Switch to default dark theme as dark mode is enabled

1. Add default dark theme.
2. Switch to default dark theme when dark mode is enabled considering both situations:
   Style Configurator is or ont launched.

Close #9847

PowerEditor/src/Notepad_plus.cpp

@@ -7546,6 +7546,43 @@ void Notepad_plus::refreshDarkMode()
 		break;
 	}
 
+
+	NppParameters& nppParams = NppParameters::getInstance();
+	ThemeSwitcher & themeSwitcher = nppParams.getThemeSwitcher();
+	generic_string themePath;
+	generic_string themeName;
+	const TCHAR darkModeXmlFileName[] = TEXT("DarkModeDefault.xml");
+	if (NppDarkMode::isEnabled())
+	{
+		themePath = themeSwitcher.getThemeDirPath();
+		PathAppend(themePath, darkModeXmlFileName);
+
+		themeName = themeSwitcher.getThemeFromXmlFileName(themePath.c_str());
+	}
+	else
+	{
+		//use _stylerPath;
+		
+		pair<generic_string, generic_string> & themeInfo = themeSwitcher.getElementFromIndex(0);
+		themePath = themeInfo.second;
+		themeName = themeSwitcher.getDefaultThemeLabel();
+	}
+
+	if (::PathFileExists(themePath.c_str()))
+	{
+		nppParams.getNppGUI()._themeName = themePath;
+
+		if (_configStyleDlg.isCreated())
+		{
+			_configStyleDlg.selectThemeByName(themeName.c_str());
+		}
+		else
+		{
+			nppParams.reloadStylers(themePath.c_str());
+			::SendMessage(_pPublicInterface->getHSelf(), WM_UPDATESCINTILLAS, 0, 0);
+		}
+	}
+
 	if (NppDarkMode::isExperimentalEnabled())
 	{
 		RECT rcClient;

PowerEditor/src/Notepad_plus_Window.cpp

@@ -203,6 +203,7 @@ void Notepad_plus_Window::init(HINSTANCE hInst, HWND parent, const TCHAR *cmdLin
     {
         themeDir = nppParams.getAppDataNppDir();
 	    PathAppend(themeDir, TEXT("themes\\"));
+		themeSwitcher.setThemeDirPath(themeDir);
 	    _notepad_plus_plus_core.getMatchedFileNames(themeDir.c_str(), patterns, fileNames, false, false);
 	    for (size_t i = 0, len = fileNames.size() ; i < len ; ++i)
 	    {

PowerEditor/src/Parameters.cpp

@@ -895,7 +895,7 @@ NppParameters::~NppParameters()
 }
 
 
-bool NppParameters::reloadStylers(TCHAR* stylePath)
+bool NppParameters::reloadStylers(const TCHAR* stylePath)
 {
 	delete _pXmlUserStylerDoc;
 

PowerEditor/src/Parameters.h

@@ -1277,7 +1277,7 @@ public:
 
 	void addDefaultThemeFromXml(const generic_string& xmlFullPath)
 	{
-		_themeList.push_back(std::pair<generic_string, generic_string>(TEXT("Default (stylers.xml)"), xmlFullPath));
+		_themeList.push_back(std::pair<generic_string, generic_string>(_defaultThemeLabel, xmlFullPath));
 	}
 
 	generic_string getThemeFromXmlFileName(const TCHAR *fn) const;
@@ -1312,8 +1312,15 @@ public:
 		return _themeList[index];
 	}
 
+	void setThemeDirPath(generic_string themeDirPath) { _themeDirPath = themeDirPath; }
+	generic_string getThemeDirPath() const { return _themeDirPath; }
+
+	generic_string getDefaultThemeLabel() const { return _defaultThemeLabel; }
+
 private:
 	std::vector<std::pair<generic_string, generic_string>> _themeList;
+	generic_string _themeDirPath;
+	const generic_string _defaultThemeLabel = TEXT("Default (stylers.xml)");
 	generic_string _stylesXmlPath;
 };
 
@@ -1364,7 +1371,7 @@ public:
 
 	bool load();
 	bool reloadLang();
-	bool reloadStylers(TCHAR *stylePath = nullptr);
+	bool reloadStylers(const TCHAR *stylePath = nullptr);
 	void destroyInstance();
 	generic_string getSettingsFolder();
 

PowerEditor/src/WinControls/ColourPicker/WordStyleDlg.cpp

@@ -226,8 +226,8 @@ INT_PTR CALLBACK WordStyleDlg::run_dlgProc(UINT Message, WPARAM wParam, LPARAM l
 							NppParameters& nppParamInst = NppParameters::getInstance();
 							if (_restoreInvalid)
 							{
-								generic_string str( nppParamInst.getNppGUI()._themeName );
-								nppParamInst.reloadStylers( &str[0] );
+								generic_string str(nppParamInst.getNppGUI()._themeName);
+								nppParamInst.reloadStylers(str.c_str());
 							}
 
 							LexerStylerArray & lsArray = nppParamInst.getLStylerArray();
@@ -395,11 +395,7 @@ INT_PTR CALLBACK WordStyleDlg::run_dlgProc(UINT Message, WPARAM wParam, LPARAM l
 										break;
 
 									case IDC_SWITCH2THEME_COMBO :
-										switchToTheme();
-										setVisualFromStyleList();
-										notifyDataModified();
-										_isThemeDirty = false;
-										apply();
+										applyCurrentSelectedThemeAndUpdateUI();
 										break;
 								}
 								return TRUE;
@@ -646,13 +642,35 @@ void WordStyleDlg::switchToTheme()
 		if ( mb_response == IDYES )
 			(NppParameters::getInstance()).writeStyles(_lsArray, _globalStyles);
 	}
-	nppParamInst.reloadStylers(&_themeName[0]);
+	nppParamInst.reloadStylers(_themeName.c_str());
 
 	loadLangListFromNppParam();
 	_restoreInvalid = true;
 
 }
 
+void WordStyleDlg::applyCurrentSelectedThemeAndUpdateUI()
+{
+	switchToTheme();
+	setVisualFromStyleList();
+	notifyDataModified();
+	_isThemeDirty = false;
+	apply();
+}
+
+bool WordStyleDlg::selectThemeByName(const TCHAR* themeName)
+{
+	LRESULT iTheme = ::SendMessage(_hSwitch2ThemeCombo, CB_FINDSTRING, 1, reinterpret_cast<LPARAM>(themeName));
+	if (iTheme == CB_ERR)
+		return false;
+
+	::SendMessage(_hSwitch2ThemeCombo, CB_SETCURSEL, iTheme, 0);
+
+	applyCurrentSelectedThemeAndUpdateUI();
+
+	return true;
+}
+
 void WordStyleDlg::setStyleListFromLexer(int index)
 {
 	_currentLexerIndex = index;

PowerEditor/src/WinControls/ColourPicker/WordStyleDlg.h

@@ -107,6 +107,7 @@ public :
 	    ::SendMessage(_hSwitch2ThemeCombo, CB_ADDSTRING, 0, reinterpret_cast<LPARAM>(themeInfo.first.c_str()));
     };
 
+	bool selectThemeByName(const TCHAR* themeName);
 
 private :
     ColourPicker *_pFgColour = nullptr;
@@ -225,4 +226,6 @@ private :
 		::ShowWindow(::GetDlgItem(_hSelf, IDC_GLOBAL_UNDERLINE_CHECK), show?SW_SHOW:SW_HIDE);
 		_isShownGOCtrls = show;
 	};
+
+	void applyCurrentSelectedThemeAndUpdateUI();
 };