godot/core/script_language.h
2020-07-10 13:56:54 +01:00

462 lines
20 KiB
C++

/*************************************************************************/
/* script_language.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef SCRIPT_LANGUAGE_H
#define SCRIPT_LANGUAGE_H
#include "core/io/multiplayer_api.h"
#include "core/map.h"
#include "core/pair.h"
#include "core/resource.h"
class ScriptLanguage;
typedef void (*ScriptEditRequestFunction)(const String &p_path);
struct ScriptNetData {
StringName name;
MultiplayerAPI::RPCMode mode;
bool operator==(ScriptNetData const &p_other) const {
return name == p_other.name;
}
};
struct SortNetData {
StringName::AlphCompare compare;
bool operator()(const ScriptNetData &p_a, const ScriptNetData &p_b) const {
return compare(p_a.name, p_b.name);
}
};
class ScriptServer {
enum {
MAX_LANGUAGES = 16
};
static ScriptLanguage *_languages[MAX_LANGUAGES];
static int _language_count;
static bool scripting_enabled;
static bool reload_scripts_on_save;
static bool languages_finished;
struct GlobalScriptClass {
StringName language;
String path;
String base;
};
static HashMap<StringName, GlobalScriptClass> global_classes;
public:
static ScriptEditRequestFunction edit_request_func;
static void set_scripting_enabled(bool p_enabled);
static bool is_scripting_enabled();
_FORCE_INLINE_ static int get_language_count() { return _language_count; }
static ScriptLanguage *get_language(int p_idx);
static void register_language(ScriptLanguage *p_language);
static void unregister_language(ScriptLanguage *p_language);
static void set_reload_scripts_on_save(bool p_enable);
static bool is_reload_scripts_on_save_enabled();
static void thread_enter();
static void thread_exit();
static void global_classes_clear();
static void add_global_class(const StringName &p_class, const StringName &p_base, const StringName &p_language, const String &p_path);
static void remove_global_class(const StringName &p_class);
static bool is_global_class(const StringName &p_class);
static StringName get_global_class_language(const StringName &p_class);
static String get_global_class_path(const String &p_class);
static StringName get_global_class_base(const String &p_class);
static StringName get_global_class_native_base(const String &p_class);
static void get_global_class_list(List<StringName> *r_global_classes);
static void save_global_classes();
static void init_languages();
static void finish_languages();
static bool are_languages_finished() { return languages_finished; }
};
class ScriptInstance;
class PlaceHolderScriptInstance;
class Script : public Resource {
GDCLASS(Script, Resource);
OBJ_SAVE_TYPE(Script);
protected:
virtual bool editor_can_reload_from_file() override { return false; } // this is handled by editor better
void _notification(int p_what);
static void _bind_methods();
friend class PlaceHolderScriptInstance;
virtual void _placeholder_erased(PlaceHolderScriptInstance *p_placeholder) {}
Variant _get_property_default_value(const StringName &p_property);
Array _get_script_property_list();
Array _get_script_method_list();
Array _get_script_signal_list();
Dictionary _get_script_constant_map();
public:
virtual bool can_instance() const = 0;
virtual Ref<Script> get_base_script() const = 0; //for script inheritance
virtual bool inherits_script(const Ref<Script> &p_script) const = 0;
virtual StringName get_instance_base_type() const = 0; // this may not work in all scripts, will return empty if so
virtual ScriptInstance *instance_create(Object *p_this) = 0;
virtual PlaceHolderScriptInstance *placeholder_instance_create(Object *p_this) { return nullptr; }
virtual bool instance_has(const Object *p_this) const = 0;
virtual bool has_source_code() const = 0;
virtual String get_source_code() const = 0;
virtual void set_source_code(const String &p_code) = 0;
virtual Error reload(bool p_keep_state = false) = 0;
virtual bool has_method(const StringName &p_method) const = 0;
virtual MethodInfo get_method_info(const StringName &p_method) const = 0;
virtual bool is_tool() const = 0;
virtual bool is_valid() const = 0;
virtual ScriptLanguage *get_language() const = 0;
virtual bool has_script_signal(const StringName &p_signal) const = 0;
virtual void get_script_signal_list(List<MethodInfo> *r_signals) const = 0;
virtual bool get_property_default_value(const StringName &p_property, Variant &r_value) const = 0;
