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-rw-r--r--src/script/lua_api/l_nodemeta.cpp332
1 files changed, 332 insertions, 0 deletions
diff --git a/src/script/lua_api/l_nodemeta.cpp b/src/script/lua_api/l_nodemeta.cpp
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index 000000000..511fb38ce
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+++ b/src/script/lua_api/l_nodemeta.cpp
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+/*
+Minetest
+Copyright (C) 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 "cpp_api/scriptapi.h"
+#include "common/c_converter.h"
+#include "common/c_content.h"
+#include "map.h"
+#include "lua_api/l_nodemeta.h"
+#include "common/c_internal.h"
+#include "lua_api/l_inventory.h"
+
+
+/*
+ NodeMetaRef
+*/
+NodeMetaRef* NodeMetaRef::checkobject(lua_State *L, int narg)
+{
+ luaL_checktype(L, narg, LUA_TUSERDATA);
+ void *ud = luaL_checkudata(L, narg, className);
+ if(!ud) luaL_typerror(L, narg, className);
+ return *(NodeMetaRef**)ud; // unbox pointer
+}
+
+NodeMetadata* NodeMetaRef::getmeta(NodeMetaRef *ref, bool auto_create)
+{
+ NodeMetadata *meta = ref->m_env->getMap().getNodeMetadata(ref->m_p);
+ if(meta == NULL && auto_create)
+ {
+ meta = new NodeMetadata(ref->m_env->getGameDef());
+ ref->m_env->getMap().setNodeMetadata(ref->m_p, meta);
+ }
+ return meta;
+}
+
+void NodeMetaRef::reportMetadataChange(NodeMetaRef *ref)
+{
+ // NOTE: This same code is in rollback_interface.cpp
+ // Inform other things that the metadata has changed
+ v3s16 blockpos = getNodeBlockPos(ref->m_p);
+ MapEditEvent event;
+ event.type = MEET_BLOCK_NODE_METADATA_CHANGED;
+ event.p = blockpos;
+ ref->m_env->getMap().dispatchEvent(&event);
+ // Set the block to be saved
+ MapBlock *block = ref->m_env->getMap().getBlockNoCreateNoEx(blockpos);
+ if(block)
+ block->raiseModified(MOD_STATE_WRITE_NEEDED,
+ "NodeMetaRef::reportMetadataChange");
+}
+
+// Exported functions
+
+// garbage collector
+int NodeMetaRef::gc_object(lua_State *L) {
+ NodeMetaRef *o = *(NodeMetaRef **)(lua_touserdata(L, 1));
+ delete o;
+ return 0;
+}
+
+// get_string(self, name)
+int NodeMetaRef::l_get_string(lua_State *L)
+{
+ NodeMetaRef *ref = checkobject(L, 1);
+ std::string name = luaL_checkstring(L, 2);
+
+ NodeMetadata *meta = getmeta(ref, false);
+ if(meta == NULL){
+ lua_pushlstring(L, "", 0);
+ return 1;
+ }
+ std::string str = meta->getString(name);
+ lua_pushlstring(L, str.c_str(), str.size());
+ return 1;
+}
+
+// set_string(self, name, var)
+int NodeMetaRef::l_set_string(lua_State *L)
+{
+ NodeMetaRef *ref = checkobject(L, 1);
+ std::string name = luaL_checkstring(L, 2);
+ size_t len = 0;
+ const char *s = lua_tolstring(L, 3, &len);
+ std::string str(s, len);
+
+ NodeMetadata *meta = getmeta(ref, !str.empty());
+ if(meta == NULL || str == meta->getString(name))
+ return 0;
+ meta->setString(name, str);
+ reportMetadataChange(ref);
+ return 0;
+}
+
+// get_int(self, name)
