parameters instead of using int parameters. Expect FN to accept
EMACS_INT parameters.
(display_echo_area, resize_echo_area_axactly, current_message)
(truncate_echo_area, set_message_1): Call with_echo_area_buffer
with new argument list.
(resize_mini_window_1): New callback function.
(current_message_1, truncate_message_1, set_message_1): Change
parameter lists to the new format expected by
with_echo_area_buffer.
list, take one USER_DATA argument.
(foreach_window_1): Likewise, and call callback functions with two
args, the window and USER_DATA.
(struct check_window_data): New struct.
(check_window_containing): Use it.
(window_from_coordinates): Set up a struct check_window_data for
foreach_window.
(add_window_to_list, freeze_window_start): Change parameters
according to new calling convention.
Record the object that generated the help echo and the position of
that object in help_echo_object and help_echo_pos. Record that
some glyphs in a row are displayed in mouse-face.
(IT_update_begin): Don't clear mouse highlight unless one of the
enabled glyph rows is marked as being displayed in mouse-face.
(dos_rawgetc): Generate 2 events for HELP_EVENT. Pass the object
and position recorded in help_echo_object and help_echo_pos to the
event queue.
(IT_menu_display): Accept a new argument PN: the pane number of
the current menu pane. Record the pane number and the item
number of the item which has associated help string.
(XMenuActivate): Update the prototype for help_callback in
function declaration. Call IT_menu_display with the current menu
pane number as an additional argument. Call help_callback with
two additional arguments: the pane number and the item number of
the menu item associated with the help text.
(help_echo_object, help_echo_pos): New variables.
(syms_of_msdos): Initialize them and staticpro help_echo_object.
(help_echo_window): New variable.
(syms_of_msdos): Initialize and staticpro it.
(IT_note_mode_line_highlight): Set help_echo_window.
(IT_note_mouse_highlight): Ditto.
(dos_rawgetc): Store help_echo_window in the second event produced
for HELP_EVENTs.
(note_mouse_highlight, note_tool_bar_highlight): Set
help_echo_window.
(XTread_socket): Pass help_echo_window to gen_help_event.
(syms_of_xterm): Initialize and staticpro help_echo_window.
