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-rw-r--r--src/scriptapi.cpp161
1 files changed, 151 insertions, 10 deletions
diff --git a/src/scriptapi.cpp b/src/scriptapi.cpp
index 3294ac57f..bf2868907 100644
--- a/src/scriptapi.cpp
+++ b/src/scriptapi.cpp
@@ -40,14 +40,12 @@ extern "C" {
#include "craftdef.h"
#include "main.h" // For g_settings
#include "settings.h" // For accessing g_settings
+#include "nodemetadata.h"
+#include "mapblock.h" // For getNodeBlockPos
/*
TODO:
-- Random node triggers (like grass growth)
- All kinds of callbacks
-- Object visual client-side stuff
- - Blink effect
- - Spritesheets and animation
- LuaNodeMetadata
blockdef.metadata_name =
""
@@ -62,7 +60,7 @@ TODO:
meta.set("owner", playername)
meta.get("owner")
- Item definition (actually, only CraftItem)
-- (not scripting) Putting items in node metadata (virtual)
+- Putting items in NodeMetadata (?)
*/
static void stackDump(lua_State *L, std::ostream &o)
@@ -584,6 +582,7 @@ static int l_register_abm(lua_State *L)
if(lua_isnil(L, -1))
break;
lua_pop(L, 1);
+ id++;
}
lua_pop(L, 1);
@@ -1038,10 +1037,135 @@ static void luaentity_get(lua_State *L, u16 id)
}
/*
- Reference objects
+ Reference wrappers
*/
+
#define method(class, name) {#name, class::l_##name}
+/*
+ NodeMetaRef
+*/
+
+class NodeMetaRef
+{
+private:
+ v3s16 m_p;
+ ServerEnvironment *m_env;
+
+ static const char className[];
+ static const luaL_reg methods[];
+
+ static 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
+ }
+
+ static NodeMetadata* getmeta(NodeMetaRef *ref)
+ {
+ NodeMetadata *meta = ref->m_env->getMap().getNodeMetadata(ref->m_p);
+ return meta;
+ }
+
+ static void reportMetadataChange(NodeMetaRef *ref)
+ {
+ // 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, "l_settext");
+ }
+
+ // Exported functions
+
+ // garbage collector
+ static int gc_object(lua_State *L) {
+ NodeMetaRef *o = *(NodeMetaRef **)(lua_touserdata(L, 1));
+ delete o;
+ return 0;
+ }
+
+ // settext(self, text)
+ static int l_settext(lua_State *L)
+ {
+ NodeMetaRef *ref = checkobject(L, 1);
+ NodeMetadata *meta = getmeta(ref);
+ if(meta == NULL) return 0;
+ // Do it
+ std::string text = lua_tostring(L, 2);
+ meta->setText(text);
+ // Inform other things that the metadata has changed
+ reportMetadataChange(ref);
+ return 0;
+ }
+
+public:
+ NodeMetaRef(v3s16 p, ServerEnvironment *env):
+ m_p(p),
+ m_env(env)
+ {
+ }
+
+ ~NodeMetaRef()
+ {
+ }
+
+ // Creates an NodeMetaRef and leaves it on top of stack
+ // Not callable from Lua; all references are created on the C side.
+ static void 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);
+ }
+
+ static void 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[] = {
+ method(NodeMetaRef, settext),
+ {0,0}
+};
+
+/*
+ EnvRef
+*/
+
class EnvRef
{
private:
@@ -1129,6 +1253,19 @@ private:
return 0;
}
+ // EnvRef:get_meta(pos)
+ static int l_get_meta(lua_State *L)
+ {
+ infostream<<"EnvRef::l_get_meta()"<<std::endl;
+ EnvRef *o = checkobject(L, 1);
+ ServerEnvironment *env = o->m_env;
+ if(env == NULL) return 0;
+ // Do it
+ v3s16 p = readpos(L, 2);
+ NodeMetaRef::create(L, p, env);
+ return 1;
+ }
+
static int gc_object(lua_State *L) {
EnvRef *o = *(EnvRef **)(lua_touserdata(L, 1));
delete o;
@@ -1198,9 +1335,14 @@ const luaL_reg EnvRef::methods[] = {
method(EnvRef, remove_node),
method(EnvRef, get_node),
method(EnvRef, add_luaentity),
+ method(EnvRef, get_meta),
{0,0}
};
+/*
+ ObjectRef
+*/
+
class ObjectRef
{
private:
@@ -1536,11 +1678,10 @@ void scriptapi_export(lua_State *L, Server *server)
// Put functions in metatable
luaL_register(L, NULL, minetest_entity_m);
// Put other stuff in metatable
-
- // Environment C reference
+
+ // Register reference wrappers
+ NodeMetaRef::Register(L);
EnvRef::Register(L);
-
- // Object C reference
ObjectRef::Register(L);
}