+int NodeMetaRef::l_get_int(lua_State *L)
+{
+ NodeMetaRef *ref = checkobject(L, 1);
+ std::string name = lua_tostring(L, 2);
+
+ NodeMetadata *meta = getmeta(ref, false);
+ if(meta == NULL){
+ lua_pushnumber(L, 0);
+ return 1;
+ }
+ std::string str = meta->getString(name);
+ lua_pushnumber(L, stoi(str));
+ return 1;
+}
+
+// set_int(self, name, var)
+int NodeMetaRef::l_set_int(lua_State *L)
+{
+ NodeMetaRef *ref = checkobject(L, 1);
+ std::string name = lua_tostring(L, 2);
+ int a = lua_tointeger(L, 3);
+ std::string str = itos(a);
+
+ NodeMetadata *meta = getmeta(ref, true);
+ if(meta == NULL || str == meta->getString(name))
+ return 0;
+ meta->setString(name, str);
+ reportMetadataChange(ref);
+ return 0;
+}
+
+// get_float(self, name)
+int NodeMetaRef::l_get_float(lua_State *L)
+{
+ NodeMetaRef *ref = checkobject(L, 1);
+ std::string name = lua_tostring(L, 2);
+
+ NodeMetadata *meta = getmeta(ref, false);
+ if(meta == NULL){
+ lua_pushnumber(L, 0);
+ return 1;
+ }
+ std::string str = meta->getString(name);
+ lua_pushnumber(L, stof(str));
+ return 1;
+}
+
+// set_float(self, name, var)
+int NodeMetaRef::l_set_float(lua_State *L)
+{
+ NodeMetaRef *ref = checkobject(L, 1);
+ std::string name = lua_tostring(L, 2);
+ float a = lua_tonumber(L, 3);
+ std::string str = ftos(a);
+
+ NodeMetadata *meta = getmeta(ref, true);
+ if(meta == NULL || str == meta->getString(name))
+ return 0;
+ meta->setString(name, str);
+ reportMetadataChange(ref);
+ return 0;
+}
+
+// get_inventory(self)
+int NodeMetaRef::l_get_inventory(lua_State *L)
+{
+ NodeMetaRef *ref = checkobject(L, 1);
+ getmeta(ref, true); // try to ensure the metadata exists
+ InvRef::createNodeMeta(L, ref->m_p);
+ return 1;
+}
+
+// to_table(self)
+int NodeMetaRef::l_to_table(lua_State *L)
+{
+ NodeMetaRef *ref = checkobject(L, 1);
+
+ NodeMetadata *meta = getmeta(ref, true);
+ if(meta == NULL){
+ lua_pushnil(L);
+ return 1;
+ }
+ lua_newtable(L);
+ // fields
+ lua_newtable(L);
+ {
+ std::map<std::string, std::string> fields = meta->getStrings();
+ for(std::map<std::string, std::string>::const_iterator
+ i = fields.begin(); i != fields.end(); i++){
+ const std::string &name = i->first;
+ const std::string &value = i->second;
+ lua_pushlstring(L, name.c_str(), name.size());
+ lua_pushlstring(L, value.c_str(), value.size());
+ lua_settable(L, -3);
+ }
+ }
+ lua_setfield(L, -2, "fields");
+ // inventory
+ lua_newtable(L);
+ Inventory *inv = meta->getInventory();
+ if(inv){
+ std::vector<const InventoryList*> lists = inv->getLists();
+ for(std::vector<const InventoryList*>::const_iterator
+ i = lists.begin(); i != lists.end(); i++){
+ push_inventory_list(inv, (*i)->getName().c_str(), L);
+ lua_setfield(L, -2, (*i)->getName().c_str());
+ }
+ }
+ lua_setfield(L, -2, "inventory");
+ return 1;
+}
+
+// from_table(self, table)
+int NodeMetaRef::l_from_table(lua_State *L)
+{
+ NodeMetaRef *ref = checkobject(L, 1);
+ int base = 2;
+
+ if(lua_isnil(L, base)){
