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|
if not modules then modules = { } end modules ['font-sol'] = { -- this was: node-spl
version = 1.001,
comment = "companion to font-sol.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- We can speed this up.
-- This module is dedicated to the oriental tex project and for
-- the moment is too experimental to be publicly supported.
--
-- We could cache solutions: say that we store the featureset and
-- all 'words' -> replacement ... so we create a large solution
-- database (per font)
--
-- This module can be optimized by using a dedicated dynamics handler
-- but I'll only do that when the rest of the code is stable.
--
-- Todo: bind setups to paragraph.
local gmatch, concat, format, remove = string.gmatch, table.concat, string.format, table.remove
local next, tostring, tonumber = next, tostring, tonumber
local insert, remove = table.insert, table.remove
local getrandom = utilities.randomizer.get
local utilities, logs, statistics, fonts, trackers = utilities, logs, statistics, fonts, trackers
local interfaces, commands, attributes = interfaces, commands, attributes
local nodes, node, tex = nodes, node, tex
local trace_split = false trackers.register("builders.paragraphs.solutions.splitters.splitter", function(v) trace_split = v end)
local trace_optimize = false trackers.register("builders.paragraphs.solutions.splitters.optimizer", function(v) trace_optimize = v end)
local trace_colors = false trackers.register("builders.paragraphs.solutions.splitters.colors", function(v) trace_colors = v end)
local trace_goodies = false trackers.register("fonts.goodies", function(v) trace_goodies = v end)
local report_solutions = logs.reporter("fonts","solutions")
local report_splitters = logs.reporter("fonts","splitters")
local report_optimizers = logs.reporter("fonts","optimizers")
local variables = interfaces.variables
local v_normal = variables.normal
local v_reverse = variables.reverse
local v_preroll = variables.preroll
local v_random = variables.random
local v_split = variables.split
local implement = interfaces.implement
local settings_to_array = utilities.parsers.settings_to_array
local settings_to_hash = utilities.parsers.settings_to_hash
local tasks = nodes.tasks
local nuts = nodes.nuts
local getfield = nuts.getfield
local getnext = nuts.getnext
local getprev = nuts.getprev
local getid = nuts.getid
local getattr = nuts.getattr
local getfont = nuts.getfont
local getsubtype = nuts.getsubtype
local getlist = nuts.getlist
local getdirection = nuts.getdirection
local getwidth = nuts.getwidth
local getdata = nuts.getdata
local getboxglue = nuts.getboxglue
local setattr = nuts.setattr
local setlink = nuts.setlink
local setnext = nuts.setnext
local setlist = nuts.setlist
local find_node_tail = nuts.tail
local flush_node = nuts.flush_node
local flush_node_list = nuts.flush_list
local copy_node_list = nuts.copy_list
local hpack_nodes = nuts.hpack
local insert_node_before = nuts.insert_before
local insert_node_after = nuts.insert_after
local protect_glyphs = nuts.protect_glyphs
local nextnode = nuts.traversers.next
local nexthlist = nuts.traversers.hlist
local nextwhatsit = nuts.traversers.whatsit
local repack_hlist = nuts.repackhlist
local nodes_to_utf = nodes.listtoutf
----- protect_glyphs = nodes.handlers.protectglyphs
local setnodecolor = nodes.tracers.colors.set
local nodecodes = nodes.nodecodes
local whatsitcodes = nodes.whatsitcodes
local kerncodes = nodes.kerncodes
local glyph_code = nodecodes.glyph
local disc_code = nodecodes.disc
local kern_code = nodecodes.kern
local hlist_code = nodecodes.hlist
local dir_code = nodecodes.dir
local localpar_code = nodecodes.localpar
local whatsit_code = nodecodes.whatsit
local fontkern_code = kerncodes.fontkern
local userdefinedwhatsit_code = whatsitcodes.userdefined
local nodepool = nuts.pool
local usernodeids = nodepool.userids
local new_direction = nodepool.direction
local new_usernumber = nodepool.usernumber
local new_glue = nodepool.glue
local new_leftskip = nodepool.leftskip
local starttiming = statistics.starttiming
local stoptiming = statistics.stoptiming
----- process_characters = nodes.handlers.characters
