Allow some non-integer built-in constants in gdscript

8 files changed, 104 insertions, 18 deletions

diff --git a/core/variant.h b/core/variant.h
index 4b245d25e6..b48a0b3e73 100644
--- a/core/variant.h
+++ b/core/variant.h
@@ -398,9 +398,9 @@ public:
 
 	void static_assign(const Variant &p_variant);
 	static void get_constructor_list(Variant::Type p_type, List<MethodInfo> *p_list);
-	static void get_numeric_constants_for_type(Variant::Type p_type, List<StringName> *p_constants);
-	static bool has_numeric_constant(Variant::Type p_type, const StringName &p_value);
-	static int get_numeric_constant_value(Variant::Type p_type, const StringName &p_value, bool *r_valid = NULL);
+	static void get_constants_for_type(Variant::Type p_type, List<StringName> *p_constants);
+	static bool has_constant(Variant::Type p_type, const StringName &p_value);
+	static Variant get_constant_value(Variant::Type p_type, const StringName &p_value, bool *r_valid = NULL);
 
 	typedef String (*ObjectDeConstruct)(const Variant &p_object, void *ud);
 	typedef void (*ObjectConstruct)(const String &p_text, void *ud, Variant &r_value);
diff --git a/core/variant_call.cpp b/core/variant_call.cpp
index 20a2929dc0..19308ff683 100644
--- a/core/variant_call.cpp
+++ b/core/variant_call.cpp
@@ -30,6 +30,7 @@
 
 #include "variant.h"
 
+#include "core/color_names.inc"
 #include "core_string_names.h"
 #include "io/compression.h"
 #include "object.h"
@@ -991,6 +992,7 @@ struct _VariantCall {
 #ifdef DEBUG_ENABLED
 		List<StringName> value_ordered;
 #endif
+		Map<StringName, Variant> variant_value;
 	};
 
 	static ConstantData *constant_data;
@@ -1002,6 +1004,11 @@ struct _VariantCall {
 		constant_data[p_type].value_ordered.push_back(p_constant_name);
 #endif
 	}
+
+	static void add_variant_constant(int p_type, StringName p_constant_name, const Variant &p_constant_value) {
+
+		constant_data[p_type].variant_value[p_constant_name] = p_constant_value;
+	}
 };
 
 _VariantCall::TypeFunc *_VariantCall::type_funcs = NULL;
@@ -1354,7 +1361,7 @@ void Variant::get_constructor_list(Variant::Type p_type, List<MethodInfo> *p_lis
 	}
 }
 
-void Variant::get_numeric_constants_for_type(Variant::Type p_type, List<StringName> *p_constants) {
+void Variant::get_constants_for_type(Variant::Type p_type, List<StringName> *p_constants) {
 
 	ERR_FAIL_INDEX(p_type, Variant::VARIANT_MAX);
 
@@ -1370,16 +1377,21 @@ void Variant::get_numeric_constants_for_type(Variant::Type p_type, List<StringNa
 		p_constants->push_back(E->key());
 #endif
 	}
+
+	for (Map<StringName, Variant>::Element *E = cd.variant_value.front(); E; E = E->next()) {
+
+		p_constants->push_back(E->key());
+	}
 }
 
-bool Variant::has_numeric_constant(Variant::Type p_type, const StringName &p_value) {
+bool Variant::has_constant(Variant::Type p_type, const StringName &p_value) {
 
 	ERR_FAIL_INDEX_V(p_type, Variant::VARIANT_MAX, false);
 	_VariantCall::ConstantData &cd = _VariantCall::constant_data[p_type];
-	return cd.value.has(p_value);
+	return cd.value.has(p_value) || cd.variant_value.has(p_value);
 }
 
-int Variant::get_numeric_constant_value(Variant::Type p_type, const StringName &p_value, bool *r_valid) {
+Variant Variant::get_constant_value(Variant::Type p_type, const StringName &p_value, bool *r_valid) {
 
 	if (r_valid)
 		*r_valid = false;
@@ -1389,7 +1401,14 @@ int Variant::get_numeric_constant_value(Variant::Type p_type, const StringName &
 
 	Map<StringName, int>::Element *E = cd.value.find(p_value);
 	if (!E) {
-		return -1;
+		Map<StringName, Variant>::Element *E = cd.variant_value.find(p_value);
+		if (E) {
+			if (r_valid)
+				*r_valid = true;
+			return E->get();
+		} else {
+			return -1;
+		}
 	}
 	if (r_valid)
 		*r_valid = true;
@@ -1858,9 +1877,62 @@ void register_variant_methods() {
 
