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phi-gamma/luaotfload-database.lua

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luaotfload-database.lua
if not modules then modules = { } end modules ['luaotfload-database'] = {
version = "2.3b",
comment = "companion to luaotfload.lua",
author = "Khaled Hosny, Elie Roux, Philipp Gesang",
copyright = "Luaotfload Development Team",
license = "GNU GPL v2"
}
--- TODO: if the specification is an absolute filename with a font not in the
--- database, add the font to the database and load it. There is a small
--- difficulty with the filenames of the TEXMF tree that are referenced as
--- relative paths...
local lpeg = require "lpeg"
local P, R, S, lpegmatch
= lpeg.P, lpeg.R, lpeg.S, lpeg.match
local C, Cc, Cf, Cg, Cs, Ct
= lpeg.C, lpeg.Cc, lpeg.Cf, lpeg.Cg, lpeg.Cs, lpeg.Ct
--- Luatex builtins
local load = load
local next = next
local pcall = pcall
local require = require
local tonumber = tonumber
local unpack = table.unpack
local fontloaderinfo = fontloader.info
local fontloaderopen = fontloader.open
local iolines = io.lines
local ioopen = io.open
local kpseexpand_path = kpse.expand_path
local kpseexpand_var = kpse.expand_var
local kpsefind_file = kpse.find_file
local kpselookup = kpse.lookup
local kpsereadable_file = kpse.readable_file
local lfsattributes = lfs.attributes
local lfschdir = lfs.chdir
local lfscurrentdir = lfs.currentdir
local lfsdir = lfs.dir
local mathabs = math.abs
local mathmin = math.min
local osremove = os.remove
local stringfind = string.find
local stringformat = string.format
local stringgmatch = string.gmatch
local stringgsub = string.gsub
local stringlower = string.lower
local stringsub = string.sub
local stringupper = string.upper
local tableconcat = table.concat
local tablesort = table.sort
local texiowrite_nl = texio.write_nl
local utf8gsub = unicode.utf8.gsub
local utf8lower = unicode.utf8.lower
--- these come from Lualibs/Context
local getwritablepath = caches.getwritablepath
local filebasename = file.basename
local filecollapsepath = file.collapsepath or file.collapse_path
local filedirname = file.dirname
local fileextname = file.extname
local fileiswritable = file.iswritable
local filejoin = file.join
local filenameonly = file.nameonly
local filereplacesuffix = file.replacesuffix
local filesplitpath = file.splitpath or file.split_path
local lfsisdir = lfs.isdir
local lfsisfile = lfs.isfile
local lfsmkdirs = lfs.mkdirs
local stringis_empty = string.is_empty
local stringsplit = string.split
local stringstrip = string.strip
local tableappend = table.append
local tablecopy = table.copy
local tabletofile = table.tofile
local tabletohash = table.tohash
--- the font loader namespace is “fonts”, same as in Context
--- we need to put some fallbacks into place for when running
--- as a script
fonts = fonts or { }
fonts.names = fonts.names or { }
fonts.definers = fonts.definers or { }
local names = fonts.names
config = config or { }
config.luaotfload = config.luaotfload or { }
config.luaotfload.resolver = config.luaotfload.resolver or "normal"
if config.luaotfload.update_live ~= false then
--- this option allows for disabling updates
--- during a TeX run
config.luaotfload.update_live = true
end
names.version = 2.207
names.data = nil --- contains the loaded database
names.lookups = nil --- contains the lookup cache
names.path = { index = { }, lookups = { } }
names.path.globals = {
prefix = "", --- writable_path/names_dir
names_dir = config.luaotfload.names_dir or "names",
index_file = config.luaotfload.index_file
or "luaotfload-names.lua",
lookups_file = "luaotfload-lookup-cache.lua",
}
--- string -> (string * string)
local make_luanames = function (path)
return filereplacesuffix(path, "lua"),
filereplacesuffix(path, "luc")
end
local report = logs.names_report
--[[doc--
We use the functions in the cache.* namespace that come with the
fontloader (see luat-basics-gen). it’s safe to use for the most part
since most checks and directory creations are already done. It
uses TEXMFCACHE or TEXMFVAR as starting points.
There is one quirk, though: ``getwritablepath()`` will always
assume that files in subdirectories of the cache tree are writable.
It gives no feedback at all if it fails to open a file in write
mode. This may cause trouble when the index or lookup cache were
created by different user.
--doc]]--
if caches then
local globals = names.path.globals
local names_dir = globals.names_dir
prefix = getwritablepath (names_dir, "")
if not prefix then
luaotfload.error
("Impossible to find a suitable writeable cache...")
else
report ("log", 0, "db",
"root cache directory is " .. prefix)
end
globals.prefix = prefix
local lookups = names.path.lookups
local index = names.path.index
local lookups_file = filejoin (prefix, globals.lookups_file)
local index_file = filejoin (prefix, globals.index_file)
lookups.lua, lookups.luc = make_luanames (lookups_file)
index.lua, index.luc = make_luanames (index_file)
else --- running as script, inject some dummies
caches = { }
logs = { report = function () end }
end
--[[doc--
Auxiliary functions
--doc]]--
--- string -> string
local sanitize_string = function (str)
if str ~= nil then
return utf8gsub(utf8lower(str), "[^%a%d]", "")
end
return nil
end
local find_files_indeed
find_files_indeed = function (acc, dirs, filter)
if not next (dirs) then --- done
return acc
end
local pwd = lfscurrentdir ()
local dir = dirs[#dirs]
dirs[#dirs] = nil
if lfschdir (dir) then
lfschdir (pwd)
local newfiles = { }
for ent in lfsdir (dir) do
if ent ~= "." and ent ~= ".." then
local fullpath = dir .. "/" .. ent
if filter (fullpath) == true then
if lfsisdir (fullpath) then
dirs[#dirs+1] = fullpath
elseif lfsisfile (fullpath) then
newfiles[#newfiles+1] = fullpath
end
end
end
end
return find_files_indeed (tableappend (acc, newfiles),
dirs, filter)
end
--- could not cd into, so we skip it
return find_files_indeed (acc, dirs, filter)
end
local dummyfilter = function () return true end
--- the optional filter function receives the full path of a file
--- system entity. a filter applies if the first argument it returns is
--- true.
--- string -> function? -> string list
local find_files = function (root, filter)
if lfsisdir (root) then
return find_files_indeed ({}, { root }, filter or dummyfilter)
end
end
--[[doc--
This is a sketch of the luaotfload db:
type dbobj = {
mappings : fontentry list;
status : filestatus;
version : float;
// new in v2.3; these supersede the basenames / barenames
// hashes from v2.2
filenames : filemap;
}
and filemap = {
base : (string, int) hash; // basename -> idx
bare : (string, int) hash; // barename -> idx
full : (int, string) hash; // idx -> full path
}
and fontentry = {
barename : string;
familyname : string;
filename : string;
fontname : string; // <- metadata
fullname : string; // <- metadata
sanitized : {
family : string;
fontname : string; // <- metadata
fullname : string; // <- namedata.names
metafamily : string;
pfullname : string;
prefmodifiers : string;
psname : string;
subfamily : string;
};
size : int list;
slant : int;
subfont : int;
texmf : bool;
weight : int;
width : int;
units_per_em : int; // mainly 1000, but also 2048 or 256
}
and filestatus = (fullname,
{ index : int list; timestamp : int }) dict
beware that this is a reconstruction and may be incomplete.
mtx-fonts has in names.tma:
type names = {
cache_uuid : uuid;
cache_version : float;
datastate : uuid list;
fallbacks : (filetype, (basename, int) hash) hash;
families : (basename, int list) hash;
files : (filename, fullname) hash;
indices : (fullname, int) hash;
mappings : (filetype, (basename, int) hash) hash;
names : ? (empty hash) ?;
rejected : (basename, int) hash;
specifications: fontentry list;
}
and fontentry = {
designsize : int;
familyname : string;
filename : string;
fontname : string;
format : string;
fullname : string;
maxsize : int;
minsize : int;
modification : int;
rawname : string;
style : string;
subfamily : string;
variant : string;
weight : string;
width : string;
}
--doc]]--
local fontnames_init = function (keep_cache) --- returns dbobj
return {
mappings = { },
status = { },
-- filenames = { }, -- created later
version = names.version,
}
end
--- When loading a lua file we try its binary complement first, which
--- is assumed to be located at an identical path, carrying the suffix
--- .luc.
