code.delx.au - gnu-emacs/blob - src/ChangeLog.bidi

   1 2009-12-26  Eli Zaretskii  <eliz@gnu.org>
   2
   3         * xdisp.c (handle_stop_backwards): Call compute_stop_pos in the
   4         loop, instead of calling handle_stop.  Call handle_stop only once,
   5         after the loop.
   6         (next_element_from_buffer): Don't call handle_stop_backwards if at
   7         stop position.  If base_level_stop is zero, set it to 1.
   8
   9         * term.c (append_glyph): Fill resolved_level and bidi_type slots
  10         of struct glyph for unidirectional display.
  11
  12         * xdisp.c (set_cursor_from_row): Handle zero-width characters.
  13
  14         * bidi.c (bidi_mirror_char): More efficient code (suggested by
  15         Ehud Karni <ehud@unix.mvs.co.il>).  Don't even try to mirror
  16         non-ASCII characters.
  17
  18 2009-12-19  Eli Zaretskii  <eliz@gnu.org>
  19
  20         * buffer.c (Fbuffer_swap_text): Swap the values of
  21         bidi_display_reordering and bidi_paragraph_direction.
  22
  23         * bidi.c (bidi_resolve_weak): Fix nesting of conditions for Wn
  24         processing.  Move W3 after W1 and W2.  Simplify W4 because it is
  25         now always after W1.
  26
  27         * .gdbinit (pbiditype): New command.
  28         (pgx): Use it to display bidi level and type of the glyph.
  29
  30 2009-12-12  Eli Zaretskii  <eliz@gnu.org>
  31
  32         * dispextern.h (struct it): New members prev_stop and
  33         base_level_stop.
  34
  35         * xdisp.c (handle_stop_backwards): New function.
  36         (next_element_from_buffer): Handle the situation where we
  37         overstepped stop_charpos due to non-linearity of the bidi
  38         iteration.  Likewise for when we back up beyond the previous
  39         stop_charpos.
  40         (reseat_1, pop_it, push_it): Set prev_stop and base_level_stop.
  41
  42         * dispextern.h (BIDI_AT_BASE_LEVEL): New macro.
  43
  44         * bidi.c (bidi_copy_it): Fix compiler warning due to cast of a
  45         pointer to `int'.  Don't preserve the first_elt member, as it is
  46         no longer copied, because its position in the structure was
  47         changed, see below.
  48
  49         * dispextern.h (struct bidi_it): Move first_elt, new_paragraph,
  50         separator_limit, and paragraph_dir to after bidi_stack.  Add a
  51         note that anything beyond the level stack is not preserved when
  52         the bidi iterator state is copied/saved.
  53
  54 2009-11-21  Eli Zaretskii  <eliz@gnu.org>
  55
  56         * xdisp.c (set_cursor_from_row): Fix cursor positioning on empty
  57         lines when integer values of `cursor' property is used on display
  58         strings.
  59
  60 2009-11-14  Eli Zaretskii  <eliz@gnu.org>
  61
  62         * xdisp.c (init_iterator, text_outside_line_unchanged_p)
  63         (try_window_id): Rename paragraph_direction to
  64         bidi_paragraph_direction.
  65         (set_cursor_from_row): Handle integer values of `cursor' property
  66         on display strings.
  67
  68         * buffer.c (init_buffer_once, syms_of_buffer): Rename
  69         paragraph_direction to bidi_paragraph_direction.
  70
  71         * buffer.h (struct buffer): Rename paragraph_direction to
  72         bidi_paragraph_direction.
  73
  74 2009-11-07  Eli Zaretskii  <eliz@gnu.org>
  75
  76         * bidi.c (bidi_paragraph_init): Don't overstep end of buffer.
  77         Treat end of buffer as a NEUTRAL_B character.
  78         (bidi_resolve_explicit): Don't special-case ZV when bidi_it->type
  79         is NEUTRAL_B, since bidi_set_paragraph_end no longer sets the
  80         new_paragraph flag.
