ALL lua console for Powder Toy

--[[  This program is free software. It comes without any warranty, to
 the extent permitted by applicable law. You can redistribute it
 and/or modify it under the terms of the Do What The Fuck You Want
 To Public License, Version 2, as published by Sam Hocevar. See
 http://sam.zoy.org/wtfpl/COPYING for more details. --]]

-- The ALL lua-console v4
--   by devast8a

console = {
    -- Current state of console
    -- 0 = Closed
    -- 1 = Opened
    -- 2 = Old console opened
    -- [READONLY]
    active = 0,

    -- Debug state of console, 1 if active, 0 if not
    -- In no way effected by tpt.setdebug
    -- [READONLY]
    debugmode = 0,

    -- Current command line text for console
    currentCommand = "",

    buffer = {},    -- Handle writing output to a larger display than screen can show
    colors = {},    -- store console colors & resolve text colors to RGB
    history = {},   -- command history
    keys = {},      -- handle key input
    old = {},       -- support for old console
    quick = {},     -- Quick commands (commands that being with !)
    screen = {},    -- Handle drawing to the screen
}

------------------------------------------------
-- GLOBAL API ----------------------------------
------------------------------------------------
function print(message)
    console.writeln(message)
    --console.screen.buffer = console.screen.buffer .. "\n" .. message
end

function error(message)
    console.writeln(message, "error", "errorbg")
end

-- Call cmd & automatically call error (w/ error message) upon error
function ecall(cmd, ...)
    _, result = pcall(cmd, unpack(arg))

    if _ == false then
        error(result)
    end

    return _, result
end

-- Execute a commnad
function runcommand(command)
    -- Handle quick commands
    if string.sub(command, 1, 1) == "!" then
        local l = string.find(command, " ")

        if l == nil then
            command = string.sub(command, 2)
            args = ""
        else
            args = string.trim(string.sub(command, l))
            command = string.sub(command, 2, l - 1)
        end

        cmd = console.quick[command]
        message = "No command by the name of '" .. command .. "' exists"

    -- Short hand for return
    elseif string.sub(command, 1, 1) == "@" then
        command = "return " .. string.sub(command, 2)
        cmd, message = loadstring(command)

    -- Compile the string to a function
    else
        cmd, message = loadstring(command)
    end

    -- Handle errors
    if cmd == nil then
        error(message)
    else
        if args == nil then
            _, result = pcall(cmd)
        else
            _, result = pcall(cmd, args)
        end

        print(result)
    end
end

------------------------------------------------
-- string --------------------------------------
------------------------------------------------
string.trim = function (str)
    return (string.gsub(str, "^%s*(.-)%s*$", "%1"))
end

string.split = function (str, split)
    local output = {}

    lastpos = 1
    while true do
        pos = string.find(str, split, lastpos)
        if pos == nil then
            table.insert(output, string.sub(str, lastpos))
            return output
        end

        table.insert(output, string.sub(str, lastpos, pos-1))
        lastpos = pos + 1
    end

    return { str }
end

------------------------------------------------
-- console -------------------------------------
------------------------------------------------
console.set = function(value)
    if console.active == 2 then
        if value == 0 then
            console.active = 0
        else
            console.active = 2
        end

        return console.old.set_console(value)
    end

    if value == 0 then
        console.active = 0
        tpt.hud(1)
    else
        console.old.set_pause(1)
        tpt.hud(0)
        console.active = 1
    end
end

console.toggle = function()
    console.set(1-console.active)
end

------------------------------------------------
-- console.old ---------------------------------
------------------------------------------------
console.old = {
    active = 0,
    hud_value = 1,
}

console.old.open = function()
    -- Old console quirks
    tpt.hud(1)

    -- Open the old console
    console.active = 2
    console.old.set_console(1)
end

------------------------------------------------
-- console.old.interop -------------------------
------------------------------------------------
console.old.interop = {}