--- string -> (string * table)
local load_lua_file = function (path)
local foundname = filereplacesuffix(path, "luc")
local fh = ioopen(foundname, "rb") -- try bin first
if fh then
local chunk = fh:read"*all"
fh:close()
code = load(chunk, "b")
end
if not code then --- fall back to text file
foundname = filereplacesuffix(path, "lua")
fh = ioopen(foundname, "rb")
if fh then
local chunk = fh:read"*all"
fh:close()
code = load(chunk, "t")
end
end
if not code then return nil, nil end
return foundname, code()
end
--- define locals in scope
local crude_file_lookup
local crude_file_lookup_verbose
local find_closest
local flush_lookup_cache
local font_fullinfo
local load_names
local load_lookups
local read_blacklist
local read_fonts_conf
local reload_db
local resolve
local resolve_cached
local resolve_fullpath
local save_names
local save_lookups
local update_names
--- state of the database
local fonts_loaded = false
local fonts_reloaded = false
--- limit output when approximate font matching (luaotfload-tool -F)
local fuzzy_limit = 1 --- display closest only
--- bool? -> dbobj
load_names = function (dry_run)
local starttime = os.gettimeofday()
local foundname, data = load_lua_file(names.path.index.lua)
if data then
report("both", 2, "db",
"Font names database loaded", "%s", foundname)
report("info", 3, "db", "Loading took %0.f ms",
1000*(os.gettimeofday()-starttime))
local db_version, nms_version = data.version, names.version
if db_version ~= nms_version then
report("both", 0, "db",
[[Version mismatch; expected %4.3f, got %4.3f]],
nms_version, db_version)
if not fonts_reloaded then
report("both", 0, "db", [[Force rebuild]])
return update_names({ }, true, false)
end
end
else
report("both", 0, "db",
[[Font names database not found, generating new one.]])
report("both", 0, "db",
[[This can take several minutes; please be patient.]])
data = update_names(fontnames_init(false), nil, dry_run)
local success = save_names(data)
if not success then
report("both", 0, "db", "Database creation unsuccessful.")
end
end
fonts_loaded = true
return data
end
--- unit -> dbobj
load_lookups = function ( )
local foundname, data = load_lua_file(names.path.lookups.lua)
if data then
report("both", 3, "cache",
"Lookup cache loaded (%s)", foundname)
else
report("both", 1, "cache",
"No lookup cache, creating empty.")
data = { }
end
return data
end
local style_synonyms = { set = { } }
do
local combine = function (ta, tb)
local result = { }
for i=1, #ta do
for j=1, #tb do
result[#result+1] = ta[i] .. tb[j]
end
end
return result
end
--- read this: http://blogs.adobe.com/typblography/2008/05/indesign_font_conflicts.html
--- tl;dr: font style synonyms are unreliable.
---
--- Context matches font names against lists of known identifiers
--- for weight, style, width, and variant, so that including
--- the family name there are five dimensions for choosing a
--- match. The sad thing is, while this is a decent heuristic it
--- makes no sense to imitate it in luaotfload because the user
--- interface must fit into the much more limited Xetex scheme that
--- distinguishes between merely four style categories (variants):
--- “regular”, “italic”, “bold”, and “bolditalic”. As a result,
--- some of the styles are lumped together although they can differ
--- significantly (like “medium” and “bold”).
--- Xetex (XeTeXFontMgr.cpp) appears to recognize only “plain”,
--- “normal”, and “roman” as synonyms for “regular”.
local list = {
regular = { "normal", "roman",
"plain", "book",
"light", "extralight",
"ultralight", },
bold = { "demi", "demibold",
"semibold", "boldregular",
"medium", "mediumbold",
"ultrabold", "extrabold",
"heavy", "black",
"bold", },
italic = { "regularitalic", "normalitalic",
"oblique", "slanted",
"italic", },
}
list.bolditalic = combine(list.bold, list.italic)
style_synonyms.list = list
for category, synonyms in next, style_synonyms.list do
style_synonyms.set[category] = tabletohash(synonyms, true)
end
end
local type1_formats = { "tfm", "ofm", }
local dummy_findfile = resolvers.findfile -- from basics-gen
--- filemap -> string -> string -> (string | bool)
local verbose_lookup = function (data, kind, filename)
local found = data[kind][filename]
if found ~= nil then
found = data.full[found]
if found == nil then --> texmf
report("info", 0, "db",
"Crude file lookup: req=%s; hit=%s => kpse",
filename, kind)
found = dummy_findfile(filename)
else
report("info", 0, "db",
"Crude file lookup: req=%s; hit=%s; ret=%s",
filename, kind, found)
end
return found
end
return false
end
--- string -> (string | string * string)
crude_file_lookup_verbose = function (filename)
if not names.data then names.data = load_names() end
local data = names.data
local mappings = data.mappings
local filenames = data.filenames
local found
--- look up in db first ...
found = verbose_lookup(filenames, "bare", filename)
if found then
return found
end
found = verbose_lookup(filenames, "base", filename)
if found then
return found
end
--- ofm and tfm, returns pair
for i=1, #type1_formats do
local format = type1_formats[i]
if resolvers.findfile(filename, format) then
return file.addsuffix(filename, format), format
end
end
return filename, nil
end
--- string -> (string | string * string)
crude_file_lookup = function (filename)
if not names.data then names.data = load_names() end
local data = names.data
local mappings = data.mappings
local filenames = data.filenames
local found
found = filenames.base[filename]
or filenames.bare[filename]
if found then
found = filenames.full[found]
if found == nil then
found = dummy_findfile(filename)
end
return found or filename
end
for i=1, #type1_formats do
local format = type1_formats[i]
if resolvers.findfile(filename, format) then
return file.addsuffix(filename, format), format
end
end
return filename, nil
end
--[[doc--
Existence of the resolved file name is verified differently depending
on whether the index entry has a texmf flag set.
--doc]]--
local get_font_file = function (fullnames, entry)
local basename = entry.basename
if entry.texmf == true then
if kpselookup(basename) then
return true, basename, entry.subfont
end
else
local fullname = fullnames[entry.index]
if lfsisfile(fullname) then
return true, basename, entry.subfont
end
end
return false
end
--[[doc--
We need to verify if the result of a cached lookup actually exists in
the texmf or filesystem.
--doc]]--
local verify_font_file = function (basename)
if not names.data then names.data = load_names() end
local filenames = names.data.filenames
local idx = filenames.base[basename]
if not idx then
return false
end
--- firstly, check filesystem
local fullname = filenames.full[idx]
if fullname and lfsisfile(fullname) then
return true
end
--- secondly, locate via kpathsea
if kpsefind_file(basename) then
return true
end
return false
end
--[[doc--
Lookups can be quite costly, more so the less specific they are.
