1 files changed, 36 insertions, 40 deletions

diff --git a/Master/texmf-dist/tex/context/base/mkiv/meta-imp-txt.mkiv b/Master/texmf-dist/tex/context/base/mkiv/meta-imp-txt.mkiv
index e9660b3a7e2..d4329cd6ffd 100644
--- a/Master/texmf-dist/tex/context/base/mkiv/meta-imp-txt.mkiv
+++ b/Master/texmf-dist/tex/context/base/mkiv/meta-imp-txt.mkiv
@@ -202,7 +202,10 @@
 \stopMPdefinitions
 
 \startluacode
+    local context   = context
+
     local nodecodes = nodes.nodecodes
+    local kerncodes = nodes.kerncodes
 
     local visible_code = {
         [nodecodes.glyph] = true,
@@ -212,72 +215,66 @@
         [nodecodes.rule]  = true,
     }
 
-    local disc_code = nodecodes.disc
-    local kern_code = nodecodes.kern
-
-    local c_userkern = nodes.kerncodes.userkern
+    local kern_code  = nodecodes.kern
+    local c_userkern = kerncodes.userkern
     local a_fontkern = attributes.private("fontkern")
 
+    local copynode = nodes.copy
+    local freenode = nodes.free
+
+    local topoints = number.topoints
+    local mpprint  = mp.print
+
     local n = nil
     local s = 0
 
     function mp.follow_reset()
-        r = nil
+        for i=1,#n do
+            freenode(n[i])
+        end
+        n = nil
         s = 0
     end
 
     function mp.follow_initialize(b)
-        if not r then
-            local l = tex.takebox(b).list
-            n = { }
-            s = 0
-            while l do
-                local c = l
-                l = l.next
-                local id = c.id
-                if visible_code[id] then
-                    s = s + 1
-                    n[s] = c
-                    c.prev = nil
-                    c.next = nil
-                elseif id == kern_code then
-                    if c.subtype == c_userkern and not c[a_fontkern] then
+        if not n then
+            local head = tex.takebox(b).list
+            if head then
+                n = { }
+                s = 0
+                head = node.flatten_discretionaries(head)
+                local current = head
+                while current do
+                    local id = current.id
+                    if visible_code[id] then
                         s = s + 1
-                        n[s] = c
-                        c.prev = nil
-                    else
-                        n[s].next = c
-                        c.prev = n[s]
-                    end
-                    c.next = nil
-                elseif id == disc_code then
-                    local r = c.replace
-                    while r do
+                        head, current, n[s] = nodes.remove(head,current)
+                    elseif id == kern_code and current.subtype == c_userkern and not current[a_fontkern] then
                         s = s + 1
-                        n[s] = r
-                        r = r.next
-                        r.prev = nil
-                        r.next = nil
+                        head, current, n[s] = nodes.remove(head,current)
+                    else
+                        current = current.next
                     end
                 end
+                nodes.flush_list(head)
             end
         end
     end
 
     function mp.follow_size()
-        mp.print(s)
+        mpprint(s)
     end
 
     function mp.follow_slot(i)
-        mp.print('textext("\\getfollowtoken{' .. i .. '}")')
+        mpprint('textext("\\getfollowtoken{' .. i .. '}")')
     end
 
     function mp.follow_text(s)
-        context(n[s])
+        context(copynode(n[s]))
     end
 
     function mp.follow_width(i)
-        mp.print(number.topoints(n[i].width))
+        mpprint(topoints(n[i].width))
     end
 \stopluacode
 
@@ -373,9 +370,8 @@
   [medium]
 
 \startuniqueMPgraphic{EnglishRule}{height,width,color}
-    height = \MPvar{height} ;
     x1 = 0 ; x3 = \MPvar{width} ; x2 = x4 = .5x3 ;
-    y1 = y3 = 0 ; y2 = -y4 = height/2 ;
+    y1 = y3 = 0 ; y2 = -y4 = \MPvar{height}/2 ;
     fill z1..z2..z3 & z3..z4..z1 & cycle withcolor \MPvar{color} ;
 \stopuniqueMPgraphic