From 2169743b2e8a4a37b85fa8218bc879d61021d151 Mon Sep 17 00:00:00 2001
From: ShikiSuen <shikisuen@outlook.com>
Date: Tue, 22 Feb 2022 21:21:58 +0800
Subject: [PATCH] KeyHandler // Add -(Bool)IsBuilderEmpty.

---
 Source/Modules/ControllerModules/KeyHandler.h  | 1 +
 Source/Modules/ControllerModules/KeyHandler.mm | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/Source/Modules/ControllerModules/KeyHandler.h b/Source/Modules/ControllerModules/KeyHandler.h
index 4aa5bd4a..730ab28a 100644
--- a/Source/Modules/ControllerModules/KeyHandler.h
+++ b/Source/Modules/ControllerModules/KeyHandler.h
@@ -39,6 +39,7 @@ extern InputMode imeModeNULL;
 
 @interface KeyHandler : NSObject
 
+- (BOOL)isBuilderEmpty;
 - (BOOL)handleInput:(KeyHandlerInput *)input
               state:(InputState *)state
       stateCallback:(void (^)(InputState *))stateCallback
diff --git a/Source/Modules/ControllerModules/KeyHandler.mm b/Source/Modules/ControllerModules/KeyHandler.mm
index eb042f1c..44cd1383 100644
--- a/Source/Modules/ControllerModules/KeyHandler.mm
+++ b/Source/Modules/ControllerModules/KeyHandler.mm
@@ -87,6 +87,14 @@ static NSString *const kGraphVizOutputfile = @"/tmp/vChewing-visualization.dot";
     return _inputMode;
 }
 
+- (BOOL)isBuilderEmpty {
+    if (_builder->grid().width() == 0) {
+        return YES;
+    } else {
+        return NO;
+    }
+}
+
 - (void)setInputMode:(NSString *)value
 {
     NSString *newInputMode;