Even if we find a matching font eventually, the next time the
user compiles Eir document E will have to stand through the delay
again.
Thus, some caching of results -- even between runs -- is in order.
We’ll just store successful name: lookups in a separate cache file.
type lookup_cache = (string, (string * num)) dict
Complete, needs testing:
× 1) add cache to dbobj
× 2) wrap lookups in cached versions
× 3) make caching optional (via the config table) for debugging
× 4) make names_update() cache aware (nil if “force”)
× 5) add logging
× 6) add cache control to luaotfload-tool
× 7) incr db version (now 2.203)
× 8) save cache only at the end of a run
The spec is modified in place (ugh), so we’ll have to catalogue what
fields actually influence its behavior.
Idk what the “spec” resolver is for.
lookup inspects modifies
file: name forced, name
name:* name, style, sub, resolved, sub, name, forced
optsize, size
spec: name, sub resolved, sub, name, forced
* name: contains both the name resolver from luatex-fonts and resolve()
below
From my reading of font-def.lua, what a resolver does is
basically rewrite the “name” field of the specification record
with the resolution.
Also, the fields “resolved”, “sub”, “force” etc. influence the outcome.
--doc]]--
local concat_char = "#"
local hash_fields = {
--- order is important
"specification", "style", "sub", "optsize", "size",
}
local n_hash_fields = #hash_fields
--- spec -> string
local hash_request = function (specification)
local key = { } --- segments of the hash
for i=1, n_hash_fields do
local field = specification[hash_fields[i]]
if field then
key[#key+1] = field
end
end
return tableconcat(key, concat_char)
end
--- 'a -> 'a -> table -> (string * int|boolean * boolean)
resolve_cached = function (_, _, specification)
if not names.lookups then names.lookups = load_lookups() end
local request = hash_request(specification)
report("both", 4, "cache", "Looking for %q in cache ...",
request)
local found = names.lookups[request]
--- case 1) cache positive ----------------------------------------
if found then --- replay fields from cache hit
report("info", 4, "cache", "Found!")
local basename = found[1]
--- check the presence of the file in case it’s been removed
local success = verify_font_file(basename)
if success == true then
return basename, found[2], true
end
report("both", 4, "cache", "Cached file not found; resolving again")
else
report("both", 4, "cache", "Not cached; resolving")
end
--- case 2) cache negative ----------------------------------------
--- first we resolve normally ...
local filename, subfont, success = resolve(nil, nil, specification)
if not success then return filename, subfont, false end
--- ... then we add the fields to the cache ... ...
local entry = { filename, subfont }
report("both", 4, "cache", "New entry: %s", request)
names.lookups[request] = entry
--- obviously, the updated cache needs to be stored.
--- TODO this should trigger a save only once the
--- document is compiled (finish_pdffile callback?)
report("both", 5, "cache", "Saving updated cache")
local success = save_lookups()
if not success then --- sad, but not critical
report("both", 0, "cache", "Could not write to cache")
end
return filename, subfont, true
end
--- this used to be inlined; with the lookup cache we don’t
--- have to be parsimonious wrt function calls anymore
--- “found” is the match accumulator
local add_to_match = function (found, size, face)
local optsize, dsnsize, maxsize, minsize
if #face.size > 0 then
optsize = face.size
dsnsize = optsize[1] and optsize[1] / 10
-- can be nil
maxsize = optsize[2] and optsize[2] / 10 or dsnsize
minsize = optsize[3] and optsize[3] / 10 or dsnsize
end
local continue = true
if optsize then
if dsnsize == size or (size > minsize and size <= maxsize) then
found[1] = face
continue = false ---> break
else
found[#found+1] = face
end
else
found[1] = face
continue = false ---> break
end
return found, continue
end
--[[doc--
Luatex-fonts, the font-loader package luaotfload imports, comes with
basic file location facilities (see luatex-fonts-syn.lua).
However, not only does the builtin functionality rely on Context’s font
name database, it is also too limited to be of more than basic use.
For this reason, luaotfload supplies its own resolvers that accesses
the font database created by the luaotfload-tool script.
--doc]]--
---
--- the request specification has the fields:
---
--- · features: table
--- · normal: set of { ccmp clig itlc kern liga locl mark mkmk rlig }
--- · ???
--- · forced: string
--- · lookup: "name"
--- · method: string
--- · name: string
--- · resolved: string
--- · size: int
--- · specification: string (== <lookup> ":" <name>)
--- · sub: string
---
--- the first return value of “resolve” is the file name of the
--- requested font (string)
--- the second is of type bool or string and indicates the subfont of a
--- ttc
---
--- 'a -> 'a -> table -> (string * string | bool * bool)
---
--- note by phg: I added a third return value that indicates a
--- successful lookup as this cannot be inferred from the other
--- values.
---
resolve = function (_, _, specification) -- the 1st two parameters are used by ConTeXt
if not fonts_loaded then names.data = load_names() end
local data = names.data
local name = sanitize_string(specification.name)
local style = sanitize_string(specification.style) or "regular"
local askedsize
if specification.optsize then
askedsize = tonumber(specification.optsize)
elseif specification.size then
askedsize = specification.size / 65536
end
if type(data) ~= "table" then
--- this catches a case where load_names() doesn’t
--- return a database object, which can happen only
--- in case there is valid Lua code in the database,
--- but it’s not a table, e.g. it contains an integer.
if not fonts_reloaded then
return reload_db("invalid database; not a table",
resolve, nil, nil, specification
)
end
--- unsucessfully reloaded; bail
return specification.name, false, false
end
if not data.mappings then
if not fonts_reloaded then
return reload_db("invalid database; missing font mapping",
resolve, nil, nil, specification)
end
return specification.name, false, false
end
local exact = { } --> collect exact style matches
local synonymous = { } --> collect matching style synonyms
local fallback --> e.g. non-matching style (fontspec is anal about this)
local candidates = { } --> secondary results, incomplete matches
local synonym_set = style_synonyms.set
for n, face in next, data.mappings do
local family, subfamily, fullname, prefmodifiers
local psname, fontname, pfullname, metafamily
local facenames = face.sanitized
if facenames then
family = facenames.family
subfamily = facenames.subfamily
prefmodifiers = facenames.prefmodifiers or facenames.subfamily
fullname = facenames.fullname
psname = facenames.psname
fontname = facenames.fontname
pfullname = facenames.pfullname
metafamily = facenames.metafamily
end
fontname = fontname or sanitize_string(face.fontname)
pfullname = pfullname or sanitize_string(face.fullname)
if name == family
or name == metafamily
then
if style == prefmodifiers then
local continue
exact, continue = add_to_match(exact, askedsize, face)
if continue == false then break end
elseif style == subfamily then
exact = add_to_match(exact, askedsize, face)
elseif synonym_set[style] and synonym_set[style][prefmodifiers]
or synonym_set.regular[prefmodifiers]
then
--- treat synonyms for prefmodifiers as first-class
--- (needed to prioritize DejaVu Book over Condensed)
exact = add_to_match(exact, askedsize, face)
elseif name == fullname
or name == pfullname
or name == fontname
or name == psname
then
synonymous = add_to_match(synonymous, askedsize, face)
elseif synonym_set[style] and synonym_set[style][subfamily]
or synonym_set.regular[subfamily]
then
synonymous = add_to_match(synonymous, askedsize, face)
elseif prefmodifiers == "regular"
or subfamily == "regular" then
fallback = face
else --- mark as last straw but continue
candidates[#candidates+1] = face
end
else
if name == fullname
or name == pfullname
or name == fontname
or name == psname then
local continue
exact, continue = add_to_match(exact, askedsize, face)
if continue == false then break end
end
end
end
local found
if next(exact) then
found = exact
else
found = synonymous
end
--- this is a monster
if #found == 1 then
--- “found” is really synonymous with “registered in the db”.
