| Current File : //usr/share/texlive/texmf-dist/tex/luatex/luaotfload/luaotfload-database.lua |
-----------------------------------------------------------------------
-- FILE: luaotfload-database.lua
-- DESCRIPTION: part of luaotfload / luaotfload-tool / font database
-----------------------------------------------------------------------
do -- block to avoid to many local variables error
assert(luaotfload_module, "This is a part of luaotfload and should not be loaded independently") {
name = "luaotfload-database",
version = "3.17", --TAGVERSION
date = "2021-01-08", --TAGDATE
description = "luaotfload submodule / database",
license = "GPL v2.0",
author = "Khaled Hosny, Elie Roux, Philipp Gesang, Marcel Krüger",
copyright = "Luaotfload Development Team",
}
end
--[[doc--
With version 2.7 we killed of the Fontforge libraries in favor of
the Lua implementation of the OT format reader. There were many
reasons to do this on top of the fact that FF won’t be around at
version 1.0 anymore: In addition to maintainability, memory safety
and general code hygiene, the new reader shows an amazing
performance: Scanning of the 3200 font files on my system takes
around 23 s now, as opposed to 74 s with the Fontforge libs. Memory
usage has improved drastically as well, as illustrated by these
profiles:
GB
1.324^ #
| #
| ::#
| : #::
| @: #:
| @: #:
| @@@: #:
| @@@ @: #:
| @@ @ @ @: #:
| @ @@:@ @ @: #: :
| @@ : @ :@ @ @: #: :
| @@: ::@@ :@@ ::@ :@ @ @: #: : :::
| @@ : :: @@ :@ : @ :@ @ @: #: : :: :
| @@ : ::: @@ :@ ::: @ :@ @ @: #: :: :: :
| @@@@ :: :::: @@ :@ : : @ :@ @ @: #: :: :::: ::
| :@ @@ :: :::: @@ :@ : :: : @ :@ @ @: #: :: :: :: ::
| @:@ @@ :: ::::: @@ :@ : :::: : @ :@ @ @: #: :::: :::: :: ::
| @@:@ @@ :: ::::::: @@ :@ : : :: : @ :@ @ @: #: ::: @: :: :: ::@
| @@@:@ @@ :: :: ::::: @@ :@ ::: :: : @ :@ @ @: #: ::: @: :: :: ::@
| @@@@@:@ @@ ::::::: ::::: @@ :@ ::: :: : @ :@ @ @: #: ::: ::@: :: :: ::@
0 +----------------------------------------------------------------------->GB
0 16.29
This is the memory usage during a complete database rebuild with
the Fontforge libraries. The same action using the new
``getinfo()`` method gives a different picture:
MB
43.37^ #
| @ @ @#
| @@ @ @ @# :
| @@@ : @: @ @ @# :
| @ @@@ : : @: @ @: :@# :
| @ @ @@@ : : @: @ @: :@# :
| @ : : :@ @@@:::: @::@ @: :@#:: :
| :: : @ : @ : :::@ @ :@@@:::::@::@ @:::@#::::
| : @ : :: : :@:: :@: :::::@ @ :@@@:::::@::@:@:::@#::::
| :: :@ : @ ::@:@:::@:: :@: :::::@: :@ :@@@:::::@::@:@:::@#::::
| :: :@::: :@ ::@:@: :@::::@::::::::@:::@::@@@:::::@::@:@:::@#::::
| :@::::@::: :@:::@:@: :@::::@::::::::@:::@::@@@:::::@::@:@:::@#::::
| :::::@::::@::: :@:::@:@: :@::::@::::::::@:::@::@@@:::::@::@:@:::@#::::
| ::: :@::::@::: :@:::@:@: :@::::@::::::::@:::@::@@@:::::@::@:@:::@#::::
| :::: :@::::@::: :@:::@:@: :@::::@::::::::@:::@::@@@:::::@::@:@:::@#::::
| :::: :@::::@::: :@:::@:@: :@::::@::::::::@:::@::@@@:::::@::@:@:::@#::::
| :::: :@::::@::: :@:::@:@: :@::::@::::::::@:::@::@@@:::::@::@:@:::@#::::
| :::: :@::::@::: :@:::@:@: :@::::@::::::::@:::@::@@@:::::@::@:@:::@#::::
| :::: :@::::@::: :@:::@:@: :@::::@::::::::@:::@::@@@:::::@::@:@:::@#::::
| :::: :@::::@::: :@:::@:@: :@::::@::::::::@:::@::@@@:::::@::@:@:::@#::::
0 +----------------------------------------------------------------------->GB
0 3.231
FF peaks at around 1.4 GB after 12.5 GB worth of allocations,
whereas the Lua implementation arrives at around 45 MB after 3.2 GB
total:
impl time(B) total(B) useful-heap(B) extra-heap(B)
fontforge 12,496,407,184 1,421,150,144 1,327,888,638 93,261,506
lua 3,263,698,960 45,478,640 37,231,892 8,246,748
Much of the inefficiency of Fontforge is a direct consequence of
having to parse the entire font to extract what essentially boils
down to a couple hundred bytes of metadata per font. Since some
information like design sizes (oh, Adobe!) is stuffed away in
Opentype tables, the vastly more efficient approach of
fontloader.info() proves insufficient for indexing. Thus, we ended
up using fontloader.open() which causes even the character tables
to be parsed, which incidentally are responsible for most of the
allocations during that peak of 1.4 GB measured above, along with
the encodings:
20.67% (293,781,048B) 0x6A8F72: SplineCharCreate (splineutil.c:3878)
09.82% (139,570,318B) 0x618ACD: _FontViewBaseCreate (fontviewbase.c:84)
08.77% (124,634,384B) 0x6A8FB3: SplineCharCreate (splineutil.c:3885)
04.53% (64,436,904B) in 80 places, all below massif's threshold (1.00%)
02.68% (38,071,520B) 0x64E14E: addKernPair (parsettfatt.c:493)
01.04% (14,735,320B) 0x64DE7D: addPairPos (parsettfatt.c:452)
39.26% (557,942,484B) 0x64A4E0: PsuedoEncodeUnencoded (parsettf.c:5706)
What gives? For 2.7 we expect a rougher transition than a year back
due to the complete revamp of the OT loading code. Breakage of
fragile aspects like font and style names has been anticipated and
addressed prior to the 2016 pretest release. In contrast to the
earlier approach of letting FF do a complete dump and then harvest
identifiers from the output we now have to coordinate with upstream
as to which fields are actually needed in order to provide a
similarly acceptable name → file lookup. On the bright side, these
things are a lot simpler to fix than the rather tedious work of
having users update their Luatex binary =)
--doc]]--
local lpeg = require "lpeg"
local P, lpegmatch = lpeg.P, lpeg.match
local log = luaotfload.log
local logreport = log and log.report or print -- overriden later on
local report_status = log.names_status
local report_status_start = log.names_status_start
local report_status_stop = log.names_status_stop
--- Luatex builtins
local load = load
local next = next
local require = require
local tonumber = tonumber
local unpack = table.unpack
local fonts = fonts or { }
do
local fontshandlers = fonts.handlers or { }
fonts.handlers = fontshandlers
end
local otfhandler = fonts.handlers.otf or { }
local gzipload = gzip.load
local gzipsave = gzip.save
local iolines = io.lines
local ioopen = io.open
local kpseexpand_path = kpse.expand_path
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 osgetenv = os.getenv
local osgettimeofday = os.gettimeofday
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 tableconcat = table.concat
local tablesort = table.sort
local utf8len = utf8.len
local utf8offset = utf8.offset
--- these come from Lualibs/Context
local context_environment = luaotfload.fontloader
local caches = context_environment.caches
local filebasename = file.basename
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 filesuffix = file.suffix
local getwritablepath = caches.getwritablepath
local lfsisdir = lfs.isdir
local lfsisfile = lfs.isfile
local lfsmkdirs = lfs.mkdirs
local lpegsplitat = lpeg.splitat
local stringis_empty = string.is_empty
local stringsplit = string.split
local stringstrip = string.strip
local tableappend = table.append
local tablecontains = table.contains
local tablecopy = table.copy
local tablefastcopy = table.fastcopy
local tabletofile = table.tofile
local tableserialize = table.serialize
local names = fonts and fonts.names or { }
local resolversfindfile = context_environment.resolvers.findfile
--- some of our own
local unicode = require'luaotfload-unicode'
local casefold = unicode.casefold
local alphnum_only = unicode.alphnum_only
local name_index = nil --> upvalue for names.data
local lookup_cache = nil --> for names.lookups
--- string -> (string * string)
local function make_luanames (path)
return filereplacesuffix(path, "lua"),
filereplacesuffix(path, "luc")
end
local format_precedence = {
"otf", "ttc", "ttf", "afm", "pfb"
}
local location_precedence = {
"local", "system", "texmf",
}
local function set_location_precedence (precedence)
location_precedence = precedence
end
--[[doc--
Auxiliary functions
--doc]]--
--- fontnames contain all kinds of garbage; as a precaution we
--- lowercase and strip them of non alphanumerical characters
--- string -> string
local macroman2utf8 do
local mapping = {
[0x80] = 0x00C4, [0x81] = 0x00C5, [0x82] = 0x00C7, [0x83] = 0x00C9,
[0x84] = 0x00D1, [0x85] = 0x00D6, [0x86] = 0x00DC, [0x87] = 0x00E1,
[0x88] = 0x00E0, [0x89] = 0x00E2, [0x8A] = 0x00E4, [0x8B] = 0x00E3,
[0x8C] = 0x00E5, [0x8D] = 0x00E7, [0x8E] = 0x00E9, [0x8F] = 0x00E8,
[0x90] = 0x00EA, [0x91] = 0x00EB, [0x92] = 0x00ED, [0x93] = 0x00EC,
[0x94] = 0x00EE, [0x95] = 0x00EF, [0x96] = 0x00F1, [0x97] = 0x00F3,
[0x98] = 0x00F2, [0x99] = 0x00F4, [0x9A] = 0x00F6, [0x9B] = 0x00F5,
[0x9C] = 0x00FA, [0x9D] = 0x00F9, [0x9E] = 0x00FB, [0x9F] = 0x00FC,
[0xA0] = 0x2020, [0xA1] = 0x00B0, [0xA2] = 0x00A2, [0xA3] = 0x00A3,
[0xA4] = 0x00A7, [0xA5] = 0x2022, [0xA6] = 0x00B6, [0xA7] = 0x00DF,
[0xA8] = 0x00AE, [0xA9] = 0x00A9, [0xAA] = 0x2122, [0xAB] = 0x00B4,
[0xAC] = 0x00A8, [0xAD] = 0x2260, [0xAE] = 0x00C6, [0xAF] = 0x00D8,
[0xB0] = 0x221E, [0xB1] = 0x00B1, [0xB2] = 0x2264, [0xB3] = 0x2265,
[0xB4] = 0x00A5, [0xB5] = 0x00B5, [0xB6] = 0x2202, [0xB7] = 0x2211,
[0xB8] = 0x220F, [0xB9] = 0x03C0, [0xBA] = 0x222B, [0xBB] = 0x00AA,
[0xBC] = 0x00BA, [0xBD] = 0x03A9, [0xBE] = 0x00E6, [0xBF] = 0x00F8,
[0xC0] = 0x00BF, [0xC1] = 0x00A1, [0xC2] = 0x00AC, [0xC3] = 0x221A,
[0xC4] = 0x0192, [0xC5] = 0x2248, [0xC6] = 0x2206, [0xC7] = 0x00AB,
[0xC8] = 0x00BB, [0xC9] = 0x2026, [0xCA] = 0x00A0, [0xCB] = 0x00C0,
[0xCC] = 0x00C3, [0xCD] = 0x00D5, [0xCE] = 0x0152, [0xCF] = 0x0153,
[0xD0] = 0x2013, [0xD1] = 0x2014, [0xD2] = 0x201C, [0xD3] = 0x201D,
[0xD4] = 0x2018, [0xD5] = 0x2019, [0xD6] = 0x00F7, [0xD7] = 0x25CA,
[0xD8] = 0x00FF, [0xD9] = 0x0178, [0xDA] = 0x2044, [0xDB] = 0x20AC,
[0xDC] = 0x2039, [0xDD] = 0x203A, [0xDE] = 0xFB01, [0xDF] = 0xFB02,
[0xE0] = 0x2021, [0xE1] = 0x00B7, [0xE2] = 0x201A, [0xE3] = 0x201E,
[0xE4] = 0x2030, [0xE5] = 0x00C2, [0xE6] = 0x00CA, [0xE7] = 0x00C1,
[0xE8] = 0x00CB, [0xE9] = 0x00C8, [0xEA] = 0x00CD, [0xEB] = 0x00CE,
[0xEC] = 0x00CF, [0xED] = 0x00CC, [0xEE] = 0x00D3, [0xEF] = 0x00D4,
[0xF0] = 0xF8FF, [0xF1] = 0x00D2, [0xF2] = 0x00DA, [0xF3] = 0x00DB,
[0xF4] = 0x00D9, [0xF5] = 0x0131, [0xF6] = 0x02C6, [0xF7] = 0x02DC,
[0xF8] = 0x00AF, [0xF9] = 0x02D8, [0xFA] = 0x02D9, [0xFB] = 0x02DA,
[0xFC] = 0x00B8, [0xFD] = 0x02DD, [0xFE] = 0x02DB, [0xFF] = 0x02C7,
}
function macroman2utf8(s)
local bytes = {string.byte(s, 1, -1)}
for i=1,#bytes do
bytes[i] = mapping[bytes[i]] or bytes[i]
end
return utf8.char(table.unpack(bytes))
end
end
local function sanitize_fontname (str)
if str ~= nil then
