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--
-- This is file `fontspec.lua',
-- generated with the docstrip utility.
--
-- The original source files were:
--
-- fontspec.dtx (with options: `lua')
--
-- _________________________________________
-- The fontspec package for XeLaTeX/LuaLaTeX
-- (C) 2004--2011 Will Robertson and Khaled Hosny
--
-- License information appended.
--
--
fontspec = { }
fontspec.module = {
name = "fontspec",
version = 2.0,
date = "2009/12/04",
description = "Advanced font selection for LuaLaTeX.",
author = "Khaled Hosny",
copyright = "Khaled Hosny",
license = "LPPL"
}
local err, warn, info, log = luatexbase.provides_module(fontspec.module)
fontspec.log = log
fontspec.warning = warn
fontspec.error = err
function fontspec.sprint (...) tex.sprint(luatexbase.catcodetables['latex-package'], ...) end
local function check_script(id, script)
local s = string.lower(script)
if id and id > 0 then
local otfdata = fonts.identifiers[id].shared.otfdata
if otfdata then
local features = otfdata.luatex.features
for i,_ in pairs(features) do
for j,_ in pairs(features[i]) do
if features[i][j][s] then
fontspec.log("script '%s' exists in font '%s'",
script, fonts.identifiers[id].fullname)
return true
end
end
end
end
end
end
local function check_language(id, language, script)
local s = string.lower(script)
local l = string.lower(language)
if id and id > 0 then
local otfdata = fonts.identifiers[id].shared.otfdata
if otfdata then
local features = otfdata.luatex.features
for i,_ in pairs(features) do
for j,_ in pairs(features[i]) do
if features[i][j][s] and features[i][j][s][l] then
fontspec.log("language '%s' for script '%s' exists in font '%s'",
language, script, fonts.identifiers[id].fullname)
return true
end
end
end
end
end
end
local function check_feature(id, feature, language, script)
local s = string.lower(script)
local l = string.lower(language)
local f = string.lower(feature:gsub("^[+-]", ""))
if id and id > 0 then
local otfdata = fonts.identifiers[id].shared.otfdata
if otfdata then
local features = otfdata.luatex.features
for i,_ in pairs(features) do
if features[i][f] and features[i][f][s] then
if features[i][f][s][l] == true then
fontspec.log("feature '%s' for language '%s' and script '%s' exists in font '%s'",
feature, language, script, fonts.identifiers[id].fullname)
return true
end
end
end
end
end
end
local function tempswatrue() fontspec.sprint([[\@tempswatrue]]) end
local function tempswafalse() fontspec.sprint([[\@tempswafalse]]) end
function fontspec.check_ot_script(fnt, script)
if check_script(font.id(fnt), script) then
tempswatrue()
else
tempswafalse()
end
end
function fontspec.check_ot_lang(fnt, lang, script)
if check_language(font.id(fnt), lang, script) then
tempswatrue()
else
tempswafalse()
end
end
function fontspec.check_ot_feat(fnt, feat, lang, script)
for _, f in ipairs { "+trep", "+tlig", "+anum" } do
if feat == f then
tempswatrue()
return
end
end
if check_feature(font.id(fnt), feat, lang, script) then
tempswatrue()
else
tempswafalse()
end
end
function fontspec.mathfontdimen(fnt, str)
local mathdimens = fonts.identifiers[font.id(fnt)].MathConstants
if mathdimens then
local m = mathdimens[str]
if m then
fontspec.sprint(mathdimens[str])
fontspec.sprint("sp")
else
fontspec.sprint("0pt")
end
else
fontspec.sprint("0pt")
end
end
local function set_capheight(fontdata)
local capheight
local units = fontdata.units
local size = fontdata.size
local otfdata = fontdata.shared.otfdata
if otfdata.pfminfo.os2_capheight > 0 then
capheight = otfdata.pfminfo.os2_capheight / units * size
else
if fontdata.characters[string.byte("X")] then
capheight = fontdata.characters[string.byte("X")].height
else
capheight = otfdata.metadata.ascent / units * size
end
end
fontdata.parameters[8] = capheight
end
luatexbase.add_to_callback("luaotfload.patch_font", set_capheight, "fontspec.set_capheight")
--
-- Copyright 2004--2011 Will Robertson <wspr81@gmail.com>
-- Copyright 2009--2010 Khaled Hosny <khaledhosny@eglug.org>
--
-- Distributable under the LaTeX Project Public License,
-- version 1.3c or higher (your choice). The latest version of
-- this license is at: http://www.latex-project.org/lppl.txt
--
-- This work is "author-maintained" by Will Robertson.
--
-- This work consists of this file fontspec.dtx
-- and the derived files fontspec.sty,
-- fontspec.lua,
-- fontspec.cfg,
-- fontspec-xetex.tex,
-- fontspec-luatex.tex,
-- and fontspec.pdf.
--
--
-- End of file `fontspec.lua'.
|