local entry = found[1]
local success, filename, subfont
= get_font_file(data.filenames.full, entry)
if success == true then
report("log", 0, "resolve",
"Font family='%s', subfamily='%s' found: %s",
name, style, filename
)
return filename, subfont, true
end
elseif #found > 1 then
-- we found matching font(s) but not in the requested optical
-- sizes, so we loop through the matches to find the one with
-- least difference from the requested size.
local closest
local least = math.huge -- initial value is infinity
for i,face in next, found do
local dsnsize = (face.size[1] or 0) / 10
local difference = mathabs(dsnsize - askedsize)
if difference < least then
closest = face
least = difference
end
end
local success, filename, subfont
= get_font_file(data.filenames.full, closest)
if success == true then
report("log", 0, "resolve",
"Font family='%s', subfamily='%s' found: %s",
name, style, filename
)
return filename, subfont, true
end
elseif fallback then
local success, filename, subfont
= get_font_file(data.filenames.full, fallback)
if success == true then
report("log", 0, "resolve",
"No exact match for request %s; using fallback",
specification.specification
)
report("log", 0, "resolve",
"Font family='%s', subfamily='%s' found: %s",
name, style, filename
)
return filename, subfont, true
end
elseif next(candidates) then
--- pick the first candidate encountered
local entry = candidates[1]
local success, filename, subfont
= get_font_file(data.filenames.full, entry)
if success == true then
report("log", 0, "resolve",
"Font family='%s', subfamily='%s' found: %s",
name, style, filename
)
return filename, subfont, true
end
end
--- no font found so far
if not fonts_reloaded then
--- last straw: try reloading the database
return reload_db(
"unresolved font name: '" .. name .. "'",
resolve, nil, nil, specification
)
end
--- else, default to requested name
return specification.name, false, false
end --- resolve()
resolve_fullpath = function (fontname, ext) --- getfilename()
if not fonts_loaded then
names.data = load_names()
end
local filenames = names.data.filenames
local idx = filenames.base[fontname]
or filenames.bare[fontname]
if idx then
return filenames.full[idx]
end
return ""
end
--- when reload is triggered we update the database
--- and then re-run the caller with the arg list
--- string -> ('a -> 'a) -> 'a list -> 'a
reload_db = function (why, caller, ...)
report("both", 1, "db", "Reload initiated; reason: %q", why)
names.data = update_names(names.data, false, false)
local success = save_names()
if success then
fonts_reloaded = true
return caller(...)
end
report("both", 0, "db", "Database update unsuccessful.")
end
--- string -> string -> int
local iterative_levenshtein = function (s1, s2)
local costs = { }
local len1, len2 = #s1, #s2
for i = 0, len1 do
local last = i
for j = 0, len2 do
if i == 0 then
costs[j] = j
else
if j > 0 then
local current = costs[j-1]
if stringsub(s1, i, i) ~= stringsub(s2, j, j) then
current = mathmin(current, last, costs[j]) + 1
end
costs[j-1] = last
last = current
end
end
end
if i > 0 then costs[len2] = last end
end
return costs[len2]--- lower right has the distance
end
--- string -> int -> bool
find_closest = function (name, limit)
local name = sanitize_string(name)
limit = limit or fuzzy_limit
if not fonts_loaded then names.data = load_names() end
local data = names.data
if type(data) ~= "table" then
if not fonts_reloaded then
return reload_db("no database", find_closest, name)
end
return false
end
local by_distance = { } --- (int, string list) dict
local distances = { } --- int list
local cached = { } --- (string, int) dict
local mappings = data.mappings
local n_fonts = #mappings
for n = 1, n_fonts do
local current = mappings[n]
local cnames = current.sanitized
--[[
This is simplistic but surpisingly fast.
Matching is performed against the “family” name
of a db record. We then store its “fullname” at
it edit distance.
We should probably do some weighting over all the
font name categories as well as whatever agrep
does.
--]]
if cnames then
local fullname, family = cnames.fullname, cnames.family
local dist = cached[family]--- maybe already calculated
if not dist then
dist = iterative_levenshtein(name, family)
cached[family] = dist
end
local namelst = by_distance[dist]
if not namelst then --- first entry
namelst = { fullname }
distances[#distances+1] = dist
else --- append
namelst[#namelst+1] = fullname
end
by_distance[dist] = namelst
end
end
--- print the matches according to their distance
local n_distances = #distances
if n_distances > 0 then --- got some data
tablesort(distances)
limit = mathmin(n_distances, limit)
report(false, 1, "query",
"Displaying %d distance levels", limit)
for i = 1, limit do
local dist = distances[i]
local namelst = by_distance[dist]
report(false, 0, "query",
"Distance from \"" .. name .. "\": " .. dist
.. "\n " .. tableconcat(namelst, "\n ")
)
end
return true
end
return false
end --- find_closest()
local sanitize_names = function (names)
local res = { }
for idx, name in next, names do
res[idx] = sanitize_string(name)
end
return res
end
--[[doc--
The data inside an Opentype font file can be quite heterogeneous.
Thus in order to get the relevant information, parts of the original
table as returned by the font file reader need to be relocated.
