/*

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

 * See LICENSE file for license details.

 */

#include "dwm.h"

#include <stdlib.h>

#include <X11/keysym.h>

#include <X11/Xatom.h>

typedef struct {

	unsigned long mod;

	KeySym keysym;

	void (*func)(Arg *arg);

	Arg arg;

} Key;

static void

movemouse(Client *c)

{

	int x1, y1, ocx, ocy, di;

	unsigned int dui;

	Window dummy;

	XEvent ev;

	ocx = c->x;

	ocy = c->y;

	if(XGrabPointer(dpy, root, False, MouseMask, GrabModeAsync, GrabModeAsync,

			None, cursor[CurMove], CurrentTime) != GrabSuccess)

		return;

	XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);

	for(;;) {

		XMaskEvent(dpy, MouseMask | ExposureMask, &ev);

		switch (ev.type) {

		default: break;

		case Expose:

			handler[Expose](&ev);

			break;

		case MotionNotify:

			XSync(dpy, False);

			c->x = ocx + (ev.xmotion.x - x1);

			c->y = ocy + (ev.xmotion.y - y1);

			resize(c, False, TopLeft);

			break;

		case ButtonRelease:

			XUngrabPointer(dpy, CurrentTime);

			return;

		}

	}

}

static void

resizemouse(Client *c)

{

	int ocx, ocy;

	Corner sticky;

	XEvent ev;

	ocx = c->x;

	ocy = c->y;

	if(XGrabPointer(dpy, root, False, MouseMask, GrabModeAsync, GrabModeAsync,

				None, cursor[CurResize], CurrentTime) != GrabSuccess)

		return;

	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w, c->h);

	for(;;) {

		XMaskEvent(dpy, MouseMask | ExposureMask, &ev);

		switch(ev.type) {

		default: break;

		case Expose:

			handler[Expose](&ev);

			break;

		case MotionNotify:

			XSync(dpy, False);

			c->w = abs(ocx - ev.xmotion.x);

			c->h = abs(ocy - ev.xmotion.y);

			c->x = (ocx <= ev.xmotion.x) ? ocx : ocx - c->w;

			c->y = (ocy <= ev.xmotion.y) ? ocy : ocy - c->h;

			if(ocx <= ev.xmotion.x)

				sticky = (ocy <= ev.xmotion.y) ? TopLeft : BotLeft;

			else

				sticky = (ocy <= ev.xmotion.y) ? TopRight : BotRight;

			resize(c, True, sticky);

			break;

		case ButtonRelease:

			XUngrabPointer(dpy, CurrentTime);

			return;

		}

	}

}

static void

buttonpress(XEvent *e)

{

	int x;

	Arg a;

	Client *c;

	XButtonPressedEvent *ev = &e->xbutton;

	if(barwin == ev->window) {

		switch(ev->button) {

		default:

			x = 0;

			for(a.i = 0; a.i < TLast; a.i++) {

				x += textw(tags[a.i]);

				if(ev->x < x) {

					view(&a);

					break;

				}

			}

			break;

		case Button4:

			a.i = (tsel + 1 < TLast) ? tsel + 1 : 0;

			view(&a);

			break;

		case Button5:

			a.i = (tsel - 1 >= 0) ? tsel - 1 : TLast - 1;

			view(&a);

			break;

		}

	}

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

		focus(c);

		switch(ev->button) {

		default:

			break;

		case Button1:

			if(!c->ismax && (arrange == dofloat || c->isfloat)) {

				higher(c);

				movemouse(c);

			}

			break;

		case Button2:

			lower(c);

			break;

		case Button3:

			if(!c->ismax && (arrange == dofloat || c->isfloat)) {

				higher(c);

				resizemouse(c);

			}

			break;

		}

	}

}

static void

configurerequest(XEvent *e)

{

	Client *c;

	XConfigureRequestEvent *ev = &e->xconfigurerequest;

	XWindowChanges wc;

	ev->value_mask &= ~CWSibling;

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

		gravitate(c, True);

		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;

		if(ev->value_mask & CWBorderWidth)

			c->border = 1;

		gravitate(c, False);

		resize(c, True, TopLeft);

	}

	wc.x = ev->x;

	wc.y = ev->y;

	wc.width = ev->width;

	wc.height = ev->height;

	wc.border_width = 1;

	wc.sibling = None;

	wc.stack_mode = Above;

	ev->value_mask &= ~CWStackMode;

	ev->value_mask |= CWBorderWidth;

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

	XSync(dpy, False);

}

static void

destroynotify(XEvent *e)

{

	Client *c;

	XDestroyWindowEvent *ev = &e->xdestroywindow;

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

		unmanage(c);

}

static void

enternotify(XEvent *e)

{

	Client *c;

	XCrossingEvent *ev = &e->xcrossing;

	if(ev->detail == NotifyInferior)

		return;

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

		focus(c);

	else if(ev->window == root)

		issel = True;

}

static void

expose(XEvent *e)

{

	Client *c;

	XExposeEvent *ev = &e->xexpose;

	if(ev->count == 0) {

		if(barwin == ev->window)

			drawstatus();

		else if((c = getctitle(ev->window)))

			drawtitle(c);

	}

}

static void

keypress(XEvent *e)

{

	static unsigned int len = sizeof(key) / sizeof(key[0]);

	unsigned int i;

	KeySym keysym;

	XKeyEvent *ev = &e->xkey;

	ev->state &= valid_mask;

	keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);

	for(i = 0; i < len; i++)

		if((keysym == key[i].keysym) && ((key[i].mod & valid_mask) == ev->state)) {

			if(key[i].func)

				key[i].func(&key[i].arg);

			return;

		}

}

static void

leavenotify(XEvent *e)

{

	XCrossingEvent *ev = &e->xcrossing;

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

		issel = True;

}

static void

maprequest(XEvent *e)

{

	static XWindowAttributes wa;

	XMapRequestEvent *ev = &e->xmaprequest;

	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)

{

	Client *c;

	Window trans;

	XPropertyEvent *ev = &e->xproperty;

	if(ev->state == PropertyDelete)

		return; /* ignore */

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

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

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

			return;

		}

		switch (ev->atom) {

			default: break;

			case XA_WM_TRANSIENT_FOR:

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

				if(!c->isfloat && (c->isfloat = (trans != 0)))

					arrange(NULL);

				break;

			case XA_WM_NORMAL_HINTS:

				setsize(c);

				break;

		}

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

			settitle(c);

			drawtitle(c);

		}

	}

}

static void

unmapnotify(XEvent *e)

{

	Client *c;

	XUnmapEvent *ev = &e->xunmap;

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

		unmanage(c);

}

/* extern */

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

	[ButtonPress] = buttonpress,

	[ConfigureRequest] = configurerequest,

	[DestroyNotify] = destroynotify,

	[EnterNotify] = enternotify,

	[LeaveNotify] = leavenotify,

	[Expose] = expose,

	[KeyPress] = keypress,

	[MapRequest] = maprequest,

	[PropertyNotify] = propertynotify,

	[UnmapNotify] = unmapnotify

};

void

grabkeys()

{

	static unsigned int len = sizeof(key) / sizeof(key[0]);

	unsigned int i;

	KeyCode code;

	for(i = 0; i < len; i++) {

		code = XKeysymToKeycode(dpy, key[i].keysym);