-- tpt.set_pause
console.old.interop.set_pause = function(value)
    if console.active == 0 then
        console.old.set_pause(value)
    end
end
console.old.set_pause = tpt.set_pause
tpt.set_pause = console.old.interop.set_pause

-- tpt.log
console.old.interop.log = function(message)
    if console.active == 2 then
        return console.old.log(message)
    end

    return print(message)
end
console.old.log = tpt.log
tpt.log = console.old.interop.log

-- tpt.hud
console.old.interop.hud = function(value)
    if value == 0 then
        console.old.hud_value = 0
    else
        console.old.hud_value = 1
    end

    console.old.hud(value)
end
console.old.hud = tpt.hud
tpt.hud = console.old.interop.hud

-- tpt.set_console
console.old.set_console = tpt.set_console
tpt.set_console = console.set

------------------------------------------------
-- console.buffer ------------------------------
------------------------------------------------
console.buffer = {
    x = 1,
    y = 1,
    newline = 0,
    width = 85,
    height = 500,
    lines = {},

    more = {
        enabled = false,
    }
}

console.buffer.draw = function(self, screen, xoffset, yoffset)
    fontx = 7
    fonty = 9

    y = 0
    for i = screen.y+(1+self.y-screen.height), screen.y+self.y do
        if i < 1 then
            line = self.lines[self.height + i]
        else
            if i > self.height then
                line = self.lines[i-self.height]
            else
                line = self.lines[i]
            end
        end

        if line ~= nil then
            x = 0
            for ch = screen.x + 1, screen.x+screen.width do
                char = line[ch]

                if char == 0 then
                    break
                end

                if char ~= nil then
                    fg = console.colors.get(char[2], console.colors.foreground)
                    bg = console.colors.get(char[3], console.colors.background)

                    if bg ~= 0 then
                        if x == 0 then
                            tpt.fillrect(xoffset + x * fontx - 3, yoffset + y * fonty - 2, fontx + 3, fonty + 1, bg[1], bg[2], bg[3], bg[4])
                        else
                            tpt.fillrect(xoffset + x * fontx - 1, yoffset + y * fonty - 2, fontx + 1, fonty + 1, bg[1], bg[2], bg[3], bg[4])
                        end
                    end

                    tpt.drawtext(xoffset + x * fontx, yoffset + y * fonty, char[1], fg[1], fg[2], fg[3], fg[4])
                end

                x = x + 1
            end
        end

        y = y + 1
    end
end

console.buffer._write = function(char)
    self = console.buffer

    if self.newline == true then
        self.y = self.y + 1
        self.newline = false
    end

    if char == "\n" then
        self.newline = true
        self.x = 1
    elseif char == "\r" then
        self.x = 1
    else
        line = self.lines[self.y]

        if line == nil then line = {} self.lines[self.y] = line end

        line[self.x] = {char, self.cf, self.cb}

        self.x = self.x + 1
        if self.x > self.width then
            self.y = self.y + 1
            self.x = 1
            self.lines[self.y] = {}
        end
    end

    if self.y > self.height then
        self.y = 1
    end
end

console.buffer.write = function(text, colorF, colorB)
    if text == nil then
        return
    end

    self = console.buffer

    tpt.drawtext(0, 0, "test")

    self.cf = colorF
    self.cb = colorB

    string.gsub(text, ".", console.buffer._write)
end

console.write = console.buffer.write

console.buffer.writeln = function(text, colorF, colorB)
    if text == nil then
        return
    end

    console.buffer.write(text .. "\n", colorF, colorB)
end
console.writeln = console.buffer.writeln