str = utf8len(str) and str or macroman2utf8(str)
str = alphnum_only(casefold(str, true))
return str
end
return nil
end
local function sanitize_fontnames (rawnames)
local result = { }
for category, namedata in next, rawnames do
if type (namedata) == "string" then
namedata = utf8len(namedata) and namedata or macroman2utf8(namedata)
result [category] = alphnum_only(casefold(namedata, true))
else
local target = { }
for field, name in next, namedata do
name = utf8len(name) and name or macroman2utf8(name)
target [field] = alphnum_only(casefold(name, true))
end
result [category] = target
end
end
return result
end
local function find_files_indeed (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 function dummyfilter () 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 function find_files (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 = {
families : familytable;
fontnames : fontnametable;
files : filemap;
status : filestatus;
mappings : fontentry list;
meta : metadata;
}
and familytable = {
local : (format, familyentry) hash; // specified with include dir
texmf : (format, familyentry) hash;
system : (format, familyentry) hash;
}
and familyentry = {
r : sizes; // regular
i : sizes; // italic
b : sizes; // bold
bi : sizes; // bold italic
}
and sizes = {
default : int; // points into mappings or names
optical : (int, int) list; // design size -> index entry
}
and fontnametable = {
local : (format, index) hash;
texmf : (format, index) hash;
system : (format, index) hash;
}
and metadata = {
created : string // creation time
formats : string list; // { "otf", "ttf", "ttc" }
local : bool; (* set if local fonts were added to the db *)
modified : string // modification time
statistics : TODO; // created when built with "--stats"
version : float; // index version
}
and filemap = { // created by generate_filedata()
base : {
local : (string, int) hash; // basename -> idx
system : (string, int) hash;
texmf : (string, int) hash;
};
bare : {
local : (string, (string, int) hash) hash; // location -> (barename -> idx)
system : (string, (string, int) hash) hash;
texmf : (string, (string, int) hash) hash;
};
full : (int, string) hash; // idx -> full path
}
and fontentry = { // finalized by collect_families()
basename : string; // file name without path "foo.otf"
conflicts : { barename : int; basename : int }; // filename conflict with font at index; happens with subfonts
familyname : string; // sanitized name of the font family the font belongs to, usually from the names table
fontname : string; // sanitized name of the font
format : string; // "otf" | "ttf" | "afm" (* | "pfb" *)
fullname : string; // sanitized full name of the font including style modifiers
fullpath : string; // path to font in filesystem
index : int; // index in the mappings table
italicangle : float; // italic angle; non-zero with oblique faces
location : string; // "texmf" | "system" | "local"
plainname : string; // unsanitized font name
typographicsubfamily : string; // sanitized preferred subfamily (names table 14)
psname : string; // PostScript name
size : (false | float * float * float); // if available, size info from the size table converted from decipoints
subfamily : string; // sanitized subfamily (names table 2)
subfont : (int | bool); // integer if font is part of a TrueType collection ("ttc")
version : string; // font version string
weight : int; // usWeightClass
}
and filestatus = (string, // fullname
{ index : int list; // pointer into mappings
timestamp : int; }) dict
beware that this is a reconstruction and may be incomplete or out of
date. Last update: 2014-04-06, describing version 2.51.
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]]--
--- string list -> string option -> dbobj
local function initialize_namedata (formats, created)
local now = os.date "%Y-%m-%d %H:%M:%S" --- i. e. "%F %T" on POSIX systems
return {
status = { }, -- was: status; map abspath -> mapping
mappings = { }, -- TODO: check if still necessary after rewrite
files = { }, -- created later
meta = {
created = created or now,
formats = formats,
["local"] = false,
modified = now,
statistics = { },
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 function load_lua_file (path)
local foundname = filereplacesuffix (path, "luc")
local code = nil
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 --- probe gzipped file
foundname = filereplacesuffix (path, "lua.gz")
local chunk = gzipload (foundname)
if chunk then
code = load (chunk, "t")
end
end
if not code then return nil, nil end
return foundname, code ()
end
--- define locals in scope
local get_font_filter
local lookup_font_name
local reload_db
local lookup_fullpath
local save_lookups
local save_names
local set_font_filter
local update_names
--- state of the database
local fonts_reloaded = false
--- limit output when approximate font matching (luaotfload-tool -F)
local fuzzy_limit = 1 --- display closest only
--- bool? -> -> bool? -> dbobj option
local function load_names (dry_run, no_rebuild)
local starttime = osgettimeofday ()
local foundname, data = load_lua_file (config.luaotfload.paths.index_path_lua)
if data then
logreport ("log", 0, "db",
"Font names database loaded from %s", foundname)
logreport ("term", 3, "db",
"Font names database loaded from %s", foundname)
logreport ("info", 3, "db", "Loading took %0.f ms.",
1000 * (osgettimeofday () - starttime))
local db_version, names_version
if data.meta then
db_version = data.meta.version
else
--- Compatibility branch; the version info used to be
--- stored in the table root which is why updating from
--- an earlier index version broke.
db_version = data.version or -42 --- invalid
end
names_version = names.version
if db_version ~= names_version then
if math.tointeger(db_version) then
logreport ("both", 0, "db",
[[Version mismatch; expected %d, got %d.]],
names_version, db_version)
else
logreport ("both", 0, "db",
[[Version mismatch; expected %d, got invalid data.]],
names_version, db_version)
end
if not fonts_reloaded then
logreport ("both", 0, "db", [[Force rebuild.]])
data = update_names (initialize_namedata (get_font_filter ()),
true, false)
if not data then
logreport ("both", 0, "db",
"Database creation unsuccessful.")
end
end
end
else
if no_rebuild == true then
logreport ("both", 2, "db",
[[Database does not exist, skipping rebuild though.]])
return false
end
logreport ("both", 0, "db",
[[Font names database not found, generating new one.]])
logreport ("both", 0, "db",
[[This can take several minutes; please be patient.]])
data = update_names (initialize_namedata (get_font_filter ()),
nil, dry_run)
if not data then
logreport ("both", 0, "db", "Database creation unsuccessful.")
end
end
return data
end
--[[doc--
access_font_index -- Provide a reference of the index table. Will
cause the index to be loaded if not present.
--doc]]--
local function access_font_index ()
if not name_index then name_index = load_names () end
return name_index
end
local function getmetadata ()
if not name_index then
name_index = load_names (false, true)
if name_index then return tablefastcopy (name_index.meta) end
end
return false
end
--- unit -> unit
local function load_lookups ( )
local foundname, data = load_lua_file(config.luaotfload.paths.lookup_path_lua)
if data then
logreport ("log", 0, "cache", "Lookup cache loaded from %s.", foundname)
logreport ("term", 3, "cache",
"Lookup cache loaded from %s.", foundname)
else
logreport ("both", 1, "cache",
"No lookup cache, creating empty.")
data = { }
end
lookup_cache = data
end
local regular_synonym = {
book = true,
normal = true,
plain = true,
regular = true,
roman = true,
}
local style_synonym = {
oblique = 'i',
slanted = 'i',
italic = 'i',
boldoblique = 'bi',
boldslanted = 'bi',
bolditalic = 'bi',
bold = 'b',
}
-- MK Determine if casefold search is requested
local casefold_search =
not ({['0'] = true, ['f'] = true, [''] = true})
[(kpse.var_value'texmf_casefold_search' or '1'):sub(1,1)]
-- /MK
local function lookup_filename (filename)
if not name_index then name_index = load_names () end
local files = name_index.files
local basedata = files.base
local baredata = files.bare
for i = 1, #location_precedence do
local location = location_precedence [i]
local basenames = basedata [location]
local barenames = baredata [location]
local idx
if basenames ~= nil then
-- MK Added fallback
idx = basenames [filename]
or casefold_search and basenames [stringlower(filename)]
-- /MK
if idx then
goto done
end
end
if barenames ~= nil then
for j = 1, #format_precedence do
local format = format_precedence [j]
local filemap = barenames [format]
if filemap then
-- MK Added fallback
idx = barenames [format] [filename]
or casefold_search and barenames [format] [stringlower(filename)]
-- /MK
if idx then
break
end
end
end
end
::done::
if idx then
return files.full [idx]
end
end
end
--[[doc--
lookup_font_file -- The ``file:`` are ultimately delegated here.
The lookups are kind of a blunt instrument since they try locating
the file using every conceivable method, which is quite
inefficient. Nevertheless, resolving files that way is rarely the
bottleneck.
--doc]]--
--- string -> string * string * bool
local lookup_font_file
-- MK Added mini scope to avoid variable limit
do
local type1_metrics = { "tfm", "ofm", }
-- /MK
function lookup_font_file (filename)
local found = lookup_filename (filename)
if found and not lfsisfile(found) then
found = nil
end
if not found then
local type = file.suffix(filename)
if type ~= "" then
found = resolversfindfile(filename, type)
end
end
if found then
return found, nil, true
end
for i=1, #type1_metrics do
local format = type1_metrics[i]
if resolversfindfile(filename, format) then
return file.addsuffix(filename, format), format, true
end
end
if not fonts_reloaded and config.luaotfload.db.update_live == true then
return reload_db (stringformat ("File not found: %q.", filename),
lookup_font_file,
filename)
end
return filename, nil, false
end
-- MK
end
-- /MK
--[[doc--
get_font_file -- Look up the file of an entry in the mappings
table. If the index is valid, pass on the name and subfont index
after verifing the existence of the resolved file. This
verification differs depending the index entry’s ``location``
field:
* ``texmf`` fonts are verified using the (slow) function
``kpse.lookup()``;
* other locations are tested by resolving the full path and
checking for the presence of a file there.
