/*

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

 * See LICENSE file for license details.

 */

#include <fcntl.h>

#include <stdlib.h>

#include <string.h>

#include <X11/keysym.h>

#include <X11/Xatom.h>

#include "wm.h"

/* local functions */

static void buttonpress(XEvent *e);

static void configurerequest(XEvent *e);

static void destroynotify(XEvent *e);

static void enternotify(XEvent *e);

static void leavenotify(XEvent *e);

static void expose(XEvent *e);

static void keymapnotify(XEvent *e);

static void maprequest(XEvent *e);

static void propertynotify(XEvent *e);

static void unmapnotify(XEvent *e);

void (*handler[LASTEvent]) (XEvent *) = {

	[ButtonPress] = buttonpress,

	[ConfigureRequest] = configurerequest,

	[DestroyNotify] = destroynotify,

	[EnterNotify] = enternotify,

	[LeaveNotify] = leavenotify,

	[Expose] = expose,

	[KeyPress] = keypress,

	[KeymapNotify] = keymapnotify,

	[MapRequest] = maprequest,

	[PropertyNotify] = propertynotify,

	[UnmapNotify] = unmapnotify

};

unsigned int

discard_events(long even_mask)

{

	XEvent ev;

	unsigned int n = 0;

	while(XCheckMaskEvent(dpy, even_mask, &ev)) n++;

	return n;

}

static void

buttonpress(XEvent *e)

{

	XButtonPressedEvent *ev = &e->xbutton;

	Client *c;

	if((c = getclient(ev->window))) {

		switch(ev->button) {

		default:

			break;

		case Button1:

			mmove(c);

			break;

		case Button2:

			XLowerWindow(dpy, c->win);

			break;

		case Button3:

			mresize(c);

			break;

		}

	}

}

static void

configurerequest(XEvent *e)

{

	XConfigureRequestEvent *ev = &e->xconfigurerequest;

	XWindowChanges wc;

	Client *c;

	ev->value_mask &= ~CWSibling;

	if((c = getclient(ev->window))) {

		if(ev->value_mask & CWX)

			c->x = ev->x;

		if(ev->value_mask & CWY)

			c->y = ev->y;

		if(ev->value_mask & CWWidth)

			c->w = ev->width;

		if(ev->value_mask & CWHeight)

			c->h = ev->height;

	}

	wc.x = ev->x;

	wc.y = ev->y;

	wc.width = ev->width;

	wc.height = ev->height;

	wc.sibling = None;

	wc.stack_mode = Above;

	ev->value_mask &= ~CWStackMode;

	ev->value_mask |= CWBorderWidth;

	XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);

	XFlush(dpy);

}

static void

destroynotify(XEvent *e)

{

	Client *c;

	XDestroyWindowEvent *ev = &e->xdestroywindow;

	if((c = getclient(ev->window)))

		unmanage(c);

}

static void

enternotify(XEvent *e)

{

	XCrossingEvent *ev = &e->xcrossing;

	Client *c;

	if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)

		return;

	if((c = getclient(ev->window)))

		focus(c);

	else if(ev->window == root) {

		sel_screen = True;

		/*draw_frames();*/

	}

}

static void

leavenotify(XEvent *e)

{

	XCrossingEvent *ev = &e->xcrossing;

	if((ev->window == root) && !ev->same_screen) {

		sel_screen = True;

		/*draw_frames();*/

	}

}

static void

expose(XEvent *e)

{

	XExposeEvent *ev = &e->xexpose;

	Client *c;

	if(ev->count == 0) {

		if((c = gettitle(ev->window)))

			draw_client(c);

		else if(ev->window == barwin)

			draw_bar();

	}

}

static void

keymapnotify(XEvent *e)

{

	update_keys();

}

static void

maprequest(XEvent *e)

{

	XMapRequestEvent *ev = &e->xmaprequest;

	static XWindowAttributes wa;

	if(!XGetWindowAttributes(dpy, ev->window, &wa))

		return;

	if(wa.override_redirect) {

		XSelectInput(dpy, ev->window,

				(StructureNotifyMask | PropertyChangeMask));

		return;

	}

	if(!getclient(ev->window))

		manage(ev->window, &wa);

}

static void

propertynotify(XEvent *e)

{

	XPropertyEvent *ev = &e->xproperty;

	Client *c;

	if(ev->state == PropertyDelete)

		return; /* ignore */

	if(ev->atom == wm_atom[WMProtocols]) {

		c->proto = win_proto(c->win);

		return;

	}

	if((c = getclient(ev->window))) {

		switch (ev->atom) {

			default: break;

			case XA_WM_TRANSIENT_FOR:

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

				break;

				update_size(c);

			case XA_WM_NORMAL_HINTS:

				update_size(c);

				break;

		}

		if(ev->atom == XA_WM_NAME || ev->atom == net_atom[NetWMName]) {

			update_name(c);

			if(c == stack)

				draw_bar();

			else

				draw_client(c);

		}

	}

}

static void

unmapnotify(XEvent *e)

{

	Client *c;

	XUnmapEvent *ev = &e->xunmap;

	if((c = getclient(ev->window)))

		unmanage(c);

}