525 lines
18 KiB
C++
525 lines
18 KiB
C++
/*************************************************************************/
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/* api_generator.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "api_generator.h"
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#ifdef TOOLS_ENABLED
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#include "core/class_db.h"
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#include "core/engine.h"
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#include "core/global_constants.h"
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#include "core/pair.h"
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#include "os/file_access.h"
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// helper stuff
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static Error save_file(const String &p_path, const List<String> &p_content) {
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FileAccessRef file = FileAccess::open(p_path, FileAccess::WRITE);
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ERR_FAIL_COND_V(!file, ERR_FILE_CANT_WRITE);
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for (const List<String>::Element *e = p_content.front(); e != NULL; e = e->next()) {
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file->store_string(e->get());
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}
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file->close();
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return OK;
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}
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// helper stuff end
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struct MethodAPI {
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String method_name;
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String return_type;
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List<String> argument_types;
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List<String> argument_names;
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Map<int, Variant> default_arguments;
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int argument_count;
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bool has_varargs;
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bool is_editor;
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bool is_noscript;
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bool is_const;
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bool is_reverse;
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bool is_virtual;
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bool is_from_script;
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};
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struct PropertyAPI {
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String name;
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String getter;
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String setter;
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String type;
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int index;
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};
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struct ConstantAPI {
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String constant_name;
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int constant_value;
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};
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struct SignalAPI {
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String name;
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List<String> argument_types;
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List<String> argument_names;
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Map<int, Variant> default_arguments;
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};
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struct EnumAPI {
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String name;
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List<Pair<int, String> > values;
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};
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struct ClassAPI {
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String class_name;
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String super_class_name;
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ClassDB::APIType api_type;
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bool is_singleton;
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bool is_instanciable;
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// @Unclear
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bool is_creatable;
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bool is_reference;
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List<MethodAPI> methods;
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List<PropertyAPI> properties;
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List<ConstantAPI> constants;
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List<SignalAPI> signals_;
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List<EnumAPI> enums;
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};
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static String get_type_name(const PropertyInfo &info) {
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if (info.type == Variant::INT && (info.usage & PROPERTY_USAGE_CLASS_IS_ENUM)) {
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return String("enum.") + String(info.class_name).replace(".", "::");
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}
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if (info.class_name != StringName()) {
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return info.class_name;
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}
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if (info.hint == PROPERTY_HINT_RESOURCE_TYPE) {
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return info.hint_string;
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}
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if (info.type == Variant::NIL && (info.usage & PROPERTY_USAGE_NIL_IS_VARIANT)) {
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return "Variant";
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}
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if (info.type == Variant::NIL) {
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return "void";
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}
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return Variant::get_type_name(info.type);
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}
