Add default values to the editor help, docs, and generated RST

Also, make spacing of "=" in the editor help a bit more consistent.
Closes #16086

21 files changed, 233 insertions, 81 deletions

diff --git a/core/class_db.cpp b/core/class_db.cpp
index c9527e3c8f..34bc83c89a 100644
--- a/core/class_db.cpp
+++ b/core/class_db.cpp
@@ -545,6 +545,11 @@ bool ClassDB::can_instance(const StringName &p_class) {
 
 	ClassInfo *ti = classes.getptr(p_class);
 	ERR_FAIL_COND_V(!ti, false);
+#ifdef TOOLS_ENABLED
+	if (ti->api == API_EDITOR && !Engine::get_singleton()->is_editor_hint()) {
+		return false;
+	}
+#endif
 	return (!ti->disabled && ti->creation_func != NULL);
 }
 
@@ -980,6 +985,13 @@ void ClassDB::add_property(StringName p_class, const PropertyInfo &p_pinfo, cons
 	type->property_setget[p_pinfo.name] = psg;
 }
 
+void ClassDB::set_property_default_value(StringName p_class, const StringName &p_name, const Variant &p_default) {
+	if (!default_values.has(p_class)) {
+		default_values[p_class] = HashMap<StringName, Variant>();
+	}
+	default_values[p_class][p_name] = p_default;
+}
+
 void ClassDB::get_property_list(StringName p_class, List<PropertyInfo> *p_list, bool p_no_inheritance, const Object *p_validator) {
 
 	OBJTYPE_RLOCK;
@@ -1383,27 +1395,47 @@ void ClassDB::get_extensions_for_type(const StringName &p_class, List<String> *p
 }
 
 HashMap<StringName, HashMap<StringName, Variant> > ClassDB::default_values;
+Set<StringName> ClassDB::default_values_cached;
 
 Variant ClassDB::class_get_default_property_value(const StringName &p_class, const StringName &p_property) {
 
-	if (!default_values.has(p_class)) {
+	if (!default_values_cached.has(p_class)) {
 
-		default_values[p_class] = HashMap<StringName, Variant>();
+		if (!default_values.has(p_class)) {
+			default_values[p_class] = HashMap<StringName, Variant>();
+		}
 
-		if (ClassDB::can_instance(p_class)) {
+		Object *c = NULL;
+		bool cleanup_c = false;
+
+		if (Engine::get_singleton()->has_singleton(p_class)) {
+			c = Engine::get_singleton()->get_singleton_object(p_class);
+			cleanup_c = false;
+		} else if (ClassDB::can_instance(p_class)) {
+			c = ClassDB::instance(p_class);
+			cleanup_c = true;
+		}
+
+		if (c) {
 
-			Object *c = ClassDB::instance(p_class);
 			List<PropertyInfo> plist;
 			c->get_property_list(&plist);
 			for (List<PropertyInfo>::Element *E = plist.front(); E; E = E->next()) {
 				if (E->get().usage & (PROPERTY_USAGE_STORAGE | PROPERTY_USAGE_EDITOR)) {
 
-					Variant v = c->get(E->get().name);
-					default_values[p_class][E->get().name] = v;
+					if (!default_values[p_class].has(E->get().name)) {
+						Variant v = c->get(E->get().name);
+						default_values[p_class][E->get().name] = v;
+					}
 				}
 			}
-			memdelete(c);
+
+			if (cleanup_c) {
+				memdelete(c);
+			}
 		}
+
+		default_values_cached.insert(p_class);
 	}
 
 	if (!default_values.has(p_class)) {
@@ -1424,6 +1456,12 @@ void ClassDB::init() {
 	lock = RWLock::create();
 }
 
+void ClassDB::cleanup_defaults() {
+
+	default_values.clear();
+	default_values_cached.clear();
+}
+
 void ClassDB::cleanup() {
 
 	//OBJTYPE_LOCK; hah not here
@@ -1443,7 +1481,6 @@ void ClassDB::cleanup() {
 	classes.clear();
 	resource_base_extensions.clear();
 	compat_classes.clear();
-	default_values.clear();
 
 	memdelete(lock);
 }
diff --git a/core/class_db.h b/core/class_db.h
index efa1a46866..8adbc9ba98 100644
--- a/core/class_db.h
+++ b/core/class_db.h
@@ -162,6 +162,7 @@ public:
 	static void _add_class2(const StringName &p_class, const StringName &p_inherits);
 
 	static HashMap<StringName, HashMap<StringName, Variant> > default_values;
+	static Set<StringName> default_values_cached;
 
 public:
 	// DO NOT USE THIS!!!!!! NEEDS TO BE PUBLIC BUT DO NOT USE NO MATTER WHAT!!!
@@ -329,6 +330,7 @@ public:
 
