(custom-buffer-create-internal): Reword the top-of-buffer help intro.
Don't include buttons that write a file when there's no file.
(custom-variable-menu, custom-face-menu, custom-group-menu):
Don't include commands that write a file when there's no file.
is non-nil since it may be t without having turned on font-lock-mode-internal.
(font-lock-choose-keywords): Minor optimization.
(font-lock-add-keywords, font-lock-remove-keywords, font-lock-set-defaults):
Don't call make-local-variable on a variable that we know to already be local.
(x_per_char_metric) [USE_CG_TEXT_DRAWING]: Remove prototype.
(mac_query_char_extents): New function.
(x_per_char_metric): Use it.
(XLoadQueryFont): Likewise. Consolidate min/max_bounds calculations.
[USE_CG_TEXT_DRAWING] (mac_draw_string_cg): Use
mac_per_char_metric instead of x_per_char_metric.
(mac_text_extents_16): New function.
(mac_compute_glyph_string_overhangs): Use it.
(mac_unload_font): Free member `bounds' in struct MacFontStruct.
(STORE_XCHARSTRUCT): Don't set member `valid_p'.
(XCharStructRow): New typedef.
(XCHARSTRUCTROW_CHAR_VALID_P, XCHARSTRUCTROW_SET_CHAR_VALID): New
macros.
(struct MacFontStruct): Add member `bounds'. Remove member
`per_char'. All uses for QuichDraw Text fonts are changed to
`bounds.per_char'. ATSUI font bounds are represented as an array
`bounds.rows' of XCharStructRow's, each of which consists of a
bitmap of valid entries and an array of char bounds.
(set_frame_menubar, mac_menu_show keymp_panes)
(single_keymap_panes, list_of_panes, list_of_item)
(single_menu_item): Add argument types to prototypes.
(mac_dialog_show) [HAVE_DIALOGS]: Likewise.
(struct skp): New struct (from xmenu.c).
(single_keymap_panes, single_menu_item, list_of_panes)
(list_of_item): Sync with xmenu.c.
(Fx_popup_menu, Fx_popup_dialog): Likewise. Don't get window from
POSITION if it is mac-apple-event event.
(menubar_selection_callback): Don't use menu_command_in_progress.
(set_frame_menubar): First parse all submenus, then make
widget_value trees from them. Don't allocate any widget_value
objects until we are done with the parsing.
(parse_single_submenu, digest_single_submenu): New functions.
(single_submenu): Function deleted, replaced by those two.
(install_menu_quit_handler) [HAVE_CANCELMENUTRACKING]: Don't
create or dispose of EventHandlerUPP. Install hander to all submenus.
(mac_menu_show) [!HAVE_MULTILINGUAL_MENU]: Use ENCODE_MENU_STRING
instead of ENCODE_SYSTEM.
(free_frame_menubar, fill_submenu, fill_menu): Don't use NULL for
integer values.
[HAVE_DIALOGS] (mac_dialog_show): Sync with xdialog_show (in xmenu.c).
(add_menu_item) [TARGET_API_MAC_CARBON]: Use CFString functions to
format menu item string. Don't use NULL for integer value.
confusing. If the :help-echo keyword is a function, it is not
directly used as the :help-echo overlay property, as the xref seems to
suggest (it does not take the appropriate args).
