mdebase/milkwm/xserver.c

#define _MILSKO
#define USE_X11
#include "milkwm.h"

#include <stb_ds.h>
#include <stb_image.h>

typedef struct mwm_hints {
	unsigned long flags;
	unsigned long functions;
	unsigned long decorations;
	long	      input_mode;
	unsigned long status;
} mwm_hints_t;
enum mwm_hints_enum {
	MWM_HINTS_FUNCTIONS   = (1L << 0),
	MWM_HINTS_DECORATIONS = (1L << 1),

	MWM_FUNC_ALL	  = (1L << 0),
	MWM_FUNC_RESIZE	  = (1L << 1),
	MWM_FUNC_MOVE	  = (1L << 2),
	MWM_FUNC_MINIMIZE = (1L << 3),
	MWM_FUNC_MAXIMIZE = (1L << 4),
	MWM_FUNC_CLOSE	  = (1L << 5),

	MWM_DECOR_ALL	   = (1L << 0),
	MWM_DECOR_BORDER   = (1L << 1),
	MWM_DECOR_RESIZEH  = (1L << 2),
	MWM_DECOR_TITLE	   = (1L << 3),
	MWM_DECOR_MENU	   = (1L << 4),
	MWM_DECOR_MINIMIZE = (1L << 5),
	MWM_DECOR_MAXIMIZE = (1L << 6)
};

Display*	xdisplay;
pthread_t	xthread;
pthread_mutex_t xmutex;

static pthread_mutex_t focusmutex;

static Atom milkwm_set_focus;

static int red_max   = 0, red_shift;
static int green_max = 0, green_shift;
static int blue_max  = 0, blue_shift;

typedef struct window {
	MwWidget frame;
	Window	 client;
	int	 working;
} window_t;
static window_t* windows = NULL;
static Window*	 wnd	 = NULL;

static void* old_handler;
static int   error_happened = 0;
static int   ignore_error(Display* disp, XErrorEvent* ev) {
	  error_happened = 1;
	  return 0;
}

static void begin_error(void) {
	old_handler    = XSetErrorHandler(ignore_error);
	error_happened = 0;
}

static void end_error(void) {
	XSync(xdisplay, False);
	XSetErrorHandler(old_handler);
}

static void* x11_thread_routine(void* arg) {
	while(1) {
		pthread_mutex_lock(&xmutex);
		if(root != NULL) {
			pthread_mutex_unlock(&xmutex);
			break;
		}
		pthread_mutex_unlock(&xmutex);
	}

	loop_x();
	XCloseDisplay(xdisplay);
	return NULL;
}

static Window focus = None, nofocus;

static void set_focus(Window w) {
	int i;
	for(i = 0; i < arrlen(windows); i++) {
		pthread_mutex_lock(&focusmutex);
		if(windows[i].frame != NULL && windows[i].client == w) {
			pthread_mutex_unlock(&focusmutex);
			wm_focus(windows[i].frame, 1);
		} else if(windows[i].frame != NULL && focus != w && focus == windows[i].client) {
			pthread_mutex_unlock(&focusmutex);
			wm_focus(windows[i].frame, 0);
		} else {
			pthread_mutex_unlock(&focusmutex);
		}
	}

	pthread_mutex_lock(&focusmutex);
	focus = w;
	if(w == None) {
		XSetInputFocus(xdisplay, nofocus, RevertToParent, CurrentTime);
	} else {
		XSetInputFocus(xdisplay, w, RevertToParent, CurrentTime);
	}
	pthread_mutex_unlock(&focusmutex);
}

static unsigned long generate_color(int r, int g, int b) {
	if(red_max == 0) {
		XColor xc;

		xc.red	 = (int)r * 256;
		xc.green = (int)g * 256;
		xc.blue	 = (int)b * 256;

