GitLab

 dispextern.h (struct bidi_saved_info): Use EMACS_INT for buffer positions.

 xdisp.c (Fcurrent_bidi_paragraph_direction): Call
 bidi_paragraph_init with NO_DEFAULT_P non-zero.
 bidi.c (bidi_paragraph_init): Accept an additional argument
 NO_DEFAULT_P; all callers changed.  If NO_DEFAULT_P is non-zero,
 search back until a paragraph with a strong directional character
 is found, and use that to determine paragraph's base direction.
 dispextern.h (bidi_paragraph_init): Update prototype.

Reduce the number of warnings with -Wwrite-strings.
* src/xrdb.c (get_environ_db, get_system_name):
* src/unexelf.c (find_section):
* src/term.c (string_cost, string_cost_one_line, per_line_cost)
(get_named_tty, init_tty):
* src/sysdep.c (sys_subshell):
* src/sound.c (sound_perror, sound_warning, vox_open, vox_init)
(alsa_sound_perror, alsa_open, alsa_configure, alsa_init):
* src/search.c (Freplace_match):
* src/process.c (Fmake_network_process, send_process, init_process):
* src/lread.c (Fload, init_lread):
* src/keymap.c (Fdescribe_buffer_bindings, describe_map_tree):
* src/keyboard.c (parse_tool_bar_item, struct event_head):
* src/gtkutil.h (xg_get_font_name):
* src/gtkutil.c (get_dialog_title, create_dialog, xg_get_font_name)
(make_widget_for_menu_item, make_menu_item, create_menus)
(xg_make_tool_item):
* src/font.c (parse_matrix, font_parse_name):
* src/floatfns.c (rounding_driver, float_error_fn_name):
* src/filelock.c (get_boot_time_1, lock_file_1):
* src/fileio.c (barf_or_query_if_file_exists, check_writable):
* src/editfns.c (get_system_name, get_operating_system_release)
(Fencode_time, Fset_time_zone_rule):
* src/dispextern.h (string_cost, per_line_cost, get_named_tty, init_tty):
* src/buffer.c (defvar_per_buffer): Use const.

* src/xterm.c (x_create_toolkit_scroll_bar):
* src/xfont.c (xfont_list_pattern):
* src/xfns.c (x_default_scroll_bar_color_parameter)
(xic_create_fontsetname, x_default_font_parameter)
(x_screen_planes):
* src/xdisp.c (c_string_pos, number_of_chars, reseat_to_string)
(store_mode_line_string, decode_mode_spec, display_string):
* src/menu.c (digest_single_submenu):
* src/keymap.h (initial_define_key, initial_define_lispy_key):
* src/keymap.c (initial_define_key, initial_define_lispy_key):
* src/image.c (image_error, image_keyword):
* src/gtkutil.h (xg_create_widget, xg_create_scroll_bar):
* src/gtkutil.c (xg_create_widget, xg_create_scroll_bar):
* src/ftfont.c (struct fc_charset_table, ftfont_spec_pattern)
(ftfont_list, ftfont_match):
* src/frame.c (frame_parm_table):
* src/font.h (font_intern_prop, font_parse_xlfd, font_parse_fcname)
(font_unparse_fcname, font_unparse_fcname, font_open_by_name)
(font_add_log, font_deferred_log):
* src/font.c (font_intern_prop, font_parse_xlfd, font_parse_fcname)
(font_unparse_fcname, font_unparse_fcname, font_open_by_name)
(font_add_log, font_deferred_log):
* src/emacs.c (argmatch):
* src/dispextern.h (struct it):
* src/coding.c (ENCODE_DESIGNATION):
* src/charset.c (define_charset_internal): Use const.