local inject_kerns = nodes.injections.handler
local fonthashes = fonts.hashes
local setfontdynamics = fonthashes.setdynamics
local texsetattribute = tex.setattribute
local unsetvalue = attributes.unsetvalue
local parbuilders = builders.paragraphs
parbuilders.solutions = parbuilders.solutions or { }
local parsolutions = parbuilders.solutions
parsolutions.splitters = parsolutions.splitters or { }
local splitters = parsolutions.splitters
local solutions = { } -- attribute sets
local registered = { } -- backmapping
splitters.registered = registered
local a_split = attributes.private('splitter')
local preroll = true
local criterium = 0
local randomseed = nil
local optimize = nil -- set later
local variant = v_normal
local splitwords = true
local cache = { }
local variants = { }
local max_less = 0
local max_more = 0
local stack = { }
local dummy = {
attribute = unsetvalue,
randomseed = 0,
criterium = 0,
preroll = false,
optimize = nil,
splitwords = false,
variant = v_normal,
}
local function checksettings(r,settings)
local s = r.settings
local method = settings_to_array(settings.method or "")
local optimize, preroll, splitwords
for i=1,#method do
local k = method[i]
if k == v_preroll then
preroll = true
elseif k == v_split then
splitwords = true
elseif variants[k] then
variant = k
optimize = variants[k] -- last one wins
end
end
r.randomseed = tonumber(settings.randomseed) or s.randomseed or r.randomseed or 0
r.criterium = tonumber(settings.criterium ) or s.criterium or r.criterium or 0
r.preroll = preroll or false
r.splitwords = splitwords or false
r.optimize = optimize or s.optimize or r.optimize or variants[v_normal]
end
local function pushsplitter(name,settings)
local r = name and registered[name]
if r then
if settings then
checksettings(r,settings)
end
else
r = dummy
end
insert(stack,r)
-- brr
randomseed = r.randomseed or 0
criterium = r.criterium or 0
preroll = r.preroll or false
optimize = r.optimize or nil
splitwords = r.splitwords or nil
--
texsetattribute(a_split,r.attribute)
return #stack
end
local function popsplitter()
remove(stack)
local n = #stack
local r = stack[n] or dummy
--
randomseed = r.randomseed or 0
criterium = r.criterium or 0
preroll = r.preroll or false
optimize = r.optimize or nil
--
texsetattribute(a_split,r.attribute)
return n
end
local contextsetups = fonts.specifiers.contextsetups
local function convert(featuresets,name,list)
if list then
local numbers = { }
local nofnumbers = 0
for i=1,#list do
local feature = list[i]
local fs = featuresets[feature]
local fn = fs and fs.number
if not fn then
-- fall back on global features
fs = contextsetups[feature]
fn = fs and fs.number
end
if fn then
nofnumbers = nofnumbers + 1
numbers[nofnumbers] = fn
if trace_goodies or trace_optimize then
report_solutions("solution %a of %a uses feature %a with number %s",i,name,feature,fn)
end
else
report_solutions("solution %a of %a has an invalid feature reference %a",i,name,feature)
end
end
return nofnumbers > 0 and numbers
end
end
local function initialize(goodies)
local solutions = goodies.solutions
if solutions then
local featuresets = goodies.featuresets
local goodiesname = goodies.name
if trace_goodies or trace_optimize then
report_solutions("checking solutions in %a",goodiesname)
end
for name, set in next, solutions do
set.less = convert(featuresets,name,set.less)
set.more = convert(featuresets,name,set.more)
end
end
end
fonts.goodies.register("solutions",initialize)
function splitters.define(name,settings)
local goodies = settings.goodies
local solution = settings.solution
local less = settings.less
local more = settings.more
local less_set, more_set
local l = less and settings_to_array(less)
local m = more and settings_to_array(more)
if goodies then
goodies = fonts.goodies.load(goodies) -- also in tfmdata
if goodies then
local featuresets = goodies.featuresets
local solution = solution and goodies.solutions[solution]
if l and #l > 0 then
less_set = convert(featuresets,name,less) -- take from settings
else
less_set = solution and solution.less -- take from goodies
end
if m and #m > 0 then
more_set = convert(featuresets,name,more) -- take from settings
else
more_set = solution and solution.more -- take from goodies
end
end
