From edc249647461201db3b3c62cae667521e3a03ee8 Mon Sep 17 00:00:00 2001
From: Karroffel <therzog@mail.de>
Date: Sat, 4 Mar 2017 18:08:44 +0100
Subject: [PATCH] added proper singleton suport

---
 binding_generator/src/main.rs | 61 ++++++++++++++++++++++++++++++++---
 1 file changed, 57 insertions(+), 4 deletions(-)

diff --git a/binding_generator/src/main.rs b/binding_generator/src/main.rs
index 836e398..f30b448 100644
--- a/binding_generator/src/main.rs
+++ b/binding_generator/src/main.rs
@@ -92,6 +92,20 @@ fn generate_class_content(forward_declares: &String, class: &GodotClass) -> Stri
 
 	contents += forward_declares;
 
+	let core_obj_name = {
+		let mut name = String::new();
+		if class.singleton {
+			name = name + "___static_object_" + strip_name(&class.name);
+		} else {
+			name = name + "__core_object";
+		};
+		name
+	};
+
+	if class.singleton {
+		contents = contents + "\n\nstatic godot_object *" + core_obj_name.as_str() + ";\n\n";
+	}
+
 	contents = contents + "\n\n\nclass " + strip_name(&class.name);
 
 	if class.base_class != "" {
@@ -101,7 +115,13 @@ fn generate_class_content(forward_declares: &String, class: &GodotClass) -> Stri
 	contents = contents + " {\n";
 
 	if class.base_class == "" {
-		contents = contents + "protected:\n\tgodot_object *__core_object;\n\n";
+		contents = contents + "protected:\n\tgodot_object *__core_object = 0;\n\n";
+	}
+
+	if class.singleton {
+		contents = contents + "private:\n";
+		contents = contents + "\tstatic void ___singleton_init() { "
+			+ core_obj_name.as_str() + " = godot_global_get_singleton(\"" + strip_name(&class.name) + "\"); }\n\n";
 	}
 
 	contents = contents + "public:\n\n";
@@ -111,7 +131,7 @@ fn generate_class_content(forward_declares: &String, class: &GodotClass) -> Stri
 	{
 		contents = contents + "\t" + strip_name(&class.name) + "() {\n";
 		contents = contents + "\t\t\n";
-		contents = contents + "\t}\n";
+		contents = contents + "\t}\n\n";
 	}
 
 
@@ -122,6 +142,11 @@ fn generate_class_content(forward_declares: &String, class: &GodotClass) -> Stri
 		contents = contents + "\t}\n\n\n";
 	}
 
+	if class.instanciable {
+		contents = contents + "\tstatic " + strip_name(&class.name) + "& _new();\n";
+		contents = contents + "\tvoid _destroy();\n\n";
+	}
+
 	for (name, value) in &class.constants {
 		contents = contents + "\tconst static int " + name.as_str() + " = " + value.as_i64().unwrap().to_string().as_str() + ";\n";
 	}
@@ -129,7 +154,7 @@ fn generate_class_content(forward_declares: &String, class: &GodotClass) -> Stri
 	contents += "\n\n";
 
 	for method in &class.methods {
-		contents = contents + "\t" + strip_name(&method.return_type) + (if !is_core_type(&method.return_type) && !is_primitive(&method.return_type) { " &" } else { " " }) + method.name.as_str() + "(";
+		contents = contents + "\t" + (if class.singleton { "static " } else { "" }) + strip_name(&method.return_type) + (if !is_core_type(&method.return_type) && !is_primitive(&method.return_type) { " &" } else { " " }) + method.name.as_str() + "(";
 
 		for (i, argument) in (&method.arguments).iter().enumerate() {
 			if !is_primitive(&argument._type) {
@@ -146,6 +171,12 @@ fn generate_class_content(forward_declares: &String, class: &GodotClass) -> Stri
 
 		contents = contents + ") {\n";
 
+		if class.singleton {
+			contents = contents + "\t\tif (" + core_obj_name.as_str() + " == 0) {\n";
+			contents = contents + "\t\t\t___singleton_init();\n";
+			contents = contents + "\t\t}\n\n";
+		}
+
 		contents = contents + "\t\tstatic godot_method_bind *mb = NULL;\n"
 		                    + "\t\tif (mb == NULL) {\n"
 		                    + "\t\t\tmb = godot_method_bind_get_method(\"" + class.name.as_str() + "\", \"" + method.name.as_str() + "\");\n"
@@ -172,7 +203,7 @@ fn generate_class_content(forward_declares: &String, class: &GodotClass) -> Stri
 
 		contents = contents + "\t\t};\n";
 
-		contents = contents + "\t\tgodot_method_bind_ptrcall(mb, __core_object, args, " + if method.return_type == "void" { "NULL" } else { "&ret" } + ");\n";
+		contents = contents + "\t\tgodot_method_bind_ptrcall(mb, " + core_obj_name.as_str() + ", args, " + if method.return_type == "void" { "NULL" } else { "&ret" } + ");\n";
 
 		if !is_primitive(&method.return_type) && !is_core_type(&method.return_type) {
 			contents = contents + "\t\treturn reinterpret_cast<" + strip_name(&method.return_type) + "&>(ret);\n";
@@ -187,6 +218,28 @@ fn generate_class_content(forward_declares: &String, class: &GodotClass) -> Stri
 
 	contents = contents + "}\n";
 
+
+
+	if class.instanciable {
+
+		contents = contents + "#include \"ClassDB.h\"\n";
+
+		contents = contents + "namespace godot {\n\n";
+
+		contents = contents + "" + strip_name(&class.name) + "& " + strip_name(&class.name) + "::_new() {\n";
+		contents = contents + "\tObject *ptr = ClassDB::instance(\"" + class.name.as_str() + "\");\n";
+		contents = contents + "\treturn reinterpret_cast<" + strip_name(&class.name) + "&>(ptr);";
+		contents = contents + "}\n\n";
+
+		contents = contents + "void " + strip_name(&class.name) + "::_destroy() {\n";
+		contents = contents + "\tgodot_object_destroy(__core_object);\n";
+		contents = contents + "}\n\n\n";
+
+		contents = contents + "}\n";
+	}
+
+
+
 	contents = contents + "#endif\n";
 
 	contents