------------------------------------------------
-- console.screen ------------------------------
------------------------------------------------
console.screen = {
    x = 0,
    y = 0,
    height = 40,
    width  = 85,
}

console.screen.right = function(self)
    self.x = self.x + 1
    if self.x > console.buffer.width - self.width then
        self.x = 0
    end
end

console.screen.left = function(self)
    self.x = self.x - 1
    if self.x < 0 then
        self.x = 0
    end
end

console.screen.down = function(self)
    self.y = self.y + 1
    if self.y > console.buffer.height - 1 then
        self.y = 0
    end
end

console.screen.up = function(self)
    self.y = self.y - 1
    if self.y < 0 then
        self.y = console.buffer.height - 1
    end
end

console.screen.draw = function(self)
    cbk = console.colors.backdrop
    cbr = console.colors.border
    cln = console.colors.line

    tpt.fillrect(5,   5, 600, 570, cbk[1], cbk[2], cbk[3], cbk[4])
    tpt.drawline(5, 372, 605, 372, cln[1], cln[2], cln[3], cln[4])
    tpt.drawrect(5,   5, 600, 570, cbr[1], cbr[2], cbr[3], cbr[4])


    if console.currentCommand == nil then
        tpt.drawtext(8, 375, "> FATAL ERROR - currentCommand = <nil>", 255, 0, 0)
    else
        c = console.colors.command

        tpt.drawtext(8, 375, "> " .. console.currentCommand, c[1], c[2], c[3], c[4])
    end

    ecall(console.buffer.draw, console.buffer, console.screen, 8, 10)

    tpt.drawtext(0, 0, error_message)
end

------------------------------------------------
-- console.colors ------------------------------
------------------------------------------------
console.colors = {
    blue        = {  0,   0, 255, 255},
    cyan        = {  0, 255, 255, 255},
    darkblue    = {  0,   0, 178, 255},
    darkcyan    = {  0, 178, 178, 255},
    darkgreen   = {  0, 178,   0, 255},
    darkred     = {178,   0,   0, 255},
    darkyellow  = {178, 178,   0, 255},
    darkpurple  = {178,   0, 178, 255},
    default     = {178,  32, 255, 255},
    gray        = {178, 178, 178, 255},
    green       = {  0, 255,   0, 255},
    purple      = {255,   0, 255, 255},
    red         = {255,   0,   0, 255},
    white       = {255, 255, 255, 255},
    yellow      = {255, 255,   0, 255},
}

-- bound colors
console.colors.command    = console.colors.default -- color for current command
console.colors.foreground = console.colors.default -- default foreground color
console.colors.background = 0                      -- background of nil won't draw anything
console.colors.error      = console.colors.red     -- default foreground for errors
console.colors.errorbg    = 0                      -- default background for errors
console.colors.backdrop   = {0,0,0,178}            -- backdrop, the color behind the text
console.colors.border     = console.colors.white   -- border to the console
console.colors.line       = console.colors.white   -- line which seperates console output from input
console.colors.hud_motd   = console.colors.default -- message of the day display
console.colors.hud_debug  = console.colors.default -- debug display
console.colors.hud_close  = console.colors.default -- close message when old console is opened

console.colors.get = function(color, default)
    if color == nil then
        return default
    end

    if type(color) == "table" then
        if #color == 3 then
            table.insert(color, 255)
        elseif #color ~= 4 then
            error("Color must be a table of 3 or 4 numbers")
            return default
        end

        return color
    end

    c = console.colors[color]

    if c == nil then
        error("Unknown color '" .. color .. "'")
        return default
    end

    return c
end

------------------------------------------------
-- console.keys --------------------------------
------------------------------------------------
console.keys = {
    binds = {},
    numbers = {},
    symbols = {},
    lastkey = 0,
    down = 0,
    downstart = 0,
    repeatDelay = 0.5,
    repeatTimer = 0.05
}

console.keys.clear = function(self)
    self.binds = {}
    self.numbers = {}
    self.symbols = {}
end

console.keys.default = function(self)
    self:clear()
    -- Shifted Numbers Map
    self.numbers = {")", "!", "@", "#", "$", "%", "^", "&", "*", "("}
    -- Shifted Symbols Map
    self.symbols["-"] = "_"
    self.symbols["="] = "+"
    self.symbols["["] = "{"
    self.symbols["]"] = "}"
    self.symbols[";"] = ":"
    self.symbols["'"] = "\""
    self.symbols[","] = "<"
    self.symbols["."] = ">"
    self.symbols["/"] = "?"
    self.symbols["\\"] = "|"
    -- Set binds
    self.binds[27] = function() console.set(0) end          -- Esc
    self.binds[96] = function() console.set(0) end          -- ` - Console Key
    self.binds[273] = function() console.history:next() end -- Up
    self.binds[274] = function() console.history:prev() end -- Down
    self.binds[278] = function() console.screen:left() end  -- Home
    self.binds[279] = function() console.screen:right() end -- End
    self.binds[280] = function() console.screen:up() end    -- Page Up
    self.binds[281] = function() console.screen:down() end  -- Page Down
end

