/*

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

 * See LICENSE file for license details.

 */

#include "dwm.h"

#include <stdlib.h>

#include <string.h>

#include <X11/Xatom.h>

#include <X11/Xutil.h>

/* static functions */

static void

resizetitle(Client *c)

{

	int i;

	c->tw = 0;

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

		if(c->tags[i])

			c->tw += textw(tags[i]);

	c->tw += textw(c->name);

	if(c->tw > c->w)

		c->tw = c->w + 2;

	c->tx = c->x + c->w - c->tw + 2;

	c->ty = c->y;

	if(isvisible(c))

		XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);

	else

		XMoveResizeWindow(dpy, c->title, c->tx + 2 * sw, c->ty, c->tw, c->th);

}

static int

xerrordummy(Display *dsply, XErrorEvent *ee)

{

	return 0;

}

/* extern functions */

void

ban(Client *c)

{

	XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);

	XMoveWindow(dpy, c->title, c->tx + 2 * sw, c->ty);

}

void

focus(Client *c)

{

	Client *old = sel;

	if (!issel)

		return;

		togglemax(NULL);

	sel = c;

		drawtitle(old);

	drawtitle(c);

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

}

void

focusnext(Arg *arg)

{

	Client *c;

	if(!sel)

		return;

	if(!(c = getnext(sel->next)))

		c = getnext(clients);

	if(c) {

		focus(c);

		restack();

	}

}

void

focusprev(Arg *arg)

{

	Client *c;

	if(!sel)

		return;

	if(!(c = getprev(sel->prev))) {

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

		c = getprev(c);

	}

	if(c) {

		focus(c);

		restack();

	}

}

Client *

getclient(Window w)

{

	Client *c;

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

		if(c->win == w)

			return c;

	return NULL;

}

Client *

getctitle(Window w)

{

	Client *c;

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

		if(c->title == w)

			return c;

	return NULL;

}

void

gravitate(Client *c, Bool invert)

{

	int dx = 0, dy = 0;

	switch(c->grav) {

	default:

		break;

	case StaticGravity:

	case NorthWestGravity:

	case NorthGravity:

	case NorthEastGravity:

		dy = c->border;

		break;

	case EastGravity:

	case CenterGravity:

	case WestGravity:

		dy = -(c->h / 2) + c->border;

		break;

	case SouthEastGravity:

	case SouthGravity:

	case SouthWestGravity:

		dy = -(c->h);

		break;

	}

	switch (c->grav) {

	default:

		break;

	case StaticGravity:

	case NorthWestGravity:

	case WestGravity:

	case SouthWestGravity:

		dx = c->border;

		break;

	case NorthGravity:

	case CenterGravity:

	case SouthGravity:

		dx = -(c->w / 2) + c->border;

		break;

	case NorthEastGravity:

	case EastGravity:

	case SouthEastGravity:

		dx = -(c->w + c->border);

		break;

	}

	if(invert) {

		dx = -dx;

		dy = -dy;

	}

	c->x += dx;

	c->y += dy;

}

void

killclient(Arg *arg)

{

	if(!sel)

		return;

	if(sel->proto & PROTODELWIN)

		sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);

	else

		XKillClient(dpy, sel->win);

}

void

manage(Window w, XWindowAttributes *wa)

{

	Client *c, *tc;

	Window trans;

	XSetWindowAttributes twa;

	c = emallocz(sizeof(Client));

	c->tags = emallocz(ntags * sizeof(Bool));

	c->win = w;

	c->x = c->tx = wa->x;

	c->y = c->ty = wa->y;

	c->w = c->tw = wa->width;

	c->h = wa->height;

	c->th = bh;

	c->border = 0;

	setsize(c);

	if(c->x + c->w + 2 > sw)

		c->x = sw - c->w - 2;

	if(c->x < 0)

		c->x = 0;

	if(c->y + c->h + 2 > sh)

		c->y = sh - c->h - 2;

	if(c->h != sh && c->y < bh)

		c->y = bh;

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

	XSelectInput(dpy, c->win,

		StructureNotifyMask | PropertyChangeMask | EnterWindowMask);

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

	twa.override_redirect = 1;

	twa.background_pixmap = ParentRelative;

	twa.event_mask = ExposureMask | EnterWindowMask;

	c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,

			0, DefaultDepth(dpy, screen), CopyFromParent,

			DefaultVisual(dpy, screen),

			CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);

	if(clients)

		clients->prev = c;

	c->next = clients;

	clients = c;

	settags(c);

	if(!c->isfloat)

		c->isfloat = trans

			|| (c->maxw && c->minw &&

				c->maxw == c->minw && c->maxh == c->minh);

	settitle(c);

	if(isvisible(c))

		sel = c;

	arrange(NULL);

	XMapWindow(dpy, c->win);

	XMapWindow(dpy, c->title);

	if(isvisible(c))

		focus(c);

}

void

resize(Client *c, Bool sizehints, Corner sticky)

{

	int bottom = c->y + c->h;

	int right = c->x + c->w;

	XWindowChanges wc;

	if(sizehints) {

		if(c->incw)

			c->w -= (c->w - c->basew) % c->incw;

		if(c->inch)

			c->h -= (c->h - c->baseh) % c->inch;

		if(c->minw && c->w < c->minw)

			c->w = c->minw;

		if(c->minh && c->h < c->minh)

			c->h = c->minh;

		if(c->maxw && c->w > c->maxw)

			c->w = c->maxw;

		if(c->maxh && c->h > c->maxh)

			c->h = c->maxh;

	}

	if(sticky == TopRight || sticky == BotRight)

		c->x = right - c->w;

	if(sticky == BotLeft || sticky == BotRight)

		c->y = bottom - c->h;

	resizetitle(c);

	wc.x = c->x;

	wc.y = c->y;

	wc.width = c->w;

	wc.height = c->h;

	if(c->w == sw && c->h == sh)

		wc.border_width = 0;

	else

		wc.border_width = 1;

	XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);

	XSync(dpy, False);

}

void

setsize(Client *c)

{

	long msize;

	XSizeHints size;

	if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)

		size.flags = PSize;

	c->flags = size.flags;

	if(c->flags & PBaseSize) {

		c->basew = size.base_width;

		c->baseh = size.base_height;