* lisp/dynamic-setting.el (font-setting-change-default-font):
Instead of setting the font frame parameter, just clear the font
and face cache and redraw the display.  This will re-open all
fonts as well.
* src/ftcrfont.c (ftcrfont_get_default_font_options): New
function.
* src/ftfont.h: Export.
* src/xsettings.c (apply_xft_settings): Call that function to
obtain the default font settings on Cairo.  (bug#58912,
bug#59283, bug#59271)

* .gitignore: Add binaries specific to Haiku.

* Makefie.in (HAVE_BE_APP): New variable.
(install-arch-dep): Install Emacs and Emacs.pdmp when
using Haiku.

* configure.ac: Detect and configure for Haiku and
various related configurations.
(be-app, be-freetype, be-cairo): New options.
(HAVE_BE_APP, HAIKU_OBJ, HAIKU_CXX_OBJ)
(HAIKU_LIBS, HAIKU_CFLAGS): New variables.
(HAIKU, HAVE_TINY_SPEED_T): New define.
(emacs_config_features): Add BE_APP.

* doc/emacs/Makefile.in (EMACSSOURCES): Add Haiku
appendix.

* doc/emacs/emacs.texi: Add Haiku appendix to menus and
include it.

* doc/emacs/haiku.texi: New Haiku appendix.

* doc/lispref/display.texi (Defining Faces, Window Systems):
Explain meaning of `haiku' as a window system identifier.
(haiku-use-system-tooltips): Explain meaning of system
tooltips on
Haiku.

* doc/lispref/frames.texi (Multiple Terminals): Explain
meaning of haiku as a display type.
(Frame Layout): Clarify section for Haiku frames.
(Size Parameters): Explain limitations of fullwidth and
fullheight on Haiku.
(Management Parameters): Explain limitations of
inhibiting double buffering on builds with Cairo,
and the inability of frames with no-accept-focus to
receive keyboard input on Haiku.
(Font and Color Parameters): Explain the different font
backends available on Haiku.
(Raising and Lowering): Explain that lowering and
restacking frames doesn't work on Haiku.
(Child Frames): Explain oddities of child frame
visibility on Haiku.

* doc/lispref/os.texi (System Environment): Explain
meaning of haiku.
* etc/MACHINES: Add appropriate notices for Haiku.
* etc/NEWS: Document changes.
* etc/PROBLEMS: Document font spacing bug on Haiku.

* lib-src/Makefile.in: Build be-resources binary on
Haiku.
(CXX, CXXFLAGS, NON_CXX_FLAGS, ALL_CXXFLAGS)
(HAVE_BE_APP, HAIKU_LIBS, HAIKU_CFLAGS): New variables.
(DONT_INSTALL): Add be-resources binary if on Haiku.
(be-resources): New target.

* lib-src/be_resources: Add helper binary for setting
resources on the Emacs application.

* lib-src/emacsclient.c (decode_options): Set
alt_display to "be" on Haiku.

* lisp/cus-edit.el (custom-button, custom-button-mouse)
(custom-button-unraised, custom-button-pressed): Update
face definitions for Haiku.

* lisp/cus-start.el: Add haiku-debug-on-fatal-error and
haiku-use-system-tooltips.

* lisp/faces.el (face-valid-attribute-values): Clarify
attribute comment for Haiku.
(tool-bar): Add appropriate toolbar color for Haiku.

* lisp/frame.el (haiku-frame-geometry)
(haiku-mouse-absolute-pixel-position)
(haiku-set-mouse-absolute-pixel-position)
(haiku-frame-edges)
(haiku-frame-list-z-order): New function declarations.

(frame-geometry, frame-edges)
(mouse-absolute-pixel-position)
(set-mouse-absolute-pixel-position)
(frame-list-z-order): Call appropriate window system
functions on Haiku.

(display-mouse-p, display-graphic-p)
(display-images-p, display-pixel-height)
(display-pixel-width, display-mm-height)
(display-mm-width, display-backing-store)
(display-save-under, display-planes)
(display-color-cells, display-visual-class): Update type
tests for Haiku.

* lisp/international/mule-cmds.el
(set-coding-system-map): Also
prevent set-terminal-coding-system from appearing in the menu
bar on Haiku.

* lisp/loadup.el: Load Haiku-specific files when built
with Haiku, and don't rename newly built Emacs on Haiku as BFS
doesn't support hard links.