* lib-src/ebrowse.c (usage, version, mark_virtual)
* src/alloc.c (lisp_malloc)
* src/buffer.c (set_buffer_internal, set_buffer_internal_1)
* src/charset.h (emacs_mule_charset)
* src/dispextern.h (inhibit_free_realized_faces, redraw_frame)
  (redraw_garbaged_frames, scroll_cost, update_frame, scrolling)
  (bitch_at_user)
* src/lisp.h (Fcheck_coding_system, Fget_text_property)
  (Qfunction, Qcompletion_ignore_case, QCwidth, QCsize)

* src/keyboard.h (xmalloc_widget_value, digest_single_submenu): Remove
declarations, menu.h has them.
(QCbutton, QCtoggle, QCradio, QClabel, extra_keyboard_modifiers)
(Vinput_method_function, Qinput_method_function)
(Qevent_symbol_element_mask, last_event_timestamp):
* src/dispextern.h (Voverflow_newline_into_fringe):
* src/font.h (QCantialias, Qp, syms_of_ftfont, syms_of_xfns)
(syms_of_ftxfont, syms_of_xftfont, syms_of_bdffont)
(syms_of_w32font, syms_of_nsfont):
* src/fontset.h (find_font_encoding, Qlatin):
* src/frame.h (Qtooltip, Qrun_hook_with_args, Vmenu_bar_mode)
(Vtool_bar_mode, set_frame_menubar):
* src/ftfont.h (ftfont_font_format, ftfont_get_fc_charset):
* src/xterm.h (Qx_gtk_map_stock):
* src/keymap.h (meta_prefix_char): Add declarations.

* src/lisp.h: Remove HAVE_SHM code, unused.
(QCmap, QCrehash_size, QCrehash_threshold, QCsize, QCtest)
(QCweakness, Qabove_handle, Qbackquote, Qbar, Qbelow_handle)
(Qborder, Qbottom, Qbox, Qcircular_list, Qcomma, Qcomma_at)
(Qcomma_dot, Qcursor, Qdefault, Qdown, Qend_scroll, Qeq, Qeql)
(Qequal, Qfile_exists_p, Qfont_param, Qfringe, Qfunction)
(Qfunction_documentation, Qhandle, Qhbar, Qheader_line, Qhollow)
(Qidentity, Qleft_margin, Qmenu, Qmenu_bar_update_hook)
(Qmode_line_inactive, Qmouse, Qoverriding_local_map)
(Qoverriding_terminal_local_map, Qratio, Qregion, Qright_margin)
(Qscroll_bar, Qtool_bar, Qtop, Qup, Qvertical_border, Qwhen)
(Qwindow_scroll_functions, Vafter_load_alist)
(Vauto_save_list_file_name, Vface_alternative_font_family_alist)
(Vface_alternative_font_registry_alist, Vface_font_rescale_alist)
(Vface_ignored_fonts, Vinhibit_redisplay, Vminibuffer_list)
(Vprint_length, Vprint_level, Vscalable_fonts_allowed)
(Vshell_file_name, Vsystem_name, Vwindow_scroll_functions)
(Vwindow_system_version, Vx_no_window_manager, initial_argc)
(initial_argv, last_nonmenu_event, load_in_progress)
(noninteractive_need_newline, scroll_margin): Add declarations.

* src/buffer.c (Fset_buffer_multibyte): Remove local extern declaration.

* src/character.c (strwidth, parse_str_to_multibyte): Add const.

* src/character.h (strwidth, parse_str_to_multibyte): Likewise.

* src/charset.c (add_to_log): Remove declaration.

* src/composite.c (syms_of_composite): Remove local extern declarations.

* src/data.c (Finteractive_form): Use const.

* src/dired.c (scmp): Add const.
(directory_files_internal): Remove local extern declaration.

* src/dispextern.h (add_to_log): Remove declaration.
(x_get_arg, x_frame_get_arg, x_frame_get_and_record_arg)
(x_frame_get_and_record_arg, x_default_parameter): Add const.

* src/dispnew.c: Remove duplicate #include <unistd.h>.
(update_window, update_frame_1, init_display): Remove local extern
declarations.

* src/editfns.c (region_limit, syms_of_editfns): Remove local extern
declarations.

* src/emacs.c (main): Remove local extern declaration.

* src/font.c (Qnormal, QCtype, QCfamily, QCweight, QCslant, QCwidth)
(QCheight, QCsize, QCname): Remove declarations.

* src/frame.c (x_get_resource_string, x_get_string_resource)
(x_get_arg, x_frame_get_arg, x_frame_get_and_record_arg)
(x_default_parameter): Use const.

* src/image.c (QCwidth, QCheight, QCforeground, QCbackground, QCfile)
(QCdata, QCtype, Qcenter): Remove declarations.

* src/keyboard.h (do_mouse_tracking): Add declaration.

