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More reliable leader shipout

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This commit is contained in:
Marcel Krüger 2020-08-19 09:25:07 +02:00
parent 3c2fba9a9f
commit 15860db8b5
1 changed files with 13 additions and 5 deletions
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18
luametalatex-nodewriter.lua
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@ -414,9 +414,17 @@ function nodehandler.disc(p, n, x, y, list, ...)
x = w + x x = w + x
end end
end end
local gluesubtypes = {}
for i, n in next, node.subtypes'glue' do
gluesubtypes[n] = i
end
local leaders_glue = gluesubtypes.leaders
local cleaders_glue = gluesubtypes.cleaders
local xleaders_glue = gluesubtypes.xleaders
local gleaders_glue = gluesubtypes.gleaders
function nodehandler.glue(p, n, x, y, outer, origin, level) -- Naturally this is an interesting one. function nodehandler.glue(p, n, x, y, outer, origin, level) -- Naturally this is an interesting one.
local subtype = getsubtype(n) local subtype = getsubtype(n)
if subtype < 100 then return end -- We only really care about leaders if subtype < leaders_glue then return end -- We only really care about leaders
local leader = getleader(n) local leader = getleader(n)
local w = direct.effective_glue(n, outer) local w = direct.effective_glue(n, outer)
if getid(leader) == 2 then -- We got a rule, this should be easy if getid(leader) == 2 then -- We got a rule, this should be easy
@ -432,7 +440,7 @@ function nodehandler.glue(p, n, x, y, outer, origin, level) -- Naturally this is
if getid(outer) ~= 0 then if getid(outer) ~= 0 then
y = y + w y = y + w
end end
if subtype == 100 then if subtype == leaders_glue then
if getid(outer) == 0 then if getid(outer) == 0 then
local newx = ((x-origin - 1)//lwidth + 1) * lwidth + origin local newx = ((x-origin - 1)//lwidth + 1) * lwidth + origin
-- local newx = -(origin-x)//lwidth * lwidth + origin -- local newx = -(origin-x)//lwidth * lwidth + origin
@ -444,14 +452,14 @@ function nodehandler.glue(p, n, x, y, outer, origin, level) -- Naturally this is
w = w + newy - y w = w + newy - y
y = newy y = newy
end end
elseif subtype == 101 then elseif subtype == cleaders_glue then
local inner = w - (w // lwidth) * lwidth local inner = w - (w // lwidth) * lwidth
if getid(outer) == 0 then if getid(outer) == 0 then
x = x + inner/2 x = x + inner/2
else else
y = y - inner/2 y = y - inner/2
end end
elseif subtype == 102 then elseif subtype == xleaders_glue then
local count = w // lwidth local count = w // lwidth
local skip = (w - count * lwidth) / (count + 1) local skip = (w - count * lwidth) / (count + 1)
if getid(outer) == 0 then if getid(outer) == 0 then
@ -460,7 +468,7 @@ function nodehandler.glue(p, n, x, y, outer, origin, level) -- Naturally this is
y = y - skip y = y - skip
end end
lwidth = lwidth + skip lwidth = lwidth + skip
elseif subtype == 103 then elseif subtype == gleaders_glue then
if getid(outer) == 0 then if getid(outer) == 0 then
local newx = ((x - 1)//lwidth + 1) * lwidth local newx = ((x - 1)//lwidth + 1) * lwidth
w = w + x - newx w = w + x - newx