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if not modules then modules = { } end modules ['trac-lmx'] = {
version = 1.002,
comment = "companion to trac-lmx.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- todo: use lpeg instead (although not really needed)
local gsub, format, concat, byte = string.gsub, string.format, table.concat, string.byte
local allocate = utilities.storage.allocate
lmx = lmx or { }
local lmx = lmx
lmx.variables = allocate()
local lmxvariables = lmx.variables
local escapes = allocate {
['&'] = '&',
['<'] = '<',
['>'] = '>',
['"'] = '"'
}
-- variables
lmxvariables['title-default'] = 'ConTeXt LMX File'
lmxvariables['title'] = lmx.variables['title-default']
lmxvariables['color-background-green'] = '#4F6F6F'
lmxvariables['color-background-blue'] = '#6F6F8F'
lmxvariables['color-background-yellow'] = '#8F8F6F'
lmxvariables['color-background-purple'] = '#8F6F8F'
lmxvariables['color-background-body'] = '#808080'
lmxvariables['color-background-main'] = '#3F3F3F'
lmxvariables['color-background-one'] = lmxvariables['color-background-green']
lmxvariables['color-background-two'] = lmxvariables['color-background-blue']
lmxvariables['color-background-three'] = function() return lmxvariables['color-background-one'] end
lmxvariables['color-background-four'] = function() return lmxvariables['color-background-two'] end
function lmx.set(key, value)
lmxvariables[key] = value
end
function lmx.get(key)
return lmxvariables[key] or ""
end
-- helpers
local variables, result = { } -- we assume no nesting
local function do_print(one,two,...)
if two then
result[#result+1] = concat { one, two, ... }
else
result[#result+1] = one
end
end
local function do_escape(str)
str = tostring(str)
str = gsub(str,'&','&')
str = gsub(str,'[<>"]',escapes)
return str
end
local function do_urlescaped(str)
return (gsub(str,"[^%a%d]",format("%%0x",byte("%1"))))
end
local function do_type(str)
if str then do_print("<tt>" .. do_escape(str) .. "</tt>") end
end
local function do_variable(str)
local value = variables[str] or lmxvariables[str] -- or format("<!-- unset lmx instance variable: %s -->",str or "?")
if type(value) == "function" then
return value(str)
else
return value
end
end
function lmx.loadedfile(name)
name = (resolvers and resolvers.findfile and resolvers.findfile(name)) or name
return io.loaddata(name)
end
local function do_include(filename)
local stylepath = do_variable('includepath') -- todo: store paths of loaded files
local data = lmx.loadedfile(filename)
if (not data or data == "") and stylepath and stylepath ~= "" then
data = lmx.loadedfile(file.join(stylepath,filename))
end
if not data or data == "" then
data = format("<!-- unknown lmx include file: %s -->",filename)
end
return data
end
lmx.print = do_print
lmx.type = do_type
lmx.escape = do_escape
lmx.urlescape = do_escape
lmx.variable = do_variable
lmx.include = do_include
function lmx.pv(str)
do_print(do_variable(str) or "")
end
function lmx.tv(str)
lmx.type(do_variable(str) or "")
end
local template = [[
local definitions = { }
local p, v, e, t, pv, tv = lmx.print, lmx.variable, lmx.escape, lmx.type, lmx.pv, lmx.tv
%s
]]
local cache = { }
local trace = false
function lmx.new(data,variables)
data = data or ""
local known = cache[data]
if not known then
local definitions = { }
data = gsub(data,"<%?lmx%-include%s+(.-)%s-%?>", function(filename)
return lmx.include(filename)
end)
local definitions = { }
data = gsub(data,"<%?lmx%-define%-begin%s+(%S-)%s-%?>(.-)<%?lmx%-define%-end%s-%?>", function(tag,content)
definitions[tag] = content
return ""
end)
data = gsub(data,"<%?lmx%-resolve%s+(%S-)%s-%?>", function(tag)
return definitions[tag] or ""
end)
data = gsub(data .. "<?lua ?>","(.-)<%?lua%s+(.-)%s*%?>", function(txt,lua)
txt = gsub(txt,"%c+","\n")
return format("p(%q)%s ",txt,lua) -- nb! space
end)
data = format(template,data)
known = {
data = trace and data,
variables = variables or { },
converter = loadstring(data),
}
elseif variables then
known.variables = variables
end
return known, known.variables
end
function lmx.reset(self)
self.variables = { }
end
function lmx.result(self)
if trace then
return self.data
else
variables, result = self.variables, { }
self.converter()
return concat(result)
end
end
-- file converter
local loaded = { }
function lmx.convert(templatefile,resultfile,variables)
local data = loaded[templatefile]
if not data then
data = lmx.new(lmx.loadedfile(templatefile),variables)
loaded[template] = data
elseif variables then
data.variables = variables
end
local result = lmx.result(data)
if resultfile then
io.savedata(resultfile,result)
else
return lmx.result(data,result)
end
end
-- these can be overloaded; we assume that the os handles filename associations
lmx.lmxfile = function(filename) return filename end -- beware, these can be set!
lmx.htmfile = function(filename) return filename end -- beware, these can be set!
if os.type == "windows" then
lmx.popupfile = function(filename) os.execute("start " .. filename) end
else
lmx.popupfile = function(filename) os.execute(filename) end
end
function lmx.make(name,variables)
local lmxfile = lmx.lmxfile(name)
local htmfile = lmx.htmfile(name)
if lmxfile == htmfile then
htmfile = gsub(lmxfile, "%.%a+$", "html")
end
lmx.convert(lmxfile,htmfile,variables)
return htmfile
end
function lmx.show(name,variables)
local htmfile = lmx.make(name,variables)
lmx.popupfile(htmfile)
return htmfile
end
-- test
--~ print(lmx.result(lmx.new(io.loaddata("t:/sources/context-timing.lmx"))))
-- command line
if arg then
if arg[1] == "--show" then if arg[2] then lmx.show (arg[2]) end
elseif arg[1] == "--convert" then if arg[2] then lmx.convert(arg[2], arg[3] or "temp.html") end
end
end
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