From 8a8dbd76b165db2b94c1625873da9e13bf24c2b9 Mon Sep 17 00:00:00 2001 From: George Marques Date: Tue, 12 Jan 2021 14:12:40 -0300 Subject: Add GDNative JSON generator for the builtin API Which can be used by language bindings to generate code statically. This is generated as a different file from the class API because it has different requirements (the builtin types have constructors and don't have signals), so bindings can better make use of each JSON file without extra parsing. This also cleans up a bit the old API generator, mainly initializing structs and renaming "instanciable" to the more correct "instantiable". The argument description in help text was updated to better reflect how it should be used. The argument is mandatory. --- modules/gdnative/nativescript/api_generator.cpp | 412 ++++++++++++++++++++++-- 1 file changed, 394 insertions(+), 18 deletions(-) (limited to 'modules/gdnative/nativescript/api_generator.cpp') diff --git a/modules/gdnative/nativescript/api_generator.cpp b/modules/gdnative/nativescript/api_generator.cpp index 6b46c9418a..2b824938f2 100644 --- a/modules/gdnative/nativescript/api_generator.cpp +++ b/modules/gdnative/nativescript/api_generator.cpp @@ -36,6 +36,7 @@ #include "core/core_constants.h" #include "core/object/class_db.h" #include "core/os/file_access.h" +#include "core/string/string_builder.h" #include "core/templates/pair.h" // helper stuff @@ -65,14 +66,14 @@ struct MethodAPI { Map default_arguments; - int argument_count; - bool has_varargs; - bool is_editor; - bool is_noscript; - bool is_const; - bool is_reverse; - bool is_virtual; - bool is_from_script; + int argument_count = 0; + bool has_varargs = false; + bool is_editor = false; + bool is_noscript = false; + bool is_const = false; + bool is_reverse = false; + bool is_virtual = false; + bool is_from_script = false; }; struct PropertyAPI { @@ -80,12 +81,14 @@ struct PropertyAPI { String getter; String setter; String type; - int index; + int index = 0; }; struct ConstantAPI { String constant_name; - int constant_value; + int constant_value = 0; + Variant builtin_constant_value; // For builtin types; + String builtin_constant_type; // For builtin types; }; struct SignalAPI { @@ -100,23 +103,34 @@ struct EnumAPI { List> values; }; +struct OperatorAPI { // For builtin types; + String name; + int oper = Variant::OP_MAX; + String other_type; + String return_type; +}; + struct ClassAPI { String class_name; String super_class_name; - ClassDB::APIType api_type; + ClassDB::APIType api_type = ClassDB::API_NONE; - bool is_singleton; + bool is_singleton = false; String singleton_name; - bool is_instanciable; + bool is_instantiable = false; // @Unclear - bool is_reference; + bool is_reference = false; + bool has_indexing = false; // For builtin types. + bool is_keyed = false; // For builtin types. List methods; + List constructors; // For builtin types. List properties; List constants; List signals_; List enums; + List operators; // For builtin types. }; static String get_type_name(const PropertyInfo &info) { @@ -180,7 +194,7 @@ List generate_c_api_classes() { global_constants_api.api_type = ClassDB::API_CORE; global_constants_api.is_singleton = true; global_constants_api.singleton_name = "CoreConstants"; - global_constants_api.is_instanciable = false; + global_constants_api.is_instantiable = false; const int constants_count = CoreConstants::get_global_constant_count(); for (int i = 0; i < constants_count; ++i) { ConstantAPI constant_api; @@ -195,6 +209,10 @@ List generate_c_api_classes() { for (List::Element *e = classes.front(); e != nullptr; e = e->next()) { StringName class_name = e->get(); + if (!ClassDB::is_class_exposed(class_name)) { + continue; + } + ClassAPI class_api; class_api.api_type = ClassDB::get_api_type(e->get()); class_api.class_name = class_name; @@ -209,7 +227,7 @@ List generate_c_api_classes() { class_api.singleton_name = name; } } - class_api.is_instanciable = !class_api.is_singleton && ClassDB::can_instance(class_name); + class_api.is_instantiable = !class_api.is_singleton && ClassDB::can_instance(class_name); { List inheriters; @@ -401,6 +419,191 @@ List generate_c_api_classes() { return api; } +/* + * Reads the builtin Variant API to a list + */ +List generate_c_builtin_api_types() { + List api; + + // Special class for the utility methods. + { + ClassAPI utility_api; + utility_api.class_name = "Utilities"; + utility_api.is_instantiable = false; + + List utility_functions; + Variant::get_utility_function_list(&utility_functions); + for (const List::Element *E = utility_functions.front(); E; E = E->next()) { + const StringName &function_name = E->get(); + + MethodAPI function_api; + function_api.method_name = function_name; + function_api.has_varargs = Variant::is_utility_function_vararg(function_name); + function_api.argument_count = function_api.has_varargs ? 