[Emacs-diffs] Changes to emacs/src/xdisp.c,v [EMACS_22_BASE]

[Richard M. Stallman]

CVSROOT:        /cvsroot/emacs
Module name:    emacs
Branch:         EMACS_22_BASE
Changes by:     Richard M. Stallman <rms>       07/11/04 07:42:22

Index: xdisp.c
===================================================================
RCS file: /cvsroot/emacs/emacs/src/xdisp.c,v
retrieving revision 1.1149.2.15
retrieving revision 1.1149.2.16
diff -u -b -r1.1149.2.15 -r1.1149.2.16
--- xdisp.c     3 Nov 2007 03:47:42 -0000       1.1149.2.15
+++ xdisp.c     4 Nov 2007 07:42:21 -0000       1.1149.2.16
@@ -967,8 +967,8 @@
 static int face_before_or_after_it_pos P_ ((struct it *, int));
 static int next_overlay_change P_ ((int));
 static int handle_single_display_spec P_ ((struct it *, Lisp_Object,
-                                          Lisp_Object, struct text_pos *,
-                                          int));
+                                          Lisp_Object, Lisp_Object,
+                                          struct text_pos *, int));
 static int underlying_face_id P_ ((struct it *));
 static int in_ellipses_for_invisible_text_p P_ ((struct display_pos *,
                                                 struct window *));
@@ -3365,21 +3365,46 @@
   else
     {
       int base_face_id, bufpos;
+      int i;
+      Lisp_Object from_overlay
+       = (it->current.overlay_string_index >= 0
+          ? it->string_overlays[it->current.overlay_string_index]
+          : from_overlay);
 
-      if (it->current.overlay_string_index >= 0)
+      /* See we got to this string directly or indirectly from
+        an overlay property.  That includes the before-string or
+        after-string of an overlay, strings in display properties
+        provided by an overlay, their text properties, etc.
+
+        FROM_OVERLAY is the overlay that brought us here, or nil if none.  */
+      if (! NILP (from_overlay))
+       for (i = it->sp - 1; i >= 0; i--)
+         {
+           if (it->stack[i].current.overlay_string_index >= 0)
+             from_overlay
+               = 
it->string_overlays[it->stack[i].current.overlay_string_index];
+           else if (! NILP (it->stack[i].from_overlay))
+             from_overlay = it->stack[i].from_overlay;
+
+           if (!NILP (from_overlay))
+             break;
+         }
+
+      if (! NILP (from_overlay))
        {
          bufpos = IT_CHARPOS (*it);
-         /* For an overlay face, the base face depends
+         /* For a string from an overlay, the base face depends
             only on text properties and ignores overlays.  */
          base_face_id
-           = face_at_buffer_position_no_overlays (it->w,
+           = face_for_overlay_string (it->w,
                                                   IT_CHARPOS (*it),
                                                   it->region_beg_charpos,
                                                   it->region_end_charpos,
                                                   &next_stop,
                                                   (IT_CHARPOS (*it)
                                                    + TEXT_PROP_DISTANCE_LIMIT),
-                                                  0);
+                                      0,
+                                      from_overlay);
        }
       else
        {
@@ -3801,7 +3826,7 @@
 handle_display_prop (it)
      struct it *it;
 {
-  Lisp_Object prop, object;
+  Lisp_Object prop, object, overlay;
   struct text_pos *position;
   /* Nonzero if some property replaces the display of the text itself.  */
   int display_replaced_p = 0;
@@ -3829,10 +3854,12 @@
   if (!it->string_from_display_prop_p)
     it->area = TEXT_AREA;
 