 	static void add_property_group(StringName p_class, const String &p_name, const String &p_prefix = "");
 	static void add_property(StringName p_class, const PropertyInfo &p_pinfo, const StringName &p_setter, const StringName &p_getter, int p_index = -1);
+	static void set_property_default_value(StringName p_class, const StringName &p_name, const Variant &p_default);
 	static void get_property_list(StringName p_class, List<PropertyInfo> *p_list, bool p_no_inheritance = false, const Object *p_validator = NULL);
 	static bool set_property(Object *p_object, const StringName &p_property, const Variant &p_value, bool *r_valid = NULL);
 	static bool get_property(Object *p_object, const StringName &p_property, Variant &r_value);
@@ -373,6 +375,7 @@ public:
 
 	static void set_current_api(APIType p_api);
 	static APIType get_current_api();
+	static void cleanup_defaults();
 	static void cleanup();
 };
 
diff --git a/core/io/multiplayer_api.cpp b/core/io/multiplayer_api.cpp
index 2779837190..33dc4dbde4 100644
--- a/core/io/multiplayer_api.cpp
+++ b/core/io/multiplayer_api.cpp
@@ -874,6 +874,7 @@ void MultiplayerAPI::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "allow_object_decoding"), "set_allow_object_decoding", "is_object_decoding_allowed");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "refuse_new_network_connections"), "set_refuse_new_network_connections", "is_refusing_new_network_connections");
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "network_peer", PROPERTY_HINT_RESOURCE_TYPE, "NetworkedMultiplayerPeer", 0), "set_network_peer", "get_network_peer");
+	ADD_PROPERTY_DEFAULT("refuse_new_network_connections", false);
 
 	ADD_SIGNAL(MethodInfo("network_peer_connected", PropertyInfo(Variant::INT, "id")));
 	ADD_SIGNAL(MethodInfo("network_peer_disconnected", PropertyInfo(Variant::INT, "id")));
diff --git a/core/object.h b/core/object.h
index 4394c1c3da..1e0b22c086 100644
--- a/core/object.h
+++ b/core/object.h
@@ -130,6 +130,7 @@ enum PropertyUsageFlags {
 #define ADD_SIGNAL(m_signal) ClassDB::add_signal(get_class_static(), m_signal)
 #define ADD_PROPERTY(m_property, m_setter, m_getter) ClassDB::add_property(get_class_static(), m_property, _scs_create(m_setter), _scs_create(m_getter))
 #define ADD_PROPERTYI(m_property, m_setter, m_getter, m_index) ClassDB::add_property(get_class_static(), m_property, _scs_create(m_setter), _scs_create(m_getter), m_index)
+#define ADD_PROPERTY_DEFAULT(m_property, m_default) ClassDB::set_property_default_value(get_class_static(), m_property, m_default)
 #define ADD_GROUP(m_name, m_prefix) ClassDB::add_property_group(get_class_static(), m_name, m_prefix)
 
 struct PropertyInfo {
diff --git a/core/register_core_types.cpp b/core/register_core_types.cpp
index 135df4e5bd..af863dd385 100644
--- a/core/register_core_types.cpp
+++ b/core/register_core_types.cpp
@@ -273,6 +273,7 @@ void unregister_core_types() {
 
 	ResourceLoader::finalize();
 
+	ClassDB::cleanup_defaults();
 	ObjectDB::cleanup();
 
 	unregister_variant_methods();
diff --git a/doc/tools/makerst.py b/doc/tools/makerst.py
index 454c71d3c7..763c29ab4e 100755
--- a/doc/tools/makerst.py
+++ b/doc/tools/makerst.py
@@ -37,12 +37,13 @@ class TypeName:
 
 
 class PropertyDef:
-    def __init__(self, name, type_name, setter, getter, text):  # type: (str, TypeName, Optional[str], Optional[str], Optional[str]) -> None
+    def __init__(self, name, type_name, setter, getter, text, default_value):  # type: (str, TypeName, Optional[str], Optional[str], Optional[str], Optional[str]) -> None
         self.name = name
         self.type_name = type_name
         self.setter = setter
         self.getter = getter
         self.text = text
+        self.default_value = default_value
 
 class ParameterDef:
     def __init__(self, name, type_name, default_value):  # type: (str, TypeName, Optional[str]) -> None
@@ -81,9 +82,10 @@ class EnumDef:
 
 
 class ThemeItemDef:
-    def __init__(self, name, type_name):  # type: (str, TypeName) -> None
+    def __init__(self, name, type_name, default_value):  # type: (str, TypeName, Optional[str]) -> None
         self.name = name
         self.type_name = type_name
+        self.default_value = default_value
 
 
 class ClassDef:
@@ -144,8 +146,9 @@ class State:
                 type_name = TypeName.from_element(property)
                 setter = property.get("setter") or None  # Use or None so '' gets turned into None.
                 getter = property.get("getter") or None
+                default_value = property.get("default") or None
 