else
if l then
local n = #less_set
for i=1,#l do
local ss = contextsetups[l[i]]
if ss then
n = n + 1
less_set[n] = ss.number
end
end
end
if m then
local n = #more_set
for i=1,#m do
local ss = contextsetups[m[i]]
if ss then
n = n + 1
more_set[n] = ss.number
end
end
end
end
if trace_optimize then
report_solutions("defining solutions %a, less %a, more %a",name,concat(less_set or {}," "),concat(more_set or {}," "))
end
local nofsolutions = #solutions + 1
local t = {
solution = solution,
less = less_set or { },
more = more_set or { },
settings = settings, -- for tracing
attribute = nofsolutions,
}
solutions[nofsolutions] = t
registered[name] = t
return nofsolutions
end
local nofwords, noftries, nofadapted, nofkept, nofparagraphs = 0, 0, 0, 0, 0
local splitter_one = usernodeids["splitters.one"]
local splitter_two = usernodeids["splitters.two"]
local a_word = attributes.private('word')
local encapsulate = false
directives.register("builders.paragraphs.solutions.splitters.encapsulate", function(v)
encapsulate = v
end)
function splitters.split(head) -- best also pass the direction
local current, r2l, start, stop, attribute = head, false, nil, nil, 0
cache, max_less, max_more = { }, 0, 0
local function flush() -- we can move this
local font = getfont(start)
local last = getnext(stop)
local list = last and copy_node_list(start,stop) or copy_node_list(start)
local n = #cache + 1
if encapsulate then
local user_one = new_usernumber(splitter_one,n)
local user_two = new_usernumber(splitter_two,n)
head, start = insert_node_before(head,start,user_one)
insert_node_after(head,stop,user_two)
else
local current = start
while true do
setattr(current,a_word,n)
if current == stop then
break
else
current = getnext(current)
end
end
end
if r2l then
local dirnode = new_direction(righttoleft) -- brrr, we don't pop ... to be done (when used at all)
setlink(dirnode,list)
list = dirnode
end
local c = {
original = list,
attribute = attribute,
-- direction = rlmode,
font = font
}
if trace_split then
report_splitters("cached %4i: font %a, attribute %a, direction %a, word %a",
n, font, attribute, nodes_to_utf(list,true), r2l and "r2l" or "l2r")
end
cache[n] = c
local solution = solutions[attribute]
local l = #solution.less
local m = #solution.more
if l > max_less then max_less = l end
if m > max_more then max_more = m end
start, stop = nil, nil
end
while current do -- also ischar
local next = getnext(current)
local id = getid(current)
if id == glyph_code then
if getsubtype(current) < 256 then
local a = getattr(current,a_split)
if not a then
start, stop = nil, nil
elseif not start then
start, stop, attribute = current, current, a
elseif a ~= attribute then
start, stop = nil, nil
else
stop = current
end
end
elseif id == disc_code then
if splitwords then
if start then
flush()
end
elseif start and next and getid(next) == glyph_code and getsubtype(next) < 256 then
-- beware: we can cross future lines
stop = next
else
start, stop = nil, nil
end
elseif id == dir_code then
-- not tested (to be done by idris when font is ready)
if start then
flush()
end
local direction, pop = getdirection(current)
r2l = not pop and direction == righttoleft
elseif id == localpar_code and getsubtype(current) == 0 then
if start then
flush() -- very unlikely as this starts a paragraph
end
local direction = getdirection(current)
r2l = direction == righttoleft or direction == "TRT" -- for old times sake
else
if start then
flush()
end
end
current = next
end
if start then
flush()
end
nofparagraphs = nofparagraphs + 1
nofwords = nofwords + #cache
return head
end
local function collect_words(list) -- can be made faster for attributes
local words, w, word = { }, 0, nil
if encapsulate then
for current, subtype in nextwhatsit, list do
if subtype == userdefinedwhatsit_code then -- hm
local user_id = getfield(current,"user_id")
if user_id == splitter_one then
word = { getdata(current), current, current }
w = w + 1
words[w] = word
elseif user_id == splitter_two then
if word then
word[3] = current
else
-- something is wrong
end
end
end
end
else
local current, first, last, index = list, nil, nil, nil
while current do
-- todo: disc and kern
local id = getid(current)
if id == glyph_code or id == disc_code then
