text: /*************************************************************************/
  /*  os_x11.h                                                             */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2022 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,  */
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  /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
  /*************************************************************************/
  
  #ifndef OS_X11_H
  #define OS_X11_H
  
  #include "context_gl_x11.h"
  #include "core/local_vector.h"
  #include "core/os/input.h"
  #include "crash_handler_x11.h"
  #include "drivers/alsa/audio_driver_alsa.h"
  #include "drivers/alsamidi/midi_driver_alsamidi.h"
  #include "drivers/pulseaudio/audio_driver_pulseaudio.h"
  #include "drivers/unix/os_unix.h"
  #include "joypad_linux.h"
  #include "main/input_default.h"
  #include "power_x11.h"
  #include "servers/audio_server.h"
  #include "servers/visual/rasterizer.h"
  #include "servers/visual_server.h"
  
  #include <X11/Xcursor/Xcursor.h>
  #include <X11/Xlib.h>
  #include <X11/extensions/XInput2.h>
  #include <X11/extensions/Xrandr.h>
  #include <X11/keysym.h>
  
  // Hints for X11 fullscreen
  typedef struct {
  	unsigned long flags;
  	unsigned long functions;
  	unsigned long decorations;
  	long inputMode;
  	unsigned long status;
  } Hints;
  
  typedef struct _xrr_monitor_info {
  	Atom name;
  	Bool primary;
  	Bool automatic;
  	int noutput;
  	int x;
  	int y;
  	int width;
  	int height;
  	int mwidth;
  	int mheight;
  	RROutput *outputs;
  } xrr_monitor_info;
  
  #undef CursorShape
  
  class OS_X11 : public OS_Unix {
  	Atom wm_delete;
  	Atom xdnd_enter;
  	Atom xdnd_position;
  	Atom xdnd_status;
  	Atom xdnd_action_copy;
  	Atom xdnd_drop;
  	Atom xdnd_finished;
  	Atom xdnd_selection;
  	Atom requested;
  
  	int xdnd_version;
  
  #if defined(OPENGL_ENABLED)
  	ContextGL_X11 *context_gl;
  #endif
  	//Rasterizer *rasterizer;
  	VisualServer *visual_server;
  	VideoMode current_videomode;
  	List<String> args;
  	Window x11_window;
  	Window xdnd_source_window;
  	MainLoop *main_loop;
  	::Display *x11_display;
  	char *xmbstring;
  	int xmblen;
  	unsigned long last_timestamp;
  	::Time last_keyrelease_time;
  	::XIC xic;
  	::XIM xim;
  	::XIMStyle xim_style;
  	static void xim_destroy_callback(::XIM im, ::XPointer client_data,
  			::XPointer call_data);
  
  	// IME
  	bool im_active;
  	Vector2 im_position;
  	Vector2 last_position_before_fs;
  
  	Size2 min_size;
  	Size2 max_size;
  
  	Point2 last_mouse_pos;
  	bool last_mouse_pos_valid;
  	Point2i last_click_pos;
  	uint64_t last_click_ms;
  	int last_click_button_index;
  	uint32_t last_button_state;
  
  	struct {
  		int opcode;
  		Vector<int> touch_devices;
  		Map<int, Vector2> absolute_devices;
  		Map<int, Vector2> pen_pressure_range;
  		Map<int, Vector2> pen_tilt_x_range;
  		Map<int, Vector2> pen_tilt_y_range;
  		XIEventMask all_event_mask;
  		XIEventMask all_master_event_mask;
  		Map<int, Vector2> state;
  		double pressure;
  		bool pressure_supported;
  		Vector2 tilt;
  		Vector2 mouse_pos_to_filter;
  		Vector2 relative_motion;
  		Vector2 raw_pos;
  		Vector2 old_raw_pos;
  		::Time last_relative_time;
  	} xi;
  
  	bool refresh_device_info();
  
  	unsigned int get_mouse_button_state(unsigned int p_x11_button, int p_x11_type);
  	void get_key_modifier_state(unsigned int p_x11_state, Ref<InputEventWithModifiers> state);
  	void flush_mouse_motion();
  
  	MouseMode mouse_mode;
  	Point2i center;
  
  	void _handle_key_event(XKeyEvent *p_event, LocalVector<XEvent> &p_events, uint32_t &p_event_index, bool p_echo = false);
  