-                property_def = PropertyDef(property_name, type_name, setter, getter, property.text)
+                property_def = PropertyDef(property_name, type_name, setter, getter, property.text, default_value)
                 class_def.properties[property_name] = property_def
 
         methods = class_root.find("methods")
@@ -230,7 +233,8 @@ class State:
                 assert theme_item.tag == "theme_item"
 
                 theme_item_name = theme_item.attrib["name"]
-                theme_item_def = ThemeItemDef(theme_item_name, TypeName.from_element(theme_item))
+                default_value = theme_item.get("default") or None
+                theme_item_def = ThemeItemDef(theme_item_name, TypeName.from_element(theme_item), default_value)
                 if theme_item_name not in class_def.theme_items:
                     class_def.theme_items[theme_item_name] = []
                 class_def.theme_items[theme_item_name].append(theme_item_def)
@@ -400,8 +404,9 @@ def make_rst_class(class_def, state, dry_run, output_dir):  # type: (ClassDef, S
         for property_def in class_def.properties.values():
             type_rst = property_def.type_name.to_rst(state)
             ref = ":ref:`{0}<class_{1}_property_{0}>`".format(property_def.name, class_name)
-            ml.append((type_rst, ref))
-        format_table(f, ml)
+            default = property_def.default_value
+            ml.append((type_rst, ref, default))
+        format_table(f, ml, True)
 
     # Methods overview
     if len(class_def.methods) > 0:
@@ -415,11 +420,11 @@ def make_rst_class(class_def, state, dry_run, output_dir):  # type: (ClassDef, S
     # Theme properties
     if class_def.theme_items is not None and len(class_def.theme_items) > 0:
         f.write(make_heading('Theme Properties', '-'))
-        ml = []
+        pl = []
         for theme_item_list in class_def.theme_items.values():
             for theme_item in theme_item_list:
-                ml.append((theme_item.type_name.to_rst(state), theme_item.name))
-        format_table(f, ml)
+                pl.append((theme_item.type_name.to_rst(state), theme_item.name, theme_item.default_value))
+        format_table(f, pl, True)
 
     # Signals
     if len(class_def.signals) > 0:
@@ -488,14 +493,16 @@ def make_rst_class(class_def, state, dry_run, output_dir):  # type: (ClassDef, S
             f.write(".. _class_{}_property_{}:\n\n".format(class_name, property_def.name))
             f.write('- {} **{}**\n\n'.format(property_def.type_name.to_rst(state), property_def.name))
 
-            setget = []
+            info = []
+            if property_def.default_value is not None:
+                info.append(("*Default*", property_def.default_value))
             if property_def.setter is not None and not property_def.setter.startswith("_"):
-                setget.append(("*Setter*", property_def.setter + '(value)'))
+                info.append(("*Setter*", property_def.setter + '(value)'))
             if property_def.getter is not None and not property_def.getter.startswith("_"):
-                setget.append(('*Getter*', property_def.getter + '()'))
+                info.append(('*Getter*', property_def.getter + '()'))
 
-            if len(setget) > 0:
-                format_table(f, setget)
+            if len(info) > 0:
+                format_table(f, info)
 
             if property_def.text is not None and property_def.text.strip() != '':
                 f.write(rstize_text(property_def.text.strip(), state))
@@ -873,33 +880,33 @@ def rstize_text(text, state):  # type: (str, State) -> str
     return text
 
 
-def format_table(f, pp):  # type: (TextIO, Iterable[Tuple[str, ...]]) -> None
-    longest_t = 0
-    longest_s = 0
-    for s in pp:
-        sl = len(s[0])
-        if sl > longest_s:
-            longest_s = sl
-        tl = len(s[1])
-        if tl > longest_t:
-            longest_t = tl
-
-    sep = "+"
-    for i in range(longest_s + 2):
-        sep += "-"
-    sep += "+"
-    for i in range(longest_t + 2):
-        sep += "-"
+def format_table(f, data, remove_empty_columns=False):  # type: (TextIO, Iterable[Tuple[str, ...]]) -> None
+    if len(data) == 0:
+        return
+    
+    column_sizes = [0] * len(data[0])
+    for row in data:
+        for i, text in enumerate(row):
+            text_length = len(text or '')
+            if text_length > column_sizes[i]:
+                column_sizes[i] = text_length
+
+    sep = ""
+    for size in column_sizes:
+        if size == 0 and remove_empty_columns:
+            continue
+        sep += "+" + "-" * (size + 2)
     sep += "+\n"
     f.write(sep)
-    for s in pp:
-        rt = s[0]
-        while len(rt) < longest_s:
-            rt += " "
-        st = s[1]
-        while len(st) < longest_t:
-            st += " "
-        f.write("| " + rt + " | " + st + " |\n")
+    
+    for row in data:
+        row_text = "|"
+        for i, text in enumerate(row):
+            if column_sizes[i] == 0 and remove_empty_columns:
+                continue
+            row_text += " " + (text or '').ljust(column_sizes[i]) + " |"
+        row_text += "\n"
+        f.write(row_text)
         f.write(sep)
     f.write('\n')
 
