diff options
Diffstat (limited to 'tex/context/base/mkiv/trac-set.lua')
| -rw-r--r-- | tex/context/base/mkiv/trac-set.lua | 380 |
1 files changed, 380 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/trac-set.lua b/tex/context/base/mkiv/trac-set.lua new file mode 100644 index 000000000..9e2bf8758 --- /dev/null +++ b/tex/context/base/mkiv/trac-set.lua @@ -0,0 +1,380 @@ +if not modules then modules = { } end modules ['trac-set'] = { -- might become util-set.lua + 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" +} + +-- maybe this should be util-set.lua + +local type, next, tostring = type, next, tostring +local concat = table.concat +local format, find, lower, gsub, topattern = string.format, string.find, string.lower, string.gsub, string.topattern +local is_boolean = string.is_boolean +local settings_to_hash = utilities.parsers.settings_to_hash +local allocate = utilities.storage.allocate + +utilities = utilities or { } +local utilities = utilities + +local setters = utilities.setters or { } +utilities.setters = setters + +local data = { } + +-- We can initialize from the cnf file. This is sort of tricky as +-- later defined setters also need to be initialized then. If set +-- this way, we need to ensure that they are not reset later on. + +local trace_initialize = false -- only for testing during development + +function setters.initialize(filename,name,values) -- filename only for diagnostics + local setter = data[name] + if setter then + frozen = true -- don't permitoverload + -- trace_initialize = true + local data = setter.data + if data then + for key, newvalue in next, values do + local newvalue = is_boolean(newvalue,newvalue,true) -- strict + local functions = data[key] + if functions then + local oldvalue = functions.value + if functions.frozen then + if trace_initialize then + setter.report("%s: %a is %s to %a",filename,key,"frozen",oldvalue) + end + elseif #functions > 0 and not oldvalue then +-- elseif #functions > 0 and oldvalue == nil then + if trace_initialize then + setter.report("%s: %a is %s to %a",filename,key,"set",newvalue) + end + for i=1,#functions do + functions[i](newvalue) + end + functions.value = newvalue + functions.frozen = functions.frozen or frozen + else + if trace_initialize then + setter.report("%s: %a is %s as %a",filename,key,"kept",oldvalue) + end + end + else + -- we do a simple preregistration i.e. not in the + -- list as it might be an obsolete entry + functions = { default = newvalue, frozen = frozen } + data[key] = functions + if trace_initialize then + setter.report("%s: %a is %s to %a",filename,key,"defaulted",newvalue) + end + end + end + return true + end + end +end + +-- user interface code + +local function set(t,what,newvalue) + local data = t.data + if not data.frozen then + local done = t.done + if type(what) == "string" then + what = settings_to_hash(what) -- inefficient but ok + end + if type(what) ~= "table" then + return + end + if not done then -- catch ... why not set? + done = { } + t.done = done + end + for w, value in next, what do + if value == "" then + value = newvalue + elseif not value then + value = false -- catch nil + else + value = is_boolean(value,value,true) -- strict + end + w = topattern(w,true,true) + for name, functions in next, data do + if done[name] then + -- prevent recursion due to wildcards + elseif find(name,w) then + done[name] = true + for i=1,#functions do + functions[i](value) + end + functions.value = value + end + end + end + end +end + +local function reset(t) + local data = t.data + if not data.frozen then + for name, functions in next, data do + for i=1,#functions do + functions[i](false) + end + functions.value = false + end + end +end + +local function enable(t,what) + set(t,what,true) +end + +local function disable(t,what) + local data = t.data + if not what or what == "" then + t.done = { } + reset(t) + else + set(t,what,false) + end +end + +function setters.register(t,what,...) + local data = t.data + what = lower(what) + local functions = data[what] + if not functions then + functions = { } + data[what] = functions + if trace_initialize then + t.report("defining %a",what) + end + end + local default = functions.default -- can be set from cnf file + for i=1,select("#",...) do + local fnc = select(i,...) + local typ = type(fnc) + if typ == "string" then + if trace_initialize then + t.report("coupling %a to %a",what,fnc) + end + local s = fnc -- else wrong reference + fnc = function(value) set(t,s,value) end + elseif typ ~= "function" then + fnc = nil + end + if fnc then + functions[#functions+1] = fnc + -- default: set at command line or in cnf file + -- value : set in tex run (needed when loading runtime) + local value = functions.value or default + if value ~= nil then + fnc(value) + functions.value = value + end + end + end + return false -- so we can use it in an assignment +end + +function setters.enable(t,what) + local e = t.enable + t.enable, t.done = enable, { } + enable(t,what) + t.enable, t.done = e, { } +end + +function setters.disable(t,what) + local e = t.disable + t.disable, t.done = disable, { } + disable(t,what) + t.disable, t.done = e, { } +end + +function setters.reset(t) + t.done = { } + reset(t) +end + +function setters.list(t) -- pattern + local list = table.sortedkeys(t.data) + local user, system = { }, { } + for l=1,#list do + local what = list[l] + if