local a = getattr(current,a_word)
if a then
if a == index then
-- same word
last = current
elseif index then
w = w + 1
words[w] = { index, first, last }
first = current
last = current
index = a
elseif first then
last = current
index = a
else
first = current
last = current
index = a
end
elseif index then
if first then
w = w + 1
words[w] = { index, first, last }
end
index = nil
first = nil
elseif trace_split then
if id == disc_code then
report_splitters("skipped: disc node")
else
report_splitters("skipped: %C",current.char)
end
end
elseif id == kern_code and getsubtype(current) == fontkern_code then
if first then
last = current
else
first = current
last = current
end
elseif index then
w = w + 1
words[w] = { index, first, last }
index = nil
first = nil
if id == disc_code then
if trace_split then
report_splitters("skipped: disc node")
end
end
end
current = getnext(current)
end
if index then
w = w + 1
words[w] = { index, first, last }
end
if trace_split then
for i=1,#words do
local w = words[i]
local n, f, l = w[1], w[2], w[3]
local c = cache[n]
if c then
report_splitters("found %4i: word %a, cached %a",n,nodes_to_utf(f,true,true,l),nodes_to_utf(c.original,true))
else
report_splitters("found %4i: word %a, not in cache",n,nodes_to_utf(f,true,true,l))
end
end
end
end
return words, list -- check for empty (elsewhere)
end
-- we could avoid a hpack but hpack is not that slow
local function doit(word,list,best,width,badness,line,set,listdir)
local changed = 0
local n = word[1]
local found = cache[n]
if found then
local h, t
if encapsulate then
h = getnext(word[2]) -- head of current word
t = getprev(word[3]) -- tail of current word
else
h = word[2]
t = word[3]
end
if splitwords then
-- there are no lines crossed in a word
else
local ok = false
local c = h
while c do
if c == t then
ok = true
break
else
c = getnext(c)
end
end
if not ok then
report_solutions("skipping hyphenated word (for now)")
-- todo: mark in words as skipped, saves a bit runtime
return false, changed
end
end
local original = found.original
local attribute = found.attribute
local solution = solutions[attribute]
local features = solution and solution[set]
if features then
local featurenumber = features[best] -- not ok probably
if featurenumber then
noftries = noftries + 1
local first = copy_node_list(original)
if not trace_colors then
for n in nextnode, first do -- maybe fast force so no attr needed
setattr(n,0,featurenumber) -- this forces dynamics
end
elseif set == "less" then
for n in nextnode, first do
setnodecolor(n,"font:isol") -- yellow
setattr(n,0,featurenumber)
end
else
for n in nextnode, first do
setnodecolor(n,"font:medi") -- green
setattr(n,0,featurenumber)
end
end
local font = found.font
local setdynamics = setfontdynamics[font]
if setdynamics then
local processes = setdynamics[featurenumber]
for i=1,#processes do -- often more than 1
first = processes[i](first,font,featurenumber)
end
else
report_solutions("fatal error, no dynamics for font %a",font)
end
first = inject_kerns(first)
if getid(first) == whatsit_code then
local temp = first
first = getnext(first)
flush_node(temp)
end
local last = find_node_tail(first)
-- replace [u]h->t by [u]first->last
local prev = getprev(h)
local next = getnext(t)
setlink(prev,first)
if next then
setlink(last,next)
end
-- check new pack
local temp, b = repack_hlist(list,width,'exactly',listdir)
if b > badness then
if trace_optimize then
report_optimizers("line %a, set %a, badness before %a, after %a, criterium %a, verdict %a",line,set or "?",badness,b,criterium,"quit")
end
-- remove last insert
setlink(prev,h)
if next then
setlink(t,next)
else
setnext(t)
end
setnext(last)
flush_node_list(first)
else
if trace_optimize then
report_optimizers("line %a, set %a, badness before: %a, after %a, criterium %a, verdict %a",line,set or "?",badness,b,criterium,"continue")
end
-- free old h->t
setnext(t)
flush_node_list(h) -- somehow fails
if not encapsulate then
word[2] = first
word[3] = last
end
changed, badness = changed + 1, b
end
if b <= criterium then
return true, changed
end
end
end
end
return false, changed
end
-- We repeat some code but adding yet another layer of indirectness is not
-- making things better.