* src/minibuf.c (Qmouse_face): Remove declaration.

* src/msdos.c (IT_note_mouse_highlight): Remove local extern declaration.

* src/xdisp.c (do_mouse_tracking): Remove declaration.
(add_to_log): Use const.

* src/xfaces.c (Qmouse_face): Remove declaration.
(face_color_gray_p, tty_defined_color, defined_color)
(face_color_gray_p, face_color_supported_p). Add const.

* src/xfns.c: Include xlwmenu.h when USE_LUCID.
(x_defined_color, xic_set_xfontset): Use const.
(Fx_hide_tip): Remove local extern declaration.

* src/xselect.c (selection_data_to_lisp_data)
(x_property_data_to_lisp):
* src/xrdb.c (x_get_string_resource, file_p)
(x_get_customization_string, magic_file_p, search_magic_path)
(get_system_app, get_user_app, x_load_resources, x_get_resource)
(x_get_string_resource): Use const.

* src/xterm.c (xlwmenu_window_p, xlwmenu_redisplay): Remove declarations.
(x_text_icon, x_check_errors, x_connection_closed): Use const.

* src/xterm.h (x_get_customization_string, x_load_resources)
(x_get_resource, x_text_icon, x_text_icon, x_check_errors)
(x_check_errors, x_property_data_to_lisp, defined_color)
(xic_set_xfontset, x_defined_color): Use const.

* dispextern.h (FRINGE_HEIGHT_BITS): New define.
(struct glyph_row): New members left_fringe_offset and
right_fringe_offset.

* xterm.c (x_draw_fringe_bitmap): Don't clip bottom aligned bitmap
specially.
* w32term.c (w32_draw_fringe_bitmap): Likewise.
* nsterm.m (ns_draw_fringe_bitmap): Likewise.

* fringe.c (draw_fringe_bitmap_1): Don't clip bitmap here.
Take account of	bitmap offset.
(draw_window_fringes): Take account of window vscroll.
(update_window_fringes): Likewise.  Extend top-aligned top indicator
or bottom-aligned bottom indicator to adjacent rows if it doesn't fit
in one row.  Don't set redraw_fringe_bitmaps_p outside row comparison.
Set left_fringe_offset and right_fringe_offset (Bug#5634, Bug#6325).

* lwlib/lwlib-Xaw.h: Remove P_ and __P macros.
* lwlib/lwlib-Xlw.h:
* lwlib/lwlib-Xm.h:
* lwlib/lwlib-int.h:
* lwlib/lwlib-utils.h:
* lwlib/lwlib.h: Likewise.

* src/buffer.h: Remove P_ and __P macros.
* src/category.h:
* src/ccl.h:
* src/character.h:
* src/charset.h:
* src/cm.h:
* src/coding.h:
* src/composite.h:
* src/dispextern.h:
* src/disptab.h:
* src/font.h:
* src/fontset.h:
* src/frame.h:
* src/gtkutil.h:
* src/indent.h:
* src/intervals.h:
* src/keyboard.h:
* src/keymap.h:
* src/lisp.h:
* src/macros.h:
* src/md5.h:
* src/menu.h:
* src/msdos.h:
* src/nsterm.h:
* src/puresize.h:
* src/region-cache.h:
* src/syntax.h:
* src/syssignal.h:
* src/systime.h:
* src/termhooks.h:
* src/w32term.h:
* src/widget.h:
* src/window.h:
* src/xgselect.h:
* src/xsettings.h:
* src/xterm.h: Likewise.

 dispextern.h (struct glyph_row): New members minpos and maxpos.
 (MATRIX_ROW_START_CHARPOS, MATRIX_ROW_START_BYTEPOS)
 (MATRIX_ROW_END_CHARPOS, MATRIX_ROW_END_BYTEPOS): Reference minpos
 and maxpos members instead of start.pos and end.pos, respectively.
 xdisp.c (display_line): Compare IT_CHARPOS with the position in
 row->start.pos, rather than with MATRIX_ROW_START_CHARPOS.
 (cursor_row_p): Use row->end.pos rather than MATRIX_ROW_END_CHARPOS.
 (try_window_reusing_current_matrix, try_window_id): Use
 ROW->minpos rather than ROW->start.pos.
 (init_from_display_pos, init_iterator): Use EMACS_INT for
 character and byte positions.
 (find_row_edges): Renamed from find_row_end.  Accept additional
 arguments for minimum and maximum buffer positions seen by
 display_line for this row.  Don't use iterator to find the
 position following the maximum one; instead, increment the
 position found by display_line directly.
 (display_line): Record minimum and maximum buffer positions for
 glyphs in this row.  Record the position of the newline that
 terminates the line.
 dispnew.c (increment_row_positions, check_matrix_invariants):
 Increment and check row->start.pos and row->end.pos, in addition
 to MATRIX_ROW_START_CHARPOS and MATRIX_ROW_END_CHARPOS.