 	/* REGISTER CONSTANTS */
 
+	_populate_named_colors();
+	for (Map<String, Color>::Element *color = _named_colors.front(); color; color = color->next()) {
+		_VariantCall::add_variant_constant(Variant::COLOR, color->key(), color->value());
+	}
+
 	_VariantCall::add_constant(Variant::VECTOR3, "AXIS_X", Vector3::AXIS_X);
 	_VariantCall::add_constant(Variant::VECTOR3, "AXIS_Y", Vector3::AXIS_Y);
 	_VariantCall::add_constant(Variant::VECTOR3, "AXIS_Z", Vector3::AXIS_Z);
+
+	_VariantCall::add_variant_constant(Variant::VECTOR3, "ZERO", Vector3(0, 0, 0));
+	_VariantCall::add_variant_constant(Variant::VECTOR3, "INF", Vector3(Math_INF, Math_INF, Math_INF));
+	_VariantCall::add_variant_constant(Variant::VECTOR3, "LEFT", Vector3(-1, 0, 0));
+	_VariantCall::add_variant_constant(Variant::VECTOR3, "RIGHT", Vector3(1, 0, 0));
+	_VariantCall::add_variant_constant(Variant::VECTOR3, "UP", Vector3(0, 1, 0));
+	_VariantCall::add_variant_constant(Variant::VECTOR3, "DOWN", Vector3(0, -1, 0));
+	_VariantCall::add_variant_constant(Variant::VECTOR3, "FORWARD", Vector3(0, 0, -1));
+	_VariantCall::add_variant_constant(Variant::VECTOR3, "BACK", Vector3(0, 0, 1));
+
+	_VariantCall::add_variant_constant(Variant::VECTOR2, "ZERO", Vector2(0, 0));
+	_VariantCall::add_variant_constant(Variant::VECTOR2, "INF", Vector2(Math_INF, Math_INF));
+	_VariantCall::add_variant_constant(Variant::VECTOR2, "LEFT", Vector2(-1, 0));
+	_VariantCall::add_variant_constant(Variant::VECTOR2, "RIGHT", Vector2(1, 0));
+	_VariantCall::add_variant_constant(Variant::VECTOR2, "UP", Vector2(0, -1));
+	_VariantCall::add_variant_constant(Variant::VECTOR2, "DOWN", Vector2(0, 1));
+
+	_VariantCall::add_variant_constant(Variant::TRANSFORM2D, "IDENTITY", Transform2D(1, 0, 0, 1, 0, 0));
+	_VariantCall::add_variant_constant(Variant::TRANSFORM2D, "FLIP_X", Transform2D(-1, 0, 0, 1, 0, 0));
+	_VariantCall::add_variant_constant(Variant::TRANSFORM2D, "FLIP_Y", Transform2D(1, 0, 0, -1, 0, 0));
+
+	Transform identity_transform, transform_x, transform_y, transform_z;
+	identity_transform.set(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0);
+	_VariantCall::add_variant_constant(Variant::TRANSFORM, "IDENTITY", identity_transform);
+	transform_x.set(-1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0);
+	_VariantCall::add_variant_constant(Variant::TRANSFORM, "FLIP_X", transform_x);
+	transform_x.set(1, 0, 0, 0, -1, 0, 0, 0, 1, 0, 0, 0);
+	_VariantCall::add_variant_constant(Variant::TRANSFORM, "FLIP_Y", transform_y);
+	transform_x.set(1, 0, 0, 0, 1, 0, 0, 0, -1, 0, 0, 0);
+	_VariantCall::add_variant_constant(Variant::TRANSFORM, "FLIP_Z", transform_z);
+
+	_VariantCall::add_variant_constant(Variant::PLANE, "X", Plane(Vector3(1, 0, 0), 0));
+	_VariantCall::add_variant_constant(Variant::PLANE, "Y", Plane(Vector3(0, 1, 0), 0));
+	_VariantCall::add_variant_constant(Variant::PLANE, "Z", Plane(Vector3(0, 0, 1), 0));
+
+	_VariantCall::add_variant_constant(Variant::QUAT, "IDENTITY", Quat(0, 0, 0, 1));
+
+	CharType black_circle[2] = { 0x25CF, 0 };
+	_VariantCall::add_variant_constant(Variant::STRING, "BLACK_CIRCLE", String(black_circle));
+	CharType white_circle[2] = { 0x25CB, 0 };
+	_VariantCall::add_variant_constant(Variant::STRING, "WHITE_CIRCLE", String(white_circle));
+	CharType black_diamond[2] = { 0x25C6, 0 };
+	_VariantCall::add_variant_constant(Variant::STRING, "BLACK_DIAMOND", String(black_diamond));
+	CharType white_diamond[2] = { 0x25C7, 0 };
+	_VariantCall::add_variant_constant(Variant::STRING, "WHITE_DIAMOND", String(white_diamond));
+
+	_VariantCall::add_variant_constant(Variant::NODE_PATH, "CURRENT", String("."));
+	_VariantCall::add_variant_constant(Variant::NODE_PATH, "PARENT", String(".."));
 }
 
