Use character position for ranges in treesit_sync_visible_region

* src/treesit.c (treesit_sync_visible_region): Use character position
instead of byte position when comparing to ranges, because the
ranges are in character position.

(cherry picked from commit 2dbf7d0b1b26a9676fbdb56a5955f3f24f521cc4)

diff --git a/src/treesit.c b/src/treesit.c
index 20c3626732ac466e7363896af3023870ca1e4b96..585be9efe290d16fb3daeed23dcddaaaced82415 100644 (file)
--- a/src/treesit.c
+++ b/src/treesit.c
@@ -1129,12 +1129,12 @@ treesit_sync_visible_region (Lisp_Object parser)
     ptrdiff_t beg = XFIXNUM (XCAR (range));
     ptrdiff_t end = XFIXNUM (XCDR (range));
 
-    if (end <= visible_beg)
-      /* Even the end is before visible_beg, discard this range.  */
+    if (end <= BUF_BEGV (buffer))
+      /* Even the end is before BUF_BEGV (buffer), discard this range.  */
       new_ranges_head = XCDR (new_ranges_head);
-    else if (beg >= visible_end)
+    else if (beg >= BUF_ZV (buffer))
       {
-       /* Even the beg is after visible_end, discard this range and all
+       /* Even the beg is after BUF_ZV (buffer), discard this range and all
            the ranges after it.  */
        if (NILP (prev_cons))
          new_ranges_head = Qnil;
@@ -1147,10 +1147,10 @@ treesit_sync_visible_region (Lisp_Object parser)
        /* At this point, the range overlaps with the visible portion of
           the buffer in some way (in front / in back / completely
           encased / completely encases).  */
-       if (beg < visible_beg)
-         XSETCAR (range, make_fixnum (visible_beg));
-       if (end > visible_end)
-         XSETCDR (range, make_fixnum (visible_end));
+       if (beg < BUF_BEGV (buffer))
+         XSETCAR (range, make_fixnum (BUF_BEGV (buffer)));
+       if (end > BUF_ZV (buffer))
+         XSETCDR (range, make_fixnum (BUF_ZV (buffer)));
       }
     prev_cons = lisp_ranges;
   }
@@ -1160,8 +1160,8 @@ treesit_sync_visible_region (Lisp_Object parser)
      options, so just throw the towel: just give the parser a zero
      range.  (Perfect filling!!)   */
   if (NILP (new_ranges_head))
-    new_ranges_head = Fcons (Fcons (make_fixnum (visible_beg),
-                                   make_fixnum (visible_beg)),
+    new_ranges_head = Fcons (Fcons (make_fixnum (BUF_BEGV (buffer)),
+                                   make_fixnum (BUF_BEGV (buffer))),
                             Qnil);
 
   XTS_PARSER (parser)->last_set_ranges = new_ranges_head;