2bwm.c

/* 2bwm, a fast floating WM  with the particularity of having 2 borders written
 * over the XCB library and derived from mcwm written by Michael Cardell.
 * Heavily modified version of http://www.hack.org/mc/hacks/mcwm/
 * Copyright (c) 2010, 2011, 2012 Michael Cardell Widerkrantz, mc at the domain hack.org.
 * Copyright (c) 2014, 2020 Patrick Louis, patrick at the domain psychology dot wtf.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#include <stdio.h>
#include <stdbool.h>
#include <stdint.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <xcb/randr.h>
#include <xcb/xcb_keysyms.h>
#include <xcb/xcb_icccm.h>
#include <xcb/xcb_ewmh.h>
#include <xcb/xcb_xrm.h>
#include <X11/keysym.h>
#include "list.h"
#include "definitions.h"
#include "types.h"

///---Internal Constants---///
///---Globals---///
static xcb_generic_event_t *ev  = NULL;
static void (*events[XCB_NO_OPERATION])(xcb_generic_event_t *e);
static unsigned int numlockmask = 0;
static bool is_sloppy = true;              // by default use sloppy focus
int sigcode = 0;                           // Signal code. Non-zero if we've been interruped by a signal.
xcb_connection_t *conn = NULL;             // Connection to X server.
xcb_ewmh_connection_t *ewmh = NULL;        // Ewmh Connection.
xcb_screen_t     *screen = NULL;           // Our current screen.
int randrbase = 0;                         // Beginning of RANDR extension events.
static uint8_t curws = 0;                  // Current workspace.
struct client *focuswin = NULL;            // Current focus window.
static xcb_drawable_t top_win=0;           // Window always on top.
static xcb_drawable_t dock_win=0;          // A single dock always on top.
static struct item *winlist = NULL;        // Global list of all client windows.
static struct item *monlist = NULL;        // List of all physical monitor outputs.
static struct item *wslist[WORKSPACES];
///---Global configuration.---///
static const char *atomnames[NB_ATOMS][1] = {
	{"WM_DELETE_WINDOW"},
	{"WM_CHANGE_STATE"}
};

xcb_atom_t ATOM[NB_ATOMS];
///---Functions prototypes---///
static void run(void);
static bool setup(int);
static void install_sig_handlers(void);
static void start(const Arg *);
static void mousemotion(const Arg *);
static void cursor_move(const Arg *);
static void changeworkspace(const Arg *);
static void changeworkspace_helper(const uint32_t);
static void focusnext(const Arg *);
static void focusnext_helper(bool);
static void sendtoworkspace(const Arg *);
static void sendtonextworkspace(const Arg *);
static void sendtoprevworkspace(const Arg *);
static void resizestep(const Arg *);
static void resizestep_aspect(const Arg *);
static void movestep(const Arg *);
static void maxvert_hor(const Arg *);
static void maxhalf(const Arg *);
static void teleport(const Arg *);
static void changescreen(const Arg *);
static void grabkeys(void);
static void twobwm_restart();
static void twobwm_exit();
static void centerpointer(xcb_drawable_t, struct client *);
static void always_on_top();
static bool setup_keyboard(void);
static bool setupscreen(void);
static int  setuprandr(void);
static void arrangewindows(void);
static void prevworkspace();
static void nextworkspace();
static void getrandr(void);
static void raise_current_window(void);
static void raiseorlower();
static void setunfocus(void);
static void maximize(const Arg *);
static void fullscreen(const Arg *);
static void unmaxwin(struct client *);
static void maxwin(struct client *, uint8_t);
static void maximize_helper(struct client *,uint16_t, uint16_t, uint16_t, uint16_t);
static void hide();
static void clientmessage(xcb_generic_event_t *);
static void deletewin();
static void unkillable();
static void fix();
static void check_name(struct client *);
static void addtoclientlist(const xcb_drawable_t);
static void configurerequest(xcb_generic_event_t *);
static void buttonpress(xcb_generic_event_t *);
static void unmapnotify(xcb_generic_event_t *);
static void mapnotify(xcb_generic_event_t *);
static void destroynotify(xcb_generic_event_t *);
static void circulaterequest(xcb_generic_event_t *);
static void newwin(xcb_generic_event_t *);
static void handle_keypress(xcb_generic_event_t *);
static xcb_cursor_t Create_Font_Cursor(xcb_connection_t *, uint16_t);
static xcb_keycode_t *xcb_get_keycodes(xcb_keysym_t);
static xcb_screen_t *xcb_screen_of_display(xcb_connection_t *, int);
static struct client *setupwin(xcb_window_t);
static struct client create_back_win(void);
static void cleanup(void);
static uint32_t getwmdesktop(xcb_drawable_t);
static void addtoworkspace(struct client *, uint32_t);
static void grabbuttons(struct client *);
static void delfromworkspace(struct client *);
static void unkillablewindow(struct client *);
static void fixwindow(struct client *);
static uint32_t getcolor(const char *);
static void forgetclient(struct client *);
static void forgetwin(xcb_window_t);
static void fitonscreen(struct client *);
static void getoutputs(xcb_randr_output_t *,const int, xcb_timestamp_t);
static void arrbymon(struct monitor *);
static struct monitor *findmonitor(xcb_randr_output_t);
static struct monitor *findclones(xcb_randr_output_t, const int16_t, const int16_t);
static struct monitor *findmonbycoord(const int16_t, const int16_t);
static void delmonitor(struct monitor *);
static struct monitor *addmonitor(xcb_randr_output_t, const int16_t, const int16_t, const uint16_t, const uint16_t);
static void raisewindow(xcb_drawable_t);
static void movelim(struct client *);
static void movewindow(xcb_drawable_t, const int16_t, const int16_t);
static struct client *findclient(const xcb_drawable_t *);
static void setfocus(struct client *);
static void resizelim(struct client *);
static void resize(xcb_drawable_t, const uint16_t, const uint16_t);
static void moveresize(xcb_drawable_t, const uint16_t, const uint16_t,const uint16_t, const uint16_t);
static void mousemove(const int16_t,const int16_t);
static void mouseresize(struct client *,const int16_t,const int16_t);
static void setborders(struct client *,const bool);
static void unmax(struct client *);
static bool getpointer(const xcb_drawable_t *, int16_t *,int16_t *);
static bool getgeom(const xcb_drawable_t *, int16_t *, int16_t *, uint16_t *,uint16_t *, uint8_t *);
static void configwin(xcb_window_t, uint16_t,const struct winconf *);
static void sigcatch(const int);
static void ewmh_init(void);
static xcb_atom_t getatom(const char *);
static void getmonsize(int8_t, int16_t *, int16_t *, uint16_t *, uint16_t *,const struct client *);
static void noborder(int16_t *,struct client *, bool);
static void movepointerback(const int16_t, const int16_t, const struct client *);
static void snapwindow(struct client *);
#include "config.h"

///---Function bodies---///
void
fix()
{
	fixwindow(focuswin);
}

void
unkillable()
{
	unkillablewindow(focuswin);
}

void
delmonitor(struct monitor *mon)
{
	freeitem(&monlist, NULL, mon->item);
}

void
raise_current_window(void)
{
	raisewindow(focuswin->id);
}

void
focusnext(const Arg *arg)
{
	focusnext_helper(arg->i > 0);
}

void
delfromworkspace(struct client *client)
{
	if(client->ws < 0)
		return;
	delitem(&wslist[client->ws], client->wsitem);
	client->wsitem = NULL;
	client->ws = -1;
}

void
changeworkspace(const Arg *arg)
{
	changeworkspace_helper(arg->i);
}

void
nextworkspace()
{
	curws == WORKSPACES - 1 ? changeworkspace_helper(0)
		:changeworkspace_helper(curws+1);
}

void
prevworkspace()
{
	curws > 0 ? changeworkspace_helper(curws - 1)
		: changeworkspace_helper(WORKSPACES-1);}

void
twobwm_exit()
{
	exit(EXIT_SUCCESS);
}

void
saveorigsize(struct client *client)
{
    client->origsize.x      = client->x;
    client->origsize.y      = client->y;
    client->origsize.width  = client->width;
    client->origsize.height = client->height;
}

void
centerpointer(xcb_drawable_t win, struct client *cl)
{
	int16_t cur_x, cur_y;

	cur_x = cur_y = 0;

	switch(CURSOR_POSITION) {
        case BOTTOM_RIGHT:
		cur_x += cl->width;
        case BOTTOM_LEFT:
		cur_y += cl->height; break;
        case TOP_RIGHT:
		cur_x += cl->width;
        case TOP_LEFT:
		break;
        default:
		cur_x = cl->width / 2;
		cur_y = cl->height / 2;
	}

	xcb_warp_pointer(conn, XCB_NONE, win, 0, 0, 0, 0, cur_x, cur_y);
}

void
updateclientlist(void)
{
	uint32_t len,i;
	xcb_window_t *children;
	struct client *cl;

	/* can only be called after the first window has been spawn */
	xcb_query_tree_reply_t *reply = xcb_query_tree_reply(conn,
			xcb_query_tree(conn, screen->root), 0);
	xcb_delete_property(conn, screen->root, ewmh->_NET_CLIENT_LIST);
	xcb_delete_property(conn, screen->root, ewmh->_NET_CLIENT_LIST_STACKING);

	if (reply == NULL) {
		addtoclientlist(0);
		return;
	}

	len = xcb_query_tree_children_length(reply);
	children = xcb_query_tree_children(reply);

	for (i=0; i < len; i ++) {
		cl = findclient(&children[i]);
		if(cl != NULL)
			addtoclientlist(cl->id);
	}

	free(reply);
}

/* get screen of display */
xcb_screen_t *
xcb_screen_of_display(xcb_connection_t *con, int screen)
{
	xcb_screen_iterator_t iter;
	iter = xcb_setup_roots_iterator(xcb_get_setup(con));
	for (; iter.rem; --screen, xcb_screen_next(&iter))
		if (screen == 0)
			return iter.data;

	return NULL;
}

void
movepointerback(const int16_t startx, const int16_t starty,
		const struct client *client)
{
	if (startx > (0 - conf.borderwidth - 1) && startx < (client->width
				+ conf.borderwidth + 1) && starty > (0
					- conf.borderwidth - 1) && starty
			< (client->height + conf.borderwidth + 1))
		xcb_warp_pointer(conn, XCB_NONE, client->id,0,0,0,0, startx,
				starty);
}

/* Set keyboard focus to follow mouse pointer. Then exit. We don't need to
 * bother mapping all windows we know about. They should all be in the X
 * server's Save Set and should be mapped automagically. */
void
cleanup(void)
{
    free(ev);
    if(monlist)
        delallitems(&monlist,NULL);
    struct item *curr,*wsitem;
    for(int i = 0; i < WORKSPACES; i++){
        if(!wslist[i])
            continue;
        curr = wslist[i];
        while(curr){
            wsitem = curr;
            curr = curr->next;
            free(wsitem);
        }
    }
    if(winlist){
        delallitems(&winlist,NULL);
    }
    if (ewmh != NULL){
	    xcb_ewmh_connection_wipe(ewmh);
		free(ewmh);
    }
    if(!conn){
        return;
    }
	xcb_set_input_focus(conn, XCB_NONE,XCB_INPUT_FOCUS_POINTER_ROOT,
			XCB_CURRENT_TIME);
	xcb_flush(conn);
	xcb_disconnect(conn);
}

/* Rearrange windows to fit new screen size. */
void
arrangewindows(void)
{
	struct client *client;
	struct item *item;
	/* Go through all windows and resize them appropriately to
	 * fit the screen. */

	for (item=winlist; item != NULL; item = item->next) {
		client = item->data;
		fitonscreen(client);
	}
}

uint32_t getwmdesktop(xcb_drawable_t win)
{                                   // Get EWWM hint so we might know what workspace window win should be visible on.
                                    // Returns either workspace, NET_WM_FIXED if this window should be
                                    // visible on all workspaces or TWOBWM_NOWS if we didn't find any hints.
    xcb_get_property_cookie_t cookie = xcb_get_property(conn, false, win, ewmh->_NET_WM_DESKTOP,
        XCB_GET_PROPERTY_TYPE_ANY, 0, sizeof(uint32_t));
    xcb_get_property_reply_t *reply = xcb_get_property_reply(conn, cookie, NULL);
    if (NULL==reply || 0 == xcb_get_property_value_length(reply)) { /* 0 if we didn't find it. */
        if(NULL!=reply) free(reply);
        return TWOBWM_NOWS;
    }
    uint32_t wsp = *(uint32_t *)xcb_get_property_value(reply);
    if(NULL!=reply)free(reply);
    return wsp;
}

