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Diffstat (limited to 'tex/context/base/strc-num.lua')
-rw-r--r--tex/context/base/strc-num.lua1298
1 files changed, 649 insertions, 649 deletions
diff --git a/tex/context/base/strc-num.lua b/tex/context/base/strc-num.lua
index 6245a537e..b0eae6b78 100644
--- a/tex/context/base/strc-num.lua
+++ b/tex/context/base/strc-num.lua
@@ -1,649 +1,649 @@
-if not modules then modules = { } end modules ['strc-num'] = {
- version = 1.001,
- comment = "companion to strc-num.mkiv",
- author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
- copyright = "PRAGMA ADE / ConTeXt Development Team",
- license = "see context related readme files"
-}
-
-local format = string.format
-local next, type = next, type
-local min, max = math.min, math.max
-local texcount, texsetcount = tex.count, tex.setcount
-
--- Counters are managed here. They can have multiple levels which makes it easier to synchronize
--- them. Synchronization is sort of special anyway, as it relates to document structuring.
-
-local allocate = utilities.storage.allocate
-local setmetatableindex = table.setmetatableindex
-
-local trace_counters = false trackers.register("structures.counters", function(v) trace_counters = v end)
-local report_counters = logs.reporter("structure","counters")
-
-local structures = structures
-local helpers = structures.helpers
-local sections = structures.sections
-local counters = structures.counters
-local documents = structures.documents
-
-local variables = interfaces.variables
-local v_start = variables.start
-local v_page = variables.page
-local v_reverse = variables.reverse
-local v_first = variables.first
-local v_next = variables.next
-local v_previous = variables.previous
-local v_prev = variables.prev
-local v_last = variables.last
------ v_no = variables.no
-local v_backward = variables.backward
-local v_forward = variables.forward
------ v_subs = variables.subs or "subs"
-
--- states: start stop none reset
-
--- specials are used for counters that are set and incremented in special ways, like
--- pagecounters that get this treatment in the page builder
-
-counters.specials = counters.specials or { }
-local counterspecials = counters.specials
-
-local counterranges, tbs = { }, 0
-
-counters.collected = allocate()
-counters.tobesaved = counters.tobesaved or { }
-counters.data = counters.data or { }
-
-storage.register("structures/counters/data", counters.data, "structures.counters.data")
-storage.register("structures/counters/tobesaved", counters.tobesaved, "structures.counters.tobesaved")
-
-local collected = counters.collected
-local tobesaved = counters.tobesaved
-local counterdata = counters.data
-
-local function initializer() -- not really needed
- collected = counters.collected
- tobesaved = counters.tobesaved
- counterdata = counters.data
-end
-
-local function finalizer()
- for name, cd in next, counterdata do
- local cs = tobesaved[name]
- local data = cd.data
- for i=1,#data do
- local d = data[i]
- local r = d.range
- cs[i][r] = d.number
- d.range = r + 1
- end
- end
-end
-
-job.register('structures.counters.collected', tobesaved, initializer, finalizer)
-
-local constructor = { -- maybe some day we will provide an installer for more variants
-
- last = function(t,name,i)
- local cc = collected[name]
- local stop = (cc and cc[i] and cc[i][t.range]) or 0 -- stop is available for diagnostics purposes only
- t.stop = stop
- if t.offset then
- return stop - t.step
- else
- return stop
- end
- end,
-
- first = function(t,name,i)
- local start = t.start
- if start > 0 then
- return start -- brrr
- elseif t.offset then
- return start + t.step + 1
- else
- return start + 1
- end
- end,
-
- prev = function(t,name,i)
- return max(t.first,t.number-1) -- todo: step
- end,
-
- previous = function(t,name,i)
- return max(t.first,t.number-1) -- todo: step
- end,
-
- next = function(t,name,i)
- return min(t.last,t.number+1) -- todo: step
- end,
-
- backward =function(t,name,i)
- if t.number - 1 < t.first then
- return t.last
- else
- return t.previous
- end
- end,
-
- forward = function(t,name,i)
- if t.number + 1 > t.last then
- return t.first
- else
- return t.next
- end
- end,
-
- subs = function(t,name,i)
- local cc = collected[name]
- t.subs = (cc and cc[i+1] and cc[i+1][t.range]) or 0
- return t.subs
- end,
-
-}
-
