/*
 * See LICENSE file for copyright and license details.
 */

/* stuff for hot-reload */
#define _GNU_SOURCE
#include <dlfcn.h>
#include <limits.h>
#include <unistd.h>
#include <libgen.h>
#include <errno.h>

#include <limits.h>
#include <getopt.h>
#include <libinput.h>
#include <linux/input-event-codes.h>
#include <math.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <wayland-server-core.h>
#include <wlr/backend.h>
#include <wlr/backend/libinput.h>
#include <wlr/render/allocator.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_alpha_modifier_v1.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_cursor.h>
#include <wlr/types/wlr_cursor_shape_v1.h>
#include <wlr/types/wlr_data_control_v1.h>
#include <wlr/types/wlr_data_device.h>
#include <wlr/types/wlr_drm.h>
#include <wlr/types/wlr_export_dmabuf_v1.h>
#include <wlr/types/wlr_fractional_scale_v1.h>
#include <wlr/types/wlr_gamma_control_v1.h>
#include <wlr/types/wlr_idle_inhibit_v1.h>
#include <wlr/types/wlr_idle_notify_v1.h>
#include <wlr/types/wlr_input_device.h>
#include <wlr/types/wlr_keyboard.h>
#include <wlr/types/wlr_keyboard_group.h>
#include <wlr/types/wlr_layer_shell_v1.h>
#include <wlr/types/wlr_linux_dmabuf_v1.h>
#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/types/wlr_output_management_v1.h>
#include <wlr/types/wlr_output_power_management_v1.h>
#include <wlr/types/wlr_pointer.h>
#include <wlr/types/wlr_pointer_constraints_v1.h>
#include <wlr/types/wlr_pointer_gestures_v1.h>
#include <wlr/types/wlr_presentation_time.h>
#include <wlr/types/wlr_primary_selection.h>
#include <wlr/types/wlr_primary_selection_v1.h>
#include <wlr/types/wlr_relative_pointer_v1.h>
#include <wlr/types/wlr_scene.h>
#include <wlr/types/wlr_screencopy_v1.h>
#include <wlr/types/wlr_seat.h>
#include <wlr/types/wlr_server_decoration.h>
#include <wlr/types/wlr_session_lock_v1.h>
#include <wlr/types/wlr_single_pixel_buffer_v1.h>
#include <wlr/types/wlr_subcompositor.h>
#include <wlr/types/wlr_viewporter.h>
#include <wlr/types/wlr_virtual_keyboard_v1.h>
#include <wlr/types/wlr_virtual_pointer_v1.h>
#include <wlr/types/wlr_xcursor_manager.h>
#include <wlr/types/wlr_xdg_activation_v1.h>
#include <wlr/types/wlr_xdg_decoration_v1.h>
#include <wlr/types/wlr_xdg_output_v1.h>
#include <wlr/types/wlr_xdg_shell.h>
#include <wlr/util/log.h>
#include <wlr/util/region.h>
#include <xkbcommon/xkbcommon.h>
#ifdef XWAYLAND
#include <wlr/xwayland.h>
#include <xcb/xcb.h>
#include <xcb/xcb_icccm.h>
#endif


#include "util.h"

/* macros */
#define MAX(A, B)               ((A) > (B) ? (A) : (B))
#define MIN(A, B)               ((A) < (B) ? (A) : (B))
#define CLEANMASK(mask)         (mask & ~WLR_MODIFIER_CAPS)
#define VISIBLEON(C, M)         ((M) && ((!(M)->wlr_output && (C)->scratchkey != 0 && (C)->scratchkey == current_scratch) \
                                         || ((C)->mon == (M) && ((C)->tags & (M)->tagset[(M)->seltags]))))
#define LENGTH(X)               (sizeof X / sizeof X[0])
#define END(A)                  ((A) + LENGTH(A))
#define TAGMASK                 ((1u << TAGCOUNT) - 1)

#define SYM(a) dlsym(dwl_module, #a)
#define TSYM(T, a) ((T)SYM(a))
#define CSYM(T, a) *(TSYM(T*, a))

#define LISTEN(E, L, H)         do { \
                                    (L)->notify = SYM(H); \
                                    listeners = append_listener((L), listeners); \
                                    wl_signal_add((E), (L)); \
                                } while(0)

#define LISTEN_GLOBAL(E, L)     do { \
                                    struct wl_listener* l = SYM(L); \
                                    listeners = append_listener(l, listeners); \
                                    wl_signal_add((E), l); \
                                } while (0)

#define LISTEN_STATIC(E, H)     do { \
                                    struct wl_listener* _l = malloc(sizeof(struct wl_listener)); \
                                    _l->notify = SYM(H); \
                                    listeners = append_listener(_l, listeners); \
                                    wl_signal_add((E), _l); \
                                } while (0)

#define UNLISTEN(L)             do { \
                                    wl_list_remove(&(L)->link); \
                                    listeners = remove_listener((L), listeners);\
                                } while (0)

/* enums */
enum { CurNormal, CurPressed, CurMove, CurResize }; /* cursor */
enum { XDGShell, LayerShell, X11 }; /* client types */
enum { LyrBg, LyrBottom, LyrTile, LyrFloat, LyrTop, LyrFS, LyrOverlay, LyrBlock, NUM_LAYERS }; /* scene layers */
#ifdef XWAYLAND
enum { NetWMWindowTypeDialog, NetWMWindowTypeSplash, NetWMWindowTypeToolbar,
	NetWMWindowTypeUtility, NetLast }; /* EWMH atoms */
#endif
enum { SWIPE_LEFT, SWIPE_RIGHT, SWIPE_DOWN, SWIPE_UP };

typedef union {
	int i;
	uint32_t ui;
	float f;
	const void *v;
} Arg;

typedef struct {
	unsigned int mod;
	unsigned int button;
	void (*func)(const Arg *);
	const Arg arg;
} Button;

typedef struct TreeLayout TreeLayout;
typedef struct {
	unsigned int mod;
	unsigned int motion;
	unsigned int fingers_count;
	void (*func)(const Arg *);
	const Arg arg;
} Gesture;

typedef struct Monitor Monitor;
typedef struct Client Client;
struct Client {
	/* Must keep these three elements in this order */
	unsigned int type; /* XDGShell or X11* */
	struct wlr_box geom; /* layout-relative, includes border */
	Monitor *mon;
	struct wlr_scene_tree *scene;
	struct wlr_scene_rect *border[4]; /* top, bottom, left, right */
	struct wlr_scene_tree *scene_surface;
	struct wl_list link;
	struct wl_list flink;
	union {
		struct wlr_xdg_surface *xdg;
		struct wlr_xwayland_surface *xwayland;
	} surface;
	struct wlr_xdg_toplevel_decoration_v1 *decoration;
	struct wl_listener commit;
	struct wl_listener map;
	struct wl_listener maximize;
	struct wl_listener unmap;
	struct wl_listener destroy;
	struct wl_listener set_title;
	struct wl_listener fullscreen;
	struct wl_listener set_decoration_mode;
	struct wl_listener destroy_decoration;
	struct wlr_box prev; /* layout-relative, includes border */
	struct wlr_box bounds;
#ifdef XWAYLAND
	struct wl_listener activate;
	struct wl_listener associate;
	struct wl_listener dissociate;
	struct wl_listener configure;
	struct wl_listener set_hints;
#endif
	unsigned int bw;
	uint32_t tags;
	int isfloating, isurgent, isfullscreen, was_tiled, isterm, noswallow;
	char scratchkey;
	uint32_t resize; /* configure serial of a pending resize */
	struct wlr_box old_geom;
	struct wl_list link_tiled;
	struct wl_list link_temp;
	pid_t pid;
	Client *swallowing, *swallowedby;
};

typedef struct {
	uint32_t mod;
	xkb_keysym_t keysym;
	void (*func)(const Arg *);
	const Arg arg;
} Key;

typedef struct {
	struct wl_list link;
	struct wlr_keyboard_group *wlr_group;

	int nsyms;
	const xkb_keysym_t *keysyms; /* invalid if nsyms == 0 */
	uint32_t mods; /* invalid if nsyms == 0 */
	struct wl_event_source *key_repeat_source;

	struct wl_listener modifiers;
	struct wl_listener key;
	struct wl_listener destroy;
} KeyboardGroup;

typedef struct {
	/* Must keep these three elements in this order */
	unsigned int type; /* LayerShell */
	struct wlr_box geom;
	Monitor *mon;
	struct wlr_scene_tree *scene;
	struct wlr_scene_tree *popups;
	struct wlr_scene_layer_surface_v1 *scene_layer;
	struct wl_list link;
	int mapped;
	struct wlr_layer_surface_v1 *layer_surface;

	struct wl_listener destroy;
	struct wl_listener unmap;
	struct wl_listener surface_commit;
} LayerSurface;

typedef struct {
	const char *symbol;
	void (*arrange)(Monitor *);
} Layout;

struct Monitor {
	struct wl_list link;
	struct wlr_output *wlr_output;
	struct wlr_scene_output *scene_output;
	struct wlr_scene_rect *fullscreen_bg; /* See createmon() for info */
	struct wl_listener frame;
	struct wl_listener destroy;
	struct wl_listener request_state;
	struct wl_listener destroy_lock_surface;
	struct wlr_session_lock_surface_v1 *lock_surface;
	struct wlr_box m; /* monitor area, layout-relative */
	struct wlr_box w; /* window area, layout-relative */
	struct wl_list layers[4]; /* LayerSurface.link */
	const Layout *lt[2];
	unsigned int seltags;
	unsigned int sellt;
	uint32_t tagset[2];
	float mfact;
	int gamma_lut_changed;
	int nmaster;
	char ltsymbol[16];
	int asleep;
	TreeLayout *tree_layout;
};

typedef struct {
	const char *name;
	float mfact;
	int nmaster;
	float scale;
	const Layout *lt;
	enum wl_output_transform rr;
	int x, y;
} MonitorRule;

typedef struct {
	struct wlr_pointer_constraint_v1 *constraint;
	struct wl_listener destroy;
} PointerConstraint;

typedef struct {
	const char *id;
	const char *title;
	uint32_t tags;
	int isfloating;
	int isterm;
	int noswallow;
	int monitor;
	const char scratchkey;
} Rule;

typedef struct {
	struct wlr_scene_tree *scene;

	struct wlr_session_lock_v1 *lock;
	struct wl_listener new_surface;
	struct wl_listener unlock;
	struct wl_listener destroy;
} SessionLock;

#define static 

#ifdef HOT
/* function declarations */
static void applybounds(Client *c, struct wlr_box *bbox);
static void applyrules(Client *c);
static void arrange(Monitor *m);
static void arrangelayer(Monitor *m, struct wl_list *list,
		struct wlr_box *usable_area, int exclusive);
static void arrangelayers(Monitor *m);
static void autostartexec(void);
static void axisnotify(struct wl_listener *listener, void *data);
static void btrtile(Monitor *m);
static void buttonpress(struct wl_listener *listener, void *data);
static int ongesture(struct wlr_pointer_swipe_end_event *event);
static void swipe_begin(struct wl_listener *listener, void *data);
static void swipe_update(struct wl_listener *listener, void *data);
static void swipe_end(struct wl_listener *listener, void *data);
static void pinch_begin(struct wl_listener *listener, void *data);
static void pinch_update(struct wl_listener *listener, void *data);
static void pinch_end(struct wl_listener *listener, void *data);
static void hold_begin(struct wl_listener *listener, void *data);
static void hold_end(struct wl_listener *listener, void *data);
static void chvt(const Arg *arg);
static void checkidleinhibitor(struct wlr_surface *exclude);

#undef static
#define static extern
#endif

/* this is cold */
static void cleanup(void);

#undef static
#define static
#ifdef HOT

static void cleanupmon(struct wl_listener *listener, void *data);
static void closemon(Monitor *m);
static void commitlayersurfacenotify(struct wl_listener *listener, void *data);
static void commitnotify(struct wl_listener *listener, void *data);
static void commitpopup(struct wl_listener *listener, void *data);
static void createdecoration(struct wl_listener *listener, void *data);
static void createidleinhibitor(struct wl_listener *listener, void *data);
static void createkeyboard(struct wlr_keyboard *keyboard);
static KeyboardGroup *createkeyboardgroup(void);
static void createlayersurface(struct wl_listener *listener, void *data);
static void createlocksurface(struct wl_listener *listener, void *data);
static void createmon(struct wl_listener *listener, void *data);
static void createnotify(struct wl_listener *listener, void *data);
static void createpointer(struct wlr_pointer *pointer);
static void createpointerconstraint(struct wl_listener *listener, void *data);
static void createpopup(struct wl_listener *listener, void *data);
static void cursorconstrain(struct wlr_pointer_constraint_v1 *constraint);
static void cursorframe(struct wl_listener *listener, void *data);
static void cursorwarptohint(void);
static void destroydecoration(struct wl_listener *listener, void *data);
static void destroydragicon(struct wl_listener *listener, void *data);
static void destroyidleinhibitor(struct wl_listener *listener, void *data);
static void destroylayersurfacenotify(struct wl_listener *listener, void *data);
static void destroylock(SessionLock *lock, int unlocked);
static void destroylocksurface(struct wl_listener *listener, void *data);
static void destroynotify(struct wl_listener *listener, void *data);
static void destroypointerconstraint(struct wl_listener *listener, void *data);
static void destroysessionlock(struct wl_listener *listener, void *data);
static void destroysessionmgr(struct wl_listener *listener, void *data);
static void destroykeyboardgroup(struct wl_listener *listener, void *data);
static Monitor *dirtomon(enum wlr_direction dir);
static void focusclient(Client *c, int lift);
static void focusmon(const Arg *arg);
static void focusortogglescratch(const Arg *arg);
static void focusstack(const Arg *arg);
static Client *focustop(Monitor *m);
static void fullscreennotify(struct wl_listener *listener, void *data);
static void gpureset(struct wl_listener *listener, void *data);
static void handlesig(int signo);
static void incnmaster(const Arg *arg);
static void inputdevice(struct wl_listener *listener, void *data);
static int keybinding(uint32_t mods, xkb_keysym_t sym);
static void keypress(struct wl_listener *listener, void *data);
static void keypressmod(struct wl_listener *listener, void *data);
static int keyrepeat(void *data);
static void killclient(const Arg *arg);
static void locksession(struct wl_listener *listener, void *data);
static void mapnotify(struct wl_listener *listener, void *data);
static void maximizenotify(struct wl_listener *listener, void *data);
static void monocle(Monitor *m);
static void motionabsolute(struct wl_listener *listener, void *data);
static void motionnotify(uint32_t time, struct wlr_input_device *device, double sx,
		double sy, double sx_unaccel, double sy_unaccel);
static void motionrelative(struct wl_listener *listener, void *data);
static void moveresize(const Arg *arg);
static void outputmgrapply(struct wl_listener *listener, void *data);
static void outputmgrapplyortest(struct wlr_output_configuration_v1 *config, int test);
static void outputmgrtest(struct wl_listener *listener, void *data);
static void pointerfocus(Client *c, struct wlr_surface *surface,
		double sx, double sy, uint32_t time);
static void printstatus(void);
static void powermgrsetmode(struct wl_listener *listener, void *data);
static void quit(const Arg *arg);
static void rendermon(struct wl_listener *listener, void *data);
static void requestdecorationmode(struct wl_listener *listener, void *data);
static void requeststartdrag(struct wl_listener *listener, void *data);
static void requestmonstate(struct wl_listener *listener, void *data);
static void resize(Client *c, struct wlr_box geo, int interact);

#undef static
#define static extern
#endif

/* this is cold */
static void run(char *startup_cmd);

#ifdef HOT
#undef static
#define static

static void setcursor(struct wl_listener *listener, void *data);
static void setcursorshape(struct wl_listener *listener, void *data);
static void setfloating(Client *c, int floating);
static void setfullscreen(Client *c, int fullscreen);
static void setgamma(struct wl_listener *listener, void *data);
static void setlayout(const Arg *arg);
static void setmfact(const Arg *arg);
static void setmon(Client *c, Monitor *m, uint32_t newtags);
static void setpsel(struct wl_listener *listener, void *data);
static void setsel(struct wl_listener *listener, void *data);

#undef static
#define static extern
#endif

/* this is cold */
static void setup(void);

#ifdef HOT
#undef static
#define static

static void setratio_h(const Arg *arg);
static void setratio_v(const Arg *arg);
static void swapclients(const Arg *arg);
static void spawn(const Arg *arg);
static void spawnscratch(const Arg *arg);
static void startdrag(struct wl_listener *listener, void *data);
static void tag(const Arg *arg);
static void tagmon(const Arg *arg);
static void tile(Monitor *m);
static void togglefloating(const Arg *arg);
static void togglefullscreen(const Arg *arg);
static void togglescratch(const Arg *arg);
static void toggletag(const Arg *arg);
static void toggleview(const Arg *arg);
static void unlocksession(struct wl_listener *listener, void *data);
static void unmaplayersurfacenotify(struct wl_listener *listener, void *data);
static void unmapnotify(struct wl_listener *listener, void *data);
static void updatemons(struct wl_listener *listener, void *data);
static void updatetitle(struct wl_listener *listener, void *data);
static void urgent(struct wl_listener *listener, void *data);
static void view(const Arg *arg);
static void virtualkeyboard(struct wl_listener *listener, void *data);
static void virtualpointer(struct wl_listener *listener, void *data);
static Monitor *xytomon(double x, double y);
static void xytonode(double x, double y, struct wlr_surface **psurface,
		Client **pc, LayerSurface **pl, double *nx, double *ny);
static void zoom(const Arg *arg);