/* check if the window is unkillable, if yes return true */
bool
get_unkil_state(xcb_drawable_t win)
{
	xcb_get_property_cookie_t cookie;
	xcb_get_property_reply_t *reply;
	uint8_t wsp;

	cookie = xcb_get_property(conn, false, win, ewmh->_NET_WM_STATE_DEMANDS_ATTENTION,
			XCB_GET_PROPERTY_TYPE_ANY, 0,sizeof(uint8_t));

	reply  = xcb_get_property_reply(conn, cookie, NULL);

	if (reply == NULL || xcb_get_property_value_length(reply) == 0) {
		if(reply != NULL )
			free(reply);
		return false;
	}

	wsp = *(uint8_t *) xcb_get_property_value(reply);

	if (reply != NULL)
		free(reply);

	if (wsp == 1)
		return true;
	else
		return false;
}

void
check_name(struct client *client)
{
	xcb_get_property_reply_t *reply ;
	unsigned int reply_len;
	char *wm_name_window;
	unsigned int i;
	uint32_t values[1] = { 0 };

	if (NULL == client)
		return;

	reply = xcb_get_property_reply(conn, xcb_get_property(conn, false,
				client->id, getatom(LOOK_INTO) ,
				XCB_GET_PROPERTY_TYPE_ANY, 0,60), NULL
	);

	if (reply == NULL || xcb_get_property_value_length(reply) == 0) {
		if (NULL!=reply)
			free(reply);
		return;
	}

	reply_len = xcb_get_property_value_length(reply);
	wm_name_window = malloc(sizeof(char*) * (reply_len+1));;
	memcpy(wm_name_window, xcb_get_property_value(reply), reply_len);
	wm_name_window[reply_len] = '\0';

	if(NULL != reply)
		free(reply);

	for(i=0;i<sizeof(ignore_names)/sizeof(__typeof__(*ignore_names));i++)
		if (strstr(wm_name_window, ignore_names[i]) !=NULL) {
			client->ignore_borders = true;
			xcb_configure_window(conn, client->id,
					XCB_CONFIG_WINDOW_BORDER_WIDTH, values);
			break;
		}

	free(wm_name_window);
}

/* Add a window, specified by client, to workspace ws. */
void
addtoworkspace(struct client *client, uint32_t ws)
{
	struct item *item = additem(&wslist[ws]);

	if (client == NULL)
		return;

	if (NULL == item)
		return;

	/* Remember our place in the workspace window list. */
	client->wsitem = item;
	client->ws = ws;
	item->data         = client;

	/* Set window hint property so we can survive a crash. Like "fixed" */
	if (!client->fixed)
		xcb_change_property(conn, XCB_PROP_MODE_REPLACE, client->id,
				ewmh->_NET_WM_DESKTOP, XCB_ATOM_CARDINAL, 32, 1,
				&ws
		);
}
static void addtoclientlist(const xcb_drawable_t id)
{
    xcb_change_property(conn, XCB_PROP_MODE_APPEND , screen->root, ewmh->_NET_CLIENT_LIST, XCB_ATOM_WINDOW, 32, 1,&id);
    xcb_change_property(conn, XCB_PROP_MODE_APPEND , screen->root, ewmh->_NET_CLIENT_LIST_STACKING, XCB_ATOM_WINDOW, 32, 1,&id);
}

/* Change current workspace to ws */
void
changeworkspace_helper(const uint32_t ws)
{
	xcb_query_pointer_reply_t *pointer;
	struct client *client;
	struct item *item;
	if (ws == curws)
		return;
	xcb_ewmh_set_current_desktop(ewmh, 0, ws);
	/* Go through list of current ws.
	 * Unmap everything that isn't fixed. */
	for (item=wslist[curws]; item != NULL;) {
		client = item->data;
		item = item->next;
		setborders(client,false);
		if (!client->fixed){
			xcb_unmap_window(conn, client->id);
		}else{
			// correct order is delete first add later.
			delfromworkspace(client);
			addtoworkspace(client,ws);
		}
	}
	for (item=wslist[ws]; item != NULL; item = item->next) {
		client = item->data;
		if (!client->fixed && !client->iconic)
			xcb_map_window(conn, client->id);
	}
	curws = ws;
	pointer = xcb_query_pointer_reply(conn, xcb_query_pointer(conn,
				screen->root), 0);
	if(pointer == NULL)
		setfocus(NULL);
	else {
		setfocus(findclient(&pointer->child));
		free(pointer);
	}
}

void
always_on_top()
{
	struct client *cl = NULL;

	if(focuswin==NULL)
		return;

	if(top_win!=focuswin->id) {
		if (0 != top_win) cl = findclient(&top_win);

		top_win = focuswin->id;
		if (NULL!=cl)
			setborders(cl, false);

		raisewindow(top_win);
	} else
		top_win = 0;

	setborders(focuswin,true);
}

/* Fix or unfix a window client from all workspaces. If setcolour is */
void
fixwindow(struct client *client)
{
	uint32_t ws,ww;

	if (NULL == client)
		return;

	if (client->fixed) {
		client->fixed = false;
		xcb_change_property(conn, XCB_PROP_MODE_REPLACE, client->id,
				ewmh->_NET_WM_DESKTOP, XCB_ATOM_CARDINAL, 32, 1,
				&curws
		);
	} else {
		/* Raise the window, if going to another desktop don't
		 * let the fixed window behind. */
		raisewindow(client->id);
		client->fixed = true;
		ww = NET_WM_FIXED;
		xcb_change_property(conn, XCB_PROP_MODE_REPLACE, client->id,
				ewmh->_NET_WM_DESKTOP, XCB_ATOM_CARDINAL, 32, 1,
				&ww
		);
	}

	setborders(client,true);
}

/* Make unkillable or killable a window client. If setcolour is */
void
unkillablewindow(struct client *client)
{
	if (NULL == client)
		return;

	if (client->unkillable) {
		client->unkillable = false;
		xcb_delete_property(conn, client->id, ewmh->_NET_WM_STATE_DEMANDS_ATTENTION);
	} else {
		raisewindow(client->id);
		client->unkillable = true;
		xcb_change_property(conn, XCB_PROP_MODE_REPLACE, client->id,
				ewmh->_NET_WM_STATE_DEMANDS_ATTENTION, XCB_ATOM_CARDINAL, 8, 1,
				&client->unkillable
		);
	}

	setborders(client,true);
}

void
sendtoworkspace(const Arg *arg)
{
    if (NULL == focuswin||focuswin->fixed||arg->i == curws)
	    return;
	// correct order is delete first add later.
    delfromworkspace(focuswin);
    addtoworkspace(focuswin, arg->i);
    xcb_unmap_window(conn, focuswin->id);
    xcb_flush(conn);
}

void
sendtonextworkspace(const Arg *arg)
{
	Arg arg2 = { .i=0 };
	Arg arg3 = { .i=curws + 1 };
	curws == WORKSPACES - 1 ? sendtoworkspace(&arg2):sendtoworkspace(&arg3);
}

void
sendtoprevworkspace(const Arg *arg)
{
	Arg arg2 = {.i=curws-1};
	Arg arg3 = {.i=WORKSPACES-1};
	curws > 0 ? sendtoworkspace(&arg2) : sendtoworkspace(&arg3);
}

/* Get the pixel values of a named colour colstr. Returns pixel values. */
uint32_t
getcolor(const char *hex)
{
	uint32_t rgb48;
	char strgroups[7] = {
		hex[1], hex[2], hex[3], hex[4], hex[5], hex[6], '\0'
	};

	rgb48 = strtol(strgroups, NULL, 16);
	return rgb48 | 0xff000000;
}

/* Forget everything about client client. */
void
forgetclient(struct client *client)
{
	uint32_t ws;

	if (NULL == client)
		return;
	if (client->id == top_win)
		top_win = 0;
	if (client->id == dock_win)
		dock_win = 0;
	/* Delete client from the workspace list it belongs to. */
	delfromworkspace(client);

	/* Remove from global window list. */
	freeitem(&winlist, NULL, client->winitem);
}

/* Forget everything about a client with client->id win. */
void
forgetwin(xcb_window_t win)
{
	struct client *client;
	struct item *item;

	for (item = winlist; item != NULL; item = item->next) {
		/* Find this window in the global window list. */
		client = item->data;
		if (win == client->id) {
			/* Forget it and free allocated data, it might
			 * already be freed by handling an UnmapNotify. */
			forgetclient(client);
			return;
		}
	}
}

void
getmonsize(int8_t with_offsets, int16_t *mon_x, int16_t *mon_y,
		uint16_t *mon_width, uint16_t *mon_height,
		const struct client *client)
{
	if (NULL == client || NULL == client->monitor) {
		/* Window isn't attached to any monitor, so we use
		 * the root window size. */
		*mon_x      = *mon_y = 0;
		*mon_width  = screen->width_in_pixels;
		*mon_height = screen->height_in_pixels;
	} else {
		*mon_x      = client->monitor->x;
		*mon_y      = client->monitor->y;
		*mon_width  = client->monitor->width;
		*mon_height = client->monitor->height;
	}

	if (with_offsets) {
		*mon_x      += offsets[0];
		*mon_y      += offsets[1];
		*mon_width  -= offsets[2];
		*mon_height -= offsets[3];
	}
}

void
noborder(int16_t *temp,struct client *client, bool set_unset)
{
	if (client->ignore_borders) {
		if (set_unset) {
			*temp            = conf.borderwidth;
			conf.borderwidth = 0;
		} else
			conf.borderwidth = *temp;
	}
}
void
maximize_helper(struct client *client,uint16_t mon_x, uint16_t mon_y,
		uint16_t mon_width, uint16_t mon_height)
{
	uint32_t values[4];

	values[0] = 0;
	saveorigsize(client);
	xcb_configure_window(conn, client->id, XCB_CONFIG_WINDOW_BORDER_WIDTH,
			values);

	client->x = mon_x;
	client->y = mon_y;
	client->width = mon_width;
	client->height = mon_height;

	moveresize(client->id, client->x, client->y, client->width,
			client->height);
	client->maxed = true;
}

/* Fit client on physical screen, moving and resizing as necessary. */
void
fitonscreen(struct client *client)
{
	int16_t mon_x, mon_y,temp=0;
	uint16_t mon_width, mon_height;
	bool willmove,willresize;

	willmove = willresize = client->vertmaxed = client->hormaxed = false;

	getmonsize(1, &mon_x, &mon_y, &mon_width, &mon_height,client);

	if (client->maxed) {
		client->maxed = false;
		setborders(client,false);
	} else {
		/* not maxed but look as if it was maxed, then make it maxed */
		if (client->width==mon_width && client->height==mon_height)
			willresize = true;
		else {
			getmonsize(0, &mon_x, &mon_y, &mon_width, &mon_height,
					client);
			if (client->width == mon_width && client->height
					== mon_height)
				willresize = true;
		}
		if (willresize) {
			client->x = mon_x;
			client->y = mon_y;
			client->width -= conf.borderwidth * 2;
			client->height-= conf.borderwidth * 2;
			maximize_helper(client, mon_x, mon_y, mon_width,
					mon_height);
			return;
		} else {
			getmonsize(1, &mon_x, &mon_y, &mon_width,
					&mon_height,client);
		}
	}

	if (client->x > mon_x + mon_width || client->y > mon_y + mon_height
			|| client->x < mon_x||client->y < mon_y) {
		willmove = true;
		/* Is it outside the physical monitor? */
		if (client->x > mon_x + mon_width)
			client->x = mon_x + mon_width
				- client->width-conf.borderwidth*2;
	if (client->y > mon_y + mon_height)
		client->y = mon_y + mon_height - client->height
			- conf.borderwidth*2;
	if (client->x < mon_x)
		client->x = mon_x;
	if (client->y < mon_y)
		client->y = mon_y;
	}

	/* Is it smaller than it wants to  be? */
	if (0 != client->min_height && client->height < client->min_height) {
		client->height = client->min_height;

	willresize = true;
	}

	if (0 != client->min_width && client->width < client->min_width) {
		client->width = client->min_width;
		willresize = true;
	}

	noborder(&temp, client, true);
	/* If the window is larger than our screen, just place it in
	 * the corner and resize. */
	if (client->width + conf.borderwidth * 2 > mon_width) {
		client->x = mon_x;
		client->width = mon_width - conf.borderwidth * 2;;
		willmove = willresize = true;
	} else
		if (client->x + client->width + conf.borderwidth * 2
				> mon_x + mon_width) {
			client->x = mon_x + mon_width - (client->width
					+ conf.borderwidth * 2);
			willmove = true;
		}
	if (client->height + conf.borderwidth * 2 > mon_height) {
		client->y = mon_y;
		client->height = mon_height - conf.borderwidth * 2;
		willmove = willresize = true;
	} else
		if (client->y + client->height + conf.borderwidth*2 > mon_y
				+ mon_height) {
			client->y = mon_y + mon_height - (client->height
					+ conf.borderwidth * 2);
			willmove = true;
		}

	if (willmove)
		movewindow(client->id, client->x, client->y);

	if (willresize)
		resize(client->id, client->width, client->height);

	noborder( &temp, client, false);
}


/* Set position, geometry and attributes of a new window and show it on
 * the screen.*/
void
newwin(xcb_generic_event_t *ev)
{
	xcb_map_request_event_t *e = (xcb_map_request_event_t *) ev;
	struct client *client;
	long data[] = {
		XCB_ICCCM_WM_STATE_NORMAL,
		XCB_NONE
	};


