improve Prompt and use it to ask for level and file name when exporting

code/editor.lua

@@ -65,7 +65,21 @@ function stepEditor()
 	end
 
 	if Keybind:CheckPressed(Keybind.debug.reload) then
-		ExportLevel("test")
+		Prompt:new({
+			name = "level name",
+			input = "unnamed",
+			func = function(name_prompt)
+				if name_prompt.canceled then return end
+				Prompt:new({
+					name = "filename",
+					input = "level.lua",
+					func = function(file_prompt)
+						if file_prompt.canceled then return end
+						ExportLevel(name_prompt.input, file_prompt.input)
+					end,
+				}):activate()
+			end,
+		}):activate()
 	end
 
 	if Keybind:CheckPressed(Keybind.debug.editor) then

code/in_out.lua

@@ -1,7 +1,9 @@
 function ExportLevel(levelname, filename)
-	os.execute( "mkdir \"./export\"" )
+	love.filesystem.createDirectory("export")
 	filename = filename or "output.lua"
-	filename = "export/"..filename
+	if string.sub(filename, 1, 1) ~= "/" then
+		filename = "export/"..filename
+	end
 	exportFile = io.open(filename, "w+")
 
 	if exportFile then

code/keybind.lua

@@ -44,6 +44,7 @@ function Keybind:CheckDown(action)
 	end
 end
 
+-- relies on being called exactly once per frame to be accurate.
 function Keybind:CheckPressed(action)
 	if Keybind:CheckDown(action) then
 		if not action.pressed then
@@ -77,6 +78,17 @@ function Keybind:RemoveKeys(action)
 	action.keys = {}
 end
 
+-- this prolly should be used by Prompt:keypressed()
+function Keybind:hasKey(action, key)
+	for _, v in pairs(action.keys) do
+		if v == key then
+			return true
+		end
+	end
+
+	return false
+end
+
 function Keybind:Default()
 	--Menu
 	Keybind.menu.pause.keys = {"escape"}

code/require.lua

@@ -1,3 +1,5 @@
+
+
 -- data
 require "data/animations"
 require "data/shaders"

code/ui.lua

@@ -7,3 +7,4 @@ end
 
 require "code/ui/button"
 require "code/ui/dialog"
+require "code/ui/prompt"

code/ui/prompt.lua

@@ -0,0 +1,68 @@
+local utf8 = require("utf8")
+
+local function backspace(text)
+	local byteoffset = utf8.offset(text, -1)
+
+	if byteoffset then
+			-- remove the last UTF-8 character.
+			-- string.sub operates on bytes rather than UTF-8 characters,
+			-- so we couldn't do string.sub(text, 1, -2).
+			return string.sub(text, 1, byteoffset - 1)
+	end
+	
+	return ""
+end
+
+Prompt = {
+	-- defaults for instance variables
+	pos = { x = 10, y = 10 },
+	input = "",
+	name = "input",
+	canceled = false,
+	closing = false,
+	
+	active_prompt = nil,
+}
+
+function Prompt:new(o)
+	o = o or {}
+	setmetatable(o, self)
+	self.__index = self
+	return o
+end
+
+function Prompt:keypressed(key, scancode, isrepeat)
+	if key == "backspace" then
+		self.input = backspace(self.input)
+	elseif key == "return" or key == "kpenter" or key == "escape" then
+		if key == "escape" then
+			self.canceled = true
+		end
+		self.closing = true
+		self:func()
+	end
+end
+
+function Prompt:update()
+	
+end
+
+function Prompt:textinput(text)
+	self.input = self.input .. text
+end
+
+function Prompt:draw()
+	love.graphics.print(self.name .. ": " .. self.input, self.pos.x, self.pos.y)
+end
+
+function Prompt:activate()
+	Prompt.active_prompt = self
+	love.keyboard.setTextInput(true)
+end
+
+-- demonstration of how default values work
+local test_prompt = Prompt:new()
+assert(test_prompt.name == "input")
+test_prompt.name = "foobar"
+assert(Prompt.name == "input")
+

main.lua

@@ -62,6 +62,18 @@ function love.load()
 	--love.audio.play(music.placeholder)
 end
 
+function love.textinput(text)
+	if Prompt.active_prompt then
+		Prompt.active_prompt:textinput(text)
+	end
+end
+
+function love.keypressed(...)
+	if Prompt.active_prompt then
+		Prompt.active_prompt:keypressed(...)
+	end
+end
+
 function love.update(dt)
 	-- audio update
 	love.audio.update()
@@ -85,15 +97,36 @@ function love.update(dt)
 		logWrite("Second "..secs..": "..memoryUsage.." kB")
 	end
 	
+	if Prompt.active_prompt then
+		-- try to stop the keypress that closed the menu from spilling into the rest of the game
+		Keybind:CheckPressed(Keybind.menu.pause)
+		if Prompt.active_prompt.closing then
+			Prompt.active_prompt = nil
+		else
+			Prompt.active_prompt:update()
+		end
+		return
+	end
+	
+	if love.keyboard.isDown("f7") then
+		local test_prompt = Prompt:new({
+			name = "test prompt",
+			func = function(prompt)
+				print("test prompt got input: "..prompt.input)
+			end,
+		})
+		test_prompt:activate()
+	end
+
 	--keypressed
 	if Keybind:CheckPressed(Keybind.menu.pause) then
-    if do_pause then
+		if do_pause then
 			do_pause = false
 		else
 			menu_type = "pause"
 			MenuInit(menu_type)
 		end
-  end
+	end
 
 	--MenuStep
 	if menu_type ~= nil then MenuStep(menu_type) end
@@ -134,5 +167,9 @@ function love.draw()
 
 	if DemoRecording or DemoPlayback then Demo:draw() end
 	
+	if Prompt.active_prompt then
+		Prompt.active_prompt:draw()
+	end
+
 	frameDebugFlush()
 end