From e4477c9926fbf50336d058c1dad37b6d6cc27724 Mon Sep 17 00:00:00 2001
From: Mikhail Lobotskiy <mikhail.lobotskiy@onlyoffice.com>
Date: Tue, 19 Dec 2023 15:10:27 +0400
Subject: [PATCH] Add `IsInit()` function

---
 DesktopEditor/doctrenderer/json/json.cpp      |  6 ++++++
 DesktopEditor/doctrenderer/json/json.h        |  4 ++++
 DesktopEditor/doctrenderer/test/json/main.cpp | 21 +++++++++++++++++++
 3 files changed, 31 insertions(+)

diff --git a/DesktopEditor/doctrenderer/json/json.cpp b/DesktopEditor/doctrenderer/json/json.cpp
index 96cc8bef95..d4883c15cb 100644
--- a/DesktopEditor/doctrenderer/json/json.cpp
+++ b/DesktopEditor/doctrenderer/json/json.cpp
@@ -42,6 +42,12 @@ namespace NSJSON
 		return m_internal->m_type == CTypedValue::vtNull;
 	}
 
+	bool IValue::IsInit() const
+	{
+		// the same as (m_internal->m_type != CTypedValue::vtUndefined && m_internal->m_type != CTypedValue::vtNull) but a little bit faster
+		return m_internal->m_value.get() != nullptr;
+	}
+
 	bool IValue::IsBool() const
 	{
 		return (m_internal->m_type == CTypedValue::vtPrimitive &&
diff --git a/DesktopEditor/doctrenderer/json/json.h b/DesktopEditor/doctrenderer/json/json.h
index e8634d635a..527bc3fb09 100644
--- a/DesktopEditor/doctrenderer/json/json.h
+++ b/DesktopEditor/doctrenderer/json/json.h
@@ -50,6 +50,10 @@ namespace NSJSON
 		 * Returns true if the value is null.
 		 */
 		bool IsNull() const;
+		/**
+		 * Returns true if the value is not undefined or null.
+		 */
+		bool IsInit() const;
 		/**
 		 * Returns true if the value is a boolean value.
 		 */
diff --git a/DesktopEditor/doctrenderer/test/json/main.cpp b/DesktopEditor/doctrenderer/test/json/main.cpp
index 30fb4eb1b4..8501774af7 100644
--- a/DesktopEditor/doctrenderer/test/json/main.cpp
+++ b/DesktopEditor/doctrenderer/test/json/main.cpp
@@ -571,6 +571,27 @@ TEST_F(CJSONTest, wrong_usage)
 #endif
 }
 
+TEST_F(CJSONTest, is_init)
+{
+	CValue val;
+	EXPECT_FALSE(val.IsInit());
+	val = CValue::CreateNull();
+	EXPECT_FALSE(val.IsInit());
+	val = 42;
+	EXPECT_TRUE(val.IsInit());
+	CValue val2 = val;
+	val2 = CValue::CreateUndefined();
+	EXPECT_TRUE(val.IsInit());
+	EXPECT_FALSE(val2.IsInit());
+	CValueRef ref = val;
+	ref = CValue::CreateUndefined();
+	EXPECT_FALSE(val.IsInit());
+	EXPECT_FALSE(ref.IsInit());
+	ref = 3;
+	EXPECT_TRUE(val.IsInit());
+	EXPECT_TRUE(ref.IsInit());
+}
+
 // ----------- toJS() tests -----------
 
 TEST_F(CJSONTest, toJS_undefined)