text: /*************************************************************************/
  /*  os_x11.cpp                                                           */
  /*************************************************************************/
  /*                       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.                */
  /*************************************************************************/
  
  #include "os_x11.h"
  #include "drivers/gles3/rasterizer_gles3.h"
  #include "errno.h"
  #include "key_mapping_x11.h"
  #include "print_string.h"
  #include "servers/visual/visual_server_raster.h"
  #include "servers/visual/visual_server_wrap_mt.h"
  
  #ifdef HAVE_MNTENT
  #include <mntent.h>
  #endif
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include "X11/Xutil.h"
  
  #include "X11/Xatom.h"
  #include "X11/extensions/Xinerama.h"
  // ICCCM
  #define WM_NormalState 1L // window normal state
  #define WM_IconicState 3L // window minimized
  // EWMH
  #define _NET_WM_STATE_REMOVE 0L // remove/unset property
  #define _NET_WM_STATE_ADD 1L // add/set property
  #define _NET_WM_STATE_TOGGLE 2L // toggle property
  
  #include "main/main.h"
  
  #include <dlfcn.h>
  #include <fcntl.h>
  #include <sys/stat.h>
  #include <sys/types.h>
  #include <unistd.h>
  
  //stupid linux.h
  #ifdef KEY_TAB
  #undef KEY_TAB
  #endif
  
  #include <X11/Xatom.h>
  
  #undef CursorShape
  
  #include <X11/XKBlib.h>
  
  int OS_X11::get_video_driver_count() const {
  	return 1;
  }
  
  const char *OS_X11::get_video_driver_name(int p_driver) const {
  	return "GLES3";
  }
  
  int OS_X11::get_audio_driver_count() const {
  	return AudioDriverManager::get_driver_count();
  }
  
  const char *OS_X11::get_audio_driver_name(int p_driver) const {
  
  	AudioDriver *driver = AudioDriverManager::get_driver(p_driver);
  	ERR_FAIL_COND_V(!driver, "");
  	return AudioDriverManager::get_driver(p_driver)->get_name();
  }
  
  void OS_X11::initialize_core() {
  
  	crash_handler.initialize();
  
  	OS_Unix::initialize_core();
  }
  
  Error OS_X11::initialize(const VideoMode &p_desired, int p_video_driver, int p_audio_driver) {
  
  	long im_event_mask = 0;
  	last_button_state = 0;
  
  	xmbstring = NULL;
  	x11_window = 0;
  	last_click_ms = 0;
  	args = OS::get_singleton()->get_cmdline_args();
  	current_videomode = p_desired;
  	main_loop = NULL;
  	last_timestamp = 0;
  	last_mouse_pos_valid = false;
  	last_keyrelease_time = 0;
  	xdnd_version = 0;
  
  	if (get_render_thread_mode() == RENDER_SEPARATE_THREAD) {
  		XInitThreads();
  	}
  
  	/** XLIB INITIALIZATION **/
  	x11_display = XOpenDisplay(NULL);
  
  	if (!x11_display) {
  		ERR_PRINT("X11 Display is not available");
  		return ERR_UNAVAILABLE;
  	}
  
  	char *modifiers = NULL;
  	Bool xkb_dar = False;
  	XAutoRepeatOn(x11_display);
  	xkb_dar = XkbSetDetectableAutoRepeat(x11_display, True, NULL);
  
  	// Try to support IME if detectable auto-repeat is supported
  	if (xkb_dar == True) {
  
  #ifdef X_HAVE_UTF8_STRING
  		// Xutf8LookupString will be used later instead of XmbLookupString before
  		// the multibyte sequences can be converted to unicode string.
  		modifiers = XSetLocaleModifiers("");
  #endif
  	}
  
  	if (modifiers == NULL) {
  		if (is_stdout_verbose()) {
  			WARN_PRINT("IME is disabled");
  		}
  		modifiers = XSetLocaleModifiers("@im=none");
  		WARN_PRINT("Error setting locale modifiers");
  	}
  
  	const char *err;
  	xrr_get_monitors = NULL;
  	xrr_free_monitors = NULL;
  	int xrandr_major = 0;
  	int xrandr_minor = 0;
  	int event_base, error_base;
  	xrandr_ext_ok = XRRQueryExtension(x11_display, &event_base, &error_base);
  	xrandr_handle = dlopen("libXrandr.so.2", RTLD_LAZY);
  	if (!xrandr_handle) {
  		err = dlerror();
  		fprintf(stderr, "could not load libXrandr.so.2, Error: %s\n", err);
  	} else {
  		XRRQueryVersion(x11_display, &xrandr_major, &xrandr_minor);
  		if (((xrandr_major << 8) | xrandr_minor) >= 0x0105) {
  			xrr_get_monitors = (xrr_get_monitors_t)dlsym(xrandr_handle, "XRRGetMonitors");
  			if (!xrr_get_monitors) {
  				err = dlerror();
  				fprintf(stderr, "could not find symbol XRRGetMonitors\nError: %s\n", err);
  			} else {
  				xrr_free_monitors = (xrr_free_monitors_t)dlsym(xrandr_handle, "XRRFreeMonitors");
  				if (!xrr_free_monitors) {
  					err = dlerror();
  					fprintf(stderr, "could not find XRRFreeMonitors\nError: %s\n", err);
  					xrr_get_monitors = NULL;
  				}
  			}
  		}
  	}
  
  #ifdef TOUCH_ENABLED
  	if (!XQueryExtension(x11_display, "XInputExtension", &touch.opcode, &event_base, &error_base)) {
  		fprintf(stderr, "XInput extension not available");
  	} else {
  		// 2.2 is the first release with multitouch
  		int xi_major = 2;
  		int xi_minor = 2;
  		if (XIQueryVersion(x11_display, &xi_major, &xi_minor) != Success) {
  			fprintf(stderr, "XInput 2.2 not available (server supports %d.%d)\n", xi_major, xi_minor);
  			touch.opcode = 0;
  		} else {
  			int dev_count;
  			XIDeviceInfo *info = XIQueryDevice(x11_display, XIAllDevices, &dev_count);
  
  			for (int i = 0; i < dev_count; i++) {
  				XIDeviceInfo *dev = &info[i];
  				if (!dev->enabled)
  					continue;
  				if (!(dev->use == XIMasterPointer || dev->use == XIFloatingSlave))
  					continue;
  
  				bool direct_touch = false;
  				for (int j = 0; j < dev->num_classes; j++) {
  					if (dev->classes[j]->type == XITouchClass && ((XITouchClassInfo *)dev->classes[j])->mode == XIDirectTouch) {
  						direct_touch = true;
  						break;
  					}
  				}
  				if (direct_touch) {
  					touch.devices.push_back(dev->deviceid);
  					fprintf(stderr, "Using touch device: %s\n", dev->name);
  				}
  			}
  
  			XIFreeDeviceInfo(info);
  
  			if (is_stdout_verbose() && !touch.devices.size()) {
  				fprintf(stderr, "No touch devices found\n");
  			}
  		}
  	}
  #endif
  
  	xim = XOpenIM(x11_display, NULL, NULL, NULL);
  
  	if (xim == NULL) {
  		WARN_PRINT("XOpenIM failed");
  		xim_style = 0L;
  	} else {
  		::XIMCallback im_destroy_callback;
  		im_destroy_callback.client_data = (::XPointer)(this);
  		im_destroy_callback.callback = (::XIMProc)(xim_destroy_callback);
  		if (XSetIMValues(xim, XNDestroyCallback, &im_destroy_callback,
  					NULL) != NULL) {
  			WARN_PRINT("Error setting XIM destroy callback");
  		}
  
  		::XIMStyles *xim_styles = NULL;
  		xim_style = 0L;
  		char *imvalret = XGetIMValues(xim, XNQueryInputStyle, &xim_styles, NULL);
  		if (imvalret != NULL || xim_styles == NULL) {
  			fprintf(stderr, "Input method doesn't support any styles\n");
  		}
  
  		if (xim_styles) {
  			xim_style = 0L;
  			for (int i = 0; i < xim_styles->count_styles; i++) {
  
  				if (xim_styles->supported_styles[i] ==
  						(XIMPreeditNothing | XIMStatusNothing)) {
  
  					xim_style = xim_styles->supported_styles[i];
  					break;
  				}
  			}
  
  			XFree(xim_styles);
  		}
  		XFree(imvalret);
  	}
  
  /*
  	char* windowid = getenv("GODOT_WINDOWID");
  	if (windowid) {
  
  		//freopen("/home/punto/stdout", "w", stdout);
  		//reopen("/home/punto/stderr", "w", stderr);
  		x11_window = atol(windowid);
  
  		XWindowAttributes xwa;
  		XGetWindowAttributes(x11_display,x11_window,&xwa);
  
  		current_videomode.width = xwa.width;
  		current_videomode.height = xwa.height;
  	};
  	*/
  
  // maybe contextgl wants to be in charge of creating the window
  //print_line("def videomode "+itos(current_videomode.width)+","+itos(current_videomode.height));
  #if defined(OPENGL_ENABLED)
  
  	context_gl = memnew(ContextGL_X11(x11_display, x11_window, current_videomode, true));
  	context_gl->initialize();
  
  	RasterizerGLES3::register_config();
  
  	RasterizerGLES3::make_current();
  
  	context_gl->set_use_vsync(current_videomode.use_vsync);
  
  #endif
  	visual_server = memnew(VisualServerRaster);
  
  	if (get_render_thread_mode() != RENDER_THREAD_UNSAFE) {
  
  		visual_server = memnew(VisualServerWrapMT(visual_server, get_render_thread_mode() == RENDER_SEPARATE_THREAD));
  	}
  	if (current_videomode.maximized) {
  		current_videomode.maximized = false;
  		set_window_maximized(true);
  		// borderless fullscreen window mode
  	} else if (current_videomode.fullscreen) {
  		current_videomode.fullscreen = false;
  		set_window_fullscreen(true);
  	} else if (current_videomode.borderless_window) {
  		Hints hints;
  		Atom property;
  		hints.flags = 2;
  		hints.decorations = 0;
  		property = XInternAtom(x11_display, "_MOTIF_WM_HINTS", True);
  		XChangeProperty(x11_display, x11_window, property, property, 32, PropModeReplace, (unsigned char *)&hints, 5);
  	}
  
  	// disable resizable window
  	if (!current_videomode.resizable) {
  		XSizeHints *xsh;
  		xsh = XAllocSizeHints();
  		xsh->flags = PMinSize | PMaxSize;
  		XWindowAttributes xwa;
  		if (current_videomode.fullscreen) {
  			XGetWindowAttributes(x11_display, DefaultRootWindow(x11_display), &xwa);
  		} else {
  			XGetWindowAttributes(x11_display, x11_window, &xwa);
  		}
  		xsh->min_width = xwa.width;
  		xsh->max_width = xwa.width;
  		xsh->min_height = xwa.height;
  		xsh->max_height = xwa.height;
  		XSetWMNormalHints(x11_display, x11_window, xsh);
  		XFree(xsh);
  	}
  
  	if (current_videomode.always_on_top) {
  		current_videomode.always_on_top = false;
  		set_window_always_on_top(true);
  	}
  
  	AudioDriverManager::initialize(p_audio_driver);
  
  	ERR_FAIL_COND_V(!visual_server, ERR_UNAVAILABLE);
  	ERR_FAIL_COND_V(x11_window == 0, ERR_UNAVAILABLE);
  
