pothi.love/main.lua

utf8 = require 'utf8'
json = require 'json'

require 'app'
require 'test'
require 'live'

require 'keychord'
require 'button'

-- delegate most business logic to a layer that can be reused by other projects
require 'edit'
Editor_state = {}

-- called both in tests and real run
function App.initialize_globals()
  -- tests currently mostly clear their own state

  -- a few text objects we can avoid recomputing unless the font changes
  Text_cache = {}

  -- blinking cursor
  Cursor_time = 0

  -- for hysteresis in a few places
  Current_time = 0
  Last_focus_time = 0  -- https://love2d.org/forums/viewtopic.php?p=249700
  Last_resize_time = 0
end

-- called only for real run
function App.initialize(arg)
  love.keyboard.setTextInput(true)  -- bring up keyboard on touch screen
  love.keyboard.setKeyRepeat(true)

  Editor_state = nil  -- not used outside editor tests

  love.graphics.setBackgroundColor(1,1,1)

  live.initialize(arg)

  initialize_default_settings()

  -- TODO: app-specific stuff goes here
  love.window.setTitle('TODO')

  if on.initialize then on.initialize(arg) end

  if rawget(_G, 'jit') then
    jit.off()
    jit.flush()
  end
end

function initialize_default_settings()
  local font_height = 20
  love.graphics.setFont(love.graphics.newFont(font_height))
  local em = App.newText(love.graphics.getFont(), 'm')
  initialize_window_geometry(App.width(em))
end

function initialize_window_geometry(em_width)
  -- maximize window
  love.window.setMode(0, 0)  -- maximize
  App.screen.width, App.screen.height, App.screen.flags = love.window.getMode()
  -- shrink height slightly to account for window decoration
  App.screen.height = App.screen.height-100
  App.screen.width = 40*em_width
  App.screen.flags.resizable = true
  App.screen.flags.minwidth = math.min(App.screen.width, 200)
  App.screen.flags.minheight = math.min(App.screen.width, 200)
  love.window.setMode(App.screen.width, App.screen.height, App.screen.flags)
end

function App.resize(w, h)
--?   print(("Window resized to width: %d and height: %d."):format(w, h))
  App.screen.width, App.screen.height = w, h
  Last_resize_time = Current_time
  if on.resize then on.resize(w,h) end
end

function App.filedropped(file)
  if on.filedropped then on.filedropped() end
end

function App.draw()
  if on.draw then on.draw() end
end

function App.update(dt)
  Current_time = Current_time + dt
  -- some hysteresis while resizing
  if Current_time < Last_resize_time + 0.1 then
    return
  end
  Cursor_time = Cursor_time + dt
  live.update(dt)
  if on.update then on.update(dt) end
end

function love.quit()
  if on.quit then on.quit() end
  -- TODO: save settings
end

function App.mousepressed(x,y, mouse_button)
  Cursor_time = 0  -- ensure cursor is visible immediately after it moves
  if on.mouse_pressed then on.mouse_pressed(x,y, mouse_button) end
end

function App.mousereleased(x,y, mouse_button)
  Cursor_time = 0  -- ensure cursor is visible immediately after it moves
  if on.mouse_released then on.mouse_released(x,y, mouse_button) end
end

function App.focus(in_focus)
  if in_focus then
    Last_focus_time = Current_time
  end
  if on.focus then on.focus(in_focus) end
end

-- App.keypressed is defined in keychord.lua

function App.keychord_pressed(chord, key)
  -- ignore events for some time after window in focus (mostly alt-tab)
  if Current_time < Last_focus_time + 0.01 then
    return
  end
  Cursor_time = 0  -- ensure cursor is visible immediately after it moves
  if on.keychord_pressed then on.keychord_pressed(chord, key) end
end

function App.textinput(t)
  -- ignore events for some time after window in focus (mostly alt-tab)
  if Current_time < Last_focus_time + 0.01 then
    return
  end
  Cursor_time = 0  -- ensure cursor is visible immediately after it moves
  if on.textinput then on.textinput(t) end
end

function App.keyreleased(key, scancode)
  -- ignore events for some time after window in focus (mostly alt-tab)
  if Current_time < Last_focus_time + 0.01 then
    return
  end
  Cursor_time = 0  -- ensure cursor is visible immediately after it moves
  if on.key_released then on.key_released(key, scancode, isrepeat) end
end

-- use this sparingly
function to_text(s)
  if Text_cache[s] == nil then
    Text_cache[s] = App.newText(love.graphics.getFont(), s)
  end
  return Text_cache[s]
end