#endif

#ifdef HOT
    #undef static
    #define static extern
#else
    #undef static
    #define static 
#endif
static pid_t getparentprocess(pid_t p);
static int isdescprocess(pid_t p, pid_t c);
static Client *termforwin(Client *w);
static void swallow(Client *c, Client *w);

/* variables */
static const char broken[] = "broken";
static pid_t child_pid = -1;
static int locked;
static void *exclusive_focus;
static struct wl_display *dpy;
static struct wl_event_loop *event_loop;
static struct wlr_backend *backend;
static struct wlr_scene *scene;
static struct wlr_scene_tree *layers[NUM_LAYERS];
static struct wlr_scene_tree *drag_icon;
/* Map from ZWLR_LAYER_SHELL_* constants to Lyr* enum */
static const int layermap[] = { LyrBg, LyrBottom, LyrTop, LyrOverlay };
static struct wlr_renderer *drw;
static struct wlr_allocator *alloc;
static struct wlr_compositor *compositor;
static struct wlr_session *session;

static struct wlr_xdg_shell *xdg_shell;
static struct wlr_xdg_activation_v1 *activation;
static struct wlr_xdg_decoration_manager_v1 *xdg_decoration_mgr;
static struct wl_list clients; /* tiling order */
static struct wl_list fstack;  /* focus order */
static struct wlr_idle_notifier_v1 *idle_notifier;
static struct wlr_idle_inhibit_manager_v1 *idle_inhibit_mgr;
static struct wlr_layer_shell_v1 *layer_shell;
static struct wlr_output_manager_v1 *output_mgr;
static struct wlr_gamma_control_manager_v1 *gamma_control_mgr;
static struct wlr_virtual_keyboard_manager_v1 *virtual_keyboard_mgr;
static struct wlr_virtual_pointer_manager_v1 *virtual_pointer_mgr;
static struct wlr_cursor_shape_manager_v1 *cursor_shape_mgr;
static struct wlr_output_power_manager_v1 *power_mgr;
static struct wlr_pointer_gestures_v1 *pointer_gestures;

static struct wlr_pointer_constraints_v1 *pointer_constraints;
static struct wlr_relative_pointer_manager_v1 *relative_pointer_mgr;
static struct wlr_pointer_constraint_v1 *active_constraint;

static struct wlr_cursor *cursor;
static struct wlr_xcursor_manager *cursor_mgr;

static struct wlr_scene_rect *root_bg;
static struct wlr_session_lock_manager_v1 *session_lock_mgr;
static struct wlr_scene_rect *locked_bg;
static struct wlr_session_lock_v1 *cur_lock;
#ifdef HOT
static struct wl_listener lock_listener = {.notify = locksession};
#endif

static struct wlr_seat *seat;
static KeyboardGroup *kb_group;
static unsigned int cursor_mode;
static Client *grabc;
static int grabcx, grabcy; /* client-relative */

static struct wlr_output_layout *output_layout;
static struct wlr_box sgeom;
static struct wl_list mons;
static Monitor *selmon;

static uint32_t swipe_fingers = 0;
static double swipe_dx = 0;
static double swipe_dy = 0;

static char current_scratch;
static pid_t next_scratch;

#ifdef XWAYLAND
static void activatex11(struct wl_listener *listener, void *data);
static void associatex11(struct wl_listener *listener, void *data);
static void configurex11(struct wl_listener *listener, void *data);
static void createnotifyx11(struct wl_listener *listener, void *data);
static void dissociatex11(struct wl_listener *listener, void *data);
static xcb_atom_t getatom(xcb_connection_t *xc, const char *name);
static void sethints(struct wl_listener *listener, void *data);
static void xwaylandready(struct wl_listener *listener, void *data);
static struct wlr_xwayland *xwayland;
static xcb_atom_t netatom[NetLast];
#endif

/* undoes the shadowing of static from above */
#undef static 

/* this is where we put global hot-reload state */
#ifdef HOT 
#define COLD extern
#else
#define COLD

static void* load(void);
static const char* get_module_path(void);

#endif

COLD void * dwl_module = NULL;
COLD void * last_module = NULL;
COLD struct listens* listeners = NULL;
COLD void reload(const Arg* arg);

#ifndef HOT
static char* runpath;

#endif


#ifdef HOT

/* configuration, allows nested code to access above variables */
#include "config.h"

/* attempt to encapsulate suck into one file */
#include "client.h"
#define static
#include "btrtile.c"
#undef static
static const unsigned int abzsquare = swipe_min_threshold * swipe_min_threshold;

#define static extern
#else
#define static
#endif

static pid_t *autostart_pids;
static size_t autostart_len;

#undef static
#ifdef HOT

/* function implementations */
void
applybounds(Client *c, struct wlr_box *bbox)
{
	/* set minimum possible */
	c->geom.width = MAX(1 + 2 * (int)c->bw, c->geom.width);
	c->geom.height = MAX(1 + 2 * (int)c->bw, c->geom.height);

	if (c->geom.x >= bbox->x + bbox->width)
		c->geom.x = bbox->x + bbox->width - c->geom.width;
	if (c->geom.y >= bbox->y + bbox->height)
		c->geom.y = bbox->y + bbox->height - c->geom.height;
	if (c->geom.x + c->geom.width <= bbox->x)
		c->geom.x = bbox->x;
	if (c->geom.y + c->geom.height <= bbox->y)
		c->geom.y = bbox->y;
}

void
applyrules(Client *c)
{
	/* rule matching */
	const char *appid, *title;
	uint32_t newtags = 0;
	int i;
	pid_t pid;
	const Rule *r;
	Monitor *mon = selmon, *m;

	wl_client_get_credentials(c->surface.xdg->client->client, &pid, NULL, NULL);

	c->isfloating = client_is_float_type(c);
	c->scratchkey = current_scratch;
	if (!(appid = client_get_appid(c)))
		appid = broken;
	if (!(title = client_get_title(c)))
		title = broken;

	c->pid = client_get_pid(c);

	for (r = rules; r < END(rules); r++) {
		if ((!r->title || strstr(title, r->title))
				&& (!r->id || strstr(appid, r->id))) {
			c->isfloating = r->isfloating;
			if (r->scratchkey != 0)
    			c->scratchkey = r->scratchkey;
			c->isterm     = r->isterm;
			c->noswallow  = r->noswallow;
			newtags |= r->tags;
			i = 0;
			wl_list_for_each(m, &mons, link) {
				if (r->monitor == i++)
					mon = m;
			}
		}
	}
	if (!c->noswallow && !client_is_float_type(c)
			&& !c->surface.xdg->initial_commit) {
		Client *p = termforwin(c);
		if (p) {
			c->swallowedby = p;
			p->swallowing  = c;
			wl_list_remove(&c->link);
			wl_list_remove(&c->flink);
			swallow(c, p);
			wl_list_remove(&p->link);
			wl_list_remove(&p->flink);
			mon = p->mon;
			newtags = p->tags;
		}
	}
	if (pid == next_scratch)
    	c->scratchkey = current_scratch;
	setmon(c, mon, newtags);
}

void
arrange(Monitor *m)
{
	Client *c;
	Monitor scratchmon = *m;
	scratchmon.tagset[0] = 0;
	scratchmon.tagset[1] = 0;
	scratchmon.wlr_output = NULL;
	scratchmon.w.x += (int)(scratchmon.w.width * (1 - scratchfactor)/2);
	scratchmon.w.y += (int)(scratchmon.w.height * (1 - scratchfactor)/2);
	scratchmon.w.width = (int)(scratchmon.w.width * scratchfactor);
	scratchmon.w.height = (int)(scratchmon.w.height * scratchfactor);

	if (!m->wlr_output->enabled)
		return;

	wl_list_for_each(c, &clients, link) {
    	if (c->scratchkey != 0) {
        	c->mon = &scratchmon;
            wlr_scene_node_set_enabled(&c->scene->node, c->scratchkey == current_scratch);
            client_set_suspended(c, c->scratchkey != current_scratch);
    	}
		if (c->mon == m) {
			wlr_scene_node_set_enabled(&c->scene->node, VISIBLEON(c, m));
			client_set_suspended(c, !VISIBLEON(c, m));
		}
	}

	wlr_scene_node_set_enabled(&m->fullscreen_bg->node,
			(c = focustop(m)) && c->isfullscreen);

	strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, LENGTH(m->ltsymbol));

	/* We move all clients (except fullscreen and unmanaged) to LyrTile while
	 * in floating layout to avoid "real" floating clients be always on top */
	wl_list_for_each(c, &clients, link) {
		if (c->mon != m || c->scene->node.parent == layers[LyrFS])
			continue;

		wlr_scene_node_reparent(&c->scene->node,
				(!m->lt[m->sellt]->arrange && c->isfloating)
						? layers[LyrTile]
						: (m->lt[m->sellt]->arrange && c->isfloating)
								? layers[LyrFloat]
								: c->scene->node.parent);
	}

	if (m->lt[m->sellt]->arrange) {
		m->lt[m->sellt]->arrange(m);
		m->lt[m->sellt]->arrange(&scratchmon);
	}

    wl_list_for_each(c, &clients, link) 
        if (c->mon == &scratchmon) {
            c->mon = m;
            wlr_scene_node_reparent(&c->scene->node, layers[LyrFloat]);
        }

	motionnotify(0, NULL, 0, 0, 0, 0);
	checkidleinhibitor(NULL);
}

void
arrangelayer(Monitor *m, struct wl_list *list, struct wlr_box *usable_area, int exclusive)
{
	LayerSurface *l;
	struct wlr_box full_area = m->m;

	wl_list_for_each(l, list, link) {
		struct wlr_layer_surface_v1 *layer_surface = l->layer_surface;

		if (exclusive != (layer_surface->current.exclusive_zone > 0))
			continue;

		wlr_scene_layer_surface_v1_configure(l->scene_layer, &full_area, usable_area);
		wlr_scene_node_set_position(&l->popups->node, l->scene->node.x, l->scene->node.y);
		l->geom.x = l->scene->node.x;
		l->geom.y = l->scene->node.y;
	}
}

void
arrangelayers(Monitor *m)
{
	int i;
	struct wlr_box usable_area = m->m;
	LayerSurface *l;
	uint32_t layers_above_shell[] = {
		ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY,
		ZWLR_LAYER_SHELL_V1_LAYER_TOP,
	};
	if (!m->wlr_output->enabled)
		return;

	/* Arrange exclusive surfaces from top->bottom */
	for (i = 3; i >= 0; i--)
		arrangelayer(m, &m->layers[i], &usable_area, 1);

	if (!wlr_box_equal(&usable_area, &m->w)) {
		m->w = usable_area;
		arrange(m);
	}

	/* Arrange non-exlusive surfaces from top->bottom */
	for (i = 3; i >= 0; i--)
		arrangelayer(m, &m->layers[i], &usable_area, 0);

	/* Find topmost keyboard interactive layer, if such a layer exists */
	for (i = 0; i < (int)LENGTH(layers_above_shell); i++) {
		wl_list_for_each_reverse(l, &m->layers[layers_above_shell[i]], link) {
			if (locked || !l->layer_surface->current.keyboard_interactive || !l->mapped)
				continue;
			/* Deactivate the focused client. */
			focusclient(NULL, 0);
			exclusive_focus = l;
			client_notify_enter(l->layer_surface->surface, wlr_seat_get_keyboard(seat));
			return;
		}
	}
}

void
autostartexec(void) {
	const char *const *p;
	size_t i = 0;

	/* count entries */
	for (p = autostart; *p; autostart_len++, p++)
		while (*++p);

	autostart_pids = calloc(autostart_len, sizeof(pid_t));
	for (p = autostart; *p; i++, p++) {
		if ((autostart_pids[i] = fork()) == 0) {
			setsid();
			execvp(*p, (char *const *)p);
			die("dwl: execvp %s:", *p);
		}
		/* skip arguments */
		while (*++p);
	}
}

void
axisnotify(struct wl_listener *listener, void *data)
{
	/* This event is forwarded by the cursor when a pointer emits an axis event,
	 * for example when you move the scroll wheel. */
	struct wlr_pointer_axis_event *event = data;
	wlr_idle_notifier_v1_notify_activity(idle_notifier, seat);
	/* TODO: allow usage of scroll whell for mousebindings, it can be implemented
	 * checking the event's orientation and the delta of the event */
	/* Notify the client with pointer focus of the axis event. */
	wlr_seat_pointer_notify_axis(seat,
			event->time_msec, event->orientation, event->delta,
			event->delta_discrete, event->source, event->relative_direction);
}

void
buttonpress(struct wl_listener *listener, void *data)
{
	struct wlr_pointer_button_event *event = data;
	struct wlr_keyboard *keyboard;
	struct wl_list *tiled_clients;
	struct wlr_surface *surface;
	double sx, sy;
	LayoutNode **root, *old_root;
	uint32_t mods, curtag, active_tags = selmon->tagset[selmon->seltags];
	Client *c, *target;
	const Button *b;

	curtag = get_current_tag(selmon);
	root = &selmon->tree_layout->root[curtag];
	tiled_clients = &selmon->tree_layout->tiled_clients[curtag];
	wlr_idle_notifier_v1_notify_activity(idle_notifier, seat);

	switch (event->state) {
	case WL_POINTER_BUTTON_STATE_PRESSED:
		cursor_mode = CurPressed;
		selmon = xytomon(cursor->x, cursor->y);
		if (locked)
			break;

		/* Change focus if the button was _pressed_ over a client */
		xytonode(cursor->x, cursor->y, NULL, &c, NULL, NULL, NULL);
		if (c && (!client_is_unmanaged(c) || client_wants_focus(c)))
			focusclient(c, 1);

		keyboard = wlr_seat_get_keyboard(seat);
		mods = keyboard ? wlr_keyboard_get_modifiers(keyboard) : 0;
		for (b = buttons; b < END(buttons); b++) {
			if (CLEANMASK(mods) == CLEANMASK(b->mod) &&
					event->button == b->button && b->func) {
				b->func(&b->arg);
				return;
			}
		}
		break;
	case WL_POINTER_BUTTON_STATE_RELEASED:
		/* If you released any buttons, we exit interactive move/resize mode. */
		/* TODO should reset to the pointer focus's current setcursor */
		if (!locked && cursor_mode != CurNormal && cursor_mode != CurPressed) {
			c = grabc;
			if (c && c->was_tiled && !strcmp(selmon->ltsymbol, "|w|")) {
				/* Check if more than one tag is active, if so we escape */
				if (active_tags && (active_tags & (active_tags - 1)))
					break;
				if (cursor_mode == CurMove && c->isfloating) {
					target = NULL;
					surface = NULL;
					xytonode(cursor->x, cursor->y, &surface, &target, NULL, &sx, &sy);

					if (target && !target->isfloating && !target->isfullscreen) {
						insert_client(selmon, target, c, root, tiled_clients);
					} else {
						if (!root) {
							*root = create_client_node(c);
							add_client_to_tiled_list(c, tiled_clients);
						} else {
							old_root = *root;
							*root = create_split_node(1, old_root, create_client_node(c));
							add_client_to_tiled_list(c, tiled_clients);
						}
					}

					setfloating(c, 0);
					arrange(selmon);

				} else if (cursor_mode == CurResize && !c->isfloating) {
					resizing_from_mouse = 0;
				}
			} else {
				if (cursor_mode == CurResize && resizing_from_mouse)
					resizing_from_mouse = 0;
			}
			/* Default behaviour */
			wlr_cursor_set_xcursor(cursor, cursor_mgr, "default");
			cursor_mode = CurNormal;
			/* Drop the window off on its new monitor */
			selmon = xytomon(cursor->x, cursor->y);
			setmon(grabc, selmon, 0);
			grabc = NULL;
			return;
		}
		cursor_mode = CurNormal;
		break;
	}
	/* If the event wasn't handled by the compositor, notify the client with
	 * pointer focus that a button press has occurred */
	wlr_seat_pointer_notify_button(seat,
			event->time_msec, event->button, event->state);
}

void
swipe_begin(struct wl_listener *listener, void *data)
{
	struct wlr_pointer_swipe_begin_event *event = data;

	swipe_fingers = event->fingers;
	// Reset swipe distance at the beginning of a swipe
	swipe_dx = 0;
	swipe_dy = 0;

	// Forward swipe begin event to client
	wlr_pointer_gestures_v1_send_swipe_begin(
		pointer_gestures, 
		seat,
		event->time_msec,
		event->fingers
	);
}

void
swipe_update(struct wl_listener *listener, void *data)
{
	struct wlr_pointer_swipe_update_event *event = data;

	swipe_fingers = event->fingers;
	// Accumulate swipe distance
	swipe_dx += event->dx;
	swipe_dy += event->dy;

	// Forward swipe update event to client
	wlr_pointer_gestures_v1_send_swipe_update(
		pointer_gestures, 
		seat,
		event->time_msec,
		event->dx,
		event->dy
	);
}

int
ongesture(struct wlr_pointer_swipe_end_event *event)
{
	struct wlr_keyboard *keyboard;
	uint32_t mods;
	const Gesture *g;
	unsigned int motion;
	unsigned int adx = (int)round(fabs(swipe_dx));
	unsigned int ady = (int)round(fabs(swipe_dy));
	int handled = 0;

	if (event->cancelled) {
		return handled;
	}

	// Require absolute distance movement beyond a small thresh-hold
	if (adx * adx + ady * ady < abzsquare) {
		return handled;
	}

	if (adx > ady) {
		motion = swipe_dx < 0 ? SWIPE_LEFT : SWIPE_RIGHT;
	} else {
		motion = swipe_dy < 0 ? SWIPE_UP : SWIPE_DOWN;
	}

	keyboard = wlr_seat_get_keyboard(seat);
	mods = keyboard ? wlr_keyboard_get_modifiers(keyboard) : 0;
	for (g = gestures; g < END(gestures); g++) {
		if (CLEANMASK(mods) == CLEANMASK(g->mod) &&
			 swipe_fingers == g->fingers_count &&
			 motion == g->motion && g->func) {
			g->func(&g->arg);
			handled = 1;
		}
	}
	return handled;
}

void
swipe_end(struct wl_listener *listener, void *data)
{
	struct wlr_pointer_swipe_end_event *event = data;