		XAllocColor(xdisplay, DefaultColormap(xdisplay, DefaultScreen(xdisplay)), &xc);

		return xc.pixel;
	} else {
		unsigned long px;

		px |= (r * red_max / 255) << red_shift;
		px |= (g * green_max / 255) << green_shift;
		px |= (b * blue_max / 255) << blue_shift;

		return px;
	}
}

static Pixmap render_image(Window wnd, const char* path, int tile, int fit) {
	Pixmap		  px;
	XWindowAttributes xwa;
	GC		  gc;
	int		  w, h;
	unsigned int	  ch;
	XImage*		  xi;
	int		  y, x;
	int		  pw, ph;
	int		  width, height;
	unsigned char*	  d = stbi_load(path, &w, &h, &ch, 3);
	if(d == NULL) return None;

	XGetWindowAttributes(xdisplay, wnd, &xwa);

	if(tile) {
		width  = w;
		height = h;
		tile   = 1;
	} else {
		double sx = (double)w / xwa.width;
		double sy = (double)h / xwa.height;

		if(fit ? (sx > sy) : (sx < sy)) {
			width  = w / sx;
			height = h / sx;
		} else {
			width  = w / sy;
			height = h / sy;
		}
	}

	px = XCreatePixmap(xdisplay, wnd, (pw = tile ? width : xwa.width), (ph = tile ? height : xwa.height), xwa.depth);
	gc = XCreateGC(xdisplay, px, 0, NULL);

	xi	 = XCreateImage(xdisplay, DefaultVisual(xdisplay, DefaultScreen(xdisplay)), xwa.depth, ZPixmap, 0, NULL, width, height, 32, 0);
	xi->data = malloc(xi->bytes_per_line * height);
	memset(xi->data, 0, xi->bytes_per_line * height);

	for(y = 0; y < height; y++) {
		for(x = 0; x < width; x++) {
			unsigned long  px;
			int	       ix, iy;
			int	       ax, ay;
			unsigned char* rgb;

			ix = x * w / width;
			iy = y * h / height;

			rgb = &d[(iy * w + ix) * 3];

			px = generate_color(rgb[0], rgb[1], rgb[2]);

			XPutPixel(xi, x, y, px);
		}
	}
	XPutImage(xdisplay, px, gc, xi, 0, 0, (pw - width) / 2, (ph - height) / 2, width, height);

	XDestroyImage(xi);

	XFreeGC(xdisplay, gc);

	free(d);

	return px;
}

/* this can be optimized by backends p much, so we do this in backend... */
void set_background_x(void) {
	const char* str	 = NULL;
	const char* type = NULL;
	xl_node_t*  n;

	if(wm_config == NULL || wm_config->root == NULL) {
		n = NULL;
	} else {
		n = wm_config->root->first_child;
	}
	while(n != NULL) {
		if(n->type == XL_NODE_NODE && strcmp(n->name, "Wallpaper") == 0) {
			xl_attribute_t* a = n->first_attribute;
			while(a != NULL) {
				if(strcmp(a->key, "Type") == 0) type = a->value;
				a = a->next;
			}

			str = n->text;
		}
		n = n->next;
	}

	if(type != NULL && strcmp(type, "Solid") == 0 && str != NULL) {
		MwRGB  rgb;
		XColor xc;

		MwParseColorNoAllocate(str, &rgb);

		xc.red	 = rgb.red * 256;
		xc.green = rgb.green * 256;
		xc.blue	 = rgb.blue * 256;

		XAllocColor(xdisplay, DefaultColormap(xdisplay, DefaultScreen(xdisplay)), &xc);

		XSetWindowBackground(xdisplay, DefaultRootWindow(xdisplay), xc.pixel);
	} else if(type != NULL && (strcmp(type, "Tile") == 0 || strcmp(type, "Fill") == 0 || strcmp(type, "Fit") == 0) && str != NULL) {
		XWindowAttributes xwa;
		Pixmap		  px;