 bidi.c (bidi_move_to_visually_next): Renamed from
 bidi_get_next_char_visually.  All callers changed.

* xsettings.c: Qmonospace_font_name, Qtool_bar_style and
current_tool_bar_style are new.
(store_config_changed_event): Rename from store_font_changed_event.
(XSETTINGS_TOOL_BAR_STYLE): New define.
(SEEN_FONT, SEEN_TB_STYLE): New enum values.
(struct xsettings): Add font and tb_style, set xft stuff inside #ifdef
HAVE_XFT.
(something_changedCB): store_font_changed_event is now
store_config_changed_event
(parse_settings): Rename from parse_xft_settings.  Read
non-xft xsettings outside #ifdef HAVE_XFT.
(read_settings): Renamed from read_xft_settings.
(apply_xft_settings): Take current settings as parameter.  Do not
call read_(xft)_settings.
(read_and_apply_settings): New function.
(xft_settings_event): Do non-xft stuff out of HAVE_XFT.  Call
read_and_apply_settings if there are settings to be read.
(init_xsettings): Renamed from init_xfd_settings.
Call read_and_apply_settings unconditionally.
(xsettings_initialize): Call init_xsettings.
(Ftool_bar_get_system_style): New function.
(syms_of_xsettings): Define Qmonospace_font_name and
Qtool_bar_style.  Initialize current_tool_bar_style to nil.
defsubr Stool_bar_get_system_style. Fprovide on
dynamic-setting.

* xsettings.h (Ftool_bar_get_system_style): Declare.

* xdisp.c: Vtool_bar_style, tool_bar_max_label_size,
Qtext, Qboth, Qboth_horiz are new.
(syms_of_xdisp): Intern Qtext, Qboth, Qboth_horiz, DEFVAR
Vtool_bar_style, tool_bar_max_label_size.

* lisp.h: Extern declare Qtext, Qboth, Qboth_horiz.

* keyboard.c: QClabel is new.
(parse_tool_bar_item): Take out QClabel from tool bar items.
Try to construct a label if ther is no QClabel.
(syms_of_keyboard): Intern :label as QClabel.

* dispextern.h (tool_bar_item_idx): TOOL_BAR_ITEM_LABEL is new.
(Vtool_bar_style, tool_bar_max_label_size, DEFAULT_TOOL_BAR_LABEL_SIZE):
New.

* Makefile.in (SOME_MACHINE_LISP): font-setting.el renamed to
dynamic-setting.el.

* gtkutil.c (xg_tool_bar_menu_proxy): Handle label in tool bar item.
(xg_make_tool_item, xg_show_toolbar_item): New function.
(update_frame_tool_bar): Take label from TOOL_BAR_ITEM_LABEL.
Call xg_make_tool_item to make a tool bar item.
Call xg_show_toolbar_item.  Use wtoolbar instead of x->toolbar_widget.

* xterm.c (x_draw_image_relief): Take Vtool_bar_button_margin
into account for toolbars.

* vc-dir.el (vc-dir-tool-bar-map): Add :label on some tool bar items.

* tool-bar.el (tool-bar-setup): Add :label on some tool bar items.

* loadup.el: Load dynamic-setting.el if feature dynamic-setting
is present.

* info.el (info-tool-bar-map): Add labels.

* cus-start.el (all): Add tool-bar-style and tool-bar-max-label-size.

* cus-edit.el (custom-commands): Add labels for tool bar.
(custom-buffer-create-internal, Custom-mode): Adjust for
labels in custom-commands.

* dynamic-setting.el: Renamed from font-setting.el.

* buffer.c (init_buffer_once, syms_of_buffer): Remove its initialization.

