(pgx, pg): New commands to print a glyph structure.
(pgi, pgn): New commands to print specific/next glyph.
(pgrowx, pgrow): New commands to print all glyphs in a row.
(mac_tsm_resume, mac_tsm_suspend) [USE_MAC_TSM]: New functions.
(mac_handle_window_event, XTread_socket) [USE_MAC_TSM]: Use them.
(Vmac_ts_script_language_on_focus) [USE_MAC_TSM]: New variable.
(syms_of_macterm) [USE_MAC_TSM]: Defvar it.
(saved_ts_language, saved_ts_component) [USE_MAC_TSM]: New variables.
(mac_initialize_display_info) [MAC_OSX]: Use Quartz Display
Services functions to get size of main display in pixels.
iterator stack (instead of hardcoded number). Increase from 2 to 4
to make room for propertized overlay strings before and after a
display string, image or composition.
(struct it): Add image_id and method members to iterator stack.
overlay_string_index after pop_it. Add asserts.
(handle_stop): Look for overlay strings around a display string,
image, or composition. Handle properties on those strings.
(next_overlay_string): Don't set string, pos or method after pop_it.
(get_overlay_strings_1): Split from get_overlay_strings; don't
modify it if no overlay strings are found.
(get_overlay_strings): Use get_overlay_strings_1. Always set
it->string and it->method.
(push_it): Push it->image_id and it->method. Push it->object
instead of it->string if method is GET_FROM_IMAGE.
(pop_it): Pop it->image_id and it->method. Ppo it->object
instead of it->string if method is GET_FROM_IMAGE.
Reset it->current.string_pos if popped it->string is nil.
(reseat_1): Remove comment dated 19 May 2003. It expressed doubt
whether a given change was correct; but the change is correct.
Clear it->string_from_display_prop_p.
(set_iterator_to_next): Rely on it->method and it->image_id from
iterator stack, instead of setting them explicitly after pop_it.
(PERIODIC_PREEMPTION_CHECKING): Define to 1 iff EMACS_HAS_USECS.
(Vredisplay_preemption_period): New variable.
(syms_of_display): DEFVAR_LISP and initialize it.
(preemption_period, preemption_next_check): New variables.
(update_frame, update_single_window): Initialize them based on
Vredisplay_preemption_period if !force_p.
(update_window, update_frame_1): Use them to determine when to
check for input.
it->string if composition is coming from string.
(set_cursor_from_row): Don't return 0 unless row displays a
continued line.
(dump_glyph): Dump composite glyph.
(deleted_pid_list): New variable to store the pids
of deleted processes. Declare it only if SIGCHLD is defined.
(init_process): Initialize it.
(syms_of_process): Staticpro it.
(Fdelete_process): Add pid of the deleted process to it. Check after
the addition and before the kill if the process is already stopped,
in which case it is deleted from the list and not killed.
(sigchld_handler): Define it only if SIGCHLD is. Search the process
that signaled Emacs in `deleted_pid_list' before `Vprocess_alist'.
Original idea by Stefan Monnier.