  81
  82 2009-10-31  Eli Zaretskii  <eliz@gnu.org>
  83
  84         * xdisp.c (display_line): Always extend reversed_p rows to the end
  85         of line.
  86         (set_cursor_from_row): In R2L rows that don't display text, put
  87         the cursor on the rightmost glyph.
  88
  89 2009-10-24  Eli Zaretskii  <eliz@gnu.org>
  90
  91         * xdisp.c (set_cursor_from_row): Fix off-by-one error when
  92         skipping over non-character glyphs at end of a reversed row.
  93
  94         * dispextern.h (struct glyph): The `resolved_level' member needs
  95         only 5 bits, not 6.  The `bidi_type' member needs only 3 bits.
  96         (bidi_type_t): Rearrange so that types that can appear in the
  97         resolved type are at the beginning and have values less than 8.
  98
  99 2009-10-23  Eli Zaretskii  <eliz@gnu.org>
 100
 101         * bidi.c: Include setjmp.h.
 102
 103 2009-10-17  Eli Zaretskii  <eliz@gnu.org>
 104
 105         * dispextern.h (struct glyph): New members resolved_level and
 106         bidi_type.
 107
 108         * xdisp.c (append_glyph, append_composite_glyph)
 109         (produce_image_glyph, append_stretch_glyph): Set them.
 110
 111         * term.c (append_glyph): Ditto.
 112
 113         * xdisp.c (display_line, next_element_from_buffer): Set the glyph
 114         row's reversed_p flag if the paragraph base direction is odd.
 115         (extend_face_to_end_of_line): Don't reverse the glyphs here.
 116
 117         * term.c (append_glyph): Reverse glyphs here.
 118
 119         * bidi.c (bidi_get_next_char_visually): Don't exit early when at
 120         ZV.
 121         (bidi_paragraph_init): Don't step over a newline if at BEGV.
 122
 123 2009-10-16  Eli Zaretskii  <eliz@gnu.org>
 124
 125         * bidi.c (bidi_paragraph_init): Handle empty buffers.
 126
 127 2009-10-10  Eli Zaretskii  <eliz@gnu.org>
 128
 129         * xdisp.c (set_cursor_from_row): Skip over glyphs near end of row
 130         with integer OBJECT even if their CHARPOS is zero.
 131
 132         * bidi.c (bidi_cache_iterator_state): Don't cache NEW_PARAGRAPH.
 133         Abort if someone tries to add a cached state whose position is not
 134         the immediate successor to that of the last cached state.
 135         (bidi_paragraph_init): Don't bail out too early after a reseat.
 136
 137 2009-10-09  Eli Zaretskii  <eliz@gnu.org>
 138
 139         * xdisp.c (text_outside_line_unchanged_p, try_window_id): Disable
 140         optimizations if we are reordering bidirectional text and the
 141         paragraph direction can be affected by the change.
 142
 143 2009-10-08  Eli Zaretskii  <eliz@gnu.org>
 144
 145         * xdisp.c (string_buffer_position_lim): New function.
 146         (string_buffer_position): Most of code moved to
 147         string_buffer_position_lim.  Last argument and return value are
 148         now EMACS_INT; all callers changed.
 149         (set_cursor_from_row): Rewritten to support bidirectional text and
 150         reversed glyph rows.
 151
 152         dispextern.h <string_buffer_position>: Update prototype.
 153
 154 2009-10-07  Eli Zaretskii  <eliz@gnu.org>
 155
 156         * bidi.c (bidi_paragraph_init): Fix initialization of POS.
 157
 158         * dispextern.h (struct glyph_row): New member reversed_p.
 159
 160 2009-10-06  Eli Zaretskii  <eliz@gnu.org>
 161
 162         * buffer.c (syms_of_buffer): Remove DEFVAR_LISP_NOPRO for
 163         default-direction-reversed, default-bidi-display-reordering, and
 164         default-paragraph-direction.