  	Atom _process_selection_request_target(Atom p_target, Window p_requestor, Atom p_property, Atom p_selection) const;
  	void _handle_selection_request_event(XSelectionRequestEvent *p_event) const;
  
  	String _get_clipboard_impl(Atom p_source, Window x11_window, Atom target) const;
  	String _get_clipboard(Atom p_source, Window x11_window) const;
  	void _clipboard_transfer_ownership(Atom p_source, Window x11_window) const;
  
  	mutable Mutex events_mutex;
  	Thread events_thread;
  	bool events_thread_done = false;
  	LocalVector<XEvent> polled_events;
  	static void _poll_events_thread(void *ud);
  	bool _wait_for_events() const;
  	void _poll_events();
  	void _check_pending_events(LocalVector<XEvent> &r_events);
  
  	static Bool _predicate_all_events(Display *display, XEvent *event, XPointer arg);
  	static Bool _predicate_clipboard_selection(Display *display, XEvent *event, XPointer arg);
  	static Bool _predicate_clipboard_incr(Display *display, XEvent *event, XPointer arg);
  	static Bool _predicate_clipboard_save_targets(Display *display, XEvent *event, XPointer arg);
  
  	void process_xevents();
  	virtual void delete_main_loop();
  
  	bool force_quit;
  	bool minimized;
  	bool window_has_focus;
  	bool do_mouse_warp;
  
  	const char *cursor_theme;
  	int cursor_size;
  	XcursorImage *img[CURSOR_MAX];
  	Cursor cursors[CURSOR_MAX];
  	Cursor null_cursor;
  	CursorShape current_cursor;
  	Map<CursorShape, Vector<Variant>> cursors_cache;
  
  	InputDefault *input;
  
  #ifdef JOYDEV_ENABLED
  	JoypadLinux *joypad;
  #endif
  
  #ifdef ALSA_ENABLED
  	AudioDriverALSA driver_alsa;
  #endif
  
  #ifdef ALSAMIDI_ENABLED
  	MIDIDriverALSAMidi driver_alsamidi;
  #endif
  
  #ifdef PULSEAUDIO_ENABLED
  	AudioDriverPulseAudio driver_pulseaudio;
  #endif
  
  	PowerX11 *power_manager;
  
  	bool layered_window;
  
  	CrashHandler crash_handler;
  
  	int video_driver_index;
  	bool maximized;
  	bool window_focused;
  	//void set_wm_border(bool p_enabled);
  	void set_wm_fullscreen(bool p_enabled);
  	void set_wm_above(bool p_enabled);
  
  	typedef xrr_monitor_info *(*xrr_get_monitors_t)(Display *dpy, Window window, Bool get_active, int *nmonitors);
  	typedef void (*xrr_free_monitors_t)(xrr_monitor_info *monitors);
  	xrr_get_monitors_t xrr_get_monitors;
  	xrr_free_monitors_t xrr_free_monitors;
  	void *xrandr_handle;
  	Bool xrandr_ext_ok;
  
  protected:
  	virtual int get_current_video_driver() const;
  
  	virtual void initialize_core();
  	virtual Error initialize(const VideoMode &p_desired, int p_video_driver, int p_audio_driver);
  	virtual void finalize();
  
  	virtual bool is_offscreen_gl_available() const;
  	virtual void set_offscreen_gl_current(bool p_current);
  
  	virtual void set_main_loop(MainLoop *p_main_loop);
  
  	void _window_changed(XEvent *event);
  
  	bool window_maximize_check(const char *p_atom_name) const;
  	bool is_window_maximize_allowed() const;
  
  public:
  	virtual String get_name() const;
  
  	virtual void set_cursor_shape(CursorShape p_shape);
  	virtual CursorShape get_cursor_shape() const;
  	virtual void set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot);
  
  	void set_mouse_mode(MouseMode p_mode);
  	MouseMode get_mouse_mode() const;
  
  	virtual void warp_mouse_position(const Point2 &p_to);
  	virtual Point2 get_mouse_position() const;
  	virtual int get_mouse_button_state() const;
  	virtual void set_window_title(const String &p_title);
  	virtual void set_window_mouse_passthrough(const PoolVector2Array &p_region);
  
  	virtual void set_icon(const Ref<Image> &p_icon);
  
  	virtual MainLoop *get_main_loop() const;
  
  	virtual uint64_t get_embedded_pck_offset() const;
  