--doc]]--
--- int -> bool * (string * int) option
local function get_font_file (index)
local entry = name_index.mappings [index]
if not entry then
return false
end
local basename = entry.basename
if entry.location == "texmf" then
local fullname = resolversfindfile(basename, entry.format)
if fullname then
return true, fullname, entry.subfont
end
else --- system, local
local fullname = name_index.files.full [index]
if lfsisfile (fullname) then
return true, fullname, 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. Again, due to the schizoprenic nature of the
font managment we have to check both the system path and the texmf.
--doc]]--
local function verify_font_file (basename)
local path = lookup_fullpath (basename)
if path and lfsisfile(path) then
return true
end
if resolversfindfile(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
The spec is expected to be 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
lookup_font_name () 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 function hash_request (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)
local function lookup_font_name_cached (specification)
if not lookup_cache then load_lookups () end
local request = hash_request(specification)
logreport ("both", 4, "cache", "Looking for %q in cache ...",
request)
local found = lookup_cache [request]
--- case 1) cache positive ----------------------------------------
if found then --- replay fields from cache hit
logreport ("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
logreport ("both", 4, "cache",
"Cached file not found; resolving again.")
else
logreport ("both", 4, "cache", "Not cached; resolving.")
end
--- case 2) cache negative ----------------------------------------
--- first we resolve normally ...
local filename, subfont = lookup_font_name (specification)
if not filename then
return nil, nil
end
--- ... then we add the fields to the cache ... ...
local entry = { filename, subfont }
logreport ("both", 4, "cache", "New entry: %s.", request)
lookup_cache [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?)
logreport ("both", 5, "cache", "Saving updated cache.")
local success = save_lookups ()
if not success then --- sad, but not critical
logreport ("both", 0, "cache", "Error writing cache.")
end
return filename, subfont
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 function add_to_match (found, size, face)
local continue = true
local optsize = face.size
if optsize and next (optsize) then
local dsnsize, maxsize, minsize
dsnsize = optsize[1]
maxsize = optsize[2]
minsize = optsize[3]
if size ~= nil
and (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
local function choose_closest (distances)
local closest = 2^51
local match
for i = 1, #distances do
local d, index = unpack (distances [i])
if d < closest then
closest = d
match = index
end
end
return match
end
--[[doc--
choose_size -- Pick a font face of appropriate size (in sp) from
the list of family members with matching style. There are three
categories:
1. exact matches: if there is a face whose design size equals
the asked size, it is returned immediately and no further
candidates are inspected.
2. range matches: of all faces in whose design range the
requested size falls the one whose center the requested
size is closest to is returned.
3. out-of-range matches: of all other faces (i. e. whose range
is above or below the asked size) the one is chosen whose
boundary (upper or lower) is closest to the requested size.
4. default matches: if no design size or a design size of zero
is requested, the face with the default size is returned.
--doc]]--
--- int * int * int * int list -> int -> int
local function choose_size (sizes, askedsize)
local inrange = { } --- distance * index list
local norange = { } --- distance * index list
if askedsize ~= 0 then
--- firstly, look for an exactly matching design size or
--- matching range
for i = 1, #sizes do
local dsnsize, high, low, index = unpack (sizes [i])
if dsnsize == askedsize then
--- exact match, this is what we were looking for
return index
elseif askedsize <= low then
--- below range, add to the norange table
local d = low - askedsize
norange [#norange + 1] = { d, index }
elseif askedsize > high then
--- beyond range, add to the norange table
local d = askedsize - high
norange [#norange + 1] = { d, index }
else
--- range match
local d = 0
-- should always be true. Just in case there's some
-- weried fonts out there
if dsnsize > low and dsnsize < high then
d = dsnsize - askedsize
else
d = ((low + high) / 2) - askedsize
end
if d < 0 then
d = -d
end
inrange [#inrange + 1] = { d, index }
end
end
end
::skip::
if #inrange > 0 then
return choose_closest (inrange)
elseif #norange > 0 then
return choose_closest (norange)
elseif sizes.default then
return sizes.default
elseif askedsize == 0 then
return choose_size(sizes, 655360) -- If there is no default size and no size specified, just guess
end
end
--[[doc--
lookup_familyname -- Query the families table for an entry
matching the specification.
The parameters “name” and “style” are pre-sanitized.
--doc]]--
--- spec -> string -> string -> int -> string * int * bool
local function lookup_familyname (specification, name, style, askedsize)
local families = name_index.families
local candidates = nil
local fallback = true
--- arrow code alert
for i = 1, #location_precedence do
local location = location_precedence [i]
local locgroup = families [location]
for j = 1, #format_precedence do
local format = format_precedence [j]
local fmtgroup = locgroup [format]
if fmtgroup then
local familygroup = fmtgroup [name]
if familygroup then
local stylegroup = familygroup [style]
if stylegroup then --- suitable match
candidates = stylegroup
fallback = false
goto done
elseif not candidates then
candidates = familygroup.r
end
end
end
end
end
if not candidates then
return nil, nil
end
::done::
index = choose_size (candidates, askedsize)
local success, resolved, subfont = get_font_file (index)
if not success then
return nil, nil
end
logreport ("info", 2, "db", "Match found: %s(%d).",
resolved, subfont or 0)
return resolved, subfont, fallback
end
local function lookup_fontname (specification, name)
local fontnames = name_index.fontnames
--- arrow code alert
for i = 1, #location_precedence do
local location = location_precedence [i]
local locgroup = fontnames [location]
for j = 1, #format_precedence do
local format = format_precedence [j]
local fmtgroup = locgroup [format]
if fmtgroup then
local index = fmtgroup [name]
if index then
local success, resolved, subfont = get_font_file (index)
if success then
return resolved, subfont
end
end
end
end
end
end
local design_size_dimension --- scale asked size if not using bp
local set_size_dimension --- called from config
do
--- cf. TeXbook p. 57; the index stores sizes pre-scaled from bp to
--- sp. This allows requesting sizes we got from the TeX end
--- without further conversion. For the other options *pt* and *dd*
--- we scale the requested size as though the value in the font was
--- specified in the requested unit.
--- From @zhouyan:
--- Let P be the asked size in pt, and Aᵤ = CᵤP, where u is the
--- designed unit, pt, bp, or dd, and
---
--- Cpt = 1, Cbp = 7200/7227, Cdd = 1157/1238.
---
--- That is, Aᵤ is the asked size in the desired unit. Let D be the
--- de-sign size (assumed to be in the unit of bp) as reported by
--- the font (divided by 10; in all the following we ignore the
--- factor 2^16 ).
---
--- For simplicity, consider only the case of exact match to the
--- design size. That is, we would like to have Aᵤ = D. Let A′ᵤ = αᵤP
--- and D′ = βD be the scaled values used in comparisons. For the
--- comparison to work correctly, we need,
---
--- Aᵤ = D ⟺ A′ᵤ = D′ ,
---
--- and thus αᵤ = βCᵤ. The fix in PR 400 is the case of β = 1. The
--- fix for review is β = 7227/7200, and the value of αᵤ is thus
--- correct for pt, bp, but not for dd.
local dimens = {
bp = false,
pt = 7227 / 7200,
dd = (7227 / 7200) * (1157 / 1238),
}
design_size_dimension = dimens.bp
function set_size_dimension (dim)
local conv = dimens [dim]
if conv ~= nil then
logreport ("both", 4, "db",
"Interpreting design sizes as %q, factor %.6f.",
dim, conv or 1)
design_size_dimension = conv
return
end
logreport ("both", 0, "db",
"Invalid dimension %q requested for design sizes; \z
ignoring.")
end
end
--[[doc--
lookup_font_name -- Perform a name: lookup. This first queries the
font families table and, if there is no match for the spec, the
font names table.
The return value is a pair consisting of the file name and the
subfont index if appropriate..
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 “size” field deserves special attention: if its value is
negative, then it actually specifies a scalefactor of the
design size of the requested font. This happens e.g. if a font is
requested without an explicit “at size”. If the font is part of a
larger collection with different design sizes, this complicates
matters a bit: Normally, the resolver prefers fonts that have a
design size as close as possible to the requested size. If no
size specified, then the design size is implied. But which design
size should that be? Xetex appears to pick the “normal” (unmarked)
size: with Adobe fonts this would be the one that is neither
“caption” nor “subhead” nor “display” &c ... For fonts by Adobe this
seems to be the one that does not receive a “typographicsubfamily”
field. (IOW Adobe uses the “typographicsubfamily” field to encode
the design size in more or less human readable format.) However,
this is not true of LM and EB Garamond. As this matters only where
there are multiple design sizes to a given font/style combination,
we put a workaround in place that chooses that unmarked version.
The first return value of “lookup_font_name” is the file name of the
requested font (string). It can be passed to the fullname resolver
get_font_file().
The second value is either “false” or an integer indicating the
subfont index in a TTC.
--doc]]--
--- table -> string * (int | bool)
function lookup_font_name (specification)
if not name_index then name_index = load_names () end
local name = sanitize_fontname (specification.name)
local style = sanitize_fontname (specification.style) or "r"
local askedsize = specification.optsize
if askedsize then
askedsize = tonumber (askedsize) * 65536
else
askedsize = specification.size
if not askedsize or askedsize < 0 then
askedsize = 0
end
end
if design_size_dimension ~= false then
askedsize = design_size_dimension * askedsize
end
local resolved, subfont, fallback = lookup_familyname (specification,
name,
style,
askedsize)
if not resolved or fallback then
local new_resolved, new_subfont = lookup_fontname (specification,
name,
style)
if new_resolved then
resolved, subfont = new_resolved, new_subfont
end
end
if not resolved then
if not fonts_reloaded and config.luaotfload.db.update_live == true then
return reload_db (stringformat ("Font %q not found.",
specification.name or "<?>"),
lookup_font_name,
specification)
end
end
return resolved, subfont
end
function lookup_fullpath (fontname, ext) --- getfilename()
if not name_index then name_index = load_names () end
local files = name_index.files
local basedata = files.base
local baredata = files.bare
for i = 1, #location_precedence do
local location = location_precedence [i]
local basenames = basedata [location]
local idx
if basenames ~= nil then
-- MK Added fallback
idx = basenames [fontname]
or casefold_search and basenames [stringlower(fontname)]
-- /MK
end
if ext then
local barenames = baredata [location] [ext]
if not idx and barenames ~= nil then
-- MK Added fallback
idx = barenames [fontname]
or casefold_search and barenames [stringlower(fontname)]
-- /MK
end
end
if idx then
return files.full [idx]
end
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
function reload_db (why, caller, ...)
local namedata = name_index
local formats = tableconcat (namedata.meta.formats, ",")
logreport ("both", 0, "db",
"Reload initiated (formats: %s); reason: %s",
formats, why)
set_font_filter (formats)
namedata = update_names (namedata, false, false)
if namedata then
fonts_reloaded = true
name_index = namedata
return caller (...)
end
logreport ("both", 0, "db", "Database update unsuccessful.")
end
--- string -> string -> int
local function iterative_levenshtein (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 list -> string list
local function delete_dupes (lst)
local n0 = #lst
if n0 == 0 then return lst end
tablesort (lst)
local ret = { }
local last
for i = 1, n0 do
local cur = lst[i]
if cur ~= last then
last = cur
ret[#ret + 1] = cur
end
end
logreport (false, 8, "query",
"Removed %d duplicate names.", n0 - #ret)
return ret
end
--- string -> int -> bool
local function find_closest (name, limit)
local name = sanitize_fontname (name)
limit = limit or fuzzy_limit
if not name_index then name_index = load_names () end
if not name_index or type (name_index) ~= "table" then
if not fonts_reloaded then
return reload_db("Font index missing.", 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 = name_index.mappings
local n_fonts = #mappings
for n = 1, n_fonts do
local current = mappings[n]
--[[
This is simplistic but surpisingly fast.
