/* Copyright ©2007-2010 Kris Maglione <maglione.k at Gmail>
 * See LICENSE file for license details.
 */
#include "x11.h"

int	(*xlib_errorhandler) (Display*, XErrorEvent*);

Map	windowmap;
Map	atommap;
Map	atomnamemap;
static MapEnt*	wbucket[137];
static MapEnt*	abucket[137];
static MapEnt*	anamebucket[137];

static int
Afmt(Fmt *f) {

	return fmtstrcpy(f, atomname(va_arg(f->args, Atom)));
}

static int
Lfmt(Fmt *f) {
	Color c;

#define fix(c, m) (ushort)((c.alpha ? ((ulong)c.m * 0xffff) / c.alpha : 0) >> 8)
	c = va_arg(f->args, Color);
	return fmtprint(f, c.alpha < 0xff00 ? "rgba:%02uhx/%02uhx/%02uhx/%02uhx"
					    : "#%02uhx%02uhx%02uhx",
			fix(c, red), fix(c, green), fix(c, blue), c.alpha >> 8);
#undef fix
}

static int
Pfmt(Fmt *f) {
	Point p;

	p = va_arg(f->args, Point);
	return fmtprint(f, "(%d,%d)", p.x, p.y);
}

static int
Rfmt(Fmt *f) {
	Rectangle r;

	r = va_arg(f->args, Rectangle);
	return fmtprint(f, "%P+%dx%d", r.min, Dx(r), Dy(r));
}

static int
Wfmt(Fmt *f) {
	Window *w;

	w = va_arg(f->args, Window*);
	if(w == nil)
		return fmtstrcpy(f, "<nil>");
	return fmtprint(f, "0x%ulx", w->xid);
}

void
initdisplay(void) {
	display = XOpenDisplay(nil);
	if(display == nil)
		fatal("Can't open display");
	scr.screen = DefaultScreen(display);
	scr.colormap = DefaultColormap(display, scr.screen);
	scr.visual = DefaultVisual(display, scr.screen);
	scr.gc = DefaultGC(display, scr.screen);
	scr.depth = DefaultDepth(display, scr.screen);

	scr.root.xid = RootWindow(display, scr.screen);
	scr.root.r = Rect(0, 0,
			  DisplayWidth(display, scr.screen),
			  DisplayHeight(display, scr.screen));
	scr.rect = scr.root.r;

	scr.root.parent = &scr.root;

	windowmap.bucket = wbucket;
	windowmap.nhash = nelem(wbucket);
	atommap.bucket = abucket;
	atommap.nhash = nelem(abucket);
	atomnamemap.bucket = anamebucket;
	atomnamemap.nhash = nelem(anamebucket);

	fmtinstall('A', Afmt);
	fmtinstall('L', Lfmt);
	fmtinstall('R', Rfmt);
	fmtinstall('P', Pfmt);
	fmtinstall('W', Wfmt);

	xlib_errorhandler = XSetErrorHandler(errorhandler);
}