		XGetWindowAttributes(xdisplay, DefaultRootWindow(xdisplay), &xwa);

		if((px = render_image(DefaultRootWindow(xdisplay), str, strcmp(type, "Tile") == 0 ? 1 : 0, strcmp(type, "Fit") == 0 ? 1 : 0)) != None) {
			XSetWindowBackgroundPixmap(xdisplay, DefaultRootWindow(xdisplay), px);
			XFreePixmap(xdisplay, px);
		}
	}
	XClearWindow(xdisplay, DefaultRootWindow(xdisplay));
	XFlush(xdisplay);
}

int init_x(void) {
	void*		     old;
	XSetWindowAttributes xswa;
	Cursor		     cur;
	XVisualInfo	     xvi;
	XVisualInfo*	     pxvi;
	int		     n, i;

	xswa.override_redirect = True;

	xdisplay = XOpenDisplay(NULL);

	begin_error();
	XSelectInput(xdisplay, DefaultRootWindow(xdisplay), SubstructureRedirectMask | SubstructureNotifyMask);
	end_error();

	if(error_happened) return 1;

	nofocus = XCreateSimpleWindow(xdisplay, DefaultRootWindow(xdisplay), -10, -10, 1, 1, 0, 0, 0);
	XChangeWindowAttributes(xdisplay, nofocus, CWOverrideRedirect, &xswa);
	XMapWindow(xdisplay, nofocus);
	set_focus(None);

	XChangeProperty(xdisplay, DefaultRootWindow(xdisplay), XInternAtom(xdisplay, "_NET_SUPPORTING_WM_CHECK", False), XA_WINDOW, 32, PropModeReplace, (unsigned char*)&nofocus, 1);
	XChangeProperty(xdisplay, nofocus, XInternAtom(xdisplay, "_NET_SUPPORTING_WM_CHECK", False), XA_WINDOW, 32, PropModeReplace, (unsigned char*)&nofocus, 1);
	XChangeProperty(xdisplay, nofocus, XInternAtom(xdisplay, "_NET_WM_NAME", False), XInternAtom(xdisplay, "UTF8_STRING", False), 8, PropModeReplace, (unsigned char*)"milkwm", 6);

	cur = MwLLX11CreateCursor(xdisplay, &MwCursorDefault, &MwCursorDefaultMask);
	XDefineCursor(xdisplay, DefaultRootWindow(xdisplay), cur);
	XFreeCursor(xdisplay, cur);

	milkwm_set_focus = XInternAtom(xdisplay, "MILKWM_SET_FOCUS", False);

	xvi.visualid = XVisualIDFromVisual(DefaultVisual(xdisplay, DefaultScreen(xdisplay)));

	pxvi = XGetVisualInfo(xdisplay, VisualIDMask, &xvi, &n);

	i = 0;
	while(!((n << i) & pxvi->red_mask)) i++;
	red_max	  = pxvi->red_mask >> i;
	red_shift = i;

	i = 0;
	while(!((n << i) & pxvi->green_mask)) i++;
	green_max   = pxvi->green_mask >> i;
	green_shift = i;

	i = 0;
	while(!((n << i) & pxvi->blue_mask)) i++;
	blue_max   = pxvi->blue_mask >> i;
	blue_shift = i;

	set_background_x();

	pthread_mutex_init(&xmutex, NULL);
	pthread_mutex_init(&focusmutex, NULL);

	pthread_create(&xthread, NULL, x11_thread_routine, NULL);

	return 0;
}

static void save(Window w) {
	XGrabButton(xdisplay, 1, 0, w, True, ButtonPressMask | ButtonReleaseMask | PointerMotionMask, GrabModeSync, GrabModeAsync, None, None);
	XSelectInput(xdisplay, w, StructureNotifyMask | FocusChangeMask | PropertyChangeMask);
	XSetWindowBorderWidth(xdisplay, w, 0);
	XAddToSaveSet(xdisplay, w);
}

static int parent_eq(Window wnd, Window might_be_parent) {
	Window	     root, parent;
	Window*	     children;
	unsigned int nchildren;

