Minimal text gui is now possible

Makefile

@@ -22,3 +22,6 @@ run :
 
 clean :
 	rm -rf $(BUILDDIR)/*
+
+kill:
+	kill -s kill $(ps | grep "love src/" | awk '{print $1}')

src/main.lua

@@ -11,7 +11,9 @@ local ui = require "ui"
 
 local characters = {}
 
-function love.load()
+function love.load(arg)
+  if arg[#arg] == "-debug" then require("mobdebug").start() end -- debugging in ZeroBraineStudio
+  
   windowWidth = love.graphics.getWidth()
   windowHeight = love.graphics.getHeight()
 
@@ -19,19 +21,28 @@ function love.load()
   collision = map:getCollisionMap("collision")
 
   initCharacters()
+  ui:showMessage("Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?")
 end
 
 function love.update(dt)
-  for _, char in ipairs(characters) do
-    char.controller.animation:update(dt)
+  if not ui.active then
+    for _, char in ipairs(characters) do
+      char.controller.animation:update(dt)
 
-    if char.relevantKeys then
-      for _, relevantKey in ipairs(char.relevantKeys) do
-        if love.keyboard.isDown(relevantKey) then
-          char.controller:sendKey(relevantKey)
+      if char.relevantKeys then
+        for _, relevantKey in ipairs(char.relevantKeys) do
+          if love.keyboard.isDown(relevantKey) then
+            char.controller:sendKey(relevantKey)
+          end
         end
       end
     end
+  else
+    for _, relevantKey in ipairs(ui.relevantKeys) do
+      if love.keyboard.isDown(relevantKey) then
+        ui:sendKey(relevantKey)
+      end
+    end
   end
 
   collider:update(dt)
@@ -48,10 +59,6 @@ function love.keyreleased(key)
       end
     end
   end
-
-   if key == "w" then
-      print()
-   end
 end
 
 function love.draw()
@@ -63,6 +70,7 @@ function love.draw()
   map:setDrawRange(translateX, translateY, windowWidth, windowHeight)
 
   map:draw()
+  ui:draw()
 
   --debugDrawing()
 end
@@ -78,8 +86,6 @@ function debugDrawing()
 end
 
 function initCharacters()
-  local collisionBoxOffset = 5
-
   map:addCustomLayer("character layer", 4)
 
   local characterLayer = map.layers["character layer"]
@@ -114,5 +120,3 @@ function initCharacters()
 
   map.layers["characters"].visible = false
 end
-
-

src/ui.lua

@@ -1,4 +1,114 @@
 local ui = {}
 
+ui.relevantKeys = { "return", "up", "down" }
+
+ui.height = 240
+ui.fullMessage = ""
+ui.active = false
+
+ui.border = 10
+
+ui.textLines = {}
+ui.startLine = 1
+ui.endLine = 1
+
+local font = love.graphics.newFont("assets/ui/font.ttf", 24)
+love.graphics.setFont(font)
+
+function ui:showMessage(message)
+  ui.active = true
+
+  local maxLines = math.floor((ui.height - ui.border) / font:getHeight())
+  local fullLines = font:getWrap(ui.fullMessage, windowWidth - ui.border)
+  
+  ui.textLines = {}
+  
+  local fullIndex = 1
+  local messageTail = message
+  
+  while not endsWith(messageTail, ui.textLines[#ui.textLines]) do
+    fullIndex, line, messageTail = ui:getMaxString(string.sub(messageTail, fullIndex))
+    fullIndex = fullIndex + 1 -- account for the following space
+
+    table.insert(ui.textLines, line)
+  end
+
+  ui.endLine = maxLines
+  
+  ui:setLineRange(ui.startLine, ui.endLine)
+end
+
+function ui:setLineRange(startLine, endLine)
+  ui.fullMessage = ""
+  
+  if endLine > #ui.textLines then endLine = #ui.textLines end
+
+  for index = startLine, endLine, 1 do
+    ui.fullMessage = ui.fullMessage .. ui.textLines[index]
+  end
+end
+
+function endsWith(s, send)
+  if not send then return false end
+  return #s >= #send and s:find(send, #s-#send+1, true) and true or false
+end
+
+function ui:getMaxString(stringTail)
+  local index = string.len(stringTail)
+  local width = font:getWidth(string.sub(stringTail, 1, index))
+
+  local needsCutting = width > windowWidth - ui.border
+  
+  while width > windowWidth - ui.border do
+    width = font:getWidth(string.sub(stringTail, 1, index))
+    index = index - 1
+  end
+
+  if needsCutting and 
+     string.sub(stringTail, index + 1, index + 1) ~= " " then
+    local cursor = "!"
+    while cursor ~= " " and cursor ~= "" do
+      index = index - 1
+      cursor = string.sub(stringTail, index, index)
+    end
+  end
+
+  return index, string.sub(stringTail, 1, index), stringTail
+end
+
+function ui:draw()
+  if ui.active then
+    love.graphics.setColor(255, 255, 255, 150)
+    love.graphics.rectangle("fill", 0, windowHeight - ui.height, windowWidth, ui.height)
+
+    love.graphics.setColor(55, 60, 60, 255)
+    love.graphics.printf(ui.fullMessage, ui.border, windowHeight - ui.height + ui.border, windowWidth - ui.border)
+  end
+end
+
+function ui:sendKey(key)
+  if key == "up" then
+    if ui.startLine > 1 then
+      ui.startLine = ui.startLine - 1
+      ui.endLine = ui.endLine - 1
+      
+      ui:setLineRange(ui.startLine, ui.endLine)
+    end
+  end
+  
+  if key == "down" then
+    if ui.endLine < #ui.textLines then
+      ui.startLine = ui.startLine + 1
+      ui.endLine = ui.endLine + 1
+      
+      ui:setLineRange(ui.startLine, ui.endLine)
+    end
+  end
+  
+  if key == "return" then
+    ui.active = false
+    print(ui.active)
+  end
+end
 
 return ui