dcs-scratchpad/Scripts/Hooks/scratchpad-hook.lua

function scratchpad_load()
    package.path = package.path .. ";.\\Scripts\\?.lua;.\\Scripts\\UI\\?.lua;"

    local lfs = require("lfs")
    local U = require("me_utilities")
    local Skin = require("Skin")
    local DialogLoader = require("DialogLoader")
    local Tools = require("tools")
    local Input = require("Input")

    local isHidden = true
    local keyboardLocked = false
    local window = nil
    local windowDefaultSkin = nil
    local windowSkinHidden = Skin.windowSkinChatMin()
    local panel = nil
    local textarea = nil

    local scratchpad = {
        logFile = io.open(lfs.writedir() .. [[Logs\Scratchpad.log]], "w")
    }

    function scratchpad.loadConfiguration()
        scratchpad.log("Loading config file...")
        local tbl = Tools.safeDoFile(lfs.writedir() .. "Config/ScratchpadConfig.lua", false)
        if (tbl and tbl.config) then
            scratchpad.log("Configuration exists...")
            scratchpad.config = tbl.config

            -- config migration

            -- add default fontSize config
            if scratchpad.config.fontSize == nil then
                scratchpad.config.fontSize = 14
                scratchpad.saveConfiguration()
            end

            -- move content into text file
            if scratchpad.config.content ~= nil then
                scratchpad.saveContent("0000", scratchpad.config.content, false)
                scratchpad.config.content = nil
                scratchpad.saveConfiguration()
            end
        else
            scratchpad.log("Configuration not found, creating defaults...")
            scratchpad.config = {
                hotkey = "Ctrl+Shift+x",
                windowPosition = {x = 200, y = 200},
                windowSize = {w = 350, h = 150},
                fontSize = 14
            }
            scratchpad.saveConfiguration()
        end
    end

    function scratchpad.getContent(name)
        local path = lfs.writedir() .. [[Scratchpad\]] .. name .. [[.txt]]
        file, err = io.open(path, "r")
        if err then
            scratchpad.log("Error reading file: " .. path)
            return ""
        else
            local content = file:read("*all")
            file:close()
            return content
        end
    end

    function scratchpad.saveContent(name, content, override)
        lfs.mkdir(lfs.writedir() .. [[Scratchpad\]])
        local path = lfs.writedir() .. [[Scratchpad\]] .. name .. [[.txt]]
        local mode = "a"
        if override then
            mode = "w"
        end
        file, err = io.open(path, mode)
        if err then
            scratchpad.log("Error writing file: " .. path)
        else
            file:write(content)
            file:flush()
            file:close()
        end
    end

    function scratchpad.saveConfiguration()
        U.saveInFile(scratchpad.config, "config", lfs.writedir() .. "Config/ScratchpadConfig.lua")
    end

    function scratchpad.log(str)
        if not str then
            return
        end

        if scratchpad.logFile then
            scratchpad.logFile:write("[" .. os.date("%H:%M:%S") .. "] " .. str .. "\r\n")
            scratchpad.logFile:flush()
        end
    end

    local function unlockKeyboardInput(releaseKeyboardKeys)
        if keyboardLocked then
            DCS.unlockKeyboardInput(releaseKeyboardKeys)
            keyboardLocked = false
        end
    end

    local function lockKeyboardInput()
        if keyboardLocked then
            return
        end

        local keyboardEvents = Input.getDeviceKeys(Input.getKeyboardDeviceName())
        DCS.lockKeyboardInput(keyboardEvents)
        keyboardLocked = true
    end

    function scratchpad.createWindow()
        window = DialogLoader.spawnDialogFromFile(lfs.writedir() .. "Scripts\\Scratchpad\\ScratchpadWindow.dlg", cdata)
        windowDefaultSkin = window:getSkin()
        panel = window.Box
        textarea = panel.ScratchpadEditBox

        -- setup textarea
        local skin = textarea:getSkin()
        skin.skinData.states.released[1].text.fontSize = scratchpad.config.fontSize
        textarea:setSkin(skin)

        textarea:setText(scratchpad.getContent("0000"))
        textarea:addChangeCallback(
            function(self)
                scratchpad.saveContent("0000", self:getText(), true)
            end
        )
        textarea:addFocusCallback(
            function(self)
                if self:getFocused() then
                    lockKeyboardInput()
                else
                    unlockKeyboardInput(true)
                end
            end
        )
        textarea:addKeyDownCallback(
            function(self, keyName, unicode)
                if keyName == "escape" then
                    self:setFocused(false)
                    unlockKeyboardInput(true)
                end
            end
        )

        -- setup window
        window:setBounds(
            scratchpad.config.windowPosition.x,
            scratchpad.config.windowPosition.y,
            scratchpad.config.windowSize.w,
            scratchpad.config.windowSize.h
        )
        scratchpad.handleResize(window)

        window:addHotKeyCallback(
            scratchpad.config.hotkey,
            function()
                if isHidden == true then
                    scratchpad.show()
                else
                    scratchpad.hide()
                end
            end
        )
        window:addSizeCallback(scratchpad.handleResize)
        window:addPositionCallback(scratchpad.handleMove)

        window:setVisible(true)
        scratchpad.hide()
        scratchpad.log("Scratchpad Window created")
    end

    function scratchpad.setVisible(b)
        window:setVisible(b)
    end

    function scratchpad.handleResize(self)
        local w, h = self:getSize()

        panel:setBounds(0, 0, w, h - 20)
        textarea:setBounds(0, 0, w, h - 20)

        scratchpad.config.windowSize = {w = w, h = h}
        scratchpad.saveConfiguration()
    end

    function scratchpad.handleMove(self)
        local x, y = self:getPosition()
        scratchpad.config.windowPosition = {x = x, y = y}
        scratchpad.saveConfiguration()
    end

    function scratchpad.show()
        if window == nil then
            local status, err = pcall(scratchpad.createWindow)
            if not status then
                net.log("[Scratchpad] Error creating window: " .. tostring(err))
            end
        end

        window:setVisible(true)
        window:setSkin(windowDefaultSkin)
        panel:setVisible(true)
        window:setHasCursor(true)

        isHidden = false
    end

    function scratchpad.hide()
        window:setSkin(windowSkinHidden)
        panel:setVisible(false)
        textarea:setFocused(false)
        window:setHasCursor(false)
        -- window.setVisible(false) -- if you make the window invisible, its destroyed
        unlockKeyboardInput(true)

        isHidden = true
    end

    function scratchpad.onSimulationFrame()
        if scratchpad.config == nil then
            scratchpad.loadConfiguration()
        end

        if not window then
            scratchpad.log("Creating Scratchpad window hidden...")
            scratchpad.createWindow()
        end
    end

    DCS.setUserCallbacks(scratchpad)

    net.log("[Scratchpad] Loaded ...")
end

local status, err = pcall(scratchpad_load)
if not status then
    net.log("[Scratchpad] Load Error: " .. tostring(err))
end