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if not modules then modules = { } end modules ['lxml-sor'] = {
version = 1.001,
comment = "companion to lxml-sor.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local format, concat, rep = string.format, table.concat, string.rep
local lpegmatch = lpeg.match
local xml, lxml = xml, lxml
lxml.sorters = lxml.sorters or { }
if not lxml.splitid then
local splitter = lpeg.C((1-lpeg.P(":"))^1) * lpeg.P("::") * lpeg.C(lpeg.P(1)^1)
function lxml.splitid(id)
local d, i = lpegmatch(splitter,id)
if d then
return d, i
else
return "", id
end
end
end
local lists = { }
function lxml.sorters.reset(name)
lists[name] = {
sorted = false,
entries = { },
reverse = { },
results = { },
}
end
function lxml.sorters.add(name,n,key)
local list = lists[name]
if list.sorted then
-- reverse is messed up, we could regenerate it and go on
else
local entries = list and list.entries
if entries then
local reverse = list.reverse
local e = reverse[n]
if e then
local keys = entries[e][2]
keys[#keys+1] = key
else
entries[#entries+1] = { n, { key } }
reverse[n] = #entries
end
end
end
end
function lxml.sorters.show(name)
local list = lists[name]
local entries = list and list.entries
local NC, NR, bold = context.NC, context.NR, context.bold -- somehow bold is not working
if entries then
local maxn = 1
for i=1,#entries do
if #entries[i][2] > maxn then maxn = #entries[i][2] end
end
context.starttabulate { "|Tr|Tr|" .. rep("Tlp|",maxn) }
NC() bold("n")
NC() bold("id")
if maxn > 1 then
for i=1,maxn do
NC() bold("entry " .. i)
end
else
NC() bold("entry")
end
NC() NR()
context.HL()
for i=1,#entries do
local entry = entries[i]
local document, node = lxml.splitid(entry[1])
NC() context(i)
NC() context(node)
local e = entry[2]
for i=1,#e do
NC() context.detokenize(e[i])
end
NC() NR()
end
context.stoptabulate()
end
end
lxml.sorters.compare = sorters.comparers.basic -- (a,b)
function lxml.sorters.sort(name)
local list = lists[name]
local entries = list and list.entries
if entries then
-- filtering
local results = { }
list.results = results
for i=1,#entries do
local entry = entries[i]
results[i] = {
entry = entry[1],
key = concat(entry[2], " "),
}
end
-- preparation
local strip = sorters.strip
local splitter = sorters.splitters.utf
local firstofsplit = sorters.firstofsplit
for i=1, #results do
local r = results[i]
r.split = splitter(strip(r.key))
end
-- sorting
sorters.sort(results,lxml.sorters.compare)
-- finalizing
list.nofsorted = #results
local split = { }
for k=1,#results do -- rather generic so maybe we need a function
local v = results[k]
local entry, tag = firstofsplit(v)
local s = split[entry] -- keeps track of change
if not s then
s = { tag = tag, data = { } }
split[entry] = s
end
s.data[#s.data+1] = v
end
list.results = split
-- done
list.sorted = true
end
end
function lxml.sorters.flush(name,setup)
local list = lists[name]
local results = list and list.results
local xmlw = context.xmlw
if results and next(results) then
for key, result in next, results do
local tag, data = result.tag, result.data
for d=1,#data do
xmlw(setup,data[d].entry)
end
end
else
local entries = list and list.entries
if entries then
for i=1,#entries do
xmlw(setup,entries[i][1])
end
end
end
end
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