beta 2011.06.25 11:24

1 files changed, 213 insertions, 0 deletions

diff --git a/tex/generic/context/luatex/luatex-fonts.lua b/tex/generic/context/luatex/luatex-fonts.lua
new file mode 100644
index 000000000..1d844911d
--- /dev/null
+++ b/tex/generic/context/luatex/luatex-fonts.lua
@@ -0,0 +1,213 @@
+if not modules then modules = { } end modules ['luatex-fonts'] = {
+    version   = 1.001,
+    comment   = "companion to luatex-fonts.tex",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+-- The following code isolates the generic ConTeXt code from already
+-- defined or to be defined namespaces.
+
+-- todo: all global namespaces in called modules will get local shortcuts
+
+utf = unicode.utf8
+
+if not generic_context then
+
+    generic_context  = { }
+
+end
+
+if not generic_context.push_namespaces then
+
+    function generic_context.push_namespaces()
+        texio.write(" <push namespace>")
+        local normalglobal = { }
+        for k, v in next, _G do
+            normalglobal[k] = v
+        end
+        return normalglobal
+    end
+
+    function generic_context.pop_namespaces(normalglobal,isolate)
+        if normalglobal then
+            texio.write(" <pop namespace>")
+            for k, v in next, _G do
+                if not normalglobal[k] then
+                    generic_context[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(generic_context,_G)
+        else
+            texio.write(" <fatal error: invalid pop of generic_context>")
+            os.exit()
+        end
+    end
+
+end
+
+local whatever = generic_context.push_namespaces()
+
+-- We keep track of load time by storing the current time. That
+-- way we cannot be accused of slowing down loading too much.
+--
+-- Please don't update to this version without proper testing. It
+-- might be that this version lags behind stock context and the only
+-- formal release takes place around tex live code freeze.
+
+local starttime = os.gettimeofday()
+
+-- As we don't use the ConTeXt file searching, we need to
+-- initialize the kpse library. As the progname can be anything
+-- we will temporary switch to the ConTeXt namespace if needed.
+-- Just adding the context paths to the path specification is
+-- somewhat faster
+
+-- kpse.set_program_name("luatex")
+
+local ctxkpse = nil
+local verbose = true
+
+local function loadmodule(name,continue)
+    local foundname = kpse.find_file(name,"tex") or ""
+    if not foundname then
+        if not ctxkpse then
+            ctxkpse = kpse.new("luatex","context")
+        end
+        foundname = ctxkpse:find_file(name,"tex") or ""
+    end
+    if foundname == "" then
+        if not continue then
+            texio.write_nl(string.format(" <luatex-fonts: unable to locate %s>",name))
+            os.exit()
+        end
+    else
+        if verbose then
+            texio.write(string.format(" <%s>",foundname)) -- no file.basename yet
+        end
+        dofile(foundname)
+    end
+end
+
+loadmodule('luatex-fonts-merged.lua',true) -- you might comment this line
+
+if fonts then
+
+    if not fonts._merge_loaded_message_done_ then
+        texio.write_nl("log", "!")
+        texio.write_nl("log", "! I am using the merged version of 'luatex-fonts.lua' here. If")
+        texio.write_nl("log", "! you run into problems or experience unexpected behaviour, and")
+        texio.write_nl("log", "! if you have ConTeXt installed you can try to delete the file")
+        texio.write_nl("log", "! 'luatex-font-merged.lua' as I might then use the possibly")
+        texio.write_nl("log", "! updated libraries. The merged version is not supported as it")
+        texio.write_nl("log", "! is a frozen instance. Problems can be reported to the ConTeXt")
+        texio.write_nl("log", "! mailing list.")
+        texio.write_nl("log", "!")
+    end
+
+    fonts._merge_loaded_message_done_ = true
+
+else
+
+    -- The following helpers are a bit overkill but I don't want to
+    -- mess up ConTeXt code for the sake of general generality. Around
+    -- version 1.0 there will be an official api defined.
+
+    loadmodule('l-string.lua')
+    loadmodule('l-table.lua')
+    loadmodule('l-lpeg.lua')
+    loadmodule('l-boolean.lua')
+    loadmodule('l-math.lua')
+    loadmodule('l-file.lua')
+    loadmodule('l-io.lua')
+
+    -- The following modules contain code that is either not used
+    -- at all outside ConTeXt or will fail when enabled due to
+    -- lack of other modules.
+
+    -- First we load a few helper modules. This is about the miminum
+    -- needed to let the font modules do their work. Don't depend on
+    -- their functions as we might strip them in future versions of
+    -- this generic variant.
+
+    loadmodule('luatex-basics-gen.lua')
+    loadmodule('data-con.lua')
+
+    -- We do need some basic node support. The code in there is not for
+    -- general use as it might change.
+
+    loadmodule('luatex-basics-nod.lua')
+
+    -- Now come the font modules that deal with traditional TeX fonts
+    -- as well as open type fonts. We only support OpenType fonts here.
+    --
+    -- The font database file (if used at all) must be put someplace
+    -- visible for kpse and is not shared with ConTeXt. The mtx-fonts
+    -- script can be used to genate this file (using the --names
+    -- option).
+
+    loadmodule('font-ini.lua')
+    loadmodule('font-con.lua')
+    loadmodule('luatex-fonts-enc.lua') -- will load font-age on demand
+    loadmodule('font-cid.lua')
+    loadmodule('font-map.lua')         -- for loading lum file (will be stripped)
+    loadmodule('luatex-fonts-syn.lua') -- deals with font names (synonyms)
+    loadmodule('luatex-fonts-tfm.lua')
+    loadmodule('font-oti.lua')
+    loadmodule('font-otf.lua')
+    loadmodule('font-otb.lua')
+    loadmodule('node-inj.lua')         -- will be replaced (luatex >= .70)
+    loadmodule('font-otn.lua')
+ -- loadmodule('luatex-fonts-chr.lua')
+    loadmodule('font-ota.lua')
+    loadmodule('luatex-fonts-lua.lua')
+    loadmodule('font-def.lua')
+    loadmodule('luatex-fonts-def.lua')
+    loadmodule('luatex-fonts-ext.lua') -- some extensions
+
+    -- We need to plug into a callback and the following module implements
+    -- the handlers. Actual plugging in happens later.
+
+    loadmodule('luatex-fonts-cbk.lua')
+
+end
+
+resolvers.loadmodule = loadmodule
+
+-- In order to deal with the fonts we need to initialize some
+-- callbacks. One can overload them later on if needed. First
+-- a bit of abstraction.
+
+generic_context.callback_ligaturing           = false
+generic_context.callback_kerning              = false
+generic_context.callback_pre_linebreak_filter = nodes.simple_font_handler
+generic_context.callback_hpack_filter         = nodes.simple_font_handler
+generic_context.callback_define_font          = fonts.definers.read
+
+-- The next ones can be done at a different moment if needed. You can create
+-- a generic_context namespace and set no_callbacks_yet to true, load this
+-- module, and enable the callbacks later.
+
+if not generic_context.no_callbacks_yet then
+
+    callback.register('ligaturing',           generic_context.callback_ligaturing)
+    callback.register('kerning',              generic_context.callback_kerning)
+    callback.register('pre_linebreak_filter', generic_context.callback_pre_linebreak_filter)
+    callback.register('hpack_filter',         generic_context.callback_hpack_filter)
+    callback.register('define_font' ,         generic_context.callback_define_font)
+
+end
+
+-- We're done.
+
+texio.write(string.format(" <luatex-fonts.lua loaded in %0.3f seconds>", os.gettimeofday()-starttime))
+
+generic_context.pop_namespaces(whatever)