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if not modules then modules = { } end modules ['page-ini'] = {
version = 1.001,
comment = "companion to page-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local tonumber, rawget, type, next = tonumber, rawget, type, next
local match = string.match
local sort, tohash, insert, remove = table.sort, table.tohash, table.insert, table.remove
local settings_to_array, settings_to_hash = utilities.parsers.settings_to_array, utilities.parsers.settings_to_hash
local texgetcount = tex.getcount
local context = context
local ctx_testcase = commands.testcase
local data = table.setmetatableindex("table")
local last = 0
local pages = structures.pages
local autolist = { }
local report = logs.reporter("pages","mark")
local trace = false trackers.register("pages.mark",function(v) trace = v end)
function pages.mark(name,list)
local realpage = texgetcount("realpageno")
if not list or list == "" then
if trace then
report("marking current page %i as %a",realpage,name)
end
data[realpage][name] = true
return
end
if type(list) == "string" then
list = settings_to_array(list)
end
if type(list) == "table" then
for i=1,#list do
local page = list[i]
local sign = false
if type(page) == "string" then
local s, p = match(page,"([%+%-])(%d+)")
if s then
sign, page = s, p
end
end
page = tonumber(page)
if page then
if sign == "+" then
page = realpage + page
end
if sign == "-" then
report("negative page numbers are not supported")
else
if trace then
report("marking page %i as %a",page,name)
end
data[page][name] = true
end
end
end
else
if trace then
report("marking current page %i as %a",realpage,name)
end
data[realpage][name] = true
end
end
function pages.marked(name)
local realpage = texgetcount("realpageno")
for i=last,realpage-1 do
data[i] = nil
end
local pagedata = rawget(data,realpage)
return pagedata and pagedata[name]
end
local function toranges(marked)
local list = { }
local size = #marked
if size > 0 then
local first = marked[1]
local last = first
for i=2,size do
local page = marked[i]
if page > last + 1 then
list[#list+1] = { first, last }
first = page
end
last = page
end
list[#list+1] = { first, last }
end
return list
end
pages.toranges = toranges
local function allmarked(list)
if list then
local collected = pages.collected
if collected then
if type(list) == "string" then
list = settings_to_hash(list)
elseif type(list) == "table" and #list > 0 then
list = tohash(list)
end
if type(list) == "table" then
local found = { }
for name in next, list do
for page, list in next, data do
if list[name] and collected[page] then
found[#found+1] = page
end
end
end
if #found > 0 then
sort(found)
if trace then
local ranges = toranges(found)
for i=1,#ranges do
local range = ranges[i]
local first = range[1]
local last = range[2]
if first == last then
report("marked page : %i",first)
else
report("marked range: %i upto %i",first,last)
end
end
end
return found
end
end
end
end
end
pages.allmarked = allmarked
-- An alternative is to use an attribute and identify the state by parsing the node
-- list but that's a bit overkill for a hardly used feature like this.
luatex.registerpageactions(function()
local nofauto = #autolist
if nofauto > 0 then
local realpage = texgetcount("realpageno")
for i=1,nofauto do
local names = autolist[i]
for j=1,#names do
local name = names[j]
data[realpage][name] = true
if trace then
report("automatically marking page %i as %a",realpage,name)
end
end
end
end
end)
interfaces.implement {
name = "markpage",
arguments = { "string", "string" },
actions = pages.mark
}
interfaces.implement {
name = "doifelsemarkedpage",
arguments = "string",
actions = { marked, ctx_testcase }
}
interfaces.implement {
name = "markedpages",
arguments = "string",
actions = function(name)
local t = allmarked(name)
if t then
context("%,t",t)
end
end
}
interfaces.implement {
name = "startmarkpages",
arguments = "string",
actions = function(name)
insert(autolist,settings_to_array(name))
end
}
interfaces.implement {
name = "stopmarkpages",
arguments = "string",
actions = function(name)
if #autolist > 0 then
remove(autolist)
end
end
}
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