variants[v_normal] = function(words,list,best,width,badness,line,set,listdir)
local changed = 0
for i=1,#words do
local done, c = doit(words[i],list,best,width,badness,line,set,listdir)
changed = changed + c
if done then
break
end
end
if changed > 0 then
nofadapted = nofadapted + 1
-- todo: get rid of pack when ok because we already have packed and we only need the last b
local list, b = repack_hlist(list,width,'exactly',listdir)
return list, true, changed, b -- badness
else
nofkept = nofkept + 1
return list, false, 0, badness
end
end
variants[v_reverse] = function(words,list,best,width,badness,line,set,listdir)
local changed = 0
for i=#words,1,-1 do
local done, c = doit(words[i],list,best,width,badness,line,set,listdir)
changed = changed + c
if done then
break
end
end
if changed > 0 then
nofadapted = nofadapted + 1
-- todo: get rid of pack when ok because we already have packed and we only need the last b
local list, b = repack_hlist(list,width,'exactly',listdir)
return list, true, changed, b -- badness
else
nofkept = nofkept + 1
return list, false, 0, badness
end
end
variants[v_random] = function(words,list,best,width,badness,line,set,listdir)
local changed = 0
while #words > 0 do
local done, c = doit(remove(words,getrandom("solution",1,#words)),list,best,width,badness,line,set,listdir)
changed = changed + c
if done then
break
end
end
if changed > 0 then
nofadapted = nofadapted + 1
-- todo: get rid of pack when ok because we already have packed and we only need the last b
local list, b = repack_hlist(list,width,'exactly',listdir)
return list, true, changed, b -- badness
else
nofkept = nofkept + 1
return list, false, 0, badness
end
end
local function show_quality(current,what,line)
local set, order, sign = getboxglue(current)
local amount = set * ((sign == 2 and -1) or 1)
report_optimizers("line %a, category %a, amount %a, set %a, sign %a, how %a, order %a",line,what,amount,set,sign,how,order)
end
function splitters.optimize(head)
if not optimize then
report_optimizers("no optimizer set")
return
end
local nc = #cache
if nc == 0 then
return
end
starttiming(splitters)
local listdir = nil -- todo ! ! !
