Fix bug #14575 with window-specific overlays with display props.

 src/bidi.c (bidi_fetch_char): Accept additional argument, the window
 being displayed, and pass it to compute_display_string_pos.
 (bidi_level_of_next_char, bidi_resolve_explicit_1)
 (bidi_paragraph_init): All callers changed.
 src/xdisp.c (init_from_display_pos, init_iterator)
 (handle_single_display_spec, next_overlay_string)
 (get_overlay_strings_1, reseat_1, reseat_to_string)
 (push_prefix_prop, Fcurrent_bidi_paragraph_direction): Set
 bidi_it.w member from it->w.
 (compute_display_string_pos): Accept additional argument, the
 window being displayed, and pass it to Fget_char_property.
 src/dispextern.h (struct bidi_it): New member w, the window being
 displayed.
 (compute_display_string_pos): Adjust prototype.

4 files changed, 54 insertions, 10 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 629f90678e6..cf5a8c0ee1e 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,23 @@
+2013-06-08  Eli Zaretskii  <eliz@gnu.org>
+
+        * bidi.c (bidi_fetch_char): Accept additional argument, the window
+        being displayed, and pass it to compute_display_string_pos.
+        (bidi_level_of_next_char, bidi_resolve_explicit_1)
+        (bidi_paragraph_init): All callers changed.
+
+        * xdisp.c (init_from_display_pos, init_iterator)
+        (handle_single_display_spec, next_overlay_string)
+        (get_overlay_strings_1, reseat_1, reseat_to_string)
+        (push_prefix_prop, Fcurrent_bidi_paragraph_direction): Set
+        bidi_it.w member from it->w.
+        (compute_display_string_pos): Accept additional argument, the
+        window being displayed, and pass it to Fget_char_property.
+        (Bug#14575)
+
+        * dispextern.h (struct bidi_it): New member w, the window being
+        displayed.
+        (compute_display_string_pos): Adjust prototype.
+
 2013-06-08  Jan Djärv  <jan.h.d@swipnet.se>
 
         * xgselect.c: Remove unneeded include xterm.h
diff --git a/src/bidi.c b/src/bidi.c
index c6bea62f67b..c31d208ecbc 100644
--- a/src/bidi.c
+++ b/src/bidi.c
@@ -927,6 +927,7 @@ bidi_char_at_pos (ptrdiff_t bytepos, const unsigned char *s, bool unibyte)
 static int
 bidi_fetch_char (ptrdiff_t charpos, ptrdiff_t bytepos, ptrdiff_t *disp_pos,
                  int *disp_prop, struct bidi_string_data *string,
+                 struct window *w,
                  bool frame_window_p, ptrdiff_t *ch_len, ptrdiff_t *nchars)
 {
   int ch;
@@ -940,7 +941,7 @@ bidi_fetch_char (ptrdiff_t charpos, ptrdiff_t bytepos, ptrdiff_t *disp_pos,
   if (charpos < endpos && charpos > *disp_pos)
     {
       SET_TEXT_POS (pos, charpos, bytepos);
-      *disp_pos = compute_display_string_pos (&pos, string, frame_window_p,
+      *disp_pos = compute_display_string_pos (&pos, string, w, frame_window_p,
                                               disp_prop);
     }
 
@@ -1045,7 +1046,7 @@ bidi_fetch_char (ptrdiff_t charpos, ptrdiff_t bytepos, ptrdiff_t *disp_pos,
       && *disp_prop)
     {
       SET_TEXT_POS (pos, charpos + *nchars, bytepos + *ch_len);
-      *disp_pos = compute_display_string_pos (&pos, string, frame_window_p,
+      *disp_pos = compute_display_string_pos (&pos, string, w, frame_window_p,
                                               disp_prop);
     }
 
@@ -1224,7 +1225,7 @@ bidi_paragraph_init (bidi_dir_t dir, struct bidi_it *bidi_it, bool no_default_p)
         if (!string_p)
           pos = BYTE_TO_CHAR (bytepos);
         ch = bidi_fetch_char (pos, bytepos, &disp_pos, &disp_prop,
-                              &bidi_it->string,
+                              &bidi_it->string, bidi_it->w,
                               bidi_it->frame_window_p, &ch_len, &nchars);
         type = bidi_get_type (ch, NEUTRAL_DIR);
 
