Texter

-- version: Unspeakable Crawling Rachis

Texter = {}
Texter._LastInputStr  = ""
Texter._LastInputArgs = "1, 3"
Texter._LastInputFont = "7px"
Texter._Fonts = {}

------------------ User config zone -------------------
Texter.FONT_FOLDERS_TO_LOAD = {"TexterFonts", "Scripts", "%."}   -- All file will be "dofile" under this foler name, plus the root dir (in regex form %.)
Texter.DISPLAY_MESSAGES     = true              -- Should show the startup message
Texter.FONT_SEARCH_DEPTH    = 3                 -- How deep should texter search the font folder
---------------- User config zone ends ----------------

function Texter.Init(register)
    Texter._Fontmatrix = {}
    Texter._Fonts = {}
    -- Please don't let Texter too far away from font file :)
    local fontFiles = Texter.LoadAllFontsInFolder(".", Texter.FONT_FOLDERS_TO_LOAD, Texter.FONT_SEARCH_DEPTH)
    local msg = ""
    if(Texter._Fontmatrix ~= nil) then
        for fontName in pairs(Texter._Fontmatrix) do
            table.insert(Texter._Fonts, fontName)
        end
        msg = "Texter: "..#fontFiles.." font file(s) loaded, "..#Texter._Fonts.." font(s) available in total."
    else
        msg = "Texter: No font found."
    end
    if( Texter.DISPLAY_MESSAGES ) then
        tpt.log(msg)
    end
    if( register == nil or register == true ) then
        tpt.register_keypress(Texter._HotkeyHandler)
    end
end

-- Internal methods
function Texter._IsFolder(path)
    local _isFolder = false
    if(path ~= nil) then
        -- API bug, not fixed right now (ver 85.0)
        -- if( fs.isDirectory(path)  ) then
                -- _isFolder = true
        -- end
        if( fs.isDirectory(path) == fs.isDirectory(".") ) then
            _isFolder = true
        end
    end
    return _isFolder
end
function Texter._GetFontHeight(fontName)
    local height = 0
    if( Texter._Fontmatrix ~= nil and Texter._Fontmatrix[fontName] ~=nil and Texter._Fontmatrix[fontName].height ~= nil  ) then
        height = Texter._Fontmatrix[fontName].height
    else
        height = 7 -- 7 is a lucky number
    end
    return height
end
function Texter._Input(eventHandler, fonts, paramsText, strText, fontText)
    local controlHeight = 17
    if( paramsText == nil  ) then paramsText = "" end
    if( strText    == nil  ) then strText    = "" end
    if( fontText   == nil  ) then fontText   = "" end
    if( fonts      == nil  ) then fonts      = {} end

    local isContains = function(inTable, value)
        local isContain = false
        for i=1, #inTable do
            if( value == inTable[i]  ) then
                isContain = true
                break
            end
        end
        return isContain
    end

    local TexterWin = Window:new(-1, -1, 500, 100)
    local paramsBox = Textbox:new(10, 32, 252, controlHeight, paramsText, "ptype, hspc, vspc")
    local paramsLabel = Label:new(11, 9, 232, controlHeight, "Enter the element name you want to use and\nthe spacing between letters (horizontal/vertical).")
    local stringBox = Textbox:new(10, 57, 480, controlHeight, strText, "Input text to create under mouse. Use \\n for new line, \\\\n for \\n. Sorry, you can't get \\\\n.")
    local fontBtn = Button:new(282, 32, 208, controlHeight, "No font available")
    local fontLabel = Label:new(283, 9, 150, controlHeight, "Select the font you want to use.")
    local cancelBtn = Button:new(0, 83, 251, controlHeight, "Cancel")
    cancelBtn:action(function(sender)interface.closeWindow(TexterWin)end)
    local okayBtn = Button:new(250, 83, 250, controlHeight, "Okay")
    okayBtn:action(
        function(sender)
            if( eventHandler ~= nil and type(eventHandler) == "function"  ) then
                -- Use event because I can't make things like tpt.input
                eventHandler(paramsBox:text(), stringBox:text(), fontBtn:text())
            end
            interface.closeWindow(TexterWin)
        end
    )