diff --git a/editor/doc/doc_data.cpp b/editor/doc/doc_data.cpp
index 041f81d063..468819151f 100644
--- a/editor/doc/doc_data.cpp
+++ b/editor/doc/doc_data.cpp
@@ -248,6 +248,21 @@ void DocData::generate(bool p_basic_types) {
 			prop.setter = setter;
 			prop.getter = getter;
 
+			if (ClassDB::can_instance(name)) { // Cannot get default value of classes that can't be instanced
+				Variant default_value = ClassDB::class_get_default_property_value(name, E->get().name);
+				prop.default_value = default_value.get_construct_string();
+			} else {
+				List<StringName> inheriting_classes;
+				ClassDB::get_direct_inheriters_from_class(name, &inheriting_classes);
+				for (List<StringName>::Element *E2 = inheriting_classes.front(); E2; E2 = E2->next()) {
+					if (ClassDB::can_instance(E2->get())) {
+						Variant default_value = ClassDB::class_get_default_property_value(E2->get(), E->get().name);
+						prop.default_value = default_value.get_construct_string();
+						break;
+					}
+				}
+			}
+
 			bool found_type = false;
 			if (getter != StringName()) {
 				MethodBind *mb = ClassDB::get_method(name, getter);
@@ -412,6 +427,7 @@ void DocData::generate(bool p_basic_types) {
 				PropertyDoc pd;
 				pd.name = E->get();
 				pd.type = "int";
+				pd.default_value = itos(Theme::get_default()->get_constant(E->get(), cname));
 				c.theme_properties.push_back(pd);
 			}
 
@@ -422,6 +438,7 @@ void DocData::generate(bool p_basic_types) {
 				PropertyDoc pd;
 				pd.name = E->get();
 				pd.type = "Color";
+				pd.default_value = Variant(Theme::get_default()->get_color(E->get(), cname)).get_construct_string();
 				c.theme_properties.push_back(pd);
 			}
 
@@ -530,6 +547,7 @@ void DocData::generate(bool p_basic_types) {
 			PropertyDoc property;
 			property.name = pi.name;
 			property.type = Variant::get_type_name(pi.type);
+			property.default_value = v.get(pi.name).get_construct_string();
 
 			c.properties.push_back(property);
 		}
@@ -1063,12 +1081,15 @@ Error DocData::save_classes(const String &p_default_path, const Map<String, Stri
 
 			for (int i = 0; i < c.properties.size(); i++) {
 
-				String enum_text;
+				String additional_attributes;
 				if (c.properties[i].enumeration != String()) {
-					enum_text = " enum=\"" + c.properties[i].enumeration + "\"";
+					additional_attributes += " enum=\"" + c.properties[i].enumeration + "\"";
+				}
+				if (c.properties[i].default_value != String()) {
+					additional_attributes += " default=\"" + c.properties[i].default_value.xml_escape(true) + "\"";
 				}
 				const PropertyDoc &p = c.properties[i];
-				_write_string(f, 2, "<member name=\"" + p.name + "\" type=\"" + p.type + "\" setter=\"" + p.setter + "\" getter=\"" + p.getter + "\"" + enum_text + ">");
+				_write_string(f, 2, "<member name=\"" + p.name + "\" type=\"" + p.type + "\" setter=\"" + p.setter + "\" getter=\"" + p.getter + "\"" + additional_attributes + ">");
 				_write_string(f, 3, p.description.strip_edges().xml_escape());
 				_write_string(f, 2, "</member>");
 			}
@@ -1125,8 +1146,14 @@ Error DocData::save_classes(const String &p_default_path, const Map<String, Stri
 			for (int i = 0; i < c.theme_properties.size(); i++) {
 