-- default keys should work for US style keyboards
console.keys.us = console.keys.default

-- Repeat the key if held down for longer than 0.5 seconds
console.keys.heldkey = function(self)
    if self.down == 1 then
        if os.clock() - self.downstart > self.repeatDelay then
            self.down = 2
        end
    end
    if self.down == 2 and (os.clock() - self.downstart) > self.repeatTimer then
        downstart = os.clock()
        console.keys:process(self.lastks, self.lastkey, self.lastmod, 3)

        -- HACK: down is set within console.keys.process, set it back to 2
        self.down = 2
    end
end

console.keys.process = function(self, keyString, key, modifier, event)
    self.lastkey = key
    self.lastks = keyString
    self.lastmod = modifier

    self.down = 2 - event
    self.downstart = os.clock()

    -- Handle keys closing old console
    if console.active == 2 and (key == 96 or key == 27) then
        console.active = 0
    end

    -- Override keys
    if console.active == 0 and event == 1 then
        -- ` - Console Key
        if key == 96 then
            if console.active == 0 and (modifier == 1 or modifier == 2) then
                console.old.open()
                return false
            end

            console.toggle()
            return false
        end

        -- d - Debug Mode
        if key == 100 and event == 1 then
            console.debugmode = 1 - console.debugmode
        end

        -- h - Hud Toggle
        if key == 104 and event == 1 then
            tpt.hud(1 - console.old.hud_value)
            return false
        end
    end

    if console.active == 1 then
        if event == 2 then
            return false
        end

        -- Handle backspace
        if key == 8 then
            console.currentCommand = string.sub(console.currentCommand, 1, string.len(console.currentCommand)-1)
            return false
        end

        -- Process console.currentCommand
        if key == 13 then
            console.history:store(console.currentCommand)
            local temp = console.currentCommand
            console.currentCommand = ""
            runcommand(temp)
            return false
        end

        -- Execute bind for key
        bind = self.binds[key]
        if bind ~= nil then
            ecall(bind, keyString, key, modifier, event)
            return false
        end

        -- Ignore any special keys
        if key >= 256 then
            return false
        end

        -- Mappings for shifted keys
        if modifier == 1 or modifier == 2 then
            if key >= 48 and key <= 57 then
                keyString = self.numbers[key - 47]
            elseif key >= 97 and key <= 122 then
                keyString = string.char(key - 97 + 65)
            else
                local temp = self.symbols[keyString]

                if temp ~= nil then
                    keyString = temp
                end
            end
        end

        console.currentCommand = console.currentCommand .. keyString
        return false
    end
end

------------------------------------------------
-- console.history -----------------------------
------------------------------------------------
console.history = {
    contents = {},
    maxsize = 30,
    size = 0,
}

console.history.store = function(self, value)
    self.size = self.size + 1
    table.insert(self.contents, 1, value)
    self.selected = 0
end

console.history.next = function(self)
    if self.size == 0 then
        return
    end
    self.selected = self.selected + 1

    if self.selected > self.size then
        self.selected = 1
    end

    console.currentCommand = self.contents[self.selected]
end

console.history.prev = function(self)
    if self.size == 0 then
        return
    end
    self.selected = self.selected - 1

    if self.selected <= 0 then
        self.selected = self.size
    end

    console.currentCommand = self.contents[self.selected]
end

console.history.select = function(self, n)
    if self.size == 0 then
        return
    end

    n = n%self.size
    print(n)
    self.selected = (self.selected + n)

    print(self.selected)
    console.currentCommand = self.contents[self.selected]
end

