Merge ../luaotfload-compat

1 files changed, 266 insertions, 0 deletions

diff --git a/luaotfload-legacy.lua b/luaotfload-legacy.lua
new file mode 100644
index 0000000..e0c2230
--- /dev/null
+++ b/luaotfload-legacy.lua
@@ -0,0 +1,266 @@
+module("luaotfload", package.seeall)
+
+luaotfload.module = {
+    name          = "luaotfload-legacy",
+    version       = 1.31,
+    date          = "2013/04/25",
+    description   = "Unsupported Luaotfload",
+    author        = "Elie Roux & Hans Hagen",
+    copyright     = "Elie Roux",
+    license       = "GPL v2"
+}
+
+local error, warning, info, log = luatexbase.provides_module(luaotfload.module)
+
+--[[doc--
+
+   This used to be a necessary initalization in order not to rebuild an
+   existing font.  Maybe 600 should be replaced by |\pdfpkresolution|
+   or |texconfig.pk_dpi| (and it should be replaced dynamically), but
+   we don't have access (yet) to the |texconfig| table, so we let it be
+   600. Anyway, it does still work fine even if |\pdfpkresolution| is
+   changed.
+
+--doc]]--
+
+kpse.init_prog("", 600, "/")
+
+--[[doc--
+
+   The minimal required \luatex version.
+   We are tolerant folks.
+
+--doc]]--
+
+local luatex_version = 60
+if tex.luatexversion < luatex_version then
+    warning("LuaTeX v%.2f is old, v%.2f is required, v0.76 recommended.",
+             tex.luatexversion/100,
+             luatex_version   /100)
+end
+
+--[[doc--
+
+    \subsection{Module loading}
+    We load the outdated \context files with this function. It
+    automatically adds the |otfl-| prefix to it, so that we call it with
+    the actual \context name.
+
+--doc]]--
+
+function luaotfload.loadmodule(tofind)
+    local found = kpse.find_file(tofind,"tex")
+    if found then
+        log("loading file %s.", found)
+        dofile(found)
+    else
+        error("file %s not found.", tofind)
+    end
+end
+local loadmodule = luaotfload.loadmodule
+
+--[[doc--
+
+    Keep away from these lines!
+
+--doc]]--
+loadmodule"luaotfload-legacy-merged.lua"
+
+if not fonts then
+  loadmodule("otfl-luat-dum.lua") -- not used in context at all
+  loadmodule("otfl-luat-ovr.lua") -- override some luat-dum functions
+  loadmodule("otfl-data-con.lua") -- maybe some day we don't need this one
+  loadmodule("otfl-font-ini.lua")
+  loadmodule("otfl-node-dum.lua")
+  loadmodule("otfl-node-inj.lua")
+--[[doc--
+   By default \context takes some private attributes for internal use. To
+   avoide attribute clashes with other packages, we override the function
+   that allocates new attributes, making it a wraper around
+   |luatexbase.new_attribute()|. We also prefix attributes with |otfl@| to
+   avoid possiple name clashes.
+--doc]]--
+  loadmodule("luaotfload-legacy-attributes.lua") -- patch attributes
+--[[doc--
+   Font handling modules.
+--doc]]--
+  loadmodule("otfl-font-tfm.lua")
+  loadmodule("otfl-font-cid.lua")
+  loadmodule("otfl-font-ott.lua")
+  loadmodule("otfl-font-map.lua")
+  loadmodule("otfl-font-otf.lua")
+  loadmodule("otfl-font-otd.lua")
+  loadmodule("otfl-font-oti.lua")
+  loadmodule("otfl-font-otb.lua")
+  loadmodule("otfl-font-otn.lua")
+  loadmodule("otfl-font-ota.lua")
+  loadmodule("otfl-font-otc.lua")
+  loadmodule("otfl-font-def.lua")
+--[[doc--
+   \textsf{old luaotfload} specific modules.
+--doc]]--
+  loadmodule("otfl-font-xtx.lua")
+  loadmodule("otfl-font-dum.lua")
+  loadmodule("otfl-font-clr.lua")
+end
+loadmodule"luaotfload-legacy-database.lua" --- unmerged coz needed in db script
+
+--[[doc--
+
+    This is a patch for |otfl-font-def.lua|, that defines a reader for ofm
+    fonts, this is necessary if we set the forced field of the specification
+    to |ofm|.
+
+--doc]]--
+
+if fonts and fonts.tfm and fonts.tfm.readers then
+    fonts.tfm.readers.ofm = fonts.tfm.readers.tfm
+end
+
+--[[doc--
+
+    \subsection{Post-processing TFM table}
+    Here we do some final touches to the loaded TFM table before passing it
+    to the \tex end.
