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|
if not modules then modules = { } end modules ['math-act'] = {
version = 1.001,
comment = "companion to math-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- Here we tweak some font properties (if needed). The commented sections
-- have been removed (no longer viable) but can be found in the .lua variant.
local type, next = type, next
local fastcopy, insert, remove = table.fastcopy, table.insert, table.remove
local formatters = string.formatters
local byte = string.byte
local trace_defining = false trackers.register("math.defining", function(v) trace_defining = v end)
local trace_collecting = false trackers.register("math.collecting", function(v) trace_collecting = v end)
local trace_tweaking = false trackers.register("math.tweaks", function(v) trace_tweaking = v end)
local report_math = logs.reporter("mathematics","initializing")
local report_mathtweak = logs.reporter("mathematics","tweak")
local context = context
local commands = commands
local mathematics = mathematics
local texsetdimen = tex.setdimen
local abs = math.abs
local helpers = fonts.helpers
local upcommand = helpers.commands.up
local rightcommand = helpers.commands.right
local charcommand = helpers.commands.char
local prependcommands = helpers.prependcommands
local sequencers = utilities.sequencers
local appendgroup = sequencers.appendgroup
local appendaction = sequencers.appendaction
local fontchars = fonts.hashes.characters
local fontproperties = fonts.hashes.properties
local mathfontparameteractions = sequencers.new {
name = "mathparameters",
arguments = "target,original",
}
appendgroup("mathparameters","before") -- user
appendgroup("mathparameters","system") -- private
appendgroup("mathparameters","after" ) -- user
function fonts.constructors.assignmathparameters(original,target) -- wrong way around
local runner = mathfontparameteractions.runner
if runner then
runner(original,target)
end
end
function mathematics.initializeparameters(target,original)
local mathparameters = original.mathparameters
if mathparameters and next(mathparameters) then
mathparameters = mathematics.dimensions(mathparameters)
if not mathparameters.SpaceBeforeScript then
mathparameters.SpaceBeforeScript = mathparameters.SpaceAfterScript
end
target.mathparameters = mathparameters
end
end
sequencers.appendaction("mathparameters","system","mathematics.initializeparameters")
local how = {
-- RadicalKernBeforeDegree = "horizontal",
-- RadicalKernAfterDegree = "horizontal",
ScriptPercentScaleDown = "unscaled",
ScriptScriptPercentScaleDown = "unscaled",
RadicalDegreeBottomRaisePercent = "unscaled",
NoLimitSupFactor = "unscaled",
NoLimitSubFactor = "unscaled",
}
function mathematics.scaleparameters(target,original)
if not target.properties.math_is_scaled then
local mathparameters = target.mathparameters
if mathparameters and next(mathparameters) then
local parameters = target.parameters
local factor = parameters.factor
local hfactor = parameters.hfactor
local vfactor = parameters.vfactor
for name, value in next, mathparameters do
local h = how[name]
if h == "unscaled" then
-- kept
elseif h == "horizontal" then
value = value * hfactor
elseif h == "vertical"then
value = value * vfactor
else
value = value * factor
end
mathparameters[name] = value
end
end
target.properties.math_is_scaled = true
end
end
-- AccentBaseHeight vs FlattenedAccentBaseHeight
function mathematics.checkaccentbaseheight(target,original)
local mathparameters = target.mathparameters
if mathparameters and mathparameters.AccentBaseHeight == 0 then
mathparameters.AccentBaseHeight = target.parameters.xheight -- needs checking
end
end
function mathematics.checkprivateparameters(target,original)
local mathparameters = target.mathparameters
if mathparameters then
local parameters = target.parameters
local properties = target.properties
if parameters then
local size = parameters.size
if size then
if not mathparameters.FractionDelimiterSize then
mathparameters.FractionDelimiterSize = 1.01 * size
end
if not mathparameters.FractionDelimiterDisplayStyleSize then
mathparameters.FractionDelimiterDisplayStyleSize = 2.40 * size
end
elseif properties then
report_math("invalid parameters in font %a",properties.fullname or "?")
else
report_math("invalid parameters in font")
end
elseif properties then
report_math("no parameters in font %a",properties.fullname or "?")