* lisp/menu-bar.el (menu-bar-open): Add for Haiku.

* lisp/mwheel.el (mouse-wheel-down-event): Expect
wheel-up on Haiku.
(mouse-wheel-up-event): Expect wheel-down on Haiku.
(mouse-wheel-left-event): Expect wheel-left on Haiku.
(mouse-wheel-right-event): Expect wheel-right on Haiku.

* lisp/net/browse-url.el
(browse-url--browser-defcustom-type):
Add option for WebPositive.
(browse-url-webpositive-program): New variable.
(browse-url-default-program): Search for WebPositive.
(browse-url-webpositive): New function.

* lisp/net/eww.el (eww-form-submit, eww-form-file)
(eww-form-checkbox, eww-form-select): Define faces
appropriately for Haiku.

* lisp/term/haiku-win.el: New file.

* lisp/tooltip.el (menu-or-popup-active-p): New function
declaration.
(tooltip-show-help): Don't use tooltips on Haiku when a
menu is active.

* lisp/version.el (haiku-get-version-string): New
function declaration.
(emacs-version): Add Haiku version string if
appropriate.

* src/Makefile.in: Also produce binary named "Emacs"
with Haiku resources set.

(CXX, HAIKU_OBJ, HAIKU_CXX_OBJ, HAIKU_LIBS)
(HAIKU_CFLAGS, HAVE_BE_APP, NON_CXX_FLAGS)
(ALL_CXX_FLAGS): New variables.

(.SUFFIXES): Add .cc.
(.cc.o): New target.
(base_obj): Add Haiku C objects.
(doc_obj, obj): Split objects that should scanned for
documentation into doc_obj.
(SOME_MACHINE_OBJECTS): Add appropriate Haiku C objects.
(all): Depend on Emacs and Emacs.pdmp on Haiku.
(LIBES): Add Haiku libraries.
(gl-stamp)
($(etc)/DOC): Scan doc_obj instead of obj
(temacs$(EXEEXT): Use C++ linker on Haiku.
(ctagsfiles3): New variable.
(TAGS): Scan C++ files.

* src/alloc.c (garbage_collect): Mark Haiku display.

* src/dispextern.h (HAVE_NATIVE_TRANSFORMS): Also enable
on Haiku.
(struct image): Add fields for Haiku transforms.
(RGB_PIXEL_COLOR): Define to unsigned long on Haiku as
well.
(sit_for): Also check USABLE_SIGPOLL.
(init_display_interactive): Set initial window system to
Haiku on Haiku builds.

* src/emacs.c (main): Define Haiku syms and init haiku
clipboard.
(shut_down_emacs): Quit BApplication on Haiku and
trigger debug
on aborts if haiku_debug_on_fatal_error.
(Vsystem_type): Update docstring.

* src/fileio.c (next-read-file-uses-dialog-p): Enable on
Haiku.

* src/filelock.c (WTMP_FILE): Only define if BOOT_TIME
is also defined.

* src/floatfns.c (double_integer_scale): Work around
Haiku libroot brain damage.

* src/font.c (syms_of_font): Define appropriate font
driver symbols for Haiku builds with various options.

* src/font.h: Also enable ftcrfont on Haiku builds with
Cairo.
(font_data_structures_may_be_ill_formed): Also enable on
Haiku builds that have Cairo.

* src/frame.c (Fframep): Update doc-string for Haiku
builds and return haiku if appropriate.
(syms_of_frame): New symbol `haiku'.

* src/frame.h (struct frame): Add output data for Haiku.
(FRAME_HAIKU_P): New macro.
(FRAME_WINDOW_P): Test for Haiku frames as well.

* src/ftcrfont.c (RED_FROM_ULONG, GREEN_FROM_ULONG)
(BLUE_FROM_ULONG): New macros.
(ftcrfont_draw): Add haiku specific code for Haiku
builds with Cairo.

* src/ftfont.c (ftfont_open): Set face.
(ftfont_has_char, ftfont_text_extents): Work around
crash.
(syms_of_ftfont): New symbol `mono'.

* src/ftfont.h (struct font_info): Enable Cairo-specific
fields for Cairo builds on Haiku.