virtual void update_exports() {} //editor tool
virtual void get_script_method_list(List<MethodInfo> *p_list) const = 0;
virtual void get_script_property_list(List<PropertyInfo> *p_list) const = 0;
virtual int get_member_line(const StringName &p_member) const { return -1; }
virtual void get_constants(Map<StringName, Variant> *p_constants) {}
virtual void get_members(Set<StringName> *p_constants) {}
virtual bool is_placeholder_fallback_enabled() const { return false; }
virtual Vector<ScriptNetData> get_rpc_methods() const = 0;
virtual uint16_t get_rpc_method_id(const StringName &p_method) const = 0;
virtual StringName get_rpc_method(const uint16_t p_rpc_method_id) const = 0;
virtual MultiplayerAPI::RPCMode get_rpc_mode_by_id(const uint16_t p_rpc_method_id) const = 0;
virtual MultiplayerAPI::RPCMode get_rpc_mode(const StringName &p_method) const = 0;
virtual Vector<ScriptNetData> get_rset_properties() const = 0;
virtual uint16_t get_rset_property_id(const StringName &p_property) const = 0;
virtual StringName get_rset_property(const uint16_t p_rset_property_id) const = 0;
virtual MultiplayerAPI::RPCMode get_rset_mode_by_id(const uint16_t p_rpc_method_id) const = 0;
virtual MultiplayerAPI::RPCMode get_rset_mode(const StringName &p_variable) const = 0;
Script() {}
};
class ScriptInstance {
public:
virtual bool set(const StringName &p_name, const Variant &p_value) = 0;
virtual bool get(const StringName &p_name, Variant &r_ret) const = 0;
virtual void get_property_list(List<PropertyInfo> *p_properties) const = 0;
virtual Variant::Type get_property_type(const StringName &p_name, bool *r_is_valid = nullptr) const = 0;
virtual Object *get_owner() { return nullptr; }
virtual void get_property_state(List<Pair<StringName, Variant>> &state);
virtual void get_method_list(List<MethodInfo> *p_list) const = 0;
virtual bool has_method(const StringName &p_method) const = 0;
virtual Variant call(const StringName &p_method, VARIANT_ARG_LIST);
virtual Variant call(const StringName &p_method, const Variant **p_args, int p_argcount, Callable::CallError &r_error) = 0;
virtual void call_multilevel(const StringName &p_method, VARIANT_ARG_LIST);
virtual void call_multilevel(const StringName &p_method, const Variant **p_args, int p_argcount);
virtual void call_multilevel_reversed(const StringName &p_method, const Variant **p_args, int p_argcount);
virtual void notification(int p_notification) = 0;
virtual String to_string(bool *r_valid) {
if (r_valid) {
*r_valid = false;
}
return String();
}
//this is used by script languages that keep a reference counter of their own
//you can make make Ref<> not die when it reaches zero, so deleting the reference
//depends entirely from the script
virtual void refcount_incremented() {}
virtual bool refcount_decremented() { return true; } //return true if it can die
virtual Ref<Script> get_script() const = 0;
virtual bool is_placeholder() const { return false; }
virtual void property_set_fallback(const StringName &p_name, const Variant &p_value, bool *r_valid);
virtual Variant property_get_fallback(const StringName &p_name, bool *r_valid);
virtual Vector<ScriptNetData> get_rpc_methods() const = 0;
virtual uint16_t get_rpc_method_id(const StringName &p_method) const = 0;
virtual StringName get_rpc_method(uint16_t p_id) const = 0;
virtual MultiplayerAPI::RPCMode get_rpc_mode_by_id(uint16_t p_id) const = 0;
virtual MultiplayerAPI::RPCMode get_rpc_mode(const StringName &p_method) const = 0;
virtual Vector<ScriptNetData> get_rset_properties() const = 0;
virtual uint16_t get_rset_property_id(const StringName &p_variable) const = 0;
virtual StringName get_rset_property(uint16_t p_id) const = 0;
virtual MultiplayerAPI::RPCMode get_rset_mode_by_id(uint16_t p_id) const = 0;
virtual MultiplayerAPI::RPCMode get_rset_mode(const StringName &p_variable) const = 0;
virtual ScriptLanguage *get_language() = 0;
virtual ~ScriptInstance();
};
struct ScriptCodeCompletionOption {
enum Kind {
KIND_CLASS,
KIND_FUNCTION,
KIND_SIGNAL,
KIND_VARIABLE,
KIND_MEMBER,
KIND_ENUM,
KIND_CONSTANT,
KIND_NODE_PATH,
KIND_FILE_PATH,
KIND_PLAIN_TEXT,
};
Kind kind = KIND_PLAIN_TEXT;
String display;
String insert_text;
RES icon;
ScriptCodeCompletionOption() {}
ScriptCodeCompletionOption(const String &p_text, Kind p_kind) {
display = p_text;
insert_text = p_text;
kind = p_kind;
}
};
class ScriptCodeCompletionCache {
static ScriptCodeCompletionCache *singleton;
