Enable autoload in editor

- Tool scripts will be executed and can be accessed by plugins.
- Other script languages can implement add/remove_named_global_constant
to make use of this functionality.

6 files changed, 65 insertions, 2 deletions

diff --git a/modules/gdscript/gdscript.cpp b/modules/gdscript/gdscript.cpp
index 4e3ee4d22c..14bdce50ec 100644
--- a/modules/gdscript/gdscript.cpp
+++ b/modules/gdscript/gdscript.cpp
@@ -1333,6 +1333,15 @@ void GDScriptLanguage::add_global_constant(const StringName &p_variable, const V
 	_add_global(p_variable, p_value);
 }
 
+void GDScriptLanguage::add_named_global_constant(const StringName &p_name, const Variant &p_value) {
+	named_globals[p_name] = p_value;
+}
+
+void GDScriptLanguage::remove_named_global_constant(const StringName &p_name) {
+	ERR_FAIL_COND(!named_globals.has(p_name));
+	named_globals.erase(p_name);
+}
+
 void GDScriptLanguage::init() {
 
 	//populate global constants
diff --git a/modules/gdscript/gdscript.h b/modules/gdscript/gdscript.h
index 9566e3b32e..6885fbb7fe 100644
--- a/modules/gdscript/gdscript.h
+++ b/modules/gdscript/gdscript.h
@@ -262,6 +262,7 @@ class GDScriptLanguage : public ScriptLanguage {
 	Variant *_global_array;
 	Vector<Variant> global_array;
 	Map<StringName, int> globals;
+	Map<StringName, Variant> named_globals;
 
 	struct CallLevel {
 
@@ -369,7 +370,8 @@ public:
 
 	_FORCE_INLINE_ int get_global_array_size() const { return global_array.size(); }
 	_FORCE_INLINE_ Variant *get_global_array() { return _global_array; }
-	_FORCE_INLINE_ const Map<StringName, int> &get_global_map() { return globals; }
+	_FORCE_INLINE_ const Map<StringName, int> &get_global_map() const { return globals; }
+	_FORCE_INLINE_ const Map<StringName, Variant> &get_named_globals_map() const { return named_globals; }
 
 	_FORCE_INLINE_ static GDScriptLanguage *get_singleton() { return singleton; }
 
@@ -403,6 +405,8 @@ public:
 	virtual String _get_indentation() const;
 	virtual void auto_indent_code(String &p_code, int p_from_line, int p_to_line) const;
 	virtual void add_global_constant(const StringName &p_variable, const Variant &p_value);
+	virtual void add_named_global_constant(const StringName &p_name, const Variant &p_value);
+	virtual void remove_named_global_constant(const StringName &p_name);
 
 	/* DEBUGGER FUNCTIONS */
 
diff --git a/modules/gdscript/gdscript_compiler.cpp b/modules/gdscript/gdscript_compiler.cpp
index 048948dada..9947512444 100644
--- a/modules/gdscript/gdscript_compiler.cpp
+++ b/modules/gdscript/gdscript_compiler.cpp
@@ -278,6 +278,18 @@ int GDScriptCompiler::_parse_expression(CodeGen &codegen, const GDScriptParser::
 				return idx | (GDScriptFunction::ADDR_TYPE_GLOBAL << GDScriptFunction::ADDR_BITS); //argument (stack root)
 			}
 
+#ifdef TOOLS_ENABLED
+			if (GDScriptLanguage::get_singleton()->get_named_globals_map().has(identifier)) {
+
+				int idx = codegen.named_globals.find(identifier);
+				if (idx == -1) {
+					idx = codegen.named_globals.size();
+					codegen.named_globals.push_back(identifier);
+				}
+				return idx | (GDScriptFunction::ADDR_TYPE_NAMED_GLOBAL << GDScriptFunction::ADDR_BITS);
+			}
+#endif
+
 			//not found, error
 
 			_set_error("Identifier not found: " + String(identifier), p_expression);
@@ -1511,6 +1523,18 @@ Error GDScriptCompiler::_parse_function(GDScript *p_script, const GDScriptParser
 		gdfunc->_global_names_count = 0;
 	}
 