@@ -1252,7 +1253,7 @@ bidi_paragraph_init (bidi_dir_t dir, struct bidi_it *bidi_it, bool no_default_p)
               break;
             /* Fetch next character and advance to get past it.  */
             ch = bidi_fetch_char (pos, bytepos, &disp_pos,
-                                  &disp_prop, &bidi_it->string,
+                                  &disp_prop, &bidi_it->string, bidi_it->w,
                                   bidi_it->frame_window_p, &ch_len, &nchars);
             pos += nchars;
             bytepos += ch_len;
@@ -1402,7 +1403,8 @@ bidi_resolve_explicit_1 (struct bidi_it *bidi_it)
          a single character u+FFFC.  */
       curchar = bidi_fetch_char (bidi_it->charpos, bidi_it->bytepos,
                                  &bidi_it->disp_pos, &bidi_it->disp_prop,
-                                 &bidi_it->string, bidi_it->frame_window_p,
+                                 &bidi_it->string, bidi_it->w,
+                                 bidi_it->frame_window_p,
                                  &bidi_it->ch_len, &bidi_it->nchars);
     }
   bidi_it->ch = curchar;
@@ -2194,7 +2196,7 @@ bidi_level_of_next_char (struct bidi_it *bidi_it)
         emacs_abort ();
       do {
         ch = bidi_fetch_char (cpos += nc, bpos += clen, &disp_pos, &dpp, &bs,
-                              fwp, &clen, &nc);
+                              bidi_it->w, fwp, &clen, &nc);
         if (ch == '\n' || ch == BIDI_EOB)
           chtype = NEUTRAL_B;
         else
diff --git a/src/dispextern.h b/src/dispextern.h
index 50a32ffaf8f..83e8792dfe0 100644
--- a/src/dispextern.h
+++ b/src/dispextern.h
@@ -1881,6 +1881,7 @@ struct bidi_it {
      stuff that is not part of the bidi iterator's state!  */
   struct bidi_stack level_stack[BIDI_MAXLEVEL]; /* stack of embedding levels */
   struct bidi_string_data string;       /* string to reorder */
+  struct window *w;             /* the window being displayed */
   bidi_dir_t paragraph_dir;     /* current paragraph direction */
   ptrdiff_t separator_limit;    /* where paragraph separator should end */
   unsigned prev_was_pdf : 1;    /* if non-zero, previous char was PDF */
@@ -3077,7 +3078,7 @@ extern void reseat_at_previous_visible_line_start (struct it *);
 extern Lisp_Object lookup_glyphless_char_display (int, struct it *);
 extern ptrdiff_t compute_display_string_pos (struct text_pos *,
                                              struct bidi_string_data *,
-                                             int, int *);
+                                             struct window *, int, int *);
 extern ptrdiff_t compute_display_string_end (ptrdiff_t,
                                              struct bidi_string_data *);
 extern void produce_stretch_glyph (struct it *);
diff --git a/src/xdisp.c b/src/xdisp.c
index 6e391350816..5ec72407191 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -2650,6 +2650,7 @@ init_iterator (struct it *it, struct window *w,
   it->bidi_it.string.lstring = Qnil;
   it->bidi_it.string.s = NULL;
   it->bidi_it.string.bufpos = 0;
+  it->bidi_it.w = w;
 
   /* The window in which we iterate over current_buffer:  */
   XSETWINDOW (it->window, w);
@@ -3124,6 +3125,7 @@ init_from_display_pos (struct it *it, struct window *w, struct display_pos *pos)
           it->bidi_it.string.bufpos = it->overlay_strings_charpos;
           it->bidi_it.string.from_disp_str = it->string_from_display_prop_p;
           it->bidi_it.string.unibyte = !it->multibyte_p;
+          it->bidi_it.w = it->w;
           bidi_init_it (IT_STRING_CHARPOS (*it), IT_STRING_BYTEPOS (*it),
                         FRAME_WINDOW_P (it->f), &it->bidi_it);
 
@@ -3490,11 +3492,11 @@ next_overlay_change (ptrdiff_t pos)
 ptrdiff_t
 compute_display_string_pos (struct text_pos *position,
                             struct bidi_string_data *string,
+                            struct window *w,
                             int frame_window_p, int *disp_prop)
 {
   /* OBJECT = nil means current buffer.  */
-  Lisp_Object object =
-    (string && STRINGP (string->lstring)) ? string->lstring : Qnil;
+  Lisp_Object object, object1;
   Lisp_Object pos, spec, limpos;
   int string_p = (string && (STRINGP (string->lstring) || string->s));
   ptrdiff_t eob = string_p ? string->schars : ZV;
@@ -3505,6 +3507,17 @@ compute_display_string_pos (struct text_pos *position,
   struct text_pos tpos;
   int rv = 0;
 
