Modul:Text

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---

--[=[ 2014-09-27
Text utilities
]=]



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



Text.concatParams = function ( args, apply, adapt )
    -- Concat list items into one string
    -- Parameter:
    --     args   -- table (sequence) with numKey=string
    --     apply  -- string (optional); separator (default: "|")
    --     adapt  -- string (optional); format including "%s"
    -- Returns: string
    local collect = { }
    for k, v in pairs( args ) do
        if type( k ) == "number" then
            v = mw.text.trim( v )
            if v ~= "" then
                if adapt then
                    v = mw.ustring.format( adapt, v )
                end
                table.insert( collect, v )
            end
        end
    end
    return table.concat( collect,  apply or "|" )
end -- Text.concatParams()



Text.containsCJK = function ( analyse )
    -- Is any CJK code within?
    -- Parameter:
    --     analyse  -- string
    -- Returns: true, if CJK detected
    local r
    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.listToText = function ( args, adapt )
    -- Format list items similar to mw.text.listToText()
    -- Parameter:
    --     args   -- table (sequence) with numKey=string
    --     adapt  -- string (optional); format including "%s"
    -- Returns: string
    local collect = { }
    for k, v in pairs( args ) do
        if type( k ) == "number" then
            v = mw.text.trim( v )
            if v ~= "" then
                if adapt then
                    v = mw.ustring.format( adapt, v )
                end
                table.insert( collect, v )
            end
        end
    end
    return mw.text.listToText( collect )
end -- Text.listToText()



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.ucfirstAll = function ( adjust )
    -- Capitalize all words
    -- Precondition:
    --     adjust  -- string
    -- Returns: string with all first letters in upper case
    local r = " " .. adjust
    local i = 1
    local c, j, m
    if adjust:find( "&" ) then
        r = r:gsub( "&",      "&" )
             :gsub( "<",       "<" )
             :gsub( ">",       ">" )
             :gsub( " ",    " " )
             :gsub( " ", " " )
             :gsub( "‌",   "‌" )
             :gsub( "‍",    "‍" )
             :gsub( "‎",    "‎" )
             :gsub( "‏",    "‏" )
        m = true
    end
    while i do
        i = mw.ustring.find( r, "%W%l", i )
        if i then
            j = i + 1
            c = mw.ustring.upper( mw.ustring.sub( r, j, j ) )
            r = string.format( "%s%s%s",
                               mw.ustring.sub( r, 1, i ),
                               c,
                               mw.ustring.sub( r, i + 2 ) )
            i = j
        end
    end -- while i
    r = r:sub( 2 )
    if m then
        r = r:gsub(     "&", "&" )
             :gsub(     "<", "<" )
             :gsub(     ">", ">" )
             :gsub(    " ", " " )
             :gsub(   " ", " " )
             :gsub(   "‌", "‌" )
             :gsub(   "‍", "‍" )
             :gsub(   "‎", "‎" )
             :gsub(   "‏", "‏" )
             :gsub( "&#X(%x+);", "&#x%1;" )
    end
    return r
end -- Text.ucfirstAll()



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 > 64  or  c == 38  or  c == 60 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
                            local nx = i - 1
                            local s  = ""
                            for ix = nx, 1, -1 do
                                c = mw.ustring.sub( adjust, ix, ix )
                                if c == " "  or  c == "(" then
                                    nx = nx - 1
                                    s  = c .. s
                                else
                                    break -- for ix
                                end
                            end -- for ix
                            r = form( nx ) .. s
                            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  ( not m  or  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.concatParams( frame )
    local args
    local template = frame.args.template
    if type( template ) == "string" then
        template = mw.text.trim( template )
        template = ( template == "1" )
    end
    if template then
        args = frame:getParent().args
    else
        args = frame.args
    end
    return Text.concatParams( args,
                              frame.args.separator,
                              frame.args.format )
end

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

function p.listToText( frame )
    local args
    local template = frame.args.template
    if type( template ) == "string" then
        template = mw.text.trim( template )
        template = ( template == "1" )
    end
    if template then
        args = frame:getParent().args
    else
        args = frame.args
    end
    return Text.listToText( args, frame.args.format )
end

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

function p.ucfirstAll( frame )
    return Text.ucfirstAll( frame.args[ 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