+    First we create a callback for patching fonts on the fly, to be used by
+    other packages.
+
+--doc]]--
+
+luatexbase.create_callback("luaotfload.patch_font", "simple", function() end)
+
+--[[doc--
+
+    then define a function where font manipulation will take place.
+
+--doc]]--
+
+local function def_font(...)
+    local fontdata = fonts.define.read(...)
+    if type(fontdata) == "table" and fontdata.shared then
+--[[doc--
+
+    Then we populate |MathConstants| table, which is required for
+    OpenType math.
+
+    Note: actually it isn’t, but you’re asking for it by using outdated
+    code.
+
+--doc]]--
+        local otfdata = fontdata.shared.otfdata
+        if otfdata.metadata.math then
+            local mc = { }
+            for k,v in next, otfdata.metadata.math do
+                if k:find("Percent") then
+                    -- keep percent values as is
+                    mc[k] = v
+                else
+                    mc[k] = v / fontdata.units * fontdata.size
+                end
+            end
+            -- for \overwithdelims
+            mc.FractionDelimiterSize             = 1.01 * fontdata.size
+            mc.FractionDelimiterDisplayStyleSize = 2.39 * fontdata.size
+
+            fontdata.MathConstants = mc
+        end
+--[[doc--
+
+    Execute any registered font patching callbacks.
+
+--doc]]--
+        luatexbase.call_callback("luaotfload.patch_font", fontdata)
+    end
+    return fontdata
+end
+
+--[[doc--
+\subsection{\context override}
+
+    We have a unified function for both file and name resolver. This
+    line is commented as it makes database reload too often. This means
+    that in some cases, a font in the database will not be found if
+    it's not in the texmf tree. A similar thing will reappear in next
+    version.
+
+--doc]]--
+
+--fonts.define.resolvers.file = fonts.define.resolvers.name
+
+--[[doc--
+
+    Overriding some defaults set in \context code.
+
+--doc]]--
+
+fonts.mode = "node"
+
+--[[doc--
+
+    The following features are useful in math (e.g. in XITS Math font),
+    but \textsf{luaotfload} does not recognize them in |base| mode.
+
+--doc]]--
+
+local register_base_sub = fonts.otf.features.register_base_substitution
+local gsubs = {
+    "ss01", "ss02", "ss03", "ss04", "ss05",
+    "ss06", "ss07", "ss08", "ss09", "ss10",
+    "ss11", "ss12", "ss13", "ss14", "ss15",
+    "ss16", "ss17", "ss18", "ss19", "ss20",
+}
+
+for _,v in next, gsubs do
+    register_base_sub(v)
+end
+
+--[[doc--
+
+    Finally we register the callbacks
+
+--doc]]--
+
+luatexbase.add_to_callback("pre_linebreak_filter",
+                            nodes.simple_font_handler,
+                           "luaotfload.pre_linebreak_filter")
+luatexbase.add_to_callback("hpack_filter",
+                            nodes.simple_font_handler,
+                           "luaotfload.hpack_filter")
+luatexbase.reset_callback("define_font")
+luatexbase.add_to_callback("define_font",
+                            def_font,
+                           "luaotfload.define_font", 1)
+luatexbase.add_to_callback("find_vf_file",
+                            fonts.vf.find,
+                           "luaotfload.find_vf_file")
+--[[doc--
+
+    XXX: see https://github.com/wspr/unicode-math/issues/185
+    \luatex does not provide interface to accessing
+    |(Script)ScriptPercentScaleDown| math constants, so we
+    emulate \xetex behaviour by setting |\fontdimen10| and
+    |\fontdimen11|.
+
+    Note: actually, it does now, but not unless you update.
+
+--doc]]--
+
+local function set_sscale_diments(fontdata)
+    local mc = fontdata.MathConstants
+    if mc then
+        if mc["ScriptPercentScaleDown"] then
+            fontdata.parameters[10] = mc.ScriptPercentScaleDown
+        else -- resort to plain TeX default
+            fontdata.parameters[10] = 70
+        end
+        if mc["ScriptScriptPercentScaleDown"] then
+            fontdata.parameters[11] = mc.ScriptScriptPercentScaleDown
+        else -- resort to plain TeX default
+            fontdata.parameters[11] = 50
+        end
+    end
+end
+
+luatexbase.add_to_callback("luaotfload.patch_font", set_sscale_diments, "unicodemath.set_sscale_diments")
+
+-- vim:ts=2:sw=2:expandtab:ft=lua