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Makefile.in (obj): Include bidi.o. (bidi.o): New target. makefile.w32-in (OBJ1): Add $(BLD)/bidi.$(O). ($(BLD)/bidi.$(O)): New target. bidi.c: New file. buffer.h (struct buffer): New members bidi_display_reordering and bidi_paragraph_direction. buffer.c (init_buffer_once): Initialize bidi_display_reordering and bidi_paragraph_direction. (syms_of_buffer): Declare Lisp variables bidi-display-reordering and bidi-paragraph-direction. (Fbuffer_swap_text): Swap the values of bidi_display_reordering and bidi_paragraph_direction. dispextern.h (BIDI_MAXLEVEL, BIDI_AT_BASE_LEVEL): New macros. (bidi_type_t, bidi_dir_t): New types. (bidi_saved_info, bidi_stack, bidi_it): New structures. (struct it): New members bidi_p, bidi_it, paragraph_embedding, prev_stop, base_level_stop, and eol_pos. (bidi_init_it, bidi_get_next_char_visually): New prototypes. (IT_STACK_SIZE): Enlarge to 5. (struct glyph_row): New member reversed_p. <string_buffer_position>: Update prototype. (PRODUCE_GLYPHS): Set the reversed_p flag in the iterator's glyph_row if bidi_it.paragraph_dir == R2L. (struct glyph): New members resolved_level and bidi_type. dispnew.c (direct_output_forward_char): Give up if we need bidi processing or buffer's direction is right-to-left. (prepare_desired_row): Preserve the reversed_p flag. (row_equal_p): Compare the reversed_p attributes as well. xdisp.c (init_iterator): Initialize it->bidi_p. Call bidi_init_it and set it->paragraph_embedding from the current buffer's value of bidi_paragraph_direction. (reseat_1): Initialize bidi_it.first_elt. (set_iterator_to_next, next_element_from_buffer): Use the value of paragraph_embedding to determine the paragraph direction. (set_iterator_to_next): Under bidi reordering, call bidi_get_next_char_visually. Call bidi_paragraph_init if the new_paragraph flag is set in the bidi iterator. (next_element_from_buffer): If bidi_it.first_elt is set, initialize paragraph direction and find the first character to display in the visual order. If reseated to a middle of a line, prime the bidi iterator starting at the line's beginning. 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. When moving across stop_charpos, record it in prev_stop. (display_line): Set row->end and it->start for the next row to the next character in logical order. Always extend reversed_p rows to the end of line, even if they end at ZV. Copy the reversed_p flag to the next glyph row. Keep calling set_cursor_from_row for bidi-reordered rows even if we already have a possible candidate for cursor position. Set row_end after all the row's glyphs have been produced, by looping over the glyphs. 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. <Qright_to_left, Qleft_to_right>: New variables. (syms_of_xdisp): Initialize and staticpro them. (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. (text_outside_line_unchanged_p, try_window_id): Disable optimizations if we are reordering bidirectional text and the paragraph direction can be affected by the change. (append_glyph, append_composite_glyph) (produce_image_glyph, append_stretch_glyph): Set the resolved_level and bidi_type members of each glyph. (append_glyph): If the glyph row is reversed, prepend the glyph rather than appending it. (handle_stop_backwards): New function. (reseat_1, pop_it, push_it): Set prev_stop and base_level_stop. (reseat): call handle_stop_backwards to recompute prev_stop and base_level_stop for the new position. (handle_invisible_prop): Under bidi iteration, skip invisible text using bidi_get_next_char_visually. If we are `reseat'ed, init the paragraph direction. Update IT->prev_stop after skipping invisible text. (move_it_in_display_line_to): New variables prev_method and prev_pos. Compare for strict equality in BUFFER_POS_REACHED_P. (try_cursor_movement): Examine all the candidate rows that occlude point, to return the best match. If rows are bidi-reordered and point moved backwards, back up to the row that is not a continuation line, and start looking for a suitable row from there. term.c (append_glyph): Reverse glyphs by pre-pending them, rather than appending, if the glyph_row's reversed_p flag is set. Set the resolved_level and bidi_type members of each glyph. .gdbinit (pbiditype): New command. (pgx): Use it to display bidi level and type of the glyph. (pitx): Display some bidi information about the iterator. (prowlims, pmtxrows): New commands. files.el: Make bidi-display-reordering safe variable for boolean values. mule.texi (International): Mention support of bidirectional editing. (Bidirectional Editing): New section. HELLO: Reorder Arabic and Hebrew into logical order, and insert RLM before the opening paren, to make the display more reasonable. Add setting for bidi-display-reordering in the local variables section. NEWS: Mention initial support for bidirectional editing.