 				const PropertyDoc &p = c.theme_properties[i];
-				_write_string(f, 2, "<theme_item name=\"" + p.name + "\" type=\"" + p.type + "\">");
+
+				if (p.default_value != "")
+					_write_string(f, 2, "<theme_item name=\"" + p.name + "\" type=\"" + p.type + "\" default=\"" + p.default_value.xml_escape(true) + "\">");
+				else
+					_write_string(f, 2, "<theme_item name=\"" + p.name + "\" type=\"" + p.type + "\">");
+
 				_write_string(f, 3, p.description.strip_edges().xml_escape());
+
 				_write_string(f, 2, "</theme_item>");
 			}
 			_write_string(f, 1, "</theme_items>");
diff --git a/editor/doc/doc_data.h b/editor/doc/doc_data.h
index d3844adb7e..3d5867dcca 100644
--- a/editor/doc/doc_data.h
+++ b/editor/doc/doc_data.h
@@ -73,6 +73,7 @@ public:
 		String enumeration;
 		String description;
 		String setter, getter;
+		String default_value;
 		bool operator<(const PropertyDoc &p_prop) const {
 			return name < p_prop.name;
 		}
diff --git a/editor/editor_help.cpp b/editor/editor_help.cpp
index 9918b655fb..ff50940842 100644
--- a/editor/editor_help.cpp
+++ b/editor/editor_help.cpp
@@ -48,9 +48,9 @@ void EditorHelp::_init_colors() {
 	text_color = get_color("default_color", "RichTextLabel");
 	headline_color = get_color("headline_color", "EditorHelp");
 	base_type_color = title_color.linear_interpolate(text_color, 0.5);
-	comment_color = text_color * Color(1, 1, 1, 0.6);
+	comment_color = text_color * Color(1, 1, 1, 0.4);
 	symbol_color = comment_color;
-	value_color = text_color * Color(1, 1, 1, 0.4);
+	value_color = text_color * Color(1, 1, 1, 0.6);
 	qualifier_color = text_color * Color(1, 1, 1, 0.8);
 	type_color = get_color("accent_color", "Editor").linear_interpolate(text_color, 0.5);
 	class_desc->add_color_override("selection_color", get_color("accent_color", "Editor") * Color(1, 1, 1, 0.4));
@@ -258,9 +258,11 @@ void EditorHelp::_add_method(const DocData::MethodDoc &p_method, bool p_overview
 		if (p_method.arguments[j].default_value != "") {
 
 			class_desc->push_color(symbol_color);
-			class_desc->add_text("=");
+			class_desc->add_text(" = ");
 			class_desc->pop();
+			class_desc->push_color(value_color);
 			_add_text(_fix_constant(p_method.arguments[j].default_value));
+			class_desc->pop();
 		}
 
 		class_desc->pop();
@@ -471,23 +473,37 @@ void EditorHelp::_update_doc() {
 			if (cd.properties[i].description != "") {
 				describe = true;
 			}
+
 			class_desc->push_cell();
+			class_desc->push_font(doc_code_font);
+			class_desc->push_color(headline_color);
+
 			if (describe) {
 				class_desc->push_meta("@member " + cd.properties[i].name);
 			}
 
-			class_desc->push_font(doc_code_font);
-			class_desc->push_color(headline_color);
 			_add_text(cd.properties[i].name);
 
-			class_desc->pop();
-			class_desc->pop();
-
 			if (describe) {
 				class_desc->pop();
 				property_descr = true;
 			}
 
+			if (cd.properties[i].default_value != "") {
+				class_desc->push_color(symbol_color);
+				class_desc->add_text(" [default: ");
+				class_desc->pop();
+				class_desc->push_color(value_color);
+				_add_text(_fix_constant(cd.properties[i].default_value));
+				class_desc->pop();
+				class_desc->push_color(symbol_color);
+				class_desc->add_text("]");
+				class_desc->pop();
+			}
+
+			class_desc->pop();
+			class_desc->pop();
+
 			class_desc->pop();
 		}
 
@@ -613,6 +629,19 @@ void EditorHelp::_update_doc() {
 			class_desc->push_color(headline_color);
 			_add_text(cd.theme_properties[i].name);
 			class_desc->pop();
+
+			if (cd.theme_properties[i].default_value != "") {
+				class_desc->push_color(symbol_color);
+				class_desc->add_text(" [default: ");
+				class_desc->pop();
+				class_desc->push_color(value_color);
+				_add_text(_fix_constant(cd.theme_properties[i].default_value));
+				class_desc->pop();
+				class_desc->push_color(symbol_color);
+				class_desc->add_text("]");
+				class_desc->pop();
+			}
+
 			class_desc->pop();
 
 			if (cd.theme_properties[i].description != "") {
@@ -671,7 +700,7 @@ void EditorHelp::_update_doc() {
 				if (cd.signals[i].arguments[j].default_value != "") {
 