	/* The window is trying to map itself on the current workspace,
	 * but since it's unmapped it probably belongs on another workspace.*/
	if (NULL != findclient(&e->window))
		return;

	client = setupwin(e->window);

	if (NULL == client)
		return;

	/* Add this window to the current workspace. */
	addtoworkspace(client, curws);

	/* If we don't have specific coord map it where the pointer is.*/
	if (!client->usercoord) {
		if (!getpointer(&screen->root, &client->x, &client->y))
			client->x = client->y = 0;

		client->x -= client->width/2;    client->y -= client->height/2;
		movewindow(client->id, client->x, client->y);
	}

	/* Find the physical output this window will be on if RANDR is active */
	if (-1 != randrbase) {
		client->monitor = findmonbycoord(client->x, client->y);
		if (NULL == client->monitor && NULL != monlist)
			/* Window coordinates are outside all physical monitors.
			 * Choose the first screen.*/
			client->monitor = monlist->data;
	}

	fitonscreen(client);

	/* Show window on screen. */
	xcb_map_window(conn, client->id);
	xcb_change_property(conn, XCB_PROP_MODE_REPLACE, client->id,
			ewmh->_NET_WM_STATE, ewmh->_NET_WM_STATE, 32, 2, data);

	centerpointer(e->window,client);
	updateclientlist();

	if (!client->maxed)
		setborders(client,true);
	// always focus new window
	setfocus(client);
}

/* Set border colour, width and event mask for window. */
struct client *
setupwin(xcb_window_t win)
{
	unsigned int i;
	uint8_t result;
	uint32_t values[2],ws;
	xcb_atom_t a;
	xcb_size_hints_t hints;
	xcb_ewmh_get_atoms_reply_t win_type;
	xcb_window_t prop;
	struct item *item;
	struct client *client;
	xcb_get_property_cookie_t cookie;


	if (xcb_ewmh_get_wm_window_type_reply(ewmh,
		xcb_ewmh_get_wm_window_type(ewmh, win), &win_type, NULL) == 1) {
		for (i = 0; i < win_type.atoms_len; i++) {
			a = win_type.atoms[i];
			if (a == ewmh->_NET_WM_WINDOW_TYPE_TOOLBAR || a
					== ewmh->_NET_WM_WINDOW_TYPE_DOCK || a
					== ewmh->_NET_WM_WINDOW_TYPE_DESKTOP ) {
				xcb_map_window(conn,win);
				dock_win = win;
				return NULL;
			}
		}
		xcb_ewmh_get_atoms_reply_wipe(&win_type);
	}
	values[0] = XCB_EVENT_MASK_ENTER_WINDOW;
	xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXEL,
			&conf.empty_col);
	xcb_change_window_attributes_checked(conn, win, XCB_CW_EVENT_MASK,
			values);

	/* Add this window to the X Save Set. */
	xcb_change_save_set(conn, XCB_SET_MODE_INSERT, win);

	/* Remember window and store a few things about it. */
	item = additem(&winlist);

	if (NULL == item)
		return NULL;

	client = malloc(sizeof(struct client));

	if (NULL == client)
		return NULL;

	item->data = client;
	client->id = win;
	client->x = client->y = client->width = client->height
		= client->min_width = client->min_height = client->base_width
		= client->base_height = 0;

	client->max_width     = screen->width_in_pixels;
	client->max_height    = screen->height_in_pixels;
	client->width_inc     = client->height_inc = 1;
	client->usercoord     = client->vertmaxed = client->hormaxed
		= client->maxed = client->unkillable= client->fixed
		= client->ignore_borders= client->iconic= false;

	client->monitor       = NULL;
	client->winitem       = item;

	/* Initialize workspace pointers. */
	client->wsitem = NULL;
	client->ws = -1;

	/* Get window geometry. */
	getgeom(&client->id, &client->x, &client->y, &client->width,
			&client->height, &client->depth);

	/* Get the window's incremental size step, if any.*/
	xcb_icccm_get_wm_normal_hints_reply(conn,
			xcb_icccm_get_wm_normal_hints_unchecked(conn, win),
			&hints, NULL
	);

	/* The user specified the position coordinates.
	 * Remember that so we can use geometry later. */
	if (hints.flags &XCB_ICCCM_SIZE_HINT_US_POSITION)
		client->usercoord = true;

	if (hints.flags &XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
		client->min_width  = hints.min_width;
		client->min_height = hints.min_height;
	}

	if (hints.flags &XCB_ICCCM_SIZE_HINT_P_MAX_SIZE) {
		client->max_width  = hints.max_width;
		client->max_height = hints.max_height;
	}

	if (hints.flags &XCB_ICCCM_SIZE_HINT_P_RESIZE_INC) {
		client->width_inc  = hints.width_inc;
		client->height_inc = hints.height_inc;
	}

	if (hints.flags &XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
		client->base_width  = hints.base_width;
		client->base_height = hints.base_height;
	}
	cookie = xcb_icccm_get_wm_transient_for_unchecked(conn, win);
	if (cookie.sequence > 0) {
		result = xcb_icccm_get_wm_transient_for_reply(conn, cookie, &prop, NULL);
		if (result) {
			xcb_get_geometry_reply_t *parent = xcb_get_geometry_reply(conn,
					xcb_get_geometry(conn, prop), NULL);

			if (parent) {
				client->usercoord = true;
				client->x = parent->x+(parent->width/2.0) - (client->width/2.0);
				client->y = parent->y+(parent->height/2.0) - (client->height/2.0);
				moveresize(client->id, client->x, client->y,
						client->width, client->height);
				free(parent);
				xcb_flush(conn);
			}
		}
	}

	check_name(client);
	return client;
}

/* wrapper to get xcb keycodes from keysymbol */
xcb_keycode_t *
xcb_get_keycodes(xcb_keysym_t keysym)
{
	xcb_key_symbols_t *keysyms;
	xcb_keycode_t *keycode;

	if (!(keysyms = xcb_key_symbols_alloc(conn)))
		return NULL;

	keycode = xcb_key_symbols_get_keycode(keysyms, keysym);
	xcb_key_symbols_free(keysyms);

	return keycode;
}

/* the wm should listen to key presses */
void
grabkeys(void)
{
	xcb_keycode_t *keycode;
	int i,k,m;
	unsigned int modifiers[] = {
		0,
		XCB_MOD_MASK_LOCK,
		numlockmask,
		numlockmask | XCB_MOD_MASK_LOCK
	};

	xcb_ungrab_key(conn, XCB_GRAB_ANY, screen->root, XCB_MOD_MASK_ANY);

	for (i=0; i<LENGTH(keys); i++) {
		keycode = xcb_get_keycodes(keys[i].keysym);

	for (k=0; keycode[k] != XCB_NO_SYMBOL; k++)
		for (m=0; m<LENGTH(modifiers); m++)
			xcb_grab_key(conn, 1, screen->root, keys[i].mod
					| modifiers[m], keycode[k],
					XCB_GRAB_MODE_ASYNC,//pointer mode
					XCB_GRAB_MODE_ASYNC //keyboard mode
			);
	free(keycode); // allocated in xcb_get_keycodes()
	}
}

bool
setup_keyboard(void)
{
	xcb_get_modifier_mapping_reply_t *reply;
	xcb_keycode_t *modmap, *numlock;
	unsigned int i,j,n;

	reply = xcb_get_modifier_mapping_reply(conn,
				xcb_get_modifier_mapping_unchecked(conn), NULL);

	if (!reply)
		return false;

	modmap = xcb_get_modifier_mapping_keycodes(reply);

	if (!modmap)
		return false;

	numlock = xcb_get_keycodes(XK_Num_Lock);

	for (i=4; i<8; i++) {
		for (j=0; j<reply->keycodes_per_modifier; j++) {
			xcb_keycode_t keycode = modmap[i
				* reply->keycodes_per_modifier + j];

			if (keycode == XCB_NO_SYMBOL)
				continue;

			if(numlock != NULL)
				for (n=0; numlock[n] != XCB_NO_SYMBOL; n++)
					if (numlock[n] == keycode) {
						numlockmask = 1 << i;
						break;
					}
		}
	}

	free(reply);
	free(numlock);

	return true;
}

/* Walk through all existing windows and set them up. returns true on success */
bool
setupscreen(void)
{
	xcb_get_window_attributes_reply_t *attr;
	struct client *client;
	uint32_t ws;
	uint32_t len;
	xcb_window_t *children;
	uint32_t i;

	/* Get all children. */
	xcb_query_tree_reply_t *reply = xcb_query_tree_reply(conn,
			xcb_query_tree(conn, screen->root), 0);

	if (NULL == reply)
		return false;

	len = xcb_query_tree_children_length(reply);
	children = xcb_query_tree_children(reply);

	/* Set up all windows on this root. */
	for (i=0; i < len; i ++) {
		attr = xcb_get_window_attributes_reply(conn,
				xcb_get_window_attributes(conn, children[i]),
				NULL
		);

	if (!attr)
		continue;

        /* Don't set up or even bother windows in override redirect mode.
	 * This mode means they wouldn't have been reported to us with a
	 * MapRequest if we had been running, so in the normal case we wouldn't
	 * have seen them. Only handle visible windows. */
        if (!attr->override_redirect && attr->map_state
			== XCB_MAP_STATE_VIEWABLE) {
		client = setupwin(children[i]);

		if (NULL != client) {
			/* Find the physical output this window will be on if
			 * RANDR is active. */
			if (-1 != randrbase)
				client->monitor = findmonbycoord(client->x,
						client->y);
			/* Fit window on physical screen. */
			fitonscreen(client);
			setborders(client, false);

			/* Check if this window has a workspace set already
			 * as a WM hint. */
			ws = getwmdesktop(children[i]);

			if (get_unkil_state(children[i]))
				unkillablewindow(client);

			if (ws == NET_WM_FIXED) {
				/* Add to current workspace. */
				addtoworkspace(client, curws);
				/* Add to all other workspaces. */
				fixwindow(client);
			} else {
				if (TWOBWM_NOWS != ws && ws < WORKSPACES) {
					addtoworkspace(client, ws);
					if (ws != curws)
						/* If it's not our current works
						 * pace, hide it. */
						xcb_unmap_window(conn,
								client->id);
				} else {
					addtoworkspace(client, curws);
					addtoclientlist(children[i]);
				}
			}
		}
	}

	if(NULL != attr)
		free(attr);

	}
	changeworkspace_helper(0);

	if(NULL!=reply)
		free(reply);

	return true;
}

/* Set up RANDR extension. Get the extension base and subscribe to events */
int
setuprandr(void)
{
	int base;
	const xcb_query_extension_reply_t *extension
		= xcb_get_extension_data(conn, &xcb_randr_id);

	if (!extension->present)
		return -1;
	else
		getrandr();

	base = extension->first_event;
	xcb_randr_select_input(conn, screen->root,
			XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE
			| XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE
			| XCB_RANDR_NOTIFY_MASK_CRTC_CHANGE
			| XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY
	);

	return base;
}

/* Get RANDR resources and figure out how many outputs there are. */
void
getrandr(void)
{
	int len;
	xcb_randr_get_screen_resources_current_cookie_t rcookie
		= xcb_randr_get_screen_resources_current(conn, screen->root);
	xcb_randr_get_screen_resources_current_reply_t *res
		= xcb_randr_get_screen_resources_current_reply(conn, rcookie,
				NULL);

	if (NULL == res)
		return;

	xcb_timestamp_t timestamp = res->config_timestamp;
	len= xcb_randr_get_screen_resources_current_outputs_length(res);
	xcb_randr_output_t *outputs
		= xcb_randr_get_screen_resources_current_outputs(res);

	/* Request information for all outputs. */
	getoutputs(outputs, len, timestamp);
	free(res);
}

/* Walk through all the RANDR outputs (number of outputs == len) there */
void
getoutputs(xcb_randr_output_t *outputs, const int len,
		xcb_timestamp_t timestamp)
{
	int i;
	int name_len;
	char *name;

	/* was at time timestamp. */
	xcb_randr_get_crtc_info_cookie_t icookie;
	xcb_randr_get_crtc_info_reply_t *crtc = NULL;
	xcb_randr_get_output_info_reply_t *output;
	struct monitor *mon, *clonemon;
	struct item *item;
	xcb_randr_get_output_info_cookie_t ocookie[len];

	for (i = 0; i < len; i++)
		ocookie[i] = xcb_randr_get_output_info(conn, outputs[i],
				timestamp);