-local function dummyconstructor(t,name,i)
- return nil -- was 0, but that is fuzzy in testing for e.g. own
-end
-
-setmetatableindex(constructor,function(t,k)
- if trace_counters then
- report_counters("unknown constructor %a",k)
- end
- return dummyconstructor
-end)
-
-local function enhance()
- for name, cd in next, counterdata do
- local data = cd.data
- for i=1,#data do
- local ci = data[i]
- setmetatableindex(ci, function(t,s) return constructor[s](t,name,i) end)
- end
- end
- enhance = nil
-end
-
-local function allocate(name,i) -- can be metatable
- local cd = counterdata[name]
- if not cd then
- cd = {
- level = 1,
- -- block = "", -- todo
- numbers = nil,
- state = v_start, -- true
- data = { },
- saved = { },
- }
- tobesaved[name] = { }
- counterdata[name] = cd
- end
- cd = cd.data
- local ci = cd[i]
- if not ci then
- ci = {
- number = 0,
- start = 0,
- saved = 0,
- step = 1,
- range = 1,
- offset = false,
- stop = 0, -- via metatable: last, first, stop only for tracing
- }
- setmetatableindex(ci, function(t,s) return constructor[s](t,name,i) end)
- cd[i] = ci
- tobesaved[name][i] = { }
- else
- if enhance then enhance() end -- not stored in bytecode
- end
- return ci
-end
-
-function counters.record(name,i)
- return allocate(name,i or 1)
-end
-
-local function savevalue(name,i)
- if name then
- local cd = counterdata[name].data[i]
- local cs = tobesaved[name][i]
- local cc = collected[name]
- if trace_counters then
- report_counters("action %a, counter %s, value %s","save",name,cd.number)
- end
- local cr = cd.range
- local old = (cc and cc[i] and cc[i][cr]) or 0
- local number = cd.number
- if cd.method == v_page then
- -- we can be one page ahead
- number = number - 1
- end
- cs[cr] = (number >= 0) and number or 0
- cd.range = cr + 1
- return old
- else
- return 0
- end
-end
-
-function counters.define(specification)
- local name = specification.name
- if name and name ~= "" then
- -- todo: step
- local d = allocate(name,1)
- d.start = tonumber(specification.start) or 0
- d.state = v_state or ""
- local counter = specification.counter
- if counter and counter ~= "" then
- d.counter = counter -- only for special purposes, cannot be false
- d.method = specification.method -- frozen at define time
- end
- end
-end
-
-function counters.raw(name)
- return counterdata[name]
-end
-
-function counters.compact(name,level,onlynumbers)
- local cd = counterdata[name]
- if cd then
- local data = cd.data
- local compact = { }
- for i=1,level or #data do
- local d = data[i]
- if d.number ~= 0 then
- compact[i] = (onlynumbers and d.number) or d
- end
- end
- return compact
- end
-end
-
--- depends on when incremented, before or after (driven by d.offset)
-
-function counters.previous(name,n)
- return allocate(name,n).previous
-end
-
-function counters.next(name,n)
- return allocate(name,n).next
-end
-
-counters.prev = counters.previous
-
-function counters.currentvalue(name,n)
- return allocate(name,n).number
-end
-
-function counters.first(name,n)
- return allocate(name,n).first
-end
-
-function counters.last(name,n)
- return allocate(name,n).last
-end
-
-function counters.subs(name,n)
- return counterdata[name].data[n].subs or 0
-end
-
-local function setvalue(name,tag,value)
- local cd = counterdata[name]
- if cd then
- cd[tag] = value
- end
-end
-
-counters.setvalue = setvalue
-
-function counters.setstate(name,value) -- true/false
- value = variables[value]
- if value then
- setvalue(name,"state",value)
- end
-end
-
-function counters.setlevel(name,value)
- setvalue(name,"level",value)
-end
-
-function counters.setoffset(name,value)
- setvalue(name,"offset",value)
-end
-
-local function synchronize(name,d)
- local dc = d.counter
- if dc then
- if trace_counters then
- report_counters("action %a, name %a, counter %a, value %a","synchronize",name,dc,d.number)
- end
- texsetcount("global",dc,d.number)
- end
- local cs = counterspecials[name]
- if cs then
- if trace_counters then
- report_counters("action %a, name %a, counter %a","synccommand",name,dc)
- end
- cs(name)
- end
-end
-
-local function reset(name,n)
- local cd = counterdata[name]
- if cd then
- for i=n or 1,#cd.data do
- local d = cd.data[i]
- savevalue(name,i)
- local number = d.start or 0
- d.number = number
- d.own = nil
- if trace_counters then
- report_counters("action %a, name %a, sub %a, value %a","reset",name,i,number)