--doc]]--
--- string -> int -> bool -> string -> fontentry
font_fullinfo = function (filename, subfont, texmf, basename)
local tfmdata = { }
local rawfont = fontloaderopen(filename, subfont)
if not rawfont then
report("log", 1, "error", "Failed to open %s", filename)
return
end
local metadata = fontloader.to_table(rawfont)
fontloader.close(rawfont)
collectgarbage("collect")
-- see http://www.microsoft.com/typography/OTSPEC/features_pt.htm#size
if metadata.fontstyle_name then
for _, name in next, metadata.fontstyle_name do
if name.lang == 1033 then --- I hate magic numbers
tfmdata.fontstyle_name = name.name
end
end
end
if metadata.names then
for _, namedata in next, metadata.names do
if namedata.lang == "English (US)" then
local names = {
--- see
--- https://developer.apple.com/fonts/TTRefMan/RM06/Chap6name.html
fullname = namedata.names.compatfull
or namedata.names.fullname,
family = namedata.names.preffamilyname
or namedata.names.family,
prefmodifiers = namedata.names.prefmodifiers,
subfamily = tfmdata.fontstyle_name
or namedata.names.subfamily,
psname = namedata.names.postscriptname,
pfullname = metadata.fullname,
fontname = metadata.fontname,
metafamily = metadata.familyname,
}
-- tfmdata.names = names
tfmdata.sanitized = sanitize_names(names)
end
end
else
-- no names table, propably a broken font
report("log", 1, "db", "Broken font rejected", "%s", basefile)
return
end
tfmdata.fontname = metadata.fontname
tfmdata.fullname = metadata.fullname
tfmdata.familyname = metadata.familyname
tfmdata.weight = metadata.pfminfo.weight
tfmdata.width = metadata.pfminfo.width
tfmdata.slant = metadata.italicangle
--- this is for querying
tfmdata.units_per_em = metadata.units_per_em
tfmdata.version = metadata.version
-- don't waste the space with zero values
tfmdata.size = {
metadata.design_size ~= 0 and metadata.design_size or nil,
metadata.design_range_top ~= 0 and metadata.design_range_top or nil,
metadata.design_range_bottom ~= 0 and metadata.design_range_bottom or nil,
}
--- file location data (used to be filename field)
tfmdata.filename = filename --> sys
tfmdata.basename = basename --> texmf
tfmdata.texmf = texmf or false
tfmdata.subfont = subfont
return tfmdata
end
--- we return true if the fond is new or re-indexed
--- string -> dbobj -> dbobj -> bool
local load_font = function (fullname, fontnames, newfontnames, texmf)
if not fullname then
return false
end
local newmappings = newfontnames.mappings
local newstatus = newfontnames.status --- by full path
local mappings = fontnames.mappings
local status = fontnames.status
local basename = filebasename(fullname)
local barename = filenameonly(fullname)
local entryname = fullname
if texmf == true then
entryname = basename
end
if names.blacklist[fullname] or names.blacklist[basename]
then
report("log", 2, "db",
"Ignoring blacklisted font %q", fullname)
return false
end
local new_timestamp, current_timestamp
current_timestamp = status[fullname]
and status[fullname].timestamp
new_timestamp = lfsattributes(fullname, "modification")
local newentrystatus = newstatus[fullname]
--- newentrystatus: nil | false | table
if newentrystatus and newentrystatus.timestamp == new_timestamp then
-- already indexed this run
return false
end
newstatus[fullname] = newentrystatus or { }
local newentrystatus = newstatus[fullname]
newentrystatus.timestamp = new_timestamp
newentrystatus.index = newentrystatus.index or { }
if current_timestamp == new_timestamp
and not newentrystatus.index[1]
then
for _, v in next, status[fullname].index do
local index = #newentrystatus.index
local fullinfo = mappings[v]
local location = #newmappings + 1
newmappings[location] = fullinfo --- keep
newentrystatus.index[index+1] = location --- is this actually used anywhere?
end
report("log", 2, "db", "Font %q already indexed", basename)
return false
end
local info = fontloaderinfo(fullname)
if info then
if type(info) == "table" and #info > 1 then --- ttc
for n_font = 1, #info do
local fullinfo = font_fullinfo(fullname, n_font-1, texmf, basename)
if not fullinfo then
return false
end
local location = #newmappings+1
local index = newentrystatus.index[n_font]
if not index then index = location end
newmappings[index] = fullinfo
newentrystatus.index[n_font] = index
end
else
local fullinfo = font_fullinfo(fullname, false, texmf, basename)
if not fullinfo then
return false
end
local location = #newmappings+1
local index = newentrystatus.index[1]
if not index then index = location end
newmappings[index] = fullinfo
newentrystatus.index[1] = index
end
else --- missing info
report("log", 1, "db", "Failed to load %q", basename)
return false
end
return true
end
local path_normalize
do
--- os.type and os.name are constants so we
--- choose a normalization function in advance
--- instead of testing with every call
local os_type, os_name = os.type, os.name
local filecollapsepath = filecollapsepath
local lfsreadlink = lfs.readlink
--- windows and dos
if os_type == "windows" or os_type == "msdos" then
--- ms platfom specific stuff
path_normalize = function (path)
path = stringgsub(path, '\\', '/')
path = stringlower(path)
path = filecollapsepath(path)
return path
end
--[[doc--
The special treatment for cygwin was removed with a patch submitted
by Ken Brown.
Reference: http://cygwin.com/ml/cygwin/2013-05/msg00006.html
--doc]]--
else -- posix
path_normalize = function (path)
local dest = lfsreadlink(path)
if dest then
if kpsereadable_file(dest) then
path = dest
elseif kpsereadable_file(filejoin(filedirname(path), dest)) then
path = filejoin(file.dirname(path), dest)
else
-- broken symlink?
end
end
path = filecollapsepath(path)
return path
end
end
end
fonts.path_normalize = path_normalize
names.blacklist = { }
local blacklist = names.blacklist
local p_blacklist --- prefixes of dirs
--- string list -> string list
local collapse_prefixes = function (lst)
--- avoid redundancies in blacklist
if #lst < 2 then
return lst
end
tablesort(lst)
local cur = lst[1]
local result = { cur }
for i=2, #lst do
local elm = lst[i]
if stringsub(elm, 1, #cur) ~= cur then
--- different prefix
cur = elm
result[#result+1] = cur
end
end
return result
end
--- string list -> string list -> (string, bool) hash_t
local create_blacklist = function (blacklist, whitelist)
local result = { }
local dirs = { }
report("info", 2, "db", "Blacklisting %q files and directories",
#blacklist)
for i=1, #blacklist do
local entry = blacklist[i]
if lfsisdir(entry) then
dirs[#dirs+1] = entry
else
result[blacklist[i]] = true
end
end
report("info", 2, "db", "Whitelisting %q files", #whitelist)
for i=1, #whitelist do
result[whitelist[i]] = nil
end
dirs = collapse_prefixes(dirs)
--- build the disjunction of the blacklisted directories
for i=1, #dirs do
local p_dir = P(dirs[i])
if p_blacklist then
p_blacklist = p_blacklist + p_dir
else
p_blacklist = p_dir
end
end
if p_blacklist == nil then
--- always return false
p_blacklist = Cc(false)
end
return result
end
--- unit -> unit
read_blacklist = function ()
local files = {
kpselookup ("luaotfload-blacklist.cnf",
{all=true, format="tex"})
}
local blacklist = { }
local whitelist = { }
if files and type(files) == "table" then
for _,v in next, files do
for line in iolines(v) do
line = stringstrip(line) -- to get rid of lines like " % foo"
local first_chr = stringsub(line, 1, 1) --- faster than find
if first_chr == "%" or stringis_empty(line) then
-- comment or empty line
elseif first_chr == "-" then
whitelist[#whitelist+1] = stringsub(line, 2, -1)
else
local cmt = stringfind(line, "%%")
if cmt then
line = stringsub(line, 1, cmt - 1)
end
line = stringstrip(line)
report("log", 2, "db", "Blacklisted file %q", line)
blacklist[#blacklist+1] = line
end
end
end
end
names.blacklist = create_blacklist(blacklist, whitelist)
end
local font_extensions = { "otf", "ttf", "ttc", "dfont" }
local font_extensions_set = tabletohash (font_extensions)
local p_font_extensions
do
local extns
--tablesort (font_extensions) --- safeguard
for i=#font_extensions, 1, -1 do
local e = font_extensions[i]
if not extns then
extns = P(e)
else
extns = extns + P(e)
end
end
extns = extns * P(-1)
p_font_extensions = (1 - extns)^1 * extns
end
local process_dir_tree
process_dir_tree = function (acc, dirs)
if not next (dirs) then --- done
return acc
end
local pwd = lfscurrentdir ()
local dir = dirs[#dirs]
dirs[#dirs] = nil
if lfschdir (dir) then
lfschdir (pwd)
local newfiles = { }
local blacklist = names.blacklist
for ent in lfsdir (dir) do
--- filter right away
if ent ~= "." and ent ~= ".." and not blacklist[ent] then
local fullpath = dir .. "/" .. ent
if lfsisdir (fullpath)
and not lpegmatch (p_blacklist, fullpath)
then
dirs[#dirs+1] = fullpath
elseif lfsisfile (fullpath) then
if lpegmatch (p_font_extensions, stringlower(ent)) then
newfiles[#newfiles+1] = fullpath
end
end
end
end
return process_dir_tree (tableappend (acc, newfiles), dirs)
end
--- cannot cd; skip
return process_dir_tree (acc, dirs)
end
--- string -> string list
local find_font_files = function (root)
if lfsisdir (root) then
return process_dir_tree ({}, { root })
end
end
--[[doc--
scan_dir() scans a directory and populates the list of fonts
with all the fonts it finds.