  	XSetWindowAttributes new_attr;
  
  	new_attr.event_mask = KeyPressMask | KeyReleaseMask | ButtonPressMask |
  						  ButtonReleaseMask | EnterWindowMask |
  						  LeaveWindowMask | PointerMotionMask |
  						  Button1MotionMask |
  						  Button2MotionMask | Button3MotionMask |
  						  Button4MotionMask | Button5MotionMask |
  						  ButtonMotionMask | KeymapStateMask |
  						  ExposureMask | VisibilityChangeMask |
  						  StructureNotifyMask |
  						  SubstructureNotifyMask | SubstructureRedirectMask |
  						  FocusChangeMask | PropertyChangeMask |
  						  ColormapChangeMask | OwnerGrabButtonMask |
  						  im_event_mask;
  
  	XChangeWindowAttributes(x11_display, x11_window, CWEventMask, &new_attr);
  
  #ifdef TOUCH_ENABLED
  	if (touch.devices.size()) {
  
  		// Must be alive after this block
  		static unsigned char mask_data[XIMaskLen(XI_LASTEVENT)] = {};
  
  		touch.event_mask.deviceid = XIAllDevices;
  		touch.event_mask.mask_len = sizeof(mask_data);
  		touch.event_mask.mask = mask_data;
  
  		XISetMask(touch.event_mask.mask, XI_TouchBegin);
  		XISetMask(touch.event_mask.mask, XI_TouchUpdate);
  		XISetMask(touch.event_mask.mask, XI_TouchEnd);
  		XISetMask(touch.event_mask.mask, XI_TouchOwnership);
  
  		XISelectEvents(x11_display, x11_window, &touch.event_mask, 1);
  
  		// Disabled by now since grabbing also blocks mouse events
  		// (they are received as extended events instead of standard events)
  		/*XIClearMask(touch.event_mask.mask, XI_TouchOwnership);
  
  		// Grab touch devices to avoid OS gesture interference
  		for (int i = 0; i < touch.devices.size(); ++i) {
  			XIGrabDevice(x11_display, touch.devices[i], x11_window, CurrentTime, None, XIGrabModeAsync, XIGrabModeAsync, False, &touch.event_mask);
  		}*/
  	}
  #endif
  
  	/* set the titlebar name */
  	XStoreName(x11_display, x11_window, "Godot");
  
  	wm_delete = XInternAtom(x11_display, "WM_DELETE_WINDOW", true);
  	XSetWMProtocols(x11_display, x11_window, &wm_delete, 1);
  
  	if (xim && xim_style) {
  
  		xic = XCreateIC(xim, XNInputStyle, xim_style, XNClientWindow, x11_window, XNFocusWindow, x11_window, (char *)NULL);
  		if (XGetICValues(xic, XNFilterEvents, &im_event_mask, NULL) != NULL) {
  			WARN_PRINT("XGetICValues couldn't obtain XNFilterEvents value");
  			XDestroyIC(xic);
  			xic = NULL;
  		}
  		if (xic) {
  			XSetICFocus(xic);
  		} else {
  			WARN_PRINT("XCreateIC couldn't create xic");
  		}
  	} else {
  
  		xic = NULL;
  		WARN_PRINT("XCreateIC couldn't create xic");
  	}
  
  	cursor_size = XcursorGetDefaultSize(x11_display);
  	cursor_theme = XcursorGetTheme(x11_display);
  
  	if (!cursor_theme) {
  		if (is_stdout_verbose()) {
  			print_line("XcursorGetTheme could not get cursor theme");
  		}
  		cursor_theme = "default";
  	}
  
  	for (int i = 0; i < CURSOR_MAX; i++) {
  
  		cursors[i] = None;
  		img[i] = NULL;
  	}
  
  	current_cursor = CURSOR_ARROW;
  
  	if (cursor_theme) {
  		//print_line("cursor theme: "+String(cursor_theme));
  		for (int i = 0; i < CURSOR_MAX; i++) {
  
  			static const char *cursor_file[] = {
  				"left_ptr",
  				"xterm",
  				"hand2",
  				"cross",
  				"watch",
  				"left_ptr_watch",
  				"fleur",
  				"hand1",
  				"X_cursor",
  				"sb_v_double_arrow",
  				"sb_h_double_arrow",
  				"size_bdiag",
  				"size_fdiag",
  				"hand1",
  				"sb_v_double_arrow",
  				"sb_h_double_arrow",
  				"question_arrow"
  			};
  
  			img[i] = XcursorLibraryLoadImage(cursor_file[i], cursor_theme, cursor_size);
  			if (img[i]) {
  				cursors[i] = XcursorImageLoadCursor(x11_display, img[i]);
  				//print_line("found cursor: "+String(cursor_file[i])+" id "+itos(cursors[i]));
  			} else {
  				if (OS::is_stdout_verbose())
  					print_line("failed cursor: " + String(cursor_file[i]));
  			}
  		}
  	}
  
  	{
  		Pixmap cursormask;
  		XGCValues xgc;
  		GC gc;
  		XColor col;
  		Cursor cursor;
  
  		cursormask = XCreatePixmap(x11_display, RootWindow(x11_display, DefaultScreen(x11_display)), 1, 1, 1);
  		xgc.function = GXclear;
  		gc = XCreateGC(x11_display, cursormask, GCFunction, &xgc);
  		XFillRectangle(x11_display, cursormask, gc, 0, 0, 1, 1);
  		col.pixel = 0;
  		col.red = 0;
  		col.flags = 4;
  		cursor = XCreatePixmapCursor(x11_display,
  				cursormask, cursormask,
  				&col, &col, 0, 0);
  		XFreePixmap(x11_display, cursormask);
  		XFreeGC(x11_display, gc);
  
  		if (cursor == None) {
  			ERR_PRINT("FAILED CREATING CURSOR");
  		}
  
  		null_cursor = cursor;
  	}
  	set_cursor_shape(CURSOR_BUSY);
  
  	//Set Xdnd (drag & drop) support
  	Atom XdndAware = XInternAtom(x11_display, "XdndAware", False);
  	Atom version = 5;
  	XChangeProperty(x11_display, x11_window, XdndAware, XA_ATOM, 32, PropModeReplace, (unsigned char *)&version, 1);
  
  	xdnd_enter = XInternAtom(x11_display, "XdndEnter", False);
  	xdnd_position = XInternAtom(x11_display, "XdndPosition", False);
  	xdnd_status = XInternAtom(x11_display, "XdndStatus", False);
  	xdnd_action_copy = XInternAtom(x11_display, "XdndActionCopy", False);
  	xdnd_drop = XInternAtom(x11_display, "XdndDrop", False);
  	xdnd_finished = XInternAtom(x11_display, "XdndFinished", False);
  	xdnd_selection = XInternAtom(x11_display, "XdndSelection", False);
  	requested = None;
  
  	visual_server->init();
  
  	input = memnew(InputDefault);
  
  	window_has_focus = true; // Set focus to true at init
  #ifdef JOYDEV_ENABLED
  	joypad = memnew(JoypadLinux(input));
  #endif
  	_ensure_user_data_dir();
  
  	power_manager = memnew(PowerX11);
  
  	XEvent xevent;
  	while (XPending(x11_display) > 0) {
  		XNextEvent(x11_display, &xevent);
  		if (xevent.type == ConfigureNotify) {
  			_window_changed(&xevent);
  		}
  	}
  
  	return OK;
  }
  
  void OS_X11::xim_destroy_callback(::XIM im, ::XPointer client_data,
  		::XPointer call_data) {
  
  	WARN_PRINT("Input method stopped");
  	OS_X11 *os = reinterpret_cast<OS_X11 *>(client_data);
  	os->xim = NULL;
  	os->xic = NULL;
  }
  
  void OS_X11::set_ime_position(const Point2 &p_pos) {
  
  	if (!xic)
  		return;
  
  	::XPoint spot;
  	spot.x = short(p_pos.x);
  	spot.y = short(p_pos.y);
  	XVaNestedList preedit_attr = XVaCreateNestedList(0, XNSpotLocation, &spot, NULL);
  	XSetICValues(xic, XNPreeditAttributes, preedit_attr, NULL);
  	XFree(preedit_attr);
  }
  
  String OS_X11::get_unique_id() const {
  
  	static String machine_id;
  	if (machine_id.empty()) {
  		if (FileAccess *f = FileAccess::open("/etc/machine-id", FileAccess::READ)) {
  			while (machine_id.empty() && !f->eof_reached()) {
  				machine_id = f->get_line().strip_edges();
  			}
  			f->close();
  			memdelete(f);
  		}
  	}
  	return machine_id;
  }
  
  void OS_X11::finalize() {
  
  	if (main_loop)
  		memdelete(main_loop);
  	main_loop = NULL;
  
  	/*
  	if (debugger_connection_console) {
  		memdelete(debugger_connection_console);
  	}
  	*/
  
  #ifdef JOYDEV_ENABLED
  	memdelete(joypad);
  #endif
  #ifdef TOUCH_ENABLED
  	touch.devices.clear();
  	touch.state.clear();
  #endif
  	memdelete(input);
  
  	visual_server->finish();
  	memdelete(visual_server);
  	//memdelete(rasterizer);
  
  	memdelete(power_manager);
  
  	if (xrandr_handle)
  		dlclose(xrandr_handle);
  
  	XUnmapWindow(x11_display, x11_window);
  	XDestroyWindow(x11_display, x11_window);
  
  #if defined(OPENGL_ENABLED)
  	memdelete(context_gl);
  #endif
  	for (int i = 0; i < CURSOR_MAX; i++) {
  		if (cursors[i] != None)
  			XFreeCursor(x11_display, cursors[i]);
  		if (img[i] != NULL)
  			XcursorImageDestroy(img[i]);
  	};
  
  	if (xic) {
  		XDestroyIC(xic);
  	}
  	if (xim) {
  		XCloseIM(xim);
  	}
  
  	XCloseDisplay(x11_display);
  	if (xmbstring)
  		memfree(xmbstring);
  
  	args.clear();
  }
  
  void OS_X11::set_mouse_mode(MouseMode p_mode) {
  
  	if (p_mode == mouse_mode)
  		return;
  
  	if (mouse_mode == MOUSE_MODE_CAPTURED || mouse_mode == MOUSE_MODE_CONFINED)
  		XUngrabPointer(x11_display, CurrentTime);
  
  	// The only modes that show a cursor are VISIBLE and CONFINED
  	bool showCursor = (p_mode == MOUSE_MODE_VISIBLE || p_mode == MOUSE_MODE_CONFINED);
  
  	if (showCursor) {
  		XUndefineCursor(x11_display, x11_window); // show cursor
  	} else {
  		XDefineCursor(x11_display, x11_window, null_cursor); // hide cursor
  	}
  
  	mouse_mode = p_mode;
  
  	if (mouse_mode == MOUSE_MODE_CAPTURED || mouse_mode == MOUSE_MODE_CONFINED) {
  
  		while (true) {
  			//flush pending motion events
  
  			if (XPending(x11_display) > 0) {
  				XEvent event;
  				XPeekEvent(x11_display, &event);
  				if (event.type == MotionNotify) {
  					XNextEvent(x11_display, &event);
  				} else {
  					break;
  				}
  			} else {
  				break;
  			}
  		}
  
  		if (XGrabPointer(
  					x11_display, x11_window, True,
  					ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
  					GrabModeAsync, GrabModeAsync, x11_window, None, CurrentTime) != GrabSuccess) {
  			ERR_PRINT("NO GRAB");
  		}
  
  		center.x = current_videomode.width / 2;
  		center.y = current_videomode.height / 2;
  		XWarpPointer(x11_display, None, x11_window,
  				0, 0, 0, 0, (int)center.x, (int)center.y);
  
  		input->set_mouse_position(center);
  	} else {
  		do_mouse_warp = false;
  	}
  
  	XFlush(x11_display);
  }
  
  void OS_X11::warp_mouse_position(const Point2 &p_to) {
  
  	if (mouse_mode == MOUSE_MODE_CAPTURED) {
  
  		last_mouse_pos = p_to;
  	} else {
  
  		/*XWindowAttributes xwa;
  		XGetWindowAttributes(x11_display, x11_window, &xwa);
  		printf("%d %d\n", xwa.x, xwa.y); needed? */
  