	/* Loop through all outputs. */
	for (i = 0; i < len; i ++) {
		if ((output = xcb_randr_get_output_info_reply(conn, ocookie[i],
				NULL)) == NULL)
			continue;

	//name_len = MIN(16, xcb_randr_get_output_info_name_length(output));
	//name = malloc(name_len+1);
	//snprintf(name, name_len+1, "%.*s", name_len,
	//		xcb_randr_get_output_info_name(output));

	if (XCB_NONE != output->crtc) {
		icookie = xcb_randr_get_crtc_info(conn, output->crtc,
				timestamp);
		crtc = xcb_randr_get_crtc_info_reply(conn, icookie, NULL);

		if (NULL == crtc)
			return;

		/* Check if it's a clone. */
		// TODO maybe they are not cloned, one might be bigger
		// than the other after closing the lid
		clonemon = findclones(outputs[i], crtc->x, crtc->y);

		if (NULL != clonemon)
			continue;

		/* Do we know this monitor already? */
		if (NULL == (mon = findmonitor(outputs[i])))
			addmonitor(outputs[i], crtc->x, crtc->y,
					crtc->width,crtc->height);
		else
			/* We know this monitor. Update information.
			 * If it's smaller than before, rearrange windows. */
			if ( crtc->x != mon->x||crtc->y != mon->y||crtc->width
					!= mon->width||crtc->height
					!= mon->height) {
				if (crtc->x != mon->x)
					mon->x = crtc->x;
				if (crtc->y != mon->y)
					mon->y = crtc->y;
				if (crtc->width != mon->width)
					mon->width = crtc->width;
				if (crtc->height != mon->height)
					mon->height = crtc->height;

				// TODO when lid closed, one screen
				arrbymon(mon);
			}
		free(crtc);
	} else {
		/* Check if it was used before. If it was, do something. */
		if ((mon = findmonitor(outputs[i]))) {
			struct client *client;
			for (item = winlist; item != NULL; item = item->next) {
				/* Check all windows on this monitor
				 * and move them to the next or to the
				 * first monitor if there is no next. */
				client = item->data;

				if (client->monitor == mon) {
					if (NULL == client->monitor->item->next)
						if (NULL == monlist)
							client->monitor = NULL;
						else
							client->monitor = monlist->data;
					else
						client->monitor = client->monitor->item->next->data;
					fitonscreen(client);
				}
			}

			/* It's not active anymore. Forget about it. */
			delmonitor(mon);
		}
	}
	if (NULL != output)
		free(output);

	free(name);
	} /* for */
}

void
arrbymon(struct monitor *monitor)
{
	struct client *client;
	struct item *item;

	for (item = winlist; item != NULL; item = item->next) {
		client = item->data;

		if (client->monitor == monitor)
			fitonscreen(client);
	}
}

struct monitor *
findmonitor(xcb_randr_output_t id)
{
	struct monitor *mon;
	struct item *item;

	for (item = monlist; item != NULL; item = item->next) {
		mon = item->data;

		if (id == mon->id)
			return mon;
	}

	return NULL;
}

struct monitor *
findclones(xcb_randr_output_t id, const int16_t x, const int16_t y)
{
	struct monitor *clonemon;
	struct item *item;

	for (item = monlist; item != NULL; item = item->next) {
		clonemon = item->data;

		/* Check for same position. */
		if (id != clonemon->id && clonemon->x == x && clonemon->y == y)
			return clonemon;
	}

	return NULL;
}

struct monitor *
findmonbycoord(const int16_t x, const int16_t y)
{
	struct monitor *mon;
	struct item *item;

	for (item = monlist; item != NULL; item = item->next) {
		mon = item->data;

		if (x>=mon->x && x <= mon->x + mon->width && y >= mon->y && y
				<= mon->y+mon->height)
			return mon;
	}

	return NULL;
}

struct monitor *
addmonitor(xcb_randr_output_t id, const int16_t x, const int16_t y,
		const uint16_t width,const uint16_t height)
{
	struct item *item;
	struct monitor *mon = malloc(sizeof(struct monitor));

	if (NULL == (item = additem(&monlist)))
		return NULL;

	if (NULL == mon)
		return NULL;

	item->data  = mon;
	mon->id     = id;
	mon->item   = item;
	mon->x      = x;
	mon->y      = y;
	mon->width  = width;
	mon->height = height;

	return mon;
}

/* Raise window win to top of stack. */
void
raisewindow(xcb_drawable_t win)
{
	uint32_t values[] = { XCB_STACK_MODE_ABOVE };

	if (screen->root == win || 0 == win)
		return;

	xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
	xcb_flush(conn);
}

/* Set window client to either top or bottom of stack depending on
 * where it is now. */
void
raiseorlower()
{
	uint32_t values[] = { XCB_STACK_MODE_OPPOSITE };

	if (NULL == focuswin)
		return;

	xcb_configure_window(conn, focuswin->id,XCB_CONFIG_WINDOW_STACK_MODE,
			values);

	xcb_flush(conn);
}

/* Keep the window inside the screen */
void
movelim(struct client *client)
{
	int16_t mon_y, mon_x,temp=0;
	uint16_t mon_height, mon_width;

	getmonsize(1, &mon_x, &mon_y, &mon_width, &mon_height, client);
	noborder(&temp, client, true);

	/* Is it outside the physical monitor or close to the side? */
	if (client->y-conf.borderwidth < mon_y
		|| client->y < borders[2] + mon_y)
		client->y = mon_y;
	else if (client->y + client->height + (conf.borderwidth * 2) > mon_y
			+ mon_height - borders[2])
		client->y = mon_y + mon_height - client->height
			- conf.borderwidth * 2;

	if (client->x < borders[2] + mon_x)
		client->x = mon_x;
	else if (client->x + client->width + (conf.borderwidth * 2)
			> mon_x + mon_width - borders[2])
		client->x = mon_x + mon_width - client->width
			- conf.borderwidth * 2;

	movewindow(client->id, client->x, client->y);
	noborder(&temp, client, false);
}

void
movewindow(xcb_drawable_t win, const int16_t x, const int16_t y)
{                                    // Move window win to root coordinates x,y.
	uint32_t values[2] = {x, y};

	if (screen->root == win || 0 == win)
		return;

	xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_X
			| XCB_CONFIG_WINDOW_Y, values);

	xcb_flush(conn);
}
void
focusnext_helper(bool arg)
{
	struct client *cl = NULL;
	struct item *head = wslist[curws];
	struct item *tail,*item = NULL;
    // no windows on current workspace
    if (NULL == head)
		return;
	// if no focus on current workspace, find first valid item on list.
    if (NULL == focuswin || focuswin->ws != curws) {
		for(item = head;item != NULL;item = item->next){
			cl = item->data;
			if(!cl->iconic)
				break;
		}
    }else{
		// find tail of list and make list circular.
		for(tail = head = item = wslist[curws]; item != NULL;
			tail = item,item = item->next);
		head->prev = tail;
		tail->next = head;
		if (arg == TWOBWM_FOCUS_NEXT) {
			// start from focus next and find first valid item on circular list.
			head = item = focuswin->wsitem->next;
			do{
				cl = item->data;
				if(!cl->iconic)
					break;
				item = item->next;
			}while(item != head);
		}else{
			// start from focus previous and find first valid on circular list.
			tail = item = focuswin->wsitem->prev;
			do{
				cl = item->data;
				if(!cl->iconic)
					break;
				item = item->prev;
			}while(item != tail);
		}
		// restore list.
		wslist[curws]->prev->next = NULL;
		wslist[curws]->prev = NULL;
	}
	if(!item || !(cl = item->data) || cl->iconic)
		return;
	raisewindow(cl->id);
	centerpointer(cl->id,cl);
	setfocus(cl);
}
/* Mark window win as unfocused. */
void setunfocus(void)
{
//    xcb_set_input_focus(conn, XCB_NONE, XCB_INPUT_FOCUS_NONE,XCB_CURRENT_TIME);
	if (NULL == focuswin||focuswin->id == screen->root)
		return;

	setborders(focuswin,false);
}

/* Find client with client->id win in global window list or NULL. */
struct client *
findclient(const xcb_drawable_t *win)
{
	struct client *client;
	struct item *item;

	for (item = winlist; item != NULL; item = item->next) {
		client = item->data;

		if (*win == client->id){
			return client;
		}
	}

	return NULL;
}

void
setfocus(struct client *client)// Set focus on window client.
{
	long data[] = { XCB_ICCCM_WM_STATE_NORMAL, XCB_NONE };

	/* If client is NULL, we focus on whatever the pointer is on.
	 * This is a pathological case, but it will make the poor user able
	 * to focus on windows anyway, even though this windowmanager might
	 * be buggy. */
	if (NULL == client) {
		focuswin = NULL;
		xcb_set_input_focus(conn, XCB_NONE,
				XCB_INPUT_FOCUS_POINTER_ROOT, XCB_CURRENT_TIME);
		xcb_window_t not_win = 0;
		xcb_change_property(conn, XCB_PROP_MODE_REPLACE, screen->root,
				ewmh->_NET_ACTIVE_WINDOW, XCB_ATOM_WINDOW, 32, 1,
				&not_win);

		xcb_flush(conn);
		return;
	}

	/* Don't bother focusing on the root window or on the same window
	 * that already has focus. */
	if (client->id == screen->root)
		return;

	if (NULL != focuswin)
		setunfocus(); /* Unset last focus. */

	xcb_change_property(conn, XCB_PROP_MODE_REPLACE, client->id,
			ewmh->_NET_WM_STATE, ewmh->_NET_WM_STATE, 32, 2, data);
	xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, client->id,
			XCB_CURRENT_TIME); /* Set new input focus. */
	xcb_change_property(conn, XCB_PROP_MODE_REPLACE, screen->root,
			ewmh->_NET_ACTIVE_WINDOW, XCB_ATOM_WINDOW, 32, 1,&client->id);

	/* Remember the new window as the current focused window. */
	focuswin = client;

	grabbuttons(client);
	setborders(client,true);
}

void
start(const Arg *arg)
{
	if (fork())
		return;

//	if (conn)
//		close(screen->root);

	setsid();
	execvp((char*)arg->com[0], (char**)arg->com);
}

/* Resize with limit. */
void
resizelim(struct client *client)
{
	int16_t mon_x, mon_y,temp=0;
	uint16_t mon_width, mon_height;

	getmonsize(1,  &mon_x, &mon_y, &mon_width, &mon_height, client);
	noborder(&temp, client, true);

	/* Is it smaller than it wants to  be? */
	if (0 != client->min_height && client->height < client->min_height)
		client->height = client->min_height;
	if (0 != client->min_width && client->width < client->min_width)
		client->width = client->min_width;
	if (client->x + client->width + conf.borderwidth  > mon_x + mon_width)
		client->width = mon_width - ((client->x - mon_x)
				+ conf.borderwidth * 2);
	if (client->y + client->height + conf.borderwidth > mon_y + mon_height)
		client->height = mon_height - ((client->y - mon_y)
				+ conf.borderwidth * 2);

	resize(client->id, client->width, client->height);
	noborder(&temp, client, false);
}

void
moveresize(xcb_drawable_t win, const uint16_t x, const uint16_t y,
		const uint16_t width, const uint16_t height)
{
	uint32_t values[4] = { x, y, width, height };

	if (screen->root == win || 0 == win)
		return;

	xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_X
			| XCB_CONFIG_WINDOW_Y | XCB_CONFIG_WINDOW_WIDTH
			| XCB_CONFIG_WINDOW_HEIGHT, values);

	xcb_flush(conn);
}

/* Resize window win to width,height. */
void
resize(xcb_drawable_t win, const uint16_t width, const uint16_t height)
{
	uint32_t values[2] = { width , height };

	if (screen->root == win || 0 == win)
		return;

	xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_WIDTH
			| XCB_CONFIG_WINDOW_HEIGHT, values);

	xcb_flush(conn);
}

/* Resize window client in direction. */
void
resizestep(const Arg *arg)
{
	uint8_t stepx,stepy,cases = arg->i % 4;

	if (NULL == focuswin || focuswin->maxed)
		return;

	arg->i < 4 ? (stepx = stepy = movements[1])
		: (stepx = stepy = movements[0]);

	if (focuswin->width_inc > 7 && focuswin->height_inc > 7) {
		/* we were given a resize hint by the window so use it */
		stepx = focuswin->width_inc;
		stepy = focuswin->height_inc;
	}

	if (cases == TWOBWM_RESIZE_LEFT)
		focuswin->width = focuswin->width - stepx;
	else if (cases == TWOBWM_RESIZE_DOWN)
		focuswin->height = focuswin->height + stepy;
	else if (cases == TWOBWM_RESIZE_UP)
		focuswin->height = focuswin->height - stepy;
	else if (cases == TWOBWM_RESIZE_RIGHT)
		focuswin->width = focuswin->width + stepx;

	if (focuswin->vertmaxed)
		focuswin->vertmaxed = false;
	if (focuswin->hormaxed)
		focuswin->hormaxed  = false;

	resizelim(focuswin);
	centerpointer(focuswin->id,focuswin);
	raise_current_window();
	setborders(focuswin,true);
}