 165
 166 2009-10-05  Eli Zaretskii  <eliz@gnu.org>
 167
 168         * buffer.h (struct buffer): New member paragraph_direction.
 169         * buffer.c (init_buffer_once): Initialize it.
 170         (syms_of_buffer): Declare Lisp variables
 171         default-paragraph-direction and paragraph-direction.
 172
 173         * dispextern.h (struct it): New member paragraph_embedding.
 174         * xdisp.c (init_iterator): Initialize it from the buffer's value
 175         of paragraph-direction.
 176         <Qright_to_left, Qleft_to_right>: New variables.
 177         (syms_of_xdisp): Initialize and staticpro them.
 178         (set_iterator_to_next, next_element_from_buffer): Use the value of
 179         paragraph_embedding to determine the paragraph direction.
 180
 181         * bidi.c (bidi_line_init): Fix second argument to
 182         bidi_set_sor_type.
 183         (bidi_init_it): Initialize paragraph_dir to NEUTRAL_DIR.
 184         (bidi_get_next_char_visually): Record the last character of the
 185         separator in separator_limit, not the character after that.
 186         (bidi_find_paragraph_start): Accept character and byte positions
 187         instead of the whole iterator stricture.  All callers changed.
 188
 189 2009-10-04  Eli Zaretskii  <eliz@gnu.org>
 190
 191         * bidi.c (bidi_at_paragraph_end): Check for paragraph-start if
 192         paragraph-separate failed to match.  Return the length of the
 193         matched separator.
 194         (bidi_line_init): New function.
 195         (bidi_paragraph_init): Use bidi_line_init.  Do nothing if in the
 196         middle of a paragraph-separate sequence.  Don't override existing
 197         paragraph direction if no strong characters found in this
 198         paragraph.  Set separator_limit according to what
 199         bidi_at_paragraph_end returns.  Reset new_paragraph flag when a
 200         new paragraph is found.
 201         (bidi_init_it): Reset separator_limit.
 202
 203         * dispextern.h (struct bidi_it): New member separator_limit.
 204
 205         * bidi.c (bidi_find_paragraph_start): Return the byte position of
 206         the paragraph beginning.
 207
 208         * xdisp.c (set_iterator_to_next): Call bidi_paragraph_init if the
 209         new_paragraph flag is set in the bidi iterator.
 210
 211         * bidi.c (bidi_at_paragraph_end, bidi_find_paragraph_start): Use
 212         the buffer-local value of paragraph-start and paragraph-separate.
 213
 214 2009-10-03  Eli Zaretskii  <eliz@gnu.org>
 215
 216         * bidi.c (bidi_set_paragraph_end): Don't set the new_paragraph
 217         flag in the iterator.
 218         (bidi_init_it): Set the new_paragraph flag.
 219         (bidi_at_paragraph_end): Arguments are now character and byte
 220         position of the next character.  All callers changed.
 221         (bidi_resolve_explicit): Don't call bidi_at_paragraph_end, and
 222         don't behave as if at paragraph end if it returns true.
 223         (bidi_get_next_char_visually): Don't call bidi_paragraph_init if
 224         new_paragraph flags is set.  Set new_paragraph flag when at end of
 225         a paragraph.
 226         <fallback_paragraph_start_re, fallback_paragraph_separate_re>: New
 227         variables.
 228         <Qparagraph_start, Qparagraph_separate>: New variables.
 229         (bidi_initialize): Initialize and staticpro them.
 230
 231         * dispextern.h <struct bidi_it>: New element paragraph_dir.  Make
 232         positional elements EMACS_INT.
 233
 234         * bidi.c <bidi_overriding_paragraph_direction>: Delete.
 235
 236 2009-09-28  Eli Zaretskii  <eliz@gnu.org>
 237
 238         * bidi.c (bidi_init_it): Initialize charpos, bytepos, and
 239         first_elt before calling bidi_set_paragraph_end.
 240         (bidi_resolve_explicit): Don't call bidi_set_paragraph_end at
 241         EOB.
 242         (bidi_at_paragraph_end): Don't set new_paragraph flag at EOB.