· dirname : name of the directory to scan
· fontnames : current font db object
· newnames : font db object to fill
· dry_run : don’t touch anything
--doc]]--
--- string -> dbobj -> dbobj -> bool -> bool -> (int * int)
local scan_dir = function (dirname, fontnames, newfontnames,
dry_run, texmf)
if lpegmatch (p_blacklist, dirname) then
report ("both", 3, "db",
"Skipping blacklisted directory %s", dirname)
--- ignore
return 0, 0
end
local found = find_font_files (dirname)
if not found then
report ("both", 3, "db",
"No such directory: %q; skipping.", dirname)
return 0, 0
end
report ("both", 3, "db", "Scanning directory %s", dirname)
local n_new = 0 --- total of fonts collected
local n_found = #found
report ("both", 4, "db", "%d font files detected", n_found)
for j=1, n_found do
local fullname = found[j]
fullname = path_normalize(fullname)
local new
if dry_run == true then
report ("both", 1, "db",
"Would have been loading %q", fullname)
else
report ("both", 4, "db",
"Loading font %q", fullname)
local new = load_font (fullname, fontnames,
newfontnames, texmf)
if new == true then
n_new = n_new + 1
end
end
end
report("both", 4, "db", "%d fonts found in '%s'", n_found, dirname)
return n_found, n_new
end
--- dbobj -> dbobj -> bool? -> (int * int)
local scan_texmf_fonts = function (fontnames, newfontnames, dry_run)
local n_scanned, n_new = 0, 0
--[[
This function scans all fonts in the texmf tree, through kpathsea
variables OPENTYPEFONTS and TTFONTS of texmf.cnf
]]
if stringis_empty(kpseexpand_path("$OSFONTDIR")) then
report("info", 2, "db", "Scanning TEXMF fonts...")
else
report("info", 2, "db", "Scanning TEXMF and OS fonts...")
end
local fontdirs = stringgsub(kpseexpand_path("$OPENTYPEFONTS"), "^%.", "")
fontdirs = fontdirs .. stringgsub(kpseexpand_path("$TTFONTS"), "^%.", "")
if not stringis_empty(fontdirs) then
for _,d in next, filesplitpath(fontdirs) do
local found, new = scan_dir(d, fontnames, newfontnames, dry_run, true)
n_scanned = n_scanned + found
n_new = n_new + new
end
end
return n_scanned, n_new
end
--[[
For the OS fonts, there are several options:
- if OSFONTDIR is set (which is the case under windows by default but
not on the other OSs), it scans it at the same time as the texmf tree,
in the scan_texmf_fonts.
- if not:
- under Windows and Mac OSX, we take a look at some hardcoded directories
- under Unix, we read /etc/fonts/fonts.conf and read the directories in it
This means that if you have fonts in fancy directories, you need to set them
in OSFONTDIR.
]]
local read_fonts_conf
do --- closure for read_fonts_conf()
local alpha = R("az", "AZ")
local digit = R"09"
local tag_name = C(alpha^1)
local whitespace = S" \n\r\t\v"
local ws = whitespace^1
local comment = P"<!--" * (1 - P"--")^0 * P"-->"
---> header specifica
local xml_declaration = P"<?xml" * (1 - P"?>")^0 * P"?>"
local xml_doctype = P"<!DOCTYPE" * ws
* "fontconfig" * (1 - P">")^0 * P">"
local header = xml_declaration^-1
* (xml_doctype + comment + ws)^0
---> enforce root node
local root_start = P"<" * ws^-1 * P"fontconfig" * ws^-1 * P">"
local root_stop = P"</" * ws^-1 * P"fontconfig" * ws^-1 * P">"
local dquote, squote = P[["]], P"'"
local xml_namestartchar = S":_" + alpha --- ascii only, funk the rest
local xml_namechar = S":._" + alpha + digit
local xml_name = ws^-1
* C(xml_namestartchar * xml_namechar^0)
local xml_attvalue = dquote * C((1 - S[[%&"]])^1) * dquote * ws^-1
+ squote * C((1 - S[[%&']])^1) * squote * ws^-1
local xml_attr = Cg(xml_name * P"=" * xml_attvalue)
local xml_attr_list = Cf(Ct"" * xml_attr^1, rawset)
--[[doc--
scan_node creates a parser for a given xml tag.
--doc]]--
--- string -> bool -> lpeg_t
local scan_node = function (tag)
--- Node attributes go into a table with the index “attributes”
--- (relevant for “prefix="xdg"” and the likes).
local p_tag = P(tag)
local with_attributes = P"<" * p_tag
* Cg(xml_attr_list, "attributes")^-1
* ws^-1
* P">"
local plain = P"<" * p_tag * ws^-1 * P">"
local node_start = plain + with_attributes
local node_stop = P"</" * p_tag * ws^-1 * P">"
--- there is no nesting, the earth is flat ...
local node = node_start
* Cc(tag) * C(comment + (1 - node_stop)^1)
* node_stop
return Ct(node) -- returns {string, string [, attributes = { key = val }] }
end
--[[doc--
At the moment, the interesting tags are “dir” for
directory declarations, and “include” for including
further configuration files.
spec: http://freedesktop.org/software/fontconfig/fontconfig-user.html
--doc]]--
local include_node = scan_node"include"
local dir_node = scan_node"dir"
local element = dir_node
+ include_node
+ comment --> ignore
+ P(1-root_stop) --> skip byte
local root = root_start * Ct(element^0) * root_stop
local p_cheapxml = header * root
--lpeg.print(p_cheapxml) ---> 757 rules with v0.10
--[[doc--
fonts_conf_scanner() handles configuration files.
It is called on an abolute path to a config file (e.g.
/home/luser/.config/fontconfig/fonts.conf) and returns a list
of the nodes it managed to extract from the file.
--doc]]--
--- string -> path list
local fonts_conf_scanner = function (path)
local fh = ioopen(path, "r")
if not fh then
report("both", 3, "db", "Cannot open fontconfig file %s", path)
return
end
local raw = fh:read"*all"
fh:close()
local confdata = lpegmatch(p_cheapxml, raw)
if not confdata then
report("both", 3, "db", "Cannot scan fontconfig file %s", path)
return
end
return confdata
end
local p_conf = P".conf" * P(-1)
local p_filter = (1 - p_conf)^1 * p_conf
local conf_filter = function (path)
if lpegmatch (p_filter, path) then
return true
end
return false
end
--[[doc--
read_fonts_conf_indeed() is called with six arguments; the
latter three are tables that represent the state and are
always returned.
