From 28823424e9c3d0a56aff76057c00b023ea04500a Mon Sep 17 00:00:00 2001
From: Pavel Tyunin <pavel51tunin@gmail.com>
Date: Tue, 22 Sep 2020 17:42:07 +0300
Subject: [PATCH] Add wxConvAuto::GetEncoding()

---
 include/wx/convauto.h   |  2 ++
 interface/wx/convauto.h |  9 +++++++++
 src/common/convauto.cpp | 31 +++++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+)

diff --git a/include/wx/convauto.h b/include/wx/convauto.h
index 23b21dc41c..57212ab1ad 100644
--- a/include/wx/convauto.h
+++ b/include/wx/convauto.h
@@ -93,6 +93,8 @@ public:
         return m_bomType;
     }
 
+    wxFontEncoding GetEncoding() const;
+
     // Return true if the fall-back encoding is used
     bool IsFallbackEncoding() const
     {
diff --git a/interface/wx/convauto.h b/interface/wx/convauto.h
index 90e769c32a..788d6ec2b9 100644
--- a/interface/wx/convauto.h
+++ b/interface/wx/convauto.h
@@ -146,6 +146,15 @@ public:
     */
     wxBOM GetBOM() const;
 
+    /**
+        Return the detected encoding
+
+        Returns @c wxFONTENCODING_MAX if called before the first use.
+
+        @since 3.1.5
+    */
+    wxBOM GetEncoding() const;
+
     /**
         Check if the fall-back encoding is used.
 
diff --git a/src/common/convauto.cpp b/src/common/convauto.cpp
index 952b4455f5..dca91eb59b 100644
--- a/src/common/convauto.cpp
+++ b/src/common/convauto.cpp
@@ -351,3 +351,34 @@ wxConvAuto::FromWChar(char *dst, size_t dstLen,
 
     return m_conv->FromWChar(dst, dstLen, src, srcLen);
 }
+
+wxFontEncoding wxConvAuto::GetEncoding() const
+{
+    switch ( m_bomType )
+    {
+        case wxBOM_UTF32BE:
+            return wxFONTENCODING_UTF32BE;
+        case wxBOM_UTF32LE:
+            return wxFONTENCODING_UTF32LE;
+        case wxBOM_UTF16BE:
+            return wxFONTENCODING_UTF16BE;
+        case wxBOM_UTF16LE:
+            return wxFONTENCODING_UTF16LE;
+        case wxBOM_UTF8:
+            return wxFONTENCODING_UTF8;
+
+        case wxBOM_Unknown:
+        case wxBOM_None:
+            if ( !m_conv )
+                return wxFONTENCODING_MAX;
+            else if ( !m_ownsConv )
+                return wxFONTENCODING_UTF8;
+            else if ( m_encDefault != wxFONTENCODING_DEFAULT )
+                return m_encDefault;
+            else
+                return GetFallbackEncoding();
+    }
+
+    wxFAIL_MSG( "unknown BOM type" );
+    return wxFONTENCODING_MAX;
+}