/* Resize window and keep it's aspect ratio (exponentially grow),
 * and round the result (+0.5) */
void
resizestep_aspect(const Arg *arg)
{
	if (NULL == focuswin || focuswin->maxed)
		return;

	if (arg->i == TWOBWM_RESIZE_KEEP_ASPECT_SHRINK) {
		focuswin->width = (focuswin->width / resize_keep_aspect_ratio)
			+0.5;
		focuswin->height = (focuswin->height / resize_keep_aspect_ratio)
			+0.5;
	} else {
		focuswin->height = (focuswin->height * resize_keep_aspect_ratio)
			+0.5;
		focuswin->width = (focuswin->width * resize_keep_aspect_ratio)
			+0.5;
	}

	if (focuswin->vertmaxed)
		focuswin->vertmaxed = false;
	if (focuswin->hormaxed)
		focuswin->hormaxed  = false;

	resizelim(focuswin);
	centerpointer(focuswin->id,focuswin);
	raise_current_window();
	setborders(focuswin,true);
}

/* Try to snap to other windows and monitor border */
static void
snapwindow(struct client *client)
{
	struct item *item;
	struct client *win;
	int16_t mon_x, mon_y;
	uint16_t mon_width, mon_height;

	getmonsize(1, &mon_x,&mon_y,&mon_width,&mon_height,focuswin);

	for (item = wslist[curws]; item != NULL; item = item->next) {
		win = item->data;

		if (client != win) {
			if (abs((win->x +win->width) - client->x
					+ conf.borderwidth) < borders[2])
				if (client->y + client->height > win->y
						&& client->y < win->y
						+ win->height)
					client->x = (win->x + win->width)
						+ (2 * conf.borderwidth);

			if (abs((win->y + win->height) - client->y
					+ conf.borderwidth)
					< borders[2])
				if (client->x + client->width >win->x
						&& client->x < win->x
						+ win->width)
					client->y = (win->y + win->height)
						+ (2 * conf.borderwidth);

			if (abs((client->x + client->width) - win->x
					+ conf.borderwidth)
					< borders[2])
				if (client->y + client->height > win->y
						&& client->y < win->y
						+ win->height)
					client->x = (win->x - client->width)
						- (2 * conf.borderwidth);

			if (abs((client->y + client->height) - win->y
					+ conf.borderwidth)
					< borders[2])
				if (client->x + client->width >win->x
						&& client->x < win->x
						+ win->width)
					client->y = (win->y - client->height)
						- (2 * conf.borderwidth);
		}
	}
}

/* Move window win as a result of pointer motion to coordinates rel_x,rel_y. */
void
mousemove(const int16_t rel_x, const int16_t rel_y)
{
	if (focuswin == NULL || focuswin->ws != curws)
		return;

	focuswin->x = rel_x;
	focuswin->y = rel_y;

	if (borders[2] > 0)
		snapwindow(focuswin);

	movelim(focuswin);
}

void
mouseresize(struct client *client, const int16_t rel_x, const int16_t rel_y)
{
	if(focuswin->id == screen->root || focuswin->maxed)
		return;

	client->width  = abs(rel_x);
	client->height = abs(rel_y);

	if (resize_by_line) {
		client->width -= (client->width - client->base_width)
			% client->width_inc;
		client->height -= (client->height - client->base_height)
			% client->height_inc;
	}

	resizelim(client);
	client->vertmaxed = false;
	client->hormaxed  = false;
}

void
movestep(const Arg *arg)
{
	int16_t start_x, start_y;
	uint8_t step, cases=arg->i;

	if (NULL == focuswin||focuswin->maxed)
		return;

	/* Save pointer position so we can warp pointer here later. */
	if (!getpointer(&focuswin->id, &start_x, &start_y))
		return;

	cases = cases%4;
	arg->i < 4 ? (step = movements[1]) : (step = movements[0]);

	if (cases == TWOBWM_MOVE_LEFT)
		focuswin->x = focuswin->x - step;
	else if (cases == TWOBWM_MOVE_DOWN)
		focuswin->y = focuswin->y + step;
	else if (cases == TWOBWM_MOVE_UP)
		focuswin->y = focuswin->y - step;
	else if (cases == TWOBWM_MOVE_RIGHT)
		focuswin->x = focuswin->x + step;

	raise_current_window();
	movelim(focuswin);
	movepointerback(start_x,start_y,focuswin);
	xcb_flush(conn);
}

void
setborders(struct client *client,const bool isitfocused)
{
	uint32_t values[1];  /* this is the color maintainer */
	uint16_t half = 0;
	bool inv = conf.inverted_colors;

	// something weird happened, fix client
	if (client->width == 0 || client->height == 0) {
		// restore from geometry
		getgeom(&client->id, &client->x, &client->y, &client->width,
			&client->height, &client->depth);
		resize(client->id, client->width, client->height);
		xcb_flush(conn);
	}

	if (client->maxed || client->ignore_borders)
		return;

	/* Set border width. */
	values[0] = conf.borderwidth;
	xcb_configure_window(conn, client->id,
			XCB_CONFIG_WINDOW_BORDER_WIDTH, values);

	if (top_win!=0 &&client->id ==top_win)
		inv = !inv;

	half = conf.outer_border;

	xcb_rectangle_t rect_inner[] = {
		{
			client->width,
			0,
			conf.borderwidth - half,client->height
				+ conf.borderwidth - half
		},
		{
			client->width + conf.borderwidth + half,
			0,
			conf.borderwidth - half,
			client->height + conf.borderwidth - half
		},
		{
			0,
			client->height,
			client->width + conf.borderwidth
				- half,conf.borderwidth - half
		},
		{
			0,
			client->height + conf.borderwidth + half,client->width
				+ conf.borderwidth - half,conf.borderwidth
				- half
		},
		{
			client->width + conf.borderwidth
				+ half,conf.borderwidth + client->height
				+ half,conf.borderwidth,
			conf.borderwidth
		}
	};

	xcb_rectangle_t rect_outer[] = {
		{
			client->width + conf.borderwidth - half,
			0,
			half,
			client->height + conf.borderwidth * 2
		},
		{
			client->width + conf.borderwidth,
			0,
			half,
			client->height + conf.borderwidth * 2
		},
		{
			0,
			client->height + conf.borderwidth - half,client->width
				+ conf.borderwidth * 2,
			half
		},
		{
			0,
			client->height + conf.borderwidth,
			client->width + conf.borderwidth * 2,
			half
		},
		{
			1,1,1,1
		}
	};

	xcb_pixmap_t pmap = xcb_generate_id(conn);
	xcb_create_pixmap(conn, client->depth, pmap, client->id,
			client->width + (conf.borderwidth * 2),
			client->height + (conf.borderwidth * 2)
	);

	xcb_gcontext_t gc = xcb_generate_id(conn);
	xcb_create_gc(conn, gc, pmap, 0, NULL);

	if (inv) {
		xcb_rectangle_t fake_rect[5];

		for (uint8_t i=0;i<5;i++) {
			fake_rect[i]  = rect_outer[i];
			rect_outer[i] = rect_inner[i];
			rect_inner[i] = fake_rect[i];
		}
	}

	values[0]  = conf.outer_border_col;

	if (client->unkillable || client->fixed) {
		if (client->unkillable && client->fixed)
			values[0]  = conf.fixed_unkil_col;
		else
			if (client->fixed)
				values[0]  = conf.fixedcol;
			else
				values[0]  = conf.unkillcol;
	}

	xcb_change_gc(conn, gc, XCB_GC_FOREGROUND, &values[0]);
	xcb_poly_fill_rectangle(conn, pmap, gc, 5, rect_outer);

	values[0]   = conf.focuscol;

	if (!isitfocused)
		values[0] = conf.unfocuscol;

	xcb_change_gc(conn, gc, XCB_GC_FOREGROUND, &values[0]);
	xcb_poly_fill_rectangle(conn, pmap, gc, 5, rect_inner);
	values[0] = pmap;
	xcb_change_window_attributes(conn,client->id, XCB_CW_BORDER_PIXMAP,
			&values[0]);

	/* free the memory we allocated for the pixmap */
	xcb_free_pixmap(conn,pmap);
	xcb_free_gc(conn,gc);
	xcb_flush(conn);
}

void
unmax(struct client *client)
{
	uint32_t values[5], mask = 0;

	if (NULL == client)
		return;

	client->x = client->origsize.x;
	client->y = client->origsize.y;
	client->width = client->origsize.width;
	client->height = client->origsize.height;

	/* Restore geometry. */
	values[0] = client->x;
	values[1] = client->y;
	values[2] = client->width;
	values[3] = client->height;

	client->maxed = client->hormaxed = 0;
	moveresize(client->id, client->x, client->y,
			client->width, client->height);

	centerpointer(client->id,client);
	setborders(client,true);
}

void
maximize(const Arg *arg)
{
	maxwin(focuswin, 1);
}

void
fullscreen(const Arg *arg)
{
	maxwin(focuswin, 0);
}


void
unmaxwin(struct client *client){
	unmax(client);
	client->maxed = false;
	setborders(client,true);
	xcb_change_property(conn, XCB_PROP_MODE_REPLACE, client->id,
			ewmh->_NET_WM_STATE, XCB_ATOM_ATOM, 32, 0, NULL);
}

void 
maxwin(struct client *client, uint8_t with_offsets){
	uint32_t values[4];
	int16_t mon_x, mon_y;
	int16_t mon_width, mon_height;

	if (NULL == focuswin)
		return;

	/* Check if maximized already. If so, revert to stored geometry. */
	if (focuswin->maxed) {
		unmaxwin(focuswin);
		return;
	}

	getmonsize(with_offsets, &mon_x, &mon_y, &mon_width, &mon_height, client);
	maximize_helper(client, mon_x, mon_y, mon_width, mon_height);
	raise_current_window();
	if (!with_offsets) {
		xcb_change_property(conn, XCB_PROP_MODE_REPLACE, client->id,
			ewmh->_NET_WM_STATE, XCB_ATOM_ATOM, 32, 1, &ewmh->_NET_WM_STATE_FULLSCREEN);
	}
	xcb_flush(conn);
}

void
maxvert_hor(const Arg *arg)
{
	uint32_t values[2];
	int16_t mon_y, mon_x, temp = 0;
	uint16_t mon_height, mon_width;

	if (NULL == focuswin)
		return;

	if (focuswin->vertmaxed || focuswin->hormaxed) {
		unmax(focuswin);
		focuswin->vertmaxed = focuswin->hormaxed = false;
		fitonscreen(focuswin);
		setborders(focuswin, true);
		return;
	}

	getmonsize(1, &mon_x,&mon_y,&mon_width,&mon_height,focuswin);
	saveorigsize(focuswin);
	noborder(&temp, focuswin,true);

	if (arg->i==TWOBWM_MAXIMIZE_VERTICALLY) {
		focuswin->y = mon_y;
		/* Compute new height considering height increments
		 * and screen height. */
		focuswin->height = mon_height - (conf.borderwidth * 2);