* bidi.c (bidi_initialize): Simplify fallback_paragraph_*_re init.

* dispextern.h (TRY_WINDOW_CHECK_MARGINS)
(TRY_WINDOW_IGNORE_FONTS_CHANGE): New defines.

* xdisp.c (try_window): Change arg from CHECK_MARGINS to FLAGS.
Don't abort with fonts change if TRY_WINDOW_IGNORE_FONTS_CHANGE is
set in FLAGS.  Callers with non-zero CHECK_MARGINS changed to use
TRY_WINDOW_CHECK_MARGINS.

* xfns.c (Fx_show_tip): Call try_window with TRY_WINDOW_IGNORE_FONTS_CHANGE.

* keyboard.c (nonundocount): Remove extern declaration.
(command_loop_1): Remove brittle optimisation for cheap and common operations.
* xdisp.c (redisplay_internal): Don't bother checking
redisplay_performed_directly_p any more.
* sysdep.c (init_sys_modes): Don't call direct_output_forward_char any more.
* dispnew.c (redisplay_performed_directly_p)
(direct_output_for_insert, direct_output_forward_char):
* dispextern.h (redisplay_performed_directly_p)
(direct_output_for_insert, direct_output_forward_char): Remove.
* cmds.c (nonundocount): Make it static.

 bidi.c (bidi_get_next_char_visually): Improve commentary.
 dispextern.h (PRODUCE_GLYPHS): Set the reversed_p flag in the
 iterator's glyph_row here.
 xdisp.c (handle_invisible_prop, set_iterator_to_next)
 (next_element_from_buffer): Don't set the reversed_p flag in the
 iterator's glyph_row here.

* frame.c (x_get_arg): Handle RES_TYPE_BOOLEAN_NUMBER (bug #5736).

* xfns.c (Fx_create_frame): Make menuBar a RES_TYPE_BOOLEAN_NUMBER.

* dispextern.h (resource_types): RES_TYPE_BOOLEAN_NUMBER is new.

* xresources.texi (Table of Resources): Clarify toolBar number
for Gtk+.

* frames.texi (Menu Bars): menuBarLines => menuBar (bug#5736).

 xdisp.c (try_cursor_movement): Give up if rows are
 bidi-reordered and point moved backwards.  Examine all the
 candidate rows that occlude point, to return the best match.
 (row_containing_pos): With bidi-reordered rows, don't return the
 first one that occludes point; rather, examine all candidates and
 return the best match, with he glyph that's closest to point.
 (display_line): When looking for min position, don't consider
 negative values of glyph->charpos.  (Fixes a crash with "C-x 3" at
 ZV.)  Record the position after EOL in it->eol_pos, and use it to
 set end_pos of the last row produced for a continued line.  Fix
 the condition for passing candidate rows to set_cursor_from_row:
 check ends_at_zv_p flag of the best candidate row, not of the
 current row.
 dispextern.h (struct it): New member eol_pos.
 .gdbinit (prowlims): Display the ends_at_zv_p flag.

Region display and extension seems to work.
Solved a crash in bidirectional display of etc/HELLO.
(HELLO display still not 100% OK, e.g. near Kannada.)

 .gdbinit (pitx): Display some bidi information about the
 iterator.

 dispextern.h (BIDI_AT_BASE_LEVEL): Enclose definition in
 parentheses.

 xdisp.c (handle_stop_backwards): Save and restore it->current
 and it->position, instead of expecting the caller to do that.
 (next_element_from_buffer): When moving across stop_charpos,
 record it in prev_stop.  When IT_CHARPOS backs up, call
 handle_stop_backwards only if above the base embedding level.
 This solves the crash while displaying etc/HELLO in bidi mode.

Begin working on faces support.  First version of handle_stop_backwards.
Rearrange struct bidi_it for more efficient push/pop ops.

 dispextern.h (struct it): New members prev_stop and
 base_level_stop.

 xdisp.c (handle_stop_backwards): New function.
 (next_element_from_buffer): Handle the situation where we
 overstepped stop_charpos due to non-linearity of the bidi
 iteration.  Likewise for when we back up beyond the previous
 stop_charpos.
 (reseat_1, pop_it, push_it): Set prev_stop and base_level_stop.

 dispextern.h (BIDI_AT_BASE_LEVEL): New macro.

 bidi.c (bidi_copy_it): Fix compiler warning due to cast of a
 pointer to `int'.  Don't preserve the first_elt member, as it is
 no longer copied, because its position in the structure was
 changed, see below.

 dispextern.h (struct bidi_it): Move first_elt, new_paragraph,
 separator_limit, and paragraph_dir to after bidi_stack.  Add a
 note that anything beyond the level stack is not preserved when
 the bidi iterator state is copied/saved.

