEnterRequest.type, error);
-            return Promise.resolve(null);
-        }
-    );
+    }).catch(_error => {
+        // client.logFailedRequest(OnEnterRequest.type, error);
+        return null;
+    });
     if (!change) return false;
 
     await applySourceChange(ctx, change);
diff --git a/editors/code/src/commands/parent_module.ts b/editors/code/src/commands/parent_module.ts
index bf40b4021..8f78ddd71 100644
--- a/editors/code/src/commands/parent_module.ts
+++ b/editors/code/src/commands/parent_module.ts
@@ -1,5 +1,5 @@
 import * as vscode from 'vscode';
-import * as lc from 'vscode-languageclient';
+import * as ra from '../rust-analyzer-api';
 
 import { Ctx, Cmd } from '../ctx';
 
@@ -9,16 +9,12 @@ export function parentModule(ctx: Ctx): Cmd {
         const client = ctx.client;
         if (!editor || !client) return;
 
-        const request: lc.TextDocumentPositionParams = {
+        const response = await client.sendRequest(ra.parentModule, {
             textDocument: { uri: editor.document.uri.toString() },
             position: client.code2ProtocolConverter.asPosition(
                 editor.selection.active,
             ),
-        };
-        const response = await client.sendRequest<lc.Location[]>(
-            'rust-analyzer/parentModule',
-            request,
-        );
+        });
         const loc = response[0];
         if (loc == null) return;
 
diff --git a/editors/code/src/commands/runnables.ts b/editors/code/src/commands/runnables.ts
index 7919997ce..06b513466 100644
--- a/editors/code/src/commands/runnables.ts
+++ b/editors/code/src/commands/runnables.ts
@@ -1,5 +1,6 @@
 import * as vscode from 'vscode';
 import * as lc from 'vscode-languageclient';
+import * as ra from '../rust-analyzer-api';
 
 import { Ctx, Cmd } from '../ctx';
 
@@ -14,16 +15,13 @@ export function run(ctx: Ctx): Cmd {
         const textDocument: lc.TextDocumentIdentifier = {
             uri: editor.document.uri.toString(),
         };
-        const params: RunnablesParams = {
+
+        const runnables = await client.sendRequest(ra.runnables, {
             textDocument,
             position: client.code2ProtocolConverter.asPosition(
                 editor.selection.active,
             ),
-        };
-        const runnables = await client.sendRequest<Runnable[]>(
-            'rust-analyzer/runnables',
-            params,
-        );
+        });
         const items: RunnableQuickPick[] = [];
         if (prevRunnable) {
             items.push(prevRunnable);
@@ -48,7 +46,7 @@ export function run(ctx: Ctx): Cmd {
 }
 
 export function runSingle(ctx: Ctx): Cmd {
-    return async (runnable: Runnable) => {
+    return async (runnable: ra.Runnable) => {
         const editor = ctx.activeRustEditor;
         if (!editor) return;
 
@@ -64,26 +62,13 @@ export function runSingle(ctx: Ctx): Cmd {
     };
 }
 
-interface RunnablesParams {
-    textDocument: lc.TextDocumentIdentifier;
-    position?: lc.Position;
-}
-
-interface Runnable {
-    label: string;
-    bin: string;
-    args: string[];
-    env: { [index: string]: string };
-    cwd?: string;
-}
-
 class RunnableQuickPick implements vscode.QuickPickItem {
     public label: string;
     public description?: string | undefined;
     public detail?: string | undefined;
     public picked?: boolean | undefined;
 
-    constructor(public runnable: Runnable) {
+    constructor(public runnable: ra.Runnable) {
         this.label = runnable.label;
     }
 }
@@ -96,7 +81,7 @@ interface CargoTaskDefinition extends vscode.TaskDefinition {
     env?: { [key: string]: string };
 }
 
-function createTask(spec: Runnable): vscode.Task {
+function createTask(spec: ra.Runnable): vscode.Task {
     const TASK_SOURCE = 'Rust';
     const definition: CargoTaskDefinition = {
         type: 'cargo',
diff --git a/editors/code/src/commands/ssr.ts b/editors/code/src/commands/ssr.ts
index 9b814612a..eee48c693 100644
--- a/editors/code/src/commands/ssr.ts
+++ b/editors/code/src/commands/ssr.ts
@@ -1,6 +1,8 @@
-import { Ctx, Cmd } from '../ctx';
-import { applySourceChange, SourceChange } from '../source_change';
 import * as vscode from 'vscode';
+import * as ra from "../rust-analyzer-api";
+
+import { Ctx, Cmd } from '../ctx';
+import { applySourceChange } from '../source_change';
 
 export function ssr(ctx: Ctx): Cmd {
     return async () => {
@@ -21,16 +23,8 @@ export function ssr(ctx: Ctx): Cmd {
 
         if (!request) return;
 
-        const ssrRequest: SsrRequest = { arg: request };
-        const change = await client.sendRequest<SourceChange>(
-            'rust-analyzer/ssr',
-            ssrRequest,
-        );
+        const change = await client.sendRequest(ra.ssr, { arg: request });
 
         await applySourceChange(ctx, change);
     };
 }
-
-interface SsrRequest {
-    arg: string;
-}
diff --git a/editors/code/src/commands/syntax_tree.ts b/editors/code/src/commands/syntax_tree.ts
index 2887c96c8..7218bfb90 100644
--- a/editors/code/src/commands/syntax_tree.ts
+++ b/editors/code/src/commands/syntax_tree.ts
@@ -1,5 +1,5 @@
 import * as vscode from 'vscode';
-import * as lc from 'vscode-languageclient';
+import * as ra from '../rust-analyzer-api';
 
 import { Ctx, Cmd } from '../ctx';
 
@@ -61,13 +61,8 @@ function afterLs(f: () => void) {
     setTimeout(f, 10);
 }
 
-interface SyntaxTreeParams {
-    textDocument: lc.TextDocumentIdentifier;
-    range?: lc.Range;
-}
 
-class TextDocumentContentProvider
-    implements vscode.TextDocumentContentProvider {
+class TextDocumentContentProvider implements vscode.TextDocumentContentProvider {
     uri = vscode.Uri.parse('rust-analyzer://syntaxtree');
     eventEmitter = new vscode.EventEmitter<vscode.Uri>();
 
@@ -79,23 +74,15 @@ class TextDocumentContentProvider
         const client = this.ctx.client;
         if (!editor || !client) return '';
 
-        let range: lc.Range | undefined;
-
         // When the range based query is enabled we take the range of the selection
-        if (uri.query === 'range=true') {
-            range = editor.selection.isEmpty
-                ? undefined
-                : client.code2ProtocolConverter.asRange(editor.selection);
-        }
+        const range = uri.query === 'range=true' && !editor.selection.isEmpty
+            ? client.code2ProtocolConverter.asRange(editor.selection)
+            : null;
 
-        const request: SyntaxTreeParams = {
+        return client.sendRequest(ra.syntaxTree, {
             textDocument: { uri: editor.document.uri.toString() },
             range,
-        };
-        return client.sendRequest<string>(
-            'rust-analyzer/syntaxTree',
-            request,
-        );
+        });
     }
 
     get onDidChange(): vscode.Event<vscode.Uri> {