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if not modules then modules = { } end modules ['regi-ini'] = {
version = 1.001,
comment = "companion to regi-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
--[[ldx--
<p>Regimes take care of converting the input characters into
<l n='utf'/> sequences. The conversion tables are loaded at
runtime.</p>
--ldx]]--
local commands, context = commands, context
local utfchar, utfgsub = utf.char, utf.gsub
local char, gsub, format = string.char, string.gsub, string.format
local next = next
local insert, remove = table.insert, table.remove
local allocate = utilities.storage.allocate
local sequencers = utilities.sequencers
local textlineactions = resolvers.openers.helpers.textlineactions
local setmetatableindex = table.setmetatableindex
--[[ldx--
<p>We will hook regime handling code into the input methods.</p>
--ldx]]--
local trace_translating = false trackers.register("regimes.translating", function(v) trace_translating = v end)
local report_loading = logs.reporter("regimes","loading")
local report_translating = logs.reporter("regimes","translating")
regimes = regimes or { }
local regimes = regimes
local mapping = allocate {
utf = false
}
local backmapping = allocate {
}
-- regimes.mapping = mapping
local synonyms = { -- backward compatibility list
["windows-1250"] = "cp1250",
["windows-1251"] = "cp1251",
["windows-1252"] = "cp1252",
["windows-1253"] = "cp1253",
["windows-1254"] = "cp1254",
["windows-1255"] = "cp1255",
["windows-1256"] = "cp1256",
["windows-1257"] = "cp1257",
["windows-1258"] = "cp1258",
["il1"] = "8859-1",
["il2"] = "8859-2",
["il3"] = "8859-3",
["il4"] = "8859-4",
["il5"] = "8859-9",
["il6"] = "8859-10",
["il7"] = "8859-13",
["il8"] = "8859-14",
["il9"] = "8859-15",
["il10"] = "8859-16",
["iso-8859-1"] = "8859-1",
["iso-8859-2"] = "8859-2",
["iso-8859-3"] = "8859-3",
["iso-8859-4"] = "8859-4",
["iso-8859-9"] = "8859-9",
["iso-8859-10"] = "8859-10",
["iso-8859-13"] = "8859-13",
["iso-8859-14"] = "8859-14",
["iso-8859-15"] = "8859-15",
["iso-8859-16"] = "8859-16",
["latin1"] = "8859-1",
["latin2"] = "8859-2",
["latin3"] = "8859-3",
["latin4"] = "8859-4",
["latin5"] = "8859-9",
["latin6"] = "8859-10",
["latin7"] = "8859-13",
["latin8"] = "8859-14",
["latin9"] = "8859-15",
["latin10"] = "8859-16",
["utf-8"] = "utf",
["utf8"] = "utf",
[""] = "utf",
["windows"] = "cp1252",
}
local currentregime = "utf"
local function loadregime(mapping,regime)
local name = resolvers.findfile(format("regi-%s.lua",regime)) or ""
local data = name ~= "" and dofile(name)
if data then
vector = { }
for eightbit, unicode in next, data do
vector[char(eightbit)] = utfchar(unicode)
end
report_loading("vector '%s' is loaded",regime)
else
vector = false
report_loading("vector '%s' is unknown",regime)
end
mapping[regime] = vector
return vector
end
local function loadreverse(t,k)
local t = { }
for k, v in next, mapping[k] do
t[v] = k
end
backmapping[k] = t
return t
end
setmetatableindex(mapping, loadregime)
setmetatableindex(backmapping, loadreverse)
local function translate(line,regime)
if line and #line > 0 then
local map = mapping[regime and synonyms[regime] or regime or currentregime]
if map then
line = gsub(line,".",map)
end
end
return line
end
local function toregime(vector,str,default) -- toregime('8859-1',"abcde Ä","?")
local t = backmapping[vector]
local m = getmetatable(t)
setmetatableindex(t, function(t,k)
local v = default or "?"
t[k] = v
return v
end)
str = utfgsub(str,".",t)
setmetatable(t,m)
return str
end
local function disable()
currentregime = "utf"
sequencers.disableaction(textlineactions,"regimes.process")
end
local function enable(regime)
regime = synonyms[regime] or regime
if mapping[regime] == false then
disable()
else
currentregime = regime
sequencers.enableaction(textlineactions,"regimes.process")
end
end
regimes.toregime = toregime
regimes.translate = translate
regimes.enable = enable
regimes.disable = disable
-- The following function can be used when we want to make sure that
-- utf gets passed unharmed. This is needed for modules.
local level = 0
function regimes.process(str,filename,currentline,noflines,coding)
if level == 0 and coding ~= "utf-8" then
str = translate(str,currentregime)
if trace_translating then
report_translating("utf: %s",str)
end
end
return str
end
local function push()
level = level + 1
if trace_translating then
report_translating("pushing level: %s",level)
end
end
local function pop()
if level > 0 then
if trace_translating then
report_translating("popping level: %s",level)
end
level = level - 1
end
end
regimes.push = push
regimes.pop = pop
sequencers.prependaction(textlineactions,"system","regimes.process")
sequencers.disableaction(textlineactions,"regimes.process")
-- interface:
commands.enableregime = enable
commands.disableregime = disable
commands.pushregime = push
commands.popregime = pop
function commands.currentregime()
context(currentregime)
end
local stack = { }
function commands.startregime(regime)
insert(stack,currentregime)
if trace_translating then
report_translating("start: '%s'",regime)
end
enable(regime)
end
function commands.stopregime()
if #stack > 0 then
local regime = remove(stack)
if trace_translating then
report_translating("stop: '%s'",regime)
end
enable(regime)
end
end
-- obsolete:
--
-- function regimes.setsynonym(synonym,target)
-- synonyms[synonym] = target
-- end
--
-- function regimes.truename(regime)
-- return regime and synonyms[regime] or regime or currentregime
-- end
--
-- commands.setregimesynonym = regimes.setsynonym
--
-- function commands.trueregimename(regime)
-- context(regimes.truename(regime))
-- end
--
-- function regimes.load(regime)
-- return mapping[synonyms[regime] or regime]
-- end
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