[main] move luaotfload.lua -> luaotfload-main.lua

1 files changed, 0 insertions, 700 deletions

diff --git a/luaotfload.lua b/luaotfload.lua
deleted file mode 100644
index a10fc34..0000000
--- a/luaotfload.lua
+++ /dev/null
@@ -1,700 +0,0 @@
------------------------------------------------------------------------
---         FILE:  luaotfload.lua
---  DESCRIPTION:  Luatex fontloader initialization
--- REQUIREMENTS:  luatex v.0.78 or later, the lualibs package
---       AUTHOR:  Élie Roux, Khaled Hosny, Philipp Gesang
---      VERSION:  same as Luaotfload
---     MODIFIED:  2014-01-16 06:51:20+0100
------------------------------------------------------------------------
---
---- Note:
---- This file was part of the original luaotfload.dtx and has been
---- converted to a pure Lua file during the transition from Luaotfload
---- version 2.4 to 2.5. Thus, the comments are still in TeX (Latex)
---- markup.
-
-if not modules then modules = { } end modules ["luaotfload"] = {
-    version   = "2.5",
-    comment   = "fontloader initialization",
-    author    = "Hans Hagen, Khaled Hosny, Elie Roux, Philipp Gesang",
-    copyright = "PRAGMA ADE / ConTeXt Development Team",
-    license   = "GNU General Public License v. 2.0"
-}
-
-
---[[doc--
-
-    This file initializes the system and loads the font loader. To
-    minimize potential conflicts between other packages and the code
-    imported from \CONTEXT, several precautions are in order. Some of
-    the functionality that the font loader expects to be present, like
-    raw access to callbacks, are assumed to have been disabled by
-    \identifier{luatexbase} when this file is processed. In some cases
-    it is possible to trick it by putting dummies into place and
-    restoring the behavior from \identifier{luatexbase} after
-    initilization. Other cases such as attribute allocation require
-    that we hook the functionality from \identifier{luatexbase} into
-    locations where they normally wouldn’t be.
-
-    Anyways we can import the code base without modifications, which is
-    due mostly to the extra effort by Hans Hagen to make \LUATEX-Fonts
-    self-contained and encapsulate it, and especially due to his
-    willingness to incorporate our suggestions.
-
---doc]]--
-
-luaotfload                        = luaotfload or { }
-local luaotfload                  = luaotfload
-
-config                            = config or { }
-config.luaotfload                 = config.luaotfload or { }
-------.luaotfload.resolver        = config.luaotfload.resolver         or "normal"
-config.luaotfload.resolver        = config.luaotfload.resolver         or "cached"
-config.luaotfload.definer         = config.luaotfload.definer          or "patch"
-config.luaotfload.loglevel        = config.luaotfload.loglevel         or 2
-config.luaotfload.color_callback  = config.luaotfload.color_callback   or "pre_linebreak_filter"
-config.luaotfload.prioritize      = config.luaotfload.prioritize       or "sys"
-config.luaotfload.names_dir       = config.luaotfload.names_dir        or "names"
-config.luaotfload.cache_dir       = config.luaotfload.cache_dir        or "fonts"
-config.luaotfload.index_file      = config.luaotfload.index_file       or "luaotfload-names.lua"
-config.luaotfload.formats         = config.luaotfload.formats          or "otf,ttf,ttc,dfont"
-
-if not config.luaotfload.strip then
-    config.luaotfload.strip = true
-end
-
-luaotfload.module = {
-    name          = "luaotfload",
-    version       = 2.50000,
-    date          = "2014/**/**",
-    description   = "OpenType layout system.",
-    author        = "Elie Roux & Hans Hagen",
-    copyright     = "Elie Roux",
-    license       = "GPL v2.0"
-}
-
-local luatexbase       = luatexbase
-
-local setmetatable     = setmetatable
-local type, next       = type, next
-
-local kpsefind_file    = kpse.find_file
-local lfsisfile        = lfs.isfile
-
-local add_to_callback, create_callback =
-      luatexbase.add_to_callback, luatexbase.create_callback
-local reset_callback, call_callback =
-      luatexbase.reset_callback, luatexbase.call_callback
-
-local dummy_function = function () end
-
-local error, warning, info, log =
-    luatexbase.provides_module(luaotfload.module)
-
-luaotfload.error        = error
-luaotfload.warning      = warning
-luaotfload.info         = info
-luaotfload.log          = log
-
---[[doc--
-
-     We set the minimum version requirement for \LUATEX to v0.76,
-     because the font loader requires recent features like direct
-     attribute indexing and \luafunction{node.end_of_math()} that aren’t
-     available in earlier versions.\footnote{%
-      See Taco’s announcement of v0.76:
-      \url{http://comments.gmane.org/gmane.comp.tex.luatex.user/4042}
-      and this commit by Hans that introduced those features.