  		XWarpPointer(x11_display, None, x11_window,
  				0, 0, 0, 0, (int)p_to.x, (int)p_to.y);
  	}
  }
  
  OS::MouseMode OS_X11::get_mouse_mode() const {
  	return mouse_mode;
  }
  
  int OS_X11::get_mouse_button_state() const {
  	return last_button_state;
  }
  
  Point2 OS_X11::get_mouse_position() const {
  	return last_mouse_pos;
  }
  
  void OS_X11::set_window_title(const String &p_title) {
  	XStoreName(x11_display, x11_window, p_title.utf8().get_data());
  
  	Atom _net_wm_name = XInternAtom(x11_display, "_NET_WM_NAME", false);
  	Atom utf8_string = XInternAtom(x11_display, "UTF8_STRING", false);
  	XChangeProperty(x11_display, x11_window, _net_wm_name, utf8_string, 8, PropModeReplace, (unsigned char *)p_title.utf8().get_data(), p_title.utf8().length());
  }
  
  void OS_X11::set_video_mode(const VideoMode &p_video_mode, int p_screen) {
  }
  
  OS::VideoMode OS_X11::get_video_mode(int p_screen) const {
  	return current_videomode;
  }
  
  void OS_X11::get_fullscreen_mode_list(List<VideoMode> *p_list, int p_screen) const {
  }
  
  void OS_X11::set_wm_fullscreen(bool p_enabled) {
  	if (p_enabled && !is_window_resizable()) {
  		// Set the window as resizable to prevent window managers to ignore the fullscreen state flag.
  		XSizeHints *xsh;
  
  		xsh = XAllocSizeHints();
  		xsh->flags = 0L;
  		XSetWMNormalHints(x11_display, x11_window, xsh);
  		XFree(xsh);
  	}
  
  	// Using EWMH -- Extened Window Manager Hints
  	XEvent xev;
  	Atom wm_state = XInternAtom(x11_display, "_NET_WM_STATE", False);
  	Atom wm_fullscreen = XInternAtom(x11_display, "_NET_WM_STATE_FULLSCREEN", False);
  
  	memset(&xev, 0, sizeof(xev));
  	xev.type = ClientMessage;
  	xev.xclient.window = x11_window;
  	xev.xclient.message_type = wm_state;
  	xev.xclient.format = 32;
  	xev.xclient.data.l[0] = p_enabled ? _NET_WM_STATE_ADD : _NET_WM_STATE_REMOVE;
  	xev.xclient.data.l[1] = wm_fullscreen;
  	xev.xclient.data.l[2] = 0;
  
  	XSendEvent(x11_display, DefaultRootWindow(x11_display), False, SubstructureRedirectMask | SubstructureNotifyMask, &xev);
  
  	// set bypass compositor hint
  	Atom bypass_compositor = XInternAtom(x11_display, "_NET_WM_BYPASS_COMPOSITOR", False);
  	unsigned long compositing_disable_on = p_enabled ? 1 : 0;
  	XChangeProperty(x11_display, x11_window, bypass_compositor, XA_CARDINAL, 32, PropModeReplace, (unsigned char *)&compositing_disable_on, 1);
  
  	XFlush(x11_display);
  
  	if (!p_enabled && !is_window_resizable()) {
  		// Reset the non-resizable flags if we un-set these before.
  		Size2 size = get_window_size();
  		XSizeHints *xsh;
  
  		xsh = XAllocSizeHints();
  		xsh->flags = PMinSize | PMaxSize;
  		xsh->min_width = size.x;
  		xsh->max_width = size.x;
  		xsh->min_height = size.y;
  		xsh->max_height = size.y;
  
  		XSetWMNormalHints(x11_display, x11_window, xsh);
  		XFree(xsh);
  	}
  
  	if (!p_enabled && !get_borderless_window()) {
  		// put decorations back if the window wasn't suppoesed to be borderless
  		Hints hints;
  		Atom property;
  		hints.flags = 2;
  		hints.decorations = 1;
  		property = XInternAtom(x11_display, "_MOTIF_WM_HINTS", True);
  		XChangeProperty(x11_display, x11_window, property, property, 32, PropModeReplace, (unsigned char *)&hints, 5);
  	}
  }
  
  void OS_X11::set_wm_above(bool p_enabled) {
  	Atom wm_state = XInternAtom(x11_display, "_NET_WM_STATE", False);
  	Atom wm_above = XInternAtom(x11_display, "_NET_WM_STATE_ABOVE", False);
  
  	XClientMessageEvent xev;
  	memset(&xev, 0, sizeof(xev));
  	xev.type = ClientMessage;
  	xev.window = x11_window;
  	xev.message_type = wm_state;
  	xev.format = 32;
  	xev.data.l[0] = p_enabled ? _NET_WM_STATE_ADD : _NET_WM_STATE_REMOVE;
  	xev.data.l[1] = wm_above;
  	xev.data.l[3] = 1;
  	XSendEvent(x11_display, DefaultRootWindow(x11_display), False, SubstructureRedirectMask | SubstructureNotifyMask, (XEvent *)&xev);
  }
  
  int OS_X11::get_screen_count() const {
  	// Using Xinerama Extension
  	int event_base, error_base;
  	const Bool ext_okay = XineramaQueryExtension(x11_display, &event_base, &error_base);
  	if (!ext_okay) return 0;
  
  	int count;
  	XineramaScreenInfo *xsi = XineramaQueryScreens(x11_display, &count);
  	XFree(xsi);
  	return count;
  }
  
  int OS_X11::get_current_screen() const {
  	int x, y;
  	Window child;
  	XTranslateCoordinates(x11_display, x11_window, DefaultRootWindow(x11_display), 0, 0, &x, &y, &child);
  
  	int count = get_screen_count();
  	for (int i = 0; i < count; i++) {
  		Point2i pos = get_screen_position(i);
  		Size2i size = get_screen_size(i);
  		if ((x >= pos.x && x < pos.x + size.width) && (y >= pos.y && y < pos.y + size.height))
  			return i;
  	}
  	return 0;
  }
  
  void OS_X11::set_current_screen(int p_screen) {
  	int count = get_screen_count();
  	if (p_screen >= count) return;
  
  	if (current_videomode.fullscreen) {
  		Point2i position = get_screen_position(p_screen);
  		Size2i size = get_screen_size(p_screen);
  
  		XMoveResizeWindow(x11_display, x11_window, position.x, position.y, size.x, size.y);
  	} else {
  		if (p_screen != get_current_screen()) {
  			Point2i position = get_screen_position(p_screen);
  			XMoveWindow(x11_display, x11_window, position.x, position.y);
  		}
  	}
  }
  
  Point2 OS_X11::get_screen_position(int p_screen) const {
  	if (p_screen == -1) {
  		p_screen = get_current_screen();
  	}
  
  	// Using Xinerama Extension
  	int event_base, error_base;
  	const Bool ext_okay = XineramaQueryExtension(x11_display, &event_base, &error_base);
  	if (!ext_okay) {
  		return Point2i(0, 0);
  	}
  
  	int count;
  	XineramaScreenInfo *xsi = XineramaQueryScreens(x11_display, &count);
  	if (p_screen >= count) {
  		return Point2i(0, 0);
  	}
  
  	Point2i position = Point2i(xsi[p_screen].x_org, xsi[p_screen].y_org);
  
  	XFree(xsi);
  
  	return position;
  }
  
  Size2 OS_X11::get_screen_size(int p_screen) const {
  	if (p_screen == -1) {
  		p_screen = get_current_screen();
  	}
  
  	// Using Xinerama Extension
  	int event_base, error_base;
  	const Bool ext_okay = XineramaQueryExtension(x11_display, &event_base, &error_base);
  	if (!ext_okay) return Size2i(0, 0);
  
  	int count;
  	XineramaScreenInfo *xsi = XineramaQueryScreens(x11_display, &count);
  	if (p_screen >= count) return Size2i(0, 0);
  
  	Size2i size = Point2i(xsi[p_screen].width, xsi[p_screen].height);
  	XFree(xsi);
  	return size;
  }
  
  int OS_X11::get_screen_dpi(int p_screen) const {
  	if (p_screen == -1) {
  		p_screen = get_current_screen();
  	}
  
  	//invalid screen?
  	ERR_FAIL_INDEX_V(p_screen, get_screen_count(), 0);
  
  	//Get physical monitor Dimensions through XRandR and calculate dpi
  	Size2 sc = get_screen_size(p_screen);
  	if (xrandr_ext_ok) {
  		int count = 0;
  		if (xrr_get_monitors) {
  			xrr_monitor_info *monitors = xrr_get_monitors(x11_display, x11_window, true, &count);
  			if (p_screen < count) {
  				double xdpi = sc.width / (double)monitors[p_screen].mwidth * 25.4;
  				double ydpi = sc.height / (double)monitors[p_screen].mheight * 25.4;
  				xrr_free_monitors(monitors);
  				return (xdpi + ydpi) / 2;
  			}
  			xrr_free_monitors(monitors);
  		} else if (p_screen == 0) {
  			XRRScreenSize *sizes = XRRSizes(x11_display, 0, &count);
  			if (sizes) {
  				double xdpi = sc.width / (double)sizes[0].mwidth * 25.4;
  				double ydpi = sc.height / (double)sizes[0].mheight * 25.4;
  				return (xdpi + ydpi) / 2;
  			}
  		}
  	}
  
  	int width_mm = DisplayWidthMM(x11_display, p_screen);
  	int height_mm = DisplayHeightMM(x11_display, p_screen);
  	double xdpi = (width_mm ? sc.width / (double)width_mm * 25.4 : 0);
  	double ydpi = (height_mm ? sc.height / (double)height_mm * 25.4 : 0);
  	if (xdpi || xdpi)
  		return (xdpi + ydpi) / (xdpi && ydpi ? 2 : 1);
  
  	//could not get dpi
  	return 96;
  }
  
  Point2 OS_X11::get_window_position() const {
  	int x, y;
  	Window child;
  	XTranslateCoordinates(x11_display, x11_window, DefaultRootWindow(x11_display), 0, 0, &x, &y, &child);
  
  	int screen = get_current_screen();
  	Point2i screen_position = get_screen_position(screen);
  
  	return Point2i(x - screen_position.x, y - screen_position.y);
  }
  
  void OS_X11::set_window_position(const Point2 &p_position) {
  	XMoveWindow(x11_display, x11_window, p_position.x, p_position.y);
  }
  
  Size2 OS_X11::get_window_size() const {
  	// Use current_videomode width and height instead of XGetWindowAttributes
  	// since right after a XResizeWindow the attributes may not be updated yet
  	return Size2i(current_videomode.width, current_videomode.height);
  }
  