 					class_desc->push_color(symbol_color);
-					class_desc->add_text("=");
+					class_desc->add_text(" = ");
 					class_desc->pop();
 					_add_text(cd.signals[i].arguments[j].default_value);
 				}
@@ -777,7 +806,7 @@ void EditorHelp::_update_doc() {
 					class_desc->add_text(" = ");
 					class_desc->pop();
 					class_desc->push_color(value_color);
-					_add_text(enum_list[i].value);
+					_add_text(_fix_constant(enum_list[i].value));
 					class_desc->pop();
 					class_desc->pop();
 					if (enum_list[i].description != "") {
@@ -843,7 +872,7 @@ void EditorHelp::_update_doc() {
 				class_desc->add_text(" = ");
 				class_desc->pop();
 				class_desc->push_color(value_color);
-				_add_text(constants[i].value);
+				_add_text(_fix_constant(constants[i].value));
 				class_desc->pop();
 
 				class_desc->pop();
@@ -963,6 +992,21 @@ void EditorHelp::_update_doc() {
 			class_desc->push_color(headline_color);
 			_add_text(cd.properties[i].name);
 			class_desc->pop(); // color
+
+			if (cd.properties[i].default_value != "") {
+				class_desc->push_color(symbol_color);
+				class_desc->add_text(" [default: ");
+				class_desc->pop(); // color
+
+				class_desc->push_color(value_color);
+				_add_text(_fix_constant(cd.properties[i].default_value));
+				class_desc->pop(); // color
+
+				class_desc->push_color(symbol_color);
+				class_desc->add_text("]");
+				class_desc->pop(); // color
+			}
+
 			class_desc->pop(); // font
 			class_desc->pop(); // cell
 
diff --git a/editor/editor_settings.cpp b/editor/editor_settings.cpp
index 8521c0c723..a36163f661 100644
--- a/editor/editor_settings.cpp
+++ b/editor/editor_settings.cpp
@@ -1473,6 +1473,10 @@ void EditorSettings::get_shortcut_list(List<String> *r_shortcuts) {
 
 Ref<ShortCut> ED_GET_SHORTCUT(const String &p_path) {
 
+	if (!EditorSettings::get_singleton()) {
+		return NULL;
+	}
+
 	Ref<ShortCut> sc = EditorSettings::get_singleton()->get_shortcut(p_path);
 	if (!sc.is_valid()) {
 		ERR_EXPLAIN("Used ED_GET_SHORTCUT with invalid shortcut: " + p_path);
@@ -1508,6 +1512,15 @@ Ref<ShortCut> ED_SHORTCUT(const String &p_path, const String &p_name, uint32_t p
 		ie->set_metakey(bool(p_keycode & KEY_MASK_META));
 	}
 
+	if (!EditorSettings::get_singleton()) {
+		Ref<ShortCut> sc;
+		sc.instance();
+		sc->set_name(p_name);
+		sc->set_shortcut(ie);
+		sc->set_meta("original", ie);
+		return sc;
+	}
+
 	Ref<ShortCut> sc = EditorSettings::get_singleton()->get_shortcut(p_path);
 	if (sc.is_valid()) {
 
diff --git a/main/main.cpp b/main/main.cpp
index 9183dab58c..77c4e5a385 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -1375,6 +1375,8 @@ bool Main::start() {
 #ifdef TOOLS_ENABLED
 	if (doc_tool != "") {
 
+		Engine::get_singleton()->set_editor_hint(true); // Needed to instance editor-only classes for their default values
+
 		{
 			DirAccessRef da = DirAccess::open(doc_tool);
 			if (!da) {
diff --git a/modules/enet/networked_multiplayer_enet.cpp b/modules/enet/networked_multiplayer_enet.cpp
index dcb4b7fd75..a5a356ced2 100644
--- a/modules/enet/networked_multiplayer_enet.cpp
+++ b/modules/enet/networked_multiplayer_enet.cpp
@@ -882,7 +882,9 @@ NetworkedMultiplayerENet::NetworkedMultiplayerENet() {
 
 NetworkedMultiplayerENet::~NetworkedMultiplayerENet() {
 
-	close_connection();
+	if (active) {
+		close_connection();
+	}
 }
 
 // Sets IP for ENet to bind when using create_server or create_client
diff --git a/modules/gdnative/arvr/arvr_interface_gdnative.cpp b/modules/gdnative/arvr/arvr_interface_gdnative.cpp
index da01f573ce..64e2c362b2 100644
--- a/modules/gdnative/arvr/arvr_interface_gdnative.cpp
+++ b/modules/gdnative/arvr/arvr_interface_gdnative.cpp
@@ -33,9 +33,13 @@
 #include "servers/arvr/arvr_positional_tracker.h"
 #include "servers/visual/visual_server_globals.h"
 
