main.lua

   1 -- Entrypoint for the app. You can edit this file from within the app if
   2 -- you're careful.
   3
   4 -- files that come with LÖVE; we can't edit those from within the app
   5 utf8 = require 'utf8'
   6
   7 function load_file_from_source_or_save_directory(filename)
   8   local contents = love.filesystem.read(filename)
   9   local code, err = loadstring(contents, filename)
  10   if code == nil then
  11     error(err)
  12   end
  13   return code()
  14 end
  15
  16 json = load_file_from_source_or_save_directory('json.lua')
  17
  18 load_file_from_source_or_save_directory('app.lua')
  19 load_file_from_source_or_save_directory('test.lua')
  20
  21 load_file_from_source_or_save_directory('keychord.lua')
  22 load_file_from_source_or_save_directory('button.lua')
  23
  24 -- both sides require (different parts of) the logging framework
  25 load_file_from_source_or_save_directory('log.lua')
  26
  27 -- but some files we want to only load sometimes
  28 function App.load()
  29   log_new('session')
  30   if love.filesystem.getInfo('config') then
  31     Settings = json.decode(love.filesystem.read('config'))
  32     Current_app = Settings.current_app
  33   end
  34
  35   -- Current_app =
  36   --  | run
  37   --  | source
  38   --  | {name=warning message='...' next_app = run|source}
  39
  40   if Current_app == nil then
  41     Current_app = 'run'
  42   end
  43
  44   if Current_app == 'run' then
  45     load_file_from_source_or_save_directory('file.lua')
  46     load_file_from_source_or_save_directory('run.lua')
  47       load_file_from_source_or_save_directory('edit.lua')
  48       load_file_from_source_or_save_directory('text.lua')
  49         load_file_from_source_or_save_directory('search.lua')
  50         load_file_from_source_or_save_directory('select.lua')
  51         load_file_from_source_or_save_directory('undo.lua')
  52       load_file_from_source_or_save_directory('text_tests.lua')
  53     load_file_from_source_or_save_directory('run_tests.lua')
  54   elseif Current_app == 'source' then
  55     load_file_from_source_or_save_directory('source_file.lua')
  56     load_file_from_source_or_save_directory('source.lua')
  57       load_file_from_source_or_save_directory('commands.lua')
  58       load_file_from_source_or_save_directory('source_edit.lua')
  59       load_file_from_source_or_save_directory('log_browser.lua')
  60       load_file_from_source_or_save_directory('source_text.lua')
  61         load_file_from_source_or_save_directory('search.lua')
  62         load_file_from_source_or_save_directory('source_select.lua')
  63         load_file_from_source_or_save_directory('source_undo.lua')
  64         load_file_from_source_or_save_directory('colorize.lua')
  65       load_file_from_source_or_save_directory('source_text_tests.lua')
  66       load_file_from_source_or_save_directory('icons.lua')
  67       load_file_from_source_or_save_directory('drawing.lua')
  68         load_file_from_source_or_save_directory('geom.lua')
  69         load_file_from_source_or_save_directory('help.lua')
  70       load_file_from_source_or_save_directory('drawing_tests.lua')
  71     load_file_from_source_or_save_directory('source_tests.lua')
  72   elseif current_app_is_warning() then
  73   else
  74     assert(false, 'unknown app "'..Current_app..'"')
  75   end
  76 end
  77
  78 function App.initialize_globals()
  79   Supported_versions = {'11.5', '11.4', '12.0'}  -- put the recommended version first
  80   check_love_version_for_tests()
  81
  82   if Current_app == 'run' then
  83     run.initialize_globals()
  84   elseif Current_app == 'source' then
  85     source.initialize_globals()
  86   elseif current_app_is_warning() then
  87   else
  88     assert(false, 'unknown app "'..Current_app..'"')
  89   end
  90
  91   -- for hysteresis in a few places
  92   Current_time = 0
  93   Last_focus_time = 0  -- https://love2d.org/forums/viewtopic.php?p=249700
  94   Last_resize_time = 0
  95
  96   -- Another weird bit for a class of corner cases. E.g.:
  97   -- * I press ctrl+e, switch Current_app. I don't want the new app to receive
  98   --   text_input and key_release events.
  99   -- If I try to avoid text_input events by switching modes on key_release, I
 100   -- hit a new problem:
 101   -- * I press ctrl+e, am running an untested version, Current_app goes to
 102   --   'warning', and immediately rolls back out of 'warning' in the
 103   --   key_release event.
