src/ChangeLog.bidi

   1 2009-10-05  Eli Zaretskii  <eliz@gnu.org>
   2
   3         * buffer.h (struct buffer): New member paragraph_direction.
   4         * buffer.c (init_buffer_once): Initialize it.
   5         (syms_of_buffer): Declare Lisp variables
   6         default-paragraph-direction and paragraph-direction.
   7
   8         * dispextern.h (struct it): New member paragraph_embedding.
   9         * xdisp.c (init_iterator): Initialize it from the buffer's value
  10         of paragraph-direction.
  11         <Qright_to_left, Qleft_to_right>: New variables.
  12         (syms_of_xdisp): Initialize and staticpro them.
  13         (set_iterator_to_next, next_element_from_buffer): Use the value of
  14         paragraph_embedding to determine the paragraph direction.
  15
  16         * bidi.c (bidi_line_init): Fix second argument to
  17         bidi_set_sor_type.
  18         (bidi_init_it): Initialize paragraph_dir to NEUTRAL_DIR.
  19         (bidi_get_next_char_visually): Record the last character of the
  20         separator in separator_limit, not the character after that.
  21         (bidi_find_paragraph_start): Accept character and byte positions
  22         instead of the whole iterator stricture.  All callers changed.
  23
  24 2009-10-04  Eli Zaretskii  <eliz@gnu.org>
  25
  26         * bidi.c (bidi_at_paragraph_end): Check for paragraph-start if
  27         paragraph-separate failed to match.  Return the length of the
  28         matched separator.
  29         (bidi_line_init): New function.
  30         (bidi_paragraph_init): Use bidi_line_init.  Do nothing if in the
  31         middle of a paragraph-separate sequence.  Don't override existing
  32         paragraph direction if no strong characters found in this
  33         paragraph.  Set separator_limit according to what
  34         bidi_at_paragraph_end returns.  Reset new_paragraph flag when a
  35         new paragraph is found.
  36         (bidi_init_it): Reset separator_limit.
  37
  38         * dispextern.h (struct bidi_it): New member separator_limit.
  39
  40         * bidi.c (bidi_find_paragraph_start): Return the byte position of
  41         the paragraph beginning.
  42
  43         * xdisp.c (set_iterator_to_next): Call bidi_paragraph_init if the
  44         new_paragraph flag is set in the bidi iterator.
  45
  46         * bidi.c (bidi_at_paragraph_end, bidi_find_paragraph_start): Use
  47         the buffer-local value of paragraph-start and paragraph-separate.
  48
  49 2009-10-03  Eli Zaretskii  <eliz@gnu.org>
  50
  51         * bidi.c (bidi_set_paragraph_end): Don't set the new_paragraph
  52         flag in the iterator.
  53         (bidi_init_it): Set the new_paragraph flag.
  54         (bidi_at_paragraph_end): Arguments are now character and byte
  55         position of the next character.  All callers changed.
  56         (bidi_resolve_explicit): Don't call bidi_at_paragraph_end, and
  57         don't behave as if at paragraph end if it returns true.
  58         (bidi_get_next_char_visually): Don't call bidi_paragraph_init if
  59         new_paragraph flags is set.  Set new_paragraph flag when at end of
  60         a paragraph.
  61         <fallback_paragraph_start_re, fallback_paragraph_separate_re>: New
  62         variables.
  63         <Qparagraph_start, Qparagraph_separate>: New variables.
  64         (bidi_initialize): Initialize and staticpro them.
  65
  66         * dispextern.h <struct bidi_it>: New element paragraph_dir.  Make
  67         positional elements EMACS_INT.
  68
  69         * bidi.c <bidi_overriding_paragraph_direction>: Delete.
  70
  71 2009-09-28  Eli Zaretskii  <eliz@gnu.org>
  72
  73         * bidi.c (bidi_init_it): Initialize charpos, bytepos, and
  74         first_elt before calling bidi_set_paragraph_end.
