Derive NodeMetadata from Metadata

5 files changed, 134 insertions, 55 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index cab5a1139..afb591a04 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -430,6 +430,7 @@ set(common_SRCS
 	mapgen_valleys.cpp
 	mapnode.cpp
 	mapsector.cpp
+	metadata.cpp
 	mg_biome.cpp
 	mg_decoration.cpp
 	mg_ore.cpp
@@ -893,4 +894,3 @@ endif()
 if (BUILD_CLIENT AND USE_FREETYPE)
 	add_subdirectory(cguittfont)
 endif()
-
diff --git a/src/metadata.cpp b/src/metadata.cpp
new file mode 100644
index 000000000..8e04aa2d3
--- /dev/null
+++ b/src/metadata.cpp
@@ -0,0 +1,69 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "metadata.h"
+#include "exceptions.h"
+#include "gamedef.h"
+#include "log.h"
+#include <sstream>
+
+/*
+	Metadata
+*/
+
+void Metadata::clear()
+{
+	m_stringvars.clear();
+}
+
+bool Metadata::empty() const
+{
+	return m_stringvars.size() == 0;
+}
+
+std::string Metadata::getString(const std::string &name,
+	u16 recursion) const
+{
+	StringMap::const_iterator it = m_stringvars.find(name);
+	if (it == m_stringvars.end())
+		return "";
+
+	return resolveString(it->second, recursion);
+}
+
+void Metadata::setString(const std::string &name, const std::string &var)
+{
+	if (var.empty()) {
+		m_stringvars.erase(name);
+	} else {
+		m_stringvars[name] = var;
+	}
+}
+
+std::string Metadata::resolveString(const std::string &str,
+	u16 recursion) const
+{
+	if (recursion > 1) {
+		return str;
+	}
+	if (str.substr(0, 2) == "${" && str[str.length() - 1] == '}') {
+		return getString(str.substr(2, str.length() - 3), recursion + 1);
+	}
+	return str;
+}
diff --git a/src/metadata.h b/src/metadata.h
new file mode 100644
index 000000000..a96bfc408
--- /dev/null
+++ b/src/metadata.h
@@ -0,0 +1,59 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef METADATA_HEADER
+#define METADATA_HEADER
+
+#include "irr_v3d.h"
+#include <iostream>
+#include <vector>
+#include "util/string.h"
+
+/*
+	NodeMetadata stores arbitary amounts of data for special blocks.
+	Used for furnaces, chests and signs.
+
+	There are two interaction methods: inventory menu and text input.
+	Only one can be used for a single metadata, thus only inventory OR
+	text input should exist in a metadata.
+*/
+
+class Inventory;
+class IItemDefManager;
+
+class Metadata
+{
+public:
+	void clear();
+	bool empty() const;
+
+	// Generic key/value store
+	std::string getString(const std::string &name, u16 recursion = 0) const;
+	void setString(const std::string &name, const std::string &var);
+	// Support variable names in values
+	std::string resolveString(const std::string &str, u16 recursion = 0) const;
+	const StringMap &getStrings() const
+	{
+		return m_stringvars;
+	}
+private:
+	StringMap m_stringvars;
+};
+
+#endif
diff --git a/src/nodemetadata.cpp b/src/nodemetadata.cpp
index 0801a028b..9b60cf33e 100644
--- a/src/nodemetadata.cpp
+++ b/src/nodemetadata.cpp
@@ -31,10 +31,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 */
 
 NodeMetadata::NodeMetadata(IItemDefManager *item_def_mgr):
-	m_stringvars(),
 	m_inventory(new Inventory(item_def_mgr))
-{
-}
+{}
 
 NodeMetadata::~NodeMetadata()
 {
@@ -70,13 +68,13 @@ void NodeMetadata::deSerialize(std::istream &is)
 
 void NodeMetadata::clear()
 {
-	m_stringvars.clear();
+	Metadata::clear();
 	m_inventory->clear();
 }
 
 bool NodeMetadata::empty() const
 {
-	return m_stringvars.size() == 0 && m_inventory->getLists().size() == 0;
+	return Metadata::empty() && m_inventory->getLists().size() == 0;
 }
 
 /*
@@ -216,35 +214,3 @@ int NodeMetadataList::countNonEmpty() const
 	}
 	return n;
 }
-
-std::string NodeMetadata::getString(const std::string &name,
-	unsigned short recursion) const
-{
-	StringMap::const_iterator it = m_stringvars.find(name);
-	if (it == m_stringvars.end())
-		return "";
-
-	return resolveString(it->second, recursion);
-}
-
-void NodeMetadata::setString(const std::string &name, const std::string &var)
-{
-	if (var.empty()) {
-		m_stringvars.erase(name);
-	} else {
-		m_stringvars[name] = var;
-	}
-}
-
-std::string NodeMetadata::resolveString(const std::string &str,
-	unsigned short recursion) const
-{
-	if (recursion > 1) {
-		return str;
-	}
-	if (str.substr(0, 2) == "${" && str[str.length() - 1] == '}') {
-		return getString(str.substr(2, str.length() - 3), recursion + 1);
-	}
-	return str;
-}
-
diff --git a/src/nodemetadata.h b/src/nodemetadata.h
index da1bf595d..f46c0fe91 100644
--- a/src/nodemetadata.h
+++ b/src/nodemetadata.h
@@ -20,10 +20,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #ifndef NODEMETADATA_HEADER
 #define NODEMETADATA_HEADER
 
-#include "irr_v3d.h"
-#include <iostream>
-#include <vector>
-#include "util/string.h"
+#include "metadata.h"
 
 /*
 	NodeMetadata stores arbitary amounts of data for special blocks.
@@ -37,7 +34,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 class Inventory;
 class IItemDefManager;
 
-class NodeMetadata
+class NodeMetadata : public Metadata
 {
 public:
 	NodeMetadata(IItemDefManager *item_def_mgr);
@@ -49,16 +46,6 @@ public:
 	void clear();
 	bool empty() const;
 
-	// Generic key/value store
-	std::string getString(const std::string &name, unsigned short recursion = 0) const;
-	void setString(const std::string &name, const std::string &var);
-	// Support variable names in values
-	std::string resolveString(const std::string &str, unsigned short recursion = 0) const;
-	StringMap getStrings() const
-	{
-		return m_stringvars;
-	}
-
 	// The inventory
 	Inventory *getInventory()
 	{
@@ -66,7 +53,6 @@ public:
 	}
 
 private:
-	StringMap m_stringvars;
 	Inventory *m_inventory;
 };
 
@@ -101,4 +87,3 @@ private:
 };
 
 #endif
-