Enhance Insert Custom Date command by using MS datetime format

Fix #10467, close #10480

PowerEditor/src/MISC/Common/Common.cpp

@@ -1331,25 +1331,106 @@ int nbDigitsFromNbLines(size_t nbLines)
 	return nbDigits;
 }
 
+namespace
+{
+	constexpr TCHAR timeFmtEscapeChar = 0x1;
+	constexpr TCHAR middayFormat[] = _T("tt");
+
+	// Returns AM/PM string defined by the system locale for the specified time.
+	// This string may be empty or customized.
+	generic_string getMiddayString(const TCHAR* localeName, const SYSTEMTIME& st)
+	{
+		generic_string midday;
+		midday.resize(MAX_PATH);
+		int ret = GetTimeFormatEx(localeName, 0, &st, middayFormat, &midday[0], static_cast<int>(midday.size()));
+		if (ret > 0)
+			midday.resize(ret - 1); // Remove the null-terminator.
+		else
+			midday.clear();
+		return midday;
+	}
+
+	// Replaces conflicting time format specifiers by a special character.
+	bool escapeTimeFormat(generic_string& format)
+	{
+		bool modified = false;
+		for (auto& ch : format)
+		{
+			if (ch == middayFormat[0])
+			{
+				ch = timeFmtEscapeChar;
+				modified = true;
+			}
+		}
+		return modified;
+	}
+
+	// Replaces special time format characters by actual AM/PM string.
+	void unescapeTimeFormat(generic_string& format, const generic_string& midday)
+	{
+		if (midday.empty())
+		{
+			auto it = std::remove(format.begin(), format.end(), timeFmtEscapeChar);
+			if (it != format.end())
+				format.erase(it, format.end());
+		}
+		else
+		{
+			size_t i = 0;
+			while ((i = format.find(timeFmtEscapeChar, i)) != generic_string::npos)
+			{
+				if (i + 1 < format.size() && format[i + 1] == timeFmtEscapeChar)
+				{
+					// 'tt' => AM/PM
+					format.erase(i, std::size(middayFormat) - 1);
+					format.insert(i, midday);
+				}
+				else
+				{
+					// 't' => A/P
+					format[i] = midday[0];
+				}
+			}
+		}
+	}
+}
+
 generic_string getDateTimeStrFrom(const generic_string& dateTimeFormat, const SYSTEMTIME& st)
 {
-	generic_string dateTimeStr = dateTimeFormat;
-	dateTimeStr = stringReplace(dateTimeStr, TEXT("Y"), std::to_wstring(st.wYear));
-	wchar_t buf[3];
-	_snwprintf(buf, sizeof(buf), TEXT("%02d"), st.wMonth);
-	dateTimeStr = stringReplace(dateTimeStr, TEXT("M"), buf);
+	const TCHAR* localeName = LOCALE_NAME_USER_DEFAULT;
+	const DWORD flags = 0;
 
-	_snwprintf(buf, sizeof(buf), TEXT("%02d"), st.wDay);
-	dateTimeStr = stringReplace(dateTimeStr, TEXT("D"), buf);
+	constexpr int bufferSize = MAX_PATH;
+	TCHAR buffer[bufferSize] = {};
+	int ret = 0;
 
-	_snwprintf(buf, sizeof(buf), TEXT("%02d"), st.wHour);
-	dateTimeStr = stringReplace(dateTimeStr, TEXT("h"), buf);
 
-	_snwprintf(buf, sizeof(buf), TEXT("%02d"), st.wMinute);
-	dateTimeStr = stringReplace(dateTimeStr, TEXT("m"), buf);
+	// 1. Escape 'tt' that means AM/PM or 't' that means A/P.
+	// This is needed to avoid conflict with 'M' date format that stands for month.
+	generic_string newFormat = dateTimeFormat;
+	const bool hasMiddayFormat = escapeTimeFormat(newFormat);
 
-	_snwprintf(buf, sizeof(buf), TEXT("%02d"), st.wSecond);
-	dateTimeStr = stringReplace(dateTimeStr, TEXT("s"), buf);
+	// 2. Format the time (h/m/s/t/H).
+	ret = GetTimeFormatEx(localeName, flags, &st, newFormat.c_str(), buffer, bufferSize);
+	if (ret != 0)
+	{
+		// 3. Format the date (d/y/g/M). 
+		// Now use the buffer as a format string to process the format specifiers not recognized by GetTimeFormatEx().
+		ret = GetDateFormatEx(localeName, flags, &st, buffer, buffer, bufferSize, nullptr);
+	}
 
-	return dateTimeStr;
+	if (ret != 0)
+	{
+		if (hasMiddayFormat)
+		{
+			// 4. Now format only the AM/PM string.
+			const generic_string midday = getMiddayString(localeName, st);
+			generic_string result = buffer;
+			unescapeTimeFormat(result, midday);
+			return result;
+		}
+		return buffer;
+	}
+
+	return {};
 }

PowerEditor/src/Parameters.h

@@ -784,7 +784,7 @@ struct NppGUI final
 	generic_string _uriSchemes = TEXT("svn:// cvs:// git:// imap:// irc:// irc6:// ircs:// ldap:// ldaps:// news: telnet:// gopher:// ssh:// sftp:// smb:// skype: snmp:// spotify: steam:// sms: slack:// chrome:// bitcoin:");
 	NewDocDefaultSettings _newDocDefaultSettings;
 
-	generic_string _dateTimeFormat = TEXT("Y-M-D h:m:s");
+	generic_string _dateTimeFormat = TEXT("yyyy-MM-dd HH:mm:ss");
 	bool _dateTimeReverseDefaultOrder = false;
 
 	void setTabReplacedBySpace(bool b) {_tabReplacedBySpace = b;};

PowerEditor/src/WinControls/Preference/preference.rc

@@ -389,8 +389,8 @@ BEGIN
     LTEXT           "* The modification of this setting needs to restart Notepad++",IDD_STATIC_RESTARTNOTE,110,70,239,20
     GROUPBOX        "Customize insert Date Time",IDC_DATETIMEFORMAT_GB_STATIC,90,97,268,105,BS_CENTER
     CONTROL         "Reverse default date time order (short && long formats)",IDD_DATETIMEFORMAT_REVERSEORDER_CHECK,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,103,113,241,10
-    RTEXT           "Y-M-D h:m:s\nh:m:s D/M/Y\nM D, Y h:m",IDC_STATIC,134,142,77,25
-    LTEXT           "1985-10-26 01:24:00\n01:24:00 26/10/1985\n10 26, 1985 01:24",IDC_STATIC,234,142,94,25
+    RTEXT           "yyyy-MM-dd HH:mm:ss\nHH:mm:ss dd/MM/yy\nMMM d, yyyy h:m",IDC_STATIC,134,142,77,25
+    LTEXT           "1985-10-26 01:24:00\n01:24:00 26/10/85\nOct 26, 1985 1:24",IDC_STATIC,234,142,94,25
     RTEXT           "Custom format:",IDD_DATETIMEFORMAT_STATIC,92,172,71,8
     EDITTEXT        IDC_DATETIMEFORMAT_EDIT,164,170,179,14,ES_AUTOHSCROLL
     LTEXT           "",IDD_DATETIMEFORMAT_RESULT_STATIC,166,187,180,8