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+/*----------------------------------------------------------------------*
+ * File: scrollbar.C
+ *----------------------------------------------------------------------*
+ *
+ * Copyright (c) 1997,1998 mj olesen <olesen@me.QueensU.CA>
+ * Copyright (c) 1998 Alfredo K. Kojima <kojima@windowmaker.org>
+ * - N*XTstep like scrollbars
+ * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
+ * Copyright (c) 2004-2006 Marc Lehmann <schmorp@schmorp.de>
+ *
+ * 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 3 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" /* NECESSARY */
+#include "rxvt.h" /* NECESSARY */
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * Map or unmap a scrollbar. Returns non-zero upon change of state
+ */
+void
+scrollBar_t::map (int map)
+{
+ if (map)
+ {
+ state = SB_STATE_IDLE;
+
+ if (!win)
+ resize ();
+ else
+ XMapWindow (term->dpy, win);
+ }
+ else
+ {
+ state = SB_STATE_OFF;
+
+ if (win)
+ XUnmapWindow (term->dpy, win);
+ }
+}
+
+void
+scrollBar_t::resize ()
+{
+ int delayed_init = 0;
+ int window_sb_x = 0;
+
+ if (term->option (Opt_scrollBar_right))
+ window_sb_x = term->szHint.width - total_width ();
+
+ update_data ();
+
+ if (!win)
+ {
+ /* create the scrollbar window */
+ win = XCreateSimpleWindow (term->dpy,
+ term->parent,
+ window_sb_x, 0,
+ total_width (),
+ term->szHint.height,
+ 0,
+ term->pix_colors[Color_fg],
+ term->pix_colors[color ()]);
+ XDefineCursor (term->dpy, win, leftptr_cursor);
+
+ XSelectInput (term->dpy, win,
+ ExposureMask | ButtonPressMask | ButtonReleaseMask
+ | Button1MotionMask | Button2MotionMask
+ | Button3MotionMask);
+ term->scrollbar_ev.start (term->display, win);
+
+ delayed_init = 1;
+ }
+ else
+ XMoveResizeWindow (term->dpy, win,
+ window_sb_x, 0,
+ total_width (), term->szHint.height);
+
+ show (1);
+
+ if (delayed_init)
+ XMapWindow (term->dpy, win);
+}
+
+/*
+ * Update current scrollbar view w.r.t. slider heights, etc.
+ */
+int
+scrollBar_t::show (int refresh)
+{
+ int ret;
+
+ if (!state)
+ return 0;
+
+ if (refresh)
+ {
+ int sb_top = term->view_start - term->top_row;
+ int sb_bot = sb_top + (term->nrow - 1);
+ int sb_len = max (term->nrow - 1 - term->top_row, 1);
+ int n = min (min_height (), size ());
+
+ top = beg + (sb_top * (size () - n)) / sb_len;
+ bot = top + ecb_div_ru ((sb_bot - sb_top) * (size () - n), sb_len) + n;
+ /* no change */
+ if (top == last_top
+ && bot == last_bot
+ && (state == last_state
+ || !(state == SB_STATE_UP || state == SB_STATE_DOWN)))
+ return 0;
+ }
+
+ ret = (this->*update) (refresh);
+
+ last_top = top;
+ last_bot = bot;
+ last_state = state;
+
+ return ret;
+}
+
+void
+scrollBar_t::setup (rxvt_term *term)
+{
+ int i;
+ const char *scrollalign, *scrollstyle, *thickness;
+
+ this->term = term;
+ scrollalign = term->rs[Rs_scrollBar_align];
+ scrollstyle = term->rs[Rs_scrollstyle];
+ thickness = term->rs[Rs_scrollBar_thickness];
+
+# if defined(RXVT_SCROLLBAR)
+ style = SB_STYLE_RXVT;
+# elif defined(XTERM_SCROLLBAR)
+ style = SB_STYLE_XTERM;
+# elif defined(NEXT_SCROLLBAR)
+ style = SB_STYLE_NEXT;
+# elif defined(PLAIN_SCROLLBAR)
+ style = SB_STYLE_PLAIN;
+#else
+ style = SB_STYLE_RXVT;
+# endif
+
+# if (defined(NEXT_SCROLLBAR) || defined(XTERM_SCROLLBAR) || defined(PLAIN_SCROLLBAR))