0 : Variant::get_utility_function_argument_count(function_name); + function_api.is_const = Variant::get_utility_function_type(function_name) == Variant::UTILITY_FUNC_TYPE_MATH; + + for (int i = 0; i < function_api.argument_count; i++) { + function_api.argument_names.push_back(Variant::get_utility_function_argument_name(function_name, i)); + Variant::Type arg_type = Variant::get_utility_function_argument_type(function_name, i); + function_api.argument_types.push_back(arg_type == Variant::NIL ? "Variant" : Variant::get_type_name(arg_type)); + } + + if (Variant::has_utility_function_return_value(function_name)) { + Variant::Type ret_type = Variant::get_utility_function_return_type(function_name); + function_api.return_type = ret_type == Variant::NIL ? "Variant" : Variant::get_type_name(ret_type); + } else { + function_api.return_type = "void"; + } + + utility_api.methods.push_back(function_api); + } + + api.push_back(utility_api); + } + + for (int t = 0; t < Variant::VARIANT_MAX; t++) { + Variant::Type type = (Variant::Type)t; + + ClassAPI class_api; + class_api.class_name = Variant::get_type_name(type); + class_api.is_instantiable = true; + class_api.has_indexing = Variant::has_indexing(type); + class_api.is_keyed = Variant::is_keyed(type); + // Types that are passed by reference. + switch (type) { + case Variant::OBJECT: + case Variant::DICTIONARY: + case Variant::ARRAY: + case Variant::PACKED_BYTE_ARRAY: + case Variant::PACKED_INT32_ARRAY: + case Variant::PACKED_INT64_ARRAY: + case Variant::PACKED_FLOAT32_ARRAY: + case Variant::PACKED_FLOAT64_ARRAY: + case Variant::PACKED_STRING_ARRAY: + case Variant::PACKED_VECTOR2_ARRAY: + case Variant::PACKED_VECTOR3_ARRAY: + case Variant::PACKED_COLOR_ARRAY: + class_api.is_reference = true; + break; + default: + class_api.is_reference = false; + break; + } + + // Methods. + + List methods; + Variant::get_builtin_method_list(type, &methods); + for (const List::Element *E = methods.front(); E; E = E->next()) { + const StringName &method_name = E->get(); + + MethodAPI method_api; + + method_api.method_name = method_name; + method_api.argument_count = Variant::get_builtin_method_argument_count(type, method_name); + method_api.has_varargs = Variant::is_builtin_method_vararg(type, method_name); + method_api.is_const = Variant::is_builtin_method_const(type, method_name); + + for (int i = 0; i < method_api.argument_count; i++) { + method_api.argument_names.push_back(Variant::get_builtin_method_argument_name(type, method_name, i)); + Variant::Type arg_type = Variant::get_builtin_method_argument_type(type, method_name, i); + method_api.argument_types.push_back(arg_type == Variant::NIL ? "Variant" : Variant::get_type_name(arg_type)); + } + + Vector default_arguments = Variant::get_builtin_method_default_arguments(type, method_name); + + int default_start = method_api.argument_names.size() - default_arguments.size(); + + for (int i = 0; i < default_arguments.size(); i++) { + method_api.default_arguments[default_start + i] = default_arguments[i]; + } + + if (Variant::has_builtin_method_return_value(type, method_name)) { + Variant::Type ret_type = Variant::get_builtin_method_return_type(type, method_name); + method_api.return_type = ret_type == Variant::NIL ? "Variant" : Variant::get_type_name(ret_type); + } else { + method_api.return_type = "void"; + } + + class_api.methods.push_back(method_api); + } + + // Constructors. + + for (int c = 0; c < Variant::get_constructor_count(type); c++) { + MethodAPI constructor_api; + + constructor_api.method_name = Variant::get_type_name(type); + constructor_api.argument_count = Variant::get_constructor_argument_count(type, c); + constructor_api.return_type = Variant::get_type_name(type); + + for (int i = 0; i < constructor_api.argument_count; i++) { + constructor_api.argument_names.push_back(Variant::get_constructor_argument_name(type, c, i)); + Variant::Type arg_type = Variant::get_constructor_argument_type(type, c, i); + constructor_api.argument_types.push_back(arg_type == Variant::NIL ? "Variant" : Variant::get_type_name(arg_type)); + } + + class_api.constructors.push_back(constructor_api); + } + + // Constants. + + List constants; + Variant::get_constants_for_type(type, &constants); + for (const List::Element *E = constants.front(); E; E = E->next()) { + const StringName &constant_name = E->get(); + ConstantAPI constant_api; + + constant_api.constant_name = constant_name; + constant_api.builtin_constant_value = Variant::get_constant_value(type, constant_name); + constant_api.builtin_constant_type = Variant::get_type_name(constant_api.builtin_constant_value.get_type()); + + class_api.constants.push_back(constant_api); + } + + // Members. + + List members; + Variant::get_member_list(type, &members); + for (const List::Element *E = members.front(); E; E = E->next()) { + const StringName &member_name = E->get(); + + PropertyAPI member_api; + member_api.name = member_name; + Variant::Type member_type = Variant::get_member_type(type, member_name); + member_api.type = member_type == Variant::NIL ? "Variant" : Variant::get_type_name(member_type); + + class_api.properties.push_back(member_api); + } + + // Operators. + + for (int op = 0; op < Variant::OP_MAX; op++) { + Variant::Operator oper = (Variant::Operator)op; + + for (int ot = 0; ot < Variant::VARIANT_MAX; ot++) { + Variant::Type other_type = (Variant::Type)ot; + + if (!Variant::get_validated_operator_evaluator(oper, type, other_type)) { + continue; + } + + OperatorAPI oper_api; + oper_api.name = Variant::get_operator_name(oper); + oper_api.oper = oper; + oper_api.other_type = Variant::get_type_name(other_type); + oper_api.return_type = Variant::get_type_name(Variant::get_operator_return_type(oper, type, other_type)); + + class_api.operators.push_back(oper_api); + } + } + + api.push_back(class_api); + } + + return api; +} + /* * Generates the JSON source from the API in p_api */ @@ -421,9 +624,8 @@ static List generate_c_api_json(const List &p_api) { source.push_back(String("\t\t\"api_type\": \"") + (api.api_type == ClassDB::API_CORE ? "core" : (api.api_type == ClassDB::API_EDITOR ? "tools" : "none")) + "\",\n"); source.push_back(String("\t\t\"singleton\": ") + (api.is_singleton ? "true" : "false") + ",\n"); source.push_back("\t\t\"singleton_name\": \"" + api.singleton_name + "\",\n"); - source.push_back(String("\t\t\"instanciable\": ") + (api.is_instanciable ? "true" : "false") + ",\n"); + source.push_back(String("\t\t\"instantiable\": ") + (api.is_instantiable ? "true" : "false") + ",\n"); source.push_back(String("\t\t\"is_reference\": ") + (api.is_reference ? "true" : "false") + ",\n"); - // @Unclear source.push_back("\t\t\"constants\": {\n"); for (List::Element *e = api.constants.front(); e; e = e->next()) { @@ -508,6 +710,164 @@ static List generate_c_api_json(const List &p_api) { return source; } +static int indent_level = 0; + +static void append_indented(StringBuilder &p_source, const String &p_text) { + for (int i = 0; i < indent_level; i++) { + p_source.append("\t"); + } + p_source.append(p_text); + p_source.append("\n"); +} + +static void append_indented(StringBuilder &p_source, const char *p_text) { + for (int i = 0; i < indent_level; i++) { + p_source.append("\t"); + } + p_source.append(p_text); + p_source.append("\n"); +} + +static void write_builtin_method(StringBuilder &p_source, const MethodAPI &p_method) { + append_indented(p_source, vformat(R"("name": "%s",)", p_method.method_name)); + append_indented(p_source, vformat(R"("return_type": "%s",)", p_method.return_type)); + append_indented(p_source, vformat(R"("is_const": %s,)", p_method.is_const ? "true" : "false")); + append_indented(p_source, vformat(R"("has_varargs": %s,)", p_method.has_varargs ? "true" : "false")); + + append_indented(p_source, R"("arguments": [)"); + indent_level++; + for (int i = 0; i < p_method.argument_count; i++) { + append_indented(p_source, "{"); + indent_level++; + + append_indented(p_source, vformat(R"("name": "%s",)", p_method.argument_names[i])); + append_indented(p_source, vformat(R"("type": "%s",)", p_method.argument_types[i])); + append_indented(p_source, vformat(R"("has_default_value": %s,)", p_method.default_arguments.has(i) ? "true" : "false")); + append_indented(p_source, vformat(R"("default_value": "%s")", p_method.default_arguments.has(i) ? p_method.default_arguments[i].operator