- end
- synchronize(name,d)
- end
- cd.numbers = nil
- else
- end
-end
-
-local function set(name,n,value)
- local cd = counterdata[name]
- if cd then
- local d = allocate(name,n)
- local number = value or 0
- d.number = number
- d.own = nil
- if trace_counters then
- report_counters("action %a, name %a, sub %a, value %a","set",name,"no",number)
- end
- synchronize(name,d)
- end
-end
-
-local function check(name,data,start,stop)
- for i=start or 1,stop or #data do
- local d = data[i]
- savevalue(name,i)
- local number = d.start or 0
- d.number = number
- d.own = nil
- if trace_counters then
- report_counters("action %a, name %a, sub %a, value %a","check",name,i,number)
- end
- synchronize(name,d)
- end
-end
-
-counters.reset = reset
-counters.set = set
-
-function counters.setown(name,n,value)
- local cd = counterdata[name]
- if cd then
- local d = allocate(name,n)
- d.own = value
- d.number = (d.number or d.start or 0) + (d.step or 0)
- local level = cd.level
- if not level or level == -1 then
- -- -1 is signal that we reset manually
- elseif level > 0 or level == -3 then
- check(name,d,n+1)
- elseif level == 0 then
- -- happens elsewhere, check this for block
- end
- synchronize(name,d)
- end
-end
-
-function counters.restart(name,n,newstart,noreset)
- local cd = counterdata[name]
- if cd then
- newstart = tonumber(newstart)
- if newstart then
- local d = allocate(name,n)
- d.start = newstart
- if not noreset then
- reset(name,n) -- hm
- end
- end
- end
-end
-
-function counters.save(name) -- or just number
- local cd = counterdata[name]
- if cd then
- table.insert(cd.saved,table.copy(cd.data))
- end
-end
-
-function counters.restore(name)
- local cd = counterdata[name]
- if cd and cd.saved then
- cd.data = table.remove(cd.saved)
- end
-end
-
-function counters.add(name,n,delta)
- local cd = counterdata[name]
- if cd and (cd.state == v_start or cd.state == "") then
- local data = cd.data
- local d = allocate(name,n)
- d.number = (d.number or d.start or 0) + delta*(d.step or 0)
- -- d.own = nil
- local level = cd.level
- if not level or level == -1 then
- -- -1 is signal that we reset manually
- if trace_counters then
- report_counters("action %a, name %a, sub %a, how %a","add",name,"no","no checking")
- end
- elseif level == -2 then
- -- -2 is signal that we work per text
- if trace_counters then
- report_counters("action %a, name %a, sub %a, how %a","add",name,"text","checking")
- end
- check(name,data,n+1)
- elseif level > 0 or level == -3 then
- -- within countergroup
- if trace_counters then
- report_counters("action %a, name %a, sub %a, how %a","add",name,level,"checking within group")
- end
- check(name,data,n+1)
- elseif level == 0 then
- -- happens elsewhere
- if trace_counters then
- report_counters("action %a, name %a, sub %a, how %a","add",name,level,"no checking")
- end
- else
- if trace_counters then
- report_counters("action %a, name %a, sub %a, how %a","add",name,"unknown","no checking")
- end
- end
- synchronize(name,d)
- return d.number -- not needed
- end
- return 0
-end
-
-function counters.check(level)
- for name, cd in next, counterdata do
- if level > 0 and cd.level == -3 then -- could become an option
- if trace_counters then
- report_counters("action %a, name %a, sub %a, detail %a","reset",name,level,"head")
- end
- reset(name)
- elseif cd.level == level then
- if trace_counters then
- report_counters("action %a, name %a, sub %a, detail %a","reset",name,level,"normal")
- end
- reset(name)
- end
- end
-end
-
-local function get(name,n,key)
- local d = allocate(name,n)
- d = d and d[key]
- if not d then
- return 0
- elseif type(d) == "function" then
- return d()
- else
- return d
- end
-end
-
-counters.get = get
-
-function counters.value(name,n) -- what to do with own
- return get(name,n or 1,'number') or 0
-end
-
-function counters.converted(name,spec) -- name can be number and reference to storage
- local cd
- if type(name) == "number" then
- cd = specials.retrieve("counter",name)
- cd = cd and cd.counter
- else
- cd = counterdata[name]
- end
- if cd then
- local spec = spec or { }
- local numbers, ownnumbers = { }, { }
- local reverse = spec.order == v_reverse
- local kind = spec.type or "number"
- local data = cd.data
- for k=1,#data do
- local v = data[k]
- -- somewhat messy, what if subnr? only last must honour kind?