+ // No metadata
+ ref->m_env->getMap().removeNodeMetadata(ref->m_p);
+ lua_pushboolean(L, true);
+ return 1;
+ }
+
+ // Has metadata; clear old one first
+ ref->m_env->getMap().removeNodeMetadata(ref->m_p);
+ // Create new metadata
+ NodeMetadata *meta = getmeta(ref, true);
+ // Set fields
+ lua_getfield(L, base, "fields");
+ int fieldstable = lua_gettop(L);
+ lua_pushnil(L);
+ while(lua_next(L, fieldstable) != 0){
+ // key at index -2 and value at index -1
+ std::string name = lua_tostring(L, -2);
+ size_t cl;
+ const char *cs = lua_tolstring(L, -1, &cl);
+ std::string value(cs, cl);
+ meta->setString(name, value);
+ lua_pop(L, 1); // removes value, keeps key for next iteration
+ }
+ // Set inventory
+ Inventory *inv = meta->getInventory();
+ lua_getfield(L, base, "inventory");
+ int inventorytable = lua_gettop(L);
+ lua_pushnil(L);
+ while(lua_next(L, inventorytable) != 0){
+ // key at index -2 and value at index -1
+ std::string name = lua_tostring(L, -2);
+ read_inventory_list(inv, name.c_str(), L, -1,STACK_TO_SERVER(L));
+ lua_pop(L, 1); // removes value, keeps key for next iteration
+ }
+ reportMetadataChange(ref);
+ lua_pushboolean(L, true);
+ return 1;
+}
+
+
+NodeMetaRef::NodeMetaRef(v3s16 p, ServerEnvironment *env):
+ m_p(p),
+ m_env(env)
+{
+}
+
+NodeMetaRef::~NodeMetaRef()
+{
+}
+
+// Creates an NodeMetaRef and leaves it on top of stack
+// Not callable from Lua; all references are created on the C side.
+void NodeMetaRef::create(lua_State *L, v3s16 p, ServerEnvironment *env)
+{
+ NodeMetaRef *o = new NodeMetaRef(p, env);
+ //infostream<<"NodeMetaRef::create: o="<<o<<std::endl;
+ *(void **)(lua_newuserdata(L, sizeof(void *))) = o;
+ luaL_getmetatable(L, className);
+ lua_setmetatable(L, -2);
+}
+
+void NodeMetaRef::Register(lua_State *L)
+{
+ lua_newtable(L);
+ int methodtable = lua_gettop(L);
+ luaL_newmetatable(L, className);
+ int metatable = lua_gettop(L);
+
+ lua_pushliteral(L, "__metatable");
+ lua_pushvalue(L, methodtable);
+ lua_settable(L, metatable); // hide metatable from Lua getmetatable()
+
+ lua_pushliteral(L, "__index");
+ lua_pushvalue(L, methodtable);
+ lua_settable(L, metatable);
+
+ lua_pushliteral(L, "__gc");
+ lua_pushcfunction(L, gc_object);
+ lua_settable(L, metatable);
+
+ lua_pop(L, 1); // drop metatable
+
+ luaL_openlib(L, 0, methods, 0); // fill methodtable
+ lua_pop(L, 1); // drop methodtable
+
+ // Cannot be created from Lua
+ //lua_register(L, className, create_object);
+}
+
+const char NodeMetaRef::className[] = "NodeMetaRef";
+const luaL_reg NodeMetaRef::methods[] = {
+ luamethod(NodeMetaRef, get_string),
+ luamethod(NodeMetaRef, set_string),
+ luamethod(NodeMetaRef, get_int),
+ luamethod(NodeMetaRef, set_int),
+ luamethod(NodeMetaRef, get_float),
+ luamethod(NodeMetaRef, set_float),
+ luamethod(NodeMetaRef, get_inventory),
+ luamethod(NodeMetaRef, to_table),
+ luamethod(NodeMetaRef, from_table),
+ {0,0}
+};
+
+REGISTER_LUA_REF(NodeMetaRef);