+void ARVRInterfaceGDNative::_bind_methods() {
+	ADD_PROPERTY_DEFAULT("interface_is_initialized", false);
+	ADD_PROPERTY_DEFAULT("ar_is_anchor_detection_enabled", false);
+}
+
 ARVRInterfaceGDNative::ARVRInterfaceGDNative() {
-	// testing
-	printf("Construct gdnative interface\n");
+	print_verbose("Construct gdnative interface\n");
 
 	// we won't have our data pointer until our library gets set
 	data = NULL;
@@ -44,9 +48,9 @@ ARVRInterfaceGDNative::ARVRInterfaceGDNative() {
 }
 
 ARVRInterfaceGDNative::~ARVRInterfaceGDNative() {
-	printf("Destruct gdnative interface\n");
+	print_verbose("Destruct gdnative interface\n");
 
-	if (is_initialized()) {
+	if (interface != NULL && is_initialized()) {
 		uninitialize();
 	};
 
@@ -99,13 +103,10 @@ int ARVRInterfaceGDNative::get_capabilities() const {
 }
 
 bool ARVRInterfaceGDNative::get_anchor_detection_is_enabled() const {
-	bool enabled;
 
 	ERR_FAIL_COND_V(interface == NULL, false);
 
-	enabled = interface->get_anchor_detection_is_enabled(data);
-
-	return enabled;
+	return interface->get_anchor_detection_is_enabled(data);
 }
 
 void ARVRInterfaceGDNative::set_anchor_detection_is_enabled(bool p_enable) {
@@ -137,21 +138,16 @@ bool ARVRInterfaceGDNative::is_stereo() {
 }
 
 bool ARVRInterfaceGDNative::is_initialized() const {
-	bool initialized;
 
 	ERR_FAIL_COND_V(interface == NULL, false);
 
-	initialized = interface->is_initialized(data);
-
-	return initialized;
+	return interface->is_initialized(data);
 }
 
 bool ARVRInterfaceGDNative::initialize() {
-	bool initialized;
-
 	ERR_FAIL_COND_V(interface == NULL, false);
 
-	initialized = interface->initialize(data);
+	bool initialized = interface->initialize(data);
 
 	if (initialized) {
 		// if we successfully initialize our interface and we don't have a primary interface yet, this becomes our primary interface
diff --git a/modules/gdnative/arvr/arvr_interface_gdnative.h b/modules/gdnative/arvr/arvr_interface_gdnative.h
index 651e5c8715..ab7090876a 100644
--- a/modules/gdnative/arvr/arvr_interface_gdnative.h
+++ b/modules/gdnative/arvr/arvr_interface_gdnative.h
@@ -49,6 +49,8 @@ protected:
 	const godot_arvr_interface_gdnative *interface;
 	void *data;
 
+	static void _bind_methods();
+
 public:
 	/** general interface information **/
 	ARVRInterfaceGDNative();
diff --git a/modules/gdnative/net/multiplayer_peer_gdnative.cpp b/modules/gdnative/net/multiplayer_peer_gdnative.cpp
index bdeba149d2..d2c95efa77 100644
--- a/modules/gdnative/net/multiplayer_peer_gdnative.cpp
+++ b/modules/gdnative/net/multiplayer_peer_gdnative.cpp
@@ -113,6 +113,8 @@ NetworkedMultiplayerPeer::ConnectionStatus MultiplayerPeerGDNative::get_connecti
 }
 
 void MultiplayerPeerGDNative::_bind_methods() {
+	ADD_PROPERTY_DEFAULT("transfer_mode", TRANSFER_MODE_UNRELIABLE);
+	ADD_PROPERTY_DEFAULT("refuse_new_connections", true);
 }
 
 extern "C" {
diff --git a/modules/webrtc/webrtc_data_channel_gdnative.cpp b/modules/webrtc/webrtc_data_channel_gdnative.cpp
index 4f33491af2..6362634626 100644
--- a/modules/webrtc/webrtc_data_channel_gdnative.cpp
+++ b/modules/webrtc/webrtc_data_channel_gdnative.cpp
@@ -35,6 +35,7 @@
 #include "modules/gdnative/nativescript/nativescript.h"
 
 void WebRTCDataChannelGDNative::_bind_methods() {
+	ADD_PROPERTY_DEFAULT("write_mode", WRITE_MODE_BINARY);
 }
 
