Module:ItemBoxGive feedback

Documentation for this module may be created at Module:ItemBox/doc

local p = {}

local function charWidth(cp)
    -- Fullwidth & Wide ranges (CJK, Hangul, etc.) → 2 units
    if
        (cp >= 0x1100  and cp <= 0x115F)  or  -- Hangul Jamo
        (cp >= 0x2E80  and cp <= 0x303E)  or  -- CJK radicals, Kangxi
        (cp >= 0x3041  and cp <= 0x33BF)  or  -- Hiragana, Katakana, CJK compat
        (cp >= 0x33FF  and cp <= 0xA4CF)  or  -- CJK unified
        (cp >= 0xA960  and cp <= 0xA97F)  or  -- Hangul Jamo Extended
        (cp >= 0xAC00  and cp <= 0xD7FF)  or  -- Hangul syllables
        (cp >= 0xF900  and cp <= 0xFAFF)  or  -- CJK compatibility ideographs
        (cp >= 0xFE10  and cp <= 0xFE1F)  or  -- Vertical forms
        (cp >= 0xFE30  and cp <= 0xFE6F)  or  -- CJK compatibility forms
        (cp >= 0xFF01  and cp <= 0xFF60)  or  -- Fullwidth Latin/punctuation
        (cp >= 0xFFE0  and cp <= 0xFFE6)  or  -- Fullwidth signs
        (cp >= 0x1B000 and cp <= 0x1B0FF) or  -- Kana supplement
        (cp >= 0x1F300 and cp <= 0x1F9FF) or  -- Emoji block
        (cp >= 0x20000 and cp <= 0x2FFFD) or  -- CJK Extension B–F
        (cp >= 0x30000 and cp <= 0x3FFFD)     -- CJK Extension G+
    then
        return 2

    -- Narrow Latin specifics
    elseif cp == 0x69 or cp == 0x6C or  -- i, l
           cp == 0x49 or                -- I
           cp == 0x31 or                -- 1
           cp == 0x21 or cp == 0x7C    -- !, |
    then
        return 0.5

    -- Wide Latin
    elseif cp == 0x6D or cp == 0x77 or  -- m, w
           cp == 0x4D or cp == 0x57    -- M, W
    then
        return 1.5

    -- Cyrillic and other "ambiguous" scripts — slightly wider than Latin
    elseif cp >= 0x0400 and cp <= 0x04FF then
        -- Wide Cyrillic (1.5)
            local wide = {
                [0x0416]=true, [0x0436]=true, -- Ж ж
                [0x041C]=true, [0x043C]=true, -- М м
                [0x0424]=true, [0x0444]=true, -- Ф ф
                [0x0428]=true, [0x0448]=true, -- Ш ш
                [0x0429]=true, [0x0449]=true, -- Щ щ
                [0x042E]=true, [0x044E]=true, -- Ю ю
                [0x042B]=true, [0x044B]=true, -- Ы ы
            }
            -- Narrow Cyrillic (0.5)
            local narrow = {
                [0x0406]=true, [0x0456]=true, -- І і (Ukrainian I)
                [0x0407]=true, [0x0457]=true, -- Ї ї
            }

            if wide[cp] then
                return 1.5
            elseif narrow[cp] then
                return 0.5
            else
                return 1.1
            end

    -- Default for everything else (Arabic, Hebrew, Thai, etc.)
    else
        return 1
    end
end

local function wordWidth(word)
    local width = 0
    for i = 1, mw.ustring.len(word) do
    	local cp = mw.ustring.codepoint(word, i, i)
    	width = width + charWidth(cp)
	end
    return math.ceil(width)
end

function p.getFontSize(frame)
    local name = frame.args[1] or ""
    local words = {}
    for word in name:gmatch("%S+") do
        table.insert(words, word)
    end
    
    local longestLine = 0

    if #words == 1 then
        longestLine = wordWidth(words[1])

    elseif #words == 2 then
        longestLine = math.max(wordWidth(words[1]), wordWidth(words[2]))

    elseif #words == 3 then
        local first = wordWidth(words[1])
        local mid   = wordWidth(words[2])
        local last  = wordWidth(words[3])

        local shorterOuter = math.min(first, last)
        local longerOuter  = math.max(first, last)

        local combined = mid + 1 + shorterOuter

        longestLine = math.max(combined, longerOuter)
    else
	    -- 4+ words: take the max of all individual word widths
	    for _, word in ipairs(words) do
	        longestLine = math.max(longestLine, wordWidth(word))
	    end
    end

	local fullSize = 15
    local fontSize

    if longestLine <= 8 then
        fontSize = fullSize
    else
        fontSize = fullSize - (longestLine - 8) * 1
    end
    
    fontSize = math.max(6, fontSize)

    return fontSize
end

return p