	XQueryTree(xdisplay, wnd, &root, &parent, &children, &nchildren);
	if(children != NULL) XFree(children);

	if(parent == might_be_parent) return 1;
	if(parent != root) return parent_eq(parent, might_be_parent);
	return 0;
}

static void set_stuff(Window wnd) {
	Atom	       type;
	int	       format;
	unsigned long  nitem, after;
	unsigned char* buf	 = NULL;
	Atom	       atom_name = XInternAtom(xdisplay, "WM_NAME", False);
	Atom	       atom_icon = XInternAtom(xdisplay, "_NET_WM_ICON", False);
	Atom	       utf8	 = XInternAtom(xdisplay, "UTF8_STRING", False);
	int	       i;

	for(i = 0; i < arrlen(windows); i++) {
		if(windows[i].client == wnd) {
			XClassHint*    ch  = XAllocClassHint();
			int	       def = 1;
			int	       l   = 0;
			int	       wid = 2048, hei = 2048;
			unsigned char* data = NULL;

			while(1) {
				l += 2;
				if(def && XGetWindowProperty(xdisplay, wnd, atom_icon, l - 2, 2, False, XA_CARDINAL, &type, &format, &nitem, &after, &buf) == Success && buf != NULL) {
					if(nitem == 2) {
						long* b = (long*)buf;
						int   w = b[0], h = b[1];

						l += w * h;

						XFree(buf);

						if(w <= 1024 && h <= 1024) {
							if(w == 16 || h == 16 || w < wid || h < hei) {
								if(data != NULL) free(data);
								data = malloc(4 * w * h);

								if(XGetWindowProperty(xdisplay, wnd, atom_icon, l - w * h, w * h, False, XA_CARDINAL, &type, &format, &nitem, &after, &buf) == Success && buf != NULL) {
									if(nitem == w * h) {
										int i;
										b = (long*)buf;
										for(i = 0; i < w * h; i++) {
											data[4 * i + 0] = (b[i] >> 16) & 0xff;
											data[4 * i + 1] = (b[i] >> 8) & 0xff;
											data[4 * i + 2] = (b[i] >> 0) & 0xff;
											data[4 * i + 3] = (b[i] >> 24) & 0xff;
										}
									}

									XFree(buf);
								}

								wid = w;
								hei = h;
							}
						}
					} else {
						XFree(buf);

						break;
					}
				} else {
					break;
				}
			}

			if(def && data != NULL) {
				wm_set_icon(windows[i].frame, data, wid, hei);

				free(data);

				def = 0;
			}

			if(def && XGetClassHint(xdisplay, wnd, ch)) {
				if(wm_set_icon_by_name(windows[i].frame, NULL, ch->res_name)) def = 0;
			}

			XFree(ch);

			if(def) {
				wm_set_icon_by_name(windows[i].frame, NULL, "unknown");
			}

			if(XGetWindowProperty(xdisplay, wnd, atom_name, 0, 1024, False, AnyPropertyType, &type, &format, &nitem, &after, &buf) == Success && buf != NULL) {
				if(type == XA_STRING || type == utf8) wm_set_name(windows[i].frame, buf);
				XFree(buf);
			}
		}
	}
}

static int is_no_border(Window window) {
	Atom	       atom = XInternAtom(xdisplay, "_MOTIF_WM_HINTS", False);
	Atom	       type;
	int	       format;
	unsigned long  nitem, after;
	unsigned char* buf = NULL;
	mwm_hints_t*   mwm;

	if(XGetWindowProperty(xdisplay, window, atom, 0, sizeof(*mwm) / sizeof(long), False, AnyPropertyType, &type, &format, &nitem, &after, &buf) == Success && buf != NULL) {
		if(type == atom && nitem == (sizeof(*mwm) / sizeof(long))) {
			mwm = (mwm_hints_t*)buf;

			if(mwm->flags & MWM_HINTS_DECORATIONS) {
				if(mwm->decorations == 0) {
					XFree(buf);

					return 1;
				}
			} else {
				XFree(buf);

				return 1;
			}
		}
		XFree(buf);
	}

	return 0;
}

static void bring_up(void) {
	int i;
	for(i = 0; i < arrlen(wnd); i++) {
		XWindowAttributes xwa;