	// TODO: should we stop here if the event has been handled?
	ongesture(event);

	// Forward swipe end event to client
	wlr_pointer_gestures_v1_send_swipe_end(
		pointer_gestures, 
		seat,
		event->time_msec,
		event->cancelled
	);
}

void
pinch_begin(struct wl_listener *listener, void *data)
{
	struct wlr_pointer_pinch_begin_event *event = data;

	// Forward pinch begin event to client
	wlr_pointer_gestures_v1_send_pinch_begin(
		pointer_gestures, 
		seat,
		event->time_msec,
		event->fingers
	);
}

void
pinch_update(struct wl_listener *listener, void *data)
{
	struct wlr_pointer_pinch_update_event *event = data;

	// Forward pinch update event to client
	wlr_pointer_gestures_v1_send_pinch_update(
		pointer_gestures,
		seat,
		event->time_msec,
		event->dx,
		event->dy,
		event->scale,
		event->rotation
	);
}

void
pinch_end(struct wl_listener *listener, void *data)
{
	struct wlr_pointer_pinch_end_event *event = data;

	// Forward pinch end event to client
	wlr_pointer_gestures_v1_send_pinch_end(
		pointer_gestures,
		seat,
		event->time_msec,
		event->cancelled
	);
}

void
hold_begin(struct wl_listener *listener, void *data)
{
	struct wlr_pointer_hold_begin_event *event = data;

	// Forward hold begin event to client
	wlr_pointer_gestures_v1_send_hold_begin(
		pointer_gestures,
		seat,
		event->time_msec,
		event->fingers
	);
}

void
hold_end(struct wl_listener *listener, void *data)
{
	struct wlr_pointer_hold_end_event *event = data;

	// Forward hold end event to client
	wlr_pointer_gestures_v1_send_hold_end(
		pointer_gestures,
		seat,
		event->time_msec,
		event->cancelled
	);
}

void
chvt(const Arg *arg)
{
	wlr_session_change_vt(session, arg->ui);
}

void
checkidleinhibitor(struct wlr_surface *exclude)
{
	int inhibited = 0, unused_lx, unused_ly;
	struct wlr_idle_inhibitor_v1 *inhibitor;
	wl_list_for_each(inhibitor, &idle_inhibit_mgr->inhibitors, link) {
		struct wlr_surface *surface = wlr_surface_get_root_surface(inhibitor->surface);
		struct wlr_scene_tree *tree = surface->data;
		if (exclude != surface && (bypass_surface_visibility || (!tree
				|| wlr_scene_node_coords(&tree->node, &unused_lx, &unused_ly)))) {
			inhibited = 1;
			break;
		}
	}

	wlr_idle_notifier_v1_set_inhibited(idle_notifier, inhibited);
}

#endif

void
cleanup(void)
{
	size_t i;
#ifdef XWAYLAND
	wlr_xwayland_destroy(xwayland);
	xwayland = NULL;
#endif
	wl_display_destroy_clients(dpy);

	/* kill child processes */
	for (i = 0; i < autostart_len; i++) {
		if (0 < autostart_pids[i]) {
			kill(autostart_pids[i], SIGTERM);
			waitpid(autostart_pids[i], NULL, 0);
		}
	}

	if (child_pid > 0) {
		kill(-child_pid, SIGTERM);
		waitpid(child_pid, NULL, 0);
	}
	wlr_xcursor_manager_destroy(cursor_mgr);

	TSYM(void (*)(struct wl_listener*, void*), destroykeyboardgroup)(&kb_group->destroy, NULL);

	/* If it's not destroyed manually it will cause a use-after-free of wlr_seat.
	 * Destroy it until it's fixed in the wlroots side */
	wlr_backend_destroy(backend);

	wl_display_destroy(dpy);
	/* Destroy after the wayland display (when the monitors are already destroyed)
	   to avoid destroying them with an invalid scene output. */
	wlr_scene_node_destroy(&scene->tree.node);
}

#ifdef HOT

void
cleanupmon(struct wl_listener *listener, void *data)
{
	Monitor *m = wl_container_of(listener, m, destroy);
	LayerSurface *l, *tmp;
	size_t i;

	/* m->layers[i] are intentionally not unlinked */
	for (i = 0; i < LENGTH(m->layers); i++) {
		wl_list_for_each_safe(l, tmp, &m->layers[i], link)
			wlr_layer_surface_v1_destroy(l->layer_surface);
	}

	UNLISTEN(&m->destroy);
	UNLISTEN(&m->frame);
	wl_list_remove(&m->link);
	UNLISTEN(&m->request_state);
	m->wlr_output->data = NULL;
	wlr_output_layout_remove(output_layout, m->wlr_output);
	wlr_scene_output_destroy(m->scene_output);

	destroy_tree_layout(m);
	free(m->tree_layout);
	m->tree_layout = NULL;
	closemon(m);
	wlr_scene_node_destroy(&m->fullscreen_bg->node);
	free(m);
}

void
closemon(Monitor *m)
{
	/* update selmon if needed and
	 * move closed monitor's clients to the focused one */
	Client *c;
	int i = 0, nmons = wl_list_length(&mons);
	if (!nmons) {
		selmon = NULL;
	} else if (m == selmon) {
		do /* don't switch to disabled mons */
			selmon = wl_container_of(mons.next, selmon, link);
		while (!selmon->wlr_output->enabled && i++ < nmons);

		if (!selmon->wlr_output->enabled)
			selmon = NULL;
	}

	wl_list_for_each(c, &clients, link) {
		if (c->isfloating && c->geom.x > m->m.width)
			resize(c, (struct wlr_box){.x = c->geom.x - m->w.width, .y = c->geom.y,
					.width = c->geom.width, .height = c->geom.height}, 0);
		if (c->mon == m)
			setmon(c, selmon, c->tags);
	}
	focusclient(focustop(selmon), 1);
	printstatus();
}

void
commitlayersurfacenotify(struct wl_listener *listener, void *data)
{
	LayerSurface *l = wl_container_of(listener, l, surface_commit);
	struct wlr_layer_surface_v1 *layer_surface = l->layer_surface;
	struct wlr_scene_tree *scene_layer = layers[layermap[layer_surface->current.layer]];
	struct wlr_layer_surface_v1_state old_state;

	if (l->layer_surface->initial_commit) {
		wlr_fractional_scale_v1_notify_scale(layer_surface->surface, l->mon->wlr_output->scale);
		wlr_surface_set_preferred_buffer_scale(layer_surface->surface, (int32_t)ceilf(l->mon->wlr_output->scale));

		/* Temporarily set the layer's current state to pending
		 * so that we can easily arrange it */
		old_state = l->layer_surface->current;
		l->layer_surface->current = l->layer_surface->pending;
		arrangelayers(l->mon);
		l->layer_surface->current = old_state;
		return;
	}

	if (layer_surface->current.committed == 0 && l->mapped == layer_surface->surface->mapped)
		return;
	l->mapped = layer_surface->surface->mapped;

	if (scene_layer != l->scene->node.parent) {
		wlr_scene_node_reparent(&l->scene->node, scene_layer);
		wl_list_remove(&l->link);
		wl_list_insert(&l->mon->layers[layer_surface->current.layer], &l->link);
		wlr_scene_node_reparent(&l->popups->node, (layer_surface->current.layer
				< ZWLR_LAYER_SHELL_V1_LAYER_TOP ? layers[LyrTop] : scene_layer));
	}

	arrangelayers(l->mon);
}

void
commitnotify(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, commit);

	if (c->surface.xdg->initial_commit) {
		/*
		 * Get the monitor this client will be rendered on
		 * Note that if the user set a rule in which the client is placed on
		 * a different monitor based on its title this will likely select
		 * a wrong monitor.
		 */
		applyrules(c);
		if (c->mon) {
			wlr_surface_set_preferred_buffer_scale(client_surface(c), (int)ceilf(c->mon->wlr_output->scale));
			wlr_fractional_scale_v1_notify_scale(client_surface(c), c->mon->wlr_output->scale);
		}
		setmon(c, NULL, 0); /* Make sure to reapply rules in mapnotify() */

		wlr_xdg_toplevel_set_wm_capabilities(c->surface.xdg->toplevel, WLR_XDG_TOPLEVEL_WM_CAPABILITIES_FULLSCREEN);
		wlr_xdg_toplevel_set_size(c->surface.xdg->toplevel, 0, 0);
		if (c->decoration)
			requestdecorationmode(&c->set_decoration_mode, c->decoration);
		return;
	}

	if (client_surface(c)->mapped && c->mon)
		resize(c, c->geom, (c->isfloating && !c->isfullscreen));

	/* mark a pending resize as completed */
	if (c->resize && c->resize <= c->surface.xdg->current.configure_serial)
		c->resize = 0;
}

void
commitpopup(struct wl_listener *listener, void *data)
{
	struct wlr_surface *surface = data;
	struct wlr_xdg_popup *popup = wlr_xdg_popup_try_from_wlr_surface(surface);
	LayerSurface *l = NULL;
	Client *c = NULL;
	struct wlr_box box;
	int type = -1;

	if (!popup->base->initial_commit)
		return;

	type = toplevel_from_wlr_surface(popup->base->surface, &c, &l);
	if (!popup->parent || type < 0)
		return;
	popup->base->surface->data = wlr_scene_xdg_surface_create(
			popup->parent->data, popup->base);
	if ((l && !l->mon) || (c && !c->mon))
		return;
	box = type == LayerShell ? l->mon->m : c->mon->w;
	box.x -= (type == LayerShell ? l->geom.x : c->geom.x);
	box.y -= (type == LayerShell ? l->geom.y : c->geom.y);
	wlr_xdg_popup_unconstrain_from_box(popup, &box);
	UNLISTEN(listener);
}

void
createdecoration(struct wl_listener *listener, void *data)
{
	struct wlr_xdg_toplevel_decoration_v1 *deco = data;
	Client *c = deco->toplevel->base->data;
	c->decoration = deco;

	LISTEN(&deco->events.request_mode, &c->set_decoration_mode, requestdecorationmode);
	LISTEN(&deco->events.destroy, &c->destroy_decoration, destroydecoration);

	requestdecorationmode(&c->set_decoration_mode, deco);
}

void
createidleinhibitor(struct wl_listener *listener, void *data)
{
	struct wlr_idle_inhibitor_v1 *idle_inhibitor = data;
	LISTEN_STATIC(&idle_inhibitor->events.destroy, destroyidleinhibitor);

	checkidleinhibitor(NULL);
}

void
createkeyboard(struct wlr_keyboard *keyboard)
{
	/* Set the keymap to match the group keymap */
	wlr_keyboard_set_keymap(keyboard, kb_group->wlr_group->keyboard.keymap);

	/* Add the new keyboard to the group */
	wlr_keyboard_group_add_keyboard(kb_group->wlr_group, keyboard);
}

KeyboardGroup *
createkeyboardgroup(void)
{
	KeyboardGroup *group = ecalloc(1, sizeof(*group));
	struct xkb_context *context;
	struct xkb_keymap *keymap;

	group->wlr_group = wlr_keyboard_group_create();
	group->wlr_group->data = group;

	/* Prepare an XKB keymap and assign it to the keyboard group. */
	context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
	if (!(keymap = xkb_keymap_new_from_names(context, &xkb_rules,
				XKB_KEYMAP_COMPILE_NO_FLAGS)))
		die("failed to compile keymap");

	wlr_keyboard_set_keymap(&group->wlr_group->keyboard, keymap);
	xkb_keymap_unref(keymap);
	xkb_context_unref(context);

	wlr_keyboard_set_repeat_info(&group->wlr_group->keyboard, repeat_rate, repeat_delay);

	/* Set up listeners for keyboard events */
	LISTEN(&group->wlr_group->keyboard.events.key, &group->key, keypress);
	LISTEN(&group->wlr_group->keyboard.events.modifiers, &group->modifiers, keypressmod);

	group->key_repeat_source = wl_event_loop_add_timer(event_loop, keyrepeat, group);

	/* A seat can only have one keyboard, but this is a limitation of the
	 * Wayland protocol - not wlroots. We assign all connected keyboards to the
	 * same wlr_keyboard_group, which provides a single wlr_keyboard interface for
	 * all of them. Set this combined wlr_keyboard as the seat keyboard.
	 */
	wlr_seat_set_keyboard(seat, &group->wlr_group->keyboard);
	return group;
}

void
createlayersurface(struct wl_listener *listener, void *data)
{
	struct wlr_layer_surface_v1 *layer_surface = data;
	LayerSurface *l;
	struct wlr_surface *surface = layer_surface->surface;
	struct wlr_scene_tree *scene_layer = layers[layermap[layer_surface->pending.layer]];

	if (!layer_surface->output
			&& !(layer_surface->output = selmon ? selmon->wlr_output : NULL)) {
		wlr_layer_surface_v1_destroy(layer_surface);
		return;
	}

	l = layer_surface->data = ecalloc(1, sizeof(*l));
	l->type = LayerShell;
	LISTEN(&surface->events.commit, &l->surface_commit, commitlayersurfacenotify);
	LISTEN(&surface->events.unmap, &l->unmap, unmaplayersurfacenotify);
	LISTEN(&layer_surface->events.destroy, &l->destroy, destroylayersurfacenotify);

	l->layer_surface = layer_surface;
	l->mon = layer_surface->output->data;
	l->scene_layer = wlr_scene_layer_surface_v1_create(scene_layer, layer_surface);
	l->scene = l->scene_layer->tree;
	l->popups = surface->data = wlr_scene_tree_create(layer_surface->current.layer
			< ZWLR_LAYER_SHELL_V1_LAYER_TOP ? layers[LyrTop] : scene_layer);
	l->scene->node.data = l->popups->node.data = l;

	wl_list_insert(&l->mon->layers[layer_surface->pending.layer],&l->link);
	wlr_surface_send_enter(surface, layer_surface->output);
}

void
createlocksurface(struct wl_listener *listener, void *data)
{
	SessionLock *lock = wl_container_of(listener, lock, new_surface);
	struct wlr_session_lock_surface_v1 *lock_surface = data;
	Monitor *m = lock_surface->output->data;
	struct wlr_scene_tree *scene_tree = lock_surface->surface->data
			= wlr_scene_subsurface_tree_create(lock->scene, lock_surface->surface);
	m->lock_surface = lock_surface;

	wlr_scene_node_set_position(&scene_tree->node, m->m.x, m->m.y);
	wlr_session_lock_surface_v1_configure(lock_surface, m->m.width, m->m.height);

	LISTEN(&lock_surface->events.destroy, &m->destroy_lock_surface, destroylocksurface);

	if (m == selmon)
		client_notify_enter(lock_surface->surface, wlr_seat_get_keyboard(seat));
}

void
createmon(struct wl_listener *listener, void *data)
{
	/* This event is raised by the backend when a new output (aka a display or
	 * monitor) becomes available. */
	struct wlr_output *wlr_output = data;
	const MonitorRule *r;
	size_t i;
	struct wlr_output_state state;
	Monitor *m;

	if (!wlr_output_init_render(wlr_output, alloc, drw))
		return;

	m = wlr_output->data = ecalloc(1, sizeof(*m));
	m->wlr_output = wlr_output;

	for (i = 0; i < LENGTH(m->layers); i++)
		wl_list_init(&m->layers[i]);

	wlr_output_state_init(&state);
	/* Initialize monitor state using configured rules */
	m->tagset[0] = m->tagset[1] = 1;
	for (r = monrules; r < END(monrules); r++) {
		if (!r->name || strstr(wlr_output->name, r->name)) {
			m->m.x = r->x;
			m->m.y = r->y;
			m->mfact = r->mfact;
			m->nmaster = r->nmaster;
			m->lt[0] = r->lt;
			m->lt[1] = &layouts[LENGTH(layouts) > 1 && r->lt != &layouts[1]];
			strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, LENGTH(m->ltsymbol));
			wlr_output_state_set_scale(&state, r->scale);
			wlr_output_state_set_transform(&state, r->rr);
			break;
		}
	}

	/* The mode is a tuple of (width, height, refresh rate), and each
	 * monitor supports only a specific set of modes. We just pick the
	 * monitor's preferred mode; a more sophisticated compositor would let
	 * the user configure it. */
	wlr_output_state_set_mode(&state, wlr_output_preferred_mode(wlr_output));

	/* Set up event listeners */
	LISTEN(&wlr_output->events.frame, &m->frame, rendermon);
	LISTEN(&wlr_output->events.destroy, &m->destroy, cleanupmon);
	LISTEN(&wlr_output->events.request_state, &m->request_state, requestmonstate);

	wlr_output_state_set_enabled(&state, 1);
	wlr_output_commit_state(wlr_output, &state);
	wlr_output_state_finish(&state);

	wl_list_insert(&mons, &m->link);
	printstatus();
	init_tree_layout(m);

