/*

 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>

 * See LICENSE file for license details.

 */

#include <stdlib.h>

#include <string.h>

#include <X11/Xatom.h>

#include "util.h"

#include "wm.h"

#define CLIENT_MASK		(StructureNotifyMask | PropertyChangeMask | EnterWindowMask)

void

update_name(Client *c)

{

	XTextProperty name;

	int n;

	char **list = NULL;

	name.nitems = 0;

	c->name[0] = 0;

	XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);

	if(!name.nitems)

		XGetWMName(dpy, c->win, &name);

	if(!name.nitems)

		return;

	if(name.encoding == XA_STRING)

		strncpy(c->name, (char *)name.value, sizeof(c->name));

	else {

		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success

				&& n > 0 && *list)

		{

			strncpy(c->name, *list, sizeof(c->name));

			XFreeStringList(list);

		}

	}

	XFree(name.value);

	if(c == stack)

		draw_bar();

	else

		draw_client(c);

}

void

focus(Client *c)

{

	Client **l;

	for(l=&stack; *l && *l != c; l=&(*l)->snext);

	eassert(*l == c);

	*l = c->snext;

	c->snext = stack;

	stack = c;

	XRaiseWindow(dpy, c->win);

	XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);

	XFlush(dpy);

}

void

manage(Window w, XWindowAttributes *wa)

{

	Client *c, **l;

	XSetWindowAttributes twa;

	c = emallocz(sizeof(Client));

	c->win = w;

	XSetWindowBorderWidth(dpy, c->win, 1);

	XSelectInput(dpy, c->win, CLIENT_MASK);

	XGetTransientForHint(dpy, c->win, &c->trans);

	update_name(c);

	twa.override_redirect = 1;

	twa.background_pixmap = ParentRelative;

	twa.event_mask = ExposureMask;

			DefaultVisual(dpy, screen),

			CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);

	for(l=&clients; *l; l=&(*l)->next);

	c->next = *l; /* *l == nil */

	*l = c;

	c->snext = stack;

	stack = c;

	XMapWindow(dpy, c->win);

	XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,

			GrabModeAsync, GrabModeSync, None, None);

	XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,

			GrabModeAsync, GrabModeSync, None, None);

	XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,

			GrabModeAsync, GrabModeSync, None, None);

	focus(c);

}

void

resize(Client *c)

{

	XConfigureEvent e;

	e.type = ConfigureNotify;

	e.event = c->win;

	e.window = c->win;

	e.border_width = 0;

	e.above = None;

	e.override_redirect = False;

	XSelectInput(dpy, c->win, CLIENT_MASK & ~StructureNotifyMask);

	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);

	XSelectInput(dpy, c->win, CLIENT_MASK);

	XFlush(dpy);

}

static int

dummy_error_handler(Display *dpy, XErrorEvent *error)

{

	return 0;

}

void

unmanage(Client *c)

{

	Client **l;

	XGrabServer(dpy);

	XSetErrorHandler(dummy_error_handler);

	XUngrabButton(dpy, AnyButton, AnyModifier, c->win);

	XUnmapWindow(dpy, c->win);

	XDestroyWindow(dpy, c->title);

	for(l=&clients; *l && *l != c; l=&(*l)->next);

	eassert(*l == c);

	*l = c->next;

	for(l=&stack; *l && *l != c; l=&(*l)->snext);

	eassert(*l == c);

	*l = c->snext;

	free(c);

	XFlush(dpy);

	XSetErrorHandler(error_handler);

	XUngrabServer(dpy);

	discard_events(EnterWindowMask);

	if(stack)

		focus(stack);

}

Client *

getclient(Window w)

{

	Client *c;

	for(c = clients; c; c = c->next)

		if(c->win == w)

			return c;

	return NULL;

}

void

draw_client(Client *c)

{

}