		XGetWindowAttributes(xdisplay, wnd[i], &xwa);

		if(xwa.override_redirect) XRaiseWindow(xdisplay, wnd[i]);
	}
}

void loop_x(void) {
	XEvent	     ev;
	Window	     root, parent;
	Window*	     children;
	unsigned int nchildren;
	int	     i;

	begin_error();

	XQueryTree(xdisplay, DefaultRootWindow(xdisplay), &root, &parent, &children, &nchildren);
	if(children != NULL) {
		for(i = 0; i < nchildren; i++) {
			window_t	  w;
			XWindowAttributes xwa;

			if(XGetWindowAttributes(xdisplay, children[i], &xwa)) {
				if(xwa.override_redirect || xwa.map_state != IsViewable || is_no_border(children[i])) continue;

				w.frame	 = wm_frame(xwa.width, xwa.height);
				w.client = children[i];

				XUnmapWindow(xdisplay, children[i]);

				save(w.client);

				arrput(windows, w);

				set_stuff(w.client);
			}
		}
		XFree(children);
	}

	while(1) {
		XNextEvent(xdisplay, &ev);
		if((ev.type == ButtonPress || ev.type == ButtonRelease) && ev.xbutton.button == Button1) {
			Window w = None, t = ev.xbutton.window;
			if(ev.xbutton.subwindow != None) t = ev.xbutton.subwindow;
			if(ev.type == ButtonPress) {
				for(i = 0; i < arrlen(windows); i++) {
					if(windows[i].frame != NULL && (windows[i].frame->lowlevel->x11.window == t || parent_eq(t, windows[i].frame->lowlevel->x11.window))) {
						set_focus(windows[i].client);
						w = windows[i].frame->lowlevel->x11.window;
						break;
					}
				}
			}

			if(w == None) {
				XRaiseWindow(xdisplay, t);

				set_focus(t);
			} else {
				XRaiseWindow(xdisplay, w);
			}

			bring_up();

			XAllowEvents(xdisplay, ReplayPointer, CurrentTime);
		} else if(ev.type == MotionNotify && ev.xmotion.subwindow != None) {
			Window w = None, t = ev.xmotion.window;
			if(ev.xmotion.subwindow != None) t = ev.xmotion.subwindow;
			for(i = 0; i < arrlen(windows); i++) {
				if(windows[i].frame->lowlevel->x11.window == t || parent_eq(t, windows[i].frame->lowlevel->x11.window)) {
					w = windows[i].frame->lowlevel->x11.window;
					break;
				}
			}

			if(w != None) {
				XRaiseWindow(xdisplay, w);
				bring_up();
			}

			XAllowEvents(xdisplay, ReplayPointer, CurrentTime);
		} else if(ev.type == FocusIn && ev.xfocus.window != focus) {
			set_focus(focus);
		} else if(ev.type == ConfigureRequest) {
			XWindowChanges xwc;
			int	       i;
			Window	       w = ev.xconfigurerequest.window;
			for(i = 0; i < arrlen(windows); i++) {
				if(windows[i].frame != NULL && windows[i].frame->lowlevel->x11.window == w) {
					XConfigureEvent ev2;

					xwc.x	   = wm_content_x();
					xwc.y	   = wm_content_y();
					xwc.width  = wm_content_width(ev.xconfigurerequest.width);
					xwc.height = wm_content_height(ev.xconfigurerequest.height);

