Add path-related commands and update selection handling

src/commands/set-path-authored-state-command.ts

@@ -0,0 +1,90 @@
+import { createOpaqueId } from "../core/ids";
+import { cloneScenePath } from "../document/paths";
+
+import type { EditorCommand } from "./command";
+
+interface SetPathAuthoredStateCommandOptions {
+  pathId: string;
+  visible?: boolean;
+  enabled?: boolean;
+}
+
+function createCommandLabel(options: SetPathAuthoredStateCommandOptions): string {
+  if (options.enabled !== undefined && options.visible === undefined) {
+    return options.enabled ? "Enable path" : "Disable path";
+  }
+
+  if (options.visible !== undefined && options.enabled === undefined) {
+    return options.visible ? "Show path" : "Hide path";
+  }
+
+  return "Update path state";
+}
+
+export function createSetPathAuthoredStateCommand(
+  options: SetPathAuthoredStateCommandOptions
+): EditorCommand {
+  if (options.visible === undefined && options.enabled === undefined) {
+    throw new Error("Path authored state command requires at least one change.");
+  }
+
+  let previousVisible: boolean | null = null;
+  let previousEnabled: boolean | null = null;
+
+  return {
+    id: createOpaqueId("command"),
+    label: createCommandLabel(options),
+    execute(context) {
+      const currentDocument = context.getDocument();
+      const path = currentDocument.paths[options.pathId];
+
+      if (path === undefined) {
+        throw new Error(`Path ${options.pathId} does not exist.`);
+      }
+
+      if (previousVisible === null) {
+        previousVisible = path.visible;
+      }
+
+      if (previousEnabled === null) {
+        previousEnabled = path.enabled;
+      }
+
+      context.setDocument({
+        ...currentDocument,
+        paths: {
+          ...currentDocument.paths,
+          [path.id]: cloneScenePath({
+            ...path,
+            visible: options.visible ?? path.visible,
+            enabled: options.enabled ?? path.enabled
+          })
+        }
+      });
+    },
+    undo(context) {
+      if (previousVisible === null || previousEnabled === null) {
+        return;
+      }
+
+      const currentDocument = context.getDocument();
+      const path = currentDocument.paths[options.pathId];
+
+      if (path === undefined) {
+        return;
+      }
+
+      context.setDocument({
+        ...currentDocument,
+        paths: {
+          ...currentDocument.paths,
+          [path.id]: cloneScenePath({
+            ...path,
+            visible: previousVisible,
+            enabled: previousEnabled
+          })
+        }
+      });
+    }
+  };
+}