diff options
Diffstat (limited to 'tex/context/base/node-res.lua')
| -rw-r--r-- | tex/context/base/node-res.lua | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/tex/context/base/node-res.lua b/tex/context/base/node-res.lua index debb261e9..1a9d6f02e 100644 --- a/tex/context/base/node-res.lua +++ b/tex/context/base/node-res.lua @@ -257,6 +257,19 @@ function nutpool.glue(width,stretch,shrink,stretch_order,shrink_order) return someskip(glue,width,stretch,shrink,stretch_order,shrink_order) end +function nutpool.negatedglue(glue) + local n = copy_nut(glue) + local s = copy_nut(getfield(n,"spec")) + local width = getfield(s,"width") + local stretch = getfield(s,"stretch") + local shrink = getfield(s,"shrink") + if width then setfield(s,"width", -width) end + if stretch then setfield(s,"stretch",-stretch) end + if shrink then setfield(s,"shrink", -shrink) end + setfield(n,"spec",s) + return n +end + function nutpool.leftskip(width,stretch,shrink,stretch_order,shrink_order) return someskip(leftskip,width,stretch,shrink,stretch_order,shrink_order) end |