adding a first working version of luaotfload

1 files changed, 109 insertions, 0 deletions

diff --git a/otfl-font-xtx.lua b/otfl-font-xtx.lua
new file mode 100644
index 0000000..5672068
--- /dev/null
+++ b/otfl-font-xtx.lua
@@ -0,0 +1,109 @@
+if not modules then modules = { } end modules ['font-xtx'] = {
+    version   = 1.001,
+    comment   = "companion to font-ini.tex",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local texsprint, count = tex.sprint, tex.count
+local format, concat, gmatch, match, find, lower = string.format, table.concat, string.gmatch, string.match, string.find, string.lower
+local tostring, next = tostring, next
+
+local trace_defining = false  trackers.register("fonts.defining", function(v) trace_defining = v end)
+
+--[[ldx--
+<p>Choosing a font by name and specififying its size is only part of the
+game. In order to prevent complex commands, <l n='xetex'/> introduced
+a method to pass feature information as part of the font name. At the
+risk of introducing nasty parsing and compatinility problems, this
+syntax was expanded over time.</p>
+
+<p>For the sake of users who have defined fonts using that syntax, we
+will support it, but we will provide additional methods as well.
+Normally users will not use this direct way, but use a more abstract
+interface.</p>
+
+<p>The next one is the official one. However, in the plain
+variant we need to support the crappy [] specification as
+well and that does not work too well with the general design
+of the specifier.</p>
+--ldx]]--
+
+--~ function fonts.define.specify.colonized(specification) -- xetex mode
+--~     local list = { }
+--~     if specification.detail and specification.detail ~= "" then
+--~         for v in gmatch(specification.detail,"%s*([^;]+)%s*") do
+--~             local a, b = match(v,"^(%S*)%s*=%s*(%S*)$")
+--~             if a and b then
+--~                 list[a] = b:is_boolean()
+--~                 if type(list[a]) == "nil" then
+--~                     list[a] = b
+--~                 end
+--~             else
+--~                 local a, b = match(v,"^([%+%-]?)%s*(%S+)$")
+--~                 if a and b then
+--~                     list[b] = a ~= "-"
+--~                 end
+--~             end
+--~         end
+--~     end
+--~     specification.features.normal = list
+--~     return specification
+--~ end
+
+--~ check("oeps/BI:+a;-b;c=d")
+--~ check("[oeps]/BI:+a;-b;c=d")
+--~ check("file:oeps/BI:+a;-b;c=d")
+--~ check("name:oeps/BI:+a;-b;c=d")
+
+local list = { }
+
+fonts.define.specify.colonized_default_lookup = "file"
+
+local function issome() list.lookup = fonts.define.specify.colonized_default_lookup end
+local function isfile() list.lookup = 'file' end
+local function isname() list.lookup = 'name' end
+local function thename(s) list.name = s end
+local function iscrap(s) list.crap = string.lower(s) end
+local function istrue(s) list[s] = 'yes' end
+local function isfalse(s) list[s] = 'no' end
+local function iskey(k,v) list[k] = v  end
+
+local spaces     = lpeg.P(" ")^0
+local namespec   = (1-lpeg.S("/: "))^0
+local crapspec   = spaces * lpeg.P("/") * (((1-lpeg.P(":"))^0)/iscrap) * spaces
+local filename   = (lpeg.P("file:")/isfile * (namespec/thename)) + (lpeg.P("[") * lpeg.P(true)/isname * (((1-lpeg.P("]"))^0)/thename) * lpeg.P("]"))
+local fontname   = (lpeg.P("name:")/isname * (namespec/thename)) + lpeg.P(true)/issome * (namespec/thename)
+local sometext   = (lpeg.R("az") + lpeg.R("AZ") + lpeg.R("09"))^1
+local truevalue  = lpeg.P("+") * spaces * (sometext/istrue)
+local falsevalue = lpeg.P("-") * spaces * (sometext/isfalse)
+local keyvalue   = (lpeg.C(sometext) * spaces * lpeg.P("=") * spaces * lpeg.C(sometext))/iskey
+local somevalue  = sometext/istrue
+local option     = spaces * (keyvalue + falsevalue + truevalue + somevalue) * spaces
+local options    = lpeg.P(":") * spaces * (lpeg.P(";")^0  * option)^0
+local pattern    = (filename + fontname) * crapspec^0 * options^0
+
+function fonts.define.specify.colonized(specification) -- xetex mode
+    list = { }
+    pattern:match(specification.specification)
+    for k, v in next, list do
+        list[k] = v:is_boolean()
+        if type(list[a]) == "nil" then
+            list[k] = v
+        end
+    end
+    list.crap = nil -- style not supported, maybe some day
+    if list.name then
+        specification.name = list.name
+        list.name = nil
+    end
+    if list.lookup then
+        specification.lookup = list.lookup
+        list.lookup = nil
+    end
+    specification.features.normal = list
+    return specification
+end
+
+fonts.define.register_split(":", fonts.define.specify.colonized)