if randomseed then
math.setrandomseedi(randomseed)
randomseed = nil
end
local line = 0
local tex_hbadness = tex.hbadness
local tex_hfuzz = tex.hfuzz
tex.hbadness = 10000
tex.hfuzz = number.maxdimen
if trace_optimize then
report_optimizers("preroll %a, variant %a, criterium %a, cache size %a",preroll,variant,criterium,nc)
end
for current in nexthlist, head do
line = line + 1
local sign = getfield(current,"glue_sign")
local direction = getdirection(current)
local width = getwidth(current)
local list = getlist(current)
if not encapsulate and getid(list) == glyph_code then
-- nasty .. we always assume a prev being there .. future luatex will always have a leftskip set
-- is this assignment ok ? .. needs checking
list = insert_node_before(list,list,new_leftskip(0)) -- new_glue(0)
setlist(current,list)
end
local temp, badness = repack_hlist(list,width,"exactly",direction) -- it would be nice if the badness was stored in the node
if badness > 0 then
if sign == 0 then
if trace_optimize then
report_optimizers("line %a, badness %a, outcome %a, verdict %a",line,badness,"okay","okay")
end
else
local set, max
if sign == 1 then
if trace_optimize then
report_optimizers("line %a, badness %a, outcome %a, verdict %a",line,badness,"underfull","trying more")
end
set, max = "more", max_more
else
if trace_optimize then
report_optimizers("line %a, badness %a, outcome %a, verdict %a",line,badness,"overfull","trying less")
end
set, max = "less", max_less
end
-- we can keep the best variants
local lastbest, lastbadness = nil, badness
if preroll then
local bb, base
for i=1,max do
if base then
flush_node_list(base)
end
base = copy_node_list(list)
local words = collect_words(base) -- beware: words is adapted
for j=i,max do
local temp, done, changes, b = optimize(words,base,j,width,badness,line,set,dir)
base = temp
if trace_optimize then
report_optimizers("line %a, alternative %a.%a, changes %a, badness %a",line,i,j,changes,b)
end
bb = b
if b <= criterium then
break
end
-- if done then
-- break
-- end
end
if bb and bb > criterium then -- needs checking
if not lastbest then
lastbest, lastbadness = i, bb
elseif bb > lastbadness then
lastbest, lastbadness = i, bb
end
else
break
end
end
flush_node_list(base)
end
local words = collect_words(list)
for best=lastbest or 1,max do
local temp, done, changes, b = optimize(words,list,best,width,badness,line,set,dir)
setlist(current,temp)
if trace_optimize then
report_optimizers("line %a, alternative %a, changes %a, badness %a",line,best,changes,b)
end
if done then
if b <= criterium then -- was == 0
protect_glyphs(list)
break
end
end
end
end
else
if trace_optimize then
report_optimizers("line %a, verdict %a",line,"not bad enough")
end
end
-- we pack inside the outer hpack and that way keep the original wd/ht/dp as bonus
local list = hpack_nodes(getlist(current),width,'exactly',listdir)
setlist(current,list)
end
for i=1,nc do
local ci = cache[i]
flush_node_list(ci.original)
end
cache = { }
tex.hbadness = tex_hbadness
tex.hfuzz = tex_hfuzz
stoptiming(splitters)
end
statistics.register("optimizer statistics", function()
if nofwords > 0 then
local elapsed = statistics.elapsedtime(splitters)
local average = noftries/elapsed
return format("%s words identified in %s paragraphs, %s words retried, %s lines tried, %0.3f seconds used, %s adapted, %0.1f lines per second",
nofwords,nofparagraphs,noftries,nofadapted+nofkept,elapsed,nofadapted,average)
end
end)
-- we could use a stack
local enableaction = tasks.enableaction
local disableaction = tasks.disableaction
local function enable()
enableaction("processors", "builders.paragraphs.solutions.splitters.split")
enableaction("finalizers", "builders.paragraphs.solutions.splitters.optimize")
end
local function disable()
disableaction("processors", "builders.paragraphs.solutions.splitters.split")
disableaction("finalizers", "builders.paragraphs.solutions.splitters.optimize")
end
function splitters.start(name,settings)
if pushsplitter(name,settings) == 1 then
enable()
end
end
function splitters.stop()
if popsplitter() == 0 then
disable()
end
end
function splitters.set(name,settings)
if #stack > 0 then
stack = { }
else
enable()
end
pushsplitter(name,settings) -- sets attribute etc
end
function splitters.reset()
if #stack > 0 then
stack = { }
popsplitter() -- resets attribute etc
disable()
end
end
-- interface
implement {
name = "definefontsolution",
actions = splitters.define,
arguments = {
"string",
{
{ "goodies" },
{ "solution" },
{ "less" },
{ "more" },
}
}
}
implement {
name = "startfontsolution",
actions = splitters.start,
arguments = {
"string",
{
{ "method" },
{ "criterium" },
{ "randomseed" },
}
}
}
implement {
name = "stopfontsolution",
actions = splitters.stop
}
implement {
name = "setfontsolution",
actions = splitters.set,
arguments = {
"string",
{
{ "method" },
{ "criterium" },
{ "randomseed" },
}
}
}
implement {
name = "resetfontsolution",
actions = splitters.reset
}
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