--- rxvt-unicode/src/scrollbar.h	2008/01/29 13:57:23	1.13
+++ rxvt-unicode/src/scrollbar.h	2011/08/28 18:48:41	1.27
@@ -2,39 +2,80 @@
 #define SCROLLBAR_H
 
 #include <X11/Xlib.h>
+#include "rxvtutil.h"
 
 struct rxvt_term;
 
-#define R_SB_NEXT               1
-#define R_SB_XTERM              2
-#define R_SB_PLAIN              4
-#define R_SB_RXVT               8
+#define SB_WIDTH_NEXT           19
+#define SB_WIDTH_XTERM          15
+#define SB_WIDTH_PLAIN          7
+#ifndef SB_WIDTH_RXVT
+# define SB_WIDTH_RXVT          10
+#endif
+
+/*
+ * NeXT scrollbar defines
+ */
+#define SB_PADDING              1
+#define SB_BORDER_WIDTH         1
+#define SB_BEVEL_WIDTH_UPPER_LEFT       1
+#define SB_BEVEL_WIDTH_LOWER_RIGHT      2
+#define SB_LEFT_PADDING         (SB_PADDING + SB_BORDER_WIDTH)
+#define SB_MARGIN_SPACE         (SB_PADDING * 2)
+#define SB_BUTTON_WIDTH         (SB_WIDTH_NEXT - SB_MARGIN_SPACE - SB_BORDER_WIDTH)
+#define SB_BUTTON_HEIGHT        (SB_BUTTON_WIDTH)
+#define SB_BUTTON_SINGLE_HEIGHT (SB_BUTTON_HEIGHT + SB_PADDING)
+#define SB_BUTTON_BOTH_HEIGHT   (SB_BUTTON_SINGLE_HEIGHT * 2)
+#define SB_BUTTON_TOTAL_HEIGHT  (SB_BUTTON_BOTH_HEIGHT + SB_PADDING)
+#define SB_BUTTON_BEVEL_X       (SB_LEFT_PADDING)
+#define SB_BUTTON_FACE_X        (SB_BUTTON_BEVEL_X + SB_BEVEL_WIDTH_UPPER_LEFT)
+#define SB_THUMB_MIN_HEIGHT     (SB_BUTTON_WIDTH - (SB_PADDING * 2))
 
 enum sb_state {
-  STATE_IDLE = 1,
+  STATE_OFF,
+  STATE_IDLE,
   STATE_MOTION,
   STATE_UP,
   STATE_DOWN,
 };
 
-struct scrollBar_t {
-  char            state;        /* scrollbar state                          */
+enum sb_style {
+  R_SB_NEXT  = 1,
+  R_SB_XTERM = 2,
+  R_SB_PLAIN = 4,
+  R_SB_RXVT  = 8,
+};
+
+enum sb_align {
+  R_SB_ALIGN_CENTRE,
+  R_SB_ALIGN_TOP,
+  R_SB_ALIGN_BOTTOM,
+};
+
+struct scrollBar_t
+{
+  rxvt_term *term;
+  sb_state        state;        /* scrollbar state                          */
   char            init;         /* scrollbar has been initialised           */
-  unsigned int    beg;          /* slider sub-window begin height           */
-  unsigned int    end;          /* slider sub-window end height             */
-  unsigned int    top;          /* slider top position                      */
-  unsigned int    bot;          /* slider bottom position                   */
-  unsigned int    style;        /* style: rxvt, xterm, next                 */
-  unsigned int    width;        /* scrollbar width                          */
+  int             beg;          /* slider sub-window begin height           */
+  int             end;          /* slider sub-window end height             */
+  int             top;          /* slider top position                      */
+  int             bot;          /* slider bottom position                   */
+  sb_style        style;        /* style: rxvt, xterm, next                 */
+  int             width;        /* scrollbar width                          */
   int             shadow;       /* scrollbar shadow width                   */
   int             last_bot;     /* scrollbar last bottom position           */
   int             last_top;     /* scrollbar last top position              */
   int             last_state;   /* scrollbar last state                     */
-  int             len;
-  unsigned char   align;
+  sb_align        align;
   Window          win;
   Cursor          leftptr_cursor;
-  int             (rxvt_term::*update)(int, int, int, int);
+  int             (scrollBar_t::*update)(int);
+  void setup (rxvt_term *);
+  void resize ();
+  void map (int);
+  int show (int);
+  void destroy ();
 
   bool upButton (int y)
   {
@@ -52,50 +93,76 @@
       return y > end;
     return false;
   }
-};
+  int min_height ()
+  {
+    return style == R_SB_NEXT ? SB_THUMB_MIN_HEIGHT : 10;
+  }
+  int size ()
+  {
+    return max (end - beg - min_height (), 0);
+  }
+  int total_width ()
+  {
+    return width + shadow * 2;
+  }
+  bool above_slider (int y)
+  {
+    return y < top;
+  }
+  bool below_slider (int y)
+  {
+    return y > bot;
+  }
+  int position (int y)
+  {
+    return y - beg;
+  }
 