		/* Move to top of screen and resize. */
		values[0] = focuswin->y;
		values[1] = focuswin->height;

		xcb_configure_window(conn, focuswin->id, XCB_CONFIG_WINDOW_Y
				| XCB_CONFIG_WINDOW_HEIGHT, values);

		focuswin->vertmaxed = true;
	} else if (arg->i==TWOBWM_MAXIMIZE_HORIZONTALLY) {
		focuswin->x = mon_x;
		focuswin->width = mon_width - (conf.borderwidth * 2);
		values[0] = focuswin->x;
		values[1] = focuswin->width;

		xcb_configure_window(conn, focuswin->id, XCB_CONFIG_WINDOW_X
				| XCB_CONFIG_WINDOW_WIDTH, values);

		focuswin->hormaxed = true;
	}

	noborder(&temp, focuswin,false);
	raise_current_window();
	centerpointer(focuswin->id,focuswin);
	setborders(focuswin,true);
}

void
maxhalf(const Arg *arg)
{
	uint32_t values[4];
	int16_t mon_x, mon_y, temp=0;
	uint16_t mon_width, mon_height;

	if (NULL == focuswin||focuswin->maxed)
		return;

	getmonsize(1, &mon_x,&mon_y,&mon_width,&mon_height,focuswin);
	noborder(&temp, focuswin, true);

	if (arg->i>4) {
		if (arg->i>6) {
			/* in folding mode */
			if (arg->i == TWOBWM_MAXHALF_FOLD_VERTICAL)
				focuswin->height = focuswin->height / 2
					- (conf.borderwidth);
			else
				focuswin->height = focuswin->height * 2
					+ (2*conf.borderwidth);
		} else {
			focuswin->y      =  mon_y;
			focuswin->height =  mon_height - (conf.borderwidth * 2);
			focuswin->width  = ((float)(mon_width) / 2)
				- (conf.borderwidth * 2);

			if (arg->i== TWOBWM_MAXHALF_VERTICAL_LEFT)
				focuswin->x = mon_x;
			else
				focuswin->x = mon_x + mon_width
					- (focuswin->width
					+ conf.borderwidth * 2);
		}
	} else {
		if (arg->i < 2) {
			/* in folding mode */
			if (arg->i == TWOBWM_MAXHALF_FOLD_HORIZONTAL)
				focuswin->width = focuswin->width / 2
					- conf.borderwidth;
			else
				focuswin->width = focuswin->width * 2
					+ (2 * conf.borderwidth); //unfold
		} else {
			focuswin->x     =  mon_x;
			focuswin->width =  mon_width - (conf.borderwidth * 2);
			focuswin->height = ((float)(mon_height) / 2)
				- (conf.borderwidth * 2);

			if (arg->i == TWOBWM_MAXHALF_HORIZONTAL_TOP)
				focuswin->y = mon_y;
			else
				focuswin->y = mon_y + mon_height
					- (focuswin->height
					+ conf.borderwidth * 2);
		}
	}

	moveresize(focuswin->id, focuswin->x, focuswin->y,
			focuswin->width, focuswin->height);

	focuswin->verthor = true;
	noborder(&temp, focuswin, false);
	raise_current_window();
	fitonscreen(focuswin);
	centerpointer(focuswin->id, focuswin);
	setborders(focuswin, true);
}

void
hide(void)
{
	if (focuswin==NULL)
		return;

	long data[] = {
		XCB_ICCCM_WM_STATE_ICONIC,
		ewmh->_NET_WM_STATE_HIDDEN,
		XCB_NONE
	};

	/* Unmap window and declare iconic. Unmapping will generate an
	 * UnmapNotify event so we can forget about the window later. */
	focuswin->iconic = true;

	xcb_unmap_window(conn, focuswin->id);
	xcb_change_property(conn, XCB_PROP_MODE_REPLACE, focuswin->id,
			ewmh->_NET_WM_STATE, ewmh->_NET_WM_STATE, 32, 3, data);

	xcb_flush(conn);
}

bool
getpointer(const xcb_drawable_t *win, int16_t *x, int16_t *y)
{
	xcb_query_pointer_reply_t *pointer;

	pointer = xcb_query_pointer_reply(conn,
			xcb_query_pointer(conn, *win), 0);
	if (NULL == pointer)
		return false;
	*x = pointer->win_x;
	*y = pointer->win_y;

	free(pointer);
	return true;
}

bool
getgeom(const xcb_drawable_t *win, int16_t *x, int16_t *y, uint16_t *width,
		uint16_t *height, uint8_t *depth)
{
	xcb_get_geometry_reply_t *geom = xcb_get_geometry_reply(conn,
			xcb_get_geometry(conn, *win), NULL);

	if (NULL == geom)
		return false;

	*x = geom->x;
	*y = geom->y;
	*width = geom->width;
	*height = geom->height;
	*depth = geom->depth;

	free(geom);
	return true;
}

void
teleport(const Arg *arg)
{
	int16_t pointx, pointy, mon_x, mon_y, temp = 0;
	uint16_t mon_width, mon_height;

	if (NULL == focuswin|| NULL == wslist[curws]|| focuswin->maxed)
		return;

	if (!getpointer(&focuswin->id, &pointx, &pointy))
		return;
	uint16_t tmp_x = focuswin->x;
	uint16_t tmp_y = focuswin->y;

	getmonsize(1, &mon_x, &mon_y, &mon_width, &mon_height,focuswin);
	noborder(&temp, focuswin,true);
	focuswin->x = mon_x; focuswin->y = mon_y;

	if (arg->i==TWOBWM_TELEPORT_CENTER) { /* center */
		focuswin->x  += mon_width - (focuswin->width
				+ conf.borderwidth * 2) +mon_x;
		focuswin->y  += mon_height - (focuswin->height
				+ conf.borderwidth* 2)+ mon_y;
		focuswin->y  = focuswin->y /2;
		focuswin->x  = focuswin->x /2;
	} else {
		/* top-left */
		if (arg->i>3) {
			/* bottom-left */
			if (arg->i == TWOBWM_TELEPORT_BOTTOM_LEFT)
				focuswin->y += mon_height - (focuswin->height
						+ conf.borderwidth* 2);
			/* center y */
			else if (arg->i == TWOBWM_TELEPORT_CENTER_Y) {
				focuswin->x  = tmp_x;
				focuswin->y += mon_height - (focuswin->height
						+ conf.borderwidth* 2)+ mon_y;
				focuswin->y  = focuswin->y /2;
			}
		} else {
			/* top-right */
			if (arg->i<2)
				/* center x */
				if (arg->i==TWOBWM_TELEPORT_CENTER_X) {
					focuswin->y  = tmp_y;
					focuswin->x += mon_width
						- (focuswin->width
						+ conf.borderwidth * 2)
						+ mon_x;
					focuswin->x  = focuswin->x /2;
				} else
					focuswin->x += mon_width
						- (focuswin->width
						+ conf.borderwidth * 2);
				else {
					/* bottom-right */
					focuswin->x += mon_width
						- (focuswin->width
						+ conf.borderwidth * 2);
					focuswin->y += mon_height
						- (focuswin->height
						+ conf.borderwidth * 2);
				}
		}
	}

	movewindow(focuswin->id, focuswin->x, focuswin->y);
	movepointerback(pointx,pointy, focuswin);
	noborder(&temp, focuswin, false);
	raise_current_window();
	xcb_flush(conn);
}

void
deletewin()
{
	bool use_delete = false;
	xcb_icccm_get_wm_protocols_reply_t protocols;
	xcb_get_property_cookie_t cookie;

	if (NULL == focuswin || focuswin->unkillable==true)
		return;

	/* Check if WM_DELETE is supported.  */
	cookie = xcb_icccm_get_wm_protocols_unchecked(conn, focuswin->id,
			ewmh->WM_PROTOCOLS);

	if (focuswin->id == top_win)
		top_win = 0;

	if (xcb_icccm_get_wm_protocols_reply(conn, cookie, &protocols, NULL)
			== 1) {
		for (uint32_t i = 0; i < protocols.atoms_len; i++)
			if (protocols.atoms[i] == ATOM[wm_delete_window]) {
				xcb_client_message_event_t ev = {
					.response_type = XCB_CLIENT_MESSAGE,
					.format = 32,
					.sequence = 0,
					.window = focuswin->id,
					.type = ewmh->WM_PROTOCOLS,
					.data.data32 = {
						ATOM[wm_delete_window],
						XCB_CURRENT_TIME
					}
				};

				xcb_send_event(conn, false, focuswin->id,
						XCB_EVENT_MASK_NO_EVENT,
						(char *)&ev
				);

				use_delete = true;
				break;
			}

		xcb_icccm_get_wm_protocols_reply_wipe(&protocols);
    }
    if (!use_delete) xcb_kill_client(conn, focuswin->id);
}

void
changescreen(const Arg *arg)
{
	struct item *item;
	float xpercentage, ypercentage;

	if (NULL == focuswin || NULL == focuswin->monitor)
		return;

	if (arg->i == TWOBWM_NEXT_SCREEN)
		item = focuswin->monitor->item->next;
	else
		item = focuswin->monitor->item->prev;

	if (NULL == item)
		return;

	xpercentage  = (float)((focuswin->x - focuswin->monitor->x)
			/(focuswin->monitor->width));
	ypercentage  = (float)((focuswin->y-focuswin->monitor->y)
			/(focuswin->monitor->height));

	focuswin->monitor = item->data;

	focuswin->x = focuswin->monitor->width * xpercentage
		+ focuswin->monitor->x + 0.5;
	focuswin->y = focuswin->monitor->height * ypercentage
		+ focuswin->monitor->y+0.5;

	raise_current_window();
	fitonscreen(focuswin);
	movelim(focuswin);
	setborders(focuswin, true);
	centerpointer(focuswin->id, focuswin);
}

/* Function to make the cursor move with the keyboard */
void
cursor_move(const Arg *arg)
{
	uint16_t speed; uint8_t cases=arg->i%4;
	arg->i < 4 ? (speed = movements[3]) : (speed = movements[2]);

	if (cases == TWOBWM_CURSOR_UP)
		xcb_warp_pointer(conn, XCB_NONE, XCB_NONE,
				0, 0, 0, 0, 0, -speed);
	else if (cases == TWOBWM_CURSOR_DOWN)
		xcb_warp_pointer(conn, XCB_NONE, XCB_NONE,
				0, 0, 0, 0, 0, speed);
	else if (cases == TWOBWM_CURSOR_RIGHT)
		xcb_warp_pointer(conn, XCB_NONE, XCB_NONE,
				0, 0, 0, 0, speed, 0);
	else if (cases == TWOBWM_CURSOR_LEFT)
		xcb_warp_pointer(conn, XCB_NONE, XCB_NONE,
				0, 0, 0, 0, -speed, 0);

	xcb_flush(conn);
}

/* wrapper to get xcb keysymbol from keycode */
static xcb_keysym_t
xcb_get_keysym(xcb_keycode_t keycode)
{
	xcb_key_symbols_t *keysyms;

	if (!(keysyms = xcb_key_symbols_alloc(conn)))
		return 0;

	xcb_keysym_t keysym = xcb_key_symbols_get_keysym(keysyms, keycode, 0);
	xcb_key_symbols_free(keysyms);

	return keysym;
}

void
circulaterequest(xcb_generic_event_t *ev)
{
	xcb_circulate_request_event_t *e = (xcb_circulate_request_event_t *)ev;

	/*
	 * Subwindow e->window to parent e->event is about to be restacked.
	 * Just do what was requested, e->place is either
	 * XCB_PLACE_ON_TOP or _ON_BOTTOM.
	 */
	xcb_circulate_window(conn, e->window, e->place);
}

void
handle_keypress(xcb_generic_event_t *e)
{
	xcb_key_press_event_t *ev       = (xcb_key_press_event_t *)e;
	xcb_keysym_t           keysym   = xcb_get_keysym(ev->detail);

	for (unsigned int i=0; i<LENGTH(keys); i++) {
		if (keysym == keys[i].keysym && CLEANMASK(keys[i].mod)
				== CLEANMASK(ev->state) && keys[i].func) {
			keys[i].func(&keys[i].arg);
			break;
		}
	}
}

/* Helper function to configure a window. */
void
configwin(xcb_window_t win, uint16_t mask, const struct winconf *wc)
{
	uint32_t values[7];
	int8_t i = -1;

	if (mask & XCB_CONFIG_WINDOW_X) {
		mask |= XCB_CONFIG_WINDOW_X;
		i++;
		values[i] = wc->x;
	}

	if (mask & XCB_CONFIG_WINDOW_Y) {
		mask |= XCB_CONFIG_WINDOW_Y;
		i++;
		values[i] = wc->y;
	}

	if (mask & XCB_CONFIG_WINDOW_WIDTH) {
		mask |= XCB_CONFIG_WINDOW_WIDTH;
		if (wc->width != 0) {
			i++;
			values[i] = wc->width;
		}
	}

	if (mask & XCB_CONFIG_WINDOW_HEIGHT) {
		mask |= XCB_CONFIG_WINDOW_HEIGHT;
		if (wc->height != 0) {
			i++;
			values[i] = wc->height;
		}
	}

	if (mask & XCB_CONFIG_WINDOW_SIBLING) {
		mask |= XCB_CONFIG_WINDOW_SIBLING;
		i++;
		values[i] = wc->sibling;
	}

	if (mask & XCB_CONFIG_WINDOW_STACK_MODE) {
		mask |= XCB_CONFIG_WINDOW_STACK_MODE;
		i++;
		values[i] = wc->stackmode;
	}

	if (i == -1)
		return;

	xcb_configure_window(conn, win, mask, values);
	xcb_flush(conn);
}

void
configurerequest(xcb_generic_event_t *ev)
{
	xcb_configure_request_event_t *e = (xcb_configure_request_event_t *)ev;
	struct client *client;
	struct winconf wc;
	int16_t mon_x, mon_y;
	uint16_t mon_width, mon_height;
	uint32_t values[1];

	if ((client = findclient(&e->window))) { /* Find the client. */
		getmonsize(1, &mon_x, &mon_y, &mon_width, &mon_height, client);

		if (e->value_mask & XCB_CONFIG_WINDOW_WIDTH)
			if (!client->maxed && !client->hormaxed)
				client->width = e->width;

		if (e->value_mask & XCB_CONFIG_WINDOW_HEIGHT)
			if (!client->maxed && !client->vertmaxed)
				client->height = e->height;

		
		if (e->value_mask & XCB_CONFIG_WINDOW_X)
		 	if (!client->maxed && !client->hormaxed)
				client->x = e->x;

		if (e->value_mask & XCB_CONFIG_WINDOW_Y)
		 	if (!client->maxed && !client->vertmaxed)
				client->y = e->y;