  	virtual bool can_draw() const;
  
  	virtual void set_clipboard(const String &p_text);
  	virtual String get_clipboard() const;
  	virtual void set_clipboard_primary(const String &p_text);
  	virtual String get_clipboard_primary() const;
  
  	virtual void release_rendering_thread();
  	virtual void make_rendering_thread();
  	virtual void swap_buffers();
  
  	virtual String get_config_path() const;
  	virtual String get_data_path() const;
  	virtual String get_cache_path() const;
  
  	virtual String get_system_dir(SystemDir p_dir, bool p_shared_storage = true) const;
  
  	virtual Error shell_open(String p_uri);
  
  	virtual void set_video_mode(const VideoMode &p_video_mode, int p_screen = 0);
  	virtual VideoMode get_video_mode(int p_screen = 0) const;
  	virtual void get_fullscreen_mode_list(List<VideoMode> *p_list, int p_screen = 0) const;
  
  	virtual int get_screen_count() const;
  	virtual int get_current_screen() const;
  	virtual void set_current_screen(int p_screen);
  	virtual Point2 get_screen_position(int p_screen = -1) const;
  	virtual Size2 get_screen_size(int p_screen = -1) const;
  	virtual int get_screen_dpi(int p_screen = -1) const;
  	virtual float get_screen_refresh_rate(int p_screen = -1) const;
  	virtual Point2 get_window_position() const;
  	virtual void set_window_position(const Point2 &p_position);
  	virtual Size2 get_window_size() const;
  	virtual Size2 get_real_window_size() const;
  	virtual Size2 get_max_window_size() const;
  	virtual Size2 get_min_window_size() const;
  	virtual void set_min_window_size(const Size2 p_size);
  	virtual void set_max_window_size(const Size2 p_size);
  	virtual void set_window_size(const Size2 p_size);
  	virtual void set_window_fullscreen(bool p_enabled);
  	virtual bool is_window_fullscreen() const;
  	virtual void set_window_resizable(bool p_enabled);
  	virtual bool is_window_resizable() const;
  	virtual void set_window_minimized(bool p_enabled);
  	virtual bool is_window_minimized() const;
  	virtual void set_window_maximized(bool p_enabled);
  	virtual bool is_window_maximized() const;
  	virtual void set_window_always_on_top(bool p_enabled);
  	virtual bool is_window_always_on_top() const;
  	virtual bool is_window_focused() const;
  	virtual void request_attention();
  	virtual void *get_native_handle(int p_handle_type);
  
  	virtual void set_borderless_window(bool p_borderless);
  	virtual bool get_borderless_window();
  
  	virtual bool get_window_per_pixel_transparency_enabled() const;
  	virtual void set_window_per_pixel_transparency_enabled(bool p_enabled);
  
  	virtual void set_ime_active(const bool p_active);
  	virtual void set_ime_position(const Point2 &p_pos);
  
  	virtual String get_unique_id() const;
  	virtual String get_processor_name() const;
  
  	virtual void move_window_to_foreground();
  	virtual void alert(const String &p_alert, const String &p_title = "ALERT!");
  
  	virtual bool is_joy_known(int p_device);
  	virtual String get_joy_guid(int p_device) const;
  
  	virtual void set_context(int p_context);
  
  	virtual void _set_use_vsync(bool p_enable);
  	//virtual bool is_vsync_enabled() const;
  
  	virtual OS::PowerState get_power_state();
  	virtual int get_power_seconds_left();
  	virtual int get_power_percent_left();
  
  	virtual bool _check_internal_feature_support(const String &p_feature);
  
  	virtual void force_process_input();
  	void run();
  
  	void disable_crash_handler();
  	bool is_disable_crash_handler() const;
  
  	virtual Error move_to_trash(const String &p_path);
  
  	virtual LatinKeyboardVariant get_latin_keyboard_variant() const;
  	virtual int keyboard_get_layout_count() const;
  	virtual int keyboard_get_current_layout() const;
  	virtual void keyboard_set_current_layout(int p_index);
  	virtual String keyboard_get_layout_language(int p_index) const;
  	virtual String keyboard_get_layout_name(int p_index) const;
  	virtual uint32_t keyboard_get_scancode_from_physical(uint32_t p_scancode) const;
  
  	void update_real_mouse_position();
  	OS_X11();
  };
  
  #endif
  