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-rw-r--r--src/luaotfload-main.lua278
1 files changed, 25 insertions, 253 deletions
diff --git a/src/luaotfload-main.lua b/src/luaotfload-main.lua
index a825dc3..d15e082 100644
--- a/src/luaotfload-main.lua
+++ b/src/luaotfload-main.lua
@@ -19,6 +19,10 @@ local luaotfload = luaotfload
luaotfload.log = luaotfload.log or { }
luaotfload.version = "2.6"
luaotfload.loaders = { }
+luaotfload.min_luatex_version = 79 --- i. e. 0.79
+----------.fontloader_package = "fontloader" --- default: from current Context
+luaotfload.fontloader_package = "slim"
+
local authors = "\z
Hans Hagen,\z
@@ -104,16 +108,12 @@ luaotfload.log.tex = {
--doc]]--
-local min_luatex_version = 79 --- i. e. 0.79
---local fontloader_package = "fontloader" --- default: from current Context
-local fontloader_package = "slim"
-
-if tex.luatexversion < min_luatex_version then
+if tex.luatexversion < luaotfload.min_luatex_version then
warning ("LuaTeX v%.2f is old, v%.2f or later is recommended.",
tex.luatexversion / 100,
- min_luatex_version / 100)
+ luaotfload.min_luatex_version / 100)
warning ("using fallback fontloader -- newer functionality not available")
- fontloader_package = "tl2014" --- TODO fallback should be configurable too
+ luaotfload.fontloader_package = "tl2014" --- TODO fallback should be configurable too
--- we install a fallback for older versions as a safety
end
@@ -126,9 +126,25 @@ end
--doc]]--
+local make_loader_name = function (prefix, name)
+ local msg = luaotfload.log and luaotfload.log.report or print
+ if prefix then
+ msg ("log", 7, "load",
+ "Composing fontloader name from constitutents %s, %s",
+ prefix, name)
+ return prefix .. "-" .. name .. ".lua"
+ end
+ msg ("log", 7, "load",
+ "Loading fontloader file %s literally.",
+ name)
+ return name
+end
+
local make_loader = function (prefix)
- return prefix and function (name) require (prefix .. "-" .. name .. ".lua") end
- or function (name) require (name) end
+ return function (name)
+ local modname = make_loader_name (prefix, name)
+ require (modname)
+ end
end
local load_luaotfload_module = make_loader "luaotfload"
@@ -143,250 +159,6 @@ load_luaotfload_module "init" --- fontloader initialization
local log = luaotfload.log
local logreport = log.report
-log.set_loglevel (default_log_level)
-
---[[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 ()
- logreport ("log", 1, "main", "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
- logreport ("log", 1, "main", "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
- logreport ("both", 0, "main",
- "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.
-
- For less current distibutions we ship the code from TL 2014 that should be
- compatible with Luatex 0.76.
-
---doc]]--
-
-load_fontloader_module (fontloader_package)
-
----load_fontloader_module "font-odv.lua" --- <= Devanagari support from Context
-
-if fonts then
-
- --- The Initialization is highly idiosyncratic.
-
- if not fonts._merge_loaded_message_done_ then
- logreport ("log", 5, "main", [["I am using the merged fontloader here.]])
- logreport ("log", 5, "main", [[ If you run into problems or experience unexpected]])
- logreport ("log", 5, "main", [[ behaviour, and if you have ConTeXt installed you can try]])
- logreport ("log", 5, "main", [[ to delete the file 'fontloader-fontloader.lua' as I might]])
- logreport ("log", 5, "main", [[ then use the possibly updated libraries. The merged]])
- logreport ("log", 5, "main", [[ version is not supported as it is a frozen instance.]])
- logreport ("log", 5, "main", [[ 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!
- load_fontloader_module "l-lua"
- load_fontloader_module "l-lpeg"
- load_fontloader_module "l-function"
- load_fontloader_module "l-string"
- load_fontloader_module "l-table"
- load_fontloader_module "l-io"
- load_fontloader_module "l-file"
- load_fontloader_module "l-boolean"
- load_fontloader_module "l-math"
- load_fontloader_module "util-str"
- load_fontloader_module "luatex-basics-gen"
- load_fontloader_module "data-con"
- load_fontloader_module "luatex-basics-nod"
- load_fontloader_module "font-ini"
- load_fontloader_module "font-con"
- load_fontloader_module "luatex-fonts-enc"
- load_fontloader_module "font-cid"
- load_fontloader_module "font-map"
- load_fontloader_module "luatex-fonts-syn"
- load_fontloader_module "luatex-fonts-tfm"
- load_fontloader_module "font-oti"
- load_fontloader_module "font-otf"
- load_fontloader_module "font-otb"
- load_fontloader_module "luatex-fonts-inj" --> since 2014-01-07, replaces node-inj.lua
- load_fontloader_module "luatex-fonts-ota"
- load_fontloader_module "luatex-fonts-otn" --> since 2014-01-07, replaces font-otn.lua
- load_fontloader_module "font-otp" --> since 2013-04-23
- load_fontloader_module "luatex-fonts-lua"
- load_fontloader_module "font-def"
- load_fontloader_module "luatex-fonts-def"
- load_fontloader_module "luatex-fonts-ext"
- load_fontloader_module "luatex-fonts-cbk"
-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)
-
-logreport ("both", 1, "main",
- "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)
-
load_luaotfload_module "override" --- load glyphlist on demand
--[[doc--