-  prop = Fget_char_property (make_number (position->charpos),
-                            Qdisplay, object);
+  prop = get_char_property_and_overlay (make_number (position->charpos),
+                                       Qdisplay, object, &overlay);
   if (NILP (prop))
     return HANDLED_NORMALLY;
+  /* Now OVERLAY is the overlay that gave us this property, or nil
+     if it was a text property.  */
 
   if (!STRINGP (it->string))
     object = it->w->buffer;
@@ -3854,7 +3881,7 @@
     {
       for (; CONSP (prop); prop = XCDR (prop))
        {
-         if (handle_single_display_spec (it, XCAR (prop), object,
+         if (handle_single_display_spec (it, XCAR (prop), object, overlay,
                                          position, display_replaced_p))
            {
              display_replaced_p = 1;
@@ -3869,7 +3896,7 @@
     {
       int i;
       for (i = 0; i < ASIZE (prop); ++i)
-       if (handle_single_display_spec (it, AREF (prop, i), object,
+       if (handle_single_display_spec (it, AREF (prop, i), object, overlay,
                                        position, display_replaced_p))
          {
            display_replaced_p = 1;
@@ -3881,7 +3908,8 @@
     }
   else
     {
-      int ret = handle_single_display_spec (it, prop, object, position, 0);
+      int ret = handle_single_display_spec (it, prop, object, overlay,
+                                           position, 0);
       if (ret < 0)  /* Replaced by "", i.e. nothing. */
        return HANDLED_RECOMPUTE_PROPS;
       if (ret)
@@ -3923,6 +3951,9 @@
    replaced text display with something else, for example an image;
    we ignore such properties after the first one has been processed.
 
+   OVERLAY is the overlay this `display' property came from,
+   or nil if it was a text property.
+
    If PROP is a `space' or `image' specification, and in some other
    cases too, set *POSITION to the position where the `display'
    property ends.
@@ -3932,11 +3963,12 @@
    "something" is "nothing". */
 
 static int
-handle_single_display_spec (it, spec, object, position,
+handle_single_display_spec (it, spec, object, overlay, position,
                            display_replaced_before_p)
      struct it *it;
      Lisp_Object spec;
      Lisp_Object object;
+     Lisp_Object overlay;
      struct text_pos *position;
      int display_replaced_before_p;
 {
@@ -4046,7 +4078,7 @@
       return 0;
     }
 
-  /* Handle `(space_width WIDTH)'.  */
+  /* Handle `(space-width WIDTH)'.  */
   if (CONSP (spec)
       && EQ (XCAR (spec), Qspace_width)
       && CONSP (XCDR (spec)))
@@ -4170,6 +4202,7 @@
       it->position = start_pos;
       it->object = NILP (object) ? it->w->buffer : object;
       it->method = GET_FROM_IMAGE;
+      it->from_overlay = Qnil;
       it->face_id = face_id;
 
       /* Say that we haven't consumed the characters with
@@ -4240,6 +4273,7 @@
       it->position = *position;
       push_it (it);
       it->position = save_pos;
+      it->from_overlay = overlay;
 
       if (NILP (location))
        it->area = TEXT_AREA;
@@ -4883,7 +4917,10 @@
   i = 0;
   j = it->current.overlay_string_index;
   while (i < OVERLAY_STRING_CHUNK_SIZE && j < n)
+    {
     it->overlay_strings[i++] = entries[j++].string;
+      it->string_overlays[i++] = entries[j++].overlay;
+    }
 
   CHECK_IT (it);
 }
@@ -4929,6 +4966,7 @@
         string.  */
       IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0;
       it->string = it->overlay_strings[0];
+      it->from_overlay = Qnil;
       it->stop_charpos = 0;
       xassert (STRINGP (it->string));
       it->end_charpos = SCHARS (it->string);
@@ -4982,6 +5020,7 @@
   p->face_id = it->face_id;
   p->string = it->string;
   p->method = it->method;
+  p->from_overlay = it->from_overlay;
   switch (p->method)
     {
     case GET_FROM_IMAGE:
@@ -5035,6 +5074,7 @@
   it->current = p->current;
   it->position = p->position;
   it->string = p->string;
+  it->from_overlay = p->from_overlay;
   if (NILP (it->string))
     SET_TEXT_POS (it->current.string_pos, -1, -1);
   it->method = p->method;