    if(#fonts > 0) then
        if( isContains(fonts, fontText)  ) then
            fontBtn:text(fontText)
        else
            fontBtn:text(fonts[1])
        end
        fontBtn:action(
            function(sender)
                local winX, winY = TexterWin:position()
                local btnX, btnY = fontBtn:position()
                local btnW, btnH = fontBtn:size()
                local listWin = Window:new(winX+btnX, winY+btnY-8*(#fonts-1), btnW, (btnH-1)*#fonts)
                for i=1, #fonts do
                    local optionBtn = Button:new(0, (btnH-1)*(i-1), btnW, btnH, fonts[i])
                    optionBtn:action(
                        function(sender)
                            interface.closeWindow(listWin)
                            fontBtn:text(optionBtn:text())
                        end
                    )
                    listWin:addComponent(optionBtn)
                end
                interface.showWindow(listWin)
            end
        )
    end

    TexterWin:addComponent(cancelBtn)
    TexterWin:addComponent(okayBtn)
    TexterWin:addComponent(stringBox)
    TexterWin:addComponent(paramsBox)
    TexterWin:addComponent(paramsLabel)
    TexterWin:addComponent(fontBtn)
    TexterWin:addComponent(fontLabel)

    interface.showWindow(TexterWin)
end
function Texter._FindAllFile(rootPath, foldersToLoad, depth)
    if(  rootPath == nil  ) then
        rootPath = "."
    end
    if(  depth == nil  ) then
        depth = 1
    end
    local files = {}
    local isTargetFolder = false
    for i, folderName in ipairs(foldersToLoad) do
        if( string.match(rootPath, "\\?"..folderName.."$") ~= nil ) then
            isTargetFolder = true
            break
        end
    end
    if( isTargetFolder ) then  -- If not the folder we want, ignore it
        files = fs.list(rootPath)
    end

    -- Trim match array
    local index = 1 -- Lua fool
    for i=1, #files do
        if( files[index] == "Texter.lua"
          or string.match(files[index], "%.texterfont$") == nil
          or Texter._IsFolder(rootPath.."\\"..files[index]) ) then
            table.remove(files, index)
        else
            files[index] = rootPath.."\\"..files[index] -- full path
            index = index + 1
        end
    end

    -- Check subs
    if(  depth > 0  ) then
        local subs = fs.list(rootPath)
        local subFiles = nil
        for i=1, #subs do
            if( Texter._IsFolder(rootPath.."\\"..subs[i]) ) then
                subFiles = Texter._FindAllFile(rootPath.."\\"..subs[i], foldersToLoad, depth - 1)
                Texter._AppendArray(files, subFiles)
            end
        end
    end
    return files
end
function Texter._AppendArray(oriArray, arrayToAppend) -- Append an array to the original array
    if(  oriArray~= nil and arrayToAppend ~= nil and #arrayToAppend>0  ) then
        for i=1, #arrayToAppend do
            table.insert(oriArray, arrayToAppend[i])
        end
    end
    return oriArray
end

-- Helper methods and handlers
function Texter._HotkeyHandler(key, keyNum, modifier, event) -- Hotkey handler
    if( event==1 and keyNum==116 and modifier==64  ) then -- Ctrl + t
        -- Additional settings
        local ptype = elements[tpt.selectedl]
        if( ptype == nil  ) then
            ptype = 1 --"DUST"
        end
        -- Prompt
        Texter._Input(
            Texter._InputHandler,
            Texter._Fonts,
            elements.property(ptype, "Name")..", "..Texter._LastInputArgs,
            Texter._LastInputStr,
            Texter._LastInputFont
        )
    end
end
function Texter._InputHandler(params, str, fontName) -- Input handler
    local args = {}
    if( string.len(str) > 0  ) then
        Texter._LastInputStr = str
        str = string.gsub(str, "([^\\]?)\\n", "%1\n")  -- Small trick
        str = string.gsub(str, "([^\\]?)\\\\n", "%1\\n")
    end

