Move NewGRF extension feature/property lists to separate file

src/newgrf_extension.h

@@ -0,0 +1,55 @@
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file newgrf_extension.h NewGRF extension support. */
+
+#ifndef NEWGRF_EXTENSION_H
+#define NEWGRF_EXTENSION_H
+
+enum Action0RemapPropertyIds {
+	A0RPI_UNKNOWN_IGNORE = 0x200,
+	A0RPI_UNKNOWN_ERROR,
+
+	A0RPI_STATION_MIN_BRIDGE_HEIGHT,
+	A0RPI_STATION_DISALLOWED_BRIDGE_PILLARS,
+	A0RPI_BRIDGE_MENU_ICON,
+	A0RPI_BRIDGE_PILLAR_FLAGS,
+	A0RPI_BRIDGE_AVAILABILITY_FLAGS,
+	A0RPI_RAILTYPE_ENABLE_PROGRAMMABLE_SIGNALS,
+	A0RPI_RAILTYPE_ENABLE_NO_ENTRY_SIGNALS,
+	A0RPI_RAILTYPE_ENABLE_RESTRICTED_SIGNALS,
+	A0RPI_RAILTYPE_DISABLE_REALISTIC_BRAKING,
+	A0RPI_RAILTYPE_ENABLE_SIGNAL_RECOLOUR,
+	A0RPI_RAILTYPE_EXTRA_ASPECTS,
+	A0RPI_ROADTYPE_EXTRA_FLAGS,
+	A0RPI_GLOBALVAR_EXTRA_STATION_NAMES,
+	A0RPI_SIGNALS_ENABLE_PROGRAMMABLE_SIGNALS,
+	A0RPI_SIGNALS_ENABLE_NO_ENTRY_SIGNALS,
+	A0RPI_SIGNALS_ENABLE_RESTRICTED_SIGNALS,
+	A0RPI_SIGNALS_ENABLE_SIGNAL_RECOLOUR,
+	A0RPI_SIGNALS_EXTRA_ASPECTS,
+};
+
+
+/** Action14 feature definition */
+struct GRFFeatureInfo {
+	const char *name; // nullptr indicates the end of the list
+	uint16 version;
+
+	/** Create empty object used to identify the end of a list. */
+	GRFFeatureInfo() :
+		name(nullptr),
+		version(0)
+	{}
+
+	GRFFeatureInfo(const char *name, uint16 version) :
+		name(name),
+		version(version)
+	{}
+};
+
+#endif