-      \url{http://repo.or.cz/w/context.git/commitdiff/a51f6cf6ee087046a2ae5927ed4edff0a1acec1b}.
-    }
-
---doc]]--
-
-local luatex_version = 76
-
-if tex.luatexversion < luatex_version then
-    warning("LuaTeX v%.2f is old, v%.2f is recommended.",
-             tex.luatexversion/100,
-             luatex_version   /100)
-    --- we install a fallback for older versions as a safety
-    if not node.end_of_math then
-        local math_t          = node.id"math"
-        local traverse_nodes  = node.traverse_id
-        node.end_of_math = function (n)
-            for n in traverse_nodes(math_t, n.next) do
-                return n
-            end
-        end
-    end
-end
-
---[[doc--
-
-    \subsection{Module loading}
-    We load the files imported from \CONTEXT with this function. It
-    automatically prepends the prefix \fileent{luaotfload-} to its
-    argument, so we can refer to the files with their actual \CONTEXT
-    name.
-
---doc]]--
-
-local fl_prefix = "luaotfload" -- “luatex” for luatex-plain
-local loadmodule = function (name)
-    require(fl_prefix .."-"..name)
-end
-
---[[doc--
-
-  Before \TeX Live 2013 version, \LUATEX had a bug that made ofm fonts
-  fail when called with their extension. There was a side-effect making
-  ofm totally unloadable when luaotfload was present. The following
-  lines are a patch for this bug. The utility of these lines is
-  questionable as they are not necessary since \TeX Live 2013. They
-  should be removed in the next version.
-
---doc]]--
-
-
-local p_dot, p_slash = P".",  P"/"
-local p_suffix       = (p_dot * (1 - p_dot - p_slash)^1 * P(-1)) / ""
-local p_removesuffix = Cs((p_suffix + 1)^1)
-
-local find_vf_file = function (name)
-    local fullname = kpsefind_file(name, "ovf")
-    if not fullname then
-        --fullname = kpsefind_file(file.removesuffix(name), "ovf")
-        fullname = kpsefind_file(lpegmatch(p_removesuffix, name), "ovf")
-    end
-    if fullname then
-        log("loading virtual font file %s.", fullname)
-    end
-    return fullname
-end
-
---[[doc--
-
-    \subsection{Preparing the Font Loader}
-    We treat the fontloader as a black box so behavior is consistent
-    between formats.
-    We load the fontloader code directly in the same fashion as the
-    Plain format \identifier{luatex-fonts} that is part of Context.
-    How this is executed depends on the presence on the
-    \emphasis{merged font loader code}.
-    In \identifier{luaotfload} this is contained in the file
-    \fileent{luaotfload-merged.lua}.
-    If this file cannot be found, the original libraries from \CONTEXT
-    of which the merged code was composed are loaded instead.
-    Since these files are not shipped with Luaotfload, an installation
-    of Context is required.
-    (Since we pull the fontloader directly from the Context minimals,
-    the necessary Context version is likely to be more recent than that
-    of other TeX distributions like Texlive.)
-    The imported font loader will call \luafunction{callback.register}
-    once while reading \fileent{font-def.lua}.
-    This is unavoidable unless we modify the imported files, but
-    harmless if we make it call a dummy instead.
-    However, this problem might vanish if we decide to do the merging
-    ourselves, like the \identifier{lualibs} package does.