 104   -- Skip_rest_of_key_events is ugly, but feels cleaner than creating yet
 105   -- another possible value for Current_app.
 106   Skip_rest_of_key_events = nil
 107 end
 108
 109 function check_love_version_for_tests()
 110   if array.find(Supported_versions, Version) == nil then
 111     -- warning to include in an error message if any tests failed
 112     Warning_before_tests = ("This app hasn't been tested with LÖVE version %s."):format(Version)
 113   end
 114 end
 115
 116 function App.initialize(arg)
 117   love.keyboard.setTextInput(true)  -- bring up keyboard on touch screen
 118   love.keyboard.setKeyRepeat(true)
 119
 120   love.graphics.setBackgroundColor(1,1,1)
 121
 122   if Current_app == 'run' then
 123     run.initialize(arg)
 124   elseif Current_app == 'source' then
 125     source.initialize(arg)
 126   elseif current_app_is_warning() then
 127   else
 128     assert(false, 'unknown app "'..Current_app..'"')
 129   end
 130
 131   check_love_version()
 132 end
 133
 134 function check_love_version()
 135   if array.find(Supported_versions, Version) == nil then
 136     show_warning(
 137       ("This app hasn't been tested with LÖVE version %s; please switch to version %s if you run into issues. Press any key to continue."):format(Version, Supported_versions[1]))
 138     -- continue initializing everything; hopefully we won't have errors during initialization
 139   end
 140 end
 141
 142 function App.resize(w,h)
 143   if current_app_is_warning() then return end
 144   if Current_app == 'run' then
 145     if run.resize then run.resize(w,h) end
 146   elseif Current_app == 'source' then
 147     if source.resize then source.resize(w,h) end
 148   else
 149     assert(false, 'unknown app "'..Current_app..'"')
 150   end
 151   Last_resize_time = Current_time
 152 end
 153
 154 function App.filedropped(file)
 155   if current_app_is_warning() then return end
 156   if Current_app == 'run' then
 157     if run.file_drop then run.file_drop(file) end
 158   elseif Current_app == 'source' then
 159     if source.file_drop then source.file_drop(file) end
 160   else
 161     assert(false, 'unknown app "'..Current_app..'"')
 162   end
 163 end
 164
 165 function App.focus(in_focus)
 166   if current_app_is_warning() then return end
 167   if in_focus then
 168     Last_focus_time = Current_time
 169   end
 170   if Current_app == 'run' then
 171     if run.focus then run.focus(in_focus) end
 172   elseif Current_app == 'source' then
 173     if source.focus then source.focus(in_focus) end
 174   else
 175     assert(false, 'unknown app "'..Current_app..'"')
 176   end
 177 end
 178
 179 function App.draw()
 180   if Current_app == 'run' then
 181     run.draw()
 182   elseif Current_app == 'source' then
 183     source.draw()
 184   elseif current_app_is_warning() then
 185     love.graphics.setColor(0,0,1)
 186     love.graphics.rectangle('fill', 0,0, App.screen.width, App.screen.height)
 187     love.graphics.setColor(1,1,1)
 188     love.graphics.printf(Current_app.message, 40,40, 600)
 189   else
 190     assert(false, 'unknown app "'..Current_app..'"')
 191   end
 192 end
 193
 194 function App.update(dt)
 195   Current_time = Current_time + dt
 196   if current_app_is_warning() then return end
 197   -- some hysteresis while resizing
 198   if Current_time < Last_resize_time + 0.1 then
 199     return
 200   end
 201   --
 202   if Current_app == 'run' then
 203     run.update(dt)
 204   elseif Current_app == 'source' then
 205     source.update(dt)
 206   else
 207     assert(false, 'unknown app "'..Current_app..'"')
 208   end
 209 end
 210
 211 function App.keychord_press(chord, key)
 212   -- ignore events for some time after window in focus (mostly alt-tab)
 213   if Current_time < Last_focus_time + 0.01 then
 214     return
 215   end
 216   --
 217   Skip_rest_of_key_events = nil
 218   if current_app_is_warning() then
 219     if chord == 'C-c' then
 220       love.system.setClipboardText(Error_message)
 221     else
 222       clear_warning()
 223       Skip_rest_of_key_events = true
 224     end
 225     return
 226   end
 227   if chord == 'C-e' then
 228     -- carefully save settings
 229     if Current_app == 'run' then
 230       local source_settings = Settings.source
 231       Settings = run.settings()
 232       Settings.source = source_settings
 233       if run.quit then run.quit() end
 234       Current_app = 'source'
 235       -- preserve any Error_message when going from run to source
 236     elseif Current_app == 'source' then
 237       Settings.source = source.settings()
 238       if source.quit then source.quit() end
 239       Current_app = 'run'
 240       Error_message = nil
 241     elseif current_app_is_warning() then
 242     else
 243       assert(false, 'unknown app "'..Current_app..'"')