- local vn
- if v.own then
- numbers[k], ownnumbers[k] = v.number, v.own
- else
- if kind == v_first then
- vn = v.first
- elseif kind == v_next then
- vn = v.next
- elseif kind == v_prev or kind == v_previous then
- vn = v.prev
- elseif kind == v_last then
- vn = v.last
- else
- vn = v.number
- if reverse then
- local vf = v.first
- local vl = v.last
- if vl > 0 then
- -- vn = vl - vn + 1 + vf
- vn = vl - vn + vf -- see testbed for test
- end
- end
- end
- numbers[k], ownnumbers[k] = vn or v.number, nil
- end
- end
- cd.numbers = numbers
- cd.ownnumbers = ownnumbers
- sections.typesetnumber(cd,'number',spec)
- cd.numbers = nil
- cd.ownnumbers = nil
- end
-end
-
--- interfacing
-
-commands.definecounter = counters.define
-commands.setcounter = counters.set
-commands.setowncounter = counters.setown
-commands.resetcounter = counters.reset
-commands.restartcounter = counters.restart
-commands.savecounter = counters.save
-commands.restorecounter = counters.restore
-commands.addcounter = counters.add
-
-commands.rawcountervalue = function(...) context(counters.raw (...)) end
-commands.countervalue = function(...) context(counters.value (...)) end
-commands.lastcountervalue = function(...) context(counters.last (...)) end
-commands.firstcountervalue = function(...) context(counters.first (...)) end
-commands.nextcountervalue = function(...) context(counters.next (...)) end
-commands.prevcountervalue = function(...) context(counters.previous(...)) end
-commands.subcountervalues = function(...) context(counters.subs (...)) end
-
-function commands.showcounter(name)
- local cd = counterdata[name]
- if cd then
- context("[%s:",name)
- local data = cd.data
- for i=1,#data do
- local d = data[i]
- context(" (%s: %s,%s,%s s:%s r:%s)",i,d.start or 0,d.number or 0,d.last,d.step or 0,d.range or 0)
- end
- context("]")
- end
-end
-
-function commands.doifelsecounter(name) commands.doifelse(counterdata[name]) end
-function commands.doifcounter (name) commands.doif (counterdata[name]) end
-function commands.doifnotcounter (name) commands.doifnot (counterdata[name]) end
-
-function commands.incrementedcounter(...) context(counters.add(...)) end
-
-function commands.checkcountersetup(name,level,start,state)
- counters.restart(name,1,start,true) -- no reset
- counters.setstate(name,state)
- counters.setlevel(name,level)
- sections.setchecker(name,level,counters.reset)
-end
-
--- -- move to strc-pag.lua
---
--- function counters.analyze(name,counterspecification)
--- local cd = counterdata[name]
--- -- safeguard
--- if not cd then
--- return false, false, "no counter data"
--- end
--- -- section data
--- local sectiondata = sections.current()
--- if not sectiondata then
--- return cd, false, "not in section"
--- end
--- local references = sectiondata.references
--- if not references then
--- return cd, false, "no references"
--- end
--- local section = references.section
--- if not section then
--- return cd, false, "no section"
--- end
--- sectiondata = sections.collected[references.section]
--- if not sectiondata then
--- return cd, false, "no section data"
--- end
--- -- local preferences
--- local no = v_no
--- if counterspecification and counterspecification.prefix == no then
--- return cd, false, "current spec blocks prefix"
--- end
--- -- stored preferences (not used)
--- if cd.prefix == no then
--- return cd, false, "entry blocks prefix"
--- end
--- -- sectioning
--- -- if sectiondata.prefix == no then
--- -- return false, false, "sectiondata blocks prefix"
--- -- end
--- -- final verdict
--- return cd, sectiondata, "okay"
--- end
---
--- function counters.prefixedconverted(name,prefixspec,numberspec)
--- local cd, prefixdata, result = counters.analyze(name,prefixspec)
--- if cd then
--- if prefixdata then
--- sections.typesetnumber(prefixdata,"prefix",prefixspec or false,cd or false)
--- end
--- counters.converted(name,numberspec)
--- end
--- end
+if not modules then modules = { } end modules ['strc-num'] = {
+ version = 1.001,
+ comment = "companion to strc-num.mkiv",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local format = string.format
+local next, type = next, type
+local min, max = math.min, math.max
+local texcount, texsetcount = tex.count, tex.setcount
+
+-- Counters are managed here. They can have multiple levels which makes it easier to synchronize
+-- them. Synchronization is sort of special anyway, as it relates to document structuring.
