Add delete commands for box brush, entity, and model instance

src/commands/delete-box-brush-command.ts

@@ -0,0 +1,78 @@
+import { createOpaqueId } from "../core/ids";
+import type { EditorSelection } from "../core/selection";
+import type { ToolMode } from "../core/tool-mode";
+import { cloneBoxBrush, type BoxBrush } from "../document/brushes";
+
+import { cloneSelectionForCommand, removeBrush } from "./brush-command-helpers";
+import type { EditorCommand } from "./command";
+
+function selectionIncludesBrush(selection: EditorSelection, brushId: string): boolean {
+  return (
+    (selection.kind === "brushes" && selection.ids.includes(brushId)) ||
+    (selection.kind === "brushFace" && selection.brushId === brushId)
+  );
+}
+
+export function createDeleteBoxBrushCommand(brushId: string): EditorCommand {
+  let previousBrush: BoxBrush | null = null;
+  let previousSelection: EditorSelection | null = null;
+  let previousToolMode: ToolMode | null = null;
+
+  return {
+    id: createOpaqueId("command"),
+    label: "Delete box brush",
+    execute(context) {
+      const currentDocument = context.getDocument();
+      const currentBrush = currentDocument.brushes[brushId];
+
+      if (currentBrush === undefined) {
+        throw new Error(`Box brush ${brushId} does not exist.`);
+      }
+
+      if (previousBrush === null) {
+        previousBrush = cloneBoxBrush(currentBrush);
+      }
+
+      if (previousSelection === null) {
+        previousSelection = cloneSelectionForCommand(context.getSelection());
+      }
+
+      if (previousToolMode === null) {
+        previousToolMode = context.getToolMode();
+      }
+
+      context.setDocument(removeBrush(currentDocument, brushId));
+
+      if (selectionIncludesBrush(context.getSelection(), brushId)) {
+        context.setSelection({
+          kind: "none"
+        });
+      }
+
+      context.setToolMode("select");
+    },
+    undo(context) {
+      if (previousBrush === null) {
+        return;
+      }
+
+      const currentDocument = context.getDocument();
+
+      context.setDocument({
+        ...currentDocument,
+        brushes: {
+          ...currentDocument.brushes,
+          [previousBrush.id]: cloneBoxBrush(previousBrush)
+        }
+      });
+
+      if (previousSelection !== null) {
+        context.setSelection(previousSelection);
+      }
+
+      if (previousToolMode !== null) {
+        context.setToolMode(previousToolMode);
+      }
+    }
+  };
+}