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a lot of changes in modules
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227
modules/client_terminal/terminal.lua
Normal file
227
modules/client_terminal/terminal.lua
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Terminal = { }
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-- configs
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local LogColors = { [LogInfo] = 'white',
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[LogWarning] = 'yellow',
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[LogError] = 'red' }
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local MaxLogLines = 80
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local LabelHeight = 16
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local MaxHistory = 1000
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-- private variables
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local terminalWidget
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local terminalButton
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local logLocked = false
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local commandEnv = newenv()
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local commandLineEdit
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local terminalBuffer
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local commandHistory = { }
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local currentHistoryIndex = 0
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-- private functions
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local function navigateCommand(step)
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local numCommands = #commandHistory
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if numCommands > 0 then
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currentHistoryIndex = math.min(math.max(currentHistoryIndex + step, 0), numCommands)
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if currentHistoryIndex > 0 then
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local command = commandHistory[numCommands - currentHistoryIndex + 1]
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commandLineEdit:setText(command)
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else
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commandLineEdit:clearText()
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end
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end
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end
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local function completeCommand()
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local cursorPos = commandLineEdit:getCursorPos()
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if cursorPos == 0 then return end
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local commandBegin = commandLineEdit:getText():sub(1, cursorPos)
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local possibleCommands = {}
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-- create a list containing all globals
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local allVars = table.copy(_G)
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table.merge(allVars, commandEnv)
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-- match commands
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for k,v in pairs(allVars) do
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if k:sub(1, cursorPos) == commandBegin then
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table.insert(possibleCommands, k)
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end
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end
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-- complete command with one match
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if #possibleCommands == 1 then
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commandLineEdit:setText(possibleCommands[1])
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-- show command matches
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elseif #possibleCommands > 0 then
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print('>> ' .. commandBegin)
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-- expand command
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local expandedComplete = commandBegin
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local done = false
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while not done do
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cursorPos = #commandBegin+1
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if #possibleCommands[1] < cursorPos then
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break
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end
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expandedComplete = commandBegin .. possibleCommands[1]:sub(cursorPos, cursorPos)
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for i,v in ipairs(possibleCommands) do
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if v:sub(1, #expandedComplete) ~= expandedComplete then
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done = true
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end
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end
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if not done then
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commandBegin = expandedComplete
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end
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end
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commandLineEdit:setText(commandBegin)
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for i,v in ipairs(possibleCommands) do
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print(v)
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end
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end
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end
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local function doCommand()
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local currentCommand = commandLineEdit:getText()
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Terminal.executeCommand(currentCommand)
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if commandLineEdit then
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commandLineEdit:clearText()
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end
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return true
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end
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local function onLog(level, message, time)
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-- debug messages are ignored
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if level == LogDebug then return end
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-- avoid logging while reporting logs (would cause a infinite loop)
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if logLocked then return end
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logLocked = true
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Terminal.addLine(message, LogColors[level])
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logLocked = false
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end
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-- public functions
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function Terminal.init()
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terminalWidget = displayUI('terminal.otui')
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terminalWidget:setVisible(false)
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terminalButton = TopMenu.addButton('terminalButton', 'Terminal (Ctrl + T)', 'terminal.png', Terminal.toggle)
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Keyboard.bindKeyDown('Ctrl+T', Terminal.toggle)
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commandHistory = Settings.getList('terminal-history')
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commandLineEdit = terminalWidget:getChildById('commandLineEdit')
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Keyboard.bindKeyDown('Up', function() navigateCommand(1) end, commandLineEdit)
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Keyboard.bindKeyDown('Down', function() navigateCommand(-1) end, commandLineEdit)
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Keyboard.bindKeyDown('Tab', completeCommand, commandLineEdit)
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Keyboard.bindKeyDown('Enter', doCommand, commandLineEdit)
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terminalBuffer = terminalWidget:getChildById('terminalBuffer')
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Logger.setOnLog(onLog)
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Logger.fireOldMessages()
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end
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function Terminal.terminate()
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Settings.setList('terminal-history', commandHistory)
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Keyboard.unbindKeyDown('Ctrl+T')
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Logger.setOnLog(nil)
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terminalButton:destroy()
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terminalButton = nil
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commandLineEdit = nil
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terminalBuffer = nil
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terminalWidget:destroy()
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terminalWidget = nil
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commandEnv = nil
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end
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function Terminal.toggle()
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if terminalWidget:isVisible() then
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Terminal.hide()
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else
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Terminal.show()
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end
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end
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function Terminal.show()
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terminalWidget:show()
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terminalWidget:lock()
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end
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function Terminal.hide()
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terminalWidget:unlock()
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terminalWidget:hide()
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end
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function Terminal.addLine(text, color)
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-- create new line label
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local numLines = terminalBuffer:getChildCount() + 1
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local label = createWidget('TerminalLabel', terminalBuffer)
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label:setId('terminalLabel' .. numLines)
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label:setText(text)
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label:setColor(color)
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-- delete old lines if needed
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if numLines > MaxLogLines then
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terminalBuffer:getChildByIndex(1):destroy()
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else
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terminalBuffer:setHeight(terminalBuffer:getHeight() + LabelHeight)
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end
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end
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function Terminal.executeCommand(command)
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if command == nil or #command == 0 then return end
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logLocked = true
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Logger.log(LogInfo, '>> ' .. command)
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logLocked = false
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-- detect and convert commands with simple syntax
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local realCommand
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if commandEnv[command] then
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if type(commandEnv[command]) == "function" then
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realCommand = command .. '()'
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else
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realCommand = 'print(' .. command .. ')'
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end
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else
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realCommand = command
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end
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-- reset current history index
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currentHistoryIndex = 0
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-- add new command to history
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table.insert(commandHistory, command)
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if #commandHistory > MaxHistory then
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table.remove(commandHistory, 1)
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end
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-- add command line
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Terminal.addLine(">> " .. command, "#ffffff")
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-- load command buffer
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local func, err = loadstring(realCommand, "@")
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-- check for syntax errors
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if not func then
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Logger.log(LogError, 'incorrect lua syntax: ' .. err:sub(5))
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return
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end
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-- setup func env to commandEnv
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setfenv(func, commandEnv)
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-- execute the command
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local ok, ret = pcall(func)
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if ok then
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-- if the command returned a value, print it
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if ret then print(ret) end
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else
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Logger.log(LogError, 'command failed: ' .. ret)
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end
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end
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