+
+local allocate = utilities.storage.allocate
+local setmetatableindex = table.setmetatableindex
+
+local trace_counters = false trackers.register("structures.counters", function(v) trace_counters = v end)
+local report_counters = logs.reporter("structure","counters")
+
+local structures = structures
+local helpers = structures.helpers
+local sections = structures.sections
+local counters = structures.counters
+local documents = structures.documents
+
+local variables = interfaces.variables
+local v_start = variables.start
+local v_page = variables.page
+local v_reverse = variables.reverse
+local v_first = variables.first
+local v_next = variables.next
+local v_previous = variables.previous
+local v_prev = variables.prev
+local v_last = variables.last
+----- v_no = variables.no
+local v_backward = variables.backward
+local v_forward = variables.forward
+----- v_subs = variables.subs or "subs"
+
+-- states: start stop none reset
+
+-- specials are used for counters that are set and incremented in special ways, like
+-- pagecounters that get this treatment in the page builder
+
+counters.specials = counters.specials or { }
+local counterspecials = counters.specials
+
+local counterranges, tbs = { }, 0
+
+counters.collected = allocate()
+counters.tobesaved = counters.tobesaved or { }
+counters.data = counters.data or { }
+
+storage.register("structures/counters/data", counters.data, "structures.counters.data")
+storage.register("structures/counters/tobesaved", counters.tobesaved, "structures.counters.tobesaved")
+
+local collected = counters.collected
+local tobesaved = counters.tobesaved
+local counterdata = counters.data
+
+local function initializer() -- not really needed
+ collected = counters.collected
+ tobesaved = counters.tobesaved
+ counterdata = counters.data
+end
+
+local function finalizer()
+ for name, cd in next, counterdata do
+ local cs = tobesaved[name]
+ local data = cd.data
+ for i=1,#data do
+ local d = data[i]
+ local r = d.range
+ cs[i][r] = d.number
+ d.range = r + 1
+ end
+ end
+end
+
+job.register('structures.counters.collected', tobesaved, initializer, finalizer)
+
+local constructor = { -- maybe some day we will provide an installer for more variants
+
+ last = function(t,name,i)
+ local cc = collected[name]
+ local stop = (cc and cc[i] and cc[i][t.range]) or 0 -- stop is available for diagnostics purposes only
+ t.stop = stop
+ if t.offset then
+ return stop - t.step
+ else
+ return stop
+ end
+ end,
+
+ first = function(t,name,i)
+ local start = t.start
+ if start > 0 then
+ return start -- brrr
+ elseif t.offset then
+ return start + t.step + 1
+ else
+ return start + 1
+ end
+ end,
+
+ prev = function(t,name,i)
+ return max(t.first,t.number-1) -- todo: step
+ end,
+
+ previous = function(t,name,i)
+ return max(t.first,t.number-1) -- todo: step
+ end,
+
+ next = function(t,name,i)
+ return min(t.last,t.number+1) -- todo: step
+ end,
+
+ backward =function(t,name,i)
+ if t.number - 1 < t.first then
+ return t.last
+ else
+ return t.previous
+ end
+ end,
+
+ forward = function(t,name,i)
+ if t.number + 1 > t.last then
+ return t.first
+ else
+ return t.next
+ end
+ end,
+
+ subs = function(t,name,i)
+ local cc = collected[name]
+ t.subs = (cc and cc[i+1] and cc[i+1][t.range]) or 0
+ return t.subs
+ end,
+
+}
+
+local function dummyconstructor(t,name,i)
+ return nil -- was 0, but that is fuzzy in testing for e.g. own
+end
+
+setmetatableindex(constructor,function(t,k)
+ if trace_counters then
+ report_counters("unknown constructor %a",k)
+ end
+ return dummyconstructor
+end)
+
+local function enhance()
+ for name, cd in next, counterdata do
+ local data = cd.data
+ for i=1,#data do
+ local ci = data[i]
+ setmetatableindex(ci, function(t,s) return constructor[s](t,name,i) end)
+ end
+ end
+ enhance = nil
+end
+
+local function allocate(name,i) -- can be metatable
+ local cd = counterdata[name]
+ if not cd then
+ cd = {
+ level = 1,
+ -- block = "", -- todo
+ numbers = nil,
+ state = v_start, -- true
