/*

 * (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

synconfig(Client *c, int x, int y, int w, int h, unsigned int border) {

	XEvent synev;

	synev.type = ConfigureNotify;

	synev.xconfigure.display = dpy;

	synev.xconfigure.event = c->win;

	synev.xconfigure.window = c->win;

	synev.xconfigure.x = x;

	synev.xconfigure.y = y;

	synev.xconfigure.width = w;

	synev.xconfigure.height = h;

	synev.xconfigure.border_width = border;

	synev.xconfigure.above = None;

	XSendEvent(dpy, c->win, True, NoEventMask, &synev);

}

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 | StructureNotifyMask, &ev);

		switch (ev.type) {

		default:

			break;

		case ConfigureRequest:

			synconfig(c, c->x, c->y, c->w, c->h, ev.xconfigure.border_width);

			XSync(dpy, False);

			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;

		case DestroyNotify:

		case UnmapNotify:

			XUngrabPointer(dpy, CurrentTime);

			handler[ev.type](&ev);

			return;

		}

	}

}

static void

resizemouse(Client *c) {

	int ocx, ocy;

	int nw, nh;

	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 | StructureNotifyMask, &ev);

		switch(ev.type) {

		default:

			break;

		case ConfigureRequest:

			synconfig(c, c->x, c->y, c->w, c->h, ev.xconfigure.border_width);

			XSync(dpy, False);

			break;

		case Expose:

			handler[Expose](&ev);

			break;

		case MotionNotify:

			XSync(dpy, False);

			if((nw = abs(ocx - ev.xmotion.x)))

				c->w = nw;

			if((nh = abs(ocy - ev.xmotion.y)))

				c->h = nh;

			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;

		case DestroyNotify:

		case UnmapNotify:

			XUngrabPointer(dpy, CurrentTime);

			handler[ev.type](&ev);

			return;

		}

	}

}

static void

buttonpress(XEvent *e) {

	int x;

	Arg a;

	Client *c;

	XButtonPressedEvent *ev = &e->xbutton;

	if(barwin == ev->window) {

		x = 0;

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

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

			if(ev->x < x) {

				if(ev->button == Button1) {

					if(ev->state & MODKEY)

						tag(&a);

					else

						view(&a);

				}

				else if(ev->button == Button3) {

					if(ev->state & MODKEY)

						toggletag(&a);

					else

						toggleview(&a);

				}

				return;

			}

		}

		if(ev->x < x + bmw) {

			if(ev->button == Button1)

				togglemode(NULL);

		}

	}

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

		focus(c);

		if(CLEANMASK(ev->state) != MODKEY)

			return;

		if(ev->button == Button1 && (arrange == dofloat || c->isfloat)) {

			restack(c);

			movemouse(c);

		}

		else if(ev->button == Button2)

			zoom(NULL);

		else if(ev->button == Button3 && (arrange == dofloat || c->isfloat)) {

			restack(c);

			resizemouse(c);

		}

	}

}

static void

configurerequest(XEvent *e) {

	unsigned long newmask;

	Client *c;

	XConfigureRequestEvent *ev = &e->xconfigurerequest;

	XWindowChanges wc;

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

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

			synconfig(c, sx, sy + bh, sw - 2, sh - 2 - bh, ev->border_width);

			XSync(dpy, False);

			return;

		}

		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

			synconfig(c, c->x, c->y, c->w, c->h, c->border);

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

		return;

	if(((c = getclient(ev->window)) || (c = getctitle(ev->window))) && isvisible(c))

		focus(c);

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

		issel = True;

		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);

		drawall();

	}

}

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;

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

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

		if(keysym == key[i].keysym

			&& CLEANMASK(key[i].mod) == CLEANMASK(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 = False;

		drawall();

	}

}

static void

mappingnotify(XEvent *e) {

	XMappingEvent *ev = &e->xmapping;

	XRefreshKeyboardMapping(ev);

	if(ev->request == MappingKeyboard)

		grabkeys();

}

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,