					XConfigureWindow(xdisplay, windows[i].client, CWX | CWY | CWWidth | CWHeight, &xwc);

					ev2.type    = ConfigureNotify;
					ev2.display = xdisplay;
					ev2.event   = windows[i].client;
					ev2.x	    = ev.xconfigurerequest.x + wm_content_x();
					ev2.y	    = ev.xconfigurerequest.y + wm_content_y();
					ev2.width   = xwc.width;
					ev2.height  = xwc.height;
					XSendEvent(xdisplay, windows[i].client, False, StructureNotifyMask, (XEvent*)&ev2);
					break;
				}
			}

			xwc.x	   = ev.xconfigurerequest.x;
			xwc.y	   = ev.xconfigurerequest.y;
			xwc.width  = ev.xconfigurerequest.width;
			xwc.height = ev.xconfigurerequest.height;

			XConfigureWindow(xdisplay, w, ev.xconfigurerequest.value_mask, &xwc);
		} else if(ev.type == ConfigureNotify) {
			int i;
			for(i = 0; i < arrlen(windows); i++) {
				if(windows[i].frame != NULL && windows[i].client == ev.xconfigure.window) {
					XWindowChanges	  xwc;
					XWindowAttributes xwa;

					xwc.x	   = ev.xconfigure.x;
					xwc.y	   = ev.xconfigure.y;
					xwc.width  = wm_entire_width(ev.xconfigure.width);
					xwc.height = wm_entire_height(ev.xconfigure.height);

					XGetWindowAttributes(xdisplay, windows[i].frame->lowlevel->x11.window, &xwa);

					if(xwc.x != wm_content_x() || xwc.y != wm_content_y()) {
						XConfigureWindow(xdisplay, windows[i].frame->lowlevel->x11.window, CWX | CWY | CWWidth | CWHeight, &xwc);

						xwc.x = wm_content_x();
						xwc.y = wm_content_y();
						XConfigureWindow(xdisplay, windows[i].client, CWX | CWY, &xwc);
					} else if(xwa.width != xwc.width || xwa.height != xwc.height) {
						XConfigureWindow(xdisplay, windows[i].frame->lowlevel->x11.window, CWWidth | CWHeight, &xwc);
					}

					break;
				}
			}
		} else if(ev.type == CreateNotify) {
			XWindowAttributes xwa;

			if(!ev.xcreatewindow.override_redirect) {
				XGetWindowAttributes(xdisplay, DefaultRootWindow(xdisplay), &xwa);

				XMoveWindow(xdisplay, ev.xcreatewindow.window, rand() % (xwa.width - wm_entire_width(ev.xcreatewindow.width)), rand() % (xwa.height - wm_entire_height(ev.xcreatewindow.height)));
			}
		} else if(ev.type == DestroyNotify) {
			for(i = 0; i < arrlen(windows); i++) {
				if(windows[i].frame != NULL && windows[i].client == ev.xdestroywindow.window) {
					wm_destroy(windows[i].frame);
					arrdel(windows, i);
					break;
				}
			}

			for(i = 0; i < arrlen(wnd); i++) {
				if(wnd[i] == ev.xdestroywindow.window) {
					arrdel(wnd, i);
					break;
				}
			}
		} else if(ev.type == MapRequest) {
			window_t	  w;
			int		  i;
			int		  ret = 0;
			XWindowAttributes xwa, xwar;
			XConfigureEvent	  ev2;
			int		  mx, my;

			if(!XGetWindowAttributes(xdisplay, ev.xmaprequest.window, &xwa)) continue;
			/* ?? ? ? ???? ?? ? ? */
			if(xwa.override_redirect || is_no_border(ev.xmaprequest.window)) {
				w.frame	  = NULL;
				w.client  = ev.xmaprequest.window;
				w.working = 1;
				arrput(windows, w);

