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Diffstat (limited to 'otfl-font-xtx.lua')
| -rw-r--r-- | otfl-font-xtx.lua | 109 |
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) |