  75         (bidi_resolve_explicit): Don't call bidi_set_paragraph_end at
  76         EOB.
  77         (bidi_at_paragraph_end): Don't set new_paragraph flag at EOB.
  78         (bidi_get_type): Accept an additional argument OVERRIDE, per UAX#9
  79         "Explicit Overrides".  All callers changed.
  80
  81 2009-09-27  Eli Zaretskii  <eliz@gnu.org>
  82
  83         * xdisp.c (next_element_from_buffer): If called not at line
  84         beginning, start bidi iteration from line beginning.
  85
  86         * bidi.c (bidi_paragraph_init): Use
  87         bidi_overriding_paragraph_direction instead of a literal zero.
  88         (bidi_initialize): Fix some character types, per Unicode 5.x.
  89         (bidi_get_type): Abort if called with invalid character code.
  90
  91         * dispextern.h: Add prototype of bidi_mirror_char.
  92
  93         * xdisp.c (get_next_display_element): Mirror characters whose
  94         resolved type is STRONG_R.
  95
  96 2009-09-26  Eli Zaretskii  <eliz@gnu.org>
  97
  98         * bidi.c (bidi_paragraph_init): Don't set bidi_it->ch_len.  Abort
  99         if called not at beginning of a new paragraph.
 100         (bidi_get_next_char_visually): Prepare and use a sentinel iterator
 101         state when first_elt flag is set.
 102
 103         * dispextern.h (struct bidi_it): New struct member first_elt.
 104
 105         * bidi.c (bidi_init_it): Initialize bidi_it->first_elt.
 106         (bidi_copy_it): Don't copy the first_elt flag.
 107
 108         * xdisp.c (reseat_1): Initialize bidi_it.first_elt.  Move bidi
 109         scan start code from here...
 110         (next_element_from_buffer): ...to here.  Use bidi_it.first_elt
 111         flag.
 112
 113 2009-09-20  Eli Zaretskii  <eliz@gnu.org>
 114
 115         * xdisp.c (reseat_1): Handle position < BEGV.
 116
 117         * bidi.c (bidi_paragraph_init): Set bidi_it->ch_len.  Handle ZV.
 118         (bidi_init_it): Don't initialize bidi_it->ch_len.
 119         (bidi_resolve_explicit_1): Abort if bidi_it->ch_len was not
 120         initialized.
 121         (bidi_at_paragraph_end, bidi_resolve_explicit_1)
 122         (bidi_resolve_weak, bidi_level_of_next_char): Handle bytepos at
 123         ZV_BYTE.
 124         (bidi_resolve_explicit_1): Handle position < BEGV.
 125
 126 2009-09-19  Eli Zaretskii  <eliz@gnu.org>
 127
 128         * xdisp.c (init_iterator): Call bidi_init_it.  Set
 129         bidi_it->bytepos if buffer position specified.
 130         (reseat_1): Don't call bidi_init_it.  Call bidi_paragraph_init
 131         instead.  Move back to preceding character before the call to
 132         bidi_get_next_char_visually.
 133
 134         * bidi.c: Remove all STANDALONE parts.
 135         (bidi_init_it): Init bidi_it->charpos and bidi_it->bytepos to -1.
 136         Don't call bidi_paragraph_init.  Change arguments.
 137         (bidi_paragraph_init): Remove code for negative pos.
 138
 139         * dispextern.h <bidi_it>: Rename orig_type to type_after_w1 and
 140         pristine_type to orig_type.
 141
 142 2009-09-12  Eli Zaretskii  <eliz@gnu.org>
 143
 144         * dispnew.c (direct_output_for_insert): Give up if we are
 145         reordering bidirectional text.
 146
 147         * dispextern.h (IT_STACK_SIZE): Enlarge to 5.
 148
 149         * xdisp.c (display_line): Set row->end and it->start for the next
 150         row to the next character in logical order.  If we are reordering
 151         bidi text, push and pop the iterator before and after momentarily
 152         iterating in logical order.
