diff options
Diffstat (limited to 'tex/context/base/node-rul.lua')
| -rw-r--r-- | tex/context/base/node-rul.lua | 41 |
1 files changed, 22 insertions, 19 deletions
diff --git a/tex/context/base/node-rul.lua b/tex/context/base/node-rul.lua index f217c3a97..17b7c7658 100644 --- a/tex/context/base/node-rul.lua +++ b/tex/context/base/node-rul.lua @@ -13,26 +13,28 @@ local disc = node.id("disc") local rule = node.id("rule") function nodes.strip_range(first,last) -- todo: dir - local current = first - while current ~= last do - local id = current.id - if id == glyph or id == disc then ---~ if id == glyph or id == rule or id == disc then - first = current - break - else - current = current.next + if first and last then -- just to be sure + local current = first + while current and current ~= last do + local id = current.id + if id == glyph or id == disc then + --~ if id == glyph or id == rule or id == disc then + first = current + break + else + current = current.next + end end - end - local current = last - while current ~= first do - local id = current.id ---~ if id == glyph or id == rule or id == disc then - if id == glyph or id == disc then - last = current - break - else - current = current.prev + local current = last + while current and current ~= first do + local id = current.id + --~ if id == glyph or id == rule or id == disc then + if id == glyph or id == disc then + last = current + break + else + current = current.prev + end end end return first, last @@ -169,6 +171,7 @@ function nodes.rules.define(settings) end local function flush_ruled(head,f,l,d,level,parent,strip) -- not that fast but acceptable for this purpose +-- check for f and l local r, m if true then f, l = strip_range(f,l) |