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Diffstat (limited to 'tex/context/base/mkiv/regi-ini.lua')
| -rw-r--r-- | tex/context/base/mkiv/regi-ini.lua | 436 |
1 files changed, 436 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/regi-ini.lua b/tex/context/base/mkiv/regi-ini.lua new file mode 100644 index 000000000..37a88fd5f --- /dev/null +++ b/tex/context/base/mkiv/regi-ini.lua @@ -0,0 +1,436 @@ +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 = utf.char +local P, Cs, Cc, lpegmatch = lpeg.P, lpeg.Cs, lpeg.Cc, lpeg.match +local char, gsub, format, gmatch, byte, match = string.char, string.gsub, string.format, string.gmatch, string.byte, string.match +local next = next +local insert, remove, fastcopy = table.insert, table.remove, table.fastcopy +local concat = table.concat +local totable = string.totable + +local allocate = utilities.storage.allocate +local sequencers = utilities.sequencers +local textlineactions = resolvers.openers.helpers.textlineactions +local setmetatableindex = table.setmetatableindex + +local implement = interfaces.implement +local setmacro = interfaces.setmacro + +--[[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", + + ["pdf"] = "pdfdoc", + +} + +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 %a is loaded",regime) + else + vector = false + report_loading("vector %a 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 fromregime(regime,line) + 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 remappers = { } +-- +-- local function toregime(vector,str,default) -- toregime('8859-1',"abcde Ä","?") +-- local t = backmapping[vector] +-- local remapper = remappers[vector] +-- if not remapper then +-- remapper = utf.remapper(t) +-- remappers[t] = remapper +-- end +-- local m = getmetatable(t) +-- setmetatableindex(t, function(t,k) +-- local v = default or "?" +-- t[k] = v +-- return v +-- end) +-- str = remapper(str) +-- setmetatable(t,m) +-- return str +-- end +-- +-- -- much faster (but only matters when we have > 10K calls + +local cache = { } -- if really needed we can copy vectors and hash defaults + +setmetatableindex(cache, function(t,k) + local v = { remappers = { } } + t[k] = v + return v +end) + +local function toregime(vector,str,default) -- toregime('8859-1',"abcde Ä","?") + local d = default or "?" + local c = cache[vector].remappers + local r = c[d] + if not r then + local t = fastcopy(backmapping[vector]) + -- r = utf.remapper(t) -- not good for defaults here + local pattern = Cs((lpeg.utfchartabletopattern(t)/t + lpeg.patterns.utf8character/d + P(1)/d)^0) + r = function(str) + if not str or str == "" then + return "" + else + return lpegmatch(pattern,str) + end + end + c[d] = r + end + return r(str) +end + +local function disable() + currentregime = "utf" + sequencers.disableaction(textlineactions,"regimes.process") + return currentregime +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 + return currentregime +end + +regimes.toregime = toregime +regimes.fromregime = fromregime +regimes.translate = function(str,regime) return fromregime(regime,str) end +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 = fromregime(currentregime,str) + 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 + +if sequencers then + + sequencers.prependaction(textlineactions,"system","regimes.process") + sequencers.disableaction(textlineactions,"regimes.process") + +end + +-- interface: + +implement { + name = "enableregime", + arguments = "string", + actions = function(regime) setmacro("currentregime",enable(regime)) end +} + +implement { + name = "disableregime", + actions = function() setmacro("currentregime",disable()) end +} + +implement { + name = "pushregime", + actions = push +} + +implement { + name = "popregime", + actions = pop +} + +local stack = { } + +implement { + name = "startregime", + arguments = "string", + actions = function(regime) + insert(stack,currentregime) + if trace_translating then + report_translating("start using %a",regime) + end + setmacro("currentregime",enable(regime)) + end +} + +implement { + name = "stopregime", + actions = function() + if #stack > 0 then + local regime = remove(stack) + if trace_translating then + report_translating("stop using %a",regime) + end + setmacro("currentregime",enable(regime)) + end + end +} + +-- Next we provide some hacks. Unfortunately we run into crappy encoded +-- (read : mixed) encoded xml files that have these ë ä ö ü sequences +-- instead of ë ä ö ü + +local patterns = { } + +-- function regimes.cleanup(regime,str) +-- local p = patterns[regime] +-- if p == nil then +-- regime = regime and synonyms[regime] or regime or currentregime +-- local vector = regime ~= "utf" and mapping[regime] +-- if vector then +-- local list = { } +-- for k, uchar in next, vector do +-- local stream = totable(uchar) +-- for i=1,#stream do +-- stream[i] = vector[stream[i]] +-- end +-- list[concat(stream)] = uchar +-- end +-- p = lpeg.append(list,nil,true) +-- p = Cs((p+1)^0) +-- -- lpeg.print(p) -- size 1604 +-- else +-- p = false +-- end +-- patterns[vector] = p +-- end +-- return p and lpegmatch(p,str) or str +-- end +-- +-- twice as fast and much less lpeg bytecode + +-- function regimes.cleanup(regime,str) +-- if not str or str == "" then +-- return str +-- end +-- local p = patterns[regime] +-- if p == nil then +-- regime = regime and synonyms[regime] or regime or currentregime +-- local vector = regime ~= "utf" and regime ~= "utf-8" and mapping[regime] +-- if vector then +-- local utfchars = { } +-- local firsts = { } +-- for k, uchar in next, vector do +-- local stream = { } +-- local split = totable(uchar) +-- local nofsplits = #split +-- if nofsplits > 1 then +-- local first +-- for i=1,nofsplits do +-- local u = vector[split[i]] +-- if not first then +-- first = firsts[u] +-- if not first then +-- first = { } +-- firsts[u] = first +-- end +-- end +-- stream[i] = u +-- end +-- local nofstream = #stream +-- if nofstream > 1 then +-- first[#first+1] = concat(stream,2,nofstream) +-- utfchars[concat(stream)] = uchar +-- end +-- end +-- end +-- p = P(false) +-- for k, v in next, firsts do +-- local q = P(false) +-- for i=1,#v do +-- q = q + P(v[i]) +-- end +-- p = p + P(k) * q +-- end +-- p = Cs(((p+1)/utfchars)^1) +-- -- lpeg.print(p) -- size: 1042 +-- else +-- p = false +-- end +-- patterns[regime] = p +-- end +-- return p and lpegmatch(p,str) or str +-- end +-- +-- 5 times faster: + +function regimes.cleanup(regime,str) + if not str or str == "" then + return str + end + local p = patterns[regime] + if p == nil then + regime = regime and synonyms[regime] or regime or currentregime + local vector = regime ~= "utf" and regime ~= "utf-8" and mapping[regime] + if vector then + local mapping = { } + for k, v in next, vector do + local split = totable(v) + for i=1,#split do + split[i] = utfchar(byte(split[i])) + end + split = concat(split) + if v ~= split then + mapping[split] = v + end + end + p = Cs((lpeg.utfchartabletopattern(mapping)/mapping+P(1))^0) + else + p = false + end + patterns[regime] = p + end + return p and lpegmatch(p,str) or str +end + +-- local old = [[test ë ä ö ü crap]] +-- local new = regimes.cleanup("cp1252",old) +-- report_translating("%s -> %s",old,new) +-- local old = "Pozn" .. char(0xE1) .. "mky" +-- local new = fromregime("cp1250",old) +-- report_translating("%s -> %s",old,new) |