  Size2 OS_X11::get_real_window_size() const {
  	XWindowAttributes xwa;
  	XSync(x11_display, False);
  	XGetWindowAttributes(x11_display, x11_window, &xwa);
  	int w = xwa.width;
  	int h = xwa.height;
  	Atom prop = XInternAtom(x11_display, "_NET_FRAME_EXTENTS", True);
  	Atom type;
  	int format;
  	unsigned long len;
  	unsigned long remaining;
  	unsigned char *data = NULL;
  	if (XGetWindowProperty(x11_display, x11_window, prop, 0, 4, False, AnyPropertyType, &type, &format, &len, &remaining, &data) == Success) {
  		long *extents = (long *)data;
  		w += extents[0] + extents[1]; // left, right
  		h += extents[2] + extents[3]; // top, bottom
  	}
  	return Size2(w, h);
  }
  
  void OS_X11::set_window_size(const Size2 p_size) {
  	// If window resizable is disabled we need to update the attributes first
  	if (is_window_resizable() == false) {
  		XSizeHints *xsh;
  		xsh = XAllocSizeHints();
  		xsh->flags = PMinSize | PMaxSize;
  		xsh->min_width = p_size.x;
  		xsh->max_width = p_size.x;
  		xsh->min_height = p_size.y;
  		xsh->max_height = p_size.y;
  		XSetWMNormalHints(x11_display, x11_window, xsh);
  		XFree(xsh);
  	}
  
  	// Resize the window
  	XResizeWindow(x11_display, x11_window, p_size.x, p_size.y);
  
  	// Update our videomode width and height
  	current_videomode.width = p_size.x;
  	current_videomode.height = p_size.y;
  }
  
  void OS_X11::set_window_fullscreen(bool p_enabled) {
  	if (current_videomode.fullscreen == p_enabled)
  		return;
  
  	if (p_enabled && current_videomode.always_on_top) {
  		// Fullscreen + Always-on-top requires a maximized window on some window managers (Metacity)
  		set_window_maximized(true);
  	}
  	set_wm_fullscreen(p_enabled);
  	if (!p_enabled && !current_videomode.always_on_top) {
  		// Restore
  		set_window_maximized(false);
  	}
  
  	current_videomode.fullscreen = p_enabled;
  }
  
  bool OS_X11::is_window_fullscreen() const {
  	return current_videomode.fullscreen;
  }
  
  void OS_X11::set_window_resizable(bool p_enabled) {
  	XSizeHints *xsh;
  	Size2 size = get_window_size();
  
  	xsh = XAllocSizeHints();
  	xsh->flags = p_enabled ? 0L : PMinSize | PMaxSize;
  	if (!p_enabled) {
  		xsh->min_width = size.x;
  		xsh->max_width = size.x;
  		xsh->min_height = size.y;
  		xsh->max_height = size.y;
  	}
  	XSetWMNormalHints(x11_display, x11_window, xsh);
  	XFree(xsh);
  	current_videomode.resizable = p_enabled;
  }
  
  bool OS_X11::is_window_resizable() const {
  	return current_videomode.resizable;
  }
  
  void OS_X11::set_window_minimized(bool p_enabled) {
  	// Using ICCCM -- Inter-Client Communication Conventions Manual
  	XEvent xev;
  	Atom wm_change = XInternAtom(x11_display, "WM_CHANGE_STATE", False);
  
  	memset(&xev, 0, sizeof(xev));
  	xev.type = ClientMessage;
  	xev.xclient.window = x11_window;
  	xev.xclient.message_type = wm_change;
  	xev.xclient.format = 32;
  	xev.xclient.data.l[0] = p_enabled ? WM_IconicState : WM_NormalState;
  
  	XSendEvent(x11_display, DefaultRootWindow(x11_display), False, SubstructureRedirectMask | SubstructureNotifyMask, &xev);
  
  	Atom wm_state = XInternAtom(x11_display, "_NET_WM_STATE", False);
  	Atom wm_hidden = XInternAtom(x11_display, "_NET_WM_STATE_HIDDEN", False);
  
  	memset(&xev, 0, sizeof(xev));
  	xev.type = ClientMessage;
  	xev.xclient.window = x11_window;
  	xev.xclient.message_type = wm_state;
  	xev.xclient.format = 32;
  	xev.xclient.data.l[0] = _NET_WM_STATE_ADD;
  	xev.xclient.data.l[1] = wm_hidden;
  
  	XSendEvent(x11_display, DefaultRootWindow(x11_display), False, SubstructureRedirectMask | SubstructureNotifyMask, &xev);
  }
  
  bool OS_X11::is_window_minimized() const {
  	// Using ICCCM -- Inter-Client Communication Conventions Manual
  	Atom property = XInternAtom(x11_display, "WM_STATE", True);
  	Atom type;
  	int format;
  	unsigned long len;
  	unsigned long remaining;
  	unsigned char *data = NULL;
  
  	int result = XGetWindowProperty(
  			x11_display,
  			x11_window,
  			property,
  			0,
  			32,
  			False,
  			AnyPropertyType,
  			&type,
  			&format,
  			&len,
  			&remaining,
  			&data);
  
  	if (result == Success) {
  		long *state = (long *)data;
  		if (state[0] == WM_IconicState)
  			return true;
  	}
  	return false;
  }
  
  void OS_X11::set_window_maximized(bool p_enabled) {
  	if (is_window_maximized() == p_enabled)
  		return;
  
  	// Using EWMH -- Extended Window Manager Hints
  	XEvent xev;
  	Atom wm_state = XInternAtom(x11_display, "_NET_WM_STATE", False);
  	Atom wm_max_horz = XInternAtom(x11_display, "_NET_WM_STATE_MAXIMIZED_HORZ", False);
  	Atom wm_max_vert = XInternAtom(x11_display, "_NET_WM_STATE_MAXIMIZED_VERT", False);
  
  	memset(&xev, 0, sizeof(xev));
  	xev.type = ClientMessage;
  	xev.xclient.window = x11_window;
  	xev.xclient.message_type = wm_state;
  	xev.xclient.format = 32;
  	xev.xclient.data.l[0] = p_enabled ? _NET_WM_STATE_ADD : _NET_WM_STATE_REMOVE;
  	xev.xclient.data.l[1] = wm_max_horz;
  	xev.xclient.data.l[2] = wm_max_vert;
  
  	XSendEvent(x11_display, DefaultRootWindow(x11_display), False, SubstructureRedirectMask | SubstructureNotifyMask, &xev);
  
  	if (is_window_maximize_allowed()) {
  		while (p_enabled && !is_window_maximized()) {
  			// Wait for effective resizing (so the GLX context is too).
  		}
  	}
  
  	maximized = p_enabled;
  }
  
  bool OS_X11::is_window_maximize_allowed() {
  	Atom property = XInternAtom(x11_display, "_NET_WM_ALLOWED_ACTIONS", False);
  	Atom type;
  	int format;
  	unsigned long len;
  	unsigned long remaining;
  	unsigned char *data = NULL;
  
  	int result = XGetWindowProperty(
  			x11_display,
  			x11_window,
  			property,
  			0,
  			1024,
  			False,
  			XA_ATOM,
  			&type,
  			&format,
  			&len,
  			&remaining,
  			&data);
  
  	if (result == Success) {
  		Atom *atoms = (Atom *)data;
  		Atom wm_act_max_horz = XInternAtom(x11_display, "_NET_WM_ACTION_MAXIMIZE_HORZ", False);
  		Atom wm_act_max_vert = XInternAtom(x11_display, "_NET_WM_ACTION_MAXIMIZE_VERT", False);
  		bool found_wm_act_max_horz = false;
  		bool found_wm_act_max_vert = false;
  
  		for (unsigned int i = 0; i < len; i++) {
  			if (atoms[i] == wm_act_max_horz)
  				found_wm_act_max_horz = true;
  			if (atoms[i] == wm_act_max_vert)
  				found_wm_act_max_vert = true;
  
  			if (found_wm_act_max_horz || found_wm_act_max_vert)
  				return true;
  		}
  		XFree(atoms);
  	}
  
  	return false;
  }
  
  bool OS_X11::is_window_maximized() const {
  	// Using EWMH -- Extended Window Manager Hints
  	Atom property = XInternAtom(x11_display, "_NET_WM_STATE", False);
  	Atom type;
  	int format;
  	unsigned long len;
  	unsigned long remaining;
  	unsigned char *data = NULL;
  
  	int result = XGetWindowProperty(
  			x11_display,
  			x11_window,
  			property,
  			0,
  			1024,
  			False,
  			XA_ATOM,
  			&type,
  			&format,
  			&len,
  			&remaining,
  			&data);
  
  	if (result == Success) {
  		Atom *atoms = (Atom *)data;
  		Atom wm_max_horz = XInternAtom(x11_display, "_NET_WM_STATE_MAXIMIZED_HORZ", False);
  		Atom wm_max_vert = XInternAtom(x11_display, "_NET_WM_STATE_MAXIMIZED_VERT", False);
  		bool found_wm_max_horz = false;
  		bool found_wm_max_vert = false;
  
  		for (unsigned int i = 0; i < len; i++) {
  			if (atoms[i] == wm_max_horz)
  				found_wm_max_horz = true;
  			if (atoms[i] == wm_max_vert)
  				found_wm_max_vert = true;
  
  			if (found_wm_max_horz && found_wm_max_vert)
  				return true;
  		}
  		XFree(atoms);
  	}
  
  	return false;
  }
  
  void OS_X11::set_window_always_on_top(bool p_enabled) {
  	if (is_window_always_on_top() == p_enabled)
  		return;
  
  	if (p_enabled && current_videomode.fullscreen) {
  		// Fullscreen + Always-on-top requires a maximized window on some window managers (Metacity)
  		set_window_maximized(true);
  	}
  	set_wm_above(p_enabled);
  	if (!p_enabled && !current_videomode.fullscreen) {
  		// Restore
  		set_window_maximized(false);
  	}
  
  	current_videomode.always_on_top = p_enabled;
  }
  
  bool OS_X11::is_window_always_on_top() const {
  	return current_videomode.always_on_top;
  }
  
  void OS_X11::set_borderless_window(bool p_borderless) {
  
  	if (current_videomode.borderless_window == p_borderless)
  		return;
  
  	current_videomode.borderless_window = p_borderless;
  
  	Hints hints;
  	Atom property;
  	hints.flags = 2;
  	hints.decorations = current_videomode.borderless_window ? 0 : 1;
  	property = XInternAtom(x11_display, "_MOTIF_WM_HINTS", True);
  	XChangeProperty(x11_display, x11_window, property, property, 32, PropModeReplace, (unsigned char *)&hints, 5);
  }
  
  bool OS_X11::get_borderless_window() {
  	return current_videomode.borderless_window;
  }
  
  void OS_X11::request_attention() {
  	// Using EWMH -- Extended Window Manager Hints
  	//
  	// Sets the _NET_WM_STATE_DEMANDS_ATTENTION atom for WM_STATE
  	// Will be unset by the window manager after user react on the request for attention
  	//
  	XEvent xev;
  	Atom wm_state = XInternAtom(x11_display, "_NET_WM_STATE", False);
  	Atom wm_attention = XInternAtom(x11_display, "_NET_WM_STATE_DEMANDS_ATTENTION", False);
  
  	memset(&xev, 0, sizeof(xev));
  	xev.type = ClientMessage;
  	xev.xclient.window = x11_window;
  	xev.xclient.message_type = wm_state;
  	xev.xclient.format = 32;
  	xev.xclient.data.l[0] = _NET_WM_STATE_ADD;
  	xev.xclient.data.l[1] = wm_attention;
  
  	XSendEvent(x11_display, DefaultRootWindow(x11_display), False, SubstructureRedirectMask | SubstructureNotifyMask, &xev);
  }
  
  void OS_X11::get_key_modifier_state(unsigned int p_x11_state, Ref<InputEventWithModifiers> state) {
  
  	state->set_shift((p_x11_state & ShiftMask));
  	state->set_control((p_x11_state & ControlMask));
  	state->set_alt((p_x11_state & Mod1Mask /*|| p_x11_state&Mod5Mask*/)); //altgr should not count as alt
  	state->set_metakey((p_x11_state & Mod4Mask));
  }
  
  unsigned int OS_X11::get_mouse_button_state(unsigned int p_x11_state) {
  
  	unsigned int state = 0;
  
  	if (p_x11_state & Button1Mask) {
  
  		state |= 1 << 0;
  	}
  
  	if (p_x11_state & Button3Mask) {
  
  		state |= 1 << 1;
  	}
  
  	if (p_x11_state & Button2Mask) {
  
  		state |= 1 << 2;
  	}
  
  	if (p_x11_state & Button4Mask) {
  
  		state |= 1 << 3;
  	}
  
  	if (p_x11_state & Button5Mask) {
  
  		state |= 1 << 4;
  	}
  
  	last_button_state = state;
  	return state;
  }
  
  void OS_X11::handle_key_event(XKeyEvent *p_event, bool p_echo) {
  
  	// X11 functions don't know what const is
  	XKeyEvent *xkeyevent = p_event;
  
  	// This code was pretty difficult to write.
  	// The docs stink and every toolkit seems to
  	// do it in a different way.
  
