diff options
| -rw-r--r-- | luaotfload-features.lua | 36 |
1 files changed, 30 insertions, 6 deletions
diff --git a/luaotfload-features.lua b/luaotfload-features.lua index f541964..7ae035b 100644 --- a/luaotfload-features.lua +++ b/luaotfload-features.lua @@ -35,6 +35,7 @@ local report = logs.names_report local stringfind = string.find local stringlower = string.lower local stringgsub = string.gsub +local stringsub = string.sub local stringis_empty = string.is_empty --- TODO an option to dump the default features for a script would make @@ -864,13 +865,34 @@ end --- ----------------------------------------------------------------------- +--[[doc-- + + One further incompatibility between Xetex and Luatex-Fonts consists + in their option list syntax: apparently, Xetex requires key-value + options to be prefixed by a "+" (ascii “plus”) character. We + silently accept this as well, dropping the first byte if it is a + plus or minus character. + + Reference: https://github.com/lualatex/luaotfload/issues/79#issuecomment-18104483 + +--doc]]-- + +local strip_leading_sign = function (s) + --- handle option list keys + local first = stringsub(s, 1, 1) + if first == "+" or first == "-" then --- Xetex style + return stringsub(s, 2) + end + return s +end local toboolean = function (s) - if s == "true" then return true end - if s == "false" then return false end ---if s == "yes" then return true end --- Context style ---if s == "no" then return false end - return stringlower(s) + --- handle option list values + if s == "true" then return true end + if s == "false" then return false end + --if s == "yes" then return true end --- Context style + --if s == "no" then return false end + return stringlower(s) end --[[doc-- @@ -956,7 +978,9 @@ local path_lookup = lbrk * Cg(C((1-rbrk)^1), "path") * rbrk local field = (anum + S"+-.")^1 --- sic! --- assignments are “lhs=rhs” --- switches are “+key” | “-key” -local assignment = C(field) * ws * equals * ws * (field / toboolean) +local assignment = (field / strip_leading_sign) * ws + * equals * ws + * (field / toboolean) local switch = P"+" * ws * C(field) * Cc(true) + P"-" * ws * C(field) * Cc(false) + C(field) * Cc(true) -- catch crap |