* src/haiku_draw_support.cc:
* src/haiku_font_support.cc:
* src/haiku_io.c:
* src/haiku_select.cc:
* src/haiku_support.cc:
* src/haiku_support.h:
* src/haikufns.c:
* src/haikufont.c:
* src/haikugui.h:
* src/haikuimage.c:
* src/haikumenu.c:
* src/haikuselect.c:
* src/haikuselect.h:
* src/haikuterm.c:
* src/haikuterm.h: Add new files for Haiku windowing
support.

* src/haiku.c: Add new files for Haiku operating system
support.

* src/image.c: Implement image transforms and native XPM
support
on Haiku.

(GET_PIXEL, PUT_PIXEL, NO_PIXMAP)
(PIX_MASK_RETAIN, PIX_MASK_DRAW)
(RGB_TO_ULONG, RED_FROM_ULONG, GREEN_FROM_ULONG)
(BLUE_FROM_ULONG, RED16_FROM_ULONG, GREEN16_FROM_ULONG)
(BLUE16_FROM_ULONG): Define to appropriate values on
Haiku.

(image_create_bitmap_from_data): Add Haiku support.
(image_create_bitmap_from_file): Add TODO on Haiku.
(free_bitmap_record): Free bitmap on Haiku.
(image_size_in_bytes): Implement for Haiku bitmaps.
(image_set_transform): Implement on Haiku.
(image_create_x_image_and_pixmap_1): Implement on Haiku,
24-bit or 1-bit only.
(image_destroy_x_image, image_get_x_image): Use correct
img and pixmap values on Haiku.
(lookup_rgb_color): Use correct macro on Haiku.
(image_to_emacs_colors): Implement on Haiku.
(image_disable_image): Disable on Haiku.
(image_can_use_native_api): Test for translator presence
on Haiku.
(native_image_load): Use translator on Haiku.
(imagemagick_load_image): Add Haiku-specific quirks.
(Fimage_transforms_p): Allow rotate90 on Haiku.
(image_types): Enable native XPM support on Haiku.
(syms_of_image): Enable XPM images on Haiku.

* src/keyboard.c (kbd_buffer_get_event)
(handle_async_input, handle_input_available_signal)
(handle_user_signal, Fset_input_interrupt_mode)
(init_keyboard): Check for USABLE_SIGPOLL along with
USABLE_SIGIO.

* src/lisp.h (pD): Work around broken Haiku headers.
(HAVE_EXT_MENU_BAR): Define on Haiku.
(handle_input_available_signal): Enable if we just have
SIGPOLL as well.

* src/menu.c (have_boxes): Return true on Haiku.
(single_menu_item): Enable toolkit menus on Haiku.
(find_and_call_menu_selection): Also enable on Haiku.

* src/process.c (keyboard_bit_set): Enable with only
usable SIGPOLL.
(wait_reading_process_output): Test for SIGPOLL as well
as SIGIO availability.

* src/sound.c (sound_perror, vox_open)
(vox_configure, vox_close): Enable for usable SIGPOLL as
well.

* src/sysdep.c (sys_subshell): Enable for usable SIGPOLL.
(reset_sigio): Make conditional on F_SETOWN.
(request_sigio, unrequest_sigio)
(emacs_sigaction_init): Also handle SIGPOLLs.
(init_sys_modes): Disable TCXONC usage on Haiku, as it
doesn't have any ttys other than pseudo ttys, which don't
support C-s/C-q flow control, and causes compiler warnings.
(speeds): Disable high speeds if HAVE_TINY_SPEED_T.

* src/termhooks.h (enum output_method): Add output_haiku.
(struct terminal): Add Haiku display info.
(TERMINAL_FONT_CACHE): Enable for Haiku.

* src/terminal.c (Fterminal_live_p): Return `haiku' if
appropriate.
* src/verbose.mk.in (AM_V_CXX, AM_V_CXXLD): New logging
variables.

* src/xdisp.c (redisplay_internal)
(note_mouse_highlight): Return on Haiku if a popup is activated.
(display_menu_bar): Return on Haiku if frame is a Haiku
frame.

* src/xfaces.c (GCGraphicsExposures): Enable correctly on Haiku.
(x_create_gc): Enable dummy GC code on Haiku.

* src/xfns.c (x-server-version, x-file-dialog): Add
Haiku specifics to doc strings.

* src/xterm.c (syms_of_xterm): Add Haiku information to
doc string.

