From 92812d0b0b1a78febc34d3e5fbb551e50ad77eb9 Mon Sep 17 00:00:00 2001
From: Techjar <tecknojar@gmail.com>
Date: Thu, 16 Jul 2020 18:47:51 -0400
Subject: [PATCH] QtUtils: Add UTF8CodePointCountValidator

---
 Source/Core/DolphinQt/CMakeLists.txt          |  6 ++++--
 Source/Core/DolphinQt/DolphinQt.vcxproj       |  5 ++++-
 .../QtUtils/UTF8CodePointCountValidator.cpp   | 20 +++++++++++++++++++
 .../QtUtils/UTF8CodePointCountValidator.h     | 19 ++++++++++++++++++
 4 files changed, 47 insertions(+), 3 deletions(-)
 create mode 100644 Source/Core/DolphinQt/QtUtils/UTF8CodePointCountValidator.cpp
 create mode 100644 Source/Core/DolphinQt/QtUtils/UTF8CodePointCountValidator.h

diff --git a/Source/Core/DolphinQt/CMakeLists.txt b/Source/Core/DolphinQt/CMakeLists.txt
index 3ef723300d..269083c4dc 100644
--- a/Source/Core/DolphinQt/CMakeLists.txt
+++ b/Source/Core/DolphinQt/CMakeLists.txt
@@ -235,6 +235,8 @@ add_executable(dolphin-emu
   QtUtils/ParallelProgressDialog.h
   QtUtils/ImageConverter.cpp
   QtUtils/ImageConverter.h
+  QtUtils/UTF8CodePointCountValidator.cpp
+  QtUtils/UTF8CodePointCountValidator.h
   QtUtils/WindowActivationEventFilter.cpp
   QtUtils/WindowActivationEventFilter.h
   QtUtils/WinIconHelper.cpp
@@ -459,8 +461,8 @@ if(APPLE)
   include(DolphinPostprocessBundle)
   dolphin_postprocess_bundle(dolphin-emu)
   # Fix rpath
-  add_custom_command(TARGET dolphin-emu 
-    POST_BUILD COMMAND 
+  add_custom_command(TARGET dolphin-emu
+    POST_BUILD COMMAND
     ${CMAKE_INSTALL_NAME_TOOL} -add_rpath "@executable_path/../Frameworks/"
     $<TARGET_FILE:dolphin-emu>)
 else()
diff --git a/Source/Core/DolphinQt/DolphinQt.vcxproj b/Source/Core/DolphinQt/DolphinQt.vcxproj
index 0fdfc53118..1e4fd3b0b2 100644
--- a/Source/Core/DolphinQt/DolphinQt.vcxproj
+++ b/Source/Core/DolphinQt/DolphinQt.vcxproj
@@ -186,6 +186,7 @@
     <QtMoc Include="QtUtils\FlowLayout.h" />
     <QtMoc Include="QtUtils\ModalMessageBox.h" />
     <QtMoc Include="QtUtils\ParallelProgressDialog.h" />
+    <QtMoc Include="QtUtils\UTF8CodePointCountValidator.h" />
     <QtMoc Include="QtUtils\WindowActivationEventFilter.h" />
     <QtMoc Include="QtUtils\WrapInScrollArea.h" />
     <QtMoc Include="RenderWidget.h" />
@@ -291,6 +292,7 @@
     <ClCompile Include="$(QtMocOutPrefix)NewPatchDialog.cpp" />
     <ClCompile Include="$(QtMocOutPrefix)PadMappingDialog.cpp" />
     <ClCompile Include="$(QtMocOutPrefix)ParallelProgressDialog.cpp" />
+    <ClCompile Include="$(QtMocOutPrefix)UTF8CodePointCountValidator.cpp" />
     <ClCompile Include="$(QtMocOutPrefix)PatchesWidget.cpp" />
     <ClCompile Include="$(QtMocOutPrefix)PatchInstructionDialog.cpp" />
     <ClCompile Include="$(QtMocOutPrefix)PathPane.cpp" />
@@ -433,6 +435,7 @@
     <ClCompile Include="QtUtils\FlowLayout.cpp" />
     <ClCompile Include="QtUtils\ImageConverter.cpp" />
     <ClCompile Include="QtUtils\ModalMessageBox.cpp" />
+    <ClCompile Include="QtUtils\UTF8CodePointCountValidator.cpp" />
     <ClCompile Include="QtUtils\WindowActivationEventFilter.cpp" />
     <ClCompile Include="QtUtils\WrapInScrollArea.cpp" />
     <ClCompile Include="RenderWidget.cpp" />
@@ -555,4 +558,4 @@
     <Message Text="Copy: @(BinaryFiles) -&gt; $(BinaryOutputDir)" Importance="High" />
     <Copy SourceFiles="@(BinaryFiles)" DestinationFolder="$(BinaryOutputDir)" />
   </Target>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/Source/Core/DolphinQt/QtUtils/UTF8CodePointCountValidator.cpp b/Source/Core/DolphinQt/QtUtils/UTF8CodePointCountValidator.cpp
new file mode 100644
index 0000000000..d5020ea8dd
--- /dev/null
+++ b/Source/Core/DolphinQt/QtUtils/UTF8CodePointCountValidator.cpp
@@ -0,0 +1,20 @@
+// Copyright 2020 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "DolphinQt/QtUtils/UTF8CodePointCountValidator.h"
+
+#include "Common/StringUtil.h"
+
+UTF8CodePointCountValidator::UTF8CodePointCountValidator(int max_count, QObject* parent)
+    : QValidator(parent), m_max_count(max_count)
+{
+}
+
+QValidator::State UTF8CodePointCountValidator::validate(QString& input, int& pos) const
+{
+  if (StringUTF8CodePointCount(input.toStdString()) > m_max_count)
+    return QValidator::Invalid;
+
+  return QValidator::Acceptable;
+}
diff --git a/Source/Core/DolphinQt/QtUtils/UTF8CodePointCountValidator.h b/Source/Core/DolphinQt/QtUtils/UTF8CodePointCountValidator.h
new file mode 100644
index 0000000000..89a8bc8e1d
--- /dev/null
+++ b/Source/Core/DolphinQt/QtUtils/UTF8CodePointCountValidator.h
@@ -0,0 +1,19 @@
+// Copyright 2020 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QString>
+#include <QValidator>
+
+class UTF8CodePointCountValidator : public QValidator
+{
+  Q_OBJECT
+public:
+  explicit UTF8CodePointCountValidator(int max_count, QObject* parent = nullptr);
+
+  QValidator::State validate(QString& input, int& pos) const override;
+
+  int m_max_count;
+};