Merge from mainline.

[gnu-emacs] / src / buffer.c

diff --git a/src/buffer.c b/src/buffer.c
index a0acad309af557c58fd40b49c55ae9d32e0612d4..0c6e57d45be9446ddc85712cbbd295006f8e329f 100644 (file)
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -2279,6 +2279,8 @@ DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text,
   swapfield (undo_list, Lisp_Object);
   swapfield (mark, Lisp_Object);
   swapfield (enable_multibyte_characters, Lisp_Object);
+  swapfield (bidi_display_reordering, Lisp_Object);
+  swapfield (bidi_paragraph_direction, Lisp_Object);
   /* FIXME: Not sure what we should do with these *_marker fields.
      Hopefully they're just nil anyway.  */
   swapfield (pt_marker, Lisp_Object);
@@ -5206,7 +5208,9 @@ init_buffer_once ()
   buffer_defaults.truncate_lines = Qnil;
   buffer_defaults.word_wrap = Qnil;
   buffer_defaults.ctl_arrow = Qt;
+  buffer_defaults.bidi_display_reordering = Qnil;
   buffer_defaults.direction_reversed = Qnil;
+  buffer_defaults.bidi_paragraph_direction = Qnil;
   buffer_defaults.cursor_type = Qt;
   buffer_defaults.extra_line_spacing = Qnil;
   buffer_defaults.cursor_in_non_selected_windows = Qt;
@@ -5291,7 +5295,9 @@ init_buffer_once ()
   XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx;
   XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx;
   XSETFASTINT (buffer_local_flags.category_table, idx); ++idx;
+  XSETFASTINT (buffer_local_flags.bidi_display_reordering, idx); ++idx;
   XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx;
+  XSETFASTINT (buffer_local_flags.bidi_paragraph_direction, idx); ++idx;
   XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx);
   /* Make this one a permanent local.  */
   buffer_permanent_local_flags[idx++] = 1;
@@ -5548,11 +5554,6 @@ This is the same as (default-value 'abbrev-mode).  */);
                     doc: /* Default value of `ctl-arrow' for buffers that do not override it.
 This is the same as (default-value 'ctl-arrow).  */);
 
-  DEFVAR_LISP_NOPRO ("default-direction-reversed",
-                     &buffer_defaults.direction_reversed,
-                     doc: /* Default value of `direction-reversed' for buffers that do not override it.
-This is the same as (default-value 'direction-reversed).  */);
-
   DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
                      &buffer_defaults.enable_multibyte_characters,
                      doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
@@ -5809,11 +5810,29 @@ The variable `coding-system-for-write', if non-nil, overrides this variable.
 
 This variable is never applied to a way of decoding a file while reading it.  */);
 
-  DEFVAR_PER_BUFFER ("direction-reversed", &current_buffer->direction_reversed,
-                    Qnil,
-                    doc: /* *Non-nil means lines in the buffer are displayed right to left.  */);
-
-  DEFVAR_PER_BUFFER ("truncate-lines", &current_buffer->truncate_lines, Qnil,
+  DEFVAR_PER_BUFFER ("direction-reversed",
+                    &current_buffer->direction_reversed, Qnil,
+                    doc: /* Non-nil means set beginning of lines at the right edge of the window.
+See also the variable `bidi-display-reordering'.  */);
+
+  DEFVAR_PER_BUFFER ("bidi-display-reordering",
+                    &current_buffer->bidi_display_reordering, Qnil,
+                    doc: /* Non-nil means reorder bidirectional text for display in the visual order.
+See also the variable `direction-reversed'.  */);
+
+  DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
+                    &current_buffer->bidi_paragraph_direction, Qnil,
+                    doc: /* *If non-nil, forces directionality of text paragraphs in the buffer.
+                            
+If this is nil (the default), the direction of each paragraph is
+determined by the first strong directional character of its text.
+The values of `right-to-left' and `left-to-right' override that.
+Any other value is treated as nil.
+                            
+This variable has no effect unless the buffer's value of
+\`bidi-display-reordering' is non-nil.  */);
+
+ DEFVAR_PER_BUFFER ("truncate-lines", &current_buffer->truncate_lines, Qnil,
                     doc: /* *Non-nil means do not display continuation lines.
 Instead, give each line of text just one screen line.