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if not modules then modules = { } end modules ['font-chk'] = {
version = 1.001,
comment = "companion to font-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- possible optimization: delayed initialization of vectors
-- move to the nodes namespace
local format = string.format
local bpfactor = number.dimenfactors.bp
local report_fonts = logs.reporter("fonts","checking")
local fonts = fonts
fonts.checkers = fonts.checkers or { }
local checkers = fonts.checkers
local fonthashes = fonts.hashes
local fontdata = fonthashes.identifiers
local fontcharacters = fonthashes.characters
local addprivate = fonts.helpers.addprivate
local hasprivate = fonts.helpers.hasprivate
local getprivatenode = fonts.helpers.getprivatenode
local otffeatures = fonts.constructors.newfeatures("otf")
local registerotffeature = otffeatures.register
local is_character = characters.is_character
local chardata = characters.data
local tasks = nodes.tasks
local enableaction = tasks.enableaction
local disableaction = tasks.disableaction
local glyph_code = nodes.nodecodes.glyph
local traverse_id = node.traverse_id
local remove_node = nodes.remove
local insert_node_after = node.insert_after
-- maybe in fonts namespace
-- deletion can be option
local action = false
-- to tfmdata.properties ?
local function onetimemessage(font,char,message)
local tfmdata = fontdata[font]
local shared = tfmdata.shared
local messages = shared.messages
if not messages then
messages = { }
shared.messages = messages
end
local category = messages[message]
if not category then
category = { }
messages[message] = category
end
if not category[char] then
report_fonts("char U+%05X in font '%s' with id %s: %s",char,tfmdata.properties.fullname,font,message)
category[char] = true
end
end
fonts.loggers.onetimemessage = onetimemessage
local mapping = { -- this is just an experiment to illustrate some principles elsewhere
lu = "placeholder uppercase red",
ll = "placeholder lowercase red",
lt = "placeholder uppercase red",
lm = "placeholder lowercase red",
lo = "placeholder lowercase red",
mn = "placeholder mark green",
mc = "placeholder mark green",
me = "placeholder mark green",
nd = "placeholder lowercase blue",
nl = "placeholder lowercase blue",
no = "placeholder lowercase blue",
pc = "placeholder punctuation cyan",
pd = "placeholder punctuation cyan",
ps = "placeholder punctuation cyan",
pe = "placeholder punctuation cyan",
pi = "placeholder punctuation cyan",
pf = "placeholder punctuation cyan",
po = "placeholder punctuation cyan",
sm = "placeholder lowercase magenta",
sc = "placeholder lowercase yellow",
sk = "placeholder lowercase yellow",
so = "placeholder lowercase yellow",
}
table.setmetatableindex(mapping,function(t,k) v = "placeholder unknown gray" t[k] = v return v end)
local fakes = {
{
name = "lowercase",
code = ".025 -.175 m .425 -.175 l .425 .525 l .025 .525 l .025 -.175 l .025 0 l .425 0 l .025 -.175 m h S",
width = .45,
height = .55,
depth = .20,
},
{
name = "uppercase",
code = ".025 -.225 m .625 -.225 l .625 .675 l .025 .675 l .025 -.225 l .025 0 l .625 0 l .025 -.225 m h S",
width = .65,
height = .70,
depth = .25,
},
{
name = "mark",
code = ".025 .475 m .125 .475 l .125 .675 l .025 .675 l .025 .475 l h B",
width = .15,
height = .70,
depth = -.50,
},
{
name = "punctuation",
code = ".025 -.175 m .125 -.175 l .125 .525 l .025 .525 l .025 -.175 l h B",
width = .15,
height = .55,
depth = .20,
},
{
name = "unknown",
code = ".025 0 m .425 0 l .425 .175 l .025 .175 l .025 0 l h B",
width = .45,
height = .20,
depth = 0,
},
}
local variants = {