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/*
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* Some comparison helper functions we need
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*/
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struct MethodInfoComparator {
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StringName::AlphCompare compare;
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bool operator()(const MethodInfo &p_a, const MethodInfo &p_b) const {
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return compare(p_a.name, p_b.name);
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}
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};
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struct PropertyInfoComparator {
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StringName::AlphCompare compare;
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bool operator()(const PropertyInfo &p_a, const PropertyInfo &p_b) const {
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return compare(p_a.name, p_b.name);
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}
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};
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struct ConstantAPIComparator {
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NoCaseComparator compare;
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bool operator()(const ConstantAPI &p_a, const ConstantAPI &p_b) const {
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return compare(p_a.constant_name, p_b.constant_name);
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}
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};
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/*
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* Reads the entire Godot API to a list
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*/
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List<ClassAPI> generate_c_api_classes() {
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List<ClassAPI> api;
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List<StringName> classes;
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ClassDB::get_class_list(&classes);
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classes.sort_custom<StringName::AlphCompare>();
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// Register global constants as a fake GlobalConstants singleton class
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{
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ClassAPI global_constants_api;
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global_constants_api.class_name = L"GlobalConstants";
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global_constants_api.api_type = ClassDB::API_CORE;
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global_constants_api.is_singleton = true;
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global_constants_api.is_instanciable = false;
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const int constants_count = GlobalConstants::get_global_constant_count();
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for (int i = 0; i < constants_count; ++i) {
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ConstantAPI constant_api;
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constant_api.constant_name = GlobalConstants::get_global_constant_name(i);
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constant_api.constant_value = GlobalConstants::get_global_constant_value(i);
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global_constants_api.constants.push_back(constant_api);
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}
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global_constants_api.constants.sort_custom<ConstantAPIComparator>();
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api.push_back(global_constants_api);
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}
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for (List<StringName>::Element *e = classes.front(); e != NULL; e = e->next()) {
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StringName class_name = e->get();
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ClassAPI class_api;
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class_api.api_type = ClassDB::get_api_type(e->get());
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class_api.class_name = class_name;
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class_api.super_class_name = ClassDB::get_parent_class(class_name);
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{
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String name = class_name;
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if (name.begins_with("_")) {
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name.remove(0);
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}
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class_api.is_singleton = Engine::get_singleton()->has_singleton(name);
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}
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class_api.is_instanciable = !class_api.is_singleton && ClassDB::can_instance(class_name);
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{
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List<StringName> inheriters;
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ClassDB::get_inheriters_from_class("Reference", &inheriters);
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bool is_reference = !!inheriters.find(class_name);
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// @Unclear
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class_api.is_reference = !class_api.is_singleton && is_reference;
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}
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// constants
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{
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List<String> constant;
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ClassDB::get_integer_constant_list(class_name, &constant, true);
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constant.sort_custom<NoCaseComparator>();
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for (List<String>::Element *c = constant.front(); c != NULL; c = c->next()) {
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ConstantAPI constant_api;
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constant_api.constant_name = c->get();
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constant_api.constant_value = ClassDB::get_integer_constant(class_name, c->get());
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class_api.constants.push_back(constant_api);
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}
