godot/core/script_language.h

/*************************************************************************/
/*  script_language.h                                                    */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* 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:                                             */
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/* 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.*/
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
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/*************************************************************************/
#ifndef SCRIPT_LANGUAGE_H
#define SCRIPT_LANGUAGE_H

#include "resource.h"
#include "map.h"
#include "pair.h"
/**
	@author Juan Linietsky <reduzio@gmail.com>
*/

class ScriptLanguage;

class ScriptServer {
	enum {
		
		MAX_LANGUAGES=4
	};
	
	static ScriptLanguage *_languages[MAX_LANGUAGES];
	static int _language_count;
	static bool scripting_enabled;
public:	
	
	static void set_scripting_enabled(bool p_enabled);
	static bool is_scripting_enabled();
	static int get_language_count();
	static ScriptLanguage *get_language(int p_idx);
	static void register_language(ScriptLanguage *p_language);

	static void init_languages();
};



class ScriptInstance;
class PlaceHolderScriptInstance;

class Script : public Resource {

	OBJ_TYPE( Script, Resource );
	OBJ_SAVE_TYPE( Script );

protected:

	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 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()=0;

	virtual bool is_tool() const=0;

	virtual String get_node_type() const=0;

	virtual ScriptLanguage *get_language() const=0;

	virtual void update_exports() {} //editor tool

	
	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 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;


	virtual Ref<Script> get_script() const=0;

	virtual ScriptLanguage *get_language()=0;
	virtual ~ScriptInstance();
};

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 String get_template(const String& p_class_name, const String& p_base_class_name) const=0;
	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 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 StringArray& p_args) const=0;
	virtual Error complete_code(const String& p_code, const String& p_base_path, Object*p_owner,List<String>* r_options,String& r_call_hint) { return ERR_UNAVAILABLE; }
	virtual void auto_indent_code(String& p_code,int p_from_line,int p_to_line) const=0;

	/* 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 void debug_get_globals(List<String> *p_locals, 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;

	/* 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;

	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 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

	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 *);

	_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 bool is_remote() const { return false; }
	virtual void request_quit() {}

	virtual void set_request_scene_tree_message_func(RequestSceneTreeMessageFunc p_func, void *p_udata) {}

	ScriptDebugger();
	virtual ~ScriptDebugger() {singleton=NULL;}

};



#endif