* font.c (copy_font_spec): Rename from Fcopy_font_spec, since it
was inaccessible from Lisp.
(merge_font_spec): Likewise, renaming from Fmerge_font_spec.
* font.c, font.h, fontset.c, xfaces.c, xfont.c: Change all uses.
* xterm.h (struct x_display_info): Add atoms and Window for xsettings.
* xterm.c (handle_one_xevent): Call xft_settings_event for
ClientMessage, PropertyNotify and DestroyNotify.
(x_term_init): If we have XFT, get DPI from Xft.dpi.
Call xsettings_initialize.
* xftfont.c (xftfont_fix_match): New function.
(xftfont_open): Call XftDefaultSubstitute before XftFontMatch.
Call xftfont_fix_match after XftFontMatch.
* xfont.c (xfont_driver): Initialize all members.
* xfns.c (x_default_font_parameter): Try font from Ffont_get_system_font.
Do not get font from x_default_parameter if we got one from
Ffont_get_system_font.
(Fx_select_font): Get the defaut font name from :name of FRAME_FONT (f).
* w32font.c (w32font_driver): Initialize all members.
* termhooks.h (enum event_kind): CONFIG_CHANGED_EVENT is new.
* lisp.h: Declare syms_of_xsettings.
* keyboard.c (kbd_buffer_get_event, make_lispy_event): Handle
CONFIG_CHANGED_EVENT.
* ftfont.c (ftfont_filter_properties): New function.
* frame.c (x_set_font): Remove unused variable lval.
* font.h (struct font_driver): filter_properties is new.
* font.c (font_put_extra): Don't return if val is nil, it means
boolean option is off.
(font_parse_fcname): Collect all extra properties in extra_props
and call filter_properties for all drivers with extra_props and
font as parameter.
(font_open_entity): Do not use cache, it does not pick up new fontconfig
settings like hinting.
(font_load_for_lface): If spec had a name in it, store it in entity.
* emacs.c (main): Call syms_of_xsettings
* config.in: HAVE_GCONF is new.
* Makefile.in (GCONF_CFLAGS, GCONF_LIBS): New variables for HAVE_GCONF.
xsettings.o is new.
* menu-bar.el: Put "Use system font" in Option-menu.
* loadup.el: If feature system-font-setting or font-render-setting is
there, load font-setting.
* Makefile.in (ELCFILES): font-settings.el is new.
* font-setting.el: New file.
* NEWS: Mention dynamic font changes (font-use-system-font).
* configure.in: New option: --with(out)-gconf.
Set HAVE_GCONF if we find gconf.
functions.
(xfont_scripts_cache, xfont_scratch_props): New variables.
(Qlatin, Vscalable_fonts_allowed): Extern it.
(xfont_list_pattern): Argument changed. Callers changed. Check
Vscalable_fonts_allowed. Check the support of a script.
(xfont_list): Don't reject a font spec with :script property.
(xfont_has_char): Fix setting of encoding.
(syms_of_xfont): Staticpro and initialize xfont_scripts_cache and
xfont_scratch_props.
(struct xfont_info): New structure.
(xfont_query_font): Deleted.
(xfont_find_ccl_program): Renamed from x_find_ccl_program and
moved from xterm.c.
(xfont_driver): Adjusted for the change of struct font_driver.
(compare_font_names): New function.
(xfont_list_pattern): Sort font names case insensitively. Make
font_entity by calling font_make_entity. Avoid auto-scaled fonts.
(xfont_list): Return a list, not vector.
(xfont_match): If the font doesn't have QCname property, generate
a name from the other font properties.
(xfont_open): Return a font-ojbect. Adjusted for the change of
struct font. Get underline_thickness and underline_position from
font property. Don't update dpyinfo->smallest_font_height and
dpyinfo->smallest_char_width.
(xfont_close): Don't free struct font.
(xfont_prepare_face): Adjusted for the change of struct font.
(xfont_done_face): Deleted.
(xfont_has_char): Adjusted for the change of struct font.
(xfont_encode_char, xfont_draw): Likewise.
(xfont_check): New function.