Matching is performed against the “fullname” field
of a db record in preprocessed form. We then store the
raw “fullname” at its edit distance.
We should probably do some weighting over all the
font name categories as well as whatever agrep
does.
--]]
local fullname = current.plainname
local sfullname = current.fullname
local dist = cached[sfullname]--- maybe already calculated
if not dist then
dist = iterative_levenshtein(name, sfullname)
cached[sfullname] = 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
--- 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)
logreport (false, 1, "query",
"Displaying %d distance levels.", limit)
for i = 1, limit do
local dist = distances[i]
local namelst = delete_dupes (by_distance[dist])
logreport (false, 0, "query",
"Distance from %q: %s\n "
.. tableconcat (namelst, "\n "),
name, dist)
end
return true
end
return false
end --- find_closest()
--- string -> uint -> bool * (string | rawdata)
local function read_font_file (filename, subfont)
local fontdata = otfhandler.readers.getinfo (filename,
{ subfont = subfont
, platformnames = true
, rawfamilynames = true
})
local msg = fontdata.comment
if msg then
return false, msg
end
return true, fontdata
end
local function load_font_file (filename, subfont)
local err, ret = read_font_file (filename, subfont)
if err == false then
logreport ("both", 1, "db", "ERROR: failed to open %q: %q.",
tostring (filename), tostring (ret))
return
end
return ret
end
--- Design sizes in the fonts are specified in decipoints. For the
--- index these values are prescaled to sp which is what we’re dealing
--- with at the TeX end.
local get_size_info do --- too many upvalues :/
--- rawdata -> (int * int * int | bool)
local sp = 2^16 -- pt
local bp = 7227 / 7200 -- pt
function get_size_info (rawinfo)
local design_size = rawinfo.design_size
local design_range_top = rawinfo.design_range_top
local design_range_bottom = rawinfo.design_range_bottom
local fallback_size = design_size ~= 0 and design_size
or design_range_bottom ~= 0 and design_range_bottom
or design_range_top ~= 0 and design_range_top
if fallback_size then
design_size = ((design_size or fallback_size) * sp) / 10
design_range_top = ((design_range_top or fallback_size) * sp) / 10
design_range_bottom = ((design_range_bottom or fallback_size) * sp) / 10
design_size = design_size * bp
design_range_top = design_range_top * bp
design_range_bottom = design_range_bottom * bp
return {
design_size, design_range_top, design_range_bottom,
}
end
return false
end
end ---[local get_size_info]
--[[doc--
map_enlish_names -- Names-table for Lua fontloader objects. This
may vanish eventually once we ditch Fontforge completely. Only
subset of entries of that table are actually relevant so we’ll
stick to that part.
--doc]]--
local function get_english_names (metadata)
local namesource
local platformnames = metadata.platformnames
--[[--
Hans added the “platformnames” option for us to access parts of
the original name table. The names are unreliable and
completely disorganized, sure, but the Windows variant of the
field often contains the superior information. Case in point:
["platformnames"]={
["macintosh"]={
["compatiblefullname"]="Garamond Premr Pro Smbd It",
["family"]="Garamond Premier Pro",
["fullname"]="Garamond Premier Pro Semibold Italic",
["postscriptname"]="GaramondPremrPro-SmbdIt",
["subfamily"]="Semibold Italic",
},
["windows"]={
["family"]="Garamond Premr Pro Smbd",
["fullname"]="GaramondPremrPro-SmbdIt",
["postscriptname"]="GaramondPremrPro-SmbdIt",
["subfamily"]="Italic",
["typographicfamily"]="Garamond Premier Pro",
["typographicsubfamily"]="Semibold Italic",
},
},
The essential bit is contained as “typographicfamily” (which we
call for historical reasons the “preferred family”) and the
“subfamily”. Only Why this is the case, only Adobe knows for
certain.
--]]--
if platformnames then
if platformnames.windows and platformnames.macintosh then
return table.merge(platformnames.macintosh, platformnames.windows)
end
namesource = platformnames.windows or platformnames.macintosh
end
return namesource or metadata
end
--[[--
In case of broken PS names we set some dummies.
For this reason we copy what is necessary whilst keeping the table
structure the same as in the tfmdata.
--]]--
local function get_raw_info (metadata, basename)
local fontname = metadata.fontname
local fullname = metadata.fullname
if not fontname or not fullname then
--- Broken names table, e.g. avkv.ttf with UTF-16 strings;
--- we put some dummies in place like the fontloader
--- (font-otf.lua) does.
logreport ("both", 3, "db",
"Invalid names table of font %s, using dummies. \z
Reported: fontname=%q, fullname=%q.",
tostring (basename), tostring (fontname),
tostring (fullname))
fontname = "bad-fontname-" .. basename
fullname = "bad-fullname-" .. basename
end
return {
familyname = metadata.familyname,
fontname = fontname,
fullname = fullname,
italicangle = metadata.italicangle,
names = metadata.names,
units_per_em = metadata.units_per_em,
version = metadata.version,
design_size = metadata.design_size or metadata.designsize,
design_range_top = metadata.design_range_top or metadata.maxsize,
design_range_bottom = metadata.design_range_bottom or metadata.minsize,
}
end
local function organize_namedata (rawinfo,
nametable,
basename,
info)
local default_name = nametable.compatiblefullname
or nametable.fullname
or nametable.postscriptname
or rawinfo.fullname
or rawinfo.fontname
or info.fullname
or info.fontname
local default_family = nametable.typographicfamily
or nametable.family
or rawinfo.familyname
or info.familyname
-- local default_modifier = nametable.typographicsubfamily
-- or nametable.subfamily
local fontnames = {
--- see
--- https://developer.apple.com/fonts/TTRefMan/RM06/Chap6name.html
--- http://www.microsoft.com/typography/OTSPEC/name.htm#NameIDs
english = {
--- where a “compatiblefullname” field is given, the value
--- of “fullname” is either identical or differs by
--- separating the style with a hyphen and omitting spaces.
--- (According to the spec, “compatiblefullname” is
--- “Macintosh only”.) Of the three “fullname” fields, this
--- one appears to be the one with the entire name given in
--- a legible, non-abbreviated fashion, for most fonts at
--- any rate. However, in some fonts (e.g. CMU) all three
--- fields are identical.
fullname = --[[ 18 ]] nametable.compatiblefullname
or --[[ 4 ]] nametable.fullname
or default_name,
--- we keep both the “preferred family” and the “family”
--- values around since both are valid but can turn out
--- quite differently, e.g. with Latin Modern:
--- typographicfamily: “Latin Modern Sans”,
--- family: “LM Sans 10”
family = --[[ 1 ]] nametable.family or default_family,
subfamily = --[[ 2 ]] nametable.subfamily or rawinfo.subfamilyname,
psname = --[[ 6 ]] nametable.postscriptname,
typographicfamily = --[[ 16 ]] nametable.typographicfamily,
typographicsubfamily = --[[ 17 ]] nametable.typographicsubfamily,
},
metadata = {
fullname = rawinfo.fullname,
fontname = rawinfo.fontname,
familyname = rawinfo.familyname,
},
info = {
fullname = info.fullname,
familyname = info.familyname,
fontname = info.fontname,
},
}
return {
sanitized = sanitize_fontnames (fontnames),
fontname = rawinfo.fontname,
fullname = rawinfo.fullname,
familyname = rawinfo.familyname,
}
end
local dashsplitter = lpegsplitat "-"
local function split_fontname (fontname)
--- sometimes the style hides in the latter part of the
--- fontname, separated by a dash, e.g. “Iwona-Regular”,
--- “GFSSolomos-Regular”
local splitted = { lpegmatch (dashsplitter, fontname) }
if next (splitted) then
return sanitize_fontname (splitted [#splitted])
end
end
local function organize_styledata (metadata, rawinfo, info)
local pfminfo = metadata.pfminfo
local names = rawinfo.names
return {
--- see http://www.microsoft.com/typography/OTSPEC/features_pt.htm#size
size = get_size_info (rawinfo),
pfmweight = pfminfo and pfminfo.weight or metadata.pfmweight or 400,
weight = rawinfo.weight or metadata.weight or "unspecified",
split = split_fontname (rawinfo.fontname),
width = pfminfo and pfminfo.width or metadata.pfmwidth,
italicangle = metadata.italicangle,
--- this is for querying, see www.ntg.nl/maps/40/07.pdf for details
units_per_em = metadata.units_per_em or metadata.units,
version = metadata.version,
}
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
local function ot_fullinfo (filename,
subfont,
location,
basename,
format,
info)
local metadata = load_font_file (filename, subfont)
if not metadata then
return nil
end
local rawinfo = get_raw_info (metadata, basename)
local nametable = get_english_names (metadata)
local namedata = organize_namedata (rawinfo,
nametable,
basename,
info)
local style = organize_styledata (metadata,
rawinfo,
info)
local res = {
file = { base = basename,
full = filename,
subfont = subfont,
location = location or "system" },
format = format,
names = namedata,
style = style,
version = rawinfo.version,
}
return res
end
--[[doc--
Type1 font inspector. In comparison with OTF, PFB’s contain a good
deal less name fields which makes it tricky in some parts to find a
meaningful representation for the database.
