merge trunk

1 files changed, 24 insertions, 16 deletions

diff --git a/src/dispextern.h b/src/dispextern.h
index a68bc3e9899..f0d14c0e487 100644
--- a/src/dispextern.h
+++ b/src/dispextern.h
@@ -748,21 +748,29 @@ struct glyph_row
 
   /* First position in this row.  This is the text position, including
      overlay position information etc, where the display of this row
-     started, and can thus be less the position of the first glyph
-     (e.g. due to invisible text or horizontal scrolling).  BIDI Note:
-     This is the smallest character position in the row, but not
-     necessarily the character that is the leftmost on the display.  */
+     started, and can thus be less than the position of the first
+     glyph (e.g. due to invisible text or horizontal scrolling).
+     BIDI Note: In R2L rows, that have its reversed_p flag set, this
+     position is at or beyond the right edge of the row.  */
   struct display_pos start;
 
   /* Text position at the end of this row.  This is the position after
      the last glyph on this row.  It can be greater than the last
-     glyph position + 1, due to truncation, invisible text etc.  In an
-     up-to-date display, this should always be equal to the start
-     position of the next row.  BIDI Note: this is the character whose
-     buffer position is the largest, but not necessarily the rightmost
-     one on the display.  */
+     glyph position + 1, due to a newline that ends the line,
+     truncation, invisible text etc.  In an up-to-date display, this
+     should always be equal to the start position of the next row.
+     BIDI Note: In R2L rows, this position is at or beyond the left
+     edge of the row.  */
   struct display_pos end;
 
+  /* The smallest and the largest buffer positions that contributed to
+     glyphs in this row.  Note that due to bidi reordering, these are
+     in general different from the text positions stored in `start'
+     and `end' members above, and also different from the buffer
+     positions recorded in the glyphs displayed the leftmost and
+     rightmost on the screen.  */
+  struct text_pos minpos, maxpos;
+
   /* Non-zero means the overlay arrow bitmap is on this line.
      -1 means use default overlay arrow bitmap, else
      it specifies actual fringe bitmap number.  */
@@ -947,16 +955,16 @@ struct glyph_row *matrix_row P_ ((struct glyph_matrix *, int));
    displayed by ROW, which is not necessarily the smallest horizontal
    position.  */
 
-#define MATRIX_ROW_START_CHARPOS(ROW) ((ROW)->start.pos.charpos)
-#define MATRIX_ROW_START_BYTEPOS(ROW) ((ROW)->start.pos.bytepos)
+#define MATRIX_ROW_START_CHARPOS(ROW) ((ROW)->minpos.charpos)
+#define MATRIX_ROW_START_BYTEPOS(ROW) ((ROW)->minpos.bytepos)
 
 /* Return the character/ byte position at which ROW ends.  BIDI Note:
    this is the largest character/byte position among characters in
    ROW, i.e. the last logical-order character displayed by ROW, which
    is not necessarily the largest horizontal position.  */
 
-#define MATRIX_ROW_END_CHARPOS(ROW) ((ROW)->end.pos.charpos)
-#define MATRIX_ROW_END_BYTEPOS(ROW) ((ROW)->end.pos.bytepos)
+#define MATRIX_ROW_END_CHARPOS(ROW) ((ROW)->maxpos.charpos)
+#define MATRIX_ROW_END_BYTEPOS(ROW) ((ROW)->maxpos.bytepos)
 
 /* Return the vertical position of ROW in MATRIX.  */
 
@@ -1789,7 +1797,7 @@ struct bidi_it {
   EMACS_INT next_en_pos;        /* position of next EN char for ET */
   EMACS_INT ignore_bn_limit;    /* position until which to ignore BNs */
   bidi_dir_t sor;               /* direction of start-of-run in effect */
-  int scan_dir;                 /* direction of text scan */
+  int scan_dir;                 /* direction of text scan, 1: forw, -1: back */
   int stack_idx;                /* index of current data on the stack */
   /* Note: Everything from here on is not copied/saved when the bidi
      iterator state is saved, pushed, or popped.  So only put here
@@ -2913,8 +2921,8 @@ void mark_window_display_accurate P_ ((Lisp_Object, int));
 void redisplay_preserve_echo_area P_ ((int));
 int set_cursor_from_row P_ ((struct window *, struct glyph_row *,
                              struct glyph_matrix *, int, int, int, int));
-void init_iterator P_ ((struct it *, struct window *, int,
-                        int, struct glyph_row *, enum face_id));
+void init_iterator P_ ((struct it *, struct window *, EMACS_INT,
+                        EMACS_INT, struct glyph_row *, enum face_id));
 void init_iterator_to_row_start P_ ((struct it *, struct window *,
                                      struct glyph_row *));
 int get_next_display_element P_ ((struct it *));