else
report_math("no parameters and properties in font")
end
end
end
function mathematics.overloadparameters(target,original)
local mathparameters = target.mathparameters
if mathparameters and next(mathparameters) then
local goodies = target.goodies
if goodies then
for i=1,#goodies do
local goodie = goodies[i]
local mathematics = goodie.mathematics
local parameters = mathematics and mathematics.parameters
if parameters then
if trace_defining then
report_math("overloading math parameters in %a @ %p",target.properties.fullname,target.parameters.size)
end
for name, value in next, parameters do
local tvalue = type(value)
if tvalue == "string" then
report_math("comment for math parameter %a: %s",name,value)
else
local oldvalue = mathparameters[name]
local newvalue = oldvalue
if oldvalue then
if tvalue == "number" then
newvalue = value
elseif tvalue == "function" then
newvalue = value(oldvalue,target,original)
elseif not tvalue then
newvalue = nil
end
if trace_defining and oldvalue ~= newvalue then
report_math("overloading math parameter %a: %S => %S",name,oldvalue,newvalue)
end
else
report_math("invalid math parameter %a",name)
end
mathparameters[name] = newvalue
end
end
end
end
end
end
end
-- a couple of predefined tweaks:
local mathtweaks = { }
mathematics.tweaks = mathtweaks
local function report_tweak(fmt,target,original,...)
if fmt then
local metadata = original.shared.rawdata.metadata
local parameters = target.parameters
report_mathtweak(
"%a, size %p, math size %i, %s",
metadata and metadata.fontname or "unknown",
parameters.size or 655360,
parameters.mathsize or 1,
string.formatters[fmt](...)
)
else
report_mathtweak("")
end
end
do
local stepper = utilities.parsers.stepper
local function adapt(target,original,targetcharacters,originalcharacters,k,v,compact,n)
local character = targetcharacters[k]
if character then
local width = character.width
local italic = character.italic
local offsetfactor = v[1] or 1
local widthfactor = v[2] or 1
local italicfactor = v[3] or 1
if width then
character.advance = width -- so advance is oldwidth
character.xoffset = offsetfactor * width
character.width = widthfactor * width
end
if italic then
character.italic = italicfactor * italic
elseif width and italicfactor ~= 1 then
character.italic = italicfactor * width
end
if trace_tweaking then
report_tweak("adapting dimensions of %U ",target,original,k)
end
local smaller = originalcharacters[k].smaller
if compact and smaller and smaller ~= k then
adapt(target,original,targetcharacters,originalcharacters,smaller,v,compact,n+1)
end
else
report_math("no character %U",k)
end
end
function mathtweaks.dimensions(target,original,parameters)
local list = parameters.list
if list then
local targetcharacters = target.characters
local originalcharacters = original.characters
local compact = target.parameters.textscale and true or false
for k, v in next, list do
local t = type(k)
if t == "number" then
adapt(target,original,targetcharacters,originalcharacters,k,v,compact,1)
elseif t == "string" then
stepper(k,function(n) adapt(target,original,targetcharacters,originalcharacters,n,v,compact,1) end)
end
end
end
end
end
do
-- see changed hack in math-fbk
local copytable = table.copy
local nps = fonts.helpers.newprivateslot
local list = {
{ 0x2032, { nps("prime 0x2032 1"), nps("prime 0x2032 2"), nps("prime 0x2032 3") }, 1 },
{ 0x2033, { nps("prime 0x2033 1"), nps("prime 0x2033 2"), nps("prime 0x2033 3") }, 2 },
{ 0x2034, { nps("prime 0x2034 1"), nps("prime 0x2034 2"), nps("prime 0x2034 3") }, 3 },
{ 0x2057, { nps("prime 0x2057 1"), nps("prime 0x2057 2"), nps("prime 0x2057 3") }, 4 },
{ 0x2035, { nps("prime 0x2035 1"), nps("prime 0x2035 2"), nps("prime 0x2035 3") }, 1 },
{ 0x2036, { nps("prime 0x2036 1"), nps("prime 0x2036 2"), nps("prime 0x2036 3") }, 2 },
{ 0x2037, { nps("prime 0x2037 1"), nps("prime 0x2037 2"), nps("prime 0x2037 3") }, 3 },
}
local function copytable(t)
return {
width = t.width,
height = t.height,
depth = t.depth,
index = t.index,
unicode = t.unicode,
}
end
local lastprivate