				XMapWindow(xdisplay, ev.xmaprequest.window);

				if(xwa.override_redirect) {
					arrput(wnd, ev.xmaprequest.window);

					save(ev.xmaprequest.window);
				}
				continue;
			}

			for(i = 0; i < arrlen(windows); i++) {
				if(windows[i].frame != NULL && windows[i].frame->lowlevel->x11.window == ev.xmaprequest.window) break;
				if(windows[i].client == ev.xmaprequest.window) {
					/* what? */
					ret = 1;
					break;
				}
			}
			if(ret) continue;
			if(i != arrlen(windows)) {
				XWindowAttributes xwa;
				int		  rev;
				Window		  cfocus;

				if(!XGetWindowAttributes(xdisplay, windows[i].client, &xwa)) {
					wm_destroy(windows[i].frame);
					arrdel(windows, i);
					continue;
				}

				if(xwa.override_redirect) {
					wm_destroy(windows[i].frame);
					arrdel(windows, i);
					continue;
				}

				ev2.type    = ConfigureNotify;
				ev2.display = xdisplay;
				ev2.event   = windows[i].client;
				ev2.x	    = xwa.x + wm_content_x();
				ev2.y	    = xwa.y + wm_content_y();
				ev2.width   = xwa.width;
				ev2.height  = xwa.height;
				XSendEvent(xdisplay, windows[i].client, False, StructureNotifyMask, (XEvent*)&ev2);

				XMoveWindow(xdisplay, ev.xmaprequest.window, xwa.x, xwa.y);
				XMapWindow(xdisplay, ev.xmaprequest.window);
				do {
					XFlush(xdisplay);
					XGetWindowAttributes(xdisplay, ev.xmaprequest.window, &xwa);
				} while(xwa.map_state != IsViewable);

				XGrabServer(xdisplay);
				if(!XReparentWindow(xdisplay, windows[i].client, wm_get_inside(windows[i].frame)->lowlevel->x11.window, wm_content_x(), wm_content_y())) {
					wm_destroy(windows[i].frame);
					arrdel(windows, i);
					continue;
				}
				XUngrabServer(xdisplay);
				XMapWindow(xdisplay, windows[i].client);

				set_focus(windows[i].client);

				continue;
			}

			w.frame	  = wm_frame(xwa.width, xwa.height);
			w.client  = ev.xmaprequest.window;
			w.working = 1;

			save(w.client);

			if(ret) {
				wm_destroy(w.frame);
			} else {
				arrput(windows, w);

				set_stuff(w.client);
			}

			XGetWindowAttributes(xdisplay, DefaultRootWindow(xdisplay), &xwar);

			mx = (xwar.width - wm_entire_width(xwa.width));
			my = (xwar.height - wm_entire_height(xwa.height) - 46);

			for(i = 0; i < arrlen(wnd); i++) {
				if(wnd[i] == w.client) break;
			}
			if(i == arrlen(wnd)) {
				XMoveWindow(xdisplay, w.client, mx == 0 ? 0 : (rand() % mx), my == 0 ? 0 : (rand() % my));
				arrput(wnd, w.client);
			}
		} else if(ev.type == PropertyNotify) {
			int i;
			for(i = 0; i < arrlen(windows); i++) {
				if(windows[i].client == ev.xproperty.window) {
					break;
				}
			}
			if(arrlen(windows) == i) continue;

			if(ev.xproperty.atom == XInternAtom(xdisplay, "WM_NAME", False) || ev.xproperty.atom == XInternAtom(xdisplay, "WM_CLASS", False) || ev.xproperty.atom == XInternAtom(xdisplay, "_NET_WM_ICON", False)) {
				set_stuff(windows[i].client);
			}
		} else if(ev.type == MapNotify) {
			int		  i;
			XWindowAttributes xwa;
			if(!XGetWindowAttributes(xdisplay, ev.xmap.window, &xwa)) continue;
			if(xwa.override_redirect) {
				for(i = 0; i < arrlen(wnd); i++) {
					if(wnd[i] == ev.xmap.window) {
						break;
					}
				}

				if(i == arrlen(wnd)) arrput(wnd, ev.xmap.window);
				continue;
			}

			for(i = 0; i < arrlen(windows); i++) {
				if(windows[i].client == ev.xmap.window) {
					windows[i].working = 0;

					break;
				} else if(windows[i].frame != NULL && (windows[i].frame->lowlevel->x11.window == ev.xmap.window || nofocus == ev.xmap.window)) {
					break;
				}
			}

			if(i == arrlen(windows)) {
				window_t	  w;
				XWindowAttributes xwa;

