text: /*************************************************************************/
  /*  script_language.h                                                    */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2018 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 "map.h"
  #include "pair.h"
  #include "resource.h"
  /**
  	@author Juan Linietsky <reduzio@gmail.com>
  */
  
  class ScriptLanguage;
  
  typedef void (*ScriptEditRequestFunction)(const String &p_path);
  
  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;
  
  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 init_languages();
  	static void finish_languages();
  };
  
  class ScriptInstance;
  class PlaceHolderScriptInstance;
  
  class Script : public Resource {
  
  	GDCLASS(Script, Resource);
  	OBJ_SAVE_TYPE(Script);
  
  protected:
  	virtual bool editor_can_reload_from_file() { 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) {}
  
  public:
  	virtual bool can_instance() const = 0;
  
  	virtual Ref<Script> get_base_script() const = 0; //for script inheritance
  
  	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 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 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) {}
  
  	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 = NULL) const = 0;
  
  	virtual Object *get_owner() { return NULL; }
  	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, Variant::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;
  
  	//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; }
  
  	enum RPCMode {
  		RPC_MODE_DISABLED,
  		RPC_MODE_REMOTE,
  		RPC_MODE_SYNC,
  		RPC_MODE_MASTER,
  		RPC_MODE_SLAVE,
  	};
  
  	virtual RPCMode get_rpc_mode(const StringName &p_method) const = 0;
  	virtual RPCMode get_rset_mode(const StringName &p_variable) const = 0;
  
  	virtual ScriptLanguage *get_language() = 0;
  	virtual ~ScriptInstance();
  };
  
  class ScriptCodeCompletionCache {
  
  	static ScriptCodeCompletionCache *singleton;
  
  public:
  	virtual RES get_cached_resource(const String &p_path) = 0;
  
  	static ScriptCodeCompletionCache *get_singleton() { return singleton; }
  
  	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 */
  	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 = NULL) const = 0;
  	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 PoolStringArray &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_base_path, Object *p_owner, List<String> *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
  		};
  		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_base_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;
  
  	/* 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 */
  
  	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 NULL; }
  	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;
  
  	struct StackInfo {
  		String file;
  		String func;
  		int line;
  	};
  
  	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 NULL; } //optional, not used by all languages
  	virtual void free_instance_binding_data(void *p_data) {} //optional, not used by all languages
  
  	virtual void frame();
  
  	virtual ~ScriptLanguage(){};
  };
  
  extern uint8_t script_encryption_key[32];
  
  class PlaceHolderScriptInstance : public ScriptInstance {
  
  	Object *owner;
  	List<PropertyInfo> properties;
  	Map<StringName, Variant> values;
  	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 = NULL) const;
  
  	virtual void get_method_list(List<MethodInfo> *p_list) const {}
  	virtual bool has_method(const StringName &p_method) const { return false; }
  	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, Variant::CallError &r_error) {
  		r_error.error = Variant::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,Variant::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 RPCMode get_rpc_mode(const StringName &p_method) const { return RPC_MODE_DISABLED; }
  	virtual RPCMode get_rset_mode(const StringName &p_variable) const { return RPC_MODE_DISABLED; }
  
  	PlaceHolderScriptInstance(ScriptLanguage *p_language, Ref<Script> p_script, Object *p_owner);
  	~PlaceHolderScriptInstance();
  };
  
  class ScriptDebugger {
  
  	int lines_left;
  	int depth;
  
  	static ScriptDebugger *singleton;
  	Map<int, Set<StringName> > breakpoints;
  
  	ScriptLanguage *break_lang;
  
  public:
  	typedef void (*RequestSceneTreeMessageFunc)(void *);
  
  	struct LiveEditFuncs {
  
  		void *udata;
  		void (*node_path_func)(void *, const NodePath &p_path, int p_id);
  		void (*res_path_func)(void *, const String &p_path, int p_id);
  
  		void (*node_set_func)(void *, int p_id, const StringName &p_prop, const Variant &p_value);
  		void (*node_set_res_func)(void *, int p_id, const StringName &p_prop, const String &p_value);
  		void (*node_call_func)(void *, int p_id, const StringName &p_method, VARIANT_ARG_DECLARE);
  		void (*res_set_func)(void *, int p_id, const StringName &p_prop, const Variant &p_value);
  		void (*res_set_res_func)(void *, int p_id, const StringName &p_prop, const String &p_value);
  		void (*res_call_func)(void *, int p_id, const StringName &p_method, VARIANT_ARG_DECLARE);
  		void (*root_func)(void *, const NodePath &p_scene_path, const String &p_scene_from);
  
  		void (*tree_create_node_func)(void *, const NodePath &p_parent, const String &p_type, const String &p_name);
  		void (*tree_instance_node_func)(void *, const NodePath &p_parent, const String &p_path, const String &p_name);
  		void (*tree_remove_node_func)(void *, const NodePath &p_at);
  		void (*tree_remove_and_keep_node_func)(void *, const NodePath &p_at, ObjectID p_keep_id);
  		void (*tree_restore_node_func)(void *, ObjectID p_id, const NodePath &p_at, int p_at_pos);
  		void (*tree_duplicate_node_func)(void *, const NodePath &p_at, const String &p_new_name);
  		void (*tree_reparent_node_func)(void *, const NodePath &p_at, const NodePath &p_new_place, const String &p_new_name, int p_at_pos);
  	};
  
  	_FORCE_INLINE_ static ScriptDebugger *get_singleton() { return singleton; }
  	void set_lines_left(int p_left);
  	int get_lines_left() const;
  
  	void set_depth(int p_depth);
  	int get_depth() const;
  
  	String breakpoint_find_source(const String &p_source) const;
  	void insert_breakpoint(int p_line, const StringName &p_source);
  	void remove_breakpoint(int p_line, const StringName &p_source);
  	bool is_breakpoint(int p_line, const StringName &p_source) const;
  	bool is_breakpoint_line(int p_line) const;
  	void clear_breakpoints();
  
  	virtual void debug(ScriptLanguage *p_script, bool p_can_continue = true) = 0;
  	virtual void idle_poll();
  	virtual void line_poll();
  
  	void set_break_language(ScriptLanguage *p_lang);
  	ScriptLanguage *get_break_language() const;
  
  	virtual void send_message(const String &p_message, const Array &p_args) = 0;
  	virtual void send_error(const String &p_func, const String &p_file, int p_line, const String &p_err, const String &p_descr, ErrorHandlerType p_type, const Vector<ScriptLanguage::StackInfo> &p_stack_info) = 0;
  
  	virtual bool is_remote() const { return false; }
  	virtual void request_quit() {}
  
  	virtual void set_request_scene_tree_message_func(RequestSceneTreeMessageFunc p_func, void *p_udata) {}
  	virtual void set_live_edit_funcs(LiveEditFuncs *p_funcs) {}
  
  	virtual bool is_profiling() const = 0;
  	virtual void add_profiling_frame_data(const StringName &p_name, const Array &p_data) = 0;
  	virtual void profiling_start() = 0;
  	virtual void profiling_end() = 0;
  	virtual void profiling_set_frame_times(float p_frame_time, float p_idle_time, float p_physics_time, float p_physics_frame_time) = 0;
  
  	ScriptDebugger();
  	virtual ~ScriptDebugger() { singleton = NULL; }
  };
  
  #endif
  