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if not modules then modules = { } end modules ['data-tex'] = {
version = 1.001,
comment = "companion to luat-lib.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local char = string.char
local trace_locating = false trackers.register("resolvers.locating", function(v) trace_locating = v end)
local report_tex = logs.reporter("resolvers","tex")
local resolvers = resolvers
local sequencers = utilities.sequencers
local methodhandler = resolvers.methodhandler
local splitlines = string.splitlines
local utffiletype = unicode.filetype
-- local fileprocessor = nil
-- local lineprocessor = nil
local textfileactions = sequencers.new {
arguments = "str,filename,coding",
returnvalues = "str",
results = "str",
}
local textlineactions = sequencers.new {
arguments = "str,filename,linenumber,noflines,coding",
returnvalues = "str",
results = "str",
}
local helpers = resolvers.openers.helpers
local appendgroup = sequencers.appendgroup
helpers.textfileactions = textfileactions
helpers.textlineactions = textlineactions
appendgroup(textfileactions,"before") -- user
appendgroup(textfileactions,"system") -- private
appendgroup(textfileactions,"after" ) -- user
appendgroup(textlineactions,"before") -- user
appendgroup(textlineactions,"system") -- private
appendgroup(textlineactions,"after" ) -- user
local ctrl_d = char( 4) -- unix
local ctrl_z = char(26) -- windows
function helpers.textopener(tag,filename,filehandle,coding)
local lines
local t_filehandle = type(filehandle)
if not filehandle then
lines = io.loaddata(filename)
elseif t_filehandle == "string" then
lines = filehandle
elseif t_filehandle == "table" then
lines = filehandle
else
lines = filehandle:read("*a")
filehandle:close()
end
if type(lines) == "string" then
local coding = coding or utffiletype(lines) -- so we can signal no regime
if trace_locating then
report_tex("%s opener, '%s' opened using method '%s'",tag,filename,coding)
end
if coding == "utf-16-be" then
lines = unicode.utf16_to_utf8_be(lines)
elseif coding == "utf-16-le" then
lines = unicode.utf16_to_utf8_le(lines)
elseif coding == "utf-32-be" then
lines = unicode.utf32_to_utf8_be(lines)
elseif coding == "utf-32-le" then
lines = unicode.utf32_to_utf8_le(lines)
else -- utf8 or unknown (could be a mkvi file)
local runner = textfileactions.runner
if runner then
lines = runner(lines,filename,coding) or lines
end
lines = splitlines(lines)
end
elseif trace_locating then
report_tex("%s opener, '%s' opened",tag,filename)
end
local noflines = #lines
if lines[noflines] == "" then -- maybe some special check is needed
lines[noflines] = nil
end
logs.show_open(filename)
return {
filename = filename,
noflines = noflines,
currentline = 0,
close = function()
if trace_locating then
report_tex("%s closer, '%s' closed",tag,filename)
end
logs.show_close(filename)
t = nil
end,
reader = function(self)
self = self or t
local currentline, noflines = self.currentline, self.noflines
if currentline >= noflines then
return nil
else
currentline = currentline + 1
self.currentline = currentline
local content = lines[currentline]
if not content then
return nil
elseif content == "" then
return ""
-- elseif content == ctrl_d or ctrl_z then
-- return nil -- we need this as \endinput does not work in prints
else
local runner = textlineactions.runner
if runner then
return runner(content,filename,currentline,noflines,coding) or content
else
return content
end
end
end
end
}
end
function resolvers.findtexfile(filename,filetype)
return methodhandler('finders',filename,filetype)
end
function resolvers.opentexfile(filename)
return methodhandler('openers',filename)
end
function resolvers.openfile(filename)
local fullname = methodhandler('finders',filename)
return fullname and fullname ~= "" and methodhandler('openers',fullname) or nil
end
function resolvers.loadtexfile(filename,filetype)
-- todo: optionally apply filters
local ok, data, size = resolvers.loadbinfile(filename, filetype)
return data or ""
end
resolvers.texdatablob = resolvers.loadtexfile
local function installhandler(namespace,what,where,func)
if not func then
where, func = "after", where
end
if where == "before" or where == "after" then
sequencers.appendaction(namespace,where,func)
else
report_tex("installing input %s handlers in %s is not possible",what,tostring(where))
end
end
function resolvers.installinputlinehandler(...) installhandler(helpers.textlineactions,"line",...) end
function resolvers.installinputfilehandler(...) installhandler(helpers.textfileactions,"file",...) end
-- local basename = file.basename
-- resolvers.installinputlinehandler(function(str,filename,linenumber,noflines)
-- report_tex("[lc] file: %s, line: %s of %s, length: %s",basename(filename),linenumber,noflines,#str)
-- end)
-- resolvers.installinputfilehandler(function(str,filename)
-- report_tex("[fc] file: %s, length: %s",basename(filename),#str)
-- end)
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