-#define scrollbar_TotalWidth()  (scrollBar.width + scrollBar.shadow * 2)
 
-#define SCROLLNEXT_MINHEIGHT    SB_THUMB_MIN_HEIGHT
-#define SCROLLRXVT_MINHEIGHT    10
+#if defined(NEXT_SCROLLBAR)
+  GC              blackGC,
+                  whiteGC,
+                  grayGC,
+                  darkGC,
+                  stippleGC;
+  Pixmap          dimple,
+                  upArrow,
+                  downArrow,
+                  upArrowHi,
+                  downArrowHi;
+#endif
 
-#define scrollbar_minheight()   (scrollBar.style == R_SB_NEXT        \
-                                 ? SCROLLNEXT_MINHEIGHT                 \
-                                 : SCROLLRXVT_MINHEIGHT)
-#define scrollbar_above_slider(y)       ((y) < scrollBar.top)
-#define scrollbar_below_slider(y)       ((y) > scrollBar.bot)
-#define scrollbar_position(y)           ((y) - scrollBar.beg)
-#define scrollbar_size()                (scrollBar.end - scrollBar.beg \
-                                         - scrollbar_minheight ())
-
-#define R_SB_ALIGN_CENTRE       0
-#define R_SB_ALIGN_TOP          1
-#define R_SB_ALIGN_BOTTOM       2
+#if defined(RXVT_SCROLLBAR)
+  GC              scrollbarGC,
+                  topShadowGC,
+                  botShadowGC;
+#endif
 
-#define SB_WIDTH_NEXT           19
-#define SB_WIDTH_XTERM          15
-#define SB_WIDTH_PLAIN          7
-#ifndef SB_WIDTH_RXVT
-# define SB_WIDTH_RXVT          10
+#if defined(XTERM_SCROLLBAR)
+  GC              xscrollbarGC,
+                  ShadowGC;
 #endif
 
-/*
- * NeXT scrollbar defines
- */
-#define SB_PADDING              1
-#define SB_BORDER_WIDTH         1
-#define SB_BEVEL_WIDTH_UPPER_LEFT       1
-#define SB_BEVEL_WIDTH_LOWER_RIGHT      2
-#define SB_LEFT_PADDING         (SB_PADDING + SB_BORDER_WIDTH)
-#define SB_MARGIN_SPACE         (SB_PADDING * 2)
-#define SB_BUTTON_WIDTH         (SB_WIDTH_NEXT - SB_MARGIN_SPACE - SB_BORDER_WIDTH)
-#define SB_BUTTON_HEIGHT        (SB_BUTTON_WIDTH)
-#define SB_BUTTON_SINGLE_HEIGHT (SB_BUTTON_HEIGHT + SB_PADDING)
-#define SB_BUTTON_BOTH_HEIGHT   (SB_BUTTON_SINGLE_HEIGHT * 2)
-#define SB_BUTTON_TOTAL_HEIGHT  (SB_BUTTON_BOTH_HEIGHT + SB_PADDING)
-#define SB_BUTTON_BEVEL_X       (SB_LEFT_PADDING)
-#define SB_BUTTON_FACE_X        (SB_BUTTON_BEVEL_X + SB_BEVEL_WIDTH_UPPER_LEFT)
-#define SB_THUMB_MIN_HEIGHT     (SB_BUTTON_WIDTH - (SB_PADDING * 2))
+#if defined(PLAIN_SCROLLBAR)
+  GC              pscrollbarGC;
+#endif
+
+private:
+  // update style dependent data
+  void update_data ();
+
+  // scrollbar-next.C
+  int show_next (int);
+  // scrollbar-rxvt.C
+  int show_rxvt (int);
+  // scrollbar-xterm.C
+  int show_xterm (int);
+  // scrollbar-plain.C
+  int show_plain (int);
+
+  void init_next ();
+};
+
  /*
   *    +-------------+
   *    |             | <---< SB_PADDING