feat(lsp): add xgoGetProperties command for lsp

spx-gui/src/components/editor/code-editor/lsp/index.ts

@@ -18,7 +18,7 @@ import {
 } from '../common'
 import { XGoLanguageClient, type IConnection, ResponseError } from './spxls/client'
 import type { Files as SpxlsFiles, RequestMessage, ResponseMessage, NotificationMessage } from './spxls'
-import { xgoGetInputSlots, xgoRenameResources } from './spxls/commands'
+import { xgoGetInputSlots, xgoGetProperties, xgoRenameResources } from './spxls/commands'
 import {
   type CompletionItem,
   isDocumentLinkForResourceReference,
@@ -254,6 +254,17 @@ export class SpxLSPClient extends Disposable {
     )
   }
 
+  async workspaceExecuteCommandXGoGetProperties(
+    ctx: RequestContext,
+    ...params: xgoGetProperties.Arguments
+  ): Promise<xgoGetProperties.Result> {
+    return this.executeCommand<xgoGetProperties.Arguments, xgoGetProperties.Result>(
+      ctx,
+      xgoGetProperties.command,
+      ...params
+    )
+  }
+
   async textDocumentDocumentLink(
     ctx: RequestContext,
     params: lsp.DocumentLinkParams

spx-gui/src/components/editor/code-editor/lsp/spxls/commands.ts

@@ -30,3 +30,24 @@ export namespace xgoGetInputSlots {
   }
   export type Result = XGoInputSlot[] | null
 }
+
+export namespace xgoGetProperties {
+  export const command = 'xgo.getProperties'
+  type XGoGetPropertiesParams = {
+    /** The target name, for example `Game` or a specific sprite name. */
+    target: string
+  }
+  export type Arguments = [XGoGetPropertiesParams]
+  /** A property of a target type. */
+  export type XGoProperty = {
+    /** The property name. */
+    name: string
+    /** The property type as a string. */
+    type: string
+    /** The kind of property. */
+    kind: 'field' | 'method'
+    /** Optional documentation for the property. */
+    doc?: string
+  }
+  export type Result = XGoProperty[]
+}