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171 lines
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Plaintext
GNU Emacs NEWS -- history of user-visible changes.
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Copyright (C) 2010 Free Software Foundation, Inc.
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See the end of the file for license conditions.
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Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
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If possible, use M-x report-emacs-bug.
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This file is about changes in Emacs version 24.
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See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
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and NEWS.1-17 for changes in older Emacs versions.
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You can narrow news to a specific version by calling `view-emacs-news'
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with a prefix argument or by typing C-u C-h C-n.
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Temporary note:
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+++ indicates that the appropriate manual has already been updated.
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--- means no change in the manuals is called for.
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When you add a new item, please add it without either +++ or ---
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so we will look at it and add it to the manual.
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* Installation Changes in Emacs 24.1
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---
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** There are new configure options:
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--with-mmdf, --with-mail-unlink, --with-mailhost.
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These provide no new functionality, they just remove the need to edit
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lib-src/Makefile by hand in order to use the associated features.
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* Startup Changes in Emacs 24.1
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* Changes in Emacs 24.1
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+++
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** Emacs now supports display and editing of bidirectional text.
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Warning: This is still very much experimental! The existing support
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is minimal, and when it's turned on (see below), many features are
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likely to give unexpected results, or break, or even crash! Use at
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your own risk!
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See the node "Bidirectional Editing" in the Emacs Manual for some
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initial documentation.
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To turn this on in any given buffer, set the buffer-local variable
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`bidi-display-reordering' to a non-nil value. The default is nil.
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The buffer-local variable `bidi-paragraph-direction', if non-nil,
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forces each paragraph in the buffer to have its base direction
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according to the value of this variable. Possible values are
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`right-to-left' and `left-to-right'. If the value is nil (the
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default), Emacs determines the base direction of each paragraph from
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its text, as specified by the Unicode Bidirectional Algorithm.
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Reordering of bidirectional text for display in Emacs is a "Full
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bidirectionality" class implementation of the Unicode Bidirectional
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Algorithm.
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** GTK scroll-bars are now placed on the right by default.
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Use `set-scroll-bar-mode' to change this.
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* Editing Changes in Emacs 24.1
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* Changes in Specialized Modes and Packages in Emacs 24.1
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** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
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** Customize
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*** Customize buffers now contain a search field.
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The search is performed using `customize-apropos'.
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To turn off the search field, set custom-search-field to nil .
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*** Custom options now start out hidden if at their default values.
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Use the arrow to the left of the option name to toggle visibility.
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*** custom-buffer-sort-alphabetically now defaults to t.
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*** The color widget now has a "Choose" button, which allows you to
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choose a color via list-colors-display.
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** VC and related modes
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*** vc-dir for Bzr supports viewing shelve contents and shelving snapshots.
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*** Special markup can be added to log-edit buffers.
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**** For Bzr, adding an
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Author: NAME
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line will add "--author NAME" to the "bzr commit" command.
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**** For Hg, adding an
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Author: NAME
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line will add "--user NAME" to the "hg commit" command.
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** Directory local variables can apply to file-less buffers.
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For example, adding "(diff-mode . ((mode . whitespace)))" to your
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.dir-locals.el file, will turn on `whitespace-mode' for *vc-diff*
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buffers.
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** s-region.el is now declared obsolete, superceded by shift-select-mode
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enabled by default in 23.1.
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** gdb-mi
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*** GDB User Interface migrated to GDB Machine Interface and now
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supports multithread non-stop debugging and debugging of several
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threads simultaneously.
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* New Modes and Packages in Emacs 24.1
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** secrets.el is an implementation of the Secret Service API, an
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interface to password managers like GNOME Keyring or KDE Wallet. The
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Secret Service API requires D-Bus for communication.
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* Incompatible Lisp Changes in Emacs 24.1
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* Lisp changes in Emacs 24.1
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** New completion style `substring'.
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** Image API
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*** When the image type is one of listed in `image-animated-types'
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and the number of sub-images in the image is more then one, then the
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new function `create-animated-image' creates an animated image where
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sub-images are displayed successively with the duration defined by
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`image-animate-max-time' and the delay between sub-images defined
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by the Graphic Control Extension of the image.
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** Progress reporters can now "spin".
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The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
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now be nil, or omitted. This makes a "non-numeric" reporter. Each
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time you call `progress-reporter-update' on that progress reporter,
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with a nil or omitted VALUE argument, the reporter message is
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displayed with a "spinning bar".
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* Changes in Emacs 24.1 on non-free operating systems
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----------------------------------------------------------------------
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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Local variables:
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mode: outline
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paragraph-separate: "[ ]*$"
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end:
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