	/* The xdg-protocol specifies:
	 *
	 * If the fullscreened surface is not opaque, the compositor must make
	 * sure that other screen content not part of the same surface tree (made
	 * up of subsurfaces, popups or similarly coupled surfaces) are not
	 * visible below the fullscreened surface.
	 *
	 */
	/* updatemons() will resize and set correct position */
	m->fullscreen_bg = wlr_scene_rect_create(layers[LyrFS], 0, 0, fullscreen_bg);
	wlr_scene_node_set_enabled(&m->fullscreen_bg->node, 0);

	/* Adds this to the output layout in the order it was configured.
	 *
	 * The output layout utility automatically adds a wl_output global to the
	 * display, which Wayland clients can see to find out information about the
	 * output (such as DPI, scale factor, manufacturer, etc).
	 */
	m->scene_output = wlr_scene_output_create(scene, wlr_output);
	if (m->m.x == -1 && m->m.y == -1)
		wlr_output_layout_add_auto(output_layout, wlr_output);
	else
		wlr_output_layout_add(output_layout, wlr_output, m->m.x, m->m.y);
}

void
createnotify(struct wl_listener *listener, void *data)
{
	/* This event is raised when a client creates a new toplevel (application window). */
	struct wlr_xdg_toplevel *toplevel = data;
	Client *c = NULL;

	/* Allocate a Client for this surface */
	c = toplevel->base->data = ecalloc(1, sizeof(*c));
	c->surface.xdg = toplevel->base;
	c->bw = borderpx;

	LISTEN(&toplevel->base->surface->events.commit, &c->commit, commitnotify);
	LISTEN(&toplevel->base->surface->events.map, &c->map, mapnotify);
	LISTEN(&toplevel->base->surface->events.unmap, &c->unmap, unmapnotify);
	LISTEN(&toplevel->events.destroy, &c->destroy, destroynotify);
	LISTEN(&toplevel->events.request_fullscreen, &c->fullscreen, fullscreennotify);
	LISTEN(&toplevel->events.request_maximize, &c->maximize, maximizenotify);
	LISTEN(&toplevel->events.set_title, &c->set_title, updatetitle);
}

void
createpointer(struct wlr_pointer *pointer)
{
	struct libinput_device *device;
	if (wlr_input_device_is_libinput(&pointer->base)
			&& (device = wlr_libinput_get_device_handle(&pointer->base))) {

		if (libinput_device_config_tap_get_finger_count(device)) {
			libinput_device_config_tap_set_enabled(device, tap_to_click);
			libinput_device_config_tap_set_drag_enabled(device, tap_and_drag);
			libinput_device_config_tap_set_drag_lock_enabled(device, drag_lock);
			libinput_device_config_tap_set_button_map(device, button_map);
		}

		if (libinput_device_config_scroll_has_natural_scroll(device))
			libinput_device_config_scroll_set_natural_scroll_enabled(device, natural_scrolling);

		if (libinput_device_config_dwt_is_available(device))
			libinput_device_config_dwt_set_enabled(device, disable_while_typing);

		if (libinput_device_config_left_handed_is_available(device))
			libinput_device_config_left_handed_set(device, left_handed);

		if (libinput_device_config_middle_emulation_is_available(device))
			libinput_device_config_middle_emulation_set_enabled(device, middle_button_emulation);

		if (libinput_device_config_scroll_get_methods(device) != LIBINPUT_CONFIG_SCROLL_NO_SCROLL)
			libinput_device_config_scroll_set_method (device, scroll_method);

		if (libinput_device_config_click_get_methods(device) != LIBINPUT_CONFIG_CLICK_METHOD_NONE)
			libinput_device_config_click_set_method (device, click_method);

		if (libinput_device_config_send_events_get_modes(device))
			libinput_device_config_send_events_set_mode(device, send_events_mode);

		if (libinput_device_config_accel_is_available(device)) {
			libinput_device_config_accel_set_profile(device, accel_profile);
			libinput_device_config_accel_set_speed(device, accel_speed);
		}
	}

	wlr_cursor_attach_input_device(cursor, &pointer->base);
}

void
createpointerconstraint(struct wl_listener *listener, void *data)
{
	PointerConstraint *pointer_constraint = ecalloc(1, sizeof(*pointer_constraint));
	pointer_constraint->constraint = data;
	LISTEN(&pointer_constraint->constraint->events.destroy,
			&pointer_constraint->destroy, destroypointerconstraint);
}

void
createpopup(struct wl_listener *listener, void *data)
{
	/* This event is raised when a client (either xdg-shell or layer-shell)
	 * creates a new popup. */
	struct wlr_xdg_popup *popup = data;
	LISTEN_STATIC(&popup->base->surface->events.commit, commitpopup);
}

void
cursorconstrain(struct wlr_pointer_constraint_v1 *constraint)
{
	if (active_constraint == constraint)
		return;

	if (active_constraint)
		wlr_pointer_constraint_v1_send_deactivated(active_constraint);

	active_constraint = constraint;
	wlr_pointer_constraint_v1_send_activated(constraint);
}

void
cursorframe(struct wl_listener *listener, void *data)
{
	/* This event is forwarded by the cursor when a pointer emits an frame
	 * event. Frame events are sent after regular pointer events to group
	 * multiple events together. For instance, two axis events may happen at the
	 * same time, in which case a frame event won't be sent in between. */
	/* Notify the client with pointer focus of the frame event. */
	wlr_seat_pointer_notify_frame(seat);
}

void
cursorwarptohint(void)
{
	Client *c = NULL;
	double sx = active_constraint->current.cursor_hint.x;
	double sy = active_constraint->current.cursor_hint.y;

	toplevel_from_wlr_surface(active_constraint->surface, &c, NULL);
	if (c && active_constraint->current.cursor_hint.enabled) {
		wlr_cursor_warp(cursor, NULL, sx + c->geom.x + c->bw, sy + c->geom.y + c->bw);
		wlr_seat_pointer_warp(active_constraint->seat, sx, sy);
	}
}

void
destroydecoration(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, destroy_decoration);
	c->decoration = NULL;

	UNLISTEN(&c->destroy_decoration);
	UNLISTEN(&c->set_decoration_mode);
}

void
destroydragicon(struct wl_listener *listener, void *data)
{
	/* Focus enter isn't sent during drag, so refocus the focused node. */
	focusclient(focustop(selmon), 1);
	motionnotify(0, NULL, 0, 0, 0, 0);
}

void
destroyidleinhibitor(struct wl_listener *listener, void *data)
{
	/* `data` is the wlr_surface of the idle inhibitor being destroyed,
	 * at this point the idle inhibitor is still in the list of the manager */
	checkidleinhibitor(wlr_surface_get_root_surface(data));
}

void
destroylayersurfacenotify(struct wl_listener *listener, void *data)
{
	LayerSurface *l = wl_container_of(listener, l, destroy);

	wl_list_remove(&l->link);
	UNLISTEN(&l->destroy);
	UNLISTEN(&l->unmap);
	UNLISTEN(&l->surface_commit);
	wlr_scene_node_destroy(&l->scene->node);
	wlr_scene_node_destroy(&l->popups->node);
	free(l);
}

void
destroylock(SessionLock *lock, int unlock)
{
	wlr_seat_keyboard_notify_clear_focus(seat);
	if ((locked = !unlock))
		goto destroy;

	wlr_scene_node_set_enabled(&locked_bg->node, 0);

	focusclient(focustop(selmon), 0);
	motionnotify(0, NULL, 0, 0, 0, 0);

destroy:
	UNLISTEN(&lock->new_surface);
	UNLISTEN(&lock->unlock);
	UNLISTEN(&lock->destroy);

	wlr_scene_node_destroy(&lock->scene->node);
	cur_lock = NULL;
	free(lock);
}

void
destroylocksurface(struct wl_listener *listener, void *data)
{
	Monitor *m = wl_container_of(listener, m, destroy_lock_surface);
	struct wlr_session_lock_surface_v1 *surface, *lock_surface = m->lock_surface;

	m->lock_surface = NULL;
	UNLISTEN(&m->destroy_lock_surface);

	if (lock_surface->surface != seat->keyboard_state.focused_surface)
		return;

	if (locked && cur_lock && !wl_list_empty(&cur_lock->surfaces)) {
		surface = wl_container_of(cur_lock->surfaces.next, surface, link);
		client_notify_enter(surface->surface, wlr_seat_get_keyboard(seat));
	} else if (!locked) {
		focusclient(focustop(selmon), 1);
	} else {
		wlr_seat_keyboard_clear_focus(seat);
	}
}

void
destroynotify(struct wl_listener *listener, void *data)
{
	/* Called when the xdg_toplevel is destroyed. */
	Client *c = wl_container_of(listener, c, destroy);
	UNLISTEN(&c->destroy);
	UNLISTEN(&c->set_title);
	UNLISTEN(&c->fullscreen);
	/* We check if the destroyed client was part of any tiled_list, to catch
	 * client removals even if they would not be currently managed by btrtile */
	if (selmon && selmon->tree_layout) {
		for (int i = 0; i < TAGCOUNT; i++) {
			remove_client(selmon, c,
		 &selmon->tree_layout->root[i],
		 &selmon->tree_layout->tiled_clients[i]);
		}
	}
#ifdef XWAYLAND
	if (c->type != XDGShell) {
		UNLISTEN(&c->activate);
		UNLISTEN(&c->associate);
		UNLISTEN(&c->configure);
		UNLISTEN(&c->dissociate);
		UNLISTEN(&c->set_hints);
	} else
#endif
	{
		UNLISTEN(&c->commit);
		UNLISTEN(&c->map);
		UNLISTEN(&c->unmap);
	}
	free(c);
}

void
destroypointerconstraint(struct wl_listener *listener, void *data)
{
	PointerConstraint *pointer_constraint = wl_container_of(listener, pointer_constraint, destroy);

	if (active_constraint == pointer_constraint->constraint) {
		cursorwarptohint();
		active_constraint = NULL;
	}

	UNLISTEN(&pointer_constraint->destroy);
	free(pointer_constraint);
}

void
destroysessionlock(struct wl_listener *listener, void *data)
{
	SessionLock *lock = wl_container_of(listener, lock, destroy);
	destroylock(lock, 0);
}

void
destroysessionmgr(struct wl_listener *listener, void *data)
{
	UNLISTEN(&lock_listener);
	UNLISTEN(listener);
}

void
destroykeyboardgroup(struct wl_listener *listener, void *data)
{
	KeyboardGroup *group = wl_container_of(listener, group, destroy);
	wl_event_source_remove(group->key_repeat_source);
	UNLISTEN(&group->key);
	UNLISTEN(&group->modifiers);
	UNLISTEN(&group->destroy);
	wlr_keyboard_group_destroy(group->wlr_group);
	free(group);
}

Monitor *
dirtomon(enum wlr_direction dir)
{
	struct wlr_output *next;
	if (!wlr_output_layout_get(output_layout, selmon->wlr_output))
		return selmon;
	if ((next = wlr_output_layout_adjacent_output(output_layout,
			dir, selmon->wlr_output, selmon->m.x, selmon->m.y)))
		return next->data;
	if ((next = wlr_output_layout_farthest_output(output_layout,
			dir ^ (WLR_DIRECTION_LEFT|WLR_DIRECTION_RIGHT),
			selmon->wlr_output, selmon->m.x, selmon->m.y)))
		return next->data;
	return selmon;
}

void
focusclient(Client *c, int lift)
{
	struct wlr_surface *old = seat->keyboard_state.focused_surface;
	int unused_lx, unused_ly, old_client_type;
	Client *old_c = NULL;
	LayerSurface *old_l = NULL;

	if (locked)
		return;

	/* Raise client in stacking order if requested */
	if (c && lift)
		wlr_scene_node_raise_to_top(&c->scene->node);

	if (c && client_surface(c) == old)
		return;

	if ((old_client_type = toplevel_from_wlr_surface(old, &old_c, &old_l)) == XDGShell) {
		struct wlr_xdg_popup *popup, *tmp;
		wl_list_for_each_safe(popup, tmp, &old_c->surface.xdg->popups, link)
			wlr_xdg_popup_destroy(popup);
	}

	/* Put the new client atop the focus stack and select its monitor */
	if (c && !client_is_unmanaged(c)) {
		wl_list_remove(&c->flink);
		wl_list_insert(&fstack, &c->flink);
		selmon = c->mon;
		c->isurgent = 0;
		client_restack_surface(c);

		/* Don't change border color if there is an exclusive focus or we are
		 * handling a drag operation */
		if (!exclusive_focus && !seat->drag)
			client_set_border_color(c, focuscolor);
	}

	/* Deactivate old client if focus is changing */
	if (old && (!c || client_surface(c) != old)) {
		/* If an overlay is focused, don't focus or activate the client,
		 * but only update its position in fstack to render its border with focuscolor
		 * and focus it after the overlay is closed. */
		if (old_client_type == LayerShell && wlr_scene_node_coords(
					&old_l->scene->node, &unused_lx, &unused_ly)
				&& old_l->layer_surface->current.layer >= ZWLR_LAYER_SHELL_V1_LAYER_TOP) {
			return;
		} else if (old_c && old_c == exclusive_focus && client_wants_focus(old_c)) {
			return;
		/* Don't deactivate old client if the new one wants focus, as this causes issues with winecfg
		 * and probably other clients */
		} else if (old_c && !client_is_unmanaged(old_c) && (!c || !client_wants_focus(c))) {
			client_set_border_color(old_c, bordercolor);

			client_activate_surface(old, 0);
		}
	}
	printstatus();

	if (!c) {
		/* With no client, all we have left is to clear focus */
		wlr_seat_keyboard_notify_clear_focus(seat);
		return;
	}

	/* Change cursor surface */
	motionnotify(0, NULL, 0, 0, 0, 0);

	/* Have a client, so focus its top-level wlr_surface */
	client_notify_enter(client_surface(c), wlr_seat_get_keyboard(seat));

	/* Activate the new client */
	client_activate_surface(client_surface(c), 1);
}

void
focusmon(const Arg *arg)
{
	int i = 0, nmons = wl_list_length(&mons);
	if (nmons) {
		do /* don't switch to disabled mons */
			selmon = dirtomon(arg->i);
		while (!selmon->wlr_output->enabled && i++ < nmons);
	}
	focusclient(focustop(selmon), 1);
}

void
focusortogglescratch(const Arg *arg)
{
	Client *c;
    const char next = ((char**)arg->v)[0][0];
    unsigned int off = next == current_scratch;

    if (((c = focustop(selmon)) && c->scratchkey == next) || current_scratch != next)
    {
            togglescratch(arg);
            focusclient(NULL, 0);
    }

    if (current_scratch == 0)
        return;

	wl_list_for_each(c, &clients, link)
    	if (c->scratchkey == current_scratch) {
            focusclient(c, 0);
            return;
    	}

    if (off) current_scratch = 0;
}

void
togglescratch(const Arg *arg)
{
	Client *c;
    const char next = ((char**)arg->v)[0][0];
	unsigned int found = 0;

    current_scratch = current_scratch == next ? 0 : next;

	wl_list_for_each(c, &clients, link) {
        if (c->scratchkey == current_scratch) {
            found = 1;
            c->tags = selmon ->tagset[selmon->seltags];
        }
        if (c->scratchkey == next && current_scratch == 0)
        {
            c->tags = 0;
        }
	}

    if (!found && current_scratch)
        spawnscratch(arg);
    else
        arrange(selmon);
}

void
focusstack(const Arg *arg)
{
	/* Focus the next or previous client (in tiling order) on selmon */
	Client *c, *sel = focustop(selmon);
	if (!sel || (sel->isfullscreen && !client_has_children(sel)))
		return;
	if (arg->i > 0) {
		wl_list_for_each(c, &sel->link, link) {
			if (&c->link == &clients)
				continue; /* wrap past the sentinel node */
			if (VISIBLEON(c, selmon))
				break; /* found it */
		}
	} else {
		wl_list_for_each_reverse(c, &sel->link, link) {
			if (&c->link == &clients)
				continue; /* wrap past the sentinel node */
			if (VISIBLEON(c, selmon))
				break; /* found it */
		}
	}
	/* If only one client is visible on selmon, then c == sel */
	focusclient(c, 1);
}

/* We probably should change the name of this, it sounds like
 * will focus the topmost client of this mon, when actually will
 * only return that client */
Client *
focustop(Monitor *m)
{
	Client *c;
	wl_list_for_each(c, &fstack, flink) {
		if (VISIBLEON(c, m))
			return c;
	}
	return NULL;
}

void
fullscreennotify(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, fullscreen);
	setfullscreen(c, client_wants_fullscreen(c));
}

void
gpureset(struct wl_listener *listener, void *data)
{
	struct wlr_renderer *old_drw = drw;
	struct wlr_allocator *old_alloc = alloc;
	struct Monitor *m;
	if (!(drw = wlr_renderer_autocreate(backend)))
		die("couldn't recreate renderer");

	if (!(alloc = wlr_allocator_autocreate(backend, drw)))
		die("couldn't recreate allocator");

	LISTEN_STATIC(&drw->events.lost, gpureset);

	wlr_compositor_set_renderer(compositor, drw);

	wl_list_for_each(m, &mons, link) {
		wlr_output_init_render(m->wlr_output, alloc, drw);
	}

	wlr_allocator_destroy(old_alloc);
	wlr_renderer_destroy(old_drw);
}

void
handlesig(int signo)
{
	if (signo == SIGCHLD) {
		siginfo_t in;
		/* wlroots expects to reap the XWayland process itself, so we
		 * use WNOWAIT to keep the child waitable until we know it's not
		 * XWayland.
		 */
		while (!waitid(P_ALL, 0, &in, WEXITED|WNOHANG|WNOWAIT) && in.si_pid
#ifdef XWAYLAND
			   && (!xwayland || in.si_pid != xwayland->server->pid)
#endif
			   ) {
			pid_t *p, *lim;
			waitpid(in.si_pid, NULL, 0);
			if (in.si_pid == child_pid)
				child_pid = -1;
			if (!(p = autostart_pids))
				continue;
			lim = &p[autostart_len];

			for (; p < lim; p++) {
				if (*p == in.si_pid) {
					*p = -1;
					break;
				}
			}
		}
	} else if (signo == SIGINT || signo == SIGTERM) {
		quit(NULL);
	}
}

pid_t
getparentprocess(pid_t p)
{
	unsigned int v = 0;

