-variables with export in script are now IMMEDIATELY AND ALWAYS visible in properties (#718)

-WorldEnvironment cleanup issues fixed (#563)
-Text Editor improvement to shift-mouse selection (#648)
-(Hopefully) fixed rare (but horrible) indexing bug in GDScript compiler (#652)
-Some changes to PhysicsBody API, renamed property "active" to "sleeping", which makes more sense
-Added add_collision_exception() API in PhysicsBody (more accessible)
-ability to select and copy in the output messages panel

modules/gdscript/gd_compiler.cpp

@@ -724,6 +724,8 @@ int GDCompiler::_parse_expression(CodeGen& codegen,const GDParser::Node *p_expre
 							return prev_pos;
 						int retval=prev_pos;
 
+						//print_line("retval: "+itos(retval));
+
 						if (retval&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
 							slevel++;
 							codegen.alloc_stack(slevel);
@@ -732,6 +734,8 @@ int GDCompiler::_parse_expression(CodeGen& codegen,const GDParser::Node *p_expre
 
 						Vector<int> setchain;
 
+						int prev_key_idx=-1;
+
 						for(List<GDParser::OperatorNode*>::Element *E=chain.back();E;E=E->prev()) {
 
 
@@ -743,16 +747,23 @@ int GDCompiler::_parse_expression(CodeGen& codegen,const GDParser::Node *p_expre
 
 							if (named) {
 
-								key_idx = codegen.get_name_map_pos(static_cast<const GDParser::IdentifierNode*>(E->get()->arguments[1])->name);
+								key_idx = codegen.get_name_map_pos(static_cast<const GDParser::IdentifierNode*>(E->get()->arguments[1])->name);								
+								//printf("named key %x\n",key_idx);
+
 							} else {
 
-								GDParser::Node *key = E->get()->arguments[1];
-								key_idx = _parse_expression(codegen,key,slevel);
-								if (retval&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
+								if (prev_pos&(GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS)) {
 									slevel++;
 									codegen.alloc_stack(slevel);
 								}
 
+								GDParser::Node *key = E->get()->arguments[1];
+								key_idx = _parse_expression(codegen,key,slevel);
+								//printf("expr key %x\n",key_idx);
+
+
+								//stack was raised here if retval was stack but..
+
 							}
 
 							if (key_idx<0)
@@ -764,6 +775,7 @@ int GDCompiler::_parse_expression(CodeGen& codegen,const GDParser::Node *p_expre
 							slevel++;
 							codegen.alloc_stack(slevel);
 							int dst_pos = (GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS)|slevel;
+
 							codegen.opcodes.push_back(dst_pos);
 
 							//add in reverse order, since it will be reverted
@@ -773,6 +785,7 @@ int GDCompiler::_parse_expression(CodeGen& codegen,const GDParser::Node *p_expre
 							setchain.push_back(named ? GDFunction::OPCODE_SET_NAMED : GDFunction::OPCODE_SET);
 
 							prev_pos=dst_pos;
+							prev_key_idx=key_idx;
 
 						}
 

modules/gdscript/gd_script.cpp

@@ -1492,7 +1492,9 @@ Variant GDScript::_new(const Variant** p_args,int p_argcount,Variant::CallError&
 
 bool GDScript::can_instance() const {
 
-	return valid; //any script in GDscript can instance
+	//return valid; //any script in GDscript can instance
+	return valid || (!tool && !ScriptServer::is_scripting_enabled());
+
 }
 
 StringName GDScript::get_instance_base_type() const {
@@ -1565,8 +1567,10 @@ void GDScript::_update_placeholder(PlaceHolderScriptInstance *p_placeholder) {
 #endif
 ScriptInstance* GDScript::instance_create(Object *p_this) {
 
+
 	if (!tool && !ScriptServer::is_scripting_enabled()) {
 
+
 #ifdef TOOLS_ENABLED
 
 		//instance a fake script for editing the values
@@ -1620,7 +1624,48 @@ String GDScript::get_source_code() const {
 void GDScript::set_source_code(const String& p_code) {
 
 	source=p_code;
+}
 
+void GDScript::update_exports() {
+
+#ifdef TOOLS_ENABLED
+	String basedir=path;
+
+	if (basedir=="")
+		basedir=get_path();
+
+	if (basedir!="")
+		basedir=basedir.get_base_dir();
+
+	GDParser parser;
+	Error err = parser.parse(source,basedir,true);
+	if (err)
+		return; //do none
+
+	const GDParser::Node* root = parser.get_parse_tree();
+	ERR_FAIL_COND(root->type!=GDParser::Node::TYPE_CLASS);
+
+	const GDParser::ClassNode *c = static_cast<const GDParser::ClassNode*>(root);
+
+	List<PropertyInfo> plist;
+
+	Map<StringName,Variant> default_values;
+
+	for(int i=0;i<c->variables.size();i++) {
+		if (c->variables[i]._export.type==Variant::NIL)
+			continue;
+
+		plist.push_back(c->variables[i]._export);
+		default_values[c->variables[i].identifier]=c->variables[i].default_value;
+	}
+
+
+	for (Set<PlaceHolderScriptInstance*>::Element *E=placeholders.front();E;E=E->next()) {
+
+		E->get()->update(plist,default_values);
+	}
+
+#endif
 }
 
 void GDScript::_set_subclass_path(Ref<GDScript>& p_sc,const String& p_path) {

modules/gdscript/gd_script.h

@@ -299,6 +299,8 @@ public:
 	virtual bool has_source_code() const;
 	virtual String get_source_code() const;
 	virtual void set_source_code(const String& p_code);
+	virtual void update_exports();
+
 	virtual Error reload();
 
 	virtual String get_node_type() const;