 void unregister_variant_methods() {
diff --git a/doc/classes/Color.xml b/doc/classes/Color.xml
index 3d74bd7ab0..c675bbe994 100644
--- a/doc/classes/Color.xml
+++ b/doc/classes/Color.xml
@@ -5,7 +5,7 @@
 	</brief_description>
 	<description>
 		A color is represented as red, green and blue (r,g,b) components. Additionally, "a" represents the alpha component, often used for transparency. Values are in floating point and usually range from 0 to 1.  Some methods (such as set_modulate(color)) may accept values &gt; 1.
-		You can also create a color from standardised color names with [method @GDScript.ColorN].
+		You can also create a color from standardised color names with Color.ColorN (e.g. Color.green) or [method @GDScript.ColorN].
 	</description>
 	<tutorials>
 	</tutorials>
diff --git a/editor/doc/doc_data.cpp b/editor/doc/doc_data.cpp
index 2803762973..91a29f5717 100644
--- a/editor/doc/doc_data.cpp
+++ b/editor/doc/doc_data.cpp
@@ -535,13 +535,14 @@ void DocData::generate(bool p_basic_types) {
 		}
 
 		List<StringName> constants;
-		Variant::get_numeric_constants_for_type(Variant::Type(i), &constants);
+		Variant::get_constants_for_type(Variant::Type(i), &constants);
 
 		for (List<StringName>::Element *E = constants.front(); E; E = E->next()) {
 
 			ConstantDoc constant;
 			constant.name = E->get();
-			constant.value = itos(Variant::get_numeric_constant_value(Variant::Type(i), E->get()));
+			Variant value = Variant::get_constant_value(Variant::Type(i), E->get());
+			constant.value = value.get_type() == Variant::INT ? itos(value) : value.get_construct_string();
 			c.constants.push_back(constant);
 		}
 	}
diff --git a/editor/editor_help.cpp b/editor/editor_help.cpp
index 727383b960..b7a5f67870 100644
--- a/editor/editor_help.cpp
+++ b/editor/editor_help.cpp
@@ -1214,6 +1214,18 @@ Error EditorHelp::_goto_desc(const String &p_class, int p_vscr) {
 
 				constant_line[constants[i].name] = class_desc->get_line_count() - 2;
 				class_desc->push_font(doc_code_font);
+
+				if (constants[i].value.begins_with("Color(") && constants[i].value.ends_with(")")) {
+					String stripped = constants[i].value.replace(" ", "").replace("Color(", "").replace(")", "");
+					Vector<float> color = stripped.split_floats(",");
+					if (color.size() >= 3) {
+						class_desc->push_color(Color(color[0], color[1], color[2]));
+						static const CharType prefix[3] = { 0x25CF /* filled circle */, ' ', 0 };
+						class_desc->add_text(String(prefix));
+						class_desc->pop();
+					}
+				}
+
 				class_desc->push_color(headline_color);
 				_add_text(constants[i].name);
 				class_desc->pop();
@@ -1223,6 +1235,7 @@ Error EditorHelp::_goto_desc(const String &p_class, int p_vscr) {
 				class_desc->push_color(value_color);
 				_add_text(constants[i].value);
 				class_desc->pop();
+
 				class_desc->pop();
 				if (constants[i].description != "") {
 					class_desc->push_font(doc_font);
diff --git a/modules/gdscript/gdscript_editor.cpp b/modules/gdscript/gdscript_editor.cpp
index 2a42524ba7..eadaf3feda 100644
--- a/modules/gdscript/gdscript_editor.cpp
+++ b/modules/gdscript/gdscript_editor.cpp
@@ -2442,7 +2442,7 @@ Error GDScriptLanguage::complete_code(const String &p_code, const String &p_base
 		} break;
 		case GDScriptParser::COMPLETION_BUILT_IN_TYPE_CONSTANT: {
 			List<StringName> constants;
-			Variant::get_numeric_constants_for_type(parser.get_completion_built_in_constant(), &constants);
+			Variant::get_constants_for_type(parser.get_completion_built_in_constant(), &constants);
 			for (List<StringName>::Element *E = constants.front(); E; E = E->next()) {
 				options.insert(E->get().operator String());
 			}
@@ -3065,7 +3065,7 @@ static Error _lookup_symbol_from_base(const GDScriptParser::DataType &p_base, co
 			case GDScriptParser::DataType::BUILTIN: {
 				base_type.has_type = false;
 