{ tag = "gray", r = .6, g = .6, b = .6 },
{ tag = "red", r = .6, g = 0, b = 0 },
{ tag = "green", r = 0, g = .6, b = 0 },
{ tag = "blue", r = 0, g = 0, b = .6 },
{ tag = "cyan", r = 0, g = .6, b = .6 },
{ tag = "magenta", r = .6, g = 0, b = .6 },
{ tag = "yellow", r = .6, g = .6, b = 0 },
}
local package = "q %0.6f 0 0 %0.6f 0 0 cm %s %s %s rg %s %s %s RG 10 M 1 j 1 J 0.05 w %s Q"
local cache = { } -- saves some tables but not that impressive
local function addmissingsymbols(tfmdata)
local characters = tfmdata.characters
local size = tfmdata.parameters.size
local privates = tfmdata.properties.privates
local scale = size * bpfactor
for i=1,#variants do
local v = variants[i]
local tag, r, g, b = v.tag, v.r, v.g, v.b
for i =1, #fakes do
local fake = fakes[i]
local name = fake.name
local privatename = format("placeholder %s %s",name,tag)
if not hasprivate(tfmdata,privatename) then
local hash = format("%s_%s_%s_%s_%s_%s",name,tag,r,g,b,size)
local char = cache[hash]
if not char then
char = {
width = size*fake.width,
height = size*fake.height,
depth = size*fake.depth,
commands = { { "special", "pdf: " .. format(package,scale,scale,r,g,b,r,g,b,fake.code) } }
}
cache[hash] = char
end
addprivate(tfmdata, privatename, char)
end
end
end
end
registerotffeature {
name = "missing",
description = "missing symbols",
manipulators = {
base = addmissingsymbols,
node = addmissingsymbols,
}
}
fonts.loggers.category_to_placeholder = mapping
function checkers.missing(head)
local lastfont, characters, found = nil, nil, nil
for n in traverse_id(glyph_code,head) do -- faster than while loop so we delay removal
local font = n.font
local char = n.char
if font ~= lastfont then
characters = fontcharacters[font]
end
if not characters[char] and is_character[chardata[char].category] then
if action == "remove" then
onetimemessage(font,char,"missing (will be deleted)")
elseif action == "replace" then
onetimemessage(font,char,"missing (will be flagged)")
else
onetimemessage(font,char,"missing")
end
if not found then
found = { n }
else
found[#found+1] = n
end
end
end
if not found then
-- all well
elseif action == "remove" then
for i=1,#found do
head = remove_node(head,found[i],true)
end
elseif action == "replace" then
for i=1,#found do
local n = found[i]
local font = n.font
local char = n.char
local tfmdata = fontdata[font]
local properties = tfmdata.properties
local privates = properties.privates
local category = chardata[char].category
local fakechar = mapping[category]
local p = privates and privates[fakechar]
if not p then
addmissingsymbols(tfmdata)
p = properties.privates[fakechar]
end
if properties.lateprivates then -- .frozen
-- bad, we don't have them at the tex end
local fake = getprivatenode(tfmdata,fakechar)
insert_node_after(head,n,fake)
head = remove_node(head,n,true)
else
-- good, we have \definefontfeature[default][default][missing=yes]
n.char = p
end
end
else
-- maye write a report to the log
end
return head, false
end
trackers.register("fonts.missing", function(v)
if v then
enableaction("processors","fonts.checkers.missing")
else
disableaction("processors","fonts.checkers.missing")
end
if v == "replace" then
otffeatures.defaults.missing = true
end
action = v
end)
function commands.checkcharactersinfont()
enableaction("processors","fonts.checkers.missing")
end
function commands.removemissingcharacters()
enableaction("processors","fonts.checkers.missing")
action = "remove"
end
function commands.replacemissingcharacters()
enableaction("processors","fonts.checkers.missing")
action = "replace"
otffeatures.defaults.missing = true
end
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