  	/* Phase 1, obtain a proper keysym */
  
  	// This was also very difficult to figure out.
  	// You'd expect you could just use Keysym provided by
  	// XKeycodeToKeysym to obtain internationalized
  	// input.. WRONG!!
  	// you must use XLookupString (???) which not only wastes
  	// cycles generating an unnecessary string, but also
  	// still works in half the cases. (won't handle deadkeys)
  	// For more complex input methods (deadkeys and more advanced)
  	// you have to use XmbLookupString (??).
  	// So.. then you have to chosse which of both results
  	// you want to keep.
  	// This is a real bizarreness and cpu waster.
  
  	KeySym keysym_keycode = 0; // keysym used to find a keycode
  	KeySym keysym_unicode = 0; // keysym used to find unicode
  
  	// XLookupString returns keysyms usable as nice scancodes/
  	char str[256 + 1];
  	XLookupString(xkeyevent, str, 256, &keysym_keycode, NULL);
  
  	// Meanwhile, XLookupString returns keysyms useful for unicode.
  
  	if (!xmbstring) {
  		// keep a temporary buffer for the string
  		xmbstring = (char *)memalloc(sizeof(char) * 8);
  		xmblen = 8;
  	}
  
  	keysym_unicode = keysym_keycode;
  
  	if (xkeyevent->type == KeyPress && xic) {
  
  		Status status;
  #ifdef X_HAVE_UTF8_STRING
  		int utf8len = 8;
  		char *utf8string = (char *)memalloc(sizeof(char) * utf8len);
  		int utf8bytes = Xutf8LookupString(xic, xkeyevent, utf8string,
  				utf8len - 1, &keysym_unicode, &status);
  		if (status == XBufferOverflow) {
  			utf8len = utf8bytes + 1;
  			utf8string = (char *)memrealloc(utf8string, utf8len);
  			utf8bytes = Xutf8LookupString(xic, xkeyevent, utf8string,
  					utf8len - 1, &keysym_unicode, &status);
  		}
  		utf8string[utf8bytes] = '\0';
  
  		if (status == XLookupChars) {
  			bool keypress = xkeyevent->type == KeyPress;
  			unsigned int keycode = KeyMappingX11::get_keycode(keysym_keycode);
  			if (keycode >= 'a' && keycode <= 'z')
  				keycode -= 'a' - 'A';
  
  			String tmp;
  			tmp.parse_utf8(utf8string, utf8bytes);
  			for (int i = 0; i < tmp.length(); i++) {
  				Ref<InputEventKey> k;
  				k.instance();
  				if (keycode == 0 && tmp[i] == 0) {
  					continue;
  				}
  
  				get_key_modifier_state(xkeyevent->state, k);
  
  				k->set_unicode(tmp[i]);
  
  				k->set_pressed(keypress);
  
  				k->set_scancode(keycode);
  
  				k->set_echo(false);
  
  				if (k->get_scancode() == KEY_BACKTAB) {
  					//make it consistent across platforms.
  					k->set_scancode(KEY_TAB);
  					k->set_shift(true);
  				}
  
  				input->parse_input_event(k);
  			}
  			return;
  		}
  		memfree(utf8string);
  #else
  		do {
  
  			int mnbytes = XmbLookupString(xic, xkeyevent, xmbstring, xmblen - 1, &keysym_unicode, &status);
  			xmbstring[mnbytes] = '\0';
  
  			if (status == XBufferOverflow) {
  				xmblen = mnbytes + 1;
  				xmbstring = (char *)memrealloc(xmbstring, xmblen);
  			}
  		} while (status == XBufferOverflow);
  #endif
  	}
  
  	/* Phase 2, obtain a pigui keycode from the keysym */
  
  	// KeyMappingX11 just translated the X11 keysym to a PIGUI
  	// keysym, so it works in all platforms the same.
  
  	unsigned int keycode = KeyMappingX11::get_keycode(keysym_keycode);
  
  	/* Phase 3, obtain a unicode character from the keysym */
  
  	// KeyMappingX11 also translates keysym to unicode.
  	// It does a binary search on a table to translate
  	// most properly.
  	//print_line("keysym_unicode: "+rtos(keysym_unicode));
  	unsigned int unicode = keysym_unicode > 0 ? KeyMappingX11::get_unicode_from_keysym(keysym_unicode) : 0;
  
  	/* Phase 4, determine if event must be filtered */
  
  	// This seems to be a side-effect of using XIM.
  	// XEventFilter looks like a core X11 function,
  	// but it's actually just used to see if we must
  	// ignore a deadkey, or events XIM determines
  	// must not reach the actual gui.
  	// Guess it was a design problem of the extension
  
  	bool keypress = xkeyevent->type == KeyPress;
  
  	if (keycode == 0 && unicode == 0)
  		return;
  
  	/* Phase 5, determine modifier mask */
  
  	// No problems here, except I had no way to
  	// know Mod1 was ALT and Mod4 was META (applekey/winkey)
  	// just tried Mods until i found them.
  
  	//print_line("mod1: "+itos(xkeyevent->state&Mod1Mask)+" mod 5: "+itos(xkeyevent->state&Mod5Mask));
  
  	Ref<InputEventKey> k;
  	k.instance();
  
  	get_key_modifier_state(xkeyevent->state, k);
  
  	/* Phase 6, determine echo character */
  
  	// Echo characters in X11 are a keyrelease and a keypress
  	// one after the other with the (almot) same timestamp.
  	// To detect them, i use XPeekEvent and check that their
  	// difference in time is below a threshold.
  
  	if (xkeyevent->type != KeyPress) {
  
  		p_echo = false;
  
  		// make sure there are events pending,
  		// so this call won't block.
  		if (XPending(x11_display) > 0) {
  			XEvent peek_event;
  			XPeekEvent(x11_display, &peek_event);
  
  			// I'm using a threshold of 5 msecs,
  			// since sometimes there seems to be a little
  			// jitter. I'm still not convinced that all this approach
  			// is correct, but the xorg developers are
  			// not very helpful today.
  
  			::Time tresh = ABS(peek_event.xkey.time - xkeyevent->time);
  			if (peek_event.type == KeyPress && tresh < 5) {
  				KeySym rk;
  				XLookupString((XKeyEvent *)&peek_event, str, 256, &rk, NULL);
  				if (rk == keysym_keycode) {
  					XEvent event;
  					XNextEvent(x11_display, &event); //erase next event
  					handle_key_event((XKeyEvent *)&event, true);
  					return; //ignore current, echo next
  				}
  			}
  
  			// use the time from peek_event so it always works
  		}
  
  		// save the time to check for echo when keypress happens
  	}
  
  	/* Phase 7, send event to Window */
  
  	k->set_pressed(keypress);
  
  	if (keycode >= 'a' && keycode <= 'z')
  		keycode -= 'a' - 'A';
  
  	k->set_scancode(keycode);
  	k->set_unicode(unicode);
  	k->set_echo(p_echo);
  
  	if (k->get_scancode() == KEY_BACKTAB) {
  		//make it consistent across platforms.
  		k->set_scancode(KEY_TAB);
  		k->set_shift(true);
  	}
  
  	//don't set mod state if modifier keys are released by themselves
  	//else event.is_action() will not work correctly here
  	if (!k->is_pressed()) {
  		if (k->get_scancode() == KEY_SHIFT)
  			k->set_shift(false);
  		else if (k->get_scancode() == KEY_CONTROL)
  			k->set_control(false);
  		else if (k->get_scancode() == KEY_ALT)
  			k->set_alt(false);
  		else if (k->get_scancode() == KEY_META)
  			k->set_metakey(false);
  	}
  
  	bool last_is_pressed = Input::get_singleton()->is_key_pressed(k->get_scancode());
  	if (k->is_pressed()) {
  		if (last_is_pressed) {
  			k->set_echo(true);
  		}
  	} else {
  		//ignore
  		if (last_is_pressed == false) {
  			return;
  		}
  	}
  
  	//printf("key: %x\n",k->get_scancode());
  	input->parse_input_event(k);
  }
  
  struct Property {
  	unsigned char *data;
  	int format, nitems;
  	Atom type;
  };
  
  static Property read_property(Display *p_display, Window p_window, Atom p_property) {
  
  	Atom actual_type;
  	int actual_format;
  	unsigned long nitems;
  	unsigned long bytes_after;
  	unsigned char *ret = 0;
  
  	int read_bytes = 1024;
  
  	//Keep trying to read the property until there are no
  	//bytes unread.
  	do {
  		if (ret != 0)
  			XFree(ret);
  
  		XGetWindowProperty(p_display, p_window, p_property, 0, read_bytes, False, AnyPropertyType,
  				&actual_type, &actual_format, &nitems, &bytes_after,
  				&ret);
  
  		read_bytes *= 2;
  
  	} while (bytes_after != 0);
  
  	Property p = { ret, actual_format, (int)nitems, actual_type };
  
  	return p;
  }
  
  static Atom pick_target_from_list(Display *p_display, Atom *p_list, int p_count) {
  
  	static const char *target_type = "text/uri-list";
  
  	for (int i = 0; i < p_count; i++) {
  
  		Atom atom = p_list[i];
  
  		if (atom != None && String(XGetAtomName(p_display, atom)) == target_type)
  			return atom;
  	}
  	return None;
  }
  
  static Atom pick_target_from_atoms(Display *p_disp, Atom p_t1, Atom p_t2, Atom p_t3) {
  
  	static const char *target_type = "text/uri-list";
  	if (p_t1 != None && String(XGetAtomName(p_disp, p_t1)) == target_type)
  		return p_t1;
  
  	if (p_t2 != None && String(XGetAtomName(p_disp, p_t2)) == target_type)
  		return p_t2;
  
  	if (p_t3 != None && String(XGetAtomName(p_disp, p_t3)) == target_type)
  		return p_t3;
  
  	return None;
  }
  
  void OS_X11::_window_changed(XEvent *event) {
  
  	if (xic) {
  		//  Not portable.
  		set_ime_position(Point2(0, 1));
  	}
  	if ((event->xconfigure.width == current_videomode.width) &&
  			(event->xconfigure.height == current_videomode.height))
  		return;
  
  	current_videomode.width = event->xconfigure.width;
  	current_videomode.height = event->xconfigure.height;
  }
  
  void OS_X11::process_xevents() {
  
  	//printf("checking events %i\n", XPending(x11_display));
  
  	do_mouse_warp = false;
  
