add expandable hover experimental setting

Author: gabritto

extensions/typescript-language-features/package.json

@@ -1495,6 +1495,15 @@
           "tags": [
             "experimental"
           ]
+        },
+        "typescript.experimental.expandableHover": {
+          "type": "boolean",
+          "default": false,
+          "description": "%configuration.expandableHover%",
+          "scope": "window",
+          "tags": [
+            "experimental"
+          ]
         }
       }
     },

extensions/typescript-language-features/package.nls.json

@@ -237,6 +237,7 @@
 	"configuration.tsserver.web.typeAcquisition.enabled": "Enable/disable package acquisition on the web. This enables IntelliSense for imported packages. Requires `#typescript.tsserver.web.projectWideIntellisense.enabled#`. Currently not supported for Safari.",
 	"configuration.tsserver.nodePath": "Run TS Server on a custom Node installation. This can be a path to a Node executable, or 'node' if you want VS Code to detect a Node installation.",
 	"configuration.updateImportsOnPaste": "Automatically update imports when pasting code. Requires TypeScript 5.6+.",
+	"configuration.expandableHover": "(Experimental) Enable/disable expanding on hover.",
 	"walkthroughs.nodejsWelcome.title": "Get started with JavaScript and Node.js",
 	"walkthroughs.nodejsWelcome.description": "Make the most of Visual Studio Code's first-class JavaScript experience.",
 	"walkthroughs.nodejsWelcome.downloadNode.forMacOrWindows.title": "Install Node.js",

extensions/typescript-language-features/src/languageFeatures/hover.ts

@@ -33,8 +33,9 @@ class TypeScriptHoverProvider implements vscode.HoverProvider {
 			return undefined;
 		}
 
+		const enableExpandableHover = vscode.workspace.getConfiguration('typescript').get('experimental.expandableHover');
 		let verbosityLevel: number | undefined;
-		if (this.client.apiVersion.gte(API.v570)) {
+		if (enableExpandableHover && this.client.apiVersion.gte(API.v570)) {
 			verbosityLevel = Math.max(0, this.getPreviousLevel(context?.previousHover) + (context?.verbosityDelta ?? 0));
 		}
 		const args = { ...typeConverters.Position.toFileLocationRequestArgs(filepath, position), verbosityLevel };