From 70958c5762081816ad431477737ae7cb385c4132 Mon Sep 17 00:00:00 2001
From: binarycat <binarycat64@protonmail.com>
Date: Sat, 5 Mar 2022 13:46:33 -0500
Subject: [PATCH] add Prompt

---
 code/keybind.lua   | 10 ++++++++
 code/require.lua   |  2 ++
 code/ui.lua        |  1 +
 code/ui/prompt.lua | 63 ++++++++++++++++++++++++++++++++++++++++++++++
 main.lua           | 35 ++++++++++++++++++++++++--
 5 files changed, 109 insertions(+), 2 deletions(-)
 create mode 100644 code/ui/prompt.lua

diff --git a/code/keybind.lua b/code/keybind.lua
index 7458089..083b5d4 100644
--- a/code/keybind.lua
+++ b/code/keybind.lua
@@ -77,6 +77,16 @@ function Keybind:RemoveKeys(action)
 	action.keys = {}
 end
 
+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"}
diff --git a/code/require.lua b/code/require.lua
index aeece38..310f5d9 100644
--- a/code/require.lua
+++ b/code/require.lua
@@ -1,3 +1,5 @@
+
+
 -- data
 require "data/animations"
 require "data/shaders"
diff --git a/code/ui.lua b/code/ui.lua
index 274798f..7cff837 100644
--- a/code/ui.lua
+++ b/code/ui.lua
@@ -7,3 +7,4 @@ end
 
 require "code/ui/button"
 require "code/ui/dialog"
+require "code/ui/prompt"
diff --git a/code/ui/prompt.lua b/code/ui/prompt.lua
new file mode 100644
index 0000000..18eb60d
--- /dev/null
+++ b/code/ui/prompt.lua
@@ -0,0 +1,63 @@
+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",
+	
+	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" then
+		self:func()
+		Prompt.active_prompt = nil
+	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")
+
diff --git a/main.lua b/main.lua
index bac5bc5..be8b2c0 100644
--- a/main.lua
+++ b/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()
@@ -84,16 +96,31 @@ function love.update(dt)
 		end
 		logWrite("Second "..secs..": "..memoryUsage.." kB")
 	end
+	
+	if Prompt.active_prompt then
+		Prompt.active_prompt:update()
+		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
@@ -133,6 +160,10 @@ function love.draw()
 	love.graphics.print(game.scale,10,40)
 
 	if DemoRecording or DemoPlayback then Demo:draw() end
+	
+	if Prompt.active_prompt then
+		Prompt.active_prompt:draw()
+	end
 
 	frameDebugFlush()
 end