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}
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// signals
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{
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List<MethodInfo> signals_;
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ClassDB::get_signal_list(class_name, &signals_, true);
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signals_.sort_custom<MethodInfoComparator>();
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for (int i = 0; i < signals_.size(); i++) {
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SignalAPI signal;
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MethodInfo method_info = signals_[i];
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signal.name = method_info.name;
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for (int j = 0; j < method_info.arguments.size(); j++) {
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PropertyInfo argument = method_info.arguments[j];
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String type;
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String name = argument.name;
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if (argument.name.find(":") != -1) {
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type = argument.name.get_slice(":", 1);
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name = argument.name.get_slice(":", 0);
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} else {
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type = get_type_name(argument);
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}
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signal.argument_names.push_back(name);
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signal.argument_types.push_back(type);
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}
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Vector<Variant> default_arguments = method_info.default_arguments;
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int default_start = signal.argument_names.size() - default_arguments.size();
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for (int j = 0; j < default_arguments.size(); j++) {
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signal.default_arguments[default_start + j] = default_arguments[j];
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}
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class_api.signals_.push_back(signal);
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}
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}
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//properties
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{
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List<PropertyInfo> properties;
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ClassDB::get_property_list(class_name, &properties, true);
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properties.sort_custom<PropertyInfoComparator>();
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for (List<PropertyInfo>::Element *p = properties.front(); p != NULL; p = p->next()) {
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PropertyAPI property_api;
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property_api.name = p->get().name;
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property_api.getter = ClassDB::get_property_getter(class_name, p->get().name);
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property_api.setter = ClassDB::get_property_setter(class_name, p->get().name);
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if (p->get().name.find(":") != -1) {
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property_api.type = p->get().name.get_slice(":", 1);
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property_api.name = p->get().name.get_slice(":", 0);
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} else {
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property_api.type = get_type_name(p->get());
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}
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property_api.index = ClassDB::get_property_index(class_name, p->get().name);
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if (!property_api.setter.empty() || !property_api.getter.empty()) {
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class_api.properties.push_back(property_api);
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}
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}
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}
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//methods
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{
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List<MethodInfo> methods;
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ClassDB::get_method_list(class_name, &methods, true);
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methods.sort_custom<MethodInfoComparator>();
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for (List<MethodInfo>::Element *m = methods.front(); m != NULL; m = m->next()) {
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MethodAPI method_api;
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MethodBind *method_bind = ClassDB::get_method(class_name, m->get().name);
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MethodInfo &method_info = m->get();
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//method name
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method_api.method_name = m->get().name;
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//method return type
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if (method_api.method_name.find(":") != -1) {
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method_api.return_type = method_api.method_name.get_slice(":", 1);
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method_api.method_name = method_api.method_name.get_slice(":", 0);
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} else {
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method_api.return_type = get_type_name(m->get().return_val);
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}
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method_api.argument_count = method_info.arguments.size();
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method_api.has_varargs = method_bind && method_bind->is_vararg();
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// Method flags
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if (method_info.flags) {
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const uint32_t flags = method_info.flags;
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method_api.is_editor = flags & METHOD_FLAG_EDITOR;
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method_api.is_noscript = flags & METHOD_FLAG_NOSCRIPT;