-    With this step we would obtain the freedom to load our own
-    overrides in the process right where they are needed, at the cost
-    of losing encapsulation.
-    The decision on how to progress is currently on indefinite hold.
-
---doc]]--
-
-local starttime = os.gettimeofday()
-
-local trapped_register  = callback.register
-callback.register       = dummy_function
-
---[[doc--
-
-    By default, the fontloader requires a number of \emphasis{private
-    attributes} for internal use.
-    These must be kept consistent with the attribute handling methods
-    as provided by \identifier{luatexbase}.
-    Our strategy is to override the function that allocates new
-    attributes before we initialize the font loader, making it a
-    wrapper around \luafunction{luatexbase.new_attribute}.\footnote{%
-        Many thanks, again, to Hans Hagen for making this part
-        configurable!
-    }
-    The attribute identifiers are prefixed “\fileent{luaotfload@}” to
-    avoid name clashes.
-
---doc]]--
-
-do
-    local new_attribute    = luatexbase.new_attribute
-    local the_attributes   = luatexbase.attributes
-
-    attributes = attributes or { }
-
-    attributes.private = function (name)
-        local attr   = "luaotfload@" .. name --- used to be: “otfl@”
-        local number = the_attributes[attr]
-        if not number then
-            number = new_attribute(attr)
-        end
-        return number
-    end
-end
-
---[[doc--
-
-    These next lines replicate the behavior of
-    \fileent{luatex-fonts.lua}.
-
---doc]]--
-
-local context_environment = { }
-
-local push_namespaces = function ()
-    log("push namespace for font loader")
-    local normalglobal = { }
-    for k, v in next, _G do
-        normalglobal[k] = v
-    end
-    return normalglobal
-end
-
-local pop_namespaces = function (normalglobal, isolate)
-    if normalglobal then
-        local _G = _G
-        local mode = "non-destructive"
-        if isolate then mode = "destructive" end
-        log("pop namespace from font loader -- " .. mode)
-        for k, v in next, _G do
-            if not normalglobal[k] then
-                context_environment[k] = v
-                if isolate then
-                    _G[k] = nil
-                end
-            end
-        end
-        for k, v in next, normalglobal do
-            _G[k] = v
-        end
-        -- just to be sure:
-        setmetatable(context_environment,_G)
-    else
-        log("irrecoverable error during pop_namespace: no globals to restore")
-        os.exit()
-    end
-end
-
-luaotfload.context_environment  = context_environment
-luaotfload.push_namespaces      = push_namespaces
-luaotfload.pop_namespaces       = pop_namespaces
-
-local our_environment = push_namespaces()
-
---[[doc--
-
-    The font loader requires that the attribute with index zero be
-    zero. We happily oblige.
-    (Cf. \fileent{luatex-fonts-nod.lua}.)
-
---doc]]--
-
-tex.attribute[0] = 0
-
---[[doc--
-
-    Now that things are sorted out we can finally load the fontloader.
-
---doc]]--
-
-loadmodule "fontloader.lua"
----loadmodule"font-odv.lua" --- <= Devanagari support from Context
-
-if fonts then
-
-    if not fonts._merge_loaded_message_done_ then
-        log [["I am using the merged version of 'luaotfload.lua' here.]]
-        log [[ If you run into problems or experience unexpected]]
-        log [[ behaviour, and if you have ConTeXt installed you can try]]
-        log [[ to delete the file 'luaotfload-merged.lua' as I might]]
-        log [[ then use the possibly updated libraries. The merged]]
-        log [[ version is not supported as it is a frozen instance.]]
-        log [[ Problems can be reported to the ConTeXt mailing list."]]
-    end
-    fonts._merge_loaded_message_done_ = true
-
-else--- the loading sequence is known to change, so this might have to
-    --- be updated with future updates!
-    --- do not modify it though unless there is a change to the merged
-    --- package!
