/* input event and data structure translation */

#include "x11-inc.h"

#include <u.h>
#include <libc.h>
#include <draw.h>
#include <memdraw.h>
#include <mouse.h>
#include <cursor.h>
#include <keyboard.h>
#include "x11-memdraw.h"

int
xtoplan9kbd(XEvent *e)
{
	int ind, k, md;

	md = e->xkey.state;
	ind = 0;
	if(md & ShiftMask)
		ind = 1;

	k = XKeycodeToKeysym(e->xany.display, (KeyCode)e->xkey.keycode, ind);
	if(k == XK_Multi_key || k == NoSymbol)
		return -1;

	if(k&0xFF00){
		switch(k){
		case XK_BackSpace:
		case XK_Tab:
		case XK_Escape:
		case XK_Delete:
		case XK_KP_0:
		case XK_KP_1:
		case XK_KP_2:
		case XK_KP_3:
		case XK_KP_4:
		case XK_KP_5:
		case XK_KP_6:
		case XK_KP_7:
		case XK_KP_8:
		case XK_KP_9:
		case XK_KP_Divide:
		case XK_KP_Multiply:
		case XK_KP_Subtract:
		case XK_KP_Add:
		case XK_KP_Decimal:
			k &= 0x7F;
			break;
		case XK_Linefeed:
			k = '\r';
			break;
		case XK_KP_Space:
			k = ' ';
			break;
		case XK_Home:
		case XK_KP_Home:
			k = Khome;
			break;
		case XK_Left:
		case XK_KP_Left:
			k = Kleft;
			break;
		case XK_Up:
		case XK_KP_Up:
			k = Kup;
			break;
		case XK_Down:
		case XK_KP_Down:
			k = Kdown;
			break;
		case XK_Right:
		case XK_KP_Right:
			k = Kright;
			break;
		case XK_Page_Down:
		case XK_KP_Page_Down:
			k = Kpgdown;
			break;
		case XK_End:
		case XK_KP_End:
			k = Kend;
			break;
		case XK_Page_Up:	
		case XK_KP_Page_Up:
			k = Kpgup;
			break;
		case XK_Insert:
		case XK_KP_Insert:
			k = Kins;
			break;
		case XK_KP_Enter:
		case XK_Return:
			k = '\n';
			break;
		case XK_Alt_L:
		case XK_Alt_R:
			k = Kalt;
			break;
		default:		/* not ISO-1 or tty control */
			return -1;
		}
	}

	/* Compensate for servers that call a minus a hyphen */
	if(k == XK_hyphen)
		k = XK_minus;
	/* Do control mapping ourselves if translator doesn't */
	if(e->xkey.state&ControlMask)
		k &= 0x9f;
	if(k == NoSymbol) {
		return -1;
	}

	/* BUG: could/should do Alt translation here! */
	return k;
}

int
xtoplan9mouse(XEvent *e, Mouse *m)
{
	int s;
	XButtonEvent *be;
	XMotionEvent *me;

	switch(e->type){
	case ButtonPress:
		be = (XButtonEvent*)e;
		/* BUG? on mac need to inherit these from elsewhere? */
		m->xy.x = be->x;
		m->xy.y = be->y;
		s = be->state;
		m->msec = be->time;
		switch(be->button){
		case 1:
			s |= Button1Mask;
			break;
		case 2:
			s |= Button2Mask;
			break;
		case 3:
			s |= Button3Mask;
			break;
		}
		break;
	case ButtonRelease:
		be = (XButtonEvent*)e;
		m->xy.x = be->x;
		m->xy.y = be->y;
		s = be->state;
		m->msec = be->time;
		switch(be->button){
		case 1:
			s &= ~Button1Mask;
			break;
		case 2:
			s &= ~Button2Mask;
			break;
		case 3:
			s &= ~Button3Mask;
			break;
		}
		break;

	case MotionNotify:
		me = (XMotionEvent*)e;
		s = me->state;
		m->xy.x = me->x;
		m->xy.y = me->y;
		m->msec = me->time;
		break;

	default:
		return -1;
	}

	m->buttons = 0;
	if(s & Button1Mask)
		m->buttons |= 1;
	if(s & Button2Mask)
		m->buttons |= 2;
	if(s & Button3Mask)
		m->buttons |= 4;

	return 0;
}

void
xmoveto(Point p)
{
	XWarpPointer(_x.display, None, _x.drawable, 0, 0, 0, 0, p.x, p.y);
	XFlush(_x.display);
}

static int
revbyte(int b)
{
	int r;

	r = 0;
	r |= (b&0x01) << 7;
	r |= (b&0x02) << 5;
	r |= (b&0x04) << 3;
	r |= (b&0x08) << 1;
	r |= (b&0x10) >> 1;
	r |= (b&0x20) >> 3;
	r |= (b&0x40) >> 5;
	r |= (b&0x80) >> 7;
	return r;
}

static void
xcursorarrow(void)
{
	if(_x.cursor != 0){
		XFreeCursor(_x.display, _x.cursor);
		_x.cursor = 0;
	}
	XUndefineCursor(_x.display, _x.drawable);
	XFlush(_x.display);
}


void
xsetcursor(Cursor *c)
{
	XColor fg, bg;
	XCursor xc;
	Pixmap xsrc, xmask;
	int i;
	uchar src[2*16], mask[2*16];

	if(c == nil){
		xcursorarrow();
		return;
	}
	for(i=0; i<2*16; i++){
		src[i] = revbyte(c->set[i]);
		mask[i] = revbyte(c->set[i] | c->clr[i]);
	}

	fg = _x.map[0];
	bg = _x.map[255];
	xsrc = XCreateBitmapFromData(_x.display, _x.drawable, src, 16, 16);
	xmask = XCreateBitmapFromData(_x.display, _x.drawable, mask, 16, 16);
	xc = XCreatePixmapCursor(_x.display, xsrc, xmask, &fg, &bg, -c->offset.x, -c->offset.y);
	if(xc != 0) {
		XDefineCursor(_x.display, _x.drawable, xc);
		if(_x.cursor != 0)
			XFreeCursor(_x.display, _x.cursor);
		_x.cursor = xc;
	}
	XFreePixmap(_x.display, xsrc);
	XFreePixmap(_x.display, xmask);
	XFlush(_x.display);
}