public:
virtual RES get_cached_resource(const String &p_path) = 0;
static ScriptCodeCompletionCache *get_singleton() { return singleton; }
ScriptCodeCompletionCache();
virtual ~ScriptCodeCompletionCache() {}
};
class ScriptLanguage {
public:
virtual String get_name() const = 0;
/* LANGUAGE FUNCTIONS */
virtual void init() = 0;
virtual String get_type() const = 0;
virtual String get_extension() const = 0;
virtual Error execute_file(const String &p_path) = 0;
virtual void finish() = 0;
/* EDITOR FUNCTIONS */
struct Warning {
int line;
int code;
String string_code;
String message;
};
virtual void get_reserved_words(List<String> *p_words) const = 0;
virtual void get_comment_delimiters(List<String> *p_delimiters) const = 0;
virtual void get_string_delimiters(List<String> *p_delimiters) const = 0;
virtual Ref<Script> get_template(const String &p_class_name, const String &p_base_class_name) const = 0;
virtual void make_template(const String &p_class_name, const String &p_base_class_name, Ref<Script> &p_script) {}
virtual bool is_using_templates() { return false; }
virtual bool validate(const String &p_script, int &r_line_error, int &r_col_error, String &r_test_error, const String &p_path = "", List<String> *r_functions = nullptr, List<Warning> *r_warnings = nullptr, Set<int> *r_safe_lines = nullptr) const = 0;
virtual String validate_path(const String &p_path) const { return ""; }
virtual Script *create_script() const = 0;
virtual bool has_named_classes() const = 0;
virtual bool supports_builtin_mode() const = 0;
virtual bool can_inherit_from_file() { return false; }
virtual int find_function(const String &p_function, const String &p_code) const = 0;
virtual String make_function(const String &p_class, const String &p_name, const PackedStringArray &p_args) const = 0;
virtual Error open_in_external_editor(const Ref<Script> &p_script, int p_line, int p_col) { return ERR_UNAVAILABLE; }
virtual bool overrides_external_editor() { return false; }
virtual Error complete_code(const String &p_code, const String &p_path, Object *p_owner, List<ScriptCodeCompletionOption> *r_options, bool &r_force, String &r_call_hint) { return ERR_UNAVAILABLE; }
struct LookupResult {
enum Type {
RESULT_SCRIPT_LOCATION,
RESULT_CLASS,
RESULT_CLASS_CONSTANT,
RESULT_CLASS_PROPERTY,
RESULT_CLASS_METHOD,
RESULT_CLASS_ENUM,
RESULT_CLASS_TBD_GLOBALSCOPE
};
Type type;
Ref<Script> script;
String class_name;
String class_member;
int location;
};
virtual Error lookup_code(const String &p_code, const String &p_symbol, const String &p_path, Object *p_owner, LookupResult &r_result) { return ERR_UNAVAILABLE; }
virtual void auto_indent_code(String &p_code, int p_from_line, int p_to_line) const = 0;
virtual void add_global_constant(const StringName &p_variable, const Variant &p_value) = 0;
virtual void add_named_global_constant(const StringName &p_name, const Variant &p_value) {}
virtual void remove_named_global_constant(const StringName &p_name) {}
/* MULTITHREAD FUNCTIONS */
//some VMs need to be notified of thread creation/exiting to allocate a stack
virtual void thread_enter() {}
virtual void thread_exit() {}
/* DEBUGGER FUNCTIONS */
struct StackInfo {
String file;
String func;
int line;
};
virtual String debug_get_error() const = 0;
virtual int debug_get_stack_level_count() const = 0;
virtual int debug_get_stack_level_line(int p_level) const = 0;
virtual String debug_get_stack_level_function(int p_level) const = 0;
virtual String debug_get_stack_level_source(int p_level) const = 0;
virtual void debug_get_stack_level_locals(int p_level, List<String> *p_locals, List<Variant> *p_values, int p_max_subitems = -1, int p_max_depth = -1) = 0;
virtual void debug_get_stack_level_members(int p_level, List<String> *p_members, List<Variant> *p_values, int p_max_subitems = -1, int p_max_depth = -1) = 0;
virtual ScriptInstance *debug_get_stack_level_instance(int p_level) { return nullptr; }
virtual void debug_get_globals(List<String> *p_globals, List<Variant> *p_values, int p_max_subitems = -1, int p_max_depth = -1) = 0;
virtual String debug_parse_stack_level_expression(int p_level, const String &p_expression, int p_max_subitems = -1, int p_max_depth = -1) = 0;
virtual Vector<StackInfo> debug_get_current_stack_info() { return Vector<StackInfo>(); }
virtual void reload_all_scripts() = 0;
virtual void reload_tool_script(const Ref<Script> &p_script, bool p_soft_reload) = 0;