Good read: http://www.adobe.com/devnet/font/pdfs/5004.AFM_Spec.pdf
--doc]]--
--- string -> int -> bool -> string -> fontentry
local function t1_fullinfo (filename, _subfont, location, basename, format)
local sanitized
local metadata = load_font_file (filename)
local fontname = metadata.fontname
local fullname = metadata.fullname
local familyname = metadata.familyname
local italicangle = metadata.italicangle
local style = ""
local weight
sanitized = sanitize_fontnames ({
fontname = fontname,
psname = fullname,
familyname = familyname,
weight = metadata.weight, --- string identifier
typographicsubfamily = style,
})
weight = sanitized.weight
if weight == "bold" then
style = weight
end
if italicangle ~= 0 then
style = style .. "italic"
end
return {
basename = basename,
fullpath = filename,
subfont = false,
location = location or "system",
format = format,
fullname = sanitized.fullname,
fontname = sanitized.fontname,
familyname = sanitized.familyname,
plainname = fullname,
psname = sanitized.fontname,
version = metadata.version,
size = false,
typographicsubfamily = style ~= "" and style or weight,
weight = metadata.pfminfo and pfminfo.weight or 400,
italicangle = italicangle,
}
end
local loaders = {
otf = ot_fullinfo,
ttc = ot_fullinfo,
ttf = ot_fullinfo,
afm = t1_fullinfo,
pfb = t1_fullinfo,
}
--- not side-effect free!
local function compare_timestamps (fullname,
currentstatus,
currententrystatus,
currentmappings,
targetstatus,
targetentrystatus,
targetmappings)
local currenttimestamp = currententrystatus
and currententrystatus.timestamp
local targettimestamp = lfsattributes (fullname, "modification")
if targetentrystatus ~= nil
and targetentrystatus.timestamp == targettimestamp then
logreport ("log", 3, "db", "Font %q already read.", fullname)
return false
end
targetentrystatus.timestamp = targettimestamp
targetentrystatus.index = targetentrystatus.index or { }
if currenttimestamp == targettimestamp
and not targetentrystatus.index [1]
then
--- copy old namedata into new
for _, currentindex in next, currententrystatus.index do
local targetindex = #targetentrystatus.index
local fullinfo = currentmappings [currentindex]
local location = #targetmappings + 1
targetmappings [location] = fullinfo
targetentrystatus.index [targetindex + 1] = location
end
logreport ("log", 3, "db", "Font %q already indexed.", fullname)
return false
end
return true
end
local function insert_fullinfo (fullname,
basename,
n_font,
loader,
format,
location,
targetmappings,
targetentrystatus,
info)
local fullinfo = loader (fullname, n_font,
location, basename,
format, info)
if not fullinfo then
return false
end
local index = targetentrystatus.index [n_font]
if not index then
index = #targetmappings + 1
end
targetmappings [index] = fullinfo
targetentrystatus.index [n_font] = index
return true
end
--- we return true if the font is new or re-indexed
--- string -> dbobj -> dbobj -> bool
local function read_font_names (fullname,
currentnames,
targetnames,
location)
local targetmappings = targetnames.mappings
local targetstatus = targetnames.status --- by full path
local targetentrystatus = targetstatus [fullname]
if targetentrystatus == nil then
targetentrystatus = { }
targetstatus [fullname] = targetentrystatus
end
local currentmappings = currentnames.mappings
local currentstatus = currentnames.status
local currententrystatus = currentstatus [fullname]
local basename = filebasename (fullname)
local barename = filenameonly (fullname)
local entryname = fullname
if location == "texmf" then
entryname = basename
end
--- 1) skip if blacklisted
if names.blacklist[fullname] or names.blacklist[basename] then
logreport ("log", 2, "db",
"Ignoring blacklisted font %q.", fullname)
return false
end
--- 2) skip if known with same timestamp
if not compare_timestamps (fullname,
currentstatus,
currententrystatus,
currentmappings,
targetstatus,
targetentrystatus,
targetmappings)
then
return false
end
--- 3) new font; choose a loader, abort if unknown
local format = stringlower (filesuffix (basename))
local loader = loaders [format] --- ot_fullinfo, t1_fullinfo
if not loader then
logreport ("both", 0, "db",
"Unknown format: %q, skipping.", format)
return false
end
--- 4) get basic info, abort if fontloader can’t read it
local err, info = read_font_file (fullname)
if err == false then
logreport ("log", 1, "db",
"Failed to read basic information from %q: %q",
basename, tostring (info))
return false
end
--- 5) check for subfonts and process each of them
if type (info) == "table" and #info >= 1 then --- ttc
local success = false --- true if at least one subfont got read
for n_font = 1, #info do
if insert_fullinfo (fullname, basename, n_font,
loader, format, location,
targetmappings, targetentrystatus,
info)
then
success = true
end
end
return success
end
return insert_fullinfo (fullname, basename, false,
loader, format, location,
targetmappings, targetentrystatus,
info)
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 = file.collapsepath or file.collapse_path
--- windows and dos
if os_type == "windows" or os_type == "msdos" then
--- ms platfom specific stuff
function path_normalize (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 = filecollapsepath
end
end
local blacklist = { }
local p_blacklist --- prefixes of dirs
--- string list -> string list
local function collapse_prefixes (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 function create_blacklist (blacklist, whitelist)
local result = { }
local dirs = { }
logreport ("info", 2, "db", "Blacklisting %d 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
logreport ("info", 2, "db", "Whitelisting %d 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 = lpeg.Cc(false)
end
return result
end
--- unit -> unit
local function read_blacklist ()
local files = {
kpselookup ("luaotfload-blacklist.cnf",
{all=true, format="tex"})
}
local blacklist = { }
local whitelist = { }
if files and type(files) == "table" then
for _, path in next, files do
for line in iolines (path) do
line = stringstrip(line) -- to get rid of lines like " % foo"
local first_chr = stringsub(line, 1, 1)
if first_chr == "%" or stringis_empty(line) then
-- comment or empty line
elseif first_chr == "-" then
logreport ("both", 3, "db",
"Whitelisted file %q via %q.",
line, path)
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)
logreport ("both", 3, "db",
"Blacklisted file %q via %q.",
line, path)
blacklist[#blacklist+1] = line
end
end
end
end
names.blacklist = create_blacklist(blacklist, whitelist)
end
local p_font_filter
do
local function extension_pattern (list)
if type (list) ~= "table" or #list == 0 then return P(-1) end
local pat
for i=#list, 1, -1 do
local e = list[i]
if not pat then
pat = P(e)
else
pat = pat + P(e)
end
end
pat = pat * P(-1)
return (1 - pat)^1 * pat
end
--- small helper to adjust the font filter pattern (--formats
--- option)
local current_formats = { }
local splitcomma = luaotfload.parsers.splitcomma
function set_font_filter (formats)
if not formats or type (formats) ~= "string" then
return
end
if stringsub (formats, 1, 1) == "+" then -- add
formats = lpegmatch (splitcomma, stringsub (formats, 2))
if formats then
current_formats = tableappend (current_formats, formats)
end
elseif stringsub (formats, 1, 1) == "-" then -- remove
formats = lpegmatch (splitcomma, stringsub (formats, 2))
if formats then
local newformats = { }
for i = 1, #current_formats do
local fmt = current_formats[i]
for j = 1, #formats do
if current_formats[i] == formats[j] then
goto skip
end
end
newformats[#newformats+1] = fmt
::skip::
end
current_formats = newformats
end
else -- set
formats = lpegmatch (splitcomma, formats)
if formats then
current_formats = formats
end
end
p_font_filter = extension_pattern (current_formats)
end
function get_font_filter (formats)
return tablefastcopy (current_formats)
end
end
local function locate_matching_pfb (afmfile, dir)
local pfbname = filereplacesuffix (afmfile, "pfb")
local pfbpath = dir .. "/" .. pfbname
if lfsisfile (pfbpath) then
return pfbpath
end
--- Check for match in texmf too
return kpsefind_file (pfbname, "type1 fonts")
end
local function process_dir_tree (acc, dirs, done)
if not next (dirs) then --- done
return acc
end
local pwd = lfscurrentdir ()
local dir = dirs[#dirs]
dirs[#dirs] = nil
if not lfschdir (dir) then
--- Cannot cd; skip.
return process_dir_tree (acc, dirs, done)
end
dir = lfscurrentdir () --- resolve symlinks
lfschdir (pwd)
if tablecontains (done, dir) then
--- Already traversed. Note that it’d be unsafe to rely on the
--- hash part above due to Lua only processing up to 32 bytes
--- of string data. The lookup shouldn’t impact performance too
--- much but we could check the performance of alternative data
--- structures at some point.
return process_dir_tree (acc, dirs, done)
end
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
ent = stringlower (ent)
if lpegmatch (p_font_filter, ent) then
if filesuffix (ent) == "afm" then
local pfbpath = locate_matching_pfb (ent, dir)
if pfbpath then
newfiles[#newfiles+1] = pfbpath
end
end
newfiles[#newfiles+1] = fullpath
end
end
end
end
done [#done + 1] = dir
return process_dir_tree (tableappend (acc, newfiles), dirs, done)
end
local function process_dir (dir)
local pwd = lfscurrentdir ()
if lfschdir (dir) then
dir = lfscurrentdir () --- resolve symlinks
lfschdir (pwd)
local files = { }
local blacklist = names.blacklist
for ent in lfsdir (dir) do
if ent ~= "." and ent ~= ".." and not blacklist[ent] then
local fullpath = dir .. "/" .. ent
if lfsisfile (fullpath) then
ent = stringlower (ent)
if lpegmatch (p_font_filter, ent)
then
if filesuffix (ent) == "afm" then
local pfbpath = locate_matching_pfb (ent, dir)
if pfbpath then
files[#files+1] = pfbpath
end
else
files[#files+1] = fullpath
end
end
end
end
end
return files
end
return { }
end
--- string -> bool -> string list
local function find_font_files (root, recurse)
if lfsisdir (root) then
if recurse == true then
return process_dir_tree ({}, { root }, {})
else --- kpathsea already delivered the necessary subdirs
return process_dir (root)
end
end
end
--- truncate_string -- Cut the first part of a string to fit it
--- into a given terminal width. The parameter “restrict” (int)
--- indicates the number of characters already consumed on the
--- line.
local function truncate_string (str, restrict)
local tw = config.luaotfload.misc.termwidth
local wd = tw - restrict
local len = utf8len (str)
if not len then
-- str is not valid UTF-8... We will assume a 8-bit
-- encoding and forward it verbatim to the output.
len = #str
if wd - len < 0 then
str = ".." .. stringsub(str, len - wd + 2)
end
elseif wd - len < 0 then
--- combined length exceeds terminal,
str = ".." .. stringsub(str, utf8offset(str, - wd + 2))
end
return str
end
--[[doc--
collect_font_filenames_dir -- Traverse the directory root at
``dirname`` looking for font files. Returns a list of {*filename*;
*location*} pairs.
--doc]]--
--- string -> string -> string * string list
local function collect_font_filenames_dir (dirname, location)
if lpegmatch (p_blacklist, dirname) then
logreport ("both", 4, "db",
"Skipping blacklisted directory %s.", dirname)
--- ignore
return { }
end
local found = find_font_files (dirname, location ~= "texmf" and location ~= "local")
if not found then
logreport ("both", 4, "db",
"No such directory: %q; skipping.", dirname)
return { }
end
local nfound = #found
local files = { }
logreport ("both", 4, "db",
"%d font files detected in %s.",
nfound, dirname)
for j = 1, nfound do
local fullname = found[j]
files[#files + 1] = { path_normalize (fullname), location }
end
return files
end
local stripslashes = luaotfload.parsers.stripslashes
--- string list -> string list
local function filter_out_pwd (dirs)
local result = { }
local pwd = path_normalize (lpegmatch (stripslashes,
lfscurrentdir ()))
for i = 1, #dirs do
--- better safe than sorry
local dir = path_normalize (lpegmatch (stripslashes, dirs[i]))
if dir == "." or dir == pwd then
logreport ("both", 3, "db",
"Path %q matches $PWD (%q), skipping.",
dir, pwd)
else
result[#result+1] = dir
end
end
return result
end
local path_separator = os.type == "windows" and ";" or ":"
--[[doc--
collect_font_filenames_texmf -- Scan texmf tree for font files
relying on kpathsea search paths for the respective file types.
The current working directory comes as “.” (texlive) or absolute
path (miktex) and will always be filtered out.
Returns a list of { *filename*; *location* } pairs.
