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if not modules then modules = { } end modules ['trac-deb'] = {
version = 1.001,
comment = "companion to trac-deb.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local lpegmatch = lpeg.match
local format, concat = string.format, table.concat
local tonumber, tostring = tonumber, tostring
local texdimen, textoks, texcount = tex.dimen, tex.toks, tex.count
local tracers = namespaces.private("tracers")
local report_system = logs.new("system")
tracers.lists = { }
tracers.strings = { }
tracers.strings.undefined = "undefined"
tracers.lists.scratch = {
0, 2, 4, 6, 8
}
tracers.lists.internals = {
'p:hsize', 'p:parindent', 'p:leftskip','p:rightskip',
'p:vsize', 'p:parskip', 'p:baselineskip', 'p:lineskip', 'p:topskip'
}
tracers.lists.context = {
'd:lineheight',
'c:realpageno', 'c:pageno', 'c:subpageno'
}
local types = {
['d'] = tracers.dimen,
['c'] = tracers.count,
['t'] = tracers.toks,
['p'] = tracers.primitive
}
local splitboth = lpeg.splitat(":")
local splittype = lpeg.firstofsplit(":")
local splitname = lpeg.secondofsplit(":")
function tracers.type(csname)
return lpegmatch(splittype,csname)
end
function tracers.name(csname)
return lpegmatch(splitname,csname) or csname
end
function tracers.cs(csname)
local tag, name = lpegmatch(splitboth,csname)
if name and types[tag] then
return types[tag](name)
else
return tracers.primitive(csname)
end
end
function tracers.dimen(name)
local d = texdimen[name]
return d and number.topoints(d) or tracers.strings.undefined
end
function tracers.count(name)
return texcount[name] or tracers.strings.undefined
end
function tracers.toks(name,limit)
local t = textoks[name]
return t and string.limit(t,tonumber(limit) or 40) or tracers.strings.undefined
end
function tracers.primitive(name)
return tex[name] or tracers.strings.undefined
end
function tracers.knownlist(name)
local l = tracers.lists[name]
return l and #l > 0
end
function tracers.showlines(filename,linenumber,offset)
local data = io.loaddata(filename)
local lines = data and string.splitlines(data)
if lines and #lines > 0 then
offset = tonumber(offset) or 10
linenumber = tonumber(linenumber) or 10
local start = math.max(linenumber - offset,1)
local stop = math.min(linenumber + offset,#lines)
if stop > #lines then
return "<linenumber past end of file>"
else
local result, fmt = { }, "%" .. #tostring(stop) .. "d %s %s"
for n=start,stop do
result[#result+1] = format(fmt,n,n == linenumber and ">>" or " ",lines[n])
end
return concat(result,"\n")
end
else
return "<empty file>"
end
end
function tracers.printerror(offset)
local filename, linenumber = status.filename, tonumber(status.linenumber) or 0
if not filename then
report_system("error not related to input file: %s ...",status.lasterrorstring)
elseif type(filename) == "number" then
report_system("error on line %s of filehandle %s: %s ...",linenumber,filename,status.lasterrorstring)
else
-- currently we still get the error message printed to the log/console so we
-- add a bit of spacing around our variant
texio.write_nl("\n")
report_system("error on line %s in file %s: %s ...\n",linenumber,filename,status.lasterrorstring or "?") -- lua error?
texio.write_nl(tracers.showlines(filename,linenumber,offset),"\n")
end
end
directives.register("system.errorcontext", function(v)
if v then
callback.register('show_error_hook', function() tracers.printerror(v) end)
else
callback.register('show_error_hook', nil)
end
end)
-- this might move
local lmx = namespaces.private("lmx")
if not lmx.variables then lmx.variables = { } end
lmx.htmfile = function(name) return environment.jobname .. "-status.html" end
lmx.lmxfile = function(name) return resolvers.find_file(name,'tex') end
function lmx.showdebuginfo(lmxname)
local variables = {
['title'] = 'ConTeXt Debug Information',
['color-background-one'] = lmx.get('color-background-green'),
['color-background-two'] = lmx.get('color-background-blue'),
}
if lmxname == false then
return variables
else
lmx.show(lmxname or 'context-debug.lmx',variables)
end
end
function lmx.showerror(lmxname)
local filename, linenumber, errorcontext = status.filename, tonumber(status.linenumber) or 0, ""
if not filename then
filename, errorcontext = 'unknown', 'error in filename'
elseif type(filename) == "number" then
filename, errorcontext = format("<read %s>",filename), 'unknown error'
else
errorcontext = tracers.showlines(filename,linenumber,offset)
end
local variables = {
['title'] = 'ConTeXt Error Information',
['errormessage'] = status.lasterrorstring,
['linenumber'] = linenumber,
['color-background-one'] = lmx.get('color-background-yellow'),
['color-background-two'] = lmx.get('color-background-purple'),
['filename'] = filename,
['errorcontext'] = errorcontext,
}
if lmxname == false then
return variables
else
lmx.show(lmxname or 'context-error.lmx',variables)
end
end
function lmx.overloaderror()
callback.register('show_error_hook', function() lmx.showerror() end) -- prevents arguments being passed
end
directives.register("system.showerror", lmx.overloaderror)
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