/*
 * (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>

/* static */

typedef struct {
	unsigned long mod;
	KeySym keysym;
	void (*func)(Arg *arg);
	Arg arg;
} Key;

KEYS

#define CLEANMASK(mask) (mask & ~(NUMLOCKMASK | LockMask))

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 < ntags; a.i++) {
				x += textw(tags[a.i]);
				if(ev->x < x) {
					view(&a);
					break;
				}
			}
			break;
		case Button4:
			viewnext(&a);
			break;
		case Button5:
			viewprev(&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;
	XEvent synev;
	XWindowChanges wc;
	unsigned long newmask;

	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 = ev->border_width;
		gravitate(c, False);
		wc.x = c->x;
		wc.y = c->y;
		wc.width = c->w;
		wc.height = c->h;
		newmask = ev->value_mask & (~(CWSibling | CWStackMode | CWBorderWidth));
		if(newmask)
			XConfigureWindow(dpy, c->win, newmask, &wc);
		else {
			synev.type = ConfigureNotify;
			synev.xconfigure.display = dpy;
			synev.xconfigure.event = c->win;
			synev.xconfigure.window = c->win;
			synev.xconfigure.x = c->x;
			synev.xconfigure.y = c->y;
			synev.xconfigure.width = c->w;
			synev.xconfigure.height = c->h;
			synev.xconfigure.border_width = c->border;
			synev.xconfigure.above = None;
			/* Send synthetic ConfigureNotify */
			XSendEvent(dpy, c->win, True, NoEventMask, &synev);
		}
		XSync(dpy, False);
		if(c->isfloat)
			resize(c, False, TopLeft);
		else
			arrange(NULL);
	}
	else {
		wc.x = ev->x;
		wc.y = ev->y;
		wc.width = ev->width;
		wc.height = ev->height;
		wc.border_width = ev->border_width;
		wc.sibling = ev->above;
		wc.stack_mode = ev->detail;
		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)) || (c = getctitle(ev->window)))
		focus(c);
	else if(ev->window == root)
		issel = True;
}

static void
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