	FILE *f;
	char buf[256];
	snprintf(buf, sizeof(buf) - 1, "/proc/%u/stat", (unsigned)p);

	if (!(f = fopen(buf, "r")))
		return 0;

	fscanf(f, "%*u %*s %*c %u", &v);
	fclose(f);

	return (pid_t)v;
}

int
isdescprocess(pid_t p, pid_t c)
{
	while (p != c && c != 0)
		c = getparentprocess(c);

	return (int)c;
}

Client *
termforwin(Client *w)
{
	Client *c;

	if (!w->pid || w->isterm || w->noswallow)
		return NULL;

	wl_list_for_each(c, &fstack, flink)
		if (c->isterm && !c->swallowing && c->pid && isdescprocess(c->pid, w->pid))
			return c;

	return NULL;
}

void
swallow(Client *c, Client *w)
{
	c->bw = w->bw;
	c->isfloating = w->isfloating;
	c->isurgent = w->isurgent;
	c->isfullscreen = w->isfullscreen;
	c->tags = w->tags;
	c->geom = w->geom;
	wl_list_insert(&w->link, &c->link);
	wl_list_insert(&w->flink, &c->flink);
	wlr_scene_node_set_enabled(&w->scene->node, 0);
	wlr_scene_node_set_enabled(&c->scene->node, 1);
}

void
incnmaster(const Arg *arg)
{
	if (!arg || !selmon)
		return;
	selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
	arrange(selmon);
}

void
inputdevice(struct wl_listener *listener, void *data)
{
	/* This event is raised by the backend when a new input device becomes
	 * available. */
	struct wlr_input_device *device = data;
	uint32_t caps;

	switch (device->type) {
	case WLR_INPUT_DEVICE_KEYBOARD:
		createkeyboard(wlr_keyboard_from_input_device(device));
		break;
	case WLR_INPUT_DEVICE_POINTER:
		createpointer(wlr_pointer_from_input_device(device));
		break;
	default:
		/* TODO handle other input device types */
		break;
	}

	/* We need to let the wlr_seat know what our capabilities are, which is
	 * communiciated to the client. In dwl we always have a cursor, even if
	 * there are no pointer devices, so we always include that capability. */
	/* TODO do we actually require a cursor? */
	caps = WL_SEAT_CAPABILITY_POINTER;
	if (!wl_list_empty(&kb_group->wlr_group->devices))
		caps |= WL_SEAT_CAPABILITY_KEYBOARD;
	wlr_seat_set_capabilities(seat, caps);
}

int
keybinding(uint32_t mods, xkb_keysym_t sym)
{
	/*
	 * Here we handle compositor keybindings. This is when the compositor is
	 * processing keys, rather than passing them on to the client for its own
	 * processing.
	 */
	const Key *k;
	for (k = keys; k < END(keys); k++) {
		if (CLEANMASK(mods) == CLEANMASK(k->mod)
				&& sym == k->keysym && k->func) {
			k->func(&k->arg);
			return 1;
		}
	}
	return 0;
}

void
keypress(struct wl_listener *listener, void *data)
{
	int i;
	/* This event is raised when a key is pressed or released. */
	KeyboardGroup *group = wl_container_of(listener, group, key);
	struct wlr_keyboard_key_event *event = data;

	/* Translate libinput keycode -> xkbcommon */
	uint32_t keycode = event->keycode + 8;
	/* Get a list of keysyms based on the keymap for this keyboard */
	const xkb_keysym_t *syms;
	int nsyms = xkb_state_key_get_syms(
			group->wlr_group->keyboard.xkb_state, keycode, &syms);

	int handled = 0;
	uint32_t mods = wlr_keyboard_get_modifiers(&group->wlr_group->keyboard);

	wlr_idle_notifier_v1_notify_activity(idle_notifier, seat);

	/* On _press_ if there is no active screen locker,
	 * attempt to process a compositor keybinding. */
	if (!locked && event->state == WL_KEYBOARD_KEY_STATE_PRESSED) {
		for (i = 0; i < nsyms; i++)
			handled = keybinding(mods, syms[i]) || handled;
	}

	if (handled && group->wlr_group->keyboard.repeat_info.delay > 0) {
		group->mods = mods;
		group->keysyms = syms;
		group->nsyms = nsyms;
		wl_event_source_timer_update(group->key_repeat_source,
				group->wlr_group->keyboard.repeat_info.delay);
	} else {
		group->nsyms = 0;
		wl_event_source_timer_update(group->key_repeat_source, 0);
	}

	if (handled)
		return;

	wlr_seat_set_keyboard(seat, &group->wlr_group->keyboard);
	/* Pass unhandled keycodes along to the client. */
	wlr_seat_keyboard_notify_key(seat, event->time_msec,
			event->keycode, event->state);
}

void
keypressmod(struct wl_listener *listener, void *data)
{
	/* This event is raised when a modifier key, such as shift or alt, is
	 * pressed. We simply communicate this to the client. */
	KeyboardGroup *group = wl_container_of(listener, group, modifiers);

	wlr_seat_set_keyboard(seat, &group->wlr_group->keyboard);
	/* Send modifiers to the client. */
	wlr_seat_keyboard_notify_modifiers(seat,
			&group->wlr_group->keyboard.modifiers);
}

int
keyrepeat(void *data)
{
	KeyboardGroup *group = data;
	int i;
	if (!group->nsyms || group->wlr_group->keyboard.repeat_info.rate <= 0)
		return 0;

	wl_event_source_timer_update(group->key_repeat_source,
			1000 / group->wlr_group->keyboard.repeat_info.rate);

	for (i = 0; i < group->nsyms; i++)
		keybinding(group->mods, group->keysyms[i]);

	return 0;
}

void
killclient(const Arg *arg)
{
	Client *sel = focustop(selmon);
	if (sel)
		client_send_close(sel);
}

void
locksession(struct wl_listener *listener, void *data)
{
	struct wlr_session_lock_v1 *session_lock = data;
	SessionLock *lock;
	wlr_scene_node_set_enabled(&locked_bg->node, 1);
	if (cur_lock) {
		wlr_session_lock_v1_destroy(session_lock);
		return;
	}
	lock = session_lock->data = ecalloc(1, sizeof(*lock));
	focusclient(NULL, 0);

	lock->scene = wlr_scene_tree_create(layers[LyrBlock]);
	cur_lock = lock->lock = session_lock;
	locked = 1;

	LISTEN(&session_lock->events.new_surface, &lock->new_surface, createlocksurface);
	LISTEN(&session_lock->events.destroy, &lock->destroy, destroysessionlock);
	LISTEN(&session_lock->events.unlock, &lock->unlock, unlocksession);

	wlr_session_lock_v1_send_locked(session_lock);
}

void
mapnotify(struct wl_listener *listener, void *data)
{
	/* Called when the surface is mapped, or ready to display on-screen. */
	Client *p = NULL;
	Client *w, *c = wl_container_of(listener, c, map);
	Monitor *m;
	int i;

	/* Create scene tree for this client and its border */
	c->scene = client_surface(c)->data = wlr_scene_tree_create(layers[LyrTile]);
	wlr_scene_node_set_enabled(&c->scene->node, c->type != XDGShell);
	c->scene_surface = c->type == XDGShell
			? wlr_scene_xdg_surface_create(c->scene, c->surface.xdg)
			: wlr_scene_subsurface_tree_create(c->scene, client_surface(c));
	c->scene->node.data = c->scene_surface->node.data = c;

	client_get_geometry(c, &c->geom);

	/* Handle unmanaged clients first so we can return prior create borders */
	if (client_is_unmanaged(c)) {
		/* Unmanaged clients always are floating */
		wlr_scene_node_reparent(&c->scene->node, layers[LyrFloat]);
		wlr_scene_node_set_position(&c->scene->node, c->geom.x, c->geom.y);
		if (client_wants_focus(c)) {
			focusclient(c, 1);
			exclusive_focus = c;
		}
		goto unset_fullscreen;
	}

	for (i = 0; i < 4; i++) {
		c->border[i] = wlr_scene_rect_create(c->scene, 0, 0,
				c->isurgent ? urgentcolor : bordercolor);
		c->border[i]->node.data = c;
	}

	/* Initialize client geometry with room for border */
	client_set_tiled(c, WLR_EDGE_TOP | WLR_EDGE_BOTTOM | WLR_EDGE_LEFT | WLR_EDGE_RIGHT);
	c->geom.width += 2 * c->bw;
	c->geom.height += 2 * c->bw;

	/* Insert this client into client lists. */
	wl_list_insert(&clients, &c->link);
	wl_list_insert(&fstack, &c->flink);

	/* Set initial monitor, tags, floating status, and focus:
	 * we always consider floating, clients that have parent and thus
	 * we set the same tags and monitor than its parent, if not
	 * try to apply rules for them */
	if ((p = client_get_parent(c))) {
		c->isfloating = 1;
		setmon(c, p->mon, p->tags);
	} else {
		applyrules(c);
	}
	printstatus();

unset_fullscreen:
	m = c->mon ? c->mon : xytomon(c->geom.x, c->geom.y);
	wl_list_for_each(w, &clients, link) {
		if (w != c && w != p && w->isfullscreen && m == w->mon && (w->tags & c->tags))
			setfullscreen(w, 0);
	}
}

void
maximizenotify(struct wl_listener *listener, void *data)
{
	/* This event is raised when a client would like to maximize itself,
	 * typically because the user clicked on the maximize button on
	 * client-side decorations. dwl doesn't support maximization, but
	 * to conform to xdg-shell protocol we still must send a configure.
	 * Since xdg-shell protocol v5 we should ignore request of unsupported
	 * capabilities, just schedule a empty configure when the client uses <5
	 * protocol version
	 * wlr_xdg_surface_schedule_configure() is used to send an empty reply. */
	Client *c = wl_container_of(listener, c, maximize);
	if (c->surface.xdg->initialized
			&& wl_resource_get_version(c->surface.xdg->toplevel->resource)
					< XDG_TOPLEVEL_WM_CAPABILITIES_SINCE_VERSION)
		wlr_xdg_surface_schedule_configure(c->surface.xdg);
}

void
monocle(Monitor *m)
{
	Client *c;
	int n = 0;

	wl_list_for_each(c, &clients, link) {
		if (!VISIBLEON(c, m) || c->isfloating || c->isfullscreen)
			continue;
		resize(c, m->w, 0);
		n++;
	}
	if (n)
		snprintf(m->ltsymbol, LENGTH(m->ltsymbol), "[%d]", n);
	if ((c = focustop(m)))
		wlr_scene_node_raise_to_top(&c->scene->node);
}

void
motionabsolute(struct wl_listener *listener, void *data)
{
	/* This event is forwarded by the cursor when a pointer emits an _absolute_
	 * motion event, from 0..1 on each axis. This happens, for example, when
	 * wlroots is running under a Wayland window rather than KMS+DRM, and you
	 * move the mouse over the window. You could enter the window from any edge,
	 * so we have to warp the mouse there. There is also some hardware which
	 * emits these events. */
	struct wlr_pointer_motion_absolute_event *event = data;
	double lx, ly, dx, dy;

	if (!event->time_msec) /* this is 0 with virtual pointers */
		wlr_cursor_warp_absolute(cursor, &event->pointer->base, event->x, event->y);

	wlr_cursor_absolute_to_layout_coords(cursor, &event->pointer->base, event->x, event->y, &lx, &ly);
	dx = lx - cursor->x;
	dy = ly - cursor->y;
	motionnotify(event->time_msec, &event->pointer->base, dx, dy, dx, dy);
}

void
motionnotify(uint32_t time, struct wlr_input_device *device, double dx, double dy,
		double dx_unaccel, double dy_unaccel)
{
	int tiled = 0;
	double sx = 0, sy = 0, sx_confined, sy_confined, dx_total, dy_total;
	Client *c = NULL, *w = NULL;
	LayerSurface *l = NULL;
	struct wlr_surface *surface = NULL;
	struct wlr_pointer_constraint_v1 *constraint;

	/* Find the client under the pointer and send the event along. */
	xytonode(cursor->x, cursor->y, &surface, &c, NULL, &sx, &sy);

	if (cursor_mode == CurPressed && !seat->drag
			&& surface != seat->pointer_state.focused_surface
			&& toplevel_from_wlr_surface(seat->pointer_state.focused_surface, &w, &l) >= 0) {
		c = w;
		surface = seat->pointer_state.focused_surface;
		sx = cursor->x - (l ? l->geom.x : w->geom.x);
		sy = cursor->y - (l ? l->geom.y : w->geom.y);
	}

	/* time is 0 in internal calls meant to restore pointer focus. */
	if (time) {
		wlr_relative_pointer_manager_v1_send_relative_motion(
				relative_pointer_mgr, seat, (uint64_t)time * 1000,
				dx, dy, dx_unaccel, dy_unaccel);

		wl_list_for_each(constraint, &pointer_constraints->constraints, link)
			cursorconstrain(constraint);

		if (active_constraint && cursor_mode != CurResize && cursor_mode != CurMove) {
			toplevel_from_wlr_surface(active_constraint->surface, &c, NULL);
			if (c && active_constraint->surface == seat->pointer_state.focused_surface) {
				sx = cursor->x - c->geom.x - c->bw;
				sy = cursor->y - c->geom.y - c->bw;
				if (wlr_region_confine(&active_constraint->region, sx, sy,
						sx + dx, sy + dy, &sx_confined, &sy_confined)) {
					dx = sx_confined - sx;
					dy = sy_confined - sy;
				}

				if (active_constraint->type == WLR_POINTER_CONSTRAINT_V1_LOCKED)
					return;
			}
		}

		wlr_cursor_move(cursor, device, dx, dy);
		wlr_idle_notifier_v1_notify_activity(idle_notifier, seat);

		/* Update selmon (even while dragging a window) */
		if (sloppyfocus)
			selmon = xytomon(cursor->x, cursor->y);
	}

	/* Update drag icon's position */
	wlr_scene_node_set_position(&drag_icon->node, (int)round(cursor->x), (int)round(cursor->y));

	/* Skip if internal call or already resizing */
	if (time == 0 && resizing_from_mouse)
		goto focus;

	tiled = grabc && !grabc->isfloating && !grabc->isfullscreen;
	if (cursor_mode == CurMove) {
		/* Move the grabbed client to the new position. */
		if (grabc && grabc->isfloating) {
			resize(grabc, (struct wlr_box){
				.x = (int)round(cursor->x) - grabcx,
				.y = (int)round(cursor->y) - grabcy,
				.width = grabc->geom.width,
				.height = grabc->geom.height
			}, 1);
			return;
		}
	} else if (cursor_mode == CurResize) {
		if (tiled && resizing_from_mouse) {
			dx_total = cursor->x - resize_last_update_x;
			dy_total = cursor->y - resize_last_update_y;

			if (time - last_resize_time >= resize_interval_ms) {
				Arg a = {0};
				if (fabs(dx_total) > fabs(dy_total)) {
					a.f = (float)(dx_total * resize_factor);
					setratio_h(&a);
				} else {
					a.f = (float)(dy_total * resize_factor);
					setratio_v(&a);
				}
				arrange(selmon);

				last_resize_time = time;
				resize_last_update_x = cursor->x;
				resize_last_update_y = cursor->y;
			}

