Start redesigning portable mouse highlight. Not compiled.

 xdisp.c (get_tool_bar_item, handle_tool_bar_click)
 (note_tool_bar_highlight, draw_glyphs, erase_phys_cursor)
 (show_mouse_face, clear_mouse_face, coords_in_mouse_face_p)
 (note_mode_line_or_margin_highlight, note_mouse_highlight)
 (x_clear_window_mouse_face, cancel_mouse_face, expose_frame):
 Replace Display_Info with Mouse_HLInfo everywhere where
 mouse_face_* members were accessed for mouse highlight purposes.
 frame.h (MOUSE_HL_INFO): New macro.
 lisp.h (Mouse_HLInfo): New data type.
 xterm.h (struct x_display_info):
 w32term.h (struct w32_display_info):
 nsterm.h (struct ns_display_info):
 termchar.h (struct tty_display_info): Use it instead of
 mouse_face_* members.
 dispextern.h (DPYINFO_DEFINED): Remove definition.
 (FRAME_X_DISPLAY_INFO): Remove definition.
 (show_mouse_face, clear_mouse_face): Update type of 1st argument.

1 files changed, 3 insertions, 30 deletions

diff --git a/src/xterm.h b/src/xterm.h
index d884945f985..ec99a659b8e 100644
--- a/src/xterm.h
+++ b/src/xterm.h
@@ -190,36 +190,9 @@ struct x_display_info
   /* Reusable Graphics Context for drawing a cursor in a non-default face. */
   GC scratch_cursor_gc;
 
-  /* These variables describe the range of text currently shown in its
-     mouse-face, together with the window they apply to.  As long as
-     the mouse stays within this range, we need not redraw anything on
-     its account.  Rows and columns are glyph matrix positions in
-     MOUSE_FACE_WINDOW.  */
-  int mouse_face_beg_row, mouse_face_beg_col;
-  int mouse_face_beg_x, mouse_face_beg_y;
-  int mouse_face_end_row, mouse_face_end_col;
-  int mouse_face_end_x, mouse_face_end_y;
-  int mouse_face_past_end;
-  Lisp_Object mouse_face_window;
-  int mouse_face_face_id;
-  Lisp_Object mouse_face_overlay;
-
-  /* 1 if a mouse motion event came and we didn't handle it right away because
-     gc was in progress.  */
-  int mouse_face_deferred_gc;
-
-  /* FRAME and X, Y position of mouse when last checked for
-     highlighting.  X and Y can be negative or out of range for the frame.  */
-  struct frame *mouse_face_mouse_frame;
-  int mouse_face_mouse_x, mouse_face_mouse_y;
-
-  /* Nonzero means defer mouse-motion highlighting.  */
-  int mouse_face_defer;
-
-  /* Nonzero means that the mouse highlight should not be shown.  */
-  int mouse_face_hidden;
-
-  int mouse_face_image_state;
+  /* Information about the range of text currently shown in
+     mouse-face.  */
+  Mouse_HLInfo mouse_highlight;
 
   char *x_id_name;