(Qmouse_wheel): Declare only if MAC_OSX defined.

(mouse_wheel_syms, lispy_mouse_wheel_names): Likewise.
(discard_mouse_events): Discard WHEEL_EVENT events too.
(lispy_wheel_names, wheel_syms): New.
(syms_of_keyboard): Init and staticpro `wheel_syms'.  Init and
staticpro `Qmouse_wheel' and `mouse_wheel_syms' only if MAC_OSX
defined.
(make_lispy_event): Added WHEEL_EVENT handler.

1 files changed, 201 insertions, 6 deletions

diff --git a/src/keyboard.c b/src/keyboard.c
index 9260a175746..14390fc9be9 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -547,7 +547,7 @@ Lisp_Object Qhelp_echo;
 /* Symbols to denote kinds of events.  */
 Lisp_Object Qfunction_key;
 Lisp_Object Qmouse_click;
-#if defined(WINDOWSNT) || defined(MAC_OSX)
+#if defined(MAC_OSX)
 Lisp_Object Qmouse_wheel;
 #endif
 #ifdef WINDOWSNT
@@ -3737,6 +3737,7 @@ discard_mouse_events ()
         sp = kbd_buffer;
 
       if (sp->kind == MOUSE_CLICK_EVENT
+          || sp->kind == WHEEL_EVENT
 #ifdef WINDOWSNT
           || sp->kind == W32_SCROLL_BAR_CLICK_EVENT
 #endif
@@ -4436,7 +4437,8 @@ timer_check (do_it_now)
 static Lisp_Object accent_key_syms;
 static Lisp_Object func_key_syms;
 static Lisp_Object mouse_syms;
-#if defined(WINDOWSNT) || defined(MAC_OSX)
+static Lisp_Object wheel_syms;
+#if defined(MAC_OSX)
 static Lisp_Object mouse_wheel_syms;
 #endif
 static Lisp_Object drag_n_drop_syms;
@@ -4892,7 +4894,12 @@ static char *iso_lispy_function_keys[] =
 
 Lisp_Object Vlispy_mouse_stem;
 
-#if defined(WINDOWSNT) || defined(MAC_OSX)
+static char *lispy_wheel_names[] =
+{
+  "wheel-up", "wheel-down"
+};
+
+#if defined(MAC_OSX)
 /* mouse-wheel events are generated by the wheel on devices such as
    the MS Intellimouse.  The wheel sits in between the left and right
    mouse buttons, and is typically used to scroll or zoom the window
@@ -4905,7 +4912,7 @@ static char *lispy_mouse_wheel_names[] =
   "mouse-wheel"
 };
 
-#endif /* WINDOWSNT */
+#endif /* MAC_OSX */
 
 /* drag-n-drop events are generated when a set of selected files are
    dragged from another application and dropped onto an Emacs window.  */
@@ -5416,6 +5423,192 @@ make_lispy_event (event)
         }
       }
 