 243         (bidi_get_type): Accept an additional argument OVERRIDE, per UAX#9
 244         "Explicit Overrides".  All callers changed.
 245
 246 2009-09-27  Eli Zaretskii  <eliz@gnu.org>
 247
 248         * xdisp.c (next_element_from_buffer): If called not at line
 249         beginning, start bidi iteration from line beginning.
 250
 251         * bidi.c (bidi_paragraph_init): Use
 252         bidi_overriding_paragraph_direction instead of a literal zero.
 253         (bidi_initialize): Fix some character types, per Unicode 5.x.
 254         (bidi_get_type): Abort if called with invalid character code.
 255
 256         * dispextern.h: Add prototype of bidi_mirror_char.
 257
 258         * xdisp.c (get_next_display_element): Mirror characters whose
 259         resolved type is STRONG_R.
 260
 261 2009-09-26  Eli Zaretskii  <eliz@gnu.org>
 262
 263         * bidi.c (bidi_paragraph_init): Don't set bidi_it->ch_len.  Abort
 264         if called not at beginning of a new paragraph.
 265         (bidi_get_next_char_visually): Prepare and use a sentinel iterator
 266         state when first_elt flag is set.
 267
 268         * dispextern.h (struct bidi_it): New struct member first_elt.
 269
 270         * bidi.c (bidi_init_it): Initialize bidi_it->first_elt.
 271         (bidi_copy_it): Don't copy the first_elt flag.
 272
 273         * xdisp.c (reseat_1): Initialize bidi_it.first_elt.  Move bidi
 274         scan start code from here...
 275         (next_element_from_buffer): ...to here.  Use bidi_it.first_elt
 276         flag.
 277
 278 2009-09-20  Eli Zaretskii  <eliz@gnu.org>
 279
 280         * xdisp.c (reseat_1): Handle position < BEGV.
 281
 282         * bidi.c (bidi_paragraph_init): Set bidi_it->ch_len.  Handle ZV.
 283         (bidi_init_it): Don't initialize bidi_it->ch_len.
 284         (bidi_resolve_explicit_1): Abort if bidi_it->ch_len was not
 285         initialized.
 286         (bidi_at_paragraph_end, bidi_resolve_explicit_1)
 287         (bidi_resolve_weak, bidi_level_of_next_char): Handle bytepos at
 288         ZV_BYTE.
 289         (bidi_resolve_explicit_1): Handle position < BEGV.
 290
 291 2009-09-19  Eli Zaretskii  <eliz@gnu.org>
 292
 293         * xdisp.c (init_iterator): Call bidi_init_it.  Set
 294         bidi_it->bytepos if buffer position specified.
 295         (reseat_1): Don't call bidi_init_it.  Call bidi_paragraph_init
 296         instead.  Move back to preceding character before the call to
 297         bidi_get_next_char_visually.
 298
 299         * bidi.c: Remove all STANDALONE parts.
 300         (bidi_init_it): Init bidi_it->charpos and bidi_it->bytepos to -1.
 301         Don't call bidi_paragraph_init.  Change arguments.
 302         (bidi_paragraph_init): Remove code for negative pos.
 303
 304         * dispextern.h <bidi_it>: Rename orig_type to type_after_w1 and
 305         pristine_type to orig_type.
 306
 307 2009-09-12  Eli Zaretskii  <eliz@gnu.org>
 308
 309         * dispnew.c (direct_output_for_insert): Give up if we are
 310         reordering bidirectional text.
 311
 312         * dispextern.h (IT_STACK_SIZE): Enlarge to 5.
 313
 314         * xdisp.c (display_line): Set row->end and it->start for the next
 315         row to the next character in logical order.  If we are reordering
 316         bidi text, push and pop the iterator before and after momentarily
 317         iterating in logical order.
