1 files changed, 29 insertions, 0 deletions
diff --git a/src/main/java/de/pixart/messenger/ui/util/PendingActionHelper.java b/src/main/java/de/pixart/messenger/ui/util/PendingActionHelper.java
new file mode 100644
index 000000000..06c291711
--- /dev/null
+++ b/src/main/java/de/pixart/messenger/ui/util/PendingActionHelper.java
@@ -0,0 +1,29 @@
+package de.pixart.messenger.ui.util;
+
+/**
+ * Created by mxf on 2018/4/3.
+ */
+
+public class PendingActionHelper {
+
+    private PendingAction pendingAction;
+
+    public void push(PendingAction pendingAction) {
+        this.pendingAction = pendingAction;
+    }
+
+    public void execute() {
+        if (pendingAction != null) {
+            pendingAction.execute();
+            pendingAction = null;
+        }
+    }
+
+    public void undo() {
+        pendingAction = null;
+    }
+
+    public interface PendingAction {
+        void execute();
+    }
+}
+\ No newline at end of file