feat: add canUndo() and canRedo(). (#155)

marktext · Mar 6, 2024 · 73b7354 · 73b7354
1 parent 0432cf0
commit 73b7354
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/packages/history/index.ts b/packages/history/index.ts
@@ -143,6 +143,10 @@ class History {
     }
   }
 
+  canRedo() {
+    return this.stack.redo.length > 0;
+  }
+
   redo() {
     this.change('redo', 'undo');
   }
@@ -152,6 +156,10 @@ class History {
     transformStack(this.stack.redo, op);
   }
 
+  canUndo() {
+    return this.stack.undo.length > 0;
+  }
+
   undo() {
     this.change('undo', 'redo');
   }