  	// Is the current mouse mode one where it needs to be grabbed.
  	bool mouse_mode_grab = mouse_mode == MOUSE_MODE_CAPTURED || mouse_mode == MOUSE_MODE_CONFINED;
  
  	while (XPending(x11_display) > 0) {
  		XEvent event;
  		XNextEvent(x11_display, &event);
  
  		if (XFilterEvent(&event, None)) {
  			continue;
  		}
  
  #ifdef TOUCH_ENABLED
  		if (XGetEventData(x11_display, &event.xcookie)) {
  
  			if (event.xcookie.type == GenericEvent && event.xcookie.extension == touch.opcode) {
  
  				XIDeviceEvent *event_data = (XIDeviceEvent *)event.xcookie.data;
  				int index = event_data->detail;
  				Vector2 pos = Vector2(event_data->event_x, event_data->event_y);
  
  				switch (event_data->evtype) {
  
  					case XI_TouchBegin: // Fall-through
  							// Disabled hand-in-hand with the grabbing
  							//XIAllowTouchEvents(x11_display, event_data->deviceid, event_data->detail, x11_window, XIAcceptTouch);
  
  					case XI_TouchEnd: {
  
  						bool is_begin = event_data->evtype == XI_TouchBegin;
  
  						Ref<InputEventScreenTouch> st;
  						st.instance();
  						st->set_index(index);
  						st->set_position(pos);
  						st->set_pressed(is_begin);
  
  						if (is_begin) {
  							if (touch.state.has(index)) // Defensive
  								break;
  							touch.state[index] = pos;
  							input->parse_input_event(st);
  						} else {
  							if (!touch.state.has(index)) // Defensive
  								break;
  							touch.state.erase(index);
  							input->parse_input_event(st);
  						}
  					} break;
  
  					case XI_TouchUpdate: {
  
  						Map<int, Vector2>::Element *curr_pos_elem = touch.state.find(index);
  						if (!curr_pos_elem) { // Defensive
  							break;
  						}
  
  						if (curr_pos_elem->value() != pos) {
  
  							Ref<InputEventScreenDrag> sd;
  							sd.instance();
  							sd->set_index(index);
  							sd->set_position(pos);
  							sd->set_relative(pos - curr_pos_elem->value());
  							input->parse_input_event(sd);
  
  							curr_pos_elem->value() = pos;
  						}
  					} break;
  				}
  			}
  		}
  		XFreeEventData(x11_display, &event.xcookie);
  #endif
  
  		switch (event.type) {
  			case Expose:
  				Main::force_redraw();
  				break;
  
  			case NoExpose:
  				minimized = true;
  				break;
  
  			case VisibilityNotify: {
  				XVisibilityEvent *visibility = (XVisibilityEvent *)&event;
  				minimized = (visibility->state == VisibilityFullyObscured);
  			} break;
  			case LeaveNotify: {
  				if (main_loop && !mouse_mode_grab)
  					main_loop->notification(MainLoop::NOTIFICATION_WM_MOUSE_EXIT);
  				if (input)
  					input->set_mouse_in_window(false);
  
  			} break;
  			case EnterNotify: {
  				if (main_loop && !mouse_mode_grab)
  					main_loop->notification(MainLoop::NOTIFICATION_WM_MOUSE_ENTER);
  				if (input)
  					input->set_mouse_in_window(true);
  			} break;
  			case FocusIn:
  				minimized = false;
  				window_has_focus = true;
  				main_loop->notification(MainLoop::NOTIFICATION_WM_FOCUS_IN);
  				if (mouse_mode_grab) {
  					// Show and update the cursor if confined and the window regained focus.
  					if (mouse_mode == MOUSE_MODE_CONFINED)
  						XUndefineCursor(x11_display, x11_window);
  					else if (mouse_mode == MOUSE_MODE_CAPTURED) // or re-hide it in captured mode
  						XDefineCursor(x11_display, x11_window, null_cursor);
  
  					XGrabPointer(
  							x11_display, x11_window, True,
  							ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
  							GrabModeAsync, GrabModeAsync, x11_window, None, CurrentTime);
  				}
  #ifdef TOUCH_ENABLED
  					// Grab touch devices to avoid OS gesture interference
  					/*for (int i = 0; i < touch.devices.size(); ++i) {
  					XIGrabDevice(x11_display, touch.devices[i], x11_window, CurrentTime, None, XIGrabModeAsync, XIGrabModeAsync, False, &touch.event_mask);
  				}*/
  #endif
  				if (xic) {
  					XSetICFocus(xic);
  				}
  				break;
  
  			case FocusOut:
  				window_has_focus = false;
  				main_loop->notification(MainLoop::NOTIFICATION_WM_FOCUS_OUT);
  				if (mouse_mode_grab) {
  					//dear X11, I try, I really try, but you never work, you do whathever you want.
  					if (mouse_mode == MOUSE_MODE_CAPTURED) {
  						// Show the cursor if we're in captured mode so it doesn't look weird.
  						XUndefineCursor(x11_display, x11_window);
  					}
  					XUngrabPointer(x11_display, CurrentTime);
  				}
  #ifdef TOUCH_ENABLED
  				// Ungrab touch devices so input works as usual while we are unfocused
  				/*for (int i = 0; i < touch.devices.size(); ++i) {
  					XIUngrabDevice(x11_display, touch.devices[i], CurrentTime);
  				}*/
  
  				// Release every pointer to avoid sticky points
  				for (Map<int, Vector2>::Element *E = touch.state.front(); E; E = E->next()) {
  
  					Ref<InputEventScreenTouch> st;
  					st.instance();
  					st->set_index(E->key());
  					st->set_position(E->get());
  					input->parse_input_event(st);
  				}
  				touch.state.clear();
  #endif
  				if (xic) {
  					XUnsetICFocus(xic);
  				}
  				break;
  
  			case ConfigureNotify:
  				_window_changed(&event);
  				break;
  			case ButtonPress:
  			case ButtonRelease: {
  
  				/* exit in case of a mouse button press */
  				last_timestamp = event.xbutton.time;
  				if (mouse_mode == MOUSE_MODE_CAPTURED) {
  					event.xbutton.x = last_mouse_pos.x;
  					event.xbutton.y = last_mouse_pos.y;
  				}
  
  				Ref<InputEventMouseButton> mb;
  				mb.instance();
  
  				get_key_modifier_state(event.xbutton.state, mb);
  				mb->set_button_mask(get_mouse_button_state(event.xbutton.state));
  				mb->set_position(Vector2(event.xbutton.x, event.xbutton.y));
  				mb->set_global_position(mb->get_position());
  				mb->set_button_index(event.xbutton.button);
  				if (mb->get_button_index() == 2)
  					mb->set_button_index(3);
  				else if (mb->get_button_index() == 3)
  					mb->set_button_index(2);
  
  				mb->set_pressed((event.type == ButtonPress));
  
  				if (event.type == ButtonPress && event.xbutton.button == 1) {
  
  					uint64_t diff = get_ticks_usec() / 1000 - last_click_ms;
  
  					if (diff < 400 && Point2(last_click_pos).distance_to(Point2(event.xbutton.x, event.xbutton.y)) < 5) {
  
  						last_click_ms = 0;
  						last_click_pos = Point2(-100, -100);
  						mb->set_doubleclick(true);
  
  					} else {
  						last_click_ms += diff;
  						last_click_pos = Point2(event.xbutton.x, event.xbutton.y);
  					}
  				}
  
  				input->parse_input_event(mb);
  
  			} break;
  			case MotionNotify: {
  
  				// FUCK YOU X11 API YOU SERIOUSLY GROSS ME OUT
  				// YOU ARE AS GROSS AS LOOKING AT A PUTRID PILE
  				// OF POOP STICKING OUT OF A CLOGGED TOILET
  				// HOW THE FUCK I AM SUPPOSED TO KNOW WHICH ONE
  				// OF THE MOTION NOTIFY EVENTS IS THE ONE GENERATED
  				// BY WARPING THE MOUSE POINTER?
  				// YOU ARE FORCING ME TO FILTER ONE BY ONE TO FIND IT
  				// PLEASE DO ME A FAVOR AND DIE DROWNED IN A FECAL
  				// MOUNTAIN BECAUSE THAT'S WHERE YOU BELONG.
  
  				while (true) {
  					if (mouse_mode == MOUSE_MODE_CAPTURED && event.xmotion.x == current_videomode.width / 2 && event.xmotion.y == current_videomode.height / 2) {
  						//this is likely the warp event since it was warped here
  						center = Vector2(event.xmotion.x, event.xmotion.y);
  						break;
  					}
  
  					if (XPending(x11_display) > 0) {
  						XEvent tevent;
  						XPeekEvent(x11_display, &tevent);
  						if (tevent.type == MotionNotify) {
  							XNextEvent(x11_display, &event);
  						} else {
  							break;
  						}
  					} else {
  						break;
  					}
  				}
  
  				last_timestamp = event.xmotion.time;
  
  				// Motion is also simple.
  				// A little hack is in order
  				// to be able to send relative motion events.
  				Point2i pos(event.xmotion.x, event.xmotion.y);
  
  				if (mouse_mode == MOUSE_MODE_CAPTURED) {
  
  					if (pos == Point2i(current_videomode.width / 2, current_videomode.height / 2)) {
  						//this sucks, it's a hack, etc and is a little inaccurate, etc.
  						//but nothing I can do, X11 sucks.
  
  						center = pos;
  						break;
  					}
  
  					Point2i new_center = pos;
  					pos = last_mouse_pos + (pos - center);
  					center = new_center;
  					do_mouse_warp = window_has_focus; // warp the cursor if we're focused in
  				}
  
  				if (!last_mouse_pos_valid) {
  
  					last_mouse_pos = pos;
  					last_mouse_pos_valid = true;
  				}
  
  				Point2i rel = pos - last_mouse_pos;
  
  				Ref<InputEventMouseMotion> mm;
  				mm.instance();
  
  				get_key_modifier_state(event.xmotion.state, mm);
  				mm->set_button_mask(get_mouse_button_state(event.xmotion.state));
  				mm->set_position(pos);
  				mm->set_global_position(pos);
  				input->set_mouse_position(pos);
  				mm->set_speed(input->get_last_mouse_speed());
  				mm->set_relative(rel);
  
  				last_mouse_pos = pos;
  
  				// printf("rel: %d,%d\n", rel.x, rel.y );
  				// Don't propagate the motion event unless we have focus
  				// this is so that the relative motion doesn't get messed up
  				// after we regain focus.
  				if (window_has_focus || !mouse_mode_grab)
  					input->parse_input_event(mm);
  
  			} break;
  			case KeyPress:
  			case KeyRelease: {
  
  				last_timestamp = event.xkey.time;
  
  				// key event is a little complex, so
  				// it will be handled in it's own function.
  				handle_key_event((XKeyEvent *)&event);
  			} break;
  			case SelectionRequest: {
  
  				XSelectionRequestEvent *req;
  				XEvent e, respond;
  				e = event;
  
  				req = &(e.xselectionrequest);
  				if (req->target == XInternAtom(x11_display, "UTF8_STRING", 0) ||
  						req->target == XInternAtom(x11_display, "COMPOUND_TEXT", 0) ||
  						req->target == XInternAtom(x11_display, "TEXT", 0) ||
  						req->target == XA_STRING ||
  						req->target == XInternAtom(x11_display, "text/plain;charset=utf-8", 0) ||
  						req->target == XInternAtom(x11_display, "text/plain", 0)) {
  					CharString clip = OS::get_clipboard().utf8();
  					XChangeProperty(x11_display,
  							req->requestor,
  							req->property,
  							req->target,
  							8,
  							PropModeReplace,
  							(unsigned char *)clip.get_data(),
  							clip.length());
  					respond.xselection.property = req->property;
  				} else if (req->target == XInternAtom(x11_display, "TARGETS", 0)) {
  