		} else if (grabc && grabc->isfloating) {
			/* Floating resize as original */
			resize(grabc, (struct wlr_box){
				.x = grabc->geom.x,
				.y = grabc->geom.y,
				.width = (int)round(cursor->x) - grabc->geom.x,
				.height = (int)round(cursor->y) - grabc->geom.y
			}, 1);
			return;
		}
	}

focus:
	/* If there's no client surface under the cursor, set the cursor image to a
	 * default. This is what makes the cursor image appear when you move it
	 * off of a client or over its border. */
	if (!surface && !seat->drag)
		wlr_cursor_set_xcursor(cursor, cursor_mgr, "default");

	pointerfocus(c, surface, sx, sy, time);
}

void
motionrelative(struct wl_listener *listener, void *data)
{
	/* This event is forwarded by the cursor when a pointer emits a _relative_
	 * pointer motion event (i.e. a delta) */
	struct wlr_pointer_motion_event *event = data;
	/* The cursor doesn't move unless we tell it to. The cursor automatically
	 * handles constraining the motion to the output layout, as well as any
	 * special configuration applied for the specific input device which
	 * generated the event. You can pass NULL for the device if you want to move
	 * the cursor around without any input. */
	motionnotify(event->time_msec, &event->pointer->base, event->delta_x, event->delta_y,
			event->unaccel_dx, event->unaccel_dy);
}

void
moveresize(const Arg *arg)
{
	if (cursor_mode != CurNormal && cursor_mode != CurPressed)
		return;
	xytonode(cursor->x, cursor->y, NULL, &grabc, NULL, NULL, NULL);
	if (!grabc || client_is_unmanaged(grabc) || grabc->isfullscreen)
		return;

	cursor_mode = arg->ui;
	grabc->was_tiled = (!grabc->isfloating && !grabc->isfullscreen);

	if (grabc->was_tiled) {
		switch (cursor_mode) {
			case CurMove:
				setfloating(grabc, 1);
				grabcx = (int)round(cursor->x) - grabc->geom.x;
				grabcy = (int)round(cursor->y) - grabc->geom.y;
				wlr_cursor_set_xcursor(cursor, cursor_mgr, "fleur");
				break;
			case CurResize:
				wlr_cursor_set_xcursor(cursor, cursor_mgr, "se-resize");
				resize_last_update_x = cursor->x;
				resize_last_update_y = cursor->y;
				resizing_from_mouse = 1;
				break;
		}
	} else {
		/* Default floating logic */
		/* Float the window and tell motionnotify to grab it */
		setfloating(grabc, 1);
		switch (cursor_mode) {
			case CurMove:
				grabcx = (int)round(cursor->x) - grabc->geom.x;
				grabcy = (int)round(cursor->y) - grabc->geom.y;
				wlr_cursor_set_xcursor(cursor, cursor_mgr, "fleur");
				break;
			case CurResize:
				wlr_cursor_warp_closest(cursor, NULL,
				grabc->geom.x + grabc->geom.width,
				grabc->geom.y + grabc->geom.height);
				wlr_cursor_set_xcursor(cursor, cursor_mgr, "se-resize");
				break;
		}
	}
}

void
outputmgrapply(struct wl_listener *listener, void *data)
{
	struct wlr_output_configuration_v1 *config = data;
	outputmgrapplyortest(config, 0);
}

void
outputmgrapplyortest(struct wlr_output_configuration_v1 *config, int test)
{
	/*
	 * Called when a client such as wlr-randr requests a change in output
	 * configuration. This is only one way that the layout can be changed,
	 * so any Monitor information should be updated by updatemons() after an
	 * output_layout.change event, not here.
	 */
	struct wlr_output_configuration_head_v1 *config_head;
	int ok = 1;

	wl_list_for_each(config_head, &config->heads, link) {
		struct wlr_output *wlr_output = config_head->state.output;
		Monitor *m = wlr_output->data;
		struct wlr_output_state state;

		/* Ensure displays previously disabled by wlr-output-power-management-v1
		 * are properly handled*/
		m->asleep = 0;

		wlr_output_state_init(&state);
		wlr_output_state_set_enabled(&state, config_head->state.enabled);
		if (!config_head->state.enabled)
			goto apply_or_test;

		if (config_head->state.mode)
			wlr_output_state_set_mode(&state, config_head->state.mode);
		else
			wlr_output_state_set_custom_mode(&state,
					config_head->state.custom_mode.width,
					config_head->state.custom_mode.height,
					config_head->state.custom_mode.refresh);

		wlr_output_state_set_transform(&state, config_head->state.transform);
		wlr_output_state_set_scale(&state, config_head->state.scale);
		wlr_output_state_set_adaptive_sync_enabled(&state,
				config_head->state.adaptive_sync_enabled);

apply_or_test:
		ok &= test ? wlr_output_test_state(wlr_output, &state)
				: wlr_output_commit_state(wlr_output, &state);

		/* Don't move monitors if position wouldn't change, this to avoid
		* wlroots marking the output as manually configured.
		* wlr_output_layout_add does not like disabled outputs */
		if (!test && wlr_output->enabled && (m->m.x != config_head->state.x || m->m.y != config_head->state.y))
			wlr_output_layout_add(output_layout, wlr_output,
					config_head->state.x, config_head->state.y);

		wlr_output_state_finish(&state);
	}

	if (ok)
		wlr_output_configuration_v1_send_succeeded(config);
	else
		wlr_output_configuration_v1_send_failed(config);
	wlr_output_configuration_v1_destroy(config);

	/* https://codeberg.org/dwl/dwl/issues/577 */
	updatemons(NULL, NULL);
}

void
outputmgrtest(struct wl_listener *listener, void *data)
{
	struct wlr_output_configuration_v1 *config = data;
	outputmgrapplyortest(config, 1);
}

void
pointerfocus(Client *c, struct wlr_surface *surface, double sx, double sy,
		uint32_t time)
{
	struct timespec now;

	if (surface != seat->pointer_state.focused_surface &&
			sloppyfocus && time && c && !client_is_unmanaged(c))
		focusclient(c, 0);

	/* If surface is NULL, clear pointer focus */
	if (!surface) {
		wlr_seat_pointer_notify_clear_focus(seat);
		return;
	}

	if (!time) {
		clock_gettime(CLOCK_MONOTONIC, &now);
		time = now.tv_sec * 1000 + now.tv_nsec / 1000000;
	}

	/* Let the client know that the mouse cursor has entered one
	 * of its surfaces, and make keyboard focus follow if desired.
	 * wlroots makes this a no-op if surface is already focused */
	wlr_seat_pointer_notify_enter(seat, surface, sx, sy);
	wlr_seat_pointer_notify_motion(seat, time, sx, sy);
}

void
printstatus(void)
{
	Monitor *m = NULL;
	Client *c;
	uint32_t occ, urg, sel;
	const char *appid, *title;

	wl_list_for_each(m, &mons, link) {
		occ = urg = 0;
		wl_list_for_each(c, &clients, link) {
			if (c->mon != m)
				continue;
			occ |= c->tags;
			if (c->isurgent)
				urg |= c->tags;
		}
		if ((c = focustop(m))) {
			title = client_get_title(c);
			appid = client_get_appid(c);
			printf("%s title %s\n", m->wlr_output->name, title ? title : broken);
			printf("%s appid %s\n", m->wlr_output->name, appid ? appid : broken);
			printf("%s fullscreen %d\n", m->wlr_output->name, c->isfullscreen);
			printf("%s floating %d\n", m->wlr_output->name, c->isfloating);
			sel = c->tags;
		} else {
			printf("%s title \n", m->wlr_output->name);
			printf("%s appid \n", m->wlr_output->name);
			printf("%s fullscreen \n", m->wlr_output->name);
			printf("%s floating \n", m->wlr_output->name);
			sel = 0;
		}

		printf("%s selmon %u\n", m->wlr_output->name, m == selmon);
		printf("%s tags %"PRIu32" %"PRIu32" %"PRIu32" %"PRIu32"\n",
			m->wlr_output->name, occ, m->tagset[m->seltags], sel, urg);
		printf("%s layout %s\n", m->wlr_output->name, m->ltsymbol);
	}
	fflush(stdout);
}

void
powermgrsetmode(struct wl_listener *listener, void *data)
{
	struct wlr_output_power_v1_set_mode_event *event = data;
	struct wlr_output_state state = {0};
	Monitor *m = event->output->data;

	if (!m)
		return;

	m->gamma_lut_changed = 1; /* Reapply gamma LUT when re-enabling the ouput */
	wlr_output_state_set_enabled(&state, event->mode);
	wlr_output_commit_state(m->wlr_output, &state);

	m->asleep = !event->mode;
}

void
quit(const Arg *arg)
{
	wl_display_terminate(dpy);
}

void
rendermon(struct wl_listener *listener, void *data)
{
	/* This function is called every time an output is ready to display a frame,
	 * generally at the output's refresh rate (e.g. 60Hz). */
	Monitor *m = wl_container_of(listener, m, frame);
	Client *c;
	struct wlr_output_state pending = {0};
	struct wlr_gamma_control_v1 *gamma_control;
	struct timespec now;

	/* Render if no XDG clients have an outstanding resize and are visible on
	 * this monitor. */
	wl_list_for_each(c, &clients, link) {
		if (c->resize && !c->isfloating && client_is_rendered_on_mon(c, m) && !client_is_stopped(c))
			goto skip;
	}

	/*
	 * HACK: The "correct" way to set the gamma is to commit it together with
	 * the rest of the state in one go, but to do that we would need to rewrite
	 * wlr_scene_output_commit() in order to add the gamma to the pending
	 * state before committing, instead try to commit the gamma in one frame,
	 * and commit the rest of the state in the next one (or in the same frame if
	 * the gamma can not be committed).
	 */
	if (m->gamma_lut_changed) {
		gamma_control
				= wlr_gamma_control_manager_v1_get_control(gamma_control_mgr, m->wlr_output);
		m->gamma_lut_changed = 0;

		if (!wlr_gamma_control_v1_apply(gamma_control, &pending))
			goto commit;

		if (!wlr_output_test_state(m->wlr_output, &pending)) {
			wlr_gamma_control_v1_send_failed_and_destroy(gamma_control);
			goto commit;
		}
		wlr_output_commit_state(m->wlr_output, &pending);
		wlr_output_schedule_frame(m->wlr_output);
	} else {
commit:
		wlr_scene_output_commit(m->scene_output, NULL);
	}

skip:
	/* Let clients know a frame has been rendered */
	clock_gettime(CLOCK_MONOTONIC, &now);
	wlr_scene_output_send_frame_done(m->scene_output, &now);
	wlr_output_state_finish(&pending);
}

void
requestdecorationmode(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, set_decoration_mode);
	if (c->surface.xdg->initialized)
		wlr_xdg_toplevel_decoration_v1_set_mode(c->decoration,
				WLR_XDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE);
}

void
requeststartdrag(struct wl_listener *listener, void *data)
{
	struct wlr_seat_request_start_drag_event *event = data;

	if (wlr_seat_validate_pointer_grab_serial(seat, event->origin,
			event->serial))
		wlr_seat_start_pointer_drag(seat, event->drag, event->serial);
	else
		wlr_data_source_destroy(event->drag->source);
}

void
requestmonstate(struct wl_listener *listener, void *data)
{
	struct wlr_output_event_request_state *event = data;
	wlr_output_commit_state(event->output, event->state);
	updatemons(NULL, NULL);
}

void
resize(Client *c, struct wlr_box geo, int interact)
{
	struct wlr_box *bbox;
	struct wlr_box clip;

	if (!c->mon || !client_surface(c)->mapped)
		return;

	bbox = interact ? &sgeom : &c->mon->w;

	client_set_bounds(c, geo.width, geo.height);
	c->geom = geo;
	applybounds(c, bbox);

	/* Update scene-graph, including borders */
	wlr_scene_node_set_position(&c->scene->node, c->geom.x, c->geom.y);
	wlr_scene_node_set_position(&c->scene_surface->node, c->bw, c->bw);
	wlr_scene_rect_set_size(c->border[0], c->geom.width, c->bw);
	wlr_scene_rect_set_size(c->border[1], c->geom.width, c->bw);
	wlr_scene_rect_set_size(c->border[2], c->bw, c->geom.height - 2 * c->bw);
	wlr_scene_rect_set_size(c->border[3], c->bw, c->geom.height - 2 * c->bw);
	wlr_scene_node_set_position(&c->border[1]->node, 0, c->geom.height - c->bw);
	wlr_scene_node_set_position(&c->border[2]->node, 0, c->bw);
	wlr_scene_node_set_position(&c->border[3]->node, c->geom.width - c->bw, c->bw);

	/* this is a no-op if size hasn't changed */
	c->resize = client_set_size(c, c->geom.width - 2 * c->bw,
			c->geom.height - 2 * c->bw);
	client_get_clip(c, &clip);
	wlr_scene_subsurface_tree_set_clip(&c->scene_surface->node, &clip);
}

#else /*HOT*/

void
run(char *startup_cmd)
{
	/* Add a Unix socket to the Wayland display. */
	const char *socket = wl_display_add_socket_auto(dpy);
	if (!socket)
		die("startup: display_add_socket_auto");
	setenv("WAYLAND_DISPLAY", socket, 1);

	/* Start the backend. This will enumerate outputs and inputs, become the DRM
	 * master, etc */
	if (!wlr_backend_start(backend))
		die("startup: backend_start");

	/* Now that the socket exists and the backend is started, run the startup command */
	TSYM(void (*)(void), autostartexec)();
	if (startup_cmd) {
		int piperw[2];
		if (pipe(piperw) < 0)
			die("startup: pipe:");
		if ((child_pid = fork()) < 0)
			die("startup: fork:");
		if (child_pid == 0) {
			setsid();
			dup2(piperw[0], STDIN_FILENO);
			close(piperw[0]);
			close(piperw[1]);
			execl("/bin/sh", "/bin/sh", "-c", startup_cmd, NULL);
			die("startup: execl:");
		}
		dup2(piperw[1], STDOUT_FILENO);
		close(piperw[1]);
		close(piperw[0]);
	}

	/* Mark stdout as non-blocking to avoid people who does not close stdin
	 * nor consumes it in their startup script getting dwl frozen */
	if (fd_set_nonblock(STDOUT_FILENO) < 0)
		close(STDOUT_FILENO);

	TSYM(void (*)(void), printstatus)();

	/* At this point the outputs are initialized, choose initial selmon based on
	 * cursor position, and set default cursor image */
	selmon = TSYM(Monitor* (*)(double x, double y), xytomon)(cursor->x, cursor->y);

	/* TODO hack to get cursor to display in its initial location (100, 100)
	 * instead of (0, 0) and then jumping. still may not be fully
	 * initialized, as the image/coordinates are not transformed for the
	 * monitor when displayed here */
	wlr_cursor_warp_closest(cursor, NULL, cursor->x, cursor->y);
	wlr_cursor_set_xcursor(cursor, cursor_mgr, "default");

	/* Run the Wayland event loop. This does not return until you exit the
	 * compositor. Starting the backend rigged up all of the necessary event
	 * loop configuration to listen to libinput events, DRM events, generate
	 * frame events at the refresh rate, and so on. */
	wl_display_run(dpy);
}

#endif
#ifdef HOT

void
setcursor(struct wl_listener *listener, void *data)
{
	/* This event is raised by the seat when a client provides a cursor image */
	struct wlr_seat_pointer_request_set_cursor_event *event = data;
	/* If we're "grabbing" the cursor, don't use the client's image, we will
	 * restore it after "grabbing" sending a leave event, followed by a enter
	 * event, which will result in the client requesting set the cursor surface */
	if (cursor_mode != CurNormal && cursor_mode != CurPressed)
		return;
	/* This can be sent by any client, so we check to make sure this one is
	 * actually has pointer focus first. If so, we can tell the cursor to
	 * use the provided surface as the cursor image. It will set the
	 * hardware cursor on the output that it's currently on and continue to
	 * do so as the cursor moves between outputs. */
	if (event->seat_client == seat->pointer_state.focused_client)
		wlr_cursor_set_surface(cursor, event->surface,
				event->hotspot_x, event->hotspot_y);
}

void
setcursorshape(struct wl_listener *listener, void *data)
{
	struct wlr_cursor_shape_manager_v1_request_set_shape_event *event = data;
	if (cursor_mode != CurNormal && cursor_mode != CurPressed)
		return;
	/* This can be sent by any client, so we check to make sure this one is
	 * actually has pointer focus first. If so, we can tell the cursor to
	 * use the provided cursor shape. */
	if (event->seat_client == seat->pointer_state.focused_client)
		wlr_cursor_set_xcursor(cursor, cursor_mgr,
				wlr_cursor_shape_v1_name(event->shape));
}

void
setfloating(Client *c, int floating)
{
	Client *p = client_get_parent(c);
	c->isfloating = floating;
	/* If in floating layout do not change the client's layer */
	if (!c->mon || !client_surface(c)->mapped || !c->mon->lt[c->mon->sellt]->arrange)
		return;
	wlr_scene_node_reparent(&c->scene->node, layers[c->isfullscreen ||
			(p && p->isfullscreen) ? LyrFS
			: c->isfloating ? LyrFloat : LyrTile]);
	arrange(c->mon);
	printstatus();
}

void
setfullscreen(Client *c, int fullscreen)
{
	c->isfullscreen = fullscreen;
	if (!c->mon || !client_surface(c)->mapped)
		return;
	c->bw = fullscreen ? 0 : borderpx;
	client_set_fullscreen(c, fullscreen);
	wlr_scene_node_reparent(&c->scene->node, layers[c->isfullscreen
			? LyrFS : c->isfloating ? LyrFloat : LyrTile]);

	if (fullscreen) {
		c->prev = c->geom;
		resize(c, c->mon->m, 0);
	} else {
		/* restore previous size instead of arrange for floating windows since
		 * client positions are set by the user and cannot be recalculated */
		resize(c, c->prev, 0);
	}
	arrange(c->mon);
	printstatus();
}

void
setgamma(struct wl_listener *listener, void *data)
{
	struct wlr_gamma_control_manager_v1_set_gamma_event *event = data;
	Monitor *m = event->output->data;
	if (!m)
		return;
	m->gamma_lut_changed = 1;
	wlr_output_schedule_frame(m->wlr_output);
}

void
setlayout(const Arg *arg)
{
	if (!selmon)
		return;
	if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
		selmon->sellt ^= 1;
	if (arg && arg->v)
		selmon->lt[selmon->sellt] = (Layout *)arg->v;
	strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, LENGTH(selmon->ltsymbol));
	arrange(selmon);
	printstatus();
}

/* arg > 1.0 will set mfact absolutely */
void
setmfact(const Arg *arg)
{
	float f;

	if (!arg || !selmon || !selmon->lt[selmon->sellt]->arrange)
		return;
	f = arg->f < 1.0f ? arg->f + selmon->mfact : arg->f - 1.0f;
	if (f < 0.1 || f > 0.9)
		return;
	selmon->mfact = f;
	arrange(selmon);
}

void
setmon(Client *c, Monitor *m, uint32_t newtags)
{
	Monitor *oldmon = c->mon;

	if (oldmon == m)
		return;
	c->mon = m;
	c->prev = c->geom;

