Add SET_COLOUR string code

src/strings.cpp

@@ -1304,6 +1304,14 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
 				break;
 			}
 
+			case SCC_SET_COLOUR: {// {SET_COLOUR}
+				int64 tc = args->GetInt64(SCC_SET_COLOUR);
+				if (tc >= 0 && tc < TC_END) {
+					buff += Utf8Encode(buff, SCC_BLUE + tc);
+				}
+				break;
+			}
+
 			case SCC_REVISION: // {REV}
 				buff = strecpy(buff, _openttd_revision, last);
 				break;

src/table/control_codes.h

@@ -132,6 +132,7 @@ enum StringControlCode {
 	SCC_BLACK,
 	SCC_PUSH_COLOUR,
 	SCC_POP_COLOUR,
+	SCC_SET_COLOUR,
 
 	SCC_CONSUME_ARG,
 

src/table/strgen_tables.h

@@ -60,6 +60,7 @@ static const CmdStruct _cmd_structs[] = {
 	{"BLACK",             EmitSingleChar, SCC_BLACK,              0, -1, C_DONTCOUNT},
 	{"PUSH_COLOUR",       EmitSingleChar, SCC_PUSH_COLOUR,        0, -1, C_DONTCOUNT},
 	{"POP_COLOUR",        EmitSingleChar, SCC_POP_COLOUR,         0, -1, C_DONTCOUNT},
+	{"SET_COLOUR",        EmitSingleChar, SCC_SET_COLOUR,         1, -1, C_NONE},
 
 	{"REV",               EmitSingleChar, SCC_REVISION,           0, -1, C_NONE}, // openttd revision string