find(what,"^%*") then + system[#system+1] = what + else + user[#user+1] = what + end + end + return user, system +end + +function setters.show(t) + local category = t.name + local list = setters.list(t) + t.report() + for k=1,#list do + local name = list[k] + local functions = t.data[name] + if functions then + local value, default, modules = functions.value, functions.default, #functions + value = value == nil and "unset" or tostring(value) + default = default == nil and "unset" or tostring(default) + t.report("%-50s modules: %2i default: %-12s value: %-12s",name,modules,default,value) + end + end + t.report() +end + +-- we could have used a bit of oo and the trackers:enable syntax but +-- there is already a lot of code around using the singular tracker + +-- we could make this into a module but we also want the rest avaliable + +local enable, disable, register, list, show = setters.enable, setters.disable, setters.register, setters.list, setters.show + +function setters.report(setter,...) + print(format("%-15s : %s\n",setter.name,format(...))) +end + +local function default(setter,name) + local d = setter.data[name] + return d and d.default +end + +local function value(setter,name) + local d = setter.data[name] + return d and (d.value or d.default) +end + +function setters.new(name) -- we could use foo:bar syntax (but not used that often) + local setter -- we need to access it in setter itself + setter = { + data = allocate(), -- indexed, but also default and value fields + name = name, + report = function(...) setters.report (setter,...) end, + enable = function(...) enable (setter,...) end, + disable = function(...) disable (setter,...) end, + reset = function(...) reset (setter,...) end, -- can be dangerous + register = function(...) register(setter,...) end, + list = function(...) list (setter,...) end, + show = function(...) show (setter,...) end, + default = function(...) return default (setter,...) end, + value = function(...) return value (setter,...) end, + } + data[name] = setter + return setter +end + +trackers = setters.new("trackers") +directives = setters.new("directives") +experiments = setters.new("experiments") + +local t_enable, t_disable = trackers .enable, trackers .disable +local d_enable, d_disable = directives .enable, directives .disable +local e_enable, e_disable = experiments.enable, experiments.disable + +-- nice trick: we overload two of the directives related functions with variants that +-- do tracing (itself using a tracker) .. proof of concept + +local trace_directives = false local trace_directives = false trackers.register("system.directives", function(v) trace_directives = v end) +local trace_experiments = false local trace_experiments = false trackers.register("system.experiments", function(v) trace_experiments = v end) + +function directives.enable(...) + if trace_directives then + directives.report("enabling: % t",{...}) + end + d_enable(...) +end + +function directives.disable(...) + if trace_directives then + directives.report("disabling: % t",{...}) + end + d_disable(...) +end + +function experiments.enable(...) + if trace_experiments then + experiments.report("enabling: % t",{...}) + end + e_enable(...) +end + +function experiments.disable(...) + if trace_experiments then + experiments.report("disabling: % t",{...}) + end + e_disable(...) +end + +-- a useful example + +directives.register("system.nostatistics", function(v) + if statistics then + statistics.enable = not v + else + -- forget about it + end +end) + +directives.register("system.nolibraries", function(v) + if libraries then + libraries = nil -- we discard this tracing for security + else + -- no libraries defined + end +end) + +-- experiment + +if environment then + + -- The engineflags are known earlier than environment.arguments but maybe we + -- need to handle them both as the later are parsed differently. The c: prefix + -- is used by mtx-context to isolate the flags from those that concern luatex. + + local engineflags = environment.engineflags + + if engineflags then + local list = engineflags["c:trackers"] or engineflags["trackers"] + if type(list) == "string" then + setters.initialize("commandline flags","trackers",settings_to_hash(list)) + -- t_enable(list) + end + local list = engineflags["c:directives"] or engineflags["directives"] + if type(list) == "string" then + setters.initialize("commandline flags","directives", settings_to_hash(list)) + -- d_enable(list) + end + end + +end + +-- here + +if texconfig then + + -- this happens too late in ini mode but that is no problem + + local function set(k,v) + v = tonumber(v) + if v then + texconfig[k] = v + end + end + + directives.register("luatex.expanddepth", function(v) set("expand_depth",v) end) + directives.register("luatex.hashextra", function(v) set("hash_extra",v) end) + directives.register("luatex.nestsize", function(v) set("nest_size",v) end) + directives.register("luatex.maxinopen", function(v) set("max_in_open",v) end) + directives.register("luatex.maxprintline", function(v) set("max_print_line",v) end) + directives.register("luatex.maxstrings", function(v) set("max_strings",v) end) + directives.register("luatex.paramsize", function(v) set("param_size",v) end) + directives.register("luatex.savesize", function(v) set("save_size",v) end) + directives.register("luatex.stacksize", function(v) set("stack_size",v) end) + +end |