Continue working on set_cursor_from_row.
Cleanup of resolved_level and bidi_type members of struct glyph.

 xdisp.c (set_cursor_from_row): Fix off-by-one error when
 skipping over non-character glyphs at end of a reversed row.

 dispextern.h (struct glyph): The `resolved_level' member needs
 only 5 bits, not 6.  The `bidi_type' member needs only 3 bits.
 (bidi_type_t): Rearrange so that types that can appear in the
 resolved type are at the beginning and have values less than 8.

 bidi.c: Include setjmp.h.

Continue working on display of R2L glyph rows.  Reverse glyphs in
term.c:append_glyph rather than in extend_face_to_end_of_line.
Fix bidi iteration near BEGV and ZV.

 dispextern.h (struct glyph): New members resolved_level and
 bidi_type.

 xdisp.c (append_glyph, append_composite_glyph)
 (produce_image_glyph, append_stretch_glyph): Set them.

 term.c (append_glyph): Ditto.

 xdisp.c (display_line, next_element_from_buffer): Set the glyph
 row's reversed_p flag if the paragraph base direction is odd.
 (extend_face_to_end_of_line): Don't reverse the glyphs here.

 term.c (append_glyph): Reverse glyphs here.

 bidi.c (bidi_get_next_char_visually): Don't exit early when at ZV.
 (bidi_paragraph_init): Don't step over a newline if at BEGV.
 (bidi_paragraph_init): Handle empty buffers.

Finish up working on paragraph's base direction.
Start working on display of right-to-left glyph rows.
Rewrite set_cursor_from_row to support bidi.

 xdisp.c (string_buffer_position_lim): New function.
 (string_buffer_position): Most of code moved to
 string_buffer_position_lim.  Last argument and return value are
 now EMACS_INT; all callers changed.
 (set_cursor_from_row): Rewritten to support bidirectional text and
 reversed glyph rows.
 dispextern.h <string_buffer_position>: Update prototype.
 bidi.c (bidi_paragraph_init): Fix initialization of POS.
 dispextern.h (struct glyph_row): New member reversed_p.
 buffer.c (syms_of_buffer): Remove DEFVAR_LISP_NOPRO for
 default-direction-reversed, default-bidi-display-reordering, and
 default-paragraph-direction.

Continue working on paragraph base direction.
Support per-buffer default paragraph direction.

 buffer.h (struct buffer): New member paragraph_direction.
 buffer.c (init_buffer_once): Initialize it.
 (syms_of_buffer): Declare Lisp variables
 default-paragraph-direction and paragraph-direction.
 dispextern.h (struct it): New member paragraph_embedding.
 xdisp.c (init_iterator): Initialize it from the buffer's value
 of paragraph-direction.
 <Qright_to_left, Qleft_to_right>: New variables.
 (syms_of_xdisp): Initialize and staticpro them.
 (set_iterator_to_next, next_element_from_buffer): Use the value of
 paragraph_embedding to determine the paragraph direction.
 bidi.c (bidi_line_init): Fix second argument to
 bidi_set_sor_type.
 (bidi_init_it): Initialize paragraph_dir to NEUTRAL_DIR.
 (bidi_get_next_char_visually): Record the last character of the
 separator in separator_limit, not the character after that.
 (bidi_find_paragraph_start): Accept character and byte positions
 instead of the whole iterator stricture.  All callers changed.

