Super-basic title-case conversion method

No grammatical parsing, so only useful for very simple cases

python/core/auto_generated/qgsstringutils.sip.in

@@ -174,6 +174,7 @@ class QgsStringUtils
       AllUppercase,
       AllLowercase,
       ForceFirstLetterToCapital,
+      TitleCase,
     };
 
     static QString capitalize( const QString &string, Capitalization capitalization );

src/core/qgsstringutils.cpp

@@ -56,6 +56,37 @@ QString QgsStringUtils::capitalize( const QString &string, QgsStringUtils::Capit
       return temp;
     }
 
+    case TitleCase:
+    {
+      // yes, this is MASSIVELY simplifying the problem!!
+
+      static QStringList smallWords;
+      if ( smallWords.empty() )
+      {
+        smallWords = QObject::tr( "a|an|and|as|at|but|by|en|for|if|in|nor|of|on|or|per|the|to|vs.|vs|via" ).split( '|' );
+      }
+
+      const QStringList parts = string.split( ' ' );
+      QString result;
+      bool firstWord = true;
+      for ( const QString &word : qgis::as_const( parts ) )
+      {
+        if ( word.isEmpty() )
+        {
+          result += ' ';
+        }
+        else if ( firstWord || !smallWords.contains( word ) )
+        {
+          result += ' ' + word.at( 0 ).toUpper() + word.mid( 1 );
+          firstWord = false;
+        }
+        else
+        {
+          result += ' ' + word;
+        }
+      }
+      return result;
+    }
   }
   // no warnings
   return string;

src/core/qgsstringutils.h

@@ -188,6 +188,7 @@ class CORE_EXPORT QgsStringUtils
       AllUppercase = QFont::AllUppercase, //!< Convert all characters to uppercase
       AllLowercase = QFont::AllLowercase,  //!< Convert all characters to lowercase
       ForceFirstLetterToCapital = QFont::Capitalize, //!< Convert just the first letter of each word to uppercase, leave the rest untouched
+      TitleCase = QFont::Capitalize + 1000, //!< Simple title case conversion - does not fully grammatically parse the text and uses simple rules only. Note that this method does not convert any characters to lowercase, it only uppercases required letters. Callers must ensure that input strings are already lowercased.
     };
 
     /**