Merge #3099

3099: Init implementation of structural search replace r=matklad a=mikhail-m1

next steps:
* ignore space and other minor difference
* add support to ra_cli
* call rust parser to check pattern
* documentation

original issue #2267 

Co-authored-by: Mikhail Modin <[email protected]>

4 files changed, 43 insertions, 0 deletions

diff --git a/editors/code/package.json b/editors/code/package.json
index 46acbfe76..774fed21d 100644
--- a/editors/code/package.json
+++ b/editors/code/package.json
@@ -124,6 +124,11 @@
                 "command": "rust-analyzer.onEnter",
                 "title": "Enhanced enter key",
                 "category": "Rust Analyzer"
+            },
+            {
+                "command": "rust-analyzer.ssr",
+                "title": "Structural Search Replace",
+                "category": "Rust Analyzer"
             }
         ],
         "keybindings": [
diff --git a/editors/code/src/commands/index.ts b/editors/code/src/commands/index.ts
index aee969432..b5ebec117 100644
--- a/editors/code/src/commands/index.ts
+++ b/editors/code/src/commands/index.ts
@@ -12,6 +12,7 @@ export * from './parent_module';
 export * from './syntax_tree';
 export * from './expand_macro';
 export * from './runnables';
+export * from './ssr';
 
 export function collectGarbage(ctx: Ctx): Cmd {
     return async () => {
diff --git a/editors/code/src/commands/ssr.ts b/editors/code/src/commands/ssr.ts
new file mode 100644
index 000000000..6287bf47b
--- /dev/null
+++ b/editors/code/src/commands/ssr.ts
@@ -0,0 +1,36 @@
+import { Ctx, Cmd } from '../ctx';
+import { applySourceChange, SourceChange } from '../source_change';
+import * as vscode from 'vscode';
+
+export function ssr(ctx: Ctx): Cmd {
+    return async () => {
+        const client = ctx.client;
+        if (!client) return;
+
+        const options: vscode.InputBoxOptions = {
+            placeHolder: "foo($a:expr, $b:expr) ==>> bar($a, foo($b))",
+            prompt: "Enter request",
+            validateInput: (x: string) => {
+                if (x.includes('==>>')) {
+                    return null;
+                }
+                return "Enter request: pattern ==>> template"
+            }
+        }
+        const request = await vscode.window.showInputBox(options);
+
+        if (!request) return;
+
+        const ssrRequest: SsrRequest = { arg: request };
+        const change = await client.sendRequest<SourceChange>(
+            'rust-analyzer/ssr',
+            ssrRequest,
+        );
+
+        await applySourceChange(ctx, change);
+    };
+}
+
+interface SsrRequest {
+    arg: string;
+}
diff --git a/editors/code/src/main.ts b/editors/code/src/main.ts
index 5efce41f4..5a99e96f0 100644
--- a/editors/code/src/main.ts
+++ b/editors/code/src/main.ts
@@ -22,6 +22,7 @@ export async function activate(context: vscode.ExtensionContext) {
     ctx.registerCommand('run', commands.run);
     ctx.registerCommand('reload', commands.reload);
     ctx.registerCommand('onEnter', commands.onEnter);
+    ctx.registerCommand('ssr', commands.ssr)
 
     // Internal commands which are invoked by the server.
     ctx.registerCommand('runSingle', commands.runSingle);