	/* Scene graph sends surface leave/enter events on move and resize */
	if (oldmon)
		arrange(oldmon);
	if (m) {
		/* Make sure window actually overlaps with the monitor */
		resize(c, c->geom, 0);
		c->tags = newtags ? newtags : m->tagset[m->seltags]; /* assign tags of target monitor */
		setfullscreen(c, c->isfullscreen); /* This will call arrange(c->mon) */
		setfloating(c, c->isfloating);
	}
	focusclient(focustop(selmon), 1);
}

void
setpsel(struct wl_listener *listener, void *data)
{
	/* This event is raised by the seat when a client wants to set the selection,
	 * usually when the user copies something. wlroots allows compositors to
	 * ignore such requests if they so choose, but in dwl we always honor
	 */
	struct wlr_seat_request_set_primary_selection_event *event = data;
	wlr_seat_set_primary_selection(seat, event->source, event->serial);
}

void
setsel(struct wl_listener *listener, void *data)
{
	/* This event is raised by the seat when a client wants to set the selection,
	 * usually when the user copies something. wlroots allows compositors to
	 * ignore such requests if they so choose, but in dwl we always honor
	 */
	struct wlr_seat_request_set_selection_event *event = data;
	wlr_seat_set_selection(seat, event->source, event->serial);
}

#else /*HOT*/

void
setup(void)
{
	int i, sig[] = {SIGCHLD, SIGINT, SIGTERM, SIGPIPE};
	struct sigaction sa = {.sa_flags = SA_RESTART, .sa_handler = SYM(handlesig)};
	sigemptyset(&sa.sa_mask);

	for (i = 0; i < (int)LENGTH(sig); i++)
		sigaction(sig[i], &sa, NULL);

	wlr_log_init(CSYM(enum wlr_log_importance, log_level), NULL);

	/* The Wayland display is managed by libwayland. It handles accepting
	 * clients from the Unix socket, manging Wayland globals, and so on. */
	dpy = wl_display_create();
	event_loop = wl_display_get_event_loop(dpy);

	/* The backend is a wlroots feature which abstracts the underlying input and
	 * output hardware. The autocreate option will choose the most suitable
	 * backend based on the current environment, such as opening an X11 window
	 * if an X11 server is running. */
	if (!(backend = wlr_backend_autocreate(event_loop, &session)))
		die("couldn't create backend");

	/* Initialize the scene graph used to lay out windows */
	scene = wlr_scene_create();
	root_bg = wlr_scene_rect_create(&scene->tree, 0, 0, TSYM(float*, rootcolor));
	for (i = 0; i < NUM_LAYERS; i++)
		layers[i] = wlr_scene_tree_create(&scene->tree);
	drag_icon = wlr_scene_tree_create(&scene->tree);
	wlr_scene_node_place_below(&drag_icon->node, &layers[LyrBlock]->node);

	/* Autocreates a renderer, either Pixman, GLES2 or Vulkan for us. The user
	 * can also specify a renderer using the WLR_RENDERER env var.
	 * The renderer is responsible for defining the various pixel formats it
	 * supports for shared memory, this configures that for clients. */
	if (!(drw = wlr_renderer_autocreate(backend)))
		die("couldn't create renderer");
	LISTEN_STATIC(&drw->events.lost, gpureset);

	/* Create shm, drm and linux_dmabuf interfaces by ourselves.
	 * The simplest way is call:
	 *      wlr_renderer_init_wl_display(drw);
	 * but we need to create manually the linux_dmabuf interface to integrate it
	 * with wlr_scene. */
	wlr_renderer_init_wl_shm(drw, dpy);

	if (wlr_renderer_get_texture_formats(drw, WLR_BUFFER_CAP_DMABUF)) {
		wlr_drm_create(dpy, drw);
		wlr_scene_set_linux_dmabuf_v1(scene,
				wlr_linux_dmabuf_v1_create_with_renderer(dpy, 5, drw));
	}

	/* Autocreates an allocator for us.
	 * The allocator is the bridge between the renderer and the backend. It
	 * handles the buffer creation, allowing wlroots to render onto the
	 * screen */
	if (!(alloc = wlr_allocator_autocreate(backend, drw)))
		die("couldn't create allocator");

	/* This creates some hands-off wlroots interfaces. The compositor is
	 * necessary for clients to allocate surfaces and the data device manager
	 * handles the clipboard. Each of these wlroots interfaces has room for you
	 * to dig your fingers in and play with their behavior if you want. Note that
	 * the clients cannot set the selection directly without compositor approval,
	 * see the setsel() function. */
	compositor = wlr_compositor_create(dpy, 6, drw);
	wlr_subcompositor_create(dpy);
	wlr_data_device_manager_create(dpy);
	wlr_export_dmabuf_manager_v1_create(dpy);
	wlr_screencopy_manager_v1_create(dpy);
	wlr_data_control_manager_v1_create(dpy);
	wlr_primary_selection_v1_device_manager_create(dpy);
	wlr_viewporter_create(dpy);
	wlr_single_pixel_buffer_manager_v1_create(dpy);
	wlr_fractional_scale_manager_v1_create(dpy, 1);
	wlr_presentation_create(dpy, backend);
	wlr_alpha_modifier_v1_create(dpy);

	/* Initializes the interface used to implement urgency hints */
	activation = wlr_xdg_activation_v1_create(dpy);
	LISTEN_STATIC(&activation->events.request_activate, urgent);

	gamma_control_mgr = wlr_gamma_control_manager_v1_create(dpy);
	LISTEN_STATIC(&gamma_control_mgr->events.set_gamma, setgamma);

	power_mgr = wlr_output_power_manager_v1_create(dpy);
	LISTEN_STATIC(&power_mgr->events.set_mode, powermgrsetmode);

	/* Creates an output layout, which a wlroots utility for working with an
	 * arrangement of screens in a physical layout. */
	output_layout = wlr_output_layout_create(dpy);
	LISTEN_STATIC(&output_layout->events.change, updatemons);
	wlr_xdg_output_manager_v1_create(dpy, output_layout);

	/* Configure a listener to be notified when new outputs are available on the
	 * backend. */
	wl_list_init(&mons);
	LISTEN_STATIC(&backend->events.new_output, createmon);

	/* Set up our client lists, the xdg-shell and the layer-shell. The xdg-shell is a
	 * Wayland protocol which is used for application windows. For more
	 * detail on shells, refer to the article:
	 *
	 * https://drewdevault.com/2018/07/29/Wayland-shells.html
	 */
	wl_list_init(&clients);
	wl_list_init(&fstack);

	xdg_shell = wlr_xdg_shell_create(dpy, 6);
	LISTEN_STATIC(&xdg_shell->events.new_toplevel, createnotify);
	LISTEN_STATIC(&xdg_shell->events.new_popup, createpopup);

	layer_shell = wlr_layer_shell_v1_create(dpy, 3);
	LISTEN_STATIC(&layer_shell->events.new_surface, createlayersurface);

	idle_notifier = wlr_idle_notifier_v1_create(dpy);

	idle_inhibit_mgr = wlr_idle_inhibit_v1_create(dpy);
	LISTEN_STATIC(&idle_inhibit_mgr->events.new_inhibitor, createidleinhibitor);

	session_lock_mgr = wlr_session_lock_manager_v1_create(dpy);
	LISTEN_GLOBAL(&session_lock_mgr->events.new_lock, lock_listener);
	LISTEN_STATIC(&session_lock_mgr->events.destroy, destroysessionmgr);
	locked_bg = wlr_scene_rect_create(layers[LyrBlock], sgeom.width, sgeom.height,
			(float [4]){0.1f, 0.1f, 0.1f, 1.0f});
	wlr_scene_node_set_enabled(&locked_bg->node, 0);

	/* Use decoration protocols to negotiate server-side decorations */
	wlr_server_decoration_manager_set_default_mode(
			wlr_server_decoration_manager_create(dpy),
			WLR_SERVER_DECORATION_MANAGER_MODE_SERVER);
	xdg_decoration_mgr = wlr_xdg_decoration_manager_v1_create(dpy);
	LISTEN_STATIC(&xdg_decoration_mgr->events.new_toplevel_decoration, createdecoration);

	pointer_constraints = wlr_pointer_constraints_v1_create(dpy);
	LISTEN_STATIC(&pointer_constraints->events.new_constraint, createpointerconstraint);

	relative_pointer_mgr = wlr_relative_pointer_manager_v1_create(dpy);

	/*
	 * Creates a cursor, which is a wlroots utility for tracking the cursor
	 * image shown on screen.
	 */
	cursor = wlr_cursor_create();
	wlr_cursor_attach_output_layout(cursor, output_layout);

	/* Creates an xcursor manager, another wlroots utility which loads up
	 * Xcursor themes to source cursor images from and makes sure that cursor
	 * images are available at all scale factors on the screen (necessary for
	 * HiDPI support). Scaled cursors will be loaded with each output. */
	cursor_mgr = wlr_xcursor_manager_create(NULL, 24);
	setenv("XCURSOR_SIZE", "24", 1);

	/*
	 * wlr_cursor *only* displays an image on screen. It does not move around
	 * when the pointer moves. However, we can attach input devices to it, and
	 * it will generate aggregate events for all of them. In these events, we
	 * can choose how we want to process them, forwarding them to clients and
	 * moving the cursor around. More detail on this process is described in
	 * https://drewdevault.com/2018/07/17/Input-handling-in-wlroots.html
	 *
	 * And more comments are sprinkled throughout the notify functions above.
	 */
	LISTEN_STATIC(&cursor->events.motion, motionrelative);
	LISTEN_STATIC(&cursor->events.motion_absolute, motionabsolute);
	LISTEN_STATIC(&cursor->events.button, buttonpress);
	LISTEN_STATIC(&cursor->events.axis, axisnotify);
	LISTEN_STATIC(&cursor->events.frame, cursorframe);

	cursor_shape_mgr = wlr_cursor_shape_manager_v1_create(dpy, 1);
	LISTEN_STATIC(&cursor_shape_mgr->events.request_set_shape, setcursorshape);

	/*
	 * Configures a seat, which is a single "seat" at which a user sits and
	 * operates the computer. This conceptually includes up to one keyboard,
	 * pointer, touch, and drawing tablet device. We also rig up a listener to
	 * let us know when new input devices are available on the backend.
	 */
	LISTEN_STATIC(&backend->events.new_input, inputdevice);
	virtual_keyboard_mgr = wlr_virtual_keyboard_manager_v1_create(dpy);
	LISTEN_STATIC(&virtual_keyboard_mgr->events.new_virtual_keyboard, virtualkeyboard);
	virtual_pointer_mgr = wlr_virtual_pointer_manager_v1_create(dpy);
	LISTEN_STATIC(&virtual_pointer_mgr->events.new_virtual_pointer, virtualpointer);

	pointer_gestures = wlr_pointer_gestures_v1_create(dpy);
	LISTEN_STATIC(&cursor->events.swipe_begin, swipe_begin);
	LISTEN_STATIC(&cursor->events.swipe_update, swipe_update);
	LISTEN_STATIC(&cursor->events.swipe_end, swipe_end);
	LISTEN_STATIC(&cursor->events.pinch_begin, pinch_begin);
	LISTEN_STATIC(&cursor->events.pinch_update, pinch_update);
	LISTEN_STATIC(&cursor->events.pinch_end, pinch_end);
	LISTEN_STATIC(&cursor->events.hold_begin, hold_begin);
	LISTEN_STATIC(&cursor->events.hold_end, hold_end);

	seat = wlr_seat_create(dpy, "seat0");
	LISTEN_STATIC(&seat->events.request_set_cursor, setcursor);
	LISTEN_STATIC(&seat->events.request_set_selection, setsel);
	LISTEN_STATIC(&seat->events.request_set_primary_selection, setpsel);
	LISTEN_STATIC(&seat->events.request_start_drag, requeststartdrag);
	LISTEN_STATIC(&seat->events.start_drag, startdrag);

	kb_group = TSYM(KeyboardGroup *(*)(void), createkeyboardgroup)();
	wl_list_init(&kb_group->destroy.link);

	output_mgr = wlr_output_manager_v1_create(dpy);
	LISTEN_STATIC(&output_mgr->events.apply, outputmgrapply);
	LISTEN_STATIC(&output_mgr->events.test, outputmgrtest);

	/* Make sure XWayland clients don't connect to the parent X server,
	 * e.g when running in the x11 backend or the wayland backend and the
	 * compositor has Xwayland support */
	unsetenv("DISPLAY");
#ifdef XWAYLAND
	/*
	 * Initialise the XWayland X server.
	 * It will be started when the first X client is started.
	 */
	if ((xwayland = wlr_xwayland_create(dpy, compositor, 1))) {
		LISTEN_STATIC(&xwayland->events.ready, xwaylandready);
		LISTEN_STATIC(&xwayland->events.new_surface, createnotifyx11);

		setenv("DISPLAY", xwayland->display_name, 1);
	} else {
		fprintf(stderr, "failed to setup XWayland X server, continuing without it\n");
	}
#endif
}

#endif
#ifdef HOT

void
spawn(const Arg *arg)
{
	if (fork() == 0) {
		dup2(STDERR_FILENO, STDOUT_FILENO);
		setsid();
		execvp(((char **)arg->v)[0], (char **)arg->v);
		die("dwl: execvp %s failed:", ((char **)arg->v)[0]);
	}
}

void spawnscratch(const Arg *arg)
{
    if (next_scratch != 0 && kill(next_scratch, 0) == 0)
        return;

	if (fork() == 0) {
		dup2(STDERR_FILENO, STDOUT_FILENO);
		setsid();
		execvp(((char **)arg->v)[1], ((char **)arg->v)+1);
		die("dwl: execvp %s failed:", ((char **)arg->v)[1]);
	}
}

void
startdrag(struct wl_listener *listener, void *data)
{
	struct wlr_drag *drag = data;
	if (!drag->icon)
		return;

	drag->icon->data = &wlr_scene_drag_icon_create(drag_icon, drag->icon)->node;
	LISTEN_STATIC(&drag->icon->events.destroy, destroydragicon);
}

void
tag(const Arg *arg)
{
	Client *sel = focustop(selmon);
	if (!sel || (arg->ui & TAGMASK) == 0)
		return;

	sel->tags = arg->ui & TAGMASK;
	focusclient(focustop(selmon), 1);
	arrange(selmon);
	printstatus();
}

void
tagmon(const Arg *arg)
{
	Client *sel = focustop(selmon);
	if (sel)
		setmon(sel, dirtomon(arg->i), 0);
}

void
tile(Monitor *m)
{
	unsigned int mw, my, ty;
	int i, n = 0;
	Client *c;

	wl_list_for_each(c, &clients, link)
		if (VISIBLEON(c, m) && !c->isfloating && !c->isfullscreen)
			n++;
	if (n == 0)
		return;

	if (n > m->nmaster)
		mw = m->nmaster ? (int)roundf(m->w.width * m->mfact) : 0;
	else
		mw = m->w.width;
	i = my = ty = 0;
	wl_list_for_each(c, &clients, link) {
		if (!VISIBLEON(c, m) || c->isfloating || c->isfullscreen)
			continue;
		if (i < m->nmaster) {
			resize(c, (struct wlr_box){.x = m->w.x, .y = m->w.y + my, .width = mw,
				.height = (m->w.height - my) / (MIN(n, m->nmaster) - i)}, 0);
			my += c->geom.height;
		} else {
			resize(c, (struct wlr_box){.x = m->w.x + mw, .y = m->w.y + ty,
				.width = m->w.width - mw, .height = (m->w.height - ty) / (n - i)}, 0);
			ty += c->geom.height;
		}
		i++;
	}
}

void
togglefloating(const Arg *arg)
{
	Client *sel = focustop(selmon);
	/* return if fullscreen */
	if (sel && !sel->isfullscreen)
		setfloating(sel, !sel->isfloating);
}

void
togglefullscreen(const Arg *arg)
{
	Client *sel = focustop(selmon);
	if (sel)
		setfullscreen(sel, !sel->isfullscreen);
}

void
toggletag(const Arg *arg)
{
	uint32_t newtags;
	Client *sel = focustop(selmon);
	if (!sel || !(newtags = sel->tags ^ (arg->ui & TAGMASK)))
		return;

	sel->tags = newtags;
	focusclient(focustop(selmon), 1);
	arrange(selmon);
	printstatus();
}

void
toggleview(const Arg *arg)
{
	uint32_t newtagset;
	if (!(newtagset = selmon ? selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK) : 0))
		return;

	selmon->tagset[selmon->seltags] = newtagset;
	focusclient(focustop(selmon), 1);
	arrange(selmon);
	printstatus();
}

void
unlocksession(struct wl_listener *listener, void *data)
{
	SessionLock *lock = wl_container_of(listener, lock, unlock);
	destroylock(lock, 1);
}

void
unmaplayersurfacenotify(struct wl_listener *listener, void *data)
{
	LayerSurface *l = wl_container_of(listener, l, unmap);

	l->mapped = 0;
	wlr_scene_node_set_enabled(&l->scene->node, 0);
	if (l == exclusive_focus)
		exclusive_focus = NULL;
	if (l->layer_surface->output && (l->mon = l->layer_surface->output->data))
		arrangelayers(l->mon);
	if (l->layer_surface->surface == seat->keyboard_state.focused_surface)
		focusclient(focustop(selmon), 1);
	motionnotify(0, NULL, 0, 0, 0, 0);
}

void
unmapnotify(struct wl_listener *listener, void *data)
{
	/* Called when the surface is unmapped, and should no longer be shown. */
	Client *c = wl_container_of(listener, c, unmap);
	if (c == grabc) {
		cursor_mode = CurNormal;
		grabc = NULL;
	}

	if (c->swallowedby)
		swallow(c->swallowedby, c);

	if (client_is_unmanaged(c)) {
		if (c == exclusive_focus) {
			exclusive_focus = NULL;
			focusclient(focustop(selmon), 1);
		}
	} else {
		if (!c->swallowing)
			wl_list_remove(&c->link);
		setmon(c, NULL, 0);
		if (!c->swallowing)
			wl_list_remove(&c->flink);
	}

	if (c->swallowedby) {
		c->swallowedby->prev = c->geom;
		setfullscreen(c->swallowedby, c->isfullscreen);
		c->swallowedby->swallowing = NULL;
		c->swallowedby = NULL;
	}

	if (c->swallowing) {
		c->swallowing->swallowedby = NULL;
		c->swallowing = NULL;
	}

	wlr_scene_node_destroy(&c->scene->node);
	printstatus();
	motionnotify(0, NULL, 0, 0, 0, 0);
}

void
updatemons(struct wl_listener *listener, void *data)
{
	/*
	 * Called whenever the output layout changes: adding or removing a
	 * monitor, changing an output's mode or position, etc. This is where
	 * the change officially happens and we update geometry, window
	 * positions, focus, and the stored configuration in wlroots'
	 * output-manager implementation.
	 */
	struct wlr_output_configuration_v1 *config
			= wlr_output_configuration_v1_create();
	Client *c;
	struct wlr_output_configuration_head_v1 *config_head;
	Monitor *m;

