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if not modules then modules = { } end modules ['buff-par'] = {
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 tonumber = tonumber
local insert, remove, find, gmatch, match = table.insert, table.remove, string.find, string.gmatch, string.match
local fullstrip, formatters = string.fullstrip, string.formatters
local trace_parallel = false trackers.register("buffers.parallel", function(v) trace_parallel = v end)
local report_parallel = logs.reporter("buffers","parallel")
local variables = interfaces.variables
local v_all = variables.all
local parallel = buffers.parallel or { }
buffers.parallel = parallel
local settings_to_array = utilities.parsers.settings_to_array
local context = context
local implement = interfaces.implement
local data = { }
function parallel.define(category,tags)
local tags = 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 == v_all then
tags = table.keys(entries)
else
tags = 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,frombuffer)
if frombuffer then
content = buffers.raw(content)
end
local dc = data[category]
if not dc then
report_parallel("unknown category %a",category)
return
end
local entries = dc.entries[tag]
if not entries then
report_parallel("unknown entry %a",tag)
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
local function flush(content,label)
if done then
line = { }
insert(lines,line)
else
done = true
end
line.content = fullstrip(content)
line.label = label
end
local leading, rest = match(content,"^%s*([^%[]+)(.*)$")
if leading then
if leading ~= "" then
flush(leading)
end
content = rest
end
for label, content in gmatch(content,"%s*%[(.-)%]%s*([^%[]+)") do
if trace_parallel and label ~= "" then
report_parallel("reference found of category %a, tag %a, label %a",category,tag,label)
end
flush(content,label)
end
else
line.content = fullstrip(content)
line.label = ""
end
-- print("[["..line.content.."]]")
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 == v_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 ctx_doflushparallel = context.doflushparallel
local f_content = formatters["\\input{%s}"]
local save_byscheme = 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) -- options can be hash too
local start = tonumber(options.start)
local n = tonumber(options.n)
local criterium = options.criterium
local max = 1
if n then
max = n
elseif criterium == v_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)
local content = line and line.content
local label = line and line.label or ""
if content then
local virtual = save_byscheme("virtual","parallel",content)
ctx_doflushparallel(tag,1,number,label,f_content(virtual))
else
ctx_doflushparallel(tag,0,number,"","")
end
end
end
end
end
-- interface
implement {
name = "defineparallel",
actions = parallel.define,
arguments = { "string", "string" }
}
implement {
name = "nextparallel",
actions = parallel.next,
arguments = "string"
}
implement {
name = "saveparallel",
actions = parallel.save,
arguments = { "string", "string", "string", true },
}
implement {
name = "placeparallel",
actions = parallel.place,
arguments = {
"string",
"string",
{
{ "start" },
{ "n" },
{ "criterium" },
{ "setups" },
}
}
}
implement {
name = "resetparallel",
actions = parallel.reset,
arguments = { "string", "string" }
}
implement {
name = "doifelseparallel",
actions = { parallel.hassomecontent, commands.doifelse } ,
arguments = { "string", "string" }
}
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