+    case WHEEL_EVENT:
+      {
+        Lisp_Object position;
+        Lisp_Object window;
+        Lisp_Object head;
+        
+        position = Qnil;
+        /* Build the position as appropriate for this mouse click.  */
+        enum window_part part;
+        struct frame *f = XFRAME (event->frame_or_window);
+        Lisp_Object posn;
+        Lisp_Object string_info = Qnil;
+        int row, column;
+        int wx, wy;
+
+        /* Ignore wheel events that were made on frame that have been
+           deleted.  */
+        if (! FRAME_LIVE_P (f))
+          return Qnil;
+        
+        /* EVENT->x and EVENT->y are frame-relative pixel
+           coordinates at this place.  Under old redisplay, COLUMN
+           and ROW are set to frame relative glyph coordinates
+           which are then used to determine whether this click is
+           in a menu (non-toolkit version).  */
+        pixel_to_glyph_coords (f, XINT (event->x), XINT (event->y),
+                               &column, &row, NULL, 1);
+
+        /* Set `window' to the window under frame pixel coordinates
+           event->x/event->y.  */
+        window = window_from_coordinates (f, XINT (event->x),
+                                          XINT (event->y),
+                                          &part, &wx, &wy, 0);
+
+        if (!WINDOWP (window))
+          {
+            window = event->frame_or_window;
+            posn = Qnil;
+          }
+        else
+          {
+            /* It's a click in window window at frame coordinates
+               event->x/ event->y.  */
+            struct window *w = XWINDOW (window);
+        
+            /* Set event coordinates to window-relative coordinates
+               for constructing the Lisp event below.  */
+            XSETINT (event->x, wx);
+            XSETINT (event->y, wy);
+        
+            if (part == ON_MODE_LINE || part == ON_HEADER_LINE)
+              {
+                /* Mode line or header line.  Look for a string under
+                   the mouse that may have a `local-map' property.  */
+                Lisp_Object string;
+                int charpos;
+                
+                posn = part == ON_MODE_LINE ? Qmode_line : Qheader_line;
+                string = mode_line_string (w, wx, wy, part, &charpos);
+                if (STRINGP (string))
+                  string_info = Fcons (string, make_number (charpos));
+              }
+            else if (part == ON_VERTICAL_BORDER)
+              posn = Qvertical_line;
+            else if (part == ON_LEFT_MARGIN || part == ON_RIGHT_MARGIN)
+              {
+                int charpos;
+                Lisp_Object object = marginal_area_string (w, wx, wy, part,
+                                                           &charpos);
+                posn = (part == ON_LEFT_MARGIN) ? Qleft_margin : Qright_margin;
+                if (STRINGP (object))
+                  string_info = Fcons (object, make_number (charpos));
+              }
+            else
+              {
+                Lisp_Object object;
+                struct display_pos p;
+                buffer_posn_from_coords (w, &wx, &wy, &object, &p);
+                posn = make_number (CHARPOS (p.pos));
+                if (STRINGP (object))
+                  string_info
+                    = Fcons (object,
+                             make_number (CHARPOS (p.string_pos)));
+              }
+          }
+        
+        position
+          = Fcons (window,
+                   Fcons (posn,
+                          Fcons (Fcons (event->x, event->y),
+                                 Fcons (make_number (event->timestamp),
+                                        (NILP (string_info)
+                                         ? Qnil
+                                         : Fcons (string_info, Qnil))))));
+
+        /* Set double or triple modifiers to indicate the wheel speed.  */
+        {
+          /* On window-system frames, use the value of
+             double-click-fuzz as is.  On other frames, interpret it
+             as a multiple of 1/8 characters.  */
+          struct frame *f;
+          int fuzz;
+          int is_double;
+
+          if (WINDOWP (event->frame_or_window))
+            f = XFRAME (XWINDOW (event->frame_or_window)->frame);
+          else if (FRAMEP (event->frame_or_window))
+            f = XFRAME (event->frame_or_window);
+          else
+            abort ();
+
+          if (FRAME_WINDOW_P (f))
+            fuzz = double_click_fuzz;
+          else
+            fuzz = double_click_fuzz / 8;
+
+          is_double = (last_mouse_button < 0
+                       && (abs (XINT (event->x) - last_mouse_x) <= fuzz)
+                       && (abs (XINT (event->y) - last_mouse_y) <= fuzz)
+                       && button_down_time != 0
+                       && (EQ (Vdouble_click_time, Qt)
+                           || (INTEGERP (Vdouble_click_time)
+                               && ((int)(event->timestamp - button_down_time)
+                                   < XINT (Vdouble_click_time)))));
+          if (is_double)
+            {
+              double_click_count++;
+              event->modifiers |= ((double_click_count > 2)
+                                   ? triple_modifier
+                                   : double_modifier);
+            }
+          else
+            {
+              double_click_count = 1;
+              event->modifiers |= click_modifier;
+            }
+        
+          button_down_time = event->timestamp;
+          /* Use a negative value to distinguish wheel from mouse button.  */
+          last_mouse_button = -1;
+          last_mouse_x = XINT (event->x);
+          last_mouse_y = XINT (event->y);
+        }
+        
+        {
+          int symbol_num;
+        
+          if (event->modifiers & up_modifier)
+            {
+              /* Emit a wheel-up event.  */
+              event->modifiers &= ~up_modifier;
+              symbol_num = 0;
+            }
+          else if (event->modifiers & down_modifier)
+            {
+              /* Emit a wheel-down event.  */
+              event->modifiers &= ~down_modifier;
+              symbol_num = 1;
+            }
+          else
+            /* Every wheel event should either have the down_modifier or
+               the up_modifier set.  */
+            abort ();
+        
+          /* Get the symbol we should use for the wheel event.  */
+          head = modify_event_symbol (symbol_num,
+                                      event->modifiers,
+                                      Qmouse_click,
+                                      Qnil,
+                                      lispy_wheel_names,
+                                      &wheel_syms,
+                                      ASIZE (wheel_syms));
+        }
+        
+        if (event->modifiers & (double_modifier | triple_modifier))
+          return Fcons (head,
+                        Fcons (position,
+                               Fcons (make_number (double_click_count),
+                                      Qnil)));
+        else
+          return Fcons (head,
+                        Fcons (position,
+                               Qnil));
+      }
+
+
 #ifdef USE_TOOLKIT_SCROLL_BARS
 
       /* We don't have down and up events if using toolkit scroll bars,
@@ -10675,7 +10868,7 @@ syms_of_keyboard ()
   staticpro (&Qfunction_key);
   Qmouse_click = intern ("mouse-click");
   staticpro (&Qmouse_click);
-#if defined(WINDOWSNT) || defined(MAC_OSX)
+#if defined(MAC_OSX)
   Qmouse_wheel = intern ("mouse-wheel");
   staticpro (&Qmouse_wheel);
 #endif
@@ -10793,6 +10986,8 @@ syms_of_keyboard ()
   staticpro (&button_down_location);
   mouse_syms = Fmake_vector (make_number (1), Qnil);
   staticpro (&mouse_syms);
+  wheel_syms = Fmake_vector (make_number (2), Qnil);
+  staticpro (&wheel_syms);
 
   {
     int i;
@@ -10827,7 +11022,7 @@ syms_of_keyboard ()
   func_key_syms = Qnil;
   staticpro (&func_key_syms);
 
-#if defined(WINDOWSNT) || defined(MAC_OSX)
+#if defined(MAC_OSX)
   mouse_wheel_syms = Qnil;
   staticpro (&mouse_wheel_syms);
   drag_n_drop_syms = Qnil;