local function use(target,original,targetcharacters,charcode,private,newheight,scale,fake,keep,count,smaller)
if count == 1 then
lastprivate = private
end
if keep then
if trace_tweaking then
report_tweak("keeping prime %U",target,original,charcode)
end
return
end
if fake and count > 1 then
local olddata = targetcharacters[lastprivate]
if olddata then
-- todo: when keep
local oldheight = scale * olddata.height
local oldwidth = scale * olddata.width
local yoffset = (newheight - oldheight) / scale
local xoffset = fake * oldwidth
local newwidth = oldwidth + (count - 1) * xoffset
targetcharacters[charcode] = {
yoffset = yoffset,
width = newwidth,
height = newheight,
smaller = smaller,
unicode = olddata.unicode,
commands = {
{ "offset", 0, 0, lastprivate, scale, scale },
{ "offset", xoffset, 0, lastprivate, scale, scale },
count > 2 and { "offset", 2 * xoffset, 0, lastprivate, scale, scale } or nil,
count > 3 and { "offset", 3 * xoffset, 0, lastprivate, scale, scale } or nil,
},
}
if trace_tweaking then
report_tweak("faking %U with %i primes",target,original,charcode,count)
end
return
end
end
local olddata = targetcharacters[private]
if olddata then
local oldheight = scale * olddata.height
local oldwidth = scale * olddata.width
local yoffset = (newheight - oldheight) / scale
targetcharacters[charcode] = {
yoffset = yoffset,
width = oldwidth,
height = newheight,
smaller = smaller,
unicode = olddata.unicode,
commands = {
{ "offset", 0, 0, private, scale, scale }
},
}
if trace_tweaking then
report_tweak("fixing prime %U",target,original,charcode)
end
return
end
if trace_tweaking then
report_tweak("unable to fix prime %U",target,original,charcode)
end
end
function mathtweaks.fixprimes(target,original,parameters)
local targetcharacters = target.characters
local targetparameters = target.parameters
local originalcharacters = original.characters
local factor = parameters.factor or 0.85
local scale = parameters.scale or 1
local smaller = parameters.smaller
local fake = parameters.fake
local keep = parameters.keep and targetparameters.mathsize == 1
local newheight = factor * target.mathparameters.AccentBaseHeight
local compact = targetparameters.textscale and true or false
--
lastprivate = false
-- make virtual copies (just all of them, also for tracing)
for i=1,#list do
local entry = list[i]
local count = entry[3]
if not fake or count == 1 then
local c1 = entry[1]
local d1 = targetcharacters[c1]
if d1 then
local pc = entry[2]
local c2 = d1.smaller or c1
local d2 = targetcharacters[c2]
local c3 = d2.smaller or c2
local d3 = targetcharacters[c3]
if smaller then
d1 = d2
d2 = d3
end
targetcharacters[pc[1]] = copytable(d1)
targetcharacters[pc[2]] = copytable(d2)
targetcharacters[pc[3]] = copytable(d3)
end
end
end
-- replace
for i=1,#list do
local entry = list[i]
local count = entry[3]
local c1 = entry[1]
local pc = entry[2]
local s1 = pc[1]
local d1 = targetcharacters[c1]
if compact and d1 then
local c2 = d1.smaller or c1
local d2 = targetcharacters[c2]
local c3 = d2.smaller or c2
local s2 = pc[2]
local s3 = pc[3]
use(target,original,targetcharacters,c1,s1,newheight,scale,fake,keep, count,c2)
use(target,original,targetcharacters,c2,s2,newheight,scale,fake,false,count,c3)
use(target,original,targetcharacters,c3,s3,newheight,scale,fake,false,count)
else
use(target,original,targetcharacters,c1,s1,newheight,scale,fake,keep,count)
end
end
end
end
function mathtweaks.action(target,original,parameters)
local action = parameters.action
if type(action) == "function" then
action(target,original,parameters)
end
end
do
local list = {
{ 0x00A0, "s", 1 }, -- nbsp
{ 0x2000, "q", 1/2 }, -- enquad
{ 0x2001, "q", 1 }, -- emquad
{ 0x2002, "q", 1/2 }, -- enspace
{ 0x2003, "q", 1 }, -- emspace
{ 0x2004, "q", 1/3 }, -- threeperemspace
{ 0x2005, "q", 1/4 }, -- fourperemspace
{ 0x2006, "q", 1/6 }, -- sixperemspace
{ 0x2007, "c", byte('0') }, -- figurespace
{ 0x2008, "c", byte('.') }, -- punctuationspace
{ 0x2009, "q", 1/8 }, -- breakablethinspace
{ 0x200A, "q", 1/8 }, -- hairspace
{ 0x200B, "q", 0 }, -- zerowidthspace
{ 0x202F, "q", 1/8 }, -- narrownobreakspace