+ data = { },
+ saved = { },
+ }
+ tobesaved[name] = { }
+ counterdata[name] = cd
+ end
+ cd = cd.data
+ local ci = cd[i]
+ if not ci then
+ ci = {
+ number = 0,
+ start = 0,
+ saved = 0,
+ step = 1,
+ range = 1,
+ offset = false,
+ stop = 0, -- via metatable: last, first, stop only for tracing
+ }
+ setmetatableindex(ci, function(t,s) return constructor[s](t,name,i) end)
+ cd[i] = ci
+ tobesaved[name][i] = { }
+ else
+ if enhance then enhance() end -- not stored in bytecode
+ end
+ return ci
+end
+
+function counters.record(name,i)
+ return allocate(name,i or 1)
+end
+
+local function savevalue(name,i)
+ if name then
+ local cd = counterdata[name].data[i]
+ local cs = tobesaved[name][i]
+ local cc = collected[name]
+ if trace_counters then
+ report_counters("action %a, counter %s, value %s","save",name,cd.number)
+ end
+ local cr = cd.range
+ local old = (cc and cc[i] and cc[i][cr]) or 0
+ local number = cd.number
+ if cd.method == v_page then
+ -- we can be one page ahead
+ number = number - 1
+ end
+ cs[cr] = (number >= 0) and number or 0
+ cd.range = cr + 1
+ return old
+ else
+ return 0
+ end
+end
+
+function counters.define(specification)
+ local name = specification.name
+ if name and name ~= "" then
+ -- todo: step
+ local d = allocate(name,1)
+ d.start = tonumber(specification.start) or 0
+ d.state = v_state or ""
+ local counter = specification.counter
+ if counter and counter ~= "" then
+ d.counter = counter -- only for special purposes, cannot be false
+ d.method = specification.method -- frozen at define time
+ end
+ end
+end
+
+function counters.raw(name)
+ return counterdata[name]
+end
+
+function counters.compact(name,level,onlynumbers)
+ local cd = counterdata[name]
+ if cd then
+ local data = cd.data
+ local compact = { }
+ for i=1,level or #data do
+ local d = data[i]
+ if d.number ~= 0 then
+ compact[i] = (onlynumbers and d.number) or d
+ end
+ end
+ return compact
+ end
+end
+
+-- depends on when incremented, before or after (driven by d.offset)
+
+function counters.previous(name,n)
+ return allocate(name,n).previous
+end
+
+function counters.next(name,n)
+ return allocate(name,n).next
+end
+
+counters.prev = counters.previous
+
+function counters.currentvalue(name,n)
+ return allocate(name,n).number
+end
+
+function counters.first(name,n)
+ return allocate(name,n).first
+end
+
+function counters.last(name,n)
+ return allocate(name,n).last
+end
+
+function counters.subs(name,n)
+ return counterdata[name].data[n].subs or 0
+end
+
+local function setvalue(name,tag,value)
+ local cd = counterdata[name]
+ if cd then
+ cd[tag] = value
+ end
+end
+
+counters.setvalue = setvalue
+
+function counters.setstate(name,value) -- true/false
+ value = variables[value]
+ if value then
+ setvalue(name,"state",value)
+ end
+end
+
+function counters.setlevel(name,value)
+ setvalue(name,"level",value)
+end
+
+function counters.setoffset(name,value)
+ setvalue(name,"offset",value)
+end
+
+local function synchronize(name,d)
+ local dc = d.counter
+ if dc then
+ if trace_counters then
+ report_counters("action %a, name %a, counter %a, value %a","synchronize",name,dc,d.number)
+ end
+ texsetcount("global",dc,d.number)
+ end
+ local cs = counterspecials[name]
+ if cs then
+ if trace_counters then
+ report_counters("action %a, name %a, counter %a","synccommand",name,dc)
+ end
+ cs(name)
+ end
+end
+
+local function reset(name,n)
+ local cd = counterdata[name]
+ if cd then
+ for i=n or 1,#cd.data do
+ local d = cd.data[i]
+ savevalue(name,i)
+ local number = d.start or 0
+ d.number = number
+ d.own = nil
+ if trace_counters then
+ report_counters("action %a, name %a, sub %a, value %a","reset",name,i,number)
+ end
+ synchronize(name,d)
+ end
+ cd.numbers = nil
+ else
+ end
+end
+
+local function set(name,n,value)
+ local cd = counterdata[name]
+ if cd then
+ local d = allocate(name,n)
+ local number = value or 0
+ d.number = number
+ d.own = nil
+ if trace_counters then
+ report_counters("action %a, name %a, sub %a, value %a","set",name,"no",number)
