Changes for supporting mouse/modeline highlight and help echo features:

(dos_set_window_size) [__DJGPP__ > 1]: If the frame
dimensions changed, invalidate the mouse highlight info.
(disable_mouse_highlight, help_echo, previous_help_echo): New
variables.
(IT_set_mouse_pointer, show_mouse_face, clear_mouse_face)
(fast_find_position, IT_note_mode_line_highlight)
(IT_note_mouse_highlight): New functions.
(IT_update_begin): If the redisplay affects the window where the
mouse highlight is, clear the highlight.  If the frame where the
highlight was displayed was killed, invalidate the highlight
info.
(IT_update_end): Reset the highlight flag.  Reset the mouse
highlight-defer flag.
(IT_frame_up_to_date): New function, if mouse highlight was
deferred due to GC, do it now.
(internal_terminal_init): Initialize mouse-highlight related
members of the_only_x_display.  Assign IT_frame_up_to_date to
frame_up_to_date_hook.
(dos_rawgetc): If the mouse moved, update mouse highlight.  If
help_echo changed value, generate a HELP_EVENT event.
(syms_of_msdos): Staticpro help_echo and previous_help_echo.

1 files changed, 22 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index b9331c53ff4..3de622a7d14 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,27 @@
 1999-12-28  Eli Zaretskii  <eliz@is.elta.co.il>
 
+        * msdos.c (dos_set_window_size) [__DJGPP__ > 1]: If the frame
+        dimensions changed, invalidate the mouse highlight info.
+        (disable_mouse_highlight, help_echo, previous_help_echo): New
+        variables.
+        (IT_set_mouse_pointer, show_mouse_face, clear_mouse_face)
+        (fast_find_position, IT_note_mode_line_highlight)
+        (IT_note_mouse_highlight): New functions.
+        (IT_update_begin): If the redisplay affects the window where the
+        mouse highlight is, clear the highlight.  If the frame where the
+        highlight was displayed was killed, invalidate the highlight
+        info.
+        (IT_update_end): Reset the highlight flag.  Reset the mouse
+        highlight-defer flag.
+        (IT_frame_up_to_date): New function, if mouse highlight was
+        deferred due to GC, do it now.
+        (internal_terminal_init): Initialize mouse-highlight related
+        members of the_only_x_display.  Assign IT_frame_up_to_date to
+        frame_up_to_date_hook.
+        (dos_rawgetc): If the mouse moved, update mouse highlight.  If
+        help_echo changed value, generate a HELP_EVENT event.
+        (syms_of_msdos): Staticpro help_echo and previous_help_echo.
+
         * msdos.h (struct display_info): New.
         (struct x_output): Add the display_info member.
         (FRAME_X_DISPLAY_INFO): New macro.