-    loadmodule("l-lua.lua")
-    loadmodule("l-lpeg.lua")
-    loadmodule("l-function.lua")
-    loadmodule("l-string.lua")
-    loadmodule("l-table.lua")
-    loadmodule("l-io.lua")
-    loadmodule("l-file.lua")
-    loadmodule("l-boolean.lua")
-    loadmodule("l-math.lua")
-    loadmodule("util-str.lua")
-    loadmodule('luatex-basics-gen.lua')
-    loadmodule('data-con.lua')
-    loadmodule('luatex-basics-nod.lua')
-    loadmodule('font-ini.lua')
-    loadmodule('font-con.lua')
-    loadmodule('luatex-fonts-enc.lua')
-    loadmodule('font-cid.lua')
-    loadmodule('font-map.lua')
-    loadmodule('luatex-fonts-syn.lua')
-    loadmodule('luatex-fonts-tfm.lua')
-    loadmodule('font-oti.lua')
-    loadmodule('font-otf.lua')
-    loadmodule('font-otb.lua')
-    loadmodule('luatex-fonts-inj.lua')  --> since 2014-01-07, replaces node-inj.lua
-    loadmodule('font-ota.lua')
-    loadmodule('luatex-fonts-otn.lua')  --> since 2014-01-07, replaces font-otn.lua
-    loadmodule('font-otp.lua')          --> since 2013-04-23
-    loadmodule('luatex-fonts-lua.lua')
-    loadmodule('font-def.lua')
-    loadmodule('luatex-fonts-def.lua')
-    loadmodule('luatex-fonts-ext.lua')
-    loadmodule('luatex-fonts-cbk.lua')
-end --- non-merge fallback scope
-
---[[doc--
-
-    Here we adjust the globals created during font loader
-    initialization. If the second argument to
-    \luafunction{pop_namespaces()} is \verb|true| this will restore the
-    state of \luafunction{_G}, eliminating every global generated since
-    the last call to \luafunction{push_namespaces()}. At the moment we
-    see no reason to do this, and since the font loader is considered
-    an essential part of \identifier{luatex} as well as a very well
-    organized piece of code, we happily concede it the right to add to
-    \luafunction{_G} if needed.
-
---doc]]--
-
-pop_namespaces(our_environment, false)-- true)
-
-log("fontloader loaded in %0.3f seconds", os.gettimeofday()-starttime)
-
---[[doc--
-
-    \subsection{Callbacks}
-    After the fontloader is ready we can restore the callback trap from
-    \identifier{luatexbase}.
-
---doc]]--
-
-callback.register = trapped_register
-
---[[doc--
-
-    We do our own callback handling with the means provided by
-    luatexbase.
-    Note: \luafunction{pre_linebreak_filter} and
-    \luafunction{hpack_filter} are coupled in \CONTEXT in the concept
-    of \emphasis{node processor}.
-
---doc]]--
-
-add_to_callback("pre_linebreak_filter",
-                nodes.simple_font_handler,
-                "luaotfload.node_processor",
-                1)
-add_to_callback("hpack_filter",
-                nodes.simple_font_handler,
-                "luaotfload.node_processor",
-                1)
-add_to_callback("find_vf_file",
-                find_vf_file, "luaotfload.find_vf_file")
-
-loadmodule "override.lua"   --- “luat-ovr”
-
-logs.set_loglevel(config.luaotfload.loglevel)
-
---[[doc--
-
-    Now we load the modules written for \identifier{luaotfload}.
-
---doc]]--
-loadmodule "parsers.lua"    --- new in 2.5; fonts.conf and syntax
-loadmodule "loaders.lua"    --- “font-pfb” new in 2.0, added 2011
-loadmodule "database.lua"   --- “font-nms”
-loadmodule "colors.lua"     --- “font-clr”
-
---[[doc--
-
-    Relying on the \verb|name:| resolver for everything has been the
-    source of permanent trouble with the database.
-    With the introduction of the new syntax parser we now have enough
-    granularity to distinguish between the \XETEX emulation layer and
-    the genuine \verb|name:| and \verb|file:| lookups of \LUATEX-Fonts.
-    Another benefit is that we can now easily plug in or replace new
-    lookup behaviors if necessary.
-    The name resolver remains untouched, but it calls
-    \luafunction{fonts.names.resolve()} internally anyways (see
-    \fileent{luaotfload-database.lua}).