-				if (Variant::has_numeric_constant(base_type.builtin_type, p_symbol)) {
+				if (Variant::has_constant(base_type.builtin_type, p_symbol)) {
 					r_result.type = ScriptLanguage::LookupResult::RESULT_CLASS_CONSTANT;
 					r_result.class_name = Variant::get_type_name(base_type.builtin_type);
 					r_result.class_member = p_symbol;
diff --git a/modules/gdscript/gdscript_parser.cpp b/modules/gdscript/gdscript_parser.cpp
index 852d465206..15ee4f4219 100644
--- a/modules/gdscript/gdscript_parser.cpp
+++ b/modules/gdscript/gdscript_parser.cpp
@@ -607,7 +607,7 @@ GDScriptParser::Node *GDScriptParser::_parse_expression(Node *p_parent, bool p_s
 				_set_error("Built-in type constant or static function expected after '.'");
 				return NULL;
 			}
-			if (!Variant::has_numeric_constant(bi_type, identifier)) {
+			if (!Variant::has_constant(bi_type, identifier)) {
 
 				if (tokenizer->get_token() == GDScriptTokenizer::TK_PARENTHESIS_OPEN &&
 						Variant::is_method_const(bi_type, identifier) &&
@@ -642,7 +642,7 @@ GDScriptParser::Node *GDScriptParser::_parse_expression(Node *p_parent, bool p_s
 			} else {
 
 				ConstantNode *cn = alloc_node<ConstantNode>();
-				cn->value = Variant::get_numeric_constant_value(bi_type, identifier);
+				cn->value = Variant::get_constant_value(bi_type, identifier);
 				cn->datatype = _type_from_variant(cn->value);
 				expr = cn;
 			}
diff --git a/modules/visual_script/visual_script_nodes.cpp b/modules/visual_script/visual_script_nodes.cpp
index a6ec36d364..d499512d93 100644
--- a/modules/visual_script/visual_script_nodes.cpp
+++ b/modules/visual_script/visual_script_nodes.cpp
@@ -1663,7 +1663,7 @@ Variant::Type VisualScriptBasicTypeConstant::get_basic_type() const {
 
 class VisualScriptNodeInstanceBasicTypeConstant : public VisualScriptNodeInstance {
 public:
-	int value;
+	Variant value;
 	bool valid;
 	//virtual int get_working_memory_size() const { return 0; }
 
@@ -1682,7 +1682,7 @@ public:
 VisualScriptNodeInstance *VisualScriptBasicTypeConstant::instance(VisualScriptInstance *p_instance) {
 
 	VisualScriptNodeInstanceBasicTypeConstant *instance = memnew(VisualScriptNodeInstanceBasicTypeConstant);
-	instance->value = Variant::get_numeric_constant_value(type, name, &instance->valid);
+	instance->value = Variant::get_constant_value(type, name, &instance->valid);
 	return instance;
 }
 
@@ -1691,7 +1691,7 @@ void VisualScriptBasicTypeConstant::_validate_property(PropertyInfo &property) c
 	if (property.name == "constant") {
 
 		List<StringName> constants;
-		Variant::get_numeric_constants_for_type(type, &constants);
+		Variant::get_constants_for_type(type, &constants);
 
 		if (constants.size() == 0) {
 			property.usage = 0;