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fontlist.lua
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fontlist.lua
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local CanvasContext = require("document/canvascontext")
local FontList = {
fontdir = "./fonts",
fontlist = {},
}
--[[
These non-LGC Kindle system fonts fail CRe's moronic header check.
Also applies to a number of LGC fonts that have different family names for different styles...
(Those are actually "fixed" via FontConfig in the stock system).
--]]
local kindle_fonts_blacklist = {
["DiwanMuna-Bold.ttf"] = true,
["DiwanMuna-Regular.ttf"] = true,
["HYGothicBold.ttf"] = true,
["HYGothicMedium.ttf"] = true,
["HYMyeongJoBold.ttf"] = true,
["HYMyeongJoMedium.ttf"] = true,
["KindleBlackboxBoldItalic.ttf"] = true,
["KindleBlackboxBold.ttf"] = true,
["KindleBlackboxItalic.ttf"] = true,
["KindleBlackboxRegular.ttf"] = true,
["Kindle_MonospacedSymbol.ttf"] = true,
["Kindle_Symbol.ttf"] = true,
["MTChineseSurrogates.ttf"] = true,
["MYingHeiTBold.ttf"] = true,
["MYingHeiTMedium.ttf"] = true,
["NotoNaskhArabicUI-Bold.ttf"] = true,
["NotoNaskhArabicUI-Regular.ttf"] = true,
["NotoNaskh-Bold.ttf"] = true,
["NotoNaskh-Regular.ttf"] = true,
["NotoSansBengali-Regular.ttf"] = true,
["NotoSansDevanagari-Regular.ttf"] = true,
["NotoSansGujarati-Regular.ttf"] = true,
["NotoSansKannada-Regular.ttf"] = true,
["NotoSansMalayalam-Regular.ttf"] = true,
["NotoSansTamil-Regular.ttf"] = true,
["NotoSansTelugu-Regular.ttf"] = true,
["SakkalKitab-Bold.ttf"] = true,
["SakkalKitab-Regular.ttf"] = true,
["SongTBold.ttf"] = true,
["SongTMedium.ttf"] = true,
["STHeitiBold.ttf"] = true,
["STHeitiMedium.ttf"] = true,
["STSongBold.ttf"] = true,
["STSongMedium.ttf"] = true,
["TBGothicBold_213.ttf"] = true,
["TBGothicMed_213.ttf"] = true,
["TBMinchoBold_213.ttf"] = true,
["TBMinchoMedium_213.ttf"] = true,
["STKaiMedium.ttf"] = true,
["Amazon-Ember-Bold.ttf"] = false,
["Amazon-Ember-BoldItalic.ttf"] = false,
["Amazon-Ember-Heavy.ttf"] = true,
["Amazon-Ember-HeavyItalic.ttf"] = true,
["Amazon-Ember-Medium.ttf"] = true,
["Amazon-Ember-MediumItalic.ttf"] = true,
["Amazon-Ember-Regular.ttf"] = false,
["Amazon-Ember-RegularItalic.ttf"] = false,
["AmazonEmberBold-Bold.ttf"] = true,
["AmazonEmberBold-BoldItalic.ttf"] = true,
["AmazonEmberBold-Italic.ttf"] = true,
["AmazonEmberBold-Regular.ttf"] = true,
["Caecilia_LT_65_Medium.ttf"] = false,
["Caecilia_LT_66_Medium_Italic.ttf"] = false,
["Caecilia_LT_75_Bold.ttf"] = false,
["Caecilia_LT_76_Bold_Italic.ttf"] = false,
["Caecilia_LT_67_Cond_Medium.ttf"] = true,
["Caecilia_LT_68_Cond_Medium_Italic.ttf"] = true,
["Caecilia_LT_77_Cond_Bold.ttf"] = true,
["Caecilia_LT_78_Cond_Bold_Italic.ttf"] = true,
["Futura-Bold.ttf"] = true,
["Futura-BoldOblique.ttf"] = true,
["Helvetica_LT_65_Medium.ttf"] = true,
["Helvetica_LT_66_Medium_Italic.ttf"] = true,
["Helvetica_LT_75_Bold.ttf"] = true,
["Helvetica_LT_76_Bold_Italic.ttf"] = true,
}
local function isInFontsBlacklist(f)
-- write test for this
return CanvasContext.isKindle() and kindle_fonts_blacklist[f]
end
local function getExternalFontDir()
if CanvasContext.isAndroid() or
CanvasContext.isDesktop() or
CanvasContext.isEmulator() or
CanvasContext.isPocketBook()
then
return require("frontend/ui/elements/font_settings"):getPath()
else
return os.getenv("EXT_FONT_DIR")
end
end
local function _readList(target, dir)
-- lfs.dir non-existent directory will give an error, weird!
local ok, iter, dir_obj = pcall(lfs.dir, dir)
if not ok then return end
for f in iter, dir_obj do
local mode = lfs.attributes(dir.."/"..f, "mode")
if mode == "directory" and f ~= "." and f ~= ".." then
_readList(target, dir.."/"..f)
elseif mode == "file" or mode == "link" then
if string.sub(f, 1, 1) ~= "." then
local file_type = string.lower(string.match(f, ".+%.([^.]+)") or "")
if file_type == "ttf" or file_type == "ttc"
or file_type == "cff" or file_type == "otf" then
if not isInFontsBlacklist(f) then
table.insert(target, dir.."/"..f)
end
end
end
end
end
end
function FontList:getFontList()
if #self.fontlist > 0 then return self.fontlist end
_readList(self.fontlist, self.fontdir)
-- multiple paths should be joined with semicolon
for dir in string.gmatch(getExternalFontDir() or "", "([^;]+)") do
_readList(self.fontlist, dir)
end
table.sort(self.fontlist)
return self.fontlist
end
return FontList