  					Atom data[7];
  					data[0] = XInternAtom(x11_display, "TARGETS", 0);
  					data[1] = XInternAtom(x11_display, "UTF8_STRING", 0);
  					data[2] = XInternAtom(x11_display, "COMPOUND_TEXT", 0);
  					data[3] = XInternAtom(x11_display, "TEXT", 0);
  					data[4] = XA_STRING;
  					data[5] = XInternAtom(x11_display, "text/plain;charset=utf-8", 0);
  					data[6] = XInternAtom(x11_display, "text/plain", 0);
  
  					XChangeProperty(x11_display,
  							req->requestor,
  							req->property,
  							XA_ATOM,
  							32,
  							PropModeReplace,
  							(unsigned char *)&data,
  							sizeof(data) / sizeof(data[0]));
  					respond.xselection.property = req->property;
  
  				} else {
  					char *targetname = XGetAtomName(x11_display, req->target);
  					printf("No Target '%s'\n", targetname);
  					if (targetname)
  						XFree(targetname);
  					respond.xselection.property = None;
  				}
  
  				respond.xselection.type = SelectionNotify;
  				respond.xselection.display = req->display;
  				respond.xselection.requestor = req->requestor;
  				respond.xselection.selection = req->selection;
  				respond.xselection.target = req->target;
  				respond.xselection.time = req->time;
  				XSendEvent(x11_display, req->requestor, True, NoEventMask, &respond);
  				XFlush(x11_display);
  			} break;
  
  			case SelectionNotify:
  
  				if (event.xselection.target == requested) {
  
  					Property p = read_property(x11_display, x11_window, XInternAtom(x11_display, "PRIMARY", 0));
  
  					Vector<String> files = String((char *)p.data).split("\n", false);
  					for (int i = 0; i < files.size(); i++) {
  						files[i] = files[i].replace("file://", "").replace("%20", " ").strip_escapes();
  					}
  					main_loop->drop_files(files);
  
  					//Reply that all is well.
  					XClientMessageEvent m;
  					memset(&m, 0, sizeof(m));
  					m.type = ClientMessage;
  					m.display = x11_display;
  					m.window = xdnd_source_window;
  					m.message_type = xdnd_finished;
  					m.format = 32;
  					m.data.l[0] = x11_window;
  					m.data.l[1] = 1;
  					m.data.l[2] = xdnd_action_copy; //We only ever copy.
  
  					XSendEvent(x11_display, xdnd_source_window, False, NoEventMask, (XEvent *)&m);
  				}
  				break;
  
  			case ClientMessage:
  
  				if ((unsigned int)event.xclient.data.l[0] == (unsigned int)wm_delete)
  					main_loop->notification(MainLoop::NOTIFICATION_WM_QUIT_REQUEST);
  
  				else if ((unsigned int)event.xclient.message_type == (unsigned int)xdnd_enter) {
  
  					//File(s) have been dragged over the window, check for supported target (text/uri-list)
  					xdnd_version = (event.xclient.data.l[1] >> 24);
  					Window source = event.xclient.data.l[0];
  					bool more_than_3 = event.xclient.data.l[1] & 1;
  					if (more_than_3) {
  						Property p = read_property(x11_display, source, XInternAtom(x11_display, "XdndTypeList", False));
  						requested = pick_target_from_list(x11_display, (Atom *)p.data, p.nitems);
  					} else
  						requested = pick_target_from_atoms(x11_display, event.xclient.data.l[2], event.xclient.data.l[3], event.xclient.data.l[4]);
  				} else if ((unsigned int)event.xclient.message_type == (unsigned int)xdnd_position) {
  
  					//xdnd position event, reply with an XDND status message
  					//just depending on type of data for now
  					XClientMessageEvent m;
  					memset(&m, 0, sizeof(m));
  					m.type = ClientMessage;
  					m.display = event.xclient.display;
  					m.window = event.xclient.data.l[0];
  					m.message_type = xdnd_status;
  					m.format = 32;
  					m.data.l[0] = x11_window;
  					m.data.l[1] = (requested != None);
  					m.data.l[2] = 0; //empty rectangle
  					m.data.l[3] = 0;
  					m.data.l[4] = xdnd_action_copy;
  
  					XSendEvent(x11_display, event.xclient.data.l[0], False, NoEventMask, (XEvent *)&m);
  					XFlush(x11_display);
  				} else if ((unsigned int)event.xclient.message_type == (unsigned int)xdnd_drop) {
  
  					if (requested != None) {
  						xdnd_source_window = event.xclient.data.l[0];
  						if (xdnd_version >= 1)
  							XConvertSelection(x11_display, xdnd_selection, requested, XInternAtom(x11_display, "PRIMARY", 0), x11_window, event.xclient.data.l[2]);
  						else
  							XConvertSelection(x11_display, xdnd_selection, requested, XInternAtom(x11_display, "PRIMARY", 0), x11_window, CurrentTime);
  					} else {
  						//Reply that we're not interested.
  						XClientMessageEvent m;
  						memset(&m, 0, sizeof(m));
  						m.type = ClientMessage;
  						m.display = event.xclient.display;
  						m.window = event.xclient.data.l[0];
  						m.message_type = xdnd_finished;
  						m.format = 32;
  						m.data.l[0] = x11_window;
  						m.data.l[1] = 0;
  						m.data.l[2] = None; //Failed.
  						XSendEvent(x11_display, event.xclient.data.l[0], False, NoEventMask, (XEvent *)&m);
  					}
  				}
  				break;
  			default:
  				break;
  		}
  	}
  
  	XFlush(x11_display);
  
  	if (do_mouse_warp) {
  
  		XWarpPointer(x11_display, None, x11_window,
  				0, 0, 0, 0, (int)current_videomode.width / 2, (int)current_videomode.height / 2);
  
  		/*
  		Window root, child;
  		int root_x, root_y;
  		int win_x, win_y;
  		unsigned int mask;
  		XQueryPointer( x11_display, x11_window, &root, &child, &root_x, &root_y, &win_x, &win_y, &mask );
  
  		printf("Root: %d,%d\n", root_x, root_y);
  		printf("Win: %d,%d\n", win_x, win_y);
  		*/
  	}
  }
  
  MainLoop *OS_X11::get_main_loop() const {
  
  	return main_loop;
  }
  
  void OS_X11::delete_main_loop() {
  
  	if (main_loop)
  		memdelete(main_loop);
  	main_loop = NULL;
  }
  
  void OS_X11::set_main_loop(MainLoop *p_main_loop) {
  
  	main_loop = p_main_loop;
  	input->set_main_loop(p_main_loop);
  }
  
  bool OS_X11::can_draw() const {
  
  	return !minimized;
  };
  
  void OS_X11::set_clipboard(const String &p_text) {
  
  	OS::set_clipboard(p_text);
  
  	XSetSelectionOwner(x11_display, XA_PRIMARY, x11_window, CurrentTime);
  	XSetSelectionOwner(x11_display, XInternAtom(x11_display, "CLIPBOARD", 0), x11_window, CurrentTime);
  };
  
  static String _get_clipboard_impl(Atom p_source, Window x11_window, ::Display *x11_display, String p_internal_clipboard, Atom target) {
  
  	String ret;
  
  	Atom type;
  	Atom selection = XA_PRIMARY;
  	int format, result;
  	unsigned long len, bytes_left, dummy;
  	unsigned char *data;
  	Window Sown = XGetSelectionOwner(x11_display, p_source);
  
  	if (Sown == x11_window) {
  
  		return p_internal_clipboard;
  	};
  
  	if (Sown != None) {
  		XConvertSelection(x11_display, p_source, target, selection,
  				x11_window, CurrentTime);
  		XFlush(x11_display);
  		while (true) {
  			XEvent event;
  			XNextEvent(x11_display, &event);
  			if (event.type == SelectionNotify && event.xselection.requestor == x11_window) {
  				break;
  			};
  		};
  
  		//
  		// Do not get any data, see how much data is there
  		//
  		XGetWindowProperty(x11_display, x11_window,
  				selection, // Tricky..
  				0, 0, // offset - len
  				0, // Delete 0==FALSE
  				AnyPropertyType, //flag
  				&type, // return type
  				&format, // return format
  				&len, &bytes_left, //that
  				&data);
  		// DATA is There
  		if (bytes_left > 0) {
  			result = XGetWindowProperty(x11_display, x11_window,
  					selection, 0, bytes_left, 0,
  					AnyPropertyType, &type, &format,
  					&len, &dummy, &data);
  			if (result == Success) {
  				ret.parse_utf8((const char *)data);
  			} else
  				printf("FAIL\n");
  			XFree(data);
  		}
  	}
  
  	return ret;
  }
  
  static String _get_clipboard(Atom p_source, Window x11_window, ::Display *x11_display, String p_internal_clipboard) {
  	String ret;
  	Atom utf8_atom = XInternAtom(x11_display, "UTF8_STRING", True);
  	if (utf8_atom != None) {
  		ret = _get_clipboard_impl(p_source, x11_window, x11_display, p_internal_clipboard, utf8_atom);
  	}
  	if (ret == "") {
  		ret = _get_clipboard_impl(p_source, x11_window, x11_display, p_internal_clipboard, XA_STRING);
  	}
  	return ret;
  }
  
  String OS_X11::get_clipboard() const {
  
  	String ret;
  	ret = _get_clipboard(XInternAtom(x11_display, "CLIPBOARD", 0), x11_window, x11_display, OS::get_clipboard());
  
  	if (ret == "") {
  		ret = _get_clipboard(XA_PRIMARY, x11_window, x11_display, OS::get_clipboard());
  	};
  
  	return ret;
  }
  
  String OS_X11::get_name() {
  
  	return "X11";
  }
  
  Error OS_X11::shell_open(String p_uri) {
  
  	Error ok;
  	List<String> args;
  	args.push_back(p_uri);
  	ok = execute("xdg-open", args, false);
  	if (ok == OK)
  		return OK;
  	ok = execute("gnome-open", args, false);
  	if (ok == OK)
  		return OK;
  	ok = execute("kde-open", args, false);
  	return ok;
  }
  
  bool OS_X11::_check_internal_feature_support(const String &p_feature) {
  
  	return p_feature == "pc" || p_feature == "s3tc";
  }
  
  String OS_X11::get_config_path() const {
  
  	if (has_environment("XDG_CONFIG_HOME")) {
  		return get_environment("XDG_CONFIG_HOME");
  	} else if (has_environment("HOME")) {
  		return get_environment("HOME").plus_file(".config");
  	} else {
  		return ".";
  	}
  }
  
  String OS_X11::get_data_path() const {
  
  	if (has_environment("XDG_DATA_HOME")) {
  		return get_environment("XDG_DATA_HOME");
  	} else if (has_environment("HOME")) {
  		return get_environment("HOME").plus_file(".local/share");
  	} else {
  		return get_config_path();
  	}
  }
  
  String OS_X11::get_cache_path() const {
  
  	if (has_environment("XDG_CACHE_HOME")) {
  		return get_environment("XDG_CACHE_HOME");
  	} else if (has_environment("HOME")) {
  		return get_environment("HOME").plus_file(".cache");
  	} else {
  		return get_config_path();
  	}
  }
  
  String OS_X11::get_system_dir(SystemDir p_dir) const {
  
  	String xdgparam;
  
  	switch (p_dir) {
  		case SYSTEM_DIR_DESKTOP: {
  
  			xdgparam = "DESKTOP";
  		} break;
  		case SYSTEM_DIR_DCIM: {
  
  			xdgparam = "PICTURES";
  
  		} break;
  		case SYSTEM_DIR_DOCUMENTS: {
  
  			xdgparam = "DOCUMENTS";
  