 318
 319 2009-09-11  Eli Zaretskii  <eliz@gnu.org>
 320
 321         Note: The following changes were undone on 2009-09-12.
 322
 323         * xdisp.c (set_iterator_to_next, reseat, reseat_1)
 324         (reseat_at_next_visible_line_start): Accept additional argument
 325         force_logical_p; all callers changed.  If force_logical_p is
 326         non-zero, force iteration in buffer's logical order even in bidi
 327         buffers.
 328
 329         * dispnew.c (direct_output_for_insert): Call set_iterator_to_next
 330         with additional argument zero.
 331
 332         * dispextern.h (set_iterator_to_next): Now accepts an additional
 333         argument.
 334
 335 2009-08-29  Eli Zaretskii  <eliz@gnu.org>
 336
 337         * xdisp.c (set_cursor_from_row): Don't assume glyph->charpos
 338         increments linearly.
 339         (try_window_reusing_current_matrix): Don't assume glyph->charpos
 340         increments linearly.
 341
 342 2009-08-28  Eli Zaretskii  <eliz@gnu.org>
 343
 344         * bidi.c <bidi_overriding_paragraph_direction>: Default to L2R,
 345         for now.
 346
 347 2009-08-22  Eli Zaretskii  <eliz@gnu.org>
 348
 349         * bidi.c (bidi_initialize): staticpro bidi_char_table.
 350         (bidi_check_type): New function.
 351         (bidi_cache_iterator_state, bidi_remember_char)
 352         (bidi_resolve_explicit_1, bidi_resolve_explicit)
 353         (bidi_resolve_weak, bidi_resolve_neutral)
 354         (bidi_level_of_next_char): Use it to validate the bidi type
 355         assigned to the iterator.
 356
 357 2009-08-15  Eli Zaretskii  <eliz@gnu.org>
 358
 359         * bidi.c (bidi_initialize): Fix initialization of bidi_type_table.
 360
 361         * xdisp.c (set_iterator_to_next): Fix position setting after call
 362         to bidi_get_next_char_visually.
 363
 364 2005-12-03  Eli Zaretskii  <eliz@gnu.org>
 365
 366         * bidi.c: Include stdio.h unconditionally.  Fix and elaborate
 367         commentary.  Add Copyright blurb.
 368
 369 2004-03-08  Kenichi Handa  <handa@m17n.org>
 370
 371         * xdisp.c (reseat_1): Call bidi_init_it with a previous position.
 372
 373         * bidi.c (bidi_init_it): Set bidi_it->ch_len even if POS > 0.
 374
 375 2004-03-04  Kenichi Handa  <handa@m17n.org>
 376
 377         The following changes are to support bidirectional text display.
 378
 379         * Makefile.in (obj): Include bidi.o.
 380         (bidi.o): New target.
 381
 382         * bidi.c: New file.
 383
 384         * buffer.h (struct buffer): New member bidi_display_reordering.
 385
 386         * buffer.c (init_buffer_once): Initialize bidi_display_reordering.
 387         (syms_of_buffer): Declarations of Lisp variables
 388         default-bidi-display-reordering and bidi-display-reordering.
 389
 390         * dispextern.h (BIDI_MAXLEVEL): New macro.
 391         (bidi_type_t, bidi_dir_t): New types.
 392         (bidi_saved_info, bidi_stack, bidi_it): New structs.
 393         (struct it): New members bidi_p and bidi_it.
 394         (bidi_init_it): Extern it.
 395         (bidi_get_next_char_visually): Extern it.
 396
 397         * dispnew.c (direct_output_forward_char): Give up if we need bidi
 398         processing or buffer's direction is right-to-left.
 399
 400         * xdisp.c (init_iterator): Initialize it->bidi_p.
 401         (reseat_1): Cal bidi_init_it and bidi_get_next_char_visually if
 402         necessary.
 403         (set_iterator_to_next): Cal bidi_get_next_char_visually if
 404         necessary.
 405
 406
 407 ;; Local Variables:
 408 ;; coding: utf-8
 409 ;; add-log-time-zone-rule: t
 410 ;; End:
 411
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