+ end
+ synchronize(name,d)
+ end
+end
+
+local function check(name,data,start,stop)
+ for i=start or 1,stop or #data do
+ local d = data[i]
+ savevalue(name,i)
+ local number = d.start or 0
+ d.number = number
+ d.own = nil
+ if trace_counters then
+ report_counters("action %a, name %a, sub %a, value %a","check",name,i,number)
+ end
+ synchronize(name,d)
+ end
+end
+
+counters.reset = reset
+counters.set = set
+
+function counters.setown(name,n,value)
+ local cd = counterdata[name]
+ if cd then
+ local d = allocate(name,n)
+ d.own = value
+ d.number = (d.number or d.start or 0) + (d.step or 0)
+ local level = cd.level
+ if not level or level == -1 then
+ -- -1 is signal that we reset manually
+ elseif level > 0 or level == -3 then
+ check(name,d,n+1)
+ elseif level == 0 then
+ -- happens elsewhere, check this for block
+ end
+ synchronize(name,d)
+ end
+end
+
+function counters.restart(name,n,newstart,noreset)
+ local cd = counterdata[name]
+ if cd then
+ newstart = tonumber(newstart)
+ if newstart then
+ local d = allocate(name,n)
+ d.start = newstart
+ if not noreset then
+ reset(name,n) -- hm
+ end
+ end
+ end
+end
+
+function counters.save(name) -- or just number
+ local cd = counterdata[name]
+ if cd then
+ table.insert(cd.saved,table.copy(cd.data))
+ end
+end
+
+function counters.restore(name)
+ local cd = counterdata[name]
+ if cd and cd.saved then
+ cd.data = table.remove(cd.saved)
+ end
+end
+
+function counters.add(name,n,delta)
+ local cd = counterdata[name]
+ if cd and (cd.state == v_start or cd.state == "") then
+ local data = cd.data
+ local d = allocate(name,n)
+ d.number = (d.number or d.start or 0) + delta*(d.step or 0)
+ -- d.own = nil
+ local level = cd.level
+ if not level or level == -1 then
+ -- -1 is signal that we reset manually
+ if trace_counters then
+ report_counters("action %a, name %a, sub %a, how %a","add",name,"no","no checking")
+ end
+ elseif level == -2 then
+ -- -2 is signal that we work per text
+ if trace_counters then
+ report_counters("action %a, name %a, sub %a, how %a","add",name,"text","checking")
+ end
+ check(name,data,n+1)
+ elseif level > 0 or level == -3 then
+ -- within countergroup
+ if trace_counters then
+ report_counters("action %a, name %a, sub %a, how %a","add",name,level,"checking within group")
+ end
+ check(name,data,n+1)
+ elseif level == 0 then
+ -- happens elsewhere
+ if trace_counters then
+ report_counters("action %a, name %a, sub %a, how %a","add",name,level,"no checking")
+ end
+ else
+ if trace_counters then
+ report_counters("action %a, name %a, sub %a, how %a","add",name,"unknown","no checking")
+ end
+ end
+ synchronize(name,d)
+ return d.number -- not needed
+ end
+ return 0
+end
+
+function counters.check(level)
+ for name, cd in next, counterdata do
+ if level > 0 and cd.level == -3 then -- could become an option
+ if trace_counters then
+ report_counters("action %a, name %a, sub %a, detail %a","reset",name,level,"head")
+ end
+ reset(name)
+ elseif cd.level == level then
+ if trace_counters then
+ report_counters("action %a, name %a, sub %a, detail %a","reset",name,level,"normal")
+ end
+ reset(name)
+ end
+ end
+end
+
+local function get(name,n,key)
+ local d = allocate(name,n)
+ d = d and d[key]
+ if not d then
+ return 0
+ elseif type(d) == "function" then
+ return d()
+ else
+ return d
+ end
+end
+
+counters.get = get
+
+function counters.value(name,n) -- what to do with own
+ return get(name,n or 1,'number') or 0
+end
+
+function counters.converted(name,spec) -- name can be number and reference to storage
+ local cd
+ if type(name) == "number" then
+ cd = specials.retrieve("counter",name)
+ cd = cd and cd.counter
+ else
+ cd = counterdata[name]
+ end
+ if cd then
+ local spec = spec or { }
+ local numbers, ownnumbers = { }, { }
+ local reverse = spec.order == v_reverse
+ local kind = spec.type or "number"
+ local data = cd.data
+ for k=1,#data do
+ local v = data[k]
+ -- somewhat messy, what if subnr? only last must honour kind?