-
---doc]]--
-
-local filesuffix          = file.suffix
-local fileremovesuffix    = file.removesuffix
-local request_resolvers   = fonts.definers.resolvers
-local formats             = fonts.formats
-local names               = fonts.names
-formats.ofm               = "type1"
-
-fonts.encodings.known     = fonts.encodings.known or { }
-
---[[doc--
-
-    \identifier{luaotfload} promises easy access to system fonts.
-    Without additional precautions, this cannot be achieved by
-    \identifier{kpathsea} alone, because it searches only the
-    \fileent{texmf} directories by default.
-    Although it is possible for \identifier{kpathsea} to include extra
-    paths by adding them to the \verb|OSFONTDIR| environment variable,
-    this is still short of the goal »\emphasis{it just works!}«.
-    When building the font database \identifier{luaotfload} scans
-    system font directories anyways, so we already have all the
-    information for looking sytem fonts.
-    With the release version 2.2 the file names are indexed in the
-    database as well and we are ready to resolve \verb|file:| lookups
-    this way.
-    Thus we no longer need to call the \identifier{kpathsea} library in
-    most cases when looking up font files, only when generating the
-    database, and when verifying the existence of a file in the
-    \fileent{texmf} tree.
-
---doc]]--
-
-local resolve_file        = names.crude_file_lookup
---local resolve_file        = names.crude_file_lookup_verbose
-local resolve_name        = names.resolve_name
-
-local file_resolver = function (specification)
-    local name    = resolve_file (specification.name)
-    local suffix  = filesuffix(name)
-    if formats[suffix] then
-        specification.forced      = suffix
-        specification.forcedname  = file.removesuffix(name)
-    else
-        specification.name = name
-    end
-end
-
-request_resolvers.file = file_resolver
-
---[[doc--
-
-    We classify as \verb|anon:| those requests that have neither a
-    prefix nor brackets. According to Khaled\footnote{%
-        \url{https://github.com/phi-gamma/luaotfload/issues/4#issuecomment-17090553}.
-    }
-    they are the \XETEX equivalent of a \verb|name:| request, so we
-    will be treating them as such.
-
---doc]]--
-
---request_resolvers.anon = request_resolvers.name
-
---[[doc--
-
-    There is one drawback, though.
-    This syntax is also used for requesting fonts in \identifier{Type1}
-    (\abbrev{tfm}, \abbrev{ofm}) format.
-    These are essentially \verb|file:| lookups and must be caught
-    before the \verb|name:| resolver kicks in, lest they cause the
-    database to update.
-    Even if we were to require the \verb|file:| prefix for all
-    \identifier{Type1} requests, tests have shown that certain fonts
-    still include further fonts (e.~g. \fileent{omlgcb.ofm} will ask
-    for \fileent{omsecob.tfm}) \emphasis{using the old syntax}.
-    For this reason, we introduce an extra check with an early return.
-
---doc]]--
-
-local type1_formats = { "tfm", "ofm", }
-
-request_resolvers.anon = function (specification)
-    local name = specification.name
-    for i=1, #type1_formats do
-        local format = type1_formats[i]
-        if resolvers.findfile(name, format) then
-            specification.forcedname = file.addsuffix(name, format)
-            specification.forced     = format
-            return
-        end
-    end
-    --- under some weird circumstances absolute paths get
-    --- passed to the definer; we have to catch them
-    --- before the name: resolver misinterprets them.
-    name = specification.specification
-    local exists, _ = lfsisfile(name)
-    if exists then --- garbage; we do this because we are nice,
-                   --- not because it is correct
-        logs.names_report("log", 1, "load", "file %q exists", name)
-        logs.names_report("log", 1, "load",
-          "... overriding borked anon: lookup with path: lookup")
-        specification.name = name
-        request_resolvers.path(specification)
-        return
-    end
-    request_resolvers.name(specification)
-end
-
---[[doc--
-
-    Prior to version 2.2, \identifier{luaotfload} did not distinguish
-    \verb|file:| and \verb|path:| lookups, causing complications with
-    the resolver.
-    Now we test if the requested name is an absolute path in the file
-    system, otherwise we fall back to the \verb|file:| lookup.