 153
 154 2009-09-11  Eli Zaretskii  <eliz@gnu.org>
 155
 156         Note: The following changes were undone on 2009-09-12.
 157
 158         * xdisp.c (set_iterator_to_next, reseat, reseat_1)
 159         (reseat_at_next_visible_line_start): Accept additional argument
 160         force_logical_p; all callers changed.  If force_logical_p is
 161         non-zero, force iteration in buffer's logical order even in bidi
 162         buffers.
 163
 164         * dispnew.c (direct_output_for_insert): Call set_iterator_to_next
 165         with additional argument zero.
 166
 167         * dispextern.h (set_iterator_to_next): Now accepts an additional
 168         argument.
 169
 170 2009-08-29  Eli Zaretskii  <eliz@gnu.org>
 171
 172         * xdisp.c (set_cursor_from_row): Don't assume glyph->charpos
 173         increments linearly.
 174         (try_window_reusing_current_matrix): Don't assume glyph->charpos
 175         increments linearly.
 176
 177 2009-08-28  Eli Zaretskii  <eliz@gnu.org>
 178
 179         * bidi.c <bidi_overriding_paragraph_direction>: Default to L2R,
 180         for now.
 181
 182 2009-08-22  Eli Zaretskii  <eliz@gnu.org>
 183
 184         * bidi.c (bidi_initialize): staticpro bidi_char_table.
 185         (bidi_check_type): New function.
 186         (bidi_cache_iterator_state, bidi_remember_char)
 187         (bidi_resolve_explicit_1, bidi_resolve_explicit)
 188         (bidi_resolve_weak, bidi_resolve_neutral)
 189         (bidi_level_of_next_char): Use it to validate the bidi type
 190         assigned to the iterator.
 191
 192 2009-08-15  Eli Zaretskii  <eliz@gnu.org>
 193
 194         * bidi.c (bidi_initialize): Fix initialization of bidi_type_table.
 195
 196         * xdisp.c (set_iterator_to_next): Fix position setting after call
 197         to bidi_get_next_char_visually.
 198
 199 2005-12-03  Eli Zaretskii  <eliz@gnu.org>
 200
 201         * bidi.c: Include stdio.h unconditionally.  Fix and elaborate
 202         commentary.  Add Copyright blurb.
 203
 204 2004-03-08  Kenichi Handa  <handa@m17n.org>
 205
 206         * xdisp.c (reseat_1): Call bidi_init_it with a previous position.
 207
 208         * bidi.c (bidi_init_it): Set bidi_it->ch_len even if POS > 0.
 209
 210 2004-03-04  Kenichi Handa  <handa@m17n.org>
 211
 212         The following changes are to support bidirectional text display.
 213
 214         * Makefile.in (obj): Include bidi.o.
 215         (bidi.o): New target.
 216
 217         * bidi.c: New file.
 218
 219         * buffer.h (struct buffer): New member bidi_display_reordering.
 220
 221         * buffer.c (init_buffer_once): Initialize bidi_display_reordering.
 222         (syms_of_buffer): Declarations of Lisp variables
 223         default-bidi-display-reordering and bidi-display-reordering.
 224
 225         * dispextern.h (BIDI_MAXLEVEL): New macro.
 226         (bidi_type_t, bidi_dir_t): New types.
 227         (bidi_saved_info, bidi_stack, bidi_it): New structs.
 228         (struct it): New members bidi_p and bidi_it.
 229         (bidi_init_it): Extern it.
 230         (bidi_get_next_char_visually): Extern it.
 231
 232         * dispnew.c (direct_output_forward_char): Give up if we need bidi
 233         processing or buffer's direction is right-to-left.
 234
 235         * xdisp.c (init_iterator): Initialize it->bidi_p.
 236         (reseat_1): Cal bidi_init_it and bidi_get_next_char_visually if
 237         necessary.
 238         (set_iterator_to_next): Cal bidi_get_next_char_visually if
 239         necessary.
 240
 241
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