		/* XXX Do we really need to pass on sibling and stack mode
		 * configuration? Do we want to? */
		if (e->value_mask & XCB_CONFIG_WINDOW_SIBLING) {
			values[0] = e->sibling;
			xcb_configure_window(conn, e->window,
					XCB_CONFIG_WINDOW_SIBLING,values);
		}

		if (e->value_mask & XCB_CONFIG_WINDOW_STACK_MODE) {
			values[0] = e->stack_mode;
			xcb_configure_window(conn, e->window,
					XCB_CONFIG_WINDOW_STACK_MODE,values);
		}

		/* Check if window fits on screen after resizing. */
		if (!client->maxed) {
			resizelim(client);
			movelim(client);
			fitonscreen(client);
		}

		setborders(client,true);
	} else {
		/* Unmapped window, pass all options except border width. */
		wc.x = e->x;
		wc.y = e->y;
		wc.width = e->width;
		wc.height = e->height;
		wc.sibling = e->sibling;
		wc.stackmode = e->stack_mode;

		configwin(e->window, e->value_mask, &wc);
	}
}

xcb_cursor_t
Create_Font_Cursor(xcb_connection_t *conn, uint16_t glyph)
{
	static xcb_font_t cursor_font;

	cursor_font = xcb_generate_id (conn);
	xcb_open_font(conn, cursor_font, strlen("cursor"), "cursor");
	xcb_cursor_t cursor = xcb_generate_id (conn);
	xcb_create_glyph_cursor(conn, cursor, cursor_font, cursor_font, glyph,
			glyph + 1,0x3232, 0x3232, 0x3232, 0xeeee, 0xeeee, 0xeeec
	);

	return cursor;
}

struct client
create_back_win(void)
{
	struct client temp_win;
	uint32_t values[1] = { conf.focuscol };

	temp_win.id = xcb_generate_id(conn);
	xcb_create_window(conn,
			/* depth */
			XCB_COPY_FROM_PARENT,
			/* window Id */
			temp_win.id,
			/* parent window */
			screen->root,
			/* x, y */
			focuswin->x,
			focuswin->y,
			/* width, height */
			focuswin->width,
			focuswin->height,
			/* border width */
			borders[3],
			/* class */
			XCB_WINDOW_CLASS_INPUT_OUTPUT,
			/* visual */
			screen->root_visual,
			XCB_CW_BORDER_PIXEL,
			values
	);

	if (conf.enable_compton)
	{
		values[0] = 1;
		xcb_change_window_attributes(conn, temp_win.id,
				XCB_BACK_PIXMAP_PARENT_RELATIVE, values);
	}
	else
	{
		values[0] = conf.unfocuscol;
		xcb_change_window_attributes(conn, temp_win.id,
				XCB_CW_BACK_PIXEL, values);
	}

	temp_win.x              = focuswin->x;
	temp_win.y              = focuswin->y;
	temp_win.width          = focuswin->width;
	temp_win.unkillable     = focuswin->unkillable;
	temp_win.fixed          = focuswin->fixed;
	temp_win.height         = focuswin->height;
	temp_win.width_inc      = focuswin->width_inc;
	temp_win.height_inc     = focuswin->height_inc;
	temp_win.base_width     = focuswin->base_width;
	temp_win.base_height    = focuswin->base_height;
	temp_win.monitor        = focuswin->monitor;
	temp_win.min_height     = focuswin->min_height;
	temp_win.min_width      = focuswin->min_height;
	temp_win.ignore_borders = focuswin->ignore_borders;

	return temp_win;
}

static void
mousemotion(const Arg *arg)
{
	int16_t mx, my, winx, winy, winw, winh;
	xcb_query_pointer_reply_t *pointer;
	xcb_grab_pointer_reply_t  *grab_reply;
	xcb_motion_notify_event_t *ev = NULL;
	xcb_generic_event_t       *e  = NULL;
	bool ungrab;

	pointer = xcb_query_pointer_reply(conn,
			xcb_query_pointer(conn, screen->root), 0
	);

	if (!pointer || focuswin->maxed) {
		free(pointer);
		return;
	}

	mx   = pointer->root_x;
	my   = pointer->root_y;
	winx = focuswin->x;
	winy = focuswin->y;
	winw = focuswin->width;
	winh = focuswin->height;

	xcb_cursor_t cursor;
	struct client example;
	raise_current_window();

	if(arg->i == TWOBWM_MOVE)
		cursor = Create_Font_Cursor (conn, 52 ); /* fleur */
	else {
		cursor  = Create_Font_Cursor (conn, 120); /* sizing */
		example = create_back_win();
		xcb_map_window(conn,example.id);
	}

	grab_reply = xcb_grab_pointer_reply(conn, xcb_grab_pointer(conn, 0,
			screen->root, BUTTONMASK | XCB_EVENT_MASK_BUTTON_MOTION
			| XCB_EVENT_MASK_POINTER_MOTION, XCB_GRAB_MODE_ASYNC,
			XCB_GRAB_MODE_ASYNC, XCB_NONE, cursor, XCB_CURRENT_TIME)
			, NULL
	);

	if (grab_reply->status != XCB_GRAB_STATUS_SUCCESS) {
		free(grab_reply);

		if (arg->i == TWOBWM_RESIZE)
			xcb_unmap_window(conn,example.id);

		return;
	}

	free(grab_reply);
	ungrab = false;

	do {
		if (NULL!=e)
			free(e);

		while(!(e = xcb_wait_for_event(conn)))
			xcb_flush(conn);

		switch (e->response_type & ~0x80) {
		case XCB_CONFIGURE_REQUEST:
		case XCB_MAP_REQUEST:
			events[e->response_type & ~0x80](e);
			break;
		case XCB_MOTION_NOTIFY:
			ev = (xcb_motion_notify_event_t*)e;
			if (arg->i == TWOBWM_MOVE)
				mousemove(winx + ev->root_x - mx,
						winy + ev->root_y-my);
			else
				mouseresize(&example, winw + ev->root_x - mx,
						winh + ev->root_y - my);

			xcb_flush(conn);
			break;
		case XCB_KEY_PRESS:
		case XCB_KEY_RELEASE:
		case XCB_BUTTON_PRESS:
		case XCB_BUTTON_RELEASE:
			if (arg->i==TWOBWM_RESIZE) {
				ev = (xcb_motion_notify_event_t*)e;

				mouseresize(focuswin, winw + ev->root_x - mx,
						winh + ev->root_y - my);

				setborders(focuswin,true);
			}

			ungrab = true;
			break;
		}
	} while (!ungrab && focuswin != NULL);

	free(pointer);
	free(e);
	xcb_free_cursor(conn,cursor);
	xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);

	if (arg->i == TWOBWM_RESIZE)
		xcb_unmap_window(conn,example.id);

	xcb_flush(conn);
}

void
buttonpress(xcb_generic_event_t *ev)
{
	xcb_button_press_event_t *e = (xcb_button_press_event_t *)ev;
	struct client *client;
	unsigned int i;


	if (!is_sloppy && e->detail == XCB_BUTTON_INDEX_1
			&& CLEANMASK(e->state) == 0) {
		// skip if already focused
		if (NULL != focuswin && e->event == focuswin->id) {
			return;
		}
		client = findclient(&e->event);
		if (NULL != client) {
			setfocus(client);
			raisewindow(client->id);
			setborders(client,true);
		}
		return;
	}

	for (i=0; i<LENGTH(buttons); i++)
		if (buttons[i].func && buttons[i].button == e->detail
				&& CLEANMASK(buttons[i].mask)
				== CLEANMASK(e->state)){
			if ((focuswin==NULL) && buttons[i].func == mousemotion)
				return;
			if (buttons[i].root_only) {
				if (e->event == e->root && e->child == 0)
					buttons[i].func(&(buttons[i].arg));
			}
			else {
				buttons[i].func(&(buttons[i].arg));
			}
		}
}

void
clientmessage(xcb_generic_event_t *ev)
{
	xcb_client_message_event_t *e= (xcb_client_message_event_t *)ev;
	struct client *cl;

	if ((e->type == ATOM[wm_change_state] && e->format==32
			&& e->data.data32[0]==XCB_ICCCM_WM_STATE_ICONIC)
			|| e->type == ewmh->_NET_ACTIVE_WINDOW) {
		cl = findclient( &e->window);

		if (NULL == cl)
			return;

		if ( false == cl->iconic ) {
			if (e->type == ewmh->_NET_ACTIVE_WINDOW) {
				setfocus(cl);
				raisewindow(cl->id);
			} else {
				hide();
			}

			return;
		}

		cl->iconic = false;
		xcb_map_window(conn, cl->id);
		setfocus(cl);
	}
	else if (e->type == ewmh->_NET_CURRENT_DESKTOP)
		changeworkspace_helper(e->data.data32[0]);
	else if (e->type == ewmh->_NET_WM_STATE && e->format == 32) {
		cl = findclient(&e->window);
		if (NULL == cl)
			return;
		if(e->data.data32[1] == ewmh->_NET_WM_STATE_FULLSCREEN
				|| e->data.data32[2] == ewmh->_NET_WM_STATE_FULLSCREEN) {
			switch (e->data.data32[0]) {
				case XCB_EWMH_WM_STATE_REMOVE:
					unmaxwin(cl);
					break;
				case XCB_EWMH_WM_STATE_ADD:
					maxwin(cl, false);
					break;
				case XCB_EWMH_WM_STATE_TOGGLE:
						if(cl->maxed)
							unmaxwin(cl);
						else
							maxwin(cl, false);
					break;

				default:
					break;
			}
		}
	} else if (e->type == ewmh->_NET_WM_DESKTOP && e->format == 32) {
		cl = findclient(&e->window);
		if (NULL == cl)
			return;
		/*
		 * e->data.data32[1] Source indication
		 * 0: backward compat
		 * 1: normal
		 * 2: pager/bars
		 *
		 * e->data.data32[0] new workspace
		 */
		delfromworkspace(cl);
		addtoworkspace(cl, e->data.data32[0]);
		xcb_unmap_window(conn, cl->id);
		xcb_flush(conn);
	}
}

void
destroynotify(xcb_generic_event_t *ev)
{
	struct client *cl;

	xcb_destroy_notify_event_t *e = (xcb_destroy_notify_event_t *) ev;
	if (NULL != focuswin && focuswin->id == e->window)
		focuswin = NULL;

	cl = findclient( & e->window);

	/* Find this window in list of clients and forget about it. */
	if (NULL != cl)
		forgetwin(cl->id);

	updateclientlist();
}

void
enternotify(xcb_generic_event_t *ev)
{
	xcb_enter_notify_event_t *e = (xcb_enter_notify_event_t *)ev;
	struct client *client;
	unsigned int modifiers[] = {
		0,
		XCB_MOD_MASK_LOCK,
		numlockmask,
		numlockmask | XCB_MOD_MASK_LOCK
	};


	/*
	 * If this isn't a normal enter notify, don't bother. We also need
	 * ungrab events, since these will be generated on button and key
	 * grabs and if the user for some reason presses a button on the
	 * root and then moves the pointer to our window and releases the
	 * button, we get an Ungrab EnterNotify. The other cases means the
	 * pointer is grabbed and that either means someone is using it for
	 * menu selections or that we're moving or resizing. We don't want
	 * to change focus in those cases.
	 */


	if (e->mode == XCB_NOTIFY_MODE_NORMAL
			|| e->mode == XCB_NOTIFY_MODE_UNGRAB) {
		/* If we're entering the same window we focus now,
		 * then don't bother focusing. */

		if (NULL != focuswin && e->event == focuswin->id)
			return;


		/* Otherwise, set focus to the window we just entered if we
		 * can find it among the windows we know about.
		 * If not, just keep focus in the old window. */

		client = findclient(&e->event);
		if (NULL == client)
			return;