+#ifdef TOOLS_ENABLED
+	// Named globals
+	if (codegen.named_globals.size()) {
+		gdfunc->named_globals.resize(codegen.named_globals.size());
+		gdfunc->_named_globals_ptr = gdfunc->named_globals.ptr();
+		for (int i = 0; i < codegen.named_globals.size(); i++) {
+			gdfunc->named_globals[i] = codegen.named_globals[i];
+		}
+		gdfunc->_named_globals_count = gdfunc->named_globals.size();
+	}
+#endif
+
 	if (codegen.opcodes.size()) {
 
 		gdfunc->code = codegen.opcodes;
diff --git a/modules/gdscript/gdscript_compiler.h b/modules/gdscript/gdscript_compiler.h
index 62aafdbe01..237b0de9e7 100644
--- a/modules/gdscript/gdscript_compiler.h
+++ b/modules/gdscript/gdscript_compiler.h
@@ -94,6 +94,9 @@ class GDScriptCompiler {
 
 		HashMap<Variant, int, VariantHasher, VariantComparator> constant_map;
 		Map<StringName, int> name_map;
+#ifdef TOOLS_ENABLED
+		Vector<StringName> named_globals;
+#endif
 
 		int get_name_map_pos(const StringName &p_identifier) {
 			int ret;
diff --git a/modules/gdscript/gdscript_function.cpp b/modules/gdscript/gdscript_function.cpp
index d32ce25d3c..62394c8c43 100644
--- a/modules/gdscript/gdscript_function.cpp
+++ b/modules/gdscript/gdscript_function.cpp
@@ -108,6 +108,21 @@ Variant *GDScriptFunction::_get_variant(int p_address, GDScriptInstance *p_insta
 #endif
 			return &GDScriptLanguage::get_singleton()->get_global_array()[address];
 		} break;
+#ifdef TOOLS_ENABLED
+		case ADDR_TYPE_NAMED_GLOBAL: {
+#ifdef DEBUG_ENABLED
+			ERR_FAIL_INDEX_V(address, _named_globals_count, NULL);
+#endif
+			StringName id = _named_globals_ptr[address];
+
+			if (GDScriptLanguage::get_singleton()->get_named_globals_map().has(id)) {
+				return (Variant *)&GDScriptLanguage::get_singleton()->get_named_globals_map()[id];
+			} else {
+				r_error = "Autoload singleton '" + String(id) + "' has been removed.";
+				return NULL;
+			}
+		} break;
+#endif
 		case ADDR_TYPE_NIL: {
 			return &nil;
 		} break;
diff --git a/modules/gdscript/gdscript_function.h b/modules/gdscript/gdscript_function.h
index dff4bdfaf2..ea009dcd96 100644
--- a/modules/gdscript/gdscript_function.h
+++ b/modules/gdscript/gdscript_function.h
@@ -92,7 +92,8 @@ public:
 		ADDR_TYPE_STACK = 5,
 		ADDR_TYPE_STACK_VARIABLE = 6,
 		ADDR_TYPE_GLOBAL = 7,
-		ADDR_TYPE_NIL = 8
+		ADDR_TYPE_NAMED_GLOBAL = 8,
+		ADDR_TYPE_NIL = 9
 	};
 
 	enum RPCMode {
@@ -121,6 +122,10 @@ private:
 	int _constant_count;
 	const StringName *_global_names_ptr;
 	int _global_names_count;
+#ifdef TOOLS_ENABLED
+	const StringName *_named_globals_ptr;
+	int _named_globals_count;
+#endif
 	const int *_default_arg_ptr;
 	int _default_arg_count;
 	const int *_code_ptr;
@@ -137,6 +142,9 @@ private:
 	StringName name;
 	Vector<Variant> constants;
 	Vector<StringName> global_names;
+#ifdef TOOLS_ENABLED
+	Vector<StringName> named_globals;
+#endif
 	Vector<int> default_arguments;
 	Vector<int> code;