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if not modules then modules = { } end modules ['lxml-ent'] = {
version = 1.001,
comment = "this module is the basis for the lxml-* ones",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local type, next, tonumber = type, next, tonumber
local texsprint, ctxcatcodes = tex.sprint, tex.ctxcatcodes
local utf = unicode.utf8
local byte, format = string.byte, string.format
local utfupper, utfchar = utf.upper, utf.char
local lpegmatch = lpeg.match
--[[ldx--
<p>We provide (at least here) two entity handlers. The more extensive
resolver consults a hash first, tries to convert to <l n='utf'/> next,
and finaly calls a handler when defines. When this all fails, the
original entity is returned.</p>
<p>We do things different now but it's still somewhat experimental</p>
--ldx]]--
local trace_entities = false trackers.register("xml.entities", function(v) trace_entities = v end)
local report_xml = logs.reporter("xml")
local xml = xml
xml.entities = xml.entities or { } -- xml.entity_handler == function
storage.register("xml/entities",xml.entities,"xml.entities") -- this will move to lxml
local entities = xml.entities -- this is a shared hash
xml.placeholders.unknown_any_entity = nil -- has to be per xml
local parsedentity = xml.parsedentitylpeg
function xml.registerentity(key,value)
entities[key] = value
if trace_entities then
report_xml("registering entity '%s' as: %s",key,value)
end
end
function xml.resolvedentity(str)
local e = entities[str]
if e then
local te = type(e)
if te == "function" then
e(str)
elseif e then
texsprint(ctxcatcodes,e)
end
else
-- resolve hex and dec, todo: escape # & etc for ctxcatcodes
-- normally this is already solved while loading the file
local chr, err = lpegmatch(parsedentity,str)
if chr then
texsprint(ctxcatcodes,chr)
elseif err then
texsprint(ctxcatcodes,err)
else
texsprint(ctxcatcodes,"\\xmle{",str,"}{",utfupper(str),"}") -- we need to use our own upper
end
end
end
entities.amp = function() tex.write("&") end
entities.lt = function() tex.write("<") end
entities.gt = function() tex.write(">") end
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