		/* skip this if not is_sloppy
		 * we'll focus on click instead (see buttonpress function)
		 * thus we have to grab left click button on that window
		 * the grab is removed at the end of the setfocus function,
		 * in the grabbuttons when not in sloppy mode
		 */
		if (!is_sloppy) {
			for (unsigned int m=0; m<LENGTH(modifiers); m++) {
				xcb_grab_button(conn,
						0, // owner_events => 0 means
						   // the grab_window won't
						   // receive this event
						client->id,
						XCB_EVENT_MASK_BUTTON_PRESS,
						XCB_GRAB_MODE_ASYNC,
						XCB_GRAB_MODE_ASYNC,
						screen->root, XCB_NONE,
						XCB_BUTTON_INDEX_1,
						modifiers[m]
				);
			}
			return;
		}

		setfocus(client);
		setborders(client,true);
	}
}

void
unmapnotify(xcb_generic_event_t *ev)
{
	xcb_unmap_notify_event_t *e = (xcb_unmap_notify_event_t *)ev;
	struct client *client = NULL;
	/*
	 * Find the window in our current workspace list, then forget about it.
	 * Note that we might not know about the window we got the UnmapNotify
	 * event for.
	 * It might be a window we just unmapped on *another* workspace when
	 * changing workspaces, for instance, or it might be a window with
	 * override redirect set.
	 * This is not an error.
	 * XXX We might need to look in the global window list, after all.
	 * Consider if a window is unmapped on our last workspace while
	 * changing workspaces.
	 * If we do this, we need to keep track of our own windows and
	 * ignore UnmapNotify on them.
	 */
	client = findclient( & e->window);
	if (NULL == client || client->ws != curws)
		return;
	if (focuswin!=NULL && client->id == focuswin->id)
		focuswin = NULL;
	if (client->iconic == false)
		forgetclient(client);

	updateclientlist();
}

void
mapnotify(xcb_generic_event_t *ev)
{
	xcb_mapping_notify_event_t *e = (xcb_mapping_notify_event_t *)ev;
	xcb_key_symbols_t *keysyms;
	if (!(keysyms = xcb_key_symbols_alloc(conn)))
		return;
	xcb_refresh_keyboard_mapping(keysyms, e);
	xcb_key_symbols_free(keysyms);

	setup_keyboard();
	grabkeys();
}

void
confignotify(xcb_generic_event_t *ev)
{
	xcb_configure_notify_event_t *e= (xcb_configure_notify_event_t *)ev;

	if (e->window == screen->root) {
		/*
		 * When using RANDR or Xinerama, the root can change geometry
		 * when the user adds a new screen, tilts their screen 90
		 * degrees or whatnot. We might need to rearrange windows to
		 * be visible.
		 * We might get notified for several reasons, not just if the
		 * geometry changed.
		 * If the geometry is unchanged we do nothing.
		 */

		if (e->width!=screen->width_in_pixels
				|| e->height != screen->height_in_pixels) {
			screen->width_in_pixels = e->width;
			screen->height_in_pixels = e->height;

			if (-1 == randrbase)
				arrangewindows();
		}
	}
}

void
run(void)
{
	sigcode = 0;

	while (0 == sigcode) {
		/* the WM is running */
		xcb_flush(conn);

		if (xcb_connection_has_error(conn)){
            cleanup();
			abort();
        }
		if ((ev = xcb_wait_for_event(conn))) {
			if(ev->response_type==randrbase +
					XCB_RANDR_SCREEN_CHANGE_NOTIFY)
				getrandr();

			if (events[ev->response_type & ~0x80])
				events[ev->response_type & ~0x80](ev);

			if(top_win!=0)
				raisewindow(top_win);
			if (dock_win != 0)
				raisewindow(dock_win);

			free(ev);
		}
	}
	if (sigcode == SIGHUP) {
		sigcode = 0;
		twobwm_restart();
	}
}

/* Get a defined atom from the X server. */
xcb_atom_t
getatom(const char *atom_name)
{
	xcb_intern_atom_cookie_t atom_cookie = xcb_intern_atom(conn, 0,
			strlen(atom_name), atom_name);

	xcb_intern_atom_reply_t *rep = xcb_intern_atom_reply(conn, atom_cookie,
			NULL);

	/* XXX Note that we return 0 as an atom if anything goes wrong.
	 * Might become interesting.*/

	if (NULL == rep)
		return 0;

	xcb_atom_t atom = rep->atom;

	free(rep);
	return atom;
}

/* set the given client to listen to button events (presses / releases) */
void
grabbuttons(struct client *c)
{
	unsigned int modifiers[] = {
		0,
		XCB_MOD_MASK_LOCK,
		numlockmask,
		numlockmask | XCB_MOD_MASK_LOCK
	};

	for (unsigned int b=0; b<LENGTH(buttons); b++)
		if (!buttons[b].root_only) {
			for (unsigned int m=0; m<LENGTH(modifiers); m++)
				xcb_grab_button(conn, 1, c->id,
						XCB_EVENT_MASK_BUTTON_PRESS,
						XCB_GRAB_MODE_ASYNC,
						XCB_GRAB_MODE_ASYNC,
						screen->root, XCB_NONE,
						buttons[b].button,
						buttons[b].mask|modifiers[m]
				);
		}

	/* ungrab the left click, otherwise we can't use it
	 * we've previously grabbed the left click in the enternotify function
	 * when not in sloppy mode
	 * though the name is counter-intuitive to the method
	 */
	for (unsigned int m=0; m<LENGTH(modifiers); m++) {
		xcb_ungrab_button(conn,
				XCB_BUTTON_INDEX_1,
				c->id,
				modifiers[m]
		);
	}
}

void
ewmh_init(void)
{
	if (!(ewmh = calloc(1, sizeof(xcb_ewmh_connection_t))))
		printf("Fail\n");

	xcb_intern_atom_cookie_t *cookie = xcb_ewmh_init_atoms(conn, ewmh);
	if(!xcb_ewmh_init_atoms_replies(ewmh, cookie, (void *)0)){
        fprintf(stderr,"%s\n","xcb_ewmh_init_atoms_replies:faild.");
        exit(1);
    }
}

bool
setup(int scrno)
{
	unsigned int i;
	uint32_t event_mask_pointer[] = { XCB_EVENT_MASK_POINTER_MOTION };

	unsigned int values[1] = {
		XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
		| XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY
		| XCB_EVENT_MASK_PROPERTY_CHANGE
		| XCB_EVENT_MASK_BUTTON_PRESS
	};

	screen = xcb_screen_of_display(conn, scrno);

	if (!screen)
		return false;

	ewmh_init();
	xcb_ewmh_set_wm_pid(ewmh, screen->root, getpid());
	xcb_ewmh_set_wm_name(ewmh, screen->root, 4, "2bwm");

	xcb_atom_t net_atoms[] = {
		ewmh->_NET_SUPPORTED,              ewmh->_NET_WM_DESKTOP,
		ewmh->_NET_NUMBER_OF_DESKTOPS,     ewmh->_NET_CURRENT_DESKTOP,
		ewmh->_NET_ACTIVE_WINDOW,          ewmh->_NET_WM_ICON,
		ewmh->_NET_WM_STATE,               ewmh->_NET_WM_NAME,
		ewmh->_NET_SUPPORTING_WM_CHECK ,   ewmh->_NET_WM_STATE_HIDDEN,
		ewmh->_NET_WM_ICON_NAME,           ewmh->_NET_WM_WINDOW_TYPE,
		ewmh->_NET_WM_WINDOW_TYPE_DOCK,    ewmh->_NET_WM_WINDOW_TYPE_DESKTOP,
		ewmh->_NET_WM_WINDOW_TYPE_TOOLBAR, ewmh->_NET_WM_PID,
		ewmh->_NET_CLIENT_LIST,            ewmh->_NET_CLIENT_LIST_STACKING,
		ewmh->WM_PROTOCOLS,                ewmh->_NET_WM_STATE,
		ewmh->_NET_WM_STATE_DEMANDS_ATTENTION,
		ewmh->_NET_WM_STATE_FULLSCREEN
	};

	xcb_ewmh_set_supported(ewmh, scrno, LENGTH(net_atoms), net_atoms);

	xcb_xrm_database_t* db = xcb_xrm_database_from_default(conn);

	// Load the default config anyway.
	conf.borderwidth			= borders[1];
	conf.outer_border		 = borders[0];
	conf.focuscol				 = getcolor(colors[0]);
	conf.unfocuscol			 = getcolor(colors[1]);
	conf.fixedcol				 = getcolor(colors[2]);
	conf.unkillcol				= getcolor(colors[3]);
	conf.outer_border_col = getcolor(colors[5]);
	conf.fixed_unkil_col	= getcolor(colors[4]);
	conf.empty_col				= getcolor(colors[6]);
	conf.inverted_colors	= inverted_colors;
	conf.enable_compton	 = false;

	if (db != NULL)
	{
		char* value;

		if (xcb_xrm_resource_get_string(db, "twobwm.border_width", NULL, &value) >= 0)
			conf.borderwidth = atoi(value);

		if (xcb_xrm_resource_get_string(db, "twobwm.outer_border", NULL, &value) >= 0)
			conf.outer_border = atoi(value);

		if (xcb_xrm_resource_get_string(db, "twobwm.focus_color", NULL, &value) >= 0)
			conf.focuscol = getcolor(value);

		if (xcb_xrm_resource_get_string(db, "twobwm.unfocus_color", NULL, &value) >= 0)
			conf.unfocuscol = getcolor(value);

		if (xcb_xrm_resource_get_string(db, "twobwm.fixed_color", NULL, &value) >= 0)
			conf.fixedcol = getcolor(value);

		if (xcb_xrm_resource_get_string(db, "twobwm.unkill_color", NULL, &value) >= 0)
			conf.unkillcol = getcolor(value);

		if (xcb_xrm_resource_get_string(db, "twobwm.outer_border_color", NULL, &value) >= 0)
			conf.outer_border_col = getcolor(value);

		if (xcb_xrm_resource_get_string(db, "twobwm.fixed_unkill_color", NULL, &value) >= 0)
			conf.fixed_unkil_col = getcolor(value);

		if (xcb_xrm_resource_get_string(db, "twobwm.inverted_colors", NULL, &value) >= 0)
			conf.inverted_colors = strcmp(value, "true") == 0;

		if (xcb_xrm_resource_get_string(db, "twobwm.enable_compton", NULL, &value) >= 0)
			conf.enable_compton = strcmp(value, "true") == 0;
	}

	xcb_xrm_database_free(db);

	for (i=0; i<NB_ATOMS; i++)
		ATOM[i] = getatom(atomnames[i][0]);

	randrbase = setuprandr();

	if (!setupscreen())
		return false;

	if (!setup_keyboard())
		return false;

	xcb_generic_error_t *error = xcb_request_check(conn,
			xcb_change_window_attributes_checked(conn, screen->root,
				XCB_CW_EVENT_MASK, values));
	xcb_flush(conn);

	if (error){
        fprintf(stderr,"%s\n","xcb_request_check:faild.");
        free(error);
		return false;
    }
	xcb_ewmh_set_current_desktop(ewmh, scrno, curws);
	xcb_ewmh_set_number_of_desktops(ewmh, scrno, WORKSPACES);

	grabkeys();
	/* set events */
	for (i=0; i<XCB_NO_OPERATION; i++)
		events[i] = NULL;

	events[XCB_CONFIGURE_REQUEST]   = configurerequest;
	events[XCB_DESTROY_NOTIFY]      = destroynotify;
	events[XCB_ENTER_NOTIFY]        = enternotify;
	events[XCB_KEY_PRESS]           = handle_keypress;
	events[XCB_MAP_REQUEST]         = newwin;
	events[XCB_UNMAP_NOTIFY]        = unmapnotify;
	events[XCB_MAPPING_NOTIFY]      = mapnotify;
	events[XCB_CONFIGURE_NOTIFY]    = confignotify;
	events[XCB_CIRCULATE_REQUEST]   = circulaterequest;
	events[XCB_BUTTON_PRESS]        = buttonpress;
	events[XCB_CLIENT_MESSAGE]      = clientmessage;

	return true;
}

void
twobwm_restart(void)
{
	xcb_set_input_focus(conn, XCB_NONE, XCB_INPUT_FOCUS_POINTER_ROOT,
			XCB_CURRENT_TIME);
	xcb_ewmh_connection_wipe(ewmh);

	if (ewmh)
		free(ewmh);

	xcb_disconnect(conn);
	execvp(TWOBWM_PATH, NULL);
}

void
sigcatch(const int sig)
{
	sigcode = sig;
}

void
install_sig_handlers(void)
{
	struct sigaction sa;
	struct sigaction sa_chld;
	sa.sa_handler = SIG_IGN;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_NOCLDSTOP;
	//could not initialize signal handler
	if (sigaction(SIGCHLD, &sa, NULL) == -1)
		exit(-1);
	sa.sa_handler = sigcatch;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_RESTART; /* Restart if interrupted by handler */
	if ( sigaction(SIGINT, &sa, NULL) == -1
		|| sigaction(SIGHUP, &sa, NULL) == -1
		|| sigaction(SIGTERM, &sa, NULL) == -1)
		exit(-1);
}

int
main(int argc, char **argv)
{
	int scrno = 0;
	atexit(cleanup);
	install_sig_handlers();
	if (!xcb_connection_has_error(conn = xcb_connect(NULL, &scrno)))
		if (setup(scrno))
			run();
	/* the WM has stopped running, because sigcode is not 0 */
	exit(sigcode);
}