The first three are
· the path to the file
· the expanded $HOME
· the expanded $XDG_CONFIG_DIR
--doc]]--
--- string -> string -> string -> tab -> tab -> (tab * tab * tab)
local read_fonts_conf_indeed
read_fonts_conf_indeed = function (start, home, xdg_home,
acc, done, dirs_done)
local paths = fonts_conf_scanner(start)
if not paths then --- nothing to do
return acc, done, dirs_done
end
for i=1, #paths do
local pathobj = paths[i]
local kind, path = pathobj[1], pathobj[2]
local attributes = pathobj.attributes
if attributes and attributes.prefix == "xdg" then
--- this prepends the xdg root (usually ~/.config)
path = filejoin(xdg_home, path)
end
if kind == "dir" then
if stringsub(path, 1, 1) == "~" then
path = filejoin(home, stringsub(path, 2))
end
--- We exclude paths with texmf in them, as they should be
--- found anyway; also duplicates are ignored by checking
--- if they are elements of dirs_done.
if not (stringfind(path, "texmf") or dirs_done[path]) then
acc[#acc+1] = path
dirs_done[path] = true
end
elseif kind == "include" then
--- here the path can be four things: a directory or a file,
--- in absolute or relative path.
if stringsub(path, 1, 1) == "~" then
path = filejoin(home, stringsub(path, 2))
elseif --- if the path is relative, we make it absolute
not ( lfsisfile(path) or lfsisdir(path) )
then
path = filejoin(filedirname(start), path)
end
if lfsisfile(path)
and kpsereadable_file(path)
and not done[path]
then
--- we exclude path with texmf in them, as they should
--- be found otherwise
acc = read_fonts_conf_indeed(
path, home, xdg_home,
acc, done, dirs_done)
elseif lfsisdir(path) then --- arrow code ahead
local config_files = find_files (path, conf_filter)
for _, filename in next, config_files do
if not done[filename] then
acc = read_fonts_conf_indeed(
filename, home, xdg_home,
acc, done, dirs_done)
end
end
end --- match “kind”
end --- iterate paths
end
--inspect(acc)
--inspect(done)
return acc, done, dirs_done
end --- read_fonts_conf_indeed()
--[[doc--
read_fonts_conf() sets up an accumulator and two sets
for tracking what’s been done.
Also, the environment variables HOME and XDG_CONFIG_HOME --
which are constants anyways -- are expanded so don’t have to
repeat that over and over again as with the old parser.
Now they’re just passed on to every call of
read_fonts_conf_indeed().
read_fonts_conf() is also the only reference visible outside
the closure.
--doc]]--
--- list -> list
read_fonts_conf = function (path_list)
local home = kpseexpand_path"~" --- could be os.getenv"HOME"
local xdg_home = kpseexpand_path"$XDG_CONFIG_HOME"
if xdg_home == "" then xdg_home = filejoin(home, ".config") end
local acc = { } ---> list: paths collected
local done = { } ---> set: files inspected
local dirs_done = { } ---> set: dirs in list
for i=1, #path_list do --- we keep the state between files
acc, done, dirs_done = read_fonts_conf_indeed(
path_list[i], home, xdg_home,
acc, done, dirs_done)
end
return acc
end
end --- read_fonts_conf closure
--- TODO stuff those paths into some writable table
--- unit -> string list
local function get_os_dirs ()
if os.name == 'macosx' then
return {
filejoin(kpseexpand_path('~'), "Library/Fonts"),
"/Library/Fonts",
"/System/Library/Fonts",
"/Network/Library/Fonts",
}
elseif os.type == "windows" or os.type == "msdos" then
local windir = os.getenv("WINDIR")
return { filejoin(windir, 'Fonts') }
else
local fonts_conves = { --- plural, much?
"/usr/local/etc/fonts/fonts.conf",
"/etc/fonts/fonts.conf",
}
local os_dirs = read_fonts_conf(fonts_conves)
return os_dirs
end
return {}
end
--- dbobj -> dbobj -> bool? -> (int * int)
local scan_os_fonts = function (fontnames, newfontnames, dry_run)
local n_scanned, n_new = 0, 0
--[[
This function scans the OS fonts through
- fontcache for Unix (reads the fonts.conf file and scans the
directories)
- a static set of directories for Windows and MacOSX
]]
report("info", 2, "db", "Scanning OS fonts...")
report("info", 3, "db", "Searching in static system directories...")
for _, d in next, get_os_dirs() do
local found, new = scan_dir(d, fontnames, newfontnames, dry_run)
n_scanned = n_scanned + found
n_new = n_new + new
end
return n_scanned, n_new
end
--- unit -> (bool, lookup_cache)
flush_lookup_cache = function ()
if not names.lookups then names.lookups = load_lookups() end
names.lookups = { }
collectgarbage "collect"
return true, names.lookups
end
--- dbobj -> dbobj
local gen_fast_lookups = function (fontnames)
report("both", 2, "db", "Creating filename map")
local mappings = fontnames.mappings
local nmappings = #mappings
--- this is needlessly complicated due to texmf priorization
local filenames = {
bare = { },
base = { },
full = { }, --- non-texmf
}
local texmf, sys = { }, { } -- quintuple list
for idx = 1, nmappings do
local entry = mappings[idx]
local filename = entry.filename
local basename = entry.basename
local bare = filenameonly(filename)
local subfont = entry.subfont
entry.index = idx
--- unfortunately, the sys/texmf schism prevents us from
--- doing away the full name, so we cannot avoid the
--- substantial duplication
-- entry.filename = nil
if entry.texmf == true then
texmf[#texmf+1] = { idx, basename, bare, true, nil }
else
sys[#sys+1] = { idx, basename, bare, false, filename }
end
end
local addmap = function (lst)
--- this will overwrite existing entries
for i=1, #lst do
local idx, base, bare, intexmf, full = unpack(lst[i])
local known = filenames.base[base] or filenames.bare[bare]
if known then --- known
report("both", 3, "db",
"Font file %q already indexed (%d)",
base, idx)
report("both", 3, "db", "> old location: %s",
(filenames.full[known] or "texmf"))
report("both", 3, "db", "> new location: %s",
(intexmf and "texmf" or full))
end
filenames.bare[bare] = idx
filenames.base[base] = idx
if intexmf == true then
filenames.full[idx] = nil
else
filenames.full[idx] = full
end
end
end
if config.luaotfload.prioritize == "texmf" then
report("both", 2, "db", "Preferring texmf fonts")
addmap(sys)
addmap(texmf)
else --- sys
addmap(texmf)
addmap(sys)
end
fontnames.filenames = filenames
texmf, sys = nil, nil
collectgarbage "collect"
return fontnames
end
--- force: dictate rebuild from scratch
--- dry_dun: don’t write to the db, just scan dirs
--- dbobj? -> bool? -> bool? -> dbobj
update_names = function (fontnames, force, dry_run)
if config.luaotfload.update_live == false then
report("info", 2, "db",
"skipping database update")
--- skip all db updates
return fontnames or names.data
end
local starttime = os.gettimeofday()
local n_scanned, n_new = 0, 0
--[[
The main function, scans everything
- “newfontnames” is the final table to return
- force is whether we rebuild it from scratch or not
]]
report("both", 2, "db", "Updating the font names database"
.. (force and " forcefully" or ""))
if force then
fontnames = fontnames_init(false)
else
if not fontnames then
fontnames = load_names(dry_run)
end
if fontnames.version ~= names.version then
report("both", 1, "db", "No font names database or old "
.. "one found; generating new one")
fontnames = fontnames_init(true)
end
end
local newfontnames = fontnames_init(true)
read_blacklist()
local scanned, new
scanned, new = scan_texmf_fonts(fontnames, newfontnames, dry_run)
n_scanned = n_scanned + scanned
n_new = n_new + new
scanned, new = scan_os_fonts(fontnames, newfontnames, dry_run)
n_scanned = n_scanned + scanned
n_new = n_new + new
--- we always generate the file lookup tables because
--- non-texmf entries are redirected there and the mapping
--- needs to be 100% consistent
newfontnames = gen_fast_lookups(newfontnames)
--- stats:
--- before rewrite | after rewrite
--- partial: 804 ms | 701 ms
--- forced: 45384 ms | 44714 ms
report("info", 3, "db",
"Scanned %d font files; %d new entries.", n_scanned, n_new)
report("info", 3, "db",
"Rebuilt in %0.f ms", 1000*(os.gettimeofday()-starttime))
return newfontnames
end
--- The lookup cache is an experimental feature of version 2.2;
--- instead of incorporating it into the database it gets its own
--- file. As we update it after every single addition this saves us
--- quite some time.
