/*--------------------------------*-C-*---------------------------------*
 * File:    scrollbar-xterm.c
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 1997,1998   mj olesen <olesen@me.QueensU.CA>
 * Copyright (c) 1999-2001   Geoff Wing <gcw@pobox.com>
 * Copyright (c) 2004        Jingmin Zhou <jimmyzhou@users.sourceforge.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *----------------------------------------------------------------------*/

#include "../config.h"
#include "rxvt.h"


/*----------------------------------------------------------------------*/
#ifdef HAVE_SCROLLBARS
#ifdef XTERM_SCROLLBAR


#define CHOOSE_GC_FG(R, PIXCOL)	\
    XSetForeground ((R)->Xdisplay, (R)->scrollBar.gc, (PIXCOL))


#define x_stp_width	(8)
#define x_stp_height	(2)
const unsigned char x_stp_bits[] = { 0x55, 0xaa };


/* EXTPROTO */
void
rxvt_scrollbar_init_xterm (rxvt_t* r)
{
    XGCValues       gcvalue;
    unsigned long   gcmask;


    UNSET_GC(r->scrollBar.gc);

    /* Initialize the colors */
    r->scrollBar.xterm_fg = r->pixColorsFocus[Color_fg];
    r->scrollBar.xterm_bg = r->pixColorsFocus[Color_bg];
    r->scrollBar.xterm_shadow = r->pixColorsFocus[Color_border];


    gcvalue.stipple = XCreateBitmapFromData (r->Xdisplay,
	    r->scrollBar.win, (char *)x_stp_bits,
	    x_stp_width, x_stp_height);
    assert (IS_PIXMAP(gcvalue.stipple));

    gcvalue.fill_style = FillOpaqueStippled;
    gcvalue.foreground = r->scrollBar.xterm_fg;
#ifdef TRANSPARENT
    /* set background color when there's no transparent */
    if (!(ISSET_OPTION(r, Opt_transparent) &&
	  ISSET_OPTION(r, Opt_transparent_scrollbar)
	))
#endif
#ifdef BACKGROUND_IMAGE
    /* set background color when there's no bg image */
    if (NOT_PIXMAP(r->scrollBar.pixmap))
#endif
    gcvalue.background = r->scrollBar.xterm_bg;
    gcmask = GCForeground | GCFillStyle | GCStipple;
#ifdef TRANSPARENT
    /* set background color when there's no transparent */
    if (!(ISSET_OPTION(r, Opt_transparent) &&
	  ISSET_OPTION(r, Opt_transparent_scrollbar)
	))
#endif
#ifdef BACKGROUND_IMAGE
    /* set background color when there's no bg image */
    if (NOT_PIXMAP(r->scrollBar.pixmap))
#endif
    gcmask  |= GCBackground;

    r->scrollBar.gc = XCreateGC (r->Xdisplay, r->scrollBar.win,
	    gcmask, &gcvalue);
    assert (IS_GC(r->scrollBar.gc));

#ifdef TRANSPARENT
    /* set background color when there's no transparent */
    if (!(ISSET_OPTION(r, Opt_transparent) &&
	  ISSET_OPTION(r, Opt_transparent_scrollbar)
	))
#endif
#ifdef BACKGROUND_IMAGE
    /* set background color when there's no bg image */
    if (NOT_PIXMAP(r->scrollBar.pixmap))
#endif
	XSetWindowBackground (r->Xdisplay, r->scrollBar.win,
	    r->scrollBar.xterm_bg);
}


void
rxvt_scrollbar_exit_xterm (rxvt_t* r)
{
    /* No resources to free */
}


/* EXTPROTO */
int
rxvt_scrollbar_show_xterm(rxvt_t *r, int update __attribute__((unused)), int last_top, int last_bot, int scroller_len)
{
    int		xsb = 0;
    int		sbwidth = r->scrollBar.width - 1;
    int		clear = 0;


    /* scrollbar slider */
#ifdef TRANSPARENT
    if (ISSET_OPTION(r, Opt_transparent) &&
	ISSET_OPTION(r, Opt_transparent_scrollbar))
	clear = 1;
    else
#endif
#ifdef BACKGROUND_IMAGE
    if (IS_PIXMAP(r->scrollBar.pixmap))
	clear = 1;
    else
#endif
	clear = 0;


    xsb = ISSET_OPTION(r, Opt_scrollBar_right) ? 1 : 0;
    if (last_top < r->scrollBar.top)
	XClearArea(r->Xdisplay, r->scrollBar.win,
	    r->sb_shadow + xsb, last_top,
	    sbwidth, (r->scrollBar.top - last_top), False);

    if (r->scrollBar.bot < last_bot)
	XClearArea(r->Xdisplay, r->scrollBar.win,
	    r->sb_shadow + xsb, r->scrollBar.bot,
	    sbwidth, (last_bot - r->scrollBar.bot + clear), False);

    /* scrollbar slider */
    CHOOSE_GC_FG(r, r->scrollBar.xterm_fg);
    XFillRectangle(r->Xdisplay, r->scrollBar.win, r->scrollBar.gc,
	r->sb_shadow + xsb + 1, r->scrollBar.top,
	sbwidth - 2, scroller_len);

    CHOOSE_GC_FG(r, r->scrollBar.xterm_shadow);
    XDrawLine(r->Xdisplay, r->scrollBar.win, r->scrollBar.gc,
	xsb ? r->sb_shadow : r->sb_shadow + sbwidth, r->scrollBar.beg,
	xsb ? r->sb_shadow : r->sb_shadow + sbwidth, r->scrollBar.end);

    return 1;
}

#endif	/* XTERM_SCROLLBAR */
#endif	/* HAVE_SCROLLBARS */
/*----------------------- end-of-file (C source) -----------------------*/