* src/xsettings.h:

* src/xsettings.c:
(dpyinfo_valid, store_tool_bar_style_changed)
(XSETTINGS_FONT_NAME, get_prop_window, read_settings)
(apply_xft_settings, read_and_apply_settings)
(xft_settings_event, init_xsettings, xsettings_initialize):

* src/xfaces.c:
(x_create_gc, x_free_gc):

* src/xdisp.c (redisplay_tool_bar, redisplay_internal)
(draw_glyphs_debug, draw_glyphs, mouse_face_from_buffer_pos)
(note_mouse_highlight):

* src/terminal.c (Fterminal_live_p):

* src/termhooks.h (enum output_method, GCALIGNED_STRUCT)
(TERMINAL_FONT_CACHE):

* src/process.c (wait_reading_process_output):

* src/pgtkterm.h:

* src/pgtkterm.c:

* src/pgtkselect.h:

* src/pgtkselect.c:

* src/pgtkgui.h:

* src/pgtkfns.c:

* src/image.c:
(XGetPixel, XPutPixel, image_create_bitmap_from_data)
(image_create_bitmap_from_file, free_bitmap_record)
(image_destroy_x_image, gui_put_x_image, image_get_x_image)
(Create_Pixmap_From_Bitmap_Data, xbm_load_image, )
(xpm_load_image, lookup_rgb_color, image_disable_image)
(image_build_heuristic_mask, imagemagick_load_image):

* src/gtkutil.h:

* src/gtkutil.c (PGTK_TRACE, xg_set_screen, xg_display_open)
(xg_display_close, xg_create_default_cursor)
(xg_get_pixbuf_from_pix_and_mask, xg_check_special_colors)
(qttip_cb, hierarchy_ch_cb, xg_prepare_tooltip, )
(xg_show_tooltip, xg_hide_tooltip, xg_frame_resized)
(xg_frame_set_char_size, xg_height_or_width_changed)
(xg_set_widget_bg, style_changed_cb, xg_create_frame_widgets)
(xg_free_frame_widgets, x_wm_set_size_hint, xg_frame_restack)
(xg_mark_data, xg_update_frame_menubar, free_frame_menubar)
(xg_update_submenu, xg_finish_scroll_bar_creation)
(xg_update_scrollbar_pos, xg_update_horizontal_scrollbar_pos)
(xg_set_toolkit_scroll_bar_thumb, xg_event_is_for_scrollbar)
(draw_page, xg_pack_tool_bar, xg_create_tool_bar)
(xg_update_tool_bar_sizes, update_frame_tool_bar)
(free_frame_tool_bar, xg_change_toolbar_position):

* src/ftcrfont.c:
(ftcrfont_draw):

* src/fringe.c:
(init_fringe_bitmap):

* src/frame.h (GCALIGNED_STRUCT, FRAME_WINDOW_P):

* src/frame.c (Fframep):

* src/font.h:

* src/font.c (syms_of_font):

* src/emacsgtkfixed.c:
(emacs_fixed_get_preferred_width)
(emacs_fixed_get_preferred_height, XSetWMSizeHints):

* src/emacs.c (main):

* src/dispnew.c (init_display_interactive):

* src/dispextern.h:

* src/alloc.c:
(garbage_collect):

* src/Makefile.in (PGTK_OBJ, PGTK_LIBS, base_obj, LIBES):

* src/.gdbinit:

* lisp/url/url-privacy.el (url-setup-privacy-info):

* lisp/term/pgtk-win.el (featurep):

* lisp/startup.el (command-line, fancy-splash-frame):

* lisp/net/eww.el (eww-form-submit, eww-form-file)
(eww-form-checkbox, eww-form-select):

* lisp/mwheel.el (mouse-wheel-down-event, mouse-wheel-up-event):

* lisp/loadup.el (featurep):

* lisp/international/mule-cmds.el (set-coding-system-map):

* lisp/frame.el (pgtk-frame-geometry, frame-geometry)
(w32-frame-edges, frame-edges)
(pgtk-mouse-absolute-pixel-position)
(mouse-absolute-pixel-position)
(pgtk-set-mouse-absolute-pixel-position)
(pgtk-frame-list-z-order, frame-list-z-order)
(pgtk-frame-restack, frame-restack, display-mouse-p)
(display-graphic-p, display-symbol-keys-p, )
(display-pixel-height, display-mm-height, display-mm-width)
(display-backing-store, display-save-under, display-color-cells)
(display-planes, display-visual-class)
(pgtk-display-monitor-attributes-list)
(display-monitor-attributes-list):