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method_api.is_const = flags & METHOD_FLAG_CONST;
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method_api.is_reverse = flags & METHOD_FLAG_REVERSE;
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method_api.is_virtual = flags & METHOD_FLAG_VIRTUAL;
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method_api.is_from_script = flags & METHOD_FLAG_FROM_SCRIPT;
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}
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method_api.is_virtual = method_api.is_virtual || method_api.method_name[0] == '_';
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// method argument name and type
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for (int i = 0; i < method_api.argument_count; i++) {
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String arg_name;
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String arg_type;
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PropertyInfo arg_info = method_info.arguments[i];
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arg_name = arg_info.name;
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if (arg_info.name.find(":") != -1) {
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arg_type = arg_info.name.get_slice(":", 1);
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arg_name = arg_info.name.get_slice(":", 0);
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} else if (arg_info.hint == PROPERTY_HINT_RESOURCE_TYPE) {
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arg_type = arg_info.hint_string;
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} else if (arg_info.type == Variant::NIL) {
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arg_type = "Variant";
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} else {
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arg_type = Variant::get_type_name(arg_info.type);
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}
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method_api.argument_names.push_back(arg_name);
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method_api.argument_types.push_back(arg_type);
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if (method_bind && method_bind->has_default_argument(i)) {
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method_api.default_arguments[i] = method_bind->get_default_argument(i);
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}
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}
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class_api.methods.push_back(method_api);
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}
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}
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// enums
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{
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List<EnumAPI> enums;
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List<StringName> enum_names;
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ClassDB::get_enum_list(class_name, &enum_names, true);
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for (List<StringName>::Element *E = enum_names.front(); E; E = E->next()) {
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List<StringName> value_names;
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EnumAPI enum_api;
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enum_api.name = E->get();
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ClassDB::get_enum_constants(class_name, E->get(), &value_names, true);
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for (List<StringName>::Element *val_e = value_names.front(); val_e; val_e = val_e->next()) {
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int int_val = ClassDB::get_integer_constant(class_name, val_e->get(), NULL);
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enum_api.values.push_back(Pair<int, String>(int_val, val_e->get()));
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}
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enum_api.values.sort_custom<PairSort<int, String> >();
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class_api.enums.push_back(enum_api);
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}
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}
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api.push_back(class_api);
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}
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return api;
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}
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/*
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* Generates the JSON source from the API in p_api
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*/
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static List<String> generate_c_api_json(const List<ClassAPI> &p_api) {
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// I'm sorry for the \t mess
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List<String> source;
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source.push_back("[\n");
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for (const List<ClassAPI>::Element *c = p_api.front(); c != NULL; c = c->next()) {
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ClassAPI api = c->get();
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source.push_back("\t{\n");
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source.push_back("\t\t\"name\": \"" + api.class_name + "\",\n");
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source.push_back("\t\t\"base_class\": \"" + api.super_class_name + "\",\n");
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source.push_back(String("\t\t\"api_type\": \"") + (api.api_type == ClassDB::API_CORE ? "core" : (api.api_type == ClassDB::API_EDITOR ? "tools" : "none")) + "\",\n");
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source.push_back(String("\t\t\"singleton\": ") + (api.is_singleton ? "true" : "false") + ",\n");
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source.push_back(String("\t\t\"instanciable\": ") + (api.is_instanciable ? "true" : "false") + ",\n");
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source.push_back(String("\t\t\"is_reference\": ") + (api.is_reference ? "true" : "false") + ",\n");
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// @Unclear
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// source.push_back(String("\t\t\"createable\": ") + (api.is_creatable ? "true" : "false") + ",\n");
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source.push_back("\t\t\"constants\": {\n");
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for (List<ConstantAPI>::Element *e = api.constants.front(); e; e = e->next()) {