{ 0x205F, "s", 1/2 }, -- math thinspace
}
function mathtweaks.checkspacing(target,original,parameters)
local characters = target.characters
local parameters = target.parameters
for i=1,#list do
local entry = list[i]
local unicode = entry[1]
local data = characters[unicode]
if not data then
local method = entry[2]
local fraction = entry[3]
local width = 0
if how == "c" then
width = characters[fraction].width -- char
elseif how == "s" then
width = fraction * parameters.space -- space
else
width = fraction * parameters.quad -- quad
end
if trace_tweaking then
report_tweak("setting width of %U to %p",target,original,unicode,width)
end
characters[unicode] = { width = width }
end
end
end
end
do
local list = {
0x221A,
}
local function fix(target,original,characters,unicode)
local data = characters[unicode]
if data then
local height = data.height or 0
local depth = data.depth or 0
if depth > height then
if trace_tweaking then
report_tweak("swapping height and depth of radical %U",target,original,unicode)
end
data.height = depth
data.depth = height
data.yoffset = depth - height
end
local small = data.smaller
if small then
fix(target,original,characters,small)
end
end
end
function mathtweaks.fixradicals(target,original,parameters)
local characters = target.characters
for i=1,#list do
local unicode = list[i]
fix(target,original,characters,unicode)
end
end
end
do
-- For Ton, who needs the high minus and plus for calculator signs in Dutch
-- school math books.
local list = {
{ 0x207A, 0x002B, true },
{ 0x207B, 0x2212, true },
{ 0x208A, 0x002B, false },
{ 0x208B, 0x2212, false },
}
local function add(target,original,characters,unicode,template,super,baseheight,scale)
if not characters[unicode] then
local origdata = characters[template]
if origdata then
local width = scale * (origdata.width or 0)
local height = scale * (origdata.height or 0)
local depth = scale * (origdata.depth or 0)
local half = - (height + depth) / 2
local offset = super and baseheight/2 or -baseheight/4
characters[unicode] = {
width = width,
height = height + offset,
depth = depth - offset,
unicode = unicode,
commands = {
{ "offset", 0, offset, template, scale, scale }
},
}
if trace_tweaking then
report_tweak("adding script %U scaled %0.3f",target,original,unicode,scale)
end
-- no need for smaller
end
end
end
function mathtweaks.addscripts(target,original,parameters)
local characters = target.characters
local baseheight = target.mathparameters.AccentBaseHeight
local scaledown = parameters.scale or target.mathparameters.ScriptScriptPercentScaleDown / 100
for i=1,#list do
local entry = list[i]
if entry then
add(target,original,characters,entry[1],entry[2],entry[3],baseheight,scaledown)
end
end
end
end
-- do
--
-- local list = {
-- { 0x00AF, 1 },
-- }
--
-- local minint = -2147483647 - 1
--
-- local function fix(target,original,targetcharacters,unicode,factor)
-- local chardata = targetcharacters[unicode]
-- if chardata and factor then
-- local accent = chardata.topaccent
-- if not accent then
-- local width = chardata.width or 0
-- local accent = (tonumber(factor) and factor * width) or (factor and minint)
-- chardata.topaccent = accent
-- if trace_tweaking then
-- report_tweak("fixing accent %U",target,original,unicode)
-- end
-- end
-- end
-- end
--
-- function mathtweaks.fixaccents(target,original,parameters)
-- local targetcharacters = target.characters
-- for i=1,#list do
-- local entry = list[i]
-- if entry then
-- fix(target,original,targetcharacters,entry[1],entry[2])
-- end
-- end
-- end
--
-- end
do
local reported = { }
function mathtweaks.version(target,original,parameters)
local metadata = original.shared.rawdata.metadata
if metadata then
local version = string.strip(metadata.version or "") -- some have trailing spaces
if version then
local expected = parameters.expected
local fontname = metadata.fontname or false
local message = parameters.message
-- version = tonumber(string.match(version,"%d+.%d+"))
if version ~= expected and not reported[fontname] then