 WebRTCDataChannelGDNative::WebRTCDataChannelGDNative() {
diff --git a/scene/2d/physics_body_2d.cpp b/scene/2d/physics_body_2d.cpp
index 2bd9e5e2a2..95acf13fad 100644
--- a/scene/2d/physics_body_2d.cpp
+++ b/scene/2d/physics_body_2d.cpp
@@ -1541,7 +1541,7 @@ Vector2 KinematicCollision2D::get_remainder() const {
 	return collision.remainder;
 }
 Object *KinematicCollision2D::get_local_shape() const {
-	ERR_FAIL_COND_V(!owner, NULL);
+	if (!owner) return NULL;
 	uint32_t ownerid = owner->shape_find_owner(collision.local_shape);
 	return owner->shape_owner_get_owner(ownerid);
 }
diff --git a/scene/3d/arvr_nodes.cpp b/scene/3d/arvr_nodes.cpp
index 95eec41fb2..dfa8fce9be 100644
--- a/scene/3d/arvr_nodes.cpp
+++ b/scene/3d/arvr_nodes.cpp
@@ -264,6 +264,7 @@ void ARVRController::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_rumble"), &ARVRController::get_rumble);
 	ClassDB::bind_method(D_METHOD("set_rumble", "rumble"), &ARVRController::set_rumble);
 	ADD_PROPERTY(PropertyInfo(Variant::REAL, "rumble", PROPERTY_HINT_RANGE, "0.0,1.0,0.01"), "set_rumble", "get_rumble");
+	ADD_PROPERTY_DEFAULT("rumble", 0.0);
 
 	ClassDB::bind_method(D_METHOD("get_mesh"), &ARVRController::get_mesh);
 
diff --git a/scene/3d/physics_body.cpp b/scene/3d/physics_body.cpp
index 3624e04434..d3aad7000d 100644
--- a/scene/3d/physics_body.cpp
+++ b/scene/3d/physics_body.cpp
@@ -1470,7 +1470,7 @@ Vector3 KinematicCollision::get_remainder() const {
 	return collision.remainder;
 }
 Object *KinematicCollision::get_local_shape() const {
-	ERR_FAIL_COND_V(!owner, NULL);
+	if (!owner) return NULL;
 	uint32_t ownerid = owner->shape_find_owner(collision.local_shape);
 	return owner->shape_owner_get_owner(ownerid);
 }
diff --git a/scene/main/scene_tree.cpp b/scene/main/scene_tree.cpp
index 7f0cebd492..0e7cec57a4 100644
--- a/scene/main/scene_tree.cpp
+++ b/scene/main/scene_tree.cpp
@@ -614,6 +614,7 @@ void SceneTree::finish() {
 		root->_set_tree(NULL);
 		root->_propagate_after_exit_tree();
 		memdelete(root); //delete root
+		root = NULL;
 	}
 }
 
@@ -1889,6 +1890,7 @@ void SceneTree::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "debug_navigation_hint"), "set_debug_navigation_hint", "is_debugging_navigation_hint");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "paused"), "set_pause", "is_paused");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "refuse_new_network_connections"), "set_refuse_new_network_connections", "is_refusing_new_network_connections");
+	ADD_PROPERTY_DEFAULT("refuse_new_network_connections", false);
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "use_font_oversampling"), "set_use_font_oversampling", "is_using_font_oversampling");
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "edited_scene_root", PROPERTY_HINT_RESOURCE_TYPE, "Node", 0), "set_edited_scene_root", "get_edited_scene_root");
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "current_scene", PROPERTY_HINT_RESOURCE_TYPE, "Node", 0), "set_current_scene", "get_current_scene");
@@ -1962,7 +1964,7 @@ bool SceneTree::is_using_font_oversampling() const {
 
 SceneTree::SceneTree() {
 
-	singleton = this;
+	if (singleton == NULL) singleton = this;
 	_quit = false;
 	accept_quit = true;
 	quit_on_go_back = true;
@@ -2107,4 +2109,11 @@ SceneTree::SceneTree() {
 }
 
 SceneTree::~SceneTree() {
+	if (root) {
+		root->_set_tree(NULL);
+		root->_propagate_after_exit_tree();
+		memdelete(root);
+	}
+
+	if (singleton == this) singleton = NULL;
 }
diff --git a/scene/resources/concave_polygon_shape_2d.cpp b/scene/resources/concave_polygon_shape_2d.cpp
index 51dd91fff5..de853f0c30 100644
--- a/scene/resources/concave_polygon_shape_2d.cpp
+++ b/scene/resources/concave_polygon_shape_2d.cpp
@@ -104,4 +104,6 @@ void ConcavePolygonShape2D::_bind_methods() {
 
 ConcavePolygonShape2D::ConcavePolygonShape2D() :
 		Shape2D(Physics2DServer::get_singleton()->concave_polygon_shape_create()) {
+	PoolVector<Vector2> empty;
+	set_segments(empty);
 }