				XGetWindowAttributes(xdisplay, ev.xmap.window, &xwa);

				w.frame	  = wm_frame(xwa.width, xwa.height);
				w.client  = ev.xmap.window;
				w.working = 1;
				save(w.client);
				arrput(windows, w);
			}
		} else if(ev.type == UnmapNotify) {
			int i;
			int nvm = 0;
			for(i = 0; i < arrlen(windows); i++) {
				if(windows[i].client == ev.xunmap.window) {
					XWindowAttributes xwa;
					int		  x, y;

					if(XGetWindowAttributes(xdisplay, windows[i].client, &xwa)) {
						if(xwa.map_state == IsViewable) {
							nvm = 1;
							break;
						}
					} else if(windows[i].working) {
						nvm = 1;
						break;
					}

					x = xwa.x;
					y = xwa.y;

					if(windows[i].frame != NULL) {
						if(XGetWindowAttributes(xdisplay, windows[i].frame->lowlevel->x11.window, &xwa)) {
							XReparentWindow(xdisplay, windows[i].client, DefaultRootWindow(xdisplay), xwa.x + x, xwa.y + y);
						}

						wm_destroy(windows[i].frame);
					}
					arrdel(windows, i);
					break;
				}
			}
			if(nvm) continue;

			if(focus == ev.xunmap.window) {
				Window w = None;
				int    i;

				for(i = arrlen(windows) - 1; i >= 0; i--) {
					XWindowAttributes xwa;

					XGetWindowAttributes(xdisplay, windows[i].client, &xwa);
					if(xwa.map_state == IsViewable) {
						w = windows[i].client;
					}
				}

				set_focus(w);
			}
		} else if(ev.type == ClientMessage) {
			if(ev.xclient.message_type == XInternAtom(xdisplay, "WM_PROTOCOLS", False) && ev.xclient.data.l[0] == milkwm_set_focus) {
				set_focus(ev.xclient.data.l[1]);
			}
		}
	}
	end_error();

	arrfree(wnd);
}

void set_focus_x(MwWidget widget) {
	int i;

	for(i = 0; i < arrlen(windows); i++) {
		if(windows[i].frame == widget) {
			XEvent ev;

			ev.type			= ClientMessage;
			ev.xclient.window	= nofocus;
			ev.xclient.message_type = XInternAtom(xdisplay, "WM_PROTOCOLS", False);
			ev.xclient.format	= 32;
			ev.xclient.data.l[0]	= milkwm_set_focus;
			ev.xclient.data.l[1]	= windows[i].client;

			XSendEvent(xdisplay, nofocus, False, 0, &ev);

			XRaiseWindow(xdisplay, windows[i].frame->lowlevel->x11.window);
			bring_up();

			break;
		}
	}
}

void delete_x(MwWidget widget) {
	int i;

	for(i = 0; i < arrlen(windows); i++) {
		if(windows[i].frame == widget) {
			XEvent ev;

			ev.type			= ClientMessage;
			ev.xclient.window	= windows[i].client;
			ev.xclient.message_type = XInternAtom(xdisplay, "WM_PROTOCOLS", False);
			ev.xclient.format	= 32;
			ev.xclient.data.l[0]	= XInternAtom(xdisplay, "WM_DELETE_WINDOW", False);
			ev.xclient.data.l[1]	= CurrentTime;

			XSendEvent(xdisplay, windows[i].client, False, 0, &ev);

			break;
		}
	}
}