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if not modules then modules = { } end modules ['pack-rul'] = {
version = 1.001,
comment = "companion to pack-rul.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
--[[ldx--
<p>An explanation is given in the history document <t>mk</t>.</p>
--ldx]]--
local texsetdimen, texsetcount, texbox = tex.setdimen, tex.setcount, tex.box
local hpack, free, copy, traverse_id = node.hpack, node.free, node.copy_list, node.traverse_id
local texdimen, texcount = tex.dimen, tex.count
-- fastrepack
function commands.doreshapeframedbox(n)
local box, noflines, firstheight, lastdepth, lastlinelength = texbox[n], 0, nil, nil, 0
if box.width ~= 0 then
local list = box.list
if list then
local width, done = 0, false
for h in traverse_id('hlist',list) do -- no dir etc needed
if not firstheight then
firstheight = h.height
end
lastdepth = h.depth
local l = h.list
if l then
done = true
local p = hpack(copy(l))
lastlinelength = p.width
if lastlinelength > width then
width = lastlinelength
end
free(p)
end
end
if done then
if width ~= 0 then
for h in traverse_id('hlist',list) do
local l = h.list
if l then
-- if h.width ~= width then -- else no display math handling (uses shift)
h.list = hpack(l,width,'exactly',h.dir)
h.shift = 0 -- needed for display math
h.width = width
-- end
end
end
end
box.width = width
end
end
end
--~ print("reshape", noflines, firstheight or 0, lastdepth or 0)
texsetcount("global","framednoflines", noflines)
texsetdimen("global","framedfirstheight", firstheight or 0)
texsetdimen("global","framedlastdepth", lastdepth or 0)
end
function commands.doanalyzeframedbox(n)
local box, noflines, firstheight, lastdepth = texbox[n], 0, nil, nil
if box.width ~= 0 then
local list = box.list
if list then
for h in traverse_id('hlist',list) do
if not firstheight then
firstheight = h.height
end
lastdepth = h.depth
noflines = noflines + 1
end
end
end
--~ print("analyze", noflines, firstheight or 0, lastdepth or 0)
texsetcount("global","framednoflines", noflines)
texsetdimen("global","framedfirstheight", firstheight or 0)
texsetdimen("global","framedlastdepth", lastdepth or 0)
end
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