/* LOADER FUNCTIONS */
virtual void get_recognized_extensions(List<String> *p_extensions) const = 0;
virtual void get_public_functions(List<MethodInfo> *p_functions) const = 0;
virtual void get_public_constants(List<Pair<String, Variant>> *p_constants) const = 0;
struct ProfilingInfo {
StringName signature;
uint64_t call_count;
uint64_t total_time;
uint64_t self_time;
};
virtual void profiling_start() = 0;
virtual void profiling_stop() = 0;
virtual int profiling_get_accumulated_data(ProfilingInfo *p_info_arr, int p_info_max) = 0;
virtual int profiling_get_frame_data(ProfilingInfo *p_info_arr, int p_info_max) = 0;
virtual void *alloc_instance_binding_data(Object *p_object) { return nullptr; } //optional, not used by all languages
virtual void free_instance_binding_data(void *p_data) {} //optional, not used by all languages
virtual void refcount_incremented_instance_binding(Object *p_object) {} //optional, not used by all languages
virtual bool refcount_decremented_instance_binding(Object *p_object) { return true; } //return true if it can die //optional, not used by all languages
virtual void frame();
virtual bool handles_global_class_type(const String &p_type) const { return false; }
virtual String get_global_class_name(const String &p_path, String *r_base_type = nullptr, String *r_icon_path = nullptr) const { return String(); }
virtual ~ScriptLanguage() {}
};
extern uint8_t script_encryption_key[32];
class PlaceHolderScriptInstance : public ScriptInstance {
Object *owner;
List<PropertyInfo> properties;
Map<StringName, Variant> values;
Map<StringName, Variant> constants;
ScriptLanguage *language;
Ref<Script> script;
public:
virtual bool set(const StringName &p_name, const Variant &p_value);
virtual bool get(const StringName &p_name, Variant &r_ret) const;
virtual void get_property_list(List<PropertyInfo> *p_properties) const;
virtual Variant::Type get_property_type(const StringName &p_name, bool *r_is_valid = nullptr) const;
virtual void get_method_list(List<MethodInfo> *p_list) const;
virtual bool has_method(const StringName &p_method) const;
virtual Variant call(const StringName &p_method, VARIANT_ARG_LIST) { return Variant(); }
virtual Variant call(const StringName &p_method, const Variant **p_args, int p_argcount, Callable::CallError &r_error) {
r_error.error = Callable::CallError::CALL_ERROR_INVALID_METHOD;
return Variant();
}
//virtual void call_multilevel(const StringName& p_method,VARIANT_ARG_LIST) { return Variant(); }
//virtual void call_multilevel(const StringName& p_method,const Variant** p_args,int p_argcount,Callable::CallError &r_error) { return Variant(); }
virtual void notification(int p_notification) {}
virtual Ref<Script> get_script() const { return script; }
virtual ScriptLanguage *get_language() { return language; }
Object *get_owner() { return owner; }
void update(const List<PropertyInfo> &p_properties, const Map<StringName, Variant> &p_values); //likely changed in editor
virtual bool is_placeholder() const { return true; }
virtual void property_set_fallback(const StringName &p_name, const Variant &p_value, bool *r_valid = nullptr);
virtual Variant property_get_fallback(const StringName &p_name, bool *r_valid = nullptr);
virtual Vector<ScriptNetData> get_rpc_methods() const { return Vector<ScriptNetData>(); }
virtual uint16_t get_rpc_method_id(const StringName &p_method) const;
virtual StringName get_rpc_method(uint16_t p_id) const { return StringName(); }
virtual MultiplayerAPI::RPCMode get_rpc_mode_by_id(uint16_t p_id) const { return MultiplayerAPI::RPC_MODE_DISABLED; }
virtual MultiplayerAPI::RPCMode get_rpc_mode(const StringName &p_method) const { return MultiplayerAPI::RPC_MODE_DISABLED; }
virtual Vector<ScriptNetData> get_rset_properties() const { return Vector<ScriptNetData>(); }
virtual uint16_t get_rset_property_id(const StringName &p_variable) const;
virtual StringName get_rset_property(uint16_t p_id) const { return StringName(); }
virtual MultiplayerAPI::RPCMode get_rset_mode_by_id(uint16_t p_id) const { return MultiplayerAPI::RPC_MODE_DISABLED; }
virtual MultiplayerAPI::RPCMode get_rset_mode(const StringName &p_variable) const { return MultiplayerAPI::RPC_MODE_DISABLED; }
PlaceHolderScriptInstance(ScriptLanguage *p_language, Ref<Script> p_script, Object *p_owner);
~PlaceHolderScriptInstance();
};
#endif // SCRIPT_LANGUAGE_H