report_tweak("version %a found, version %a expected",target,original,version,expected)
elseif trace_tweaking then
report_tweak("version %a found",target,original,version)
end
if message and message ~= "" and not reported[fontname] then
report_tweak()
report_tweak("%s",target,original,message)
report_tweak()
end
reported[fontname] = true
end
end
end
end
local function applytweaks(when,target,original)
local goodies = original.goodies
if goodies then
for i=1,#goodies do
local goodie = goodies[i]
local mathematics = goodie.mathematics
local tweaks = mathematics and mathematics.tweaks
if type(tweaks) == "table" then
tweaks = tweaks[when]
if type(tweaks) == "table" then
if trace_defining then
report_math("tweaking math of %a @ %p (%s)",target.properties.fullname,target.parameters.size,when)
end
for i=1,#tweaks do
local tweak = tweaks[i]
local tvalue = type(tweak)
if type(tweak) == "table" then
local action = mathtweaks[tweak.tweak or ""]
if action then
action(target,original,tweak)
end
end
end
end
end
end
end
end
function mathematics.tweakbeforecopyingfont(target,original)
local mathparameters = target.mathparameters -- why not hasmath
if mathparameters then
applytweaks("beforecopying",target,original)
end
end
function mathematics.tweakaftercopyingfont(target,original)
local mathparameters = target.mathparameters -- why not hasmath
if mathparameters then
applytweaks("aftercopying",target,original)
end
end
sequencers.appendaction("mathparameters","system","mathematics.scaleparameters")
sequencers.appendaction("mathparameters","system","mathematics.checkaccentbaseheight") -- should go in lfg instead
sequencers.appendaction("mathparameters","system","mathematics.checkprivateparameters") -- after scaling !
sequencers.appendaction("mathparameters","system","mathematics.overloadparameters")
sequencers.appendaction("beforecopyingcharacters","system","mathematics.tweakbeforecopyingfont")
sequencers.appendaction("aftercopyingcharacters", "system","mathematics.tweakaftercopyingfont")
-- no, it's a feature now (see good-mth):
--
-- sequencers.appendaction("aftercopyingcharacters", "system","mathematics.overloaddimensions")
-- helpers
local setmetatableindex = table.setmetatableindex
local getfontoffamily = tex.getfontoffamily
local fontcharacters = fonts.hashes.characters
local extensibles = utilities.storage.allocate()
fonts.hashes.extensibles = extensibles
local chardata = characters.data
local extensibles = mathematics.extensibles
-- we use numbers at the tex end (otherwise we could stick to chars)
local e_left = extensibles.left
local e_right = extensibles.right
local e_horizontal = extensibles.horizontal
local e_mixed = extensibles.mixed
local e_unknown = extensibles.unknown
local unknown = { e_unknown, false, false }
local function extensiblecode(font,unicode)
local characters = fontcharacters[font]
local character = characters[unicode]
if not character then
return unknown
end
local first = character.next
local code = unicode
local next = first
while next do
code = next
character = characters[next]
next = character.next
end
local char = chardata[unicode]
if not char then
return unknown
end
if character.hvariants then
if character.vvariants then
return { e_mixed, code, character }
else
local m = char.mathextensible
local e = m and extensibles[m]
return e and { e, code, character } or unknown
end
elseif character.vvariants then
local m = char.mathextensible
local e = m and extensibles[m]
return e and { e, code, character } or unknown
elseif first then
-- assume accent (they seldom stretch .. sizes)
local m = char.mathextensible or char.mathstretch
local e = m and extensibles[m]
return e and { e, code, character } or unknown
else
return unknown
end
end
setmetatableindex(extensibles,function(extensibles,font)
local codes = { }
setmetatableindex(codes, function(codes,unicode)
local status = extensiblecode(font,unicode)
codes[unicode] = status
return status
end)
extensibles[font] = codes
return codes
end)
local function extensiblecode(family,unicode)
return extensibles[getfontoffamily(family or 0)][unicode][1]
end
-- left : [head] ...