    if( string.len(params) > 0  ) then Texter._LastInputArgs = string.gsub(params, "%s*%w*%s*,%s*(.*)", "%1") end
    local i=1
    for arg in string.gmatch(params, "%s*(%w*)%s*,?") do
        args[i] = arg
        i = i+1
    end
    Texter._LastInputFont = fontName

    if( pcall(tpt.element, args[1]) == false  ) then
        args[1] = "DUST"
    end
    Texter.Tstr(str, tpt.mousex, tpt.mousey, args[1], args[2], args[3], fontName)
end

-- APIs
function Texter.LoadAllFontsInFolder(rootPath, foldersToLoad, depth) -- Load all fonts in target folder(s)
    local fonts = Texter._FindAllFile(rootPath, foldersToLoad, depth)
    if(  fonts ~= nil  ) then
        for i=1, #fonts do
            dofile(fonts[i])
        end
    end
    return fonts
end
function Texter.Tchar(char, x, y, ptype, fontName) -- Draw a single character
    local mtx     = {}
    local letter  = {}
    local margin_L = 0 -- margin left
    local margin_R = 0 -- margin right
    local margin_T = 0 -- margin top
    -- if given font not available, use the first available one
    if( fontName == nil or Texter._Fontmatrix[fontName] == nil  ) then
        for font in pairs(Texter._Fontmatrix) do
            fontName = font
            break
        end
    end
    -- if still not available, break
    if( fontName == nil  ) then return 0 end

    -- get character data
    letter = Texter._Fontmatrix[fontName][char]
    if( letter == nil  ) then
        letter = Texter._Fontmatrix[fontName]["nil"]
    end
    if( letter == nil  ) then return 0 end -- ["nil"] not defined
    mtx = letter.Mtx
    if( letter.Margin ~= nil  ) then
        if(letter.Margin.Left  ~= nil)then margin_L = letter.Margin.Left  end
        if(letter.Margin.Right ~= nil)then margin_R = letter.Margin.Right end
        if(letter.Margin.Top   ~= nil)then margin_T = letter.Margin.Top   end
    end

    local width  = 0
    for i=1, #mtx do --mtx height
        if(#mtx[i] > width)then width = #mtx[i] end
        for j=1, width do
            if( mtx[i][j]~=0  ) then --TODO: other ptype support
                pcall(tpt.create, x+j-1+margin_L, y+i-1+margin_T, ptype)
            end
        end
    end
    if(width > 0)then
        width = width + margin_L + margin_R
    end
    return width
end
function Texter.Tstr(str, x, y, ptype, hspacing, vspacing, fontName) -- Draw a string
    local ox    = 0
    local oy    = 0
    local oy    = 0
    local fontH = Texter._GetFontHeight(fontName)
    if( hspacing == nil  ) then
        hspacing = 1
    end
    if( vspacing == nil  ) then
        vspacing = 3
    end
    for i=1,string.len(str) do
        if( string.sub(str, i, i) == "\n"  ) then
            oy = vspacing + oy + fontH
            ox = 0
        else
            ox = hspacing + ox + Texter.Tchar(string.sub(str, i, i), x+ox, y+oy, ptype, fontName)
        end
    end
    return string.len(str)
end
function T(str, ptype, hspc, vspc, fontName) -- Shortcut for better user experience
    if( ptype == nil  ) then
        ptype = elements[tpt.selectedl] -- elements.property(tpt.selectedl, "Name")
    end
    if( str == nil  ) then str = "" end
    if( ptype == nil  ) then
        ptype = "DUST"
    end
    Texter.Tstr(str, tpt.mousex, tpt.mousey, ptype, hspc, vspc, fontName)
    return string.len(str)
end

Texter.Init()