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if not modules then modules = { } end modules ['buff-ini'] = {
version = 1.001,
comment = "companion to buff-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local trace_parallel = false trackers.register("buffers.parallel", function(v) trace_parallel = v end)
local report_parallel = logs.reporter("buffers","parallel")
local insert, remove, find, gmatch = table.insert, table.remove, string.find, string.gmatch
local strip, format = string.strip, string.format
local variables = interfaces.variables
buffers.parallel = { } local parallel = buffers.parallel
local data = { }
function parallel.define(category,tags)
local tags = utilities.parsers.settings_to_array(tags)
local entries = { }
data[category] = {
tags = tags,
entries = entries,
}
for i=1,#tags do
entries[tags[i]] = {
lines = { },
number = 0,
}
end
end
function parallel.reset(category,tags)
if not tags or tags == "" or tags == variables.all then
tags = table.keys(entries)
else
tags = utilities.parsers.settings_to_array(tags)
end
for i=1,#tags do
entries[tags[i]] = {
lines = { },
number = 0,
}
end
end
function parallel.next(category)
local dc = data[category]
local tags = dc.tags
local entries = dc.entries
for i=1,#tags do
insert(entries[tags[i]].lines, { })
end
end
function parallel.save(category,tag,content)
local dc = data[category]
if not dc then
return
end
local entries = dc.entries[tag]
if not entries then
return
end
local lines = entries.lines
if not lines then
return
end
local line = lines[#lines]
if not line then
return
end
-- maybe no strip
-- use lpeg
if find(content,"^%s*%[") then
local done = false
for label, content in gmatch(content,"%s*%[(.-)%]%s*([^%[]+)") do
if done then
line = { }
insert(lines,line)
else
done = true
end
if trace_parallel and label ~= "" then
report_parallel("reference found: category '%s', tag '%s', label '%s'",category,tag,label)
end
line.label = label
line.content = strip(content)
end
else
line.content = strip(content)
line.label = ""
end
end
function parallel.hassomecontent(category,tags)
local dc = data[category]
if not dc then
return false
end
local entries = dc.entries
if not tags or tags == "" or tags == variables.all then
tags = table.keys(entries)
else
tags = utilities.parsers.settings_to_array(tags)
end
for t=1,#tags do
local tag = tags[t]
local lines = entries[tag].lines
for i=1,#lines do
local content = lines[i].content
if content and content ~= "" then
return true
end
end
end
return false
end
local save = resolvers.savers.byscheme
function parallel.place(category,tags,options)
local dc = data[category]
if not dc then
return
end
local entries = dc.entries
local tags = utilities.parsers.settings_to_array(tags)
local options = utilities.parsers.settings_to_hash(options)
local start, n, criterium = options.start, options.n, options.criterium
start, n = start and tonumber(start), n and tonumber(n)
local max = 1
if n then
max = n
elseif criterium == variables.all then
max = 0
for t=1,#tags do
local tag = tags[t]
local lines = entries[tag].lines
if #lines > max then
max = #lines
end
end
end
for i=1,max do
for t=1,#tags do
local tag = tags[t]
local entry = entries[tag]
if entry then
local lines = entry.lines
local number = entry.number + 1
entry.number = number
local line = remove(lines,1)
if line and line.content then
local content = format("\\input{%s}",save("virtual","parallel",line.content))
context.doflushparallel(tag,1,number,line.label,content)
else
context.doflushparallel(tag,0,number,"","")
end
end
end
end
end
-- interface
commands.defineparallel = parallel.define
commands.nextparallel = parallel.next
commands.saveparallel = parallel.save
commands.placeparallel = parallel.place
commands.resetparallel = parallel.reset
function commands.doifelseparallel(category,tags)
commands.testcase(parallel.hassomecontent(category,tags))
end
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