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

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