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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"
}
-- Some day I need to make this more efficient.
local tonumber, rawget, rawset, type, next = tonumber, rawget, rawset, type, next
local match = string.match
local sort, tohash, insert, remove, sortedkeys = table.sort, table.tohash, table.insert, table.remove, table.sortedkeys
local settings_to_array, settings_to_hash = utilities.parsers.settings_to_array, utilities.parsers.settings_to_hash
local texgetcount = tex.getcount
local tonut = nodes.tonut
local nextlist = nodes.nuts.traversers.list
local texlists = tex.lists
local context = context
local ctx_doif = commands.doif
local ctx_doifelse = commands.doifelse
local implement = interfaces.implement
local data = table.setmetatableindex("table")
local last = 0
local pages = structures.pages
local autolist = { }
local report = logs.reporter("pages","mark")
local active = false
local trace = false trackers.register("pages.mark",function(v) trace = v end)
function pages.mark(name,list,settings)
active = true
--
local realpage = texgetcount("realpageno")
if type(settings) == "string" then
settings = settings_to_hash(settings)
end
if not list or list == "" then
if trace then
report("marking current page %i as %a",realpage,name)
end
data[realpage][name] = settings or 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 f, t = match(page,"(%d+)[:%-](%d+)")
if f and t then
f, t = tonumber(f), tonumber(t)
if f and t and f <= t then
if trace then
report("marking page %i upto %i as %a",f,t,name)
end
for page=f,t do
data[page][name] = settings or true
end
end
page = false
else
local s, p = match(page,"([%+%-])(%d+)")
if s then
sign, page = s, p
end
end
end
if page then
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] = settings or true
end
end
end
end
else
if trace then
report("marking current page %i as %a",realpage,name)
end
data[realpage][name] = settings or true
end
end
local tobemarked = { }
function pages.markedlist(realpage)
if active and realpage then
local m = rawget(tobemarked,realpage) or rawget(data,realpage)
return m and next(m) and sortedkeys(m)
end
end
local function marked(name)
if active then
local realpage = texgetcount("realpageno")
if last ~= 0 then
for i=last,realpage-1 do
-- print(last)
local di = data[i]
if di then
tobemarked[i] = di
rawset(data,i,nil)
end
end
last = 0 -- needs checking
end
local pagedata = rawget(data,realpage)
return pagedata and pagedata[name] and true or false
else
return false
end
end
local function markedparameter(name,key)
if active then
local pagedata = rawget(data,texgetcount("realpageno"))
if pagedata then
pagedata = pagedata[name]
if pagedata then
pagedata = pagedata[key]
end
end
return pagedata
end
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 }
--
active = true
end
return list
end
local function allmarked(list)
if active and 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.marked = marked
pages.toranges = toranges
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.
-- Page actions are bound to a real page. When we set one, we need to bind to the
-- current page unless we just flushed. So we also need to check the current page.
-- \page ... \start : sync realpage
-- \page \start : sync realpage
-- \page \stop : reset synced because no content yet
-- \page ... \stop : keep sync
local function autopageaction()
if active then
local nofauto = #autolist
if nofauto > 0 then
local realpage = texgetcount("realpageno")
for i=1,nofauto do
local entry = autolist[i]
local names = entry[1]
local settings = entry[2]
for j=1,#names do
local name = names[j]
local list = data[realpage]
if not list[name] then
if trace then
report("automatically marking page %i as %a",realpage,name)
end
list[name] = settings or true
end
end
end
end
end
end
local function startmarked(name,settings)
active = true
--
insert(autolist, { settings_to_array(name), settings_to_hash(settings) })
autopageaction(true)
end
local function stopmarked()
local nofauto = #autolist
if nofauto > 0 then
if not texlists.pagehead then
local realpage = texgetcount("realpageno")
for i=1,nofauto do
local entry = autolist[i]
local names = entry[1]
for j=1,#names do
local name = names[j]
local list = data[realpage]
if list[name] then
if trace then
report("automatically unmarking page %i as %a",realpage,name)
end
list[name] = nil
end
end
end
end
remove(autolist)
end
end
implement {
name = "checkmarkedpages",
actions = autopageaction,
}
implement {
name = "markpage",
arguments = "3 strings",
actions = pages.mark
}
implement {
name = "doifelsemarkedpage",
arguments = "string",
actions = { marked, ctx_doifelse }
}
implement {
name = "doifmarkedpage",
arguments = "string",
actions = { marked, ctx_doif }
}
implement {
name = "markedpageparameter",
arguments = "strings",
actions = function(name,key)
local value = markedparameter(name,key)
if value then
context(value)
end
end
}
implement {
name = "markedpages",
arguments = "string",
actions = function(name)
local t = allmarked(name)
if t then
context("%,t",t)
end
end
}
implement {
name = "startmarkpages",
arguments = "2 strings",
actions = startmarked,
}
implement {
name = "stopmarkpages",
actions = stopmarked,
}
local tonut = nodes.tonut
local nextlist = nodes.nuts.traversers.list
local texlists = tex.lists
implement {
name = "doifelsependingpagecontent",
actions = function()
local h = texlists.contrib_head
-- local t = texlists.contrib_tail
local p = false
if h then
for n in nextlist, tonut(h) do
p = true
break
end
end
ctx_doifelse(p)
end,
}
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