------------------------------------------------
-- console.quick -------------------------------
------------------------------------------------
local function console_quick_help()
    print("!color [name] <color>")
    print("!e <text>  - Echo text")
    print("!r <file>  - Run a file")
    print("!help      - Display this")
end

console.quick[""] = console_quick_help
console.quick["help"] = console_quick_help

console.quick["e"] = function(arguments)
    console.buffer.write(arguments)
end

console.quick["color"] = function(arguments)
    args = string.split(arguments, " ")

    if #args == 1 then
        name = "foreground"
        color = args[1]
    elseif #args == 2 then
        name = args[1]
        color = args[2]
    else
        error("!color [name] <color>")
        return
    end

    c = string.split(color,",")

    if #c == 1 then
        if color == "nil" then
            console.colors[name] = 0
            return
        end

        c = console.colors.get(color)

        if c == nil then
            return
        end
    elseif #c == 3 or #c == 4 then
        alpha = 255

        if #c == 4 then
            alpha = tonumber(c[4])
        end

        c = {
            tonumber(c[1]),
            tonumber(c[2]),
            tonumber(c[3]),
            alpha
        }
    end

    console.colors[name] = c
end

-- Function for running a file named filename or filename.lua
console.quick["r"] = function(filename)
    if string.sub(filename, -4) ~= ".lua" then
        f, msg = io.open(filename, "r")

        if not f then
            f, msg = io.open(filename .. ".lua", "r")
            if f then
                f:close()
                return dofile(filename .. ".lua")
            end
        else
            f:close()
        end
    end
    return dofile(filename)
end

------------------------------------------------
-- LETS DO THIS! -------------------------------
------------------------------------------------
local function keyHandler(keyString, key, modifier, event)
    return console.keys:process(keyString, key, modifier, event)
end

motd = 1
motdstart = 0

local function mouseHandler(mousex, mousey, button, event)
    if motd == 1 then
        motdstart = os.clock()
        motd = 0
    end

    if console.active == 1 then
        return false
    end

    return true
end

local function draw()
    if console.active == 1 then
        ecall(console.keys.heldkey, console.keys)
        console.screen:draw()
    end

    if motd == 1 then
        alpha = 1
    else
        alpha = 1 - (os.clock() - motdstart)
    end

    if alpha ~= 0 then
        c = console.colors.hud_motd
        tpt.drawtext(17, 335, "The all lua-console V5 by devast8a is installed!", c[1], c[2], c[3], c[4] * alpha)
    end

    if console.debugmode == 1 then
        x = 16
        y = 27

        c = console.colors.hud_debug
        if console.old.hud_value == 1 then
            tpt.drawtext(16, 27, "lua-console (V5) (" .. console.active .. ", " .. console.keys.lastkey .. ")", c[1], c[2], c[3], c[4])
        end
        if console.active == 1 then
            tpt.drawtext(575, 8, "[" .. console.keys.lastkey .. "]", c[1], c[2], c[3], c[4])
        end
    end

    if console.active == 2 then
        c = console.colors.hud_close
        tpt.drawtext(5, 228, "Old console [Press escape to close] -- lua-console", c[1], c[2], c[3], c[4])
    end
end

tpt.register_step(draw)
tpt.register_keypress(keyHandler)
tpt.register_mouseclick(mouseHandler)

console.old.log("lua-console loaded successfully")

tpt.log("The all lua-console V5")
tpt.log("  by devast8a")
tpt.log("")
tpt.log("Page Up/Down - move console screen up/down")
-- Home/End - move console left/right (Only useful when buffer is larger than screen)
tpt.log("Up/Down - cycle through command history")
tpt.log("")
tpt.log("Commands starting with ! don't work, instead close this console")
tpt.log(" and press shift + console key to use the old console.")

------------------------------------------------
-- Last initialization steps -------------------
------------------------------------------------
console.keys:us() -- keyboard mapping