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source.push_back("\t\t\t\"" + e->get().constant_name + "\": " + String::num_int64(e->get().constant_value) + (e->next() ? "," : "") + "\n");
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}
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source.push_back("\t\t},\n");
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source.push_back("\t\t\"properties\": [\n");
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for (List<PropertyAPI>::Element *e = api.properties.front(); e; e = e->next()) {
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source.push_back("\t\t\t{\n");
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source.push_back("\t\t\t\t\"name\": \"" + e->get().name + "\",\n");
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source.push_back("\t\t\t\t\"type\": \"" + e->get().type + "\",\n");
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source.push_back("\t\t\t\t\"getter\": \"" + e->get().getter + "\",\n");
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source.push_back("\t\t\t\t\"setter\": \"" + e->get().setter + "\",\n");
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source.push_back(String("\t\t\t\t\"index\": ") + itos(e->get().index) + "\n");
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source.push_back(String("\t\t\t}") + (e->next() ? "," : "") + "\n");
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}
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source.push_back("\t\t],\n");
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source.push_back("\t\t\"signals\": [\n");
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for (List<SignalAPI>::Element *e = api.signals_.front(); e; e = e->next()) {
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source.push_back("\t\t\t{\n");
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source.push_back("\t\t\t\t\"name\": \"" + e->get().name + "\",\n");
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source.push_back("\t\t\t\t\"arguments\": [\n");
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for (int i = 0; i < e->get().argument_names.size(); i++) {
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source.push_back("\t\t\t\t\t{\n");
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source.push_back("\t\t\t\t\t\t\"name\": \"" + e->get().argument_names[i] + "\",\n");
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source.push_back("\t\t\t\t\t\t\"type\": \"" + e->get().argument_types[i] + "\",\n");
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source.push_back("\t\t\t\t\t\t\"default_value\": \"" + (e->get().default_arguments.has(i) ? (String)e->get().default_arguments[i] : "") + "\"\n");
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source.push_back(String("\t\t\t\t\t}") + ((i < e->get().argument_names.size() - 1) ? "," : "") + "\n");
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}
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source.push_back("\t\t\t\t]\n");
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source.push_back(String("\t\t\t}") + (e->next() ? "," : "") + "\n");
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}
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source.push_back("\t\t],\n");
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source.push_back("\t\t\"methods\": [\n");
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for (List<MethodAPI>::Element *e = api.methods.front(); e; e = e->next()) {
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source.push_back("\t\t\t{\n");
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source.push_back("\t\t\t\t\"name\": \"" + e->get().method_name + "\",\n");
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source.push_back("\t\t\t\t\"return_type\": \"" + e->get().return_type + "\",\n");
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source.push_back(String("\t\t\t\t\"is_editor\": ") + (e->get().is_editor ? "true" : "false") + ",\n");
|
|
source.push_back(String("\t\t\t\t\"is_noscript\": ") + (e->get().is_noscript ? "true" : "false") + ",\n");
|
|
source.push_back(String("\t\t\t\t\"is_const\": ") + (e->get().is_const ? "true" : "false") + ",\n");
|
|
source.push_back(String("\t\t\t\t\"is_reverse\": ") + (e->get().is_reverse ? "true" : "false") + ",\n");
|
|
source.push_back(String("\t\t\t\t\"is_virtual\": ") + (e->get().is_virtual ? "true" : "false") + ",\n");
|
|
source.push_back(String("\t\t\t\t\"has_varargs\": ") + (e->get().has_varargs ? "true" : "false") + ",\n");
|
|
source.push_back(String("\t\t\t\t\"is_from_script\": ") + (e->get().is_from_script ? "true" : "false") + ",\n");
|
|
source.push_back("\t\t\t\t\"arguments\": [\n");
|
|
for (int i = 0; i < e->get().argument_names.size(); i++) {
|
|
source.push_back("\t\t\t\t\t{\n");
|
|
source.push_back("\t\t\t\t\t\t\"name\": \"" + e->get().argument_names[i] + "\",\n");
|
|
source.push_back("\t\t\t\t\t\t\"type\": \"" + e->get().argument_types[i] + "\",\n");
|
|
source.push_back(String("\t\t\t\t\t\t\"has_default_value\": ") + (e->get().default_arguments.has(i) ? "true" : "false") + ",\n");
|
|
source.push_back("\t\t\t\t\t\t\"default_value\": \"" + (e->get().default_arguments.has(i) ? (String)e->get().default_arguments[i] : "") + "\"\n");
|
|
source.push_back(String("\t\t\t\t\t}") + ((i < e->get().argument_names.size() - 1) ? "," : "") + "\n");
|
|
}
|
|
source.push_back("\t\t\t\t]\n");
|
|
source.push_back(String("\t\t\t}") + (e->next() ? "," : "") + "\n");
|
|
}
|
|
source.push_back("\t\t],\n");
|
|
|
|
source.push_back("\t\t\"enums\": [\n");
|
|
for (List<EnumAPI>::Element *e = api.enums.front(); e; e = e->next()) {
|
|
source.push_back("\t\t\t{\n");
|
|
source.push_back("\t\t\t\t\"name\": \"" + e->get().name + "\",\n");
|
|
source.push_back("\t\t\t\t\"values\": {\n");
|
|
for (List<Pair<int, String> >::Element *val_e = e->get().values.front(); val_e; val_e = val_e->next()) {
|
|
source.push_back("\t\t\t\t\t\"" + val_e->get().second + "\": " + itos(val_e->get().first));
|
|
source.push_back(String((val_e->next() ? "," : "")) + "\n");
|
|
}
|
|
source.push_back("\t\t\t\t}\n");
|
|
source.push_back(String("\t\t\t}") + (e->next() ? "," : "") + "\n");
|
|
}
|
|
source.push_back("\t\t]\n");
|
|
|
|
source.push_back(String("\t}") + (c->next() ? "," : "") + "\n");
|
|
}
|
|
source.push_back("]");
|
|
|
|
return source;
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Saves the whole Godot API to a JSON file located at
|
|
* p_path
|
|
*/
|
|
Error generate_c_api(const String &p_path) {
|
|
|
|
#ifndef TOOLS_ENABLED
|
|
return ERR_BUG;
|
|
#else
|
|
|
|
List<ClassAPI> api = generate_c_api_classes();
|
|
|
|
List<String> json_source = generate_c_api_json(api);
|
|
|
|
return save_file(p_path, json_source);
|
|
#endif
|
|
}
|