* lisp/faces.el (face-spec-set-match-display, tool-bar):

* lisp/cus-edit.el (custom-button, custom-button-mouse)
(custom-button-pressed, custom-display):

* configure.ac (AUTO_DEPEND, XARGS_LIMIT, XWIDGETS_OBJ):

Most of these functions can be static.  A few are unused.
* src/coding.c (encode_string_utf_8, decode_string_utf_8):
Define only if ENABLE_UTF_8_CONVERTER_TEST, as they're
not needed otherwise.
* src/coding.c (encode_string_utf_8, decode_string_utf_8):
* src/data.c (integer_mod):
* src/fns.c (base64_encode_region_1, base64_encode_string_1):
* src/ftfont.c (ftfont_get_fc_charset):
Now static.
* src/sysdep.c (verrprintf): Remove; unused.

* src/ftfont.h (ftfont_open2): Remove extern.
(ftfont_fix_match, ftfont_add_rendering_parameters)
(ftfont_entity_pattern): Add externs.
(struct font_info): Remove member bitmap_strike_index.
(struct font_info) [USE_CAIRO]: Remove member ft_size_draw.  All uses removed.
Add member bitmap_position_unit.

* src/xftfont.c (xftfont_fix_match, xftfont_add_rendering_parameters): Move
functions from here ...
* src/ftfont.c (ftfont_fix_match, ftfont_add_rendering_parameters): ... to
here.  All uses changed.
* src/xftfont.c (xftfont_open): Extract FcPattern creation from font entity
from here ...
* src/ftfont.c (ftfont_entity_pattern):	... to here.
* src/xftfont.c (syms_of_xftfont): Move DEFSYMs for Fontconfig's rendering
parameters from here ...
* src/ftfont.c (syms_of_ftfont): ... to here.

* src/ftfont.c (ftfont_open, ftfont_open2): Undo introduction of
bitmap_strike_index.  Merge functions into ftfont_open.

* src/ftcrfont.c (ftcrfont_open): Align code with xftfont_open rather than
ftfont_open.
(ftcrfont_close): Likewise.
(ftcrfont_has_char, ftcrfont_encode_char):
(ftcrfont_otf_capability) [HAVE_LIBOTF]:
(ftcrfont_variation_glyphs) [HAVE_OTF_GET_VARIATION_GLYPHS]: New functions.
(ftcrfont_driver): Register them.
(ftcrfont_get_bitmap, ftcrfont_anchor_point):
(ftcrfont_shape) [HAVE_M17N_FLT && HAVE_LIBOTF]: Use bitmap_position_unit
instead of bitmap_strike_index to screen bitmap fonts.
(ftcrfont_get_bitmap, ftcrfont_anchor_point):
(ftcrfont_otf_capability) [HAVE_LIBOTF]:
(ftcrfont_shape) [HAVE_M17N_FLT && HAVE_LIBOTF]:
(ftcrfont_variation_glyphs) [HAVE_OTF_GET_VARIATION_GLYPHS]: Temporarily
assign ftcrfont_info->ft_size and call corresponding ftfont functions.
(ftcrfont_draw): Don't flush cairo surface when exporting.

* src/ftfont.h (struct font_info): New member bitmap_strike_index.
* src/ftfont.c (ftfont_open2): Try bitmap strikes as fallbacks.
(ftfont_open): Discard bitmap strikes.
* src/ftcrfont.c (ftcrfont_open): Recalculate metrics for bitmap strikes.
(ftcrfont_get_bitmap, ftcrfont_anchor_point, ftcrfont_shape): New functions.
(struct font_driver): Use them.

* src/ftfont.h (struct font_info): Replace member cr_font_face of type
cairo_font_face_t * with cr_scaled_font of type cairo_scaled_font_t *.
* src/ftcrfont.c: Include math.h for floor, ceiling, and lround.
(ftcrfont_glyph_extents): Use cairo_scaled_font_glyph_extents.
(ftcrfont_open): Create cairo_scaled_font_t object and set it to
cr_scaled_font member of struct font_info.
(ftcrfont_close): Use cairo_scaled_font_destroy.
(ftcrfont_draw): Use cairo_set_scaled_font.