+ local vn
+ if v.own then
+ numbers[k], ownnumbers[k] = v.number, v.own
+ else
+ if kind == v_first then
+ vn = v.first
+ elseif kind == v_next then
+ vn = v.next
+ elseif kind == v_prev or kind == v_previous then
+ vn = v.prev
+ elseif kind == v_last then
+ vn = v.last
+ else
+ vn = v.number
+ if reverse then
+ local vf = v.first
+ local vl = v.last
+ if vl > 0 then
+ -- vn = vl - vn + 1 + vf
+ vn = vl - vn + vf -- see testbed for test
+ end
+ end
+ end
+ numbers[k], ownnumbers[k] = vn or v.number, nil
+ end
+ end
+ cd.numbers = numbers
+ cd.ownnumbers = ownnumbers
+ sections.typesetnumber(cd,'number',spec)
+ cd.numbers = nil
+ cd.ownnumbers = nil
+ end
+end
+
+-- interfacing
+
+commands.definecounter = counters.define
+commands.setcounter = counters.set
+commands.setowncounter = counters.setown
+commands.resetcounter = counters.reset
+commands.restartcounter = counters.restart
+commands.savecounter = counters.save
+commands.restorecounter = counters.restore
+commands.addcounter = counters.add
+
+commands.rawcountervalue = function(...) context(counters.raw (...)) end
+commands.countervalue = function(...) context(counters.value (...)) end
+commands.lastcountervalue = function(...) context(counters.last (...)) end
+commands.firstcountervalue = function(...) context(counters.first (...)) end
+commands.nextcountervalue = function(...) context(counters.next (...)) end
+commands.prevcountervalue = function(...) context(counters.previous(...)) end
+commands.subcountervalues = function(...) context(counters.subs (...)) end
+
+function commands.showcounter(name)
+ local cd = counterdata[name]
+ if cd then
+ context("[%s:",name)
+ local data = cd.data
+ for i=1,#data do
+ local d = data[i]
+ context(" (%s: %s,%s,%s s:%s r:%s)",i,d.start or 0,d.number or 0,d.last,d.step or 0,d.range or 0)
+ end
+ context("]")
+ end
+end
+
+function commands.doifelsecounter(name) commands.doifelse(counterdata[name]) end
+function commands.doifcounter (name) commands.doif (counterdata[name]) end
+function commands.doifnotcounter (name) commands.doifnot (counterdata[name]) end
+
+function commands.incrementedcounter(...) context(counters.add(...)) end
+
+function commands.checkcountersetup(name,level,start,state)
+ counters.restart(name,1,start,true) -- no reset
+ counters.setstate(name,state)
+ counters.setlevel(name,level)
+ sections.setchecker(name,level,counters.reset)
+end
+
+-- -- move to strc-pag.lua
+--
+-- function counters.analyze(name,counterspecification)
+-- local cd = counterdata[name]
+-- -- safeguard
+-- if not cd then
+-- return false, false, "no counter data"
+-- end
+-- -- section data
+-- local sectiondata = sections.current()
+-- if not sectiondata then
+-- return cd, false, "not in section"
+-- end
+-- local references = sectiondata.references
+-- if not references then
+-- return cd, false, "no references"
+-- end
+-- local section = references.section
+-- if not section then
+-- return cd, false, "no section"
+-- end
+-- sectiondata = sections.collected[references.section]
+-- if not sectiondata then
+-- return cd, false, "no section data"
+-- end
+-- -- local preferences
+-- local no = v_no
+-- if counterspecification and counterspecification.prefix == no then
+-- return cd, false, "current spec blocks prefix"
+-- end
+-- -- stored preferences (not used)
+-- if cd.prefix == no then
+-- return cd, false, "entry blocks prefix"
+-- end
+-- -- sectioning
+-- -- if sectiondata.prefix == no then
+-- -- return false, false, "sectiondata blocks prefix"
+-- -- end
+-- -- final verdict
+-- return cd, sectiondata, "okay"
+-- end
+--
+-- function counters.prefixedconverted(name,prefixspec,numberspec)
+-- local cd, prefixdata, result = counters.analyze(name,prefixspec)
+-- if cd then
+-- if prefixdata then
+-- sections.typesetnumber(prefixdata,"prefix",prefixspec or false,cd or false)
+-- end
+-- counters.converted(name,numberspec)
+-- end
+-- end
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