Modul:Text

Die Dokumentation für dieses Modul kann unter Modul:Text/Doku erstellt werden

--[=[ 2013-11-07
Text utilities
]=]



local Text = { }
local patternCJK        = false
local patternLatin      = false
local patternTerminated = false



Text.containsCJK = function ( analyse )
    -- Is any CJK code within?
    -- Parameter:
    --     analyse  -- string
    -- Returns: true, if CJK detected
    if not patternCJK then
        patternCJK = mw.ustring.char( 91,
                                       13312, 45,  40959,
                                      131072, 45, 178207,
                                      93 )
    end
    if mw.ustring.find( analyse, patternCJK ) then
        r = true
    else
        r = false
    end
    return r
end -- Text.containsCJK()



Text.sentenceTerminated = function ( analyse )
    -- Is string terminated by dot, question or exclamation mark?
    --     Quotation, link termination and so on granted
    -- Parameter:
    --     analyse  -- string
    -- Returns: true, if sentence terminated
    local r
    if not patternTerminated then
        patternTerminated = mw.ustring.char( 91,
                                             12290,
                                             65281,
                                             65294,
                                             65311 )
                            .. "!%.%?…][\"'%]‹›«»‘’“”]*$"
    end
    if mw.ustring.find( analyse, patternTerminated ) then
        r = true
    else
        r = false
    end
    return r
end -- Text.sentenceTerminated()



Text.uprightNonlatin = function ( adjust )
    -- Ensure non-italics for non-latin text parts
    --     One single greek letter might be granted
    -- Precondition:
    --     adjust  -- string
    -- Returns: string with non-latin parts enclosed in <span>
    local r
    if not patternLatin then
        patternLatin = mw.ustring.char(   94, 91,
                                           7, 45,  591,
                                        8194, 45, 8250,
                                          93, 42, 36 )
    end
    if mw.ustring.match( adjust, patternLatin ) then
        -- latin only, horizontal dashes, quotes
        r = adjust
    else
        local c
        local j    = false
        local k    = 1
        local m    = false
        local n    = mw.ustring.len( adjust )
        local span = "%s%s<span style='font-style:normal'>%s</span>"
        local flat = function ( a )
                -- isLatin
                return  a <= 591   or   ( a >= 8194  and  a <= 8250 )
        end -- flat()
        local form = function ( a )
                return string.format( span,
                                      r,
                                      mw.ustring.sub( adjust, k, j - 1 ),
                                      mw.ustring.sub( adjust, j, a ) )
        end -- form()
        r = ""
        for i = 1, n do
            c = mw.ustring.codepoint( adjust, i, i )
            if c > 32 then
                if flat( c ) then
                    if j then
                        if m then
                            if i == m then
                                -- single greek letter.
                                j = false
                            end
                            m = false
                        end
                        if j then
                            r = form( i - 1 )
                            j = false
                            k = i
                        end
                    end
                elseif not j then
                    j = i
                    if c >= 880  and  c <= 1023 then
                        -- single greek letter?
                        m = i + 1
                    else
                        m = false
                    end
                end
            elseif m then
                m = m + 1
            end
        end -- for i
        if j  and  m < n then
            r = form( n )
        else
            r = r .. mw.ustring.sub( adjust, k )
        end
    end
    return r
end -- Text.uprightNonlatin()



-- Export
local p = { }

function p.containsCJK( frame )
    return Text.containsCJK( frame.args[ 1 ] or "" ) and "1" or ""
end

function p.sentenceTerminated( frame )
    return Text.sentenceTerminated( frame.args[ 1 ] or "" ) and "1" or ""
end

function p.uprightNonlatin( frame )
    return Text.uprightNonlatin( frame.args[ 1 ] or "" )
end

p.Text = function ()
    return Text
end -- p.Text

return p