+ if (scrollstyle)
+ {
+# ifdef NEXT_SCROLLBAR
+ if (strncasecmp (scrollstyle, "next", 4) == 0)
+ style = SB_STYLE_NEXT;
+# endif
+# ifdef XTERM_SCROLLBAR
+ if (strncasecmp (scrollstyle, "xterm", 5) == 0)
+ style = SB_STYLE_XTERM;
+# endif
+# ifdef PLAIN_SCROLLBAR
+ if (strncasecmp (scrollstyle, "plain", 5) == 0)
+ style = SB_STYLE_PLAIN;
+# endif
+
+ }
+# endif
+ if (style == SB_STYLE_NEXT)
+ width = SB_WIDTH_NEXT;
+ else if (style == SB_STYLE_XTERM)
+ width = SB_WIDTH_XTERM;
+ else if (style == SB_STYLE_PLAIN)
+ width = SB_WIDTH_PLAIN;
+ else /* if (style == SB_STYLE_RXVT) */
+ width = SB_WIDTH_RXVT;
+
+ if (style != SB_STYLE_NEXT) /* dishonour request - for now */
+ if (thickness && (i = atoi (thickness)) >= SB_WIDTH_MINIMUM)
+ width = min (i, SB_WIDTH_MAXIMUM);
+
+# ifdef RXVT_SCROLLBAR
+ if (! term->option (Opt_scrollBar_floating) && style == SB_STYLE_RXVT)
+ shadow = SHADOW_WIDTH;
+# endif
+
+ /* align = SB_ALIGN_CENTRE; */
+ if (scrollalign)
+ {
+ if (strncasecmp (scrollalign, "top", 3) == 0)
+ align = SB_ALIGN_TOP;
+ else if (strncasecmp (scrollalign, "bottom", 6) == 0)
+ align = SB_ALIGN_BOTTOM;
+ }
+ last_state = SB_STATE_OFF;
+ /* cursor scrollBar: Black-on-White */
+ leftptr_cursor = XCreateFontCursor (term->dpy, XC_left_ptr);
+}
+
+void
+scrollBar_t::destroy ()
+{
+#ifdef XTERM_SCROLLBAR
+ if (xscrollbarGC) XFreeGC (term->dpy, xscrollbarGC);
+ if (ShadowGC) XFreeGC (term->dpy, ShadowGC);
+#endif
+#ifdef PLAIN_SCROLLBAR
+ if (pscrollbarGC) XFreeGC (term->dpy, pscrollbarGC);
+#endif
+#ifdef NEXT_SCROLLBAR
+ if (blackGC) XFreeGC (term->dpy, blackGC);
+ if (whiteGC) XFreeGC (term->dpy, whiteGC);
+ if (grayGC) XFreeGC (term->dpy, grayGC);
+ if (darkGC) XFreeGC (term->dpy, darkGC);
+ if (stippleGC) XFreeGC (term->dpy, stippleGC);
+ if (dimple) XFreePixmap (term->dpy, dimple);
+ if (upArrow) XFreePixmap (term->dpy, upArrow);
+ if (downArrow) XFreePixmap (term->dpy, downArrow);
+ if (upArrowHi) XFreePixmap (term->dpy, upArrowHi);
+ if (downArrowHi) XFreePixmap (term->dpy, downArrowHi);
+#endif
+#ifdef RXVT_SCROLLBAR
+ if (topShadowGC) XFreeGC (term->dpy, topShadowGC);
+ if (botShadowGC) XFreeGC (term->dpy, botShadowGC);
+ if (scrollbarGC) XFreeGC (term->dpy, scrollbarGC);
+#endif
+}
+
+int
+scrollBar_t::color ()
+{
+#ifdef RXVT_SCROLLBAR
+ if (style == SB_STYLE_RXVT && shadow)
+ return Color_trough;
+ else
+#endif
+ return Color_border;
+}
+
+void
+scrollBar_t::update_data ()
+{
+#if defined(PLAIN_SCROLLBAR)
+ if (style == SB_STYLE_PLAIN)
+ {
+ beg = 0;
+ end = term->szHint.height;
+ update = &scrollBar_t::show_plain;
+ }
+#endif
+#if defined(XTERM_SCROLLBAR)
+ if (style == SB_STYLE_XTERM)
+ {
+ beg = 0;
+ end = term->szHint.height;
+ update = &scrollBar_t::show_xterm;
+ }
+#endif
+#if defined(NEXT_SCROLLBAR)
+ if (style == SB_STYLE_NEXT)
+ {
+ beg = 0;
+ end = term->szHint.height - (SB_BUTTON_TOTAL_HEIGHT + SB_PADDING);
+ update = &scrollBar_t::show_next;
+ }
+#endif
+#if defined(RXVT_SCROLLBAR)
+ if (style == SB_STYLE_RXVT)
+ {
+ beg = (width + 1) + shadow;
+ end = term->szHint.height - beg;
+ update = &scrollBar_t::show_rxvt;
+ }
+#endif
+}
+
+/*----------------------- end-of-file (C source) -----------------------*/
+
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