--doc]]--
--- unit -> string * string list
local function collect_font_filenames_texmf ()
local osfontdir = kpseexpand_path "$OSFONTDIR"
if stringis_empty (osfontdir) then
logreport ("both", 1, "db", "Scanning TEXMF for fonts...")
else
logreport ("both", 1, "db", "Scanning TEXMF and $OSFONTDIR for fonts...")
if log.get_loglevel () > 3 then
local osdirs = filesplitpath (osfontdir)
logreport ("both", 0, "db", "$OSFONTDIR has %d entries:", #osdirs)
for i = 1, #osdirs do
logreport ("both", 0, "db", "[%d] %s", i, osdirs[i])
end
end
end
local show_path = kpse.show_path
local function expanded_path (file_type)
return kpseexpand_path (show_path (file_type))
end
local fontdirs = expanded_path "opentype fonts"
fontdirs = fontdirs .. path_separator .. expanded_path "truetype fonts"
fontdirs = fontdirs .. path_separator .. expanded_path "type1 fonts"
fontdirs = fontdirs .. path_separator .. expanded_path "afm"
fontdirs = filesplitpath (fontdirs) or { }
local tasks = filter_out_pwd (fontdirs)
logreport ("both", 3, "db",
"Initiating scan of %d directories.", #tasks)
local files = { }
for _, dir in next, tasks do
files = tableappend (files, collect_font_filenames_dir (dir, "texmf"))
end
logreport ("both", 3, "db", "Collected %d files.", #files)
return files
end
--- 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 = osgetenv("WINDIR")
local appdata = osgetenv("LOCALAPPDATA")
if chgstrcp and kpse.var_value('command_line_encoding') ~= nil then
return { filejoin(windir, 'Fonts'), chgstrcp.syscptoutf8(filejoin(appdata, 'Microsoft/Windows/Fonts')) }
else
return { filejoin(windir, 'Fonts'), filejoin(appdata, 'Microsoft/Windows/Fonts') }
end
else
local fonts_conves = { --- plural, much?
"/usr/local/etc/fonts/fonts.conf",
"/etc/fonts/fonts.conf",
}
local os_dirs = luaotfload.parsers.read_fonts_conf(fonts_conves, find_files)
return os_dirs
end
return {}
end
--[[doc--
count_removed -- Count paths that do not exist in the file system.
--doc]]--
--- string list -> size_t
local function count_removed (files)
if not files or not files.full then
logreport ("log", 4, "db", "Empty file store; no data to work with.")
return 0
end
local old = files.full
logreport ("log", 4, "db", "Checking removed files.")
local nrem = 0
local nold = #old
for i = 1, nold do
local f = old[i]
if not kpsereadable_file (f) then
logreport ("log", 2, "db",
"File %q does not exist in file system.")
nrem = nrem + 1
end
end
return nrem
end
--[[doc--
retrieve_namedata -- Scan the list of collected fonts and populate
the list of namedata.
· dirname : name of the directory to scan
· currentnames : current font db object
· targetnames : font db object to fill
· dry_run : don’t touch anything
Returns the number of fonts that were actually added to the index.
--doc]]--
--- string * string list -> dbobj -> dbobj -> bool? -> int * int
local function retrieve_namedata (files, currentnames, targetnames, dry_run)
local nfiles = #files
local nnew = 0
logreport ("info", 1, "db", "Scanning %d collected font files ...", nfiles)
local bylocation = { texmf = { 0, 0 }
, ["local"] = { 0, 0 }
, system = { 0, 0 }
}
report_status_start (2, 4)
for i = 1, nfiles do
local fullname, location = unpack (files[i])
local count = bylocation[location]
count[1] = count[1] + 1
if dry_run == true then
local truncated = truncate_string (fullname, 43)
logreport ("log", 2, "db", "Would have been loading %s.", fullname)
report_status ("term", "db", "Would have been loading %s", truncated)
--- skip the read_font_names part
else
local truncated = truncate_string (fullname, 32)
logreport ("log", 2, "db", "Loading font %s.", fullname)
report_status ("term", "db", "Loading font %s", truncated)
local new = read_font_names (fullname, currentnames,
targetnames, location)
if new == true then
nnew = nnew + 1
count[2] = count[2] + 1
end
end
end
report_status_stop ("term", "db", "Scanned %d files, %d new.", nfiles, nnew)
for location, count in next, bylocation do
logreport ("term", 4, "db", " * %s: %d files, %d new",
location, count[1], count[2])
end
return nnew
end
--- unit -> string * string list
local function collect_font_filenames_system ()
local n_scanned, n_new = 0, 0
logreport ("info", 1, "db", "Scanning system fonts...")
logreport ("info", 2, "db",
"Searching in static system directories...")
local files = { }
for _, dir in next, get_os_dirs () do
tableappend (files, collect_font_filenames_dir (dir, "system"))
end
logreport ("term", 3, "db", "Collected %d files.", #files)
return files
end
--- unit -> bool
local function flush_lookup_cache ()
lookup_cache = { }
collectgarbage "collect"
return true
end
--[[doc--
collect_font_filenames_local -- Scan $PWD (during a TeX run)
for font files.
Side effect: This sets the “local” flag in the subtable “meta” to
prevent the merged table from being saved to disk.
TODO the local tree could be cached in $PWD.
--doc]]--
--- unit -> string * string list
local function collect_font_filenames_local ()
local pwd = lfscurrentdir ()
logreport ("both", 1, "db", "Scanning for fonts in $PWD (%q) ...", pwd)
local files = collect_font_filenames_dir (pwd, "local")
local nfiles = #files
if nfiles > 0 then
logreport ("term", 1, "db", "Found %d files.", pwd)
else
logreport ("term", 1, "db",
"Couldn’t find a thing here. What a waste.", pwd)
end
logreport ("term", 3, "db", "Collected %d files.", #files)
return files, nfiles > 0
end
--- fontentry list -> filemap
local function generate_filedata (mappings)
logreport ("both", 2, "db", "Creating filename map.")
local nmappings = #mappings
local files = {
bare = {
["local"] = { },
system = { }, --- mapped to mapping format -> index in full
texmf = { }, --- mapped to mapping format -> “true”
},
base = {
["local"] = { },
system = { }, --- mapped to index in “full”
texmf = { }, --- set; all values are “true”
},
full = { }, --- non-texmf
}
local base = files.base
local bare = files.bare
local full = files.full
local conflicts = {
basenames = 0,
barenames = 0,
}
for index = 1, nmappings do
local entry = mappings [index]
local filedata = entry.file
local format
local location
local fullpath
local basename
local barename
local subfont
if filedata then --- new entry
format = entry.format --- otf, afm, ...
location = filedata.location --- texmf, system, ...
fullpath = filedata.full
basename = filedata.base
barename = filenameonly (fullpath)
subfont = filedata.subfont
else
format = entry.format --- otf, afm, ...
location = entry.location --- texmf, system, ...
fullpath = entry.fullpath
basename = entry.basename
barename = filenameonly (fullpath)
subfont = entry.subfont
end
entry.index = index
--- 1) add to basename table
local inbase = base [location] --- no format since the suffix is known
-- MK Added lowercase versions for case-insensitive fallback
if inbase then
local present = inbase [basename]
if present then
logreport ("both", 4, "db",
"Conflicting basename: %q already indexed \z
in category %s, ignoring.",
barename, location)
conflicts.basenames = conflicts.basenames + 1
--- track conflicts per font
local conflictdata = entry.conflicts
if not conflictdata then
entry.conflicts = { basename = present }
else -- some conflicts already detected
conflictdata.basename = present
end
else
local lowerbasename = stringlower (basename)
if basename ~= lowerbasename then
present = inbase [lowerbasename]
if present then
logreport ("both", 4, "db",
"Conflicting basename: %q already indexed \z
as %s.",
barename, mappings[present].basename)
conflicts.basenames = conflicts.basenames + 1
--- track conflicts per font
local conflictdata = entry.conflicts
if not conflictdata then
entry.conflicts = { basename = present }
else -- some conflicts already detected
conflictdata.basename = present
end
else
inbase [lowerbasename] = index
end
end
inbase [basename] = index
end
else
inbase = { basename = index }
base [location] = inbase
local lowerbasename = stringlower (basename)
if basename ~= lowerbasename then
inbase [lowerbasename] = index
end
end
--- 2) add to barename table
local inbare = bare [location] [format]
if inbare then
local present = inbare [barename]
if present then
logreport ("both", 4, "db",
"Conflicting barename: %q already indexed \z
in category %s/%s, ignoring.",
barename, location, format)
conflicts.barenames = conflicts.barenames + 1
--- track conflicts per font
local conflictdata = entry.conflicts
if not conflictdata then
entry.conflicts = { barename = present }
else -- some conflicts already detected
conflictdata.barename = present
end
else
local lowerbarename = stringlower (barename)
if barename ~= lowerbarename then
present = inbare [lowerbarename]
if present then
logreport ("both", 4, "db",
"Conflicting barename: %q already indexed \z
as %s.",
barename, mappings[present].basename)
conflicts.barenames = conflicts.barenames + 1
--- track conflicts per font
local conflictdata = entry.conflicts
if not conflictdata then
entry.conflicts = { barename = present }
else -- some conflicts already detected
conflictdata.barename = present
end
else
inbare [lowerbarename] = index
end
end
inbare [barename] = index
end
else
inbare = { [barename] = index }
bare [location] [format] = inbare
local lowerbarename = stringlower (barename)
if barename ~= lowerbarename then
inbare [lowerbarename] = index
end
end
-- /MK
--- 3) add to fullpath map
full [index] = fullpath
end --- mapping traversal
return files
end
local bold_spectrum_low = 501 --- 500 is medium, 900 heavy/black
local normal_weight = 400
local bold_weight = 700
local normal_width = 5
local pick_style
local pick_fallback_style
local check_regular
do
function pick_style (typographicsubfamily, subfamily)
return style_synonym [typographicsubfamily or subfamily or ""]
end
function pick_fallback_style (italicangle, pfmweight, width)
--[[--
More aggressive, but only to determine bold faces.
Note: Before you make this test more inclusive, ensure
no fonts are matched in the bold synonym spectrum over
a literally “bold[italic]” one. In the past, heuristics
been tried but ultimately caused unwanted modifiers
polluting the lookup table. What doesn’t work is, e. g.
treating weights > 500 as bold or allowing synonyms like
“heavy”, “black”.
--]]--
if width == normal_width then
if pfmweight == bold_weight then
--- bold spectrum matches
if italicangle == 0 then
return "b"
end
return "bi"
elseif pfmweight == normal_weight then
if italicangle ~= 0 then
return "i"
end
end
return tostring(pfmweight) .. (italicangle == 0 and "" or "i")
end
return false
end
--- we use only exact matches here since there are constructs
--- like “regularitalic” (Cabin, Bodoni Old Fashion)
function check_regular (typographicsubfamily,
subfamily,
italicangle,
weight,
width,
pfmweight)
local plausible_weight = false
--[[--
This filters out undesirable candidates that specify their
typographicsubfamily or subfamily as “regular” but are actually of
“semibold” or other weight—another drawback of the
oversimplifying classification into only three styles (r, i,
b, bi).
--]]--
if italicangle == 0 then
if pfmweight == 400 then
--[[--
Some fonts like Dejavu advertise an undistinguished
regular and a “condensed” version with the same
weight whilst also providing the style info in the
typographic subfamily instead of the subfamily (i. e.
the converse of what Adobe’s doing). The only way to
weed out the undesired pseudo-regular shape is to
peek at its advertised width (4 vs. 5).
