Refactor electric sabers

tools/tool.lua

@@ -15,6 +15,9 @@
 -- along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 industrialtest.Tool=table.copy(industrialtest.Item)
+industrialtest.internal.unpackTableInto(industrialtest.Tool,{
+	define={}
+})
 
 function industrialtest.Tool.use(self,itemstack,user,pointed)
 	-- dummy function
@@ -22,6 +25,7 @@ function industrialtest.Tool.use(self,itemstack,user,pointed)
 end
 
 function industrialtest.Tool.hitUse(self,itemstack,user,pointed)
+	-- Note: this method, when used, onUse must be set in define table
 	-- dummy function
 	return false
 end
@@ -59,17 +63,21 @@ function industrialtest.Tool.createDefinitionTable(self)
 	def.tool_capabilities={
 		uses=self.uses
 	}
-	def.on_place=function(itemstack,user,pointed)
-		if self:onPlace(itemstack,user,pointed) then
-			return itemstack
+	if self.define.onPlace then
+		def.on_place=function(itemstack,user,pointed)
+			if self:onPlace(itemstack,user,pointed) then
+				return itemstack
+			end
+			return nil
 		end
-		return nil
 	end
-	def.on_use=function(itemstack,user,pointed)
-		if self:onUse(itemstack,user,pointed) then
-			return itemstack
+	if self.define.onUse then
+		def.on_use=function(itemstack,user,pointed)
+			if self:onUse(itemstack,user,pointed) then
+				return itemstack
+			end
+			return nil
 		end
-		return nil
 	end
 
 	if industrialtest.mclAvailable then