--- unit -> bool
save_lookups = function ( )
local lookups = names.lookups
local path = names.path.lookups
local luaname, lucname = path.lua, path.luc
if fileiswritable (luaname) and fileiswritable (lucname) then
tabletofile (luaname, lookups, true)
osremove (lucname)
caches.compile (lookups, luaname, lucname)
--- double check ...
if lfsisfile (luaname) and lfsisfile (lucname) then
report ("both", 3, "cache", "Lookup cache saved")
return true
end
report ("info", 0, "cache", "Could not compile lookup cache")
return false
end
report ("info", 0, "cache", "Lookup cache file not writable")
if not fileiswritable (luaname) then
report ("info", 0, "cache", "Failed to write %s", luaname)
end
if not fileiswritable (lucname) then
report ("info", 0, "cache", "Failed to write %s", lucname)
end
return false
end
--- save_names() is usually called without the argument
--- dbobj? -> bool
save_names = function (fontnames)
if not fontnames then fontnames = names.data end
local path = names.path.index
local luaname, lucname = path.lua, path.luc
if fileiswritable (luaname) and fileiswritable (lucname) then
tabletofile (luaname, fontnames, true)
osremove (lucname)
caches.compile (fontnames, luaname, lucname)
if lfsisfile (luaname) and lfsisfile (lucname) then
report ("info", 1, "db", "Font index saved")
report ("info", 3, "db", "Text: " .. luaname)
report ("info", 3, "db", "Byte: " .. lucname)
return true
end
report ("info", 0, "db", "Could not compile font index")
return false
end
report ("info", 0, "db", "Index file not writable")
if not fileiswritable (luaname) then
report ("info", 0, "db", "Failed to write %s", luaname)
end
if not fileiswritable (lucname) then
report ("info", 0, "db", "Failed to write %s", lucname)
end
return false
end
--[[doc--
Below set of functions is modeled after mtx-cache.
--doc]]--
--- string -> string -> string list -> string list -> string list -> unit
local print_cache = function (category, path, luanames, lucnames, rest)
local report_indeed = function (...)
report("info", 0, "cache", ...)
end
report_indeed("Luaotfload cache: %s", category)
report_indeed("location: %s", path)
report_indeed("[raw] %4i", #luanames)
report_indeed("[compiled] %4i", #lucnames)
report_indeed("[other] %4i", #rest)
report_indeed("[total] %4i", #luanames + #lucnames + #rest)
end
--- string -> string -> string list -> bool -> bool
local purge_from_cache = function (category, path, list, all)
report("info", 2, "cache", "Luaotfload cache: %s %s",
(all and "erase" or "purge"), category)
report("info", 2, "cache", "location: %s",path)
local n = 0
for i=1,#list do
local filename = list[i]
if stringfind(filename,"luatex%-cache") then -- safeguard
if all then
report("info", 5, "cache", "removing %s", filename)
osremove(filename)
n = n + 1
else
local suffix = file.suffix(filename)
if suffix == "lua" then
local checkname = file.replacesuffix(
filename, "lua", "luc")
if lfs.isfile(checkname) then
report("info", 5, "cache", "Removing %s", filename)
osremove(filename)
n = n + 1
end
end
end
end
end
report("info", 2, "cache", "Removed lua files : %i", n)
return true
end
--- string -> string list -> int -> string list -> string list -> string list ->
--- (string list * string list * string list * string list)
local collect_cache collect_cache = function (path, all, n, luanames,
lucnames, rest)
if not all then
local all = find_files (path)
local luanames, lucnames, rest = { }, { }, { }
return collect_cache(nil, all, 1, luanames, lucnames, rest)
end
local filename = all[n]
if filename then
local suffix = file.suffix(filename)
if suffix == "lua" then
luanames[#luanames+1] = filename
elseif suffix == "luc" then
lucnames[#lucnames+1] = filename
else
rest[#rest+1] = filename
end
return collect_cache(nil, all, n+1, luanames, lucnames, rest)
end
return luanames, lucnames, rest, all
end
local getwritablecachepath = function ( )
--- fonts.handlers.otf doesn’t exist outside a Luatex run,
--- so we have to improvise
local writable = getwritablepath (config.luaotfload.cache_dir)
if writable then
return writable
end
end
local getreadablecachepaths = function ( )
local readables = caches.getreadablepaths
(config.luaotfload.cache_dir)
local result = { }
if readables then
for i=1, #readables do
local readable = readables[i]
if lfsisdir (readable) then
result[#result+1] = readable
end
end
end
return result
end
--- unit -> unit
local purge_cache = function ( )
local writable_path = getwritablecachepath ()
local luanames, lucnames, rest = collect_cache(writable_path)
if logs.get_loglevel() > 1 then
print_cache("writable path", writable_path, luanames, lucnames, rest)
end
local success = purge_from_cache("writable path", writable_path, luanames, false)
return success
end
--- unit -> unit
local erase_cache = function ( )
local writable_path = getwritablecachepath ()
local luanames, lucnames, rest, all = collect_cache(writable_path)
if logs.get_loglevel() > 1 then
print_cache("writable path", writable_path, luanames, lucnames, rest)
end
local success = purge_from_cache("writable path", writable_path, all, true)
return success
end
local separator = function ( )
report("info", 0, string.rep("-", 67))
end
--- unit -> unit
local show_cache = function ( )
local readable_paths = getreadablecachepaths ()
local writable_path = getwritablecachepath ()
local luanames, lucnames, rest = collect_cache(writable_path)
separator ()
print_cache ("writable path", writable_path,
luanames, lucnames, rest)
texiowrite_nl""
for i=1,#readable_paths do
local readable_path = readable_paths[i]
if readable_path ~= writable_path then
local luanames, lucnames = collect_cache (readable_path)
print_cache ("readable path",
readable_path, luanames, lucnames, rest)
end
end
separator()
return true
end
-----------------------------------------------------------------------
--- export functionality to the namespace “fonts.names”
-----------------------------------------------------------------------
names.scan_dir = scan_dir
names.flush_lookup_cache = flush_lookup_cache
names.save_lookups = save_lookups
names.load = load_names
names.save = save_names
names.update = update_names
names.crude_file_lookup = crude_file_lookup
names.crude_file_lookup_verbose = crude_file_lookup_verbose
names.read_blacklist = read_blacklist
names.sanitize_string = sanitize_string
names.getfilename = resolve_fullpath
--- font cache
names.purge_cache = purge_cache
names.erase_cache = erase_cache
names.show_cache = show_cache
--- replace the resolver from luatex-fonts
if config.luaotfload.resolver == "cached" then
report("both", 2, "cache", "caching of name: lookups active")
names.resolve = resolve_cached
names.resolvespec = resolve_cached
else
names.resolve = resolve
names.resolvespec = resolve
end
names.find_closest = find_closest
-- for testing purpose
names.read_fonts_conf = read_fonts_conf
-- vim:tw=71:sw=4:ts=4:expandtab
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