-- @titre Caractères sans dessin
-- @title Characters with no drawing
-- @categorie relire
-- @resume Les glyphes codés (qui portent un caractère Unicode) restés vides dans au moins un master, espaces et caractères invisibles exceptés. En option, ils sont marqués en gris.
-- @summary Encoded glyphs (carrying a Unicode character) still empty in at least one master, spaces and invisible characters excepted. Optionally, they get a grey label.
-- Fontista · bibliothèque de scripts · https://fontista.thinkspark.dev/scripts.html

local MARK = false -- true: give them the grey colour label

local en = lang == "en"
local function invisible(cp)
  return cp < 0x21 or (cp >= 0x7F and cp <= 0xA0) or cp == 0xAD or cp == 0x034F
    or (cp >= 0x2000 and cp <= 0x200F) or (cp >= 0x2028 and cp <= 0x202F)
    or (cp >= 0x205F and cp <= 0x2064) or cp == 0x3000 or cp == 0xFEFF
end
local found = 0
for _, g in ipairs(font.glyphs) do
  local info = glyph(g)
  if info and info.unicode and info.export ~= false and not invisible(info.unicode) then
    local missing = {}
    for _, m in ipairs(font.masters) do
      local l = layer(g, m.id)
      if not l or l.empty then missing[#missing + 1] = m.name end
    end
    if #missing > 0 then
      found = found + 1
      print(string.format("%-24s U+%04X  %s   %s", g, info.unicode, utf8.char(info.unicode), table.concat(missing, ", ")))
      if MARK then set_mark(g, 7) end
    end
  end
end
if found == 0 then
  print(en and "Every encoded character is drawn in every master." or "Tous les caractères codés sont dessinés dans tous les masters.")
else
  print(string.format(en and "%d character(s) without drawing" or "%d caractère(s) sans dessin", found))
end