+  if (string && STRINGP (string->lstring))
+    object1 = object = string->lstring;
+  else if (!string_p)
+    {
+      eassert (w != NULL);
+      XSETWINDOW (object, w);
+      object1 = Qnil;
+    }
+  else
+    object1 = object = Qnil;
+
   *disp_prop = 1;
 
   if (charpos >= eob
@@ -3543,7 +3556,7 @@ compute_display_string_pos (struct text_pos *position,
      that will replace the underlying text when displayed.  */
   limpos = make_number (lim);
   do {
-    pos = Fnext_single_char_property_change (pos, Qdisplay, object, limpos);
+    pos = Fnext_single_char_property_change (pos, Qdisplay, object1, limpos);
     CHARPOS (tpos) = XFASTINT (pos);
     if (CHARPOS (tpos) >= lim)
       {
@@ -5031,6 +5044,7 @@ handle_single_display_spec (struct it *it, Lisp_Object spec, Lisp_Object object,
               it->bidi_it.string.bufpos = bufpos;
               it->bidi_it.string.from_disp_str = 1;
               it->bidi_it.string.unibyte = !it->multibyte_p;
+              it->bidi_it.w = it->w;
               bidi_init_it (0, 0, FRAME_WINDOW_P (it->f), &it->bidi_it);
             }
         }
@@ -5409,6 +5423,7 @@ next_overlay_string (struct it *it)
           it->bidi_it.string.bufpos = it->overlay_strings_charpos;
           it->bidi_it.string.from_disp_str = it->string_from_display_prop_p;
           it->bidi_it.string.unibyte = !it->multibyte_p;
+          it->bidi_it.w = it->w;
           bidi_init_it (0, 0, FRAME_WINDOW_P (it->f), &it->bidi_it);
         }
     }
@@ -5712,6 +5727,7 @@ get_overlay_strings_1 (struct it *it, ptrdiff_t charpos, int compute_stop_p)
           it->bidi_it.string.bufpos = pos;
           it->bidi_it.string.from_disp_str = it->string_from_display_prop_p;
           it->bidi_it.string.unibyte = !it->multibyte_p;
+          it->bidi_it.w = it->w;
           bidi_init_it (0, 0, FRAME_WINDOW_P (it->f), &it->bidi_it);
         }
       return 1;
@@ -6344,6 +6360,7 @@ reseat_1 (struct it *it, struct text_pos pos, int set_stop_p)
       it->bidi_it.string.lstring = Qnil;
       it->bidi_it.string.bufpos = 0;
       it->bidi_it.string.unibyte = 0;
+      it->bidi_it.w = it->w;
     }
 
   if (set_stop_p)
@@ -6421,6 +6438,7 @@ reseat_to_string (struct it *it, const char *s, Lisp_Object string,
           it->bidi_it.string.bufpos = 0;
           it->bidi_it.string.from_disp_str = 0;
           it->bidi_it.string.unibyte = !it->multibyte_p;
+          it->bidi_it.w = it->w;
           bidi_init_it (charpos, IT_STRING_BYTEPOS (*it),
                         FRAME_WINDOW_P (it->f), &it->bidi_it);
         }
@@ -6452,6 +6470,7 @@ reseat_to_string (struct it *it, const char *s, Lisp_Object string,
           it->bidi_it.string.bufpos = 0;
           it->bidi_it.string.from_disp_str = 0;
           it->bidi_it.string.unibyte = !it->multibyte_p;
+          it->bidi_it.w = it->w;
           bidi_init_it (charpos, IT_BYTEPOS (*it), FRAME_WINDOW_P (it->f),
                         &it->bidi_it);
         }
@@ -18921,6 +18940,7 @@ push_prefix_prop (struct it *it, Lisp_Object prop)
           it->bidi_it.string.bufpos = IT_CHARPOS (*it);
           it->bidi_it.string.from_disp_str = it->string_from_display_prop_p;
           it->bidi_it.string.unibyte = !it->multibyte_p;
+          it->bidi_it.w = it->w;
           bidi_init_it (0, 0, FRAME_WINDOW_P (it->f), &it->bidi_it);
         }
     }
@@ -19990,6 +20010,7 @@ See also `bidi-paragraph-direction'.  */)
       itb.string.lstring = Qnil;
       itb.string.bufpos = 0;
       itb.string.unibyte = 0;
+      itb.w = XWINDOW (selected_window);
       bidi_paragraph_init (NEUTRAL_DIR, &itb, 1);
       bidi_unshelve_cache (itb_data, 0);
       set_buffer_temp (old);