String() : "")); + + indent_level--; + append_indented(p_source, i < p_method.argument_count - 1 ? "}," : "}"); + } + indent_level--; + append_indented(p_source, "]"); +} + +static List generate_c_builtin_api_json(const List &p_api) { + StringBuilder source; + + source.append("[\n"); + + indent_level = 1; + + for (const List::Element *C = p_api.front(); C; C = C->next()) { + const ClassAPI &class_api = C->get(); + append_indented(source, "{"); + indent_level++; + + append_indented(source, vformat(R"("name": "%s",)", class_api.class_name)); + append_indented(source, vformat(R"("is_instantiable": %s,)", class_api.is_instantiable ? "true" : "false")); + append_indented(source, vformat(R"("is_reference": %s,)", class_api.is_reference ? "true" : "false")); + append_indented(source, vformat(R"("has_indexing": %s,)", class_api.has_indexing ? "true" : "false")); + append_indented(source, vformat(R"("is_keyed": %s,)", class_api.is_keyed ? "true" : "false")); + + // Constructors. + append_indented(source, R"("constructors": [)"); + indent_level++; + for (const List::Element *E = class_api.constructors.front(); E; E = E->next()) { + const MethodAPI &constructor = E->get(); + append_indented(source, "{"); + indent_level++; + + write_builtin_method(source, constructor); + + indent_level--; + append_indented(source, E->next() ? "}," : "}"); + } + indent_level--; + append_indented(source, "],"); + + // Constants. + append_indented(source, R"("constants": [)"); + indent_level++; + for (const List::Element *E = class_api.constants.front(); E; E = E->next()) { + const ConstantAPI &constant = E->get(); + append_indented(source, "{"); + indent_level++; + + append_indented(source, vformat(R"("name": "%s",)", constant.constant_name)); + append_indented(source, vformat(R"("type": "%s",)", constant.builtin_constant_type)); + append_indented(source, vformat(R"("value": "%s")", constant.builtin_constant_value.operator String())); + + indent_level--; + append_indented(source, E->next() ? "}," : "}"); + } + indent_level--; + append_indented(source, "],"); + + // Methods. + append_indented(source, R"("methods": [)"); + indent_level++; + for (const List::Element *E = class_api.methods.front(); E; E = E->next()) { + const MethodAPI &method = E->get(); + append_indented(source, "{"); + indent_level++; + + write_builtin_method(source, method); + + indent_level--; + append_indented(source, E->next() ? "}," : "}"); + } + indent_level--; + append_indented(source, "],"); + + // Members. + append_indented(source, R"("members": [)"); + indent_level++; + for (const List::Element *E = class_api.properties.front(); E; E = E->next()) { + const PropertyAPI &member = E->get(); + append_indented(source, "{"); + indent_level++; + + append_indented(source, vformat(R"("name": "%s",)", member.name)); + append_indented(source, vformat(R"("type": "%s")", member.type)); + + indent_level--; + append_indented(source, E->next() ? "}," : "}"); + } + indent_level--; + append_indented(source, "],"); + + // Operators. + append_indented(source, R"("operators": [)"); + indent_level++; + for (const List::Element *E = class_api.operators.front(); E; E = E->next()) { + const OperatorAPI &oper = E->get(); + append_indented(source, "{"); + indent_level++; + + append_indented(source, vformat(R"("name": "%s",)", oper.name)); + append_indented(source, vformat(R"("operator": %d,)", oper.oper)); + append_indented(source, vformat(R"("other_type": "%s",)", oper.other_type)); + append_indented(source, vformat(R"("return_type": "%s")", oper.return_type)); + + indent_level--; + append_indented(source, E->next() ? "}," : "}"); + } + indent_level--; + append_indented(source, "]"); + + indent_level--; + append_indented(source, C->next() ? "}," : "}"); + } + + indent_level--; + source.append("]\n"); + + List result; + result.push_back(source.as_string()); + return result; +} + #endif /* @@ -526,3 +886,19 @@ Error generate_c_api(const String &p_path) { return save_file(p_path, json_source); #endif } +/* + * Saves the builtin Godot API to a JSON file located at + * p_path + */ +Error generate_c_builtin_api(const String &p_path) { +#ifndef TOOLS_ENABLED + return ERR_BUG; +#else + + List api = generate_c_builtin_api_types(); + + List json_source = generate_c_builtin_api_json(api); + + return save_file(p_path, json_source); +#endif +} -- cgit v1.2.3