update.

[chise/xemacs-chise.git.1] / src / extents.c

diff --git a/src/extents.c b/src/extents.c
index 95a059b..5bc0dc4 100644 (file)
--- a/src/extents.c
+++ b/src/extents.c
@@ -2753,9 +2753,10 @@ invisible_ellipsis_p (REGISTER Lisp_Object propval, Lisp_Object list)
 
 face_index
 extent_fragment_update (struct window *w, struct extent_fragment *ef,
-                       Bytind pos)
+                       Bytind pos, Lisp_Object last_glyph)
 {
   int i;
+  int seen_glyph = NILP (last_glyph) ? 1 : 0;
   Extent_List *sel =
     buffer_or_string_stack_of_extents_force (ef->object)->extents;
   EXTENT lhe = 0;
@@ -2796,11 +2797,15 @@ extent_fragment_update (struct window *w, struct extent_fragment *ef,
       if (extent_start (e) == mempos && !NILP (extent_begin_glyph (e)))
        {
          Lisp_Object glyph = extent_begin_glyph (e);
-         struct glyph_block gb;
-
-         gb.glyph = glyph;
-         XSETEXTENT (gb.extent, e);
-         Dynarr_add (ef->begin_glyphs, gb);
+         if (seen_glyph) {
+           struct glyph_block gb;
+           
+           gb.glyph = glyph;
+           XSETEXTENT (gb.extent, e);
+           Dynarr_add (ef->begin_glyphs, gb);
+         }
+         else if (EQ (glyph, last_glyph))
+           seen_glyph = 1;
        }
     }
 
@@ -2811,11 +2816,15 @@ extent_fragment_update (struct window *w, struct extent_fragment *ef,
       if (extent_end (e) == mempos && !NILP (extent_end_glyph (e)))
        {
          Lisp_Object glyph = extent_end_glyph (e);
-         struct glyph_block gb;
+         if (seen_glyph) {
+           struct glyph_block gb;
 
-         gb.glyph = glyph;
-         XSETEXTENT (gb.extent, e);
-         Dynarr_add (ef->end_glyphs, gb);
+           gb.glyph = glyph;
+           XSETEXTENT (gb.extent, e);
+           Dynarr_add (ef->end_glyphs, gb);
+         }
+         else if (EQ (glyph, last_glyph))
+           seen_glyph = 1;
        }
     }
 
@@ -2951,8 +2960,8 @@ print_extent_1 (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
     strcpy (bp, "detached");
   else
     sprintf (bp, "%ld, %ld",
-            (long) XINT (Fextent_start_position (obj)),
-            (long) XINT (Fextent_end_position (obj)));
+            XINT (Fextent_start_position (obj)),
+            XINT (Fextent_end_position (obj)));
   bp += strlen (bp);
   *bp++ = (extent_end_open_p (anc) ? ')': ']');
   if (!NILP (extent_end_glyph (anc))) *bp++ = '*';
@@ -3843,6 +3852,7 @@ See documentation on `detach-extent' for a discussion of undo recording.
   get_buffer_or_string_range_byte (buffer_or_string, start, end, &s, &e,
                                   GB_ALLOW_PAST_ACCESSIBLE);
 
+  buffer_or_string_extent_info_force (buffer_or_string);
   set_extent_endpoints (ext, s, e, buffer_or_string);
   return extent;
 }
@@ -4574,27 +4584,36 @@ process_extents_for_insertion_mapper (EXTENT extent, void *arg)
 #endif
 
   /* The extent-adjustment code adjusted the extent's endpoints as if
-     they were markers -- endpoints at the gap (i.e. the insertion
-     point) go to the left of the insertion point, which is correct
-     for [) extents.  We need to fix the other kinds of extents.
+     all extents were closed-open -- endpoints at the insertion point
+     remain unchanged.  We need to fix the other kinds of extents:
+
+     1. Start position of start-open extents needs to be moved.
 
-     Note that both conditions below will hold for zero-length (]
-     extents at the gap.  Zero-length () extents would get adjusted
-     such that their start is greater than their end; we treat them
-     as [) extents.  This is unfortunately an inelegant part of the
-     extent model, but there is no way around it. */
+     2. End position of end-closed extents needs to be moved.
+
+     Note that both conditions hold for zero-length (] extents at the
+     insertion point.  But under these rules, zero-length () extents
+     would get adjusted such that their start is greater than their
+     end; instead of allowing that, we treat them as [) extents by
+     modifying condition #1 to not fire nothing when dealing with a
+     zero-length open-open extent.
+
+     Existence of zero-length open-open extents is unfortunately an
+     inelegant part of the extent model, but there is no way around
+     it. */
 
   {
-    Memind new_start, new_end;
+    Memind new_start = extent_start (extent);
+    Memind new_end   = extent_end (extent);
 
-    new_start = extent_start (extent);
-    new_end = extent_end (extent);
-    if (indice == extent_start (extent) && extent_start_open_p (extent) &&
-       /* coerce zero-length () extents to [) */
-       new_start != new_end)
+    if (indice == extent_start (extent) && extent_start_open_p (extent)
+       /* zero-length () extents are exempt; see comment above. */
+       && !(new_start == new_end && extent_end_open_p (extent))
+       )
       new_start += closure->length;
     if (indice == extent_end (extent) && !extent_end_open_p (extent))
       new_end += closure->length;
+
     set_extent_endpoints_1 (extent, new_start, new_end);
   }
 
@@ -5332,7 +5351,14 @@ The following symbols have predefined meanings:
                     `inside-margin', or `outside-margin') of the extent's
                     begin glyph.
 
- end-glyph-layout The layout policy of the extent's end glyph.
+ end-glyph-layout   The layout policy of the extent's end glyph.
+
+ syntax-table       A cons or a syntax table object.  If a cons, the car must
+                    be an integer (interpreted as a syntax code, applicable to
+                   all characters in the extent).  Otherwise, syntax of
+                   characters in the extent is looked up in the syntax table.
+                   You should use the text property API to manipulate this
+                   property.  (This may be required in the future.)
 */
        (extent, property, value))
 {