-- right : ... [head]
-- horizontal : [head] ... [head]
--
-- abs(right["start"] - right["end"]) | right.advance | characters[right.glyph].width
local function horizontalcode(family,unicode)
local font = getfontoffamily(family or 0)
local data = extensibles[font][unicode]
local kind = data[1]
local loffset = 0
local roffset = 0
if kind == e_left then
local charlist = data[3].hvariants
if charlist then
local left = charlist[1]
loffset = abs((left["start"] or 0) - (left["end"] or 0))
end
elseif kind == e_right then
local charlist = data[3].hvariants
if charlist then
local right = charlist[#charlist]
roffset = abs((right["start"] or 0) - (right["end"] or 0))
end
elseif kind == e_horizontal then
local charlist = data[3].hvariants
if charlist then
local left = charlist[1]
local right = charlist[#charlist]
loffset = abs((left ["start"] or 0) - (left ["end"] or 0))
roffset = abs((right["start"] or 0) - (right["end"] or 0))
end
end
return kind, loffset, roffset
end
mathematics.extensiblecode = extensiblecode
mathematics.horizontalcode = horizontalcode
interfaces.implement { -- can be public with two times "integerargument"
name = "extensiblecode",
arguments = { "integer", "integer" },
actions = { extensiblecode, context }
}
interfaces.implement { -- can be public with two times "integerargument"
name = "horizontalcode",
arguments = { "integer", "integer" },
actions = function(family,unicode)
local kind, loffset, roffset = horizontalcode(family,unicode)
texsetdimen("scratchleftoffset", loffset)
texsetdimen("scratchrightoffset",roffset)
context(kind)
end
}
local stack = { }
function mathematics.registerfallbackid(n,id,name)
if trace_collecting then
report_math("resolved fallback font %i, name %a, id %a, used %a",
n,name,id,fontproperties[id].fontname)
end
stack[#stack][n] = id
end
interfaces.implement { -- will be shared with text
name = "registerfontfallbackid",
arguments = { "integer", "integer", "string" },
actions = mathematics.registerfallbackid,
}
function mathematics.resolvefallbacks(target,specification,fallbacks)
local definitions = fonts.collections.definitions[fallbacks]
if definitions then
local size = specification.size -- target.size
local list = { }
insert(stack,list)
context.pushcatcodes("prt") -- context.unprotect()
for i=1,#definitions do
local definition = definitions[i]
local name = definition.font
local features = definition.features or ""
local size = size * (definition.rscale or 1)
-- compact: size = 655360
context.font_fallbacks_register_math(i,name,features,size)
if trace_collecting then
report_math("registering fallback font %i, name %a, size %a, features %a",i,name,size,features)
end
end
context.popcatcodes()
end
end
function mathematics.finishfallbacks(target,specification,fallbacks)
local list = remove(stack)
if list and #list > 0 then
local definitions = fonts.collections.definitions[fallbacks]
if definitions and #definitions > 0 then
if trace_collecting then
report_math("adding fallback characters to font %a",specification.hash)
end
local definedfont = fonts.definers.internal
local copiedglyph = fonts.handlers.vf.math.copy_glyph
local fonts = target.fonts
local size = specification.size -- target.size
local characters = target.characters
-- compact: size = 655360
if not fonts then
fonts = { }
target.fonts = fonts
end
if #fonts == 0 then
fonts[1] = { id = 0, size = size } -- self, will be resolved later
end
local done = { }
for i=1,#definitions do
local definition = definitions[i]
local name = definition.font
local start = definition.start
local stop = definition.stop
local gaps = definition.gaps
local check = definition.check
local force = definition.force
local rscale = definition.rscale or 1
local offset = definition.offset or start
local id = list[i]
if id then
local index = #fonts + 1
fonts[index] = { id = id, size = size }
local chars = fontchars[id]
local function remap(unic,unicode,gap)
if check and not chars[unicode] then
return
end
if force or (not done[unic] and not characters[unic]) then
if trace_collecting then
report_math("replacing math character %C by %C using vector %a and font id %a for %a%s%s",
unic,unicode,fallbacks,id,fontproperties[id].fontname,check and ", checked",gap and ", gap plugged")
end
characters[unic] = copiedglyph(target,characters,chars,unicode,index)
done[unic] = true
end
end
local step = offset - start
for unicode = start, stop do
remap(unicode + step,unicode,false)
end
if gaps then
for unic, unicode in next, gaps do
remap(unic,unicode,true)
remap(unicode,unicode,true)
end
end
end
end
elseif trace_collecting then
report_math("no fallback characters added to font %a",specification.hash)
end
end
end
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