Continue working on determining paragraph's base direction.

 bidi.c (bidi_at_paragraph_end): Check for paragraph-start if
 paragraph-separate failed to match.  Return the length of the
 matched separator.
 (bidi_line_init): New function.
 (bidi_paragraph_init): Use bidi_line_init.  Do nothing if in the
 middle of a paragraph-separate sequence.  Don't override existing
 paragraph direction if no strong characters found in this
 paragraph.  Set separator_limit according to what
 bidi_at_paragraph_end returns.  Reset new_paragraph flag when a
 new paragraph is found.
 (bidi_init_it): Reset separator_limit.
 dispextern.h (struct bidi_it): New member separator_limit.
 bidi.c (bidi_find_paragraph_start): Return the byte position of
 the paragraph beginning.
 xdisp.c (set_iterator_to_next): Call bidi_paragraph_init if the
 new_paragraph flag is set in the bidi iterator.
 bidi.c (bidi_at_paragraph_end, bidi_find_paragraph_start): Use
 the buffer-local value of paragraph-start and paragraph-separate.

Detect paragraph start and paragraph separators (part of determining
paragraph base direction).

(The commit of window.h belongs to the original changes by Kenichi Handa,
it was forgotten earlier.)

 bidi.c (bidi_set_paragraph_end): Don't set the new_paragraph
 flag in the iterator.
 (bidi_init_it): Set the new_paragraph flag.
 (bidi_at_paragraph_end): Arguments are now character and byte
 position of the next character.  All callers changed.
 (bidi_resolve_explicit): Don't call bidi_at_paragraph_end, and
 don't behave as if at paragraph end if it returns true.
 (bidi_get_next_char_visually): Don't call bidi_paragraph_init if
 new_paragraph flag is set.  Set new_paragraph flag when at end of
 a paragraph.
 <fallback_paragraph_start_re, fallback_paragraph_separate_re>: New
 variables.
 <Qparagraph_start, Qparagraph_separate>: New variables.
 (bidi_initialize): Initialize and staticpro them.
 dispextern.h <struct bidi_it>: New element paragraph_dir.  Make
 positional elements EMACS_INT.
 bidi.c <bidi_overriding_paragraph_direction>: Delete.

Support character mirroring.
Support iteration that starts in the middle of a line.
Misc cleanups.

 xdisp.c (next_element_from_buffer): If called not at line
 beginning, start bidi iteration from line beginning.
 bidi.c (bidi_paragraph_init): Use
 bidi_overriding_paragraph_direction instead of a literal zero.
 (bidi_initialize): Fix some character types, per Unicode 5.x.
 (bidi_get_type): Abort if called with invalid character code.
 dispextern.h: Add prototype of bidi_mirror_char.
 xdisp.c (get_next_display_element): Mirror characters whose
 resolved type is STRONG_R.

Continued working on initialization.
Started working on paragraph direction initialization.

 bidi.c (bidi_paragraph_init): Don't set bidi_it->ch_len.  Abort
 if called not at beginning of a new paragraph.
 (bidi_get_next_char_visually): Prepare and use a sentinel iterator
 state when first_elt flag is set.
 dispextern.h (struct bidi_it): New struct member first_elt.
 bidi.c (bidi_init_it): Initialize bidi_it->first_elt.
 (bidi_copy_it): Don't copy the first_elt flag.
 xdisp.c (reseat_1): Initialize bidi_it.first_elt.  Move bidi
 scan start code from here...
 (next_element_from_buffer): ...to here.  Use bidi_it.first_elt flag.

Begin work on bidi initialization and other cleanup.
Remove all STANDALONE code from bidi.c.

 xdisp.c (init_iterator): Call bidi_init_it.  Set
 bidi_it->bytepos if buffer position specified.
 (reseat_1): Don't call bidi_init_it.  Call bidi_paragraph_init
 instead.  Move back to preceding character before the call to
 bidi_get_next_char_visually.
 bidi.c: Remove all STANDALONE parts.
 (bidi_init_it): Init bidi_it->charpos and bidi_it->bytepos to -1.
 Don't call bidi_paragraph_init.  Change arguments.
 (bidi_paragraph_init): Remove code for negative pos.
 dispextern.h <bidi_it>: Rename orig_type to type_after_w1 and
 pristine_type to orig_type.

Undo changes from 2009-09-11.  Set row->end and row->start in
xdisp.c:display_line.

 dispnew.c (direct_output_for_insert): Give up if we are
 reordering bidirectional text.
 dispextern.h (IT_STACK_SIZE): Enlarge to 5.
 xdisp.c (display_line): Set row->end and it->start for the next
 row to the next character in logical order.  If we are reordering
 bidi text, push and pop the iterator before and after momentarily
 iterating in logical order.