  		} break;
  		case SYSTEM_DIR_DOWNLOADS: {
  
  			xdgparam = "DOWNLOAD";
  
  		} break;
  		case SYSTEM_DIR_MOVIES: {
  
  			xdgparam = "VIDEOS";
  
  		} break;
  		case SYSTEM_DIR_MUSIC: {
  
  			xdgparam = "MUSIC";
  
  		} break;
  		case SYSTEM_DIR_PICTURES: {
  
  			xdgparam = "PICTURES";
  
  		} break;
  		case SYSTEM_DIR_RINGTONES: {
  
  			xdgparam = "MUSIC";
  
  		} break;
  	}
  
  	String pipe;
  	List<String> arg;
  	arg.push_back(xdgparam);
  	Error err = const_cast<OS_X11 *>(this)->execute("xdg-user-dir", arg, true, NULL, &pipe);
  	if (err != OK)
  		return ".";
  	return pipe.strip_edges();
  }
  
  void OS_X11::move_window_to_foreground() {
  
  	XRaiseWindow(x11_display, x11_window);
  }
  
  void OS_X11::set_cursor_shape(CursorShape p_shape) {
  
  	ERR_FAIL_INDEX(p_shape, CURSOR_MAX);
  
  	if (p_shape == current_cursor)
  		return;
  	if (mouse_mode == MOUSE_MODE_VISIBLE) {
  		if (cursors[p_shape] != None)
  			XDefineCursor(x11_display, x11_window, cursors[p_shape]);
  		else if (cursors[CURSOR_ARROW] != None)
  			XDefineCursor(x11_display, x11_window, cursors[CURSOR_ARROW]);
  	}
  
  	current_cursor = p_shape;
  }
  
  void OS_X11::set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot) {
  	if (p_cursor.is_valid()) {
  		Ref<Texture> texture = p_cursor;
  		Ref<Image> image = texture->get_data();
  
  		ERR_FAIL_COND(texture->get_width() != 32 || texture->get_height() != 32);
  
  		// Create the cursor structure
  		XcursorImage *cursor_image = XcursorImageCreate(texture->get_width(), texture->get_height());
  		XcursorUInt image_size = 32 * 32;
  		XcursorDim size = sizeof(XcursorPixel) * image_size;
  
  		cursor_image->version = 1;
  		cursor_image->size = size;
  		cursor_image->xhot = p_hotspot.x;
  		cursor_image->yhot = p_hotspot.y;
  
  		// allocate memory to contain the whole file
  		cursor_image->pixels = (XcursorPixel *)malloc(size);
  
  		image->lock();
  
  		for (XcursorPixel index = 0; index < image_size; index++) {
  			int column_index = floor(index / 32);
  			int row_index = index % 32;
  
  			*(cursor_image->pixels + index) = image->get_pixel(row_index, column_index).to_argb32();
  		}
  
  		image->unlock();
  
  		ERR_FAIL_COND(cursor_image->pixels == NULL);
  
  		// Save it for a further usage
  		cursors[p_shape] = XcursorImageLoadCursor(x11_display, cursor_image);
  
  		if (p_shape == CURSOR_ARROW) {
  			XDefineCursor(x11_display, x11_window, cursors[p_shape]);
  		}
  	}
  }
  
  void OS_X11::release_rendering_thread() {
  
  	context_gl->release_current();
  }
  
  void OS_X11::make_rendering_thread() {
  
  	context_gl->make_current();
  }
  
  void OS_X11::swap_buffers() {
  
  	context_gl->swap_buffers();
  }
  
  void OS_X11::alert(const String &p_alert, const String &p_title) {
  
  	List<String> args;
  	args.push_back("-center");
  	args.push_back("-title");
  	args.push_back(p_title);
  	args.push_back(p_alert);
  
  	execute("xmessage", args, true);
  }
  
  void OS_X11::set_icon(const Ref<Image> &p_icon) {
  	Atom net_wm_icon = XInternAtom(x11_display, "_NET_WM_ICON", False);
  
  	if (p_icon.is_valid()) {
  		Ref<Image> img = p_icon->duplicate();
  		img->convert(Image::FORMAT_RGBA8);
  
  		int w = img->get_width();
  		int h = img->get_height();
  
  		// We're using long to have wordsize (32Bit build -> 32 Bits, 64 Bit build -> 64 Bits
  		Vector<long> pd;
  
  		pd.resize(2 + w * h);
  
  		pd[0] = w;
  		pd[1] = h;
  
  		PoolVector<uint8_t>::Read r = img->get_data().read();
  
  		long *wr = &pd[2];
  		uint8_t const *pr = r.ptr();
  
  		for (int i = 0; i < w * h; i++) {
  			long v = 0;
  			//    A             R             G            B
  			v |= pr[3] << 24 | pr[0] << 16 | pr[1] << 8 | pr[2];
  			*wr++ = v;
  			pr += 4;
  		}
  		XChangeProperty(x11_display, x11_window, net_wm_icon, XA_CARDINAL, 32, PropModeReplace, (unsigned char *)pd.ptr(), pd.size());
  	} else {
  		XDeleteProperty(x11_display, x11_window, net_wm_icon);
  	}
  	XFlush(x11_display);
  }
  
  void OS_X11::force_process_input() {
  	process_xevents(); // get rid of pending events
  #ifdef JOYDEV_ENABLED
  	joypad->process_joypads();
  #endif
  }
  
  void OS_X11::run() {
  
  	force_quit = false;
  
  	if (!main_loop)
  		return;
  
  	main_loop->init();
  
  	//uint64_t last_ticks=get_ticks_usec();
  
  	//int frames=0;
  	//uint64_t frame=0;
  
  	while (!force_quit) {
  
  		process_xevents(); // get rid of pending events
  #ifdef JOYDEV_ENABLED
  		joypad->process_joypads();
  #endif
  		if (Main::iteration() == true)
  			break;
  	};
  
  	main_loop->finish();
  }
  
  bool OS_X11::is_joy_known(int p_device) {
  	return input->is_joy_mapped(p_device);
  }
  
  String OS_X11::get_joy_guid(int p_device) const {
  	return input->get_joy_guid_remapped(p_device);
  }
  
  void OS_X11::_set_use_vsync(bool p_enable) {
  	if (context_gl)
  		return context_gl->set_use_vsync(p_enable);
  }
  /*
  bool OS_X11::is_vsync_enabled() const {
  
  	if (context_gl)
  		return context_gl->is_using_vsync();
  
  	return true;
  }
  */
  void OS_X11::set_context(int p_context) {
  
  	XClassHint *classHint = XAllocClassHint();
  	if (classHint) {
  
  		if (p_context == CONTEXT_EDITOR)
  			classHint->res_name = (char *)"Godot_Editor";
  		if (p_context == CONTEXT_PROJECTMAN)
  			classHint->res_name = (char *)"Godot_ProjectList";
  		classHint->res_class = (char *)"Godot";
  		XSetClassHint(x11_display, x11_window, classHint);
  		XFree(classHint);
  	}
  }
  
  OS::PowerState OS_X11::get_power_state() {
  	return power_manager->get_power_state();
  }
  
  int OS_X11::get_power_seconds_left() {
  	return power_manager->get_power_seconds_left();
  }
  
  int OS_X11::get_power_percent_left() {
  	return power_manager->get_power_percent_left();
  }
  
  void OS_X11::disable_crash_handler() {
  	crash_handler.disable();
  }
  
  bool OS_X11::is_disable_crash_handler() const {
  	return crash_handler.is_disabled();
  }
  
  static String get_mountpoint(const String &p_path) {
  	struct stat s;
  	if (stat(p_path.utf8().get_data(), &s)) {
  		return "";
  	}
  
  #ifdef HAVE_MNTENT
  	dev_t dev = s.st_dev;
  	FILE *fd = setmntent("/proc/mounts", "r");
  	if (!fd) {
  		return "";
  	}
  
  	struct mntent mnt;
  	char buf[1024];
  	size_t buflen = 1024;
  	while (getmntent_r(fd, &mnt, buf, buflen)) {
  		if (!stat(mnt.mnt_dir, &s) && s.st_dev == dev) {
  			endmntent(fd);
  			return String(mnt.mnt_dir);
  		}
  	}
  
  	endmntent(fd);
  #endif
  	return "";
  }
  
  Error OS_X11::move_to_trash(const String &p_path) {
  	String trashcan = "";
  	String mnt = get_mountpoint(p_path);
  
  	if (mnt != "") {
  		String path(mnt + "/.Trash-" + itos(getuid()) + "/files");
  		struct stat s;
  		if (!stat(path.utf8().get_data(), &s)) {
  			trashcan = path;
  		}
  	}
  
  	if (trashcan == "") {
  		char *dhome = getenv("XDG_DATA_HOME");
  		if (dhome) {
  			trashcan = String(dhome) + "/Trash/files";
  		}
  	}
  
  	if (trashcan == "") {
  		char *home = getenv("HOME");
  		if (home) {
  			trashcan = String(home) + "/.local/share/Trash/files";
  		}
  	}
  
  	if (trashcan == "") {
  		ERR_PRINTS("move_to_trash: Could not determine trashcan location");
  		return FAILED;
  	}
  
  	List<String> args;
  	args.push_back("-p");
  	args.push_back(trashcan);
  	Error err = execute("mkdir", args, true);
  	if (err == OK) {
  		List<String> args2;
  		args2.push_back(p_path);
  		args2.push_back(trashcan);
  		err = execute("mv", args2, true);
  	}
  
  	return err;
  }
  
  OS::LatinKeyboardVariant OS_X11::get_latin_keyboard_variant() const {
  
  	XkbDescRec *xkbdesc = XkbAllocKeyboard();
  	ERR_FAIL_COND_V(!xkbdesc, LATIN_KEYBOARD_QWERTY);
  
  	XkbGetNames(x11_display, XkbSymbolsNameMask, xkbdesc);
  	ERR_FAIL_COND_V(!xkbdesc->names, LATIN_KEYBOARD_QWERTY);
  	ERR_FAIL_COND_V(!xkbdesc->names->symbols, LATIN_KEYBOARD_QWERTY);
  
  	char *layout = XGetAtomName(x11_display, xkbdesc->names->symbols);
  	ERR_FAIL_COND_V(!layout, LATIN_KEYBOARD_QWERTY);
  
  	Vector<String> info = String(layout).split("+");
  	ERR_FAIL_INDEX_V(1, info.size(), LATIN_KEYBOARD_QWERTY);
  
  	if (info[1].find("colemak") != -1) {
  		return LATIN_KEYBOARD_COLEMAK;
  	} else if (info[1].find("qwertz") != -1) {
  		return LATIN_KEYBOARD_QWERTZ;
  	} else if (info[1].find("azerty") != -1) {
  		return LATIN_KEYBOARD_AZERTY;
  	} else if (info[1].find("qzerty") != -1) {
  		return LATIN_KEYBOARD_QZERTY;
  	} else if (info[1].find("dvorak") != -1) {
  		return LATIN_KEYBOARD_DVORAK;
  	} else if (info[1].find("neo") != -1) {
  		return LATIN_KEYBOARD_NEO;
  	}
  
  	return LATIN_KEYBOARD_QWERTY;
  }
  
  OS_X11::OS_X11() {
  
  #ifdef PULSEAUDIO_ENABLED
  	AudioDriverManager::add_driver(&driver_pulseaudio);
  #endif
  
  #ifdef ALSA_ENABLED
  	AudioDriverManager::add_driver(&driver_alsa);
  #endif
  
  	minimized = false;
  	xim_style = 0L;
  	mouse_mode = MOUSE_MODE_VISIBLE;
  }
  