	/* First remove from the layout the disabled monitors */
	wl_list_for_each(m, &mons, link) {
		if (m->wlr_output->enabled || m->asleep)
			continue;
		config_head = wlr_output_configuration_head_v1_create(config, m->wlr_output);
		config_head->state.enabled = 0;
		/* Remove this output from the layout to avoid cursor enter inside it */
		wlr_output_layout_remove(output_layout, m->wlr_output);
		closemon(m);
		m->m = m->w = (struct wlr_box){0};
	}
	/* Insert outputs that need to */
	wl_list_for_each(m, &mons, link) {
		if (m->wlr_output->enabled
				&& !wlr_output_layout_get(output_layout, m->wlr_output))
			wlr_output_layout_add_auto(output_layout, m->wlr_output);
	}

	/* Now that we update the output layout we can get its box */
	wlr_output_layout_get_box(output_layout, NULL, &sgeom);

	wlr_scene_node_set_position(&root_bg->node, sgeom.x, sgeom.y);
	wlr_scene_rect_set_size(root_bg, sgeom.width, sgeom.height);

	/* Make sure the clients are hidden when dwl is locked */
	wlr_scene_node_set_position(&locked_bg->node, sgeom.x, sgeom.y);
	wlr_scene_rect_set_size(locked_bg, sgeom.width, sgeom.height);

	wl_list_for_each(m, &mons, link) {
		if (!m->wlr_output->enabled)
			continue;
		config_head = wlr_output_configuration_head_v1_create(config, m->wlr_output);

		/* Get the effective monitor geometry to use for surfaces */
		wlr_output_layout_get_box(output_layout, m->wlr_output, &m->m);
		m->w = m->m;
		wlr_scene_output_set_position(m->scene_output, m->m.x, m->m.y);

		wlr_scene_node_set_position(&m->fullscreen_bg->node, m->m.x, m->m.y);
		wlr_scene_rect_set_size(m->fullscreen_bg, m->m.width, m->m.height);

		if (m->lock_surface) {
			struct wlr_scene_tree *scene_tree = m->lock_surface->surface->data;
			wlr_scene_node_set_position(&scene_tree->node, m->m.x, m->m.y);
			wlr_session_lock_surface_v1_configure(m->lock_surface, m->m.width, m->m.height);
		}

		/* Calculate the effective monitor geometry to use for clients */
		arrangelayers(m);
		/* Don't move clients to the left output when plugging monitors */
		arrange(m);
		/* make sure fullscreen clients have the right size */
		if ((c = focustop(m)) && c->isfullscreen)
			resize(c, m->m, 0);

		/* Try to re-set the gamma LUT when updating monitors,
		 * it's only really needed when enabling a disabled output, but meh. */
		m->gamma_lut_changed = 1;

		config_head->state.x = m->m.x;
		config_head->state.y = m->m.y;

		if (!selmon) {
			selmon = m;
		}
	}

	if (selmon && selmon->wlr_output->enabled) {
		wl_list_for_each(c, &clients, link) {
			if (!c->mon && client_surface(c)->mapped)
				setmon(c, selmon, c->tags);
		}
		focusclient(focustop(selmon), 1);
		if (selmon->lock_surface) {
			client_notify_enter(selmon->lock_surface->surface,
					wlr_seat_get_keyboard(seat));
			client_activate_surface(selmon->lock_surface->surface, 1);
		}
	}

	/* FIXME: figure out why the cursor image is at 0,0 after turning all
	 * the monitors on.
	 * Move the cursor image where it used to be. It does not generate a
	 * wl_pointer.motion event for the clients, it's only the image what it's
	 * at the wrong position after all. */
	wlr_cursor_move(cursor, NULL, 0, 0);

	wlr_output_manager_v1_set_configuration(output_mgr, config);
}

void
updatetitle(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, set_title);
	if (c == focustop(c->mon))
		printstatus();
}

void
urgent(struct wl_listener *listener, void *data)
{
	struct wlr_xdg_activation_v1_request_activate_event *event = data;
	Client *c = NULL;
	toplevel_from_wlr_surface(event->surface, &c, NULL);
	if (!c || c == focustop(selmon))
		return;

	c->isurgent = 1;
	printstatus();

	if (client_surface(c)->mapped)
		client_set_border_color(c, urgentcolor);
}

void
view(const Arg *arg)
{
	if (!selmon || (arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
		return;
	selmon->seltags ^= 1; /* toggle sel tagset */
	if (arg->ui & TAGMASK)
		selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
	focusclient(focustop(selmon), 1);
	arrange(selmon);
	printstatus();
}

void
virtualkeyboard(struct wl_listener *listener, void *data)
{
	struct wlr_virtual_keyboard_v1 *kb = data;
	/* virtual keyboards shouldn't share keyboard group */
	KeyboardGroup *group = createkeyboardgroup();
	/* Set the keymap to match the group keymap */
	wlr_keyboard_set_keymap(&kb->keyboard, group->wlr_group->keyboard.keymap);
	LISTEN(&kb->keyboard.base.events.destroy, &group->destroy, destroykeyboardgroup);

	/* Add the new keyboard to the group */
	wlr_keyboard_group_add_keyboard(group->wlr_group, &kb->keyboard);
}

void
virtualpointer(struct wl_listener *listener, void *data)
{
	struct wlr_virtual_pointer_v1_new_pointer_event *event = data;
	struct wlr_input_device *device = &event->new_pointer->pointer.base;

	wlr_cursor_attach_input_device(cursor, device);
	if (event->suggested_output)
		wlr_cursor_map_input_to_output(cursor, device, event->suggested_output);
}

Monitor *
xytomon(double x, double y)
{
	struct wlr_output *o = wlr_output_layout_output_at(output_layout, x, y);
	return o ? o->data : NULL;
}

void
xytonode(double x, double y, struct wlr_surface **psurface,
		Client **pc, LayerSurface **pl, double *nx, double *ny)
{
	struct wlr_scene_node *node, *pnode;
	struct wlr_surface *surface = NULL;
	Client *c = NULL;
	LayerSurface *l = NULL;
	int layer;

	for (layer = NUM_LAYERS - 1; !surface && layer >= 0; layer--) {
		if (!(node = wlr_scene_node_at(&layers[layer]->node, x, y, nx, ny)))
			continue;

		if (node->type == WLR_SCENE_NODE_BUFFER)
			surface = wlr_scene_surface_try_from_buffer(
					wlr_scene_buffer_from_node(node))->surface;
		/* Walk the tree to find a node that knows the client */
		for (pnode = node; pnode && !c; pnode = &pnode->parent->node)
			c = pnode->data;
		if (c && c->type == LayerShell) {
			c = NULL;
			l = pnode->data;
		}
	}

	if (psurface) *psurface = surface;
	if (pc) *pc = c;
	if (pl) *pl = l;
}

void
zoom(const Arg *arg)
{
	Client *c, *sel = focustop(selmon);

	if (!sel || !selmon || !selmon->lt[selmon->sellt]->arrange || sel->isfloating)
		return;

	/* Search for the first tiled window that is not sel, marking sel as
	 * NULL if we pass it along the way */
	wl_list_for_each(c, &clients, link) {
		if (VISIBLEON(c, selmon) && !c->isfloating) {
			if (c != sel)
				break;
			sel = NULL;
		}
	}

	/* Return if no other tiled window was found */
	if (&c->link == &clients)
		return;

	/* If we passed sel, move c to the front; otherwise, move sel to the
	 * front */
	if (!sel)
		sel = c;
	wl_list_remove(&sel->link);
	wl_list_insert(&clients, &sel->link);

	focusclient(sel, 1);
	arrange(selmon);
}

#ifdef XWAYLAND
void
activatex11(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, activate);

	/* Only "managed" windows can be activated */
	if (!client_is_unmanaged(c))
		wlr_xwayland_surface_activate(c->surface.xwayland, 1);
}

void
associatex11(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, associate);

	LISTEN(&client_surface(c)->events.map, &c->map, mapnotify);
	LISTEN(&client_surface(c)->events.unmap, &c->unmap, unmapnotify);
}

void
configurex11(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, configure);
	struct wlr_xwayland_surface_configure_event *event = data;
	/* TODO: figure out if there is another way to do this */
	if (!c->mon) {
		wlr_xwayland_surface_configure(c->surface.xwayland,
				event->x, event->y, event->width, event->height);
		return;
	}
	if (c->isfloating || client_is_unmanaged(c))
		resize(c, (struct wlr_box){.x = event->x, .y = event->y,
				.width = event->width + c->bw * 2, .height = event->height + c->bw * 2}, 0);
	else
		arrange(c->mon);
}

void
createnotifyx11(struct wl_listener *listener, void *data)
{
	struct wlr_xwayland_surface *xsurface = data;
	Client *c;

	/* Allocate a Client for this surface */
	c = xsurface->data = ecalloc(1, sizeof(*c));
	c->surface.xwayland = xsurface;
	c->type = X11;
	c->bw = client_is_unmanaged(c) ? 0 : borderpx;

	/* Listen to the various events it can emit */
	LISTEN(&xsurface->events.associate, &c->associate, associatex11);
	LISTEN(&xsurface->events.destroy, &c->destroy, destroynotify);
	LISTEN(&xsurface->events.dissociate, &c->dissociate, dissociatex11);
	LISTEN(&xsurface->events.request_activate, &c->activate, activatex11);
	LISTEN(&xsurface->events.request_configure, &c->configure, configurex11);
	LISTEN(&xsurface->events.request_fullscreen, &c->fullscreen, fullscreennotify);
	LISTEN(&xsurface->events.set_hints, &c->set_hints, sethints);
	LISTEN(&xsurface->events.set_title, &c->set_title, updatetitle);
}

void
dissociatex11(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, dissociate);
	UNLISTEN(&c->map);
	UNLISTEN(&c->unmap);
}

xcb_atom_t
getatom(xcb_connection_t *xc, const char *name)
{
	xcb_atom_t atom = 0;
	xcb_intern_atom_reply_t *reply;
	xcb_intern_atom_cookie_t cookie = xcb_intern_atom(xc, 0, strlen(name), name);
	if ((reply = xcb_intern_atom_reply(xc, cookie, NULL)))
		atom = reply->atom;
	free(reply);

	return atom;
}

void
sethints(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, set_hints);
	struct wlr_surface *surface = client_surface(c);
	if (c == focustop(selmon))
		return;

	c->isurgent = xcb_icccm_wm_hints_get_urgency(c->surface.xwayland->hints);
	printstatus();

	if (c->isurgent && surface && surface->mapped)
		client_set_border_color(c, urgentcolor);
}

void
xwaylandready(struct wl_listener *listener, void *data)
{
	struct wlr_xcursor *xcursor;
	xcb_connection_t *xc = xcb_connect(xwayland->display_name, NULL);
	int err = xcb_connection_has_error(xc);
	if (err) {
		fprintf(stderr, "xcb_connect to X server failed with code %d\n. Continuing with degraded functionality.\n", err);
		return;
	}

	/* Collect atoms we are interested in. If getatom returns 0, we will
	 * not detect that window type. */
	netatom[NetWMWindowTypeDialog] = getatom(xc, "_NET_WM_WINDOW_TYPE_DIALOG");
	netatom[NetWMWindowTypeSplash] = getatom(xc, "_NET_WM_WINDOW_TYPE_SPLASH");
	netatom[NetWMWindowTypeToolbar] = getatom(xc, "_NET_WM_WINDOW_TYPE_TOOLBAR");
	netatom[NetWMWindowTypeUtility] = getatom(xc, "_NET_WM_WINDOW_TYPE_UTILITY");

	/* assign the one and only seat */
	wlr_xwayland_set_seat(xwayland, seat);

	/* Set the default XWayland cursor to match the rest of dwl. */
	if ((xcursor = wlr_xcursor_manager_get_xcursor(cursor_mgr, "default", 1)))
		wlr_xwayland_set_cursor(xwayland,
				xcursor->images[0]->buffer, xcursor->images[0]->width * 4,
				xcursor->images[0]->width, xcursor->images[0]->height,
				xcursor->images[0]->hotspot_x, xcursor->images[0]->hotspot_y);

	xcb_disconnect(xc);
}
#endif

#else /* HOT */
void*
load(void)
{
    const char* path = get_module_path();
    char load[PATH_MAX] = "/tmp/dwl.soXXXXXX";
    void* new;

    if (!path) {
        fprintf(stderr, "cannot find dwl.so\n");
    }

    do {
        mktemp(load);
        errno = 0;
        symlink(path, load);
    } while(errno == EEXIST);

    new = dlopen(load, RTLD_NOW|RTLD_LOCAL);

    unlink(load);
    if (new == NULL)
        fprintf(stderr, "error while loading %s: %s\n", path, dlerror());
    else
        printf("loaded: %s\n", path);

    return new;
}

const char *
get_module_path(void) {
    char home[PATH_MAX];
    strcpy(home, getenv("HOME"));
    strcat(home, "/.local/lib");
    const char* abspaths[] = {".", home, "/usr/share/lib", "/usr/local/lib", "/usr/local/share/lib"};
    const char* relpaths[] = {"", "/../lib"};
    char paths[LENGTH(abspaths) + LENGTH(relpaths)][PATH_MAX];
    static char out[PATH_MAX] = "./";

    for (size_t i = 0; i < LENGTH(abspaths); i++)
        realpath(abspaths[i], paths[i]);

    for (size_t i = 0; i < LENGTH(relpaths); i++)
    {
        char tmp[PATH_MAX];
        strcpy(tmp, runpath);
        strcat(tmp, relpaths[i]);
        realpath(tmp, paths[LENGTH(abspaths) + i]);
    }



    for (size_t i = 0; i < LENGTH(paths); i++)
    {
        char tmp[PATH_MAX];
        printf("checking path: %s\n", paths[i]);
        strcpy(tmp, paths[i]);
        // printf("tmp: %s\n", tmp);
        strcat(tmp, "/dwl.so");
        if (access(tmp, F_OK|R_OK) == 0)
        {
            strcpy(out, tmp);
            return out;
        }
    }

    return NULL;
}

void
reload(const Arg* arg)
{
    char* error;
    void* new;
    size_t i = 0;

    // deinitialize previous module
    if (last_module) {
        // dlclose(last_module);
        last_module = NULL;
    }

    wlr_log(WLR_INFO, "reloading");

    new = load();

    if (new == NULL)
    {
        wlr_log(WLR_ERROR, "couldn't load new dwl module from %s", get_module_path());
        system("notify-send -u low \"failed to reload dwl\"");
        return;
    }

    wlr_log(WLR_DEBUG, "---------- listens ---------");
    for(listens* a = listeners; a != NULL; a = a->next)
    {
        Dl_info info;
        void* old = a->listen->notify;
        dladdr(a->listen->notify, &info);
        a->listen->notify = dlsym(new, info.dli_sname);
        if ((error = dlerror()) != NULL){
            fprintf(stderr, "reload failure: %s", error);
            a->listen->notify = old;
            return;
        }
        wlr_log(WLR_DEBUG, "replaced listener: %s", info.dli_sname);
        i++;
    }

    wlr_log(WLR_DEBUG, "----------  done!  ---------");
    wlr_log(WLR_DEBUG, "replaced %zu listeners", i);

    last_module = dwl_module;
    dwl_module = new;

    system("notify-send -u low \"reloaded dwl\"");

}

int
main(int argc, char *argv[])
{
	char *startup_cmd = NULL;
	int c;

    runpath = dirname(argv[0]);
    dwl_module = load();

	while ((c = getopt(argc, argv, "s:hdv")) != -1) {
		if (c == 's')
			startup_cmd = optarg;
		else if (c == 'd')
			CSYM(enum wlr_log_importance, log_level) = WLR_DEBUG;
		else if (c == 'v')
			die("dwl " VERSION);
		else
			goto usage;
	}
	if (optind < argc)
		goto usage;

	/* Wayland requires XDG_RUNTIME_DIR for creating its communications socket */
	if (!getenv("XDG_RUNTIME_DIR"))
		die("XDG_RUNTIME_DIR must be set");
	setup();
	run(startup_cmd);
	cleanup();
	return EXIT_SUCCESS;

usage:
	die("Usage: %s [-v] [-d] [-s startup command]", argv[0]);
}
#endif