--]]--
if width then
plausible_weight = width == normal_width
else
plausible_weight = true
end
elseif weight and regular_synonym [weight] then
plausible_weight = true
end
end
if plausible_weight then
if subfamily then
if regular_synonym [subfamily] then return "r" end
elseif typographicsubfamily then
if regular_synonym [typographicsubfamily] then return "r" end
end
end
return false
end
end
local function pull_values (entry)
local file = entry.file
local names = entry.names
local style = entry.style
local sanitized = names.sanitized
local english = sanitized.english
local info = sanitized.info
local metadata = sanitized.metadata
--- pull file info ...
entry.basename = file.base
entry.fullpath = file.full
entry.location = file.location
entry.subfont = file.subfont
--- pull name info ...
entry.psname = english.psname
entry.fontname = info.fontname or metadata.fontname
entry.fullname = english.fullname or info.fullname
entry.typographicsubfamily = english.typographicsubfamily
entry.familyname = metadata.familyname or english.typographicfamily or english.family
entry.plainname = names.fullname
entry.subfamily = english.subfamily
--- pull style info ...
entry.italicangle = style.italicangle
entry.size = style.size
entry.weight = style.weight
entry.width = style.width
entry.pfmweight = style.pfmweight
if config.luaotfload.db.strip == true then
entry.file = nil
entry.names = nil
entry.style = nil
end
end
local function add_family (name, subtable, modifier, entry)
if not name then --- probably borked font
return
end
local familytable = subtable [name]
if not familytable then
familytable = { }
subtable [name] = familytable
end
familytable [#familytable + 1] = {
index = entry.index,
modifier = modifier,
}
end
local function add_lastresort_regular (name, subtable, entry)
if not name then --- probably borked font
return
end
local familytable = subtable [name]
if not familytable then
familytable = { }
subtable [name] = familytable
end
familytable.fallback = entry.index
end
local function get_subtable (families, entry)
local location = entry.location
local format = entry.format
local subtable = families [location] [format]
if not subtable then
subtable = { }
families [location] [format] = subtable
end
return subtable
end
local function collect_families (mappings)
logreport ("info", 2, "db", "Analyzing families.")
local families = {
["local"] = { },
system = { },
texmf = { },
}
for i = 1, #mappings do
local entry = mappings [i]
if entry.file then
pull_values (entry)
end
local subtable = get_subtable (families, entry)
local familyname = entry.familyname
local typographicsubfamily = entry.typographicsubfamily
local subfamily = entry.subfamily
local weight = entry.weight
local width = entry.width
local pfmweight = entry.pfmweight
local italicangle = entry.italicangle
local modifier = pick_style (typographicsubfamily, subfamily)
if not modifier then --- regular, exact only
modifier = check_regular (typographicsubfamily,
subfamily,
italicangle,
weight,
width,
pfmweight)
end
if not modifier then
modifier = pick_fallback_style (italicangle, pfmweight, width)
end
if modifier then
add_family (familyname, subtable, modifier, entry)
end
if modifier ~= 'r' and regular_synonym[typographicsubfamily or subfamily or ''] then
add_lastresort_regular (familyname, subtable, entry)
end
end
collectgarbage "collect"
return families
end
local function collect_fontnames (mappings)
logreport ("info", 2, "db", "Collecting fontnames.")
local fontnames = {
["local"] = { },
system = { },
texmf = { },
}
for i = 1, #mappings do
local entry = mappings [i]
local subtable = get_subtable (fontnames, entry)
if entry.fontname then subtable[entry.fontname] = i end
if entry.fullname then subtable[entry.fullname] = i end
if entry.psname then subtable[entry.psname] = i end
end
collectgarbage "collect"
return fontnames
end
--[[doc--
group_modifiers -- For not-quite-bold faces, determine whether
they can fill in for a missing bold face slot in a matching family.
Some families like Lucida do not contain real bold / bold italic
members. Instead, they have semibold variants at weight 600 which
we must add in a separate pass.
--doc]]--
local style_categories = { "r", "b", "i", "bi" }
local bold_categories = { "b", "bi" }
local function group_modifiers (mappings, families)
logreport ("info", 2, "db", "Analyzing shapes, weights, and styles.")
for location, location_data in next, families do
for format, format_data in next, location_data do
for familyname, collected in next, format_data do
local styledata = { } --- will replace the “collected” table
local lastresort_regular = collected.fallback
collected.fallback = nil
--- First, fill in the ordinary style data that
--- fits neatly into the four relevant modifier
--- categories.
for _, modifier in next, style_categories do
local entries
for key, info in next, collected do
if info.modifier == modifier then
if not entries then
entries = { }
end
local index = info.index
local entry = mappings [index]
local size = entry.size
if size then
entries [#entries + 1] = {
size [1],
size [2],
size [3],
index,
}
else
entries.default = index
end
collected [key] = nil
end
styledata [modifier] = entries
end
end
if not styledata.r and lastresort_regular then
styledata.r = {default = lastresort_regular}
end
--- At this point the family set may still lack
--- entries for bold or bold italic. We will fill
--- those in using the modifier with the numeric
--- weight that is closest to bold (700).
if next (collected) then --- there are uncategorized entries
for _, modifier in next, bold_categories do
if not styledata [modifier] then
local closest
local minimum = 2^51
for key, info in next, collected do
local info_modifier = tonumber (info.modifier) and "b" or "bi"
if modifier == info_modifier then
local index = info.index
local entry = mappings [index]
local weight = entry.pfmweight
local diff = weight < 700 and 700 - weight or weight - 700
if weight > 500 and diff < minimum then
minimum = diff
closest = weight
end
end
end
if closest then
--- We know there is a substitute face for the modifier.
--- Now we scan the list again to extract the size data
--- in case the shape is available at multiple sizes.
local entries = { }
for key, info in next, collected do
local info_modifier = tonumber (info.modifier) and "b" or "bi"
if modifier == info_modifier then
local index = info.index
local entry = mappings [index]
local size = entry.size
if entry.pfmweight == closest then
if size then
entries [#entries + 1] = {
size [1],
size [2],
size [3],
index,
}
else
entries.default = index
end
end
end
end
styledata [modifier] = entries
end
end
end
end
format_data [familyname] = styledata
end
end
end
return families
end
local function cmp_sizes (a, b)
return a [1] < b [1]
end
local function order_design_sizes (families)
logreport ("info", 2, "db", "Ordering design sizes.")
for location, data in next, families do
for format, data in next, data do
for familyname, data in next, data do
for style, data in next, data do
tablesort (data, cmp_sizes)
end
end
end
end
return families
end
--[[doc--
Get the subfont index corresponding to a given psname in a
font collection
--doc]]--
local function lookup_subfont_index(filepath, psname)
assert(name_index)
-- if not name_index then name_index = load_names () end
local filestatus = name_index.status[filepath]
local mappings = name_index.mappings
if filestatus then
for subfont, idx in next, filestatus.index do
if mappings[idx].psname == psname then
return subfont or 1
end
end
end
-- If that didn't work, we do a manual search
psname = sanitize_fontname(psname)
local err, info = read_font_file (filepath)
if #info == 0 then return 1 end
for i = 1, #info do
for _, names in next, info[i].platformnames do
if psname == sanitize_fontname(names.postscriptname) then
return i
end
end
end
end
--[[doc--
collect_font_filenames -- Scan the three search path categories for
font files. This constitutes the first pass of the update mode.
--doc]]--
--- unit -> string * string list
local function collect_font_filenames ()
logreport ("info", 4, "db", "Scanning the filesystem for font files.")
local filenames = { }
local bisect = config.luaotfload.misc.bisect
local max_fonts = config.luaotfload.db.max_fonts --- XXX revisit for lua 5.3 wrt integers
tableappend (filenames, collect_font_filenames_texmf ())
tableappend (filenames, collect_font_filenames_system ())
local scan_local = config.luaotfload.db.scan_local == true
if scan_local then
local localfonts, found = collect_font_filenames_local()
if found then
tableappend (filenames, localfonts)
else
scan_local = false
end
end
--- Now drop everything above max_fonts.
if max_fonts < #filenames then
filenames = { unpack (filenames, 1, max_fonts) }
end
--- And choose the requested slice if in bisect mode.
if bisect then
return { unpack (filenames, bisect[1], bisect[2]) }
end
return filenames, scan_local
end
--[[doc--
nth_font_file -- Return the filename of the nth font.
--doc]]--
--- int -> string
local function nth_font_filename (n)
logreport ("info", 4, "db", "Picking font file no. %d.", n)
if not p_blacklist then
read_blacklist ()
end
local filenames = collect_font_filenames ()
return filenames[n] and filenames[n][1] or "<error>"
end
--[[doc--
font_slice -- Return the fonts in the range from lo to hi.
--doc]]--
local function font_slice (lo, hi)
logreport ("info", 4, "db", "Retrieving font files nos. %d--%d.", lo, hi)
if not p_blacklist then
read_blacklist ()
end
local filenames = collect_font_filenames ()
local result = { }
for i = lo, hi do
result[#result + 1] = filenames[i][1]
end
return result
end
--[[doc
count_font_files -- Return the number of files found by
collect_font_filenames. This function is exported primarily
for use with luaotfload-tool.lua in bisect mode.
--doc]]--
--- unit -> int
local function count_font_files ()
logreport ("info", 4, "db", "Counting font files.")
if not p_blacklist then
read_blacklist ()
end
return #collect_font_filenames ()
end
--- dbobj -> stats
local function collect_statistics (mappings)
local sum_dsnsize, n_dsnsize = 0, 0
local fullname, family, families = { }, { }, { }
local subfamily, typographicsubfamily = { }, { }
local function addtohash (hash, item)
if item then
local times = hash [item]
if times then
hash [item] = times + 1
else
hash [item] = 1
end
end
end
local function appendtohash (hash, key, value)
if key and value then
local entry = hash [key]
if entry then
entry [#entry + 1] = value
else
hash [key] = { value }
end
end
end
local function addtoset (hash, key, value)
if key and value then
local set = hash [key]
if set then
set [value] = true
else
hash [key] = { [value] = true }
end
end
end
local function setsize (set)
local n = 0
for _, _ in next, set do
n = n + 1
end
return n
end
local function hashsum (hash)
local n = 0
for _, m in next, hash do
n = n + m
end
return n
end
for _, entry in next, mappings do
local style = entry.style
local names = entry.names.sanitized
local englishnames = names.english
addtohash (fullname, englishnames.fullname)
addtohash (family, englishnames.family)
addtohash (subfamily, englishnames.subfamily)
addtohash (typographicsubfamily, englishnames.typographicsubfamily)
addtoset (families, englishnames.family, englishnames.fullname)
local sizeinfo = entry.style.size
if sizeinfo then
sum_dsnsize = sum_dsnsize + sizeinfo [1]
n_dsnsize = n_dsnsize + 1
end
end
--inspect (families)
local n_fullname = setsize (fullname)
local n_family = setsize (family)
if log.get_loglevel () > 1 then
local function pprint_top (hash, n, set)
local freqs = { }
local items = { }
for item, value in next, hash do
if set then
freq = setsize (value)
else
freq = value
end
local ifreq = items [freq]
if ifreq then
ifreq [#ifreq + 1] = item
else
items [freq] = { item }
freqs [#freqs + 1] = freq
end
end
tablesort (freqs)
local from = #freqs
local to = from - (n - 1)
if to < 1 then
to = 1
end
for i = from, to, -1 do
local freq = freqs [i]
local itemlist = items [freq]
if type (itemlist) == "table" then
itemlist = tableconcat (itemlist, ", ")
end
logreport ("both", 0, "db",
" · %4d × %s.",
freq, itemlist)
end
end
logreport ("both", 0, "", "~~~~ font index statistics ~~~~")
logreport ("both", 0, "db",
" · Collected %d fonts (%d names) in %d families.",
#mappings, n_fullname, n_family)
pprint_top (families, 4, true)
logreport ("both", 0, "db",
" · %d different \"subfamily\" kinds.",
setsize (subfamily))
pprint_top (subfamily, 4)
logreport ("both", 0, "db",
" · %d different \"typographicsubfamily\" kinds.",
setsize (typographicsubfamily))
pprint_top (typographicsubfamily, 4)
end
local mean_dsnsize = 0
if n_dsnsize > 0 then
mean_dsnsize = sum_dsnsize / n_dsnsize
end
return {
mean_dsnsize = mean_dsnsize,
names = {
fullname = n_fullname,
families = n_family,
},
-- style = {
-- subfamily = subfamily,
-- typographicsubfamily = typographicsubfamily,
-- },
}
end
--- force: dictate rebuild from scratch
--- dry_dun: don’t write to the db, just scan dirs
--- dbobj? -> bool? -> bool? -> dbobj
function update_names (currentnames, force, dry_run)
local targetnames
local n_new = 0
local n_rem = 0
local conf = config.luaotfload
if conf.run.live ~= false and conf.db.update_live == false then
logreport ("info", 2, "db", "Skipping database update.")
