(syms_of_xdisp): DEFVAR it here.
(update_menu_bar): Always return hooks_run.
Set Vmenu_updating_frame.
(redisplay_internal): Test Vinhibit_redisplay
before calculating SELECTED_FRAME.
[!MAC_OSX] (select): Try detect_input_pending before ReceiveNextEvent
in the same BLOCK_INPUT block, in case that some input has already
been read asynchronously. Pretend to be interrupted by a signal
if some input is available.
[MAC_OSX] (select_and_poll_event, sys_select): Likewise.
(SELECT_POLLING_PERIOD_USEC) [SELECT_USE_CFSOCKET]: Change to 100000.
Now used for ReceiveNextEvent timeout instead of select timeout.
(EVENT_CLASS_SOCK) [SELECT_USE_CFSOCKET]: Remove macro.
[SELECT_USE_CFSOCKET] (socket_callback): Add non-blocking connect
support. Quit event loop.
[MAC_OSX] (sys_select) [SELECT_USE_CFSOCKET]: Add non-blocking
connect support. Reuse previously allocated CFRunLoopSource.
(Fmac_process_hi_command) [TARGET_API_MAC_CARBON]: New function.
(syms_of_mac) [TARGET_API_MAC_CARBON]: Defsubr it.
so always calculate heights even when pos-visible-in-window-p is
called with partially = t. Don't overshoot last_visible_y in move_it_to.
Return row height and row number in new rowh and vpos args.
(cursor_row_fully_visible_p): First line is always "fully visible".
(try_window): Don't clear matrix if vscrolled.
Return row height and row number for partially visible rows.
Modify return value to a 2 element list for fully visible rows
and 6 for partially visible row.
(window_scroll_pixel_based): Use pos_visible_p directly instead of
Fpos_visible_in_window_p. Fix auto vscrolling for partially visible lines.
Only vscroll backwards if already vscrolled forwards. Unconditionally
vscroll forwards if PT is first (and only) line. Set new window start
instead of scrolling at start/end of tall line.
(CHARS_MODIFF, BUF_CHARS_MODIFF): New macros.
* buffer.c (Fbuffer_chars_modified_tick): New function returning
value of BUF_CHARS_MODIFF.
(syms_of_buffer): Defsubr it.
(Fget_buffer_create): Initialize BUF_CHARS_MODIFF.
* insdel.c (modify_region): New argument preserve_chars_modiff.
Set CHARS_MODIFF to MODIFF provided preserve_chars_modiff is zero.
(insert_1_both, insert_from_string_1, insert_from_buffer_1)
(adjust_after_replace, adjust_after_replace_noundo)
(replace_range, replace_range_2, del_range_2): Reset CHARS_MODIFF.
* lisp.h (modify_region): Add fourth argument in extern.
* casefiddle.c (casify_region): Call modify_region with fourth
argument zero to assert that CHARS_MODIFF is updated.
* editfns.c (Fsubst_char_in_region, Ftranslate_region_internal)
(Ftranspose_regions): Likewise.
* textprop.c (Fadd_text_properties, Fset_text_properties)
(Fremove_text_properties, Fremove_list_of_text_properties):
Call modify_region with fourth argument 1 to avoid that
CHARS_MODIFF is updated.