-
---doc]]--
-
-request_resolvers.path = function (specification)
-    local name       = specification.name
-    local exists, _  = lfsisfile(name)
-    if not exists then -- resort to file: lookup
-        logs.names_report("log", 1, "load",
-          "path lookup of %q unsuccessful, falling back to file:",
-          name)
-        file_resolver (specification)
-    else
-        local suffix = filesuffix (name)
-        if formats[suffix] then
-            specification.forced      = suffix
-            specification.name        = file.removesuffix(name)
-            specification.forcedname  = name
-        else
-            specification.name = name
-        end
-    end
-end
-
---[[doc--
-
-    {\bfseries EXPERIMENTAL}:
-    \identifier{kpse}-only resolver, for those who can do without
-    system fonts.
-
---doc]]--
-
-request_resolvers.kpse = function (specification)
-    local name       = specification.name
-    local suffix     = filesuffix(name)
-    if suffix and formats[suffix] then
-        name = file.removesuffix(name)
-        if resolvers.findfile(name, suffix) then
-            specification.forced       = suffix
-            specification.forcedname   = name
-            return
-        end
-    end
-    for t, format in next, formats do --- brute force
-        if kpse.find_file (name, format) then
-            specification.forced = t
-            specification.name   = name
-            return
-        end
-    end
-end
-
---[[doc--
-
-    The \verb|name:| resolver wraps the database function
-    \luafunction{resolve_name}.
-
---doc]]--
-
---- fonts.names.resolvers.name -- Customized version of the
---- generic name resolver.
-
-request_resolvers.name = function (specification)
-    local resolved, subfont = resolve_name (specification)
-    if resolved then
-        specification.resolved   = resolved
-        specification.sub        = subfont
-        specification.forced     = filesuffix (resolved)
-        specification.forcedname = resolved
-        specification.name       = fileremovesuffix (resolved)
-    else
-        file_resolver (specification)
-    end
-end
-
---[[doc--
-
-    Also {\bfseries EXPERIMENTAL}: custom file resolvers via callback.
-
---doc]]--
-create_callback("luaotfload.resolve_font", "simple", dummy_function)
-
-request_resolvers.my = function (specification)
-    call_callback("luaotfload.resolve_font", specification)
-end
-
---[[doc--
-
-    We create a callback for patching fonts on the fly, to be used by
-    other packages.
-    It initially contains the empty function that we are going to
-    override below.
-
---doc]]--
-
-create_callback("luaotfload.patch_font", "simple", dummy_function)
-
---[[doc--
-
-    \subsection{\CONTEXT override}
-    \label{define-font}
-    We provide a simplified version of the original font definition
-    callback.
-
---doc]]--
-
-local read_font_file = fonts.definers.read
-
---- spec -> size -> id -> tmfdata
-local patch_defined_font = function (specification, size, id)
-    local tfmdata = read_font_file(specification, size, id)
-    if type(tfmdata) == "table" and tfmdata.shared then
-        --- We need to test for the “shared” field here
-        --- or else the fontspec capheight callback will
-        --- operate on tfm fonts.
-        call_callback("luaotfload.patch_font", tfmdata, specification)
-    end
-    return tfmdata
-end
-
-reset_callback "define_font"
-
---[[doc--
-
-    Finally we register the callbacks.
-
---doc]]--
-
-local font_definer = config.luaotfload.definer
-
-if font_definer == "generic"  then
-  add_to_callback("define_font",
-                  fonts.definers.read,
-                  "luaotfload.define_font",
-                  1)
-elseif font_definer == "patch"  then
-  add_to_callback("define_font",
-                  patch_defined_font,
-                  "luaotfload.define_font",
-                  1)
-end
-
-loadmodule "features.lua"     --- contains what was “font-ltx” and “font-otc”
-loadmodule "letterspace.lua"  --- extra character kerning
-loadmodule "auxiliary.lua"    --- additionaly high-level functionality (new)
-
-luaotfload.aux.start_rewrite_fontname () --- to be migrated to fontspec
-
--- vim:tw=79:sw=4:ts=4:et