--- skip all db updates
return currentnames or name_index
end
local starttime = osgettimeofday ()
--[[
The main function, scans everything
- “targetnames” is the final table to return
- force is whether we rebuild it from scratch or not
]]
logreport ("both", 1, "db",
"Updating the font names database"
.. (force and " forcefully." or "."))
if config.luaotfload.db.skip_read == true then
--- the difference to a “dry run” is that we don’t search
--- for font files entirely. we also ignore the “force”
--- parameter since it concerns only the font files.
logreport ("info", 2, "db",
"Ignoring font files, reusing old data.")
currentnames = load_names (false)
targetnames = currentnames
else
if force then
currentnames = initialize_namedata (get_font_filter ())
else
if not currentnames or not next (currentnames) then
currentnames = load_names (dry_run)
end
if currentnames.meta.version ~= names.version then
logreport ("both", 1, "db",
"No font names database or old \z
one found; generating new one.")
currentnames = initialize_namedata (get_font_filter ())
end
end
targetnames = initialize_namedata (get_font_filter (),
currentnames.meta and currentnames.meta.created)
read_blacklist ()
--- pass 1: Collect the names of all fonts we are going to process.
local font_filenames, local_fonts = collect_font_filenames ()
if local_fonts then
targetnames.meta['local'] = true
end
--- pass 2: read font files (normal case) or reuse information
--- present in index
n_rem = count_removed (currentnames.files)
n_new = retrieve_namedata (font_filenames,
currentnames,
targetnames,
dry_run)
logreport ("info", 3, "db",
"Found %d font files; %d new, %d stale entries.",
#font_filenames, n_new, n_rem)
end
--- pass 3 (optional): collect some stats about the raw font info
if config.luaotfload.misc.statistics == true then
targetnames.meta.statistics = collect_statistics
(targetnames.mappings)
end
--- we always generate the file lookup tables because
--- non-texmf entries are redirected there and the mapping
--- needs to be 100% consistent
--- pass 4: build filename table
targetnames.files = generate_filedata (targetnames.mappings)
--- pass 5: build family lookup table
targetnames.families = collect_families (targetnames.mappings)
--- pass 6: arrange style and size info
targetnames.families = group_modifiers (targetnames.mappings,
targetnames.families)
--- pass 7: order design size tables
targetnames.families = order_design_sizes (targetnames.families)
--- pass 8: build family lookup table
targetnames.fontnames = collect_fontnames (targetnames.mappings)
logreport ("info", 3, "db",
"Rebuilt in %0.f ms.",
1000 * (osgettimeofday () - starttime))
name_index = targetnames
if dry_run ~= true then
if n_new + n_rem == 0 then
logreport ("info", 2, "db",
"No new or removed fonts, skip saving to disk.")
else
local success, reason = save_names ()
if not success then
logreport ("both", 0, "db",
"Failed to save database to disk: %s",
reason)
end
end
if flush_lookup_cache () and save_lookups () then
logreport ("both", 2, "cache", "Lookup cache emptied.")
return targetnames
end
end
return targetnames
end
--- unit -> bool
function save_lookups ( )
local paths = config.luaotfload.paths
local luaname, lucname = paths.lookup_path_lua, paths.lookup_path_luc
if fileiswritable (luaname) and fileiswritable (lucname) then
tabletofile (luaname, lookup_cache, true)
osremove (lucname)
caches.compile (lookup_cache, luaname, lucname)
--- double check ...
if lfsisfile (luaname) and lfsisfile (lucname) then
logreport ("both", 3, "cache", "Lookup cache saved.")
return true
end
logreport ("info", 0, "cache", "Could not compile lookup cache.")
return false
end
logreport ("info", 0, "cache", "Lookup cache file not writable.")
if not fileiswritable (luaname) then
logreport ("info", 0, "cache", "Failed to write %s.", luaname)
end
if not fileiswritable (lucname) then
logreport ("info", 0, "cache", "Failed to write %s.", lucname)
end
return false
end
--- save_names() is usually called without the argument
--- dbobj? -> bool * string option
function save_names (currentnames)
if not currentnames then
currentnames = name_index
end
if not currentnames or type (currentnames) ~= "table" then
return false, "invalid names table"
elseif currentnames.meta and currentnames.meta["local"] then
return false, "table contains local entries"
end
local paths = config.luaotfload.paths
local luaname, lucname = paths.index_path_lua, paths.index_path_luc
if fileiswritable (luaname) and fileiswritable (lucname) then
osremove (lucname)
local gzname = luaname .. ".gz"
if config.luaotfload.db.compress then
local serialized = tableserialize (currentnames, true)
gzipsave (gzname, serialized)
caches.compile (currentnames, "", lucname)
else
tabletofile (luaname, currentnames, true)
caches.compile (currentnames, luaname, lucname)
end
logreport ("info", 2, "db", "Font index saved at ...")
local success = false
if lfsisfile (luaname) then
logreport ("info", 2, "db", "Text: " .. luaname)
success = true
end
if lfsisfile (gzname) then
logreport ("info", 2, "db", "Gzip: " .. gzname)
success = true
end
if lfsisfile (lucname) then
logreport ("info", 2, "db", "Byte: " .. lucname)
success = true
end
if success then
return true
else
logreport ("info", 0, "db", "Could not compile font index.")
return false
end
end
logreport ("info", 0, "db", "Index file not writable")
if not fileiswritable (luaname) then
logreport ("info", 0, "db", "Failed to write %s.", luaname)
end
if not fileiswritable (lucname) then
logreport ("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 function print_cache (category, path, luanames, lucnames, rest)
local function report_indeed (...)
logreport ("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 function purge_from_cache (category, path, list, all)
logreport ("info", 1, "cache", "Luaotfload cache: %s %s",
(all and "erase" or "purge"), category)
logreport ("info", 1, "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
logreport ("info", 5, "cache", "Removing %s.", filename)
osremove(filename)
n = n + 1
else
local suffix = filesuffix(filename)
if suffix == "lua" then
local checkname = file.replacesuffix(
filename, "lua", "luc")
if lfsisfile(checkname) then
logreport ("info", 5, "cache", "Removing %s.", filename)
osremove(filename)
n = n + 1
end
end
end
end
end
logreport ("info", 1, "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 function collect_cache (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 = filesuffix(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 function getwritablecachepath ( )
--- fonts.handlers.otf doesn’t exist outside a Luatex run,
--- so we have to improvise
local writable = getwritablepath (config.luaotfload.paths.cache_dir, "")
if writable then
return writable
end
end
local function getreadablecachepaths ( )
local readables = caches.getreadablepaths
(config.luaotfload.paths.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 function purge_cache ( )
local writable_path = getwritablecachepath ()
local luanames, lucnames, rest = collect_cache(writable_path)
if log.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 function erase_cache ( )
local writable_path = getwritablecachepath ()
local luanames, lucnames, rest, all = collect_cache(writable_path)
if log.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 function separator ( )
logreport ("info", 0, string.rep("-", 67))
end
--- unit -> unit
local function show_cache ( )
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)
texio.write_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
-----------------------------------------------------------------------
--- API assumptions of the fontloader
-----------------------------------------------------------------------
--- PHG: we need to investigate these, maybe they’re useful as early
--- hooks
local function reportmissingbase ()
logreport ("info", 0, "db", --> bug‽
"Font name database not found but expected by fontloader.")
fonts.names.reportmissingbase = nil
end
local function reportmissingname ()
logreport ("info", 0, "db", --> bug‽
"Fontloader attempted to lookup name before Luaotfload \z
was initialized.")
fonts.names.reportmissingname = nil
end
local function getfilename (a1, a2)
logreport ("info", 6, "db", --> bug‽
"Fontloader looked up font file (%s, %s) before Luaotfload \z
was initialized.", tostring(a1), tostring(a2))
return lookup_fullpath (a1, a2)
end
local function resolve (name, subfont)
logreport ("info", 6, "db", --> bug‽
"Fontloader attempted to resolve name (%s, %s) before \z
Luaotfload was initialized.", tostring(name), tostring(subfont))
return lookup_font_name { name = name, sub = subfont }
end
local api = {
ignoredfile = function() return false end,
reportmissingbase = reportmissingbase,
reportmissingname = reportmissingname,
getfilename = getfilename,
resolve = resolve,
}
-----------------------------------------------------------------------
--- export functionality to the namespace “fonts.names”
-----------------------------------------------------------------------
local export = {
set_font_filter = set_font_filter,
set_size_dimension = set_size_dimension,
flush_lookup_cache = flush_lookup_cache,
save_lookups = save_lookups,
load = load_names,
access_font_index = access_font_index,
data = function () return name_index end,
save = save_names,
update = update_names,
lookup_font_file = lookup_font_file,
lookup_font_name = lookup_font_name,
lookup_font_name_cached = lookup_font_name_cached,
getfilename = lookup_fullpath,
lookup_fullpath = lookup_fullpath,
read_blacklist = read_blacklist,
sanitize_fontname = sanitize_fontname,
getmetadata = getmetadata,
set_location_precedence = set_location_precedence,
count_font_files = count_font_files,
nth_font_filename = nth_font_filename,
font_slice = font_slice,
lookup_subfont_index = lookup_subfont_index,
--- font cache
purge_cache = purge_cache,
erase_cache = erase_cache,
show_cache = show_cache,
find_closest = find_closest,
}
return function ()
--- the font loader namespace is “fonts”, same as in Context
--- we need to put some fallbacks into place for when running
--- as a script
if not fonts then return false end
logreport = luaotfload.log.report
local fonts = fonts
fonts.names = fonts.names or names
fonts.formats = fonts.formats or { }
fonts.definers = fonts.definers or { resolvers = { } }
names.blacklist = blacklist
-- MK Changed to rebuild with case insensitive fallback.
-- Negative version to indicate generation by modified code.
names.version = -2 --- decrease monotonically
-- /MK
names.data = nil --- contains the loaded database
names.lookups = nil --- contains the lookup cache
for sym, ref in next, export do names[sym] = ref end
for sym, ref in next, api do names[sym] = names[sym] or ref end
return true
end
-- vim:tw=71:sw=4:ts=4:expandtab