 244     end
 245     Settings.current_app = Current_app
 246     love.filesystem.write('config', json.encode(Settings))
 247     -- reboot
 248     load_file_from_source_or_save_directory('main.lua')
 249     App.undo_initialize()
 250     App.run_tests_and_initialize()
 251     Skip_rest_of_key_events = true
 252     return
 253   end
 254   if Current_app == 'run' then
 255     if run.keychord_press then run.keychord_press(chord, key) end
 256   elseif Current_app == 'source' then
 257     if source.keychord_press then source.keychord_press(chord, key) end
 258   else
 259     assert(false, 'unknown app "'..Current_app..'"')
 260   end
 261 end
 262
 263 function App.textinput(t)
 264   if current_app_is_warning() then return end
 265   -- ignore events for some time after window in focus (mostly alt-tab)
 266   if Current_time < Last_focus_time + 0.01 then
 267     return
 268   end
 269   --
 270   if Skip_rest_of_key_events then return end
 271   if Current_app == 'run' then
 272     if run.text_input then run.text_input(t) end
 273   elseif Current_app == 'source' then
 274     if source.text_input then source.text_input(t) end
 275   else
 276     assert(false, 'unknown app "'..Current_app..'"')
 277   end
 278 end
 279
 280 function App.keyreleased(key, scancode)
 281   if current_app_is_warning() then return end
 282   -- ignore events for some time after window in focus (mostly alt-tab)
 283   if Current_time < Last_focus_time + 0.01 then
 284     return
 285   end
 286   --
 287   if Skip_rest_of_key_events then return end
 288   if Current_app == 'run' then
 289     if run.key_release then run.key_release(key, scancode) end
 290   elseif Current_app == 'source' then
 291     if source.key_release then source.key_release(key, scancode) end
 292   else
 293     assert(false, 'unknown app "'..Current_app..'"')
 294   end
 295 end
 296
 297 function App.mousepressed(x,y, mouse_button)
 298   if current_app_is_warning() then return end
 299 --?   print('mouse press', x,y)
 300   if Current_app == 'run' then
 301     if run.mouse_press then run.mouse_press(x,y, mouse_button) end
 302   elseif Current_app == 'source' then
 303     if source.mouse_press then source.mouse_press(x,y, mouse_button) end
 304   else
 305     assert(false, 'unknown app "'..Current_app..'"')
 306   end
 307 end
 308
 309 function App.mousereleased(x,y, mouse_button)
 310   if current_app_is_warning() then return end
 311   if Current_app == 'run' then
 312     if run.mouse_release then run.mouse_release(x,y, mouse_button) end
 313   elseif Current_app == 'source' then
 314     if source.mouse_release then source.mouse_release(x,y, mouse_button) end
 315   else
 316     assert(false, 'unknown app "'..Current_app..'"')
 317   end
 318 end
 319
 320 function App.wheelmoved(dx,dy)
 321   if current_app_is_warning() then return end
 322   if Current_app == 'run' then
 323     if run.mouse_wheel_move then run.mouse_wheel_move(dx,dy) end
 324   elseif Current_app == 'source' then
 325     if source.mouse_wheel_move then source.mouse_wheel_move(dx,dy) end
 326   else
 327     assert(false, 'unknown app "'..Current_app..'"')
 328   end
 329 end
 330
 331 function love.quit()
 332   if current_app_is_warning() then return end
 333   if Current_app == 'run' then
 334     local source_settings = Settings.source
 335     Settings = run.settings()
 336     Settings.source = source_settings
 337   else
 338     Settings.source = source.settings()
 339   end
 340   Settings.current_app = Current_app
 341   love.filesystem.write('config', json.encode(Settings))
 342   if Current_app == 'run' then
 343     if run.quit then run.quit() end
 344   elseif Current_app == 'source' then
 345     if source.quit then source.quit() end
 346   else
 347     assert(false, 'unknown app "'..Current_app..'"')
 348   end
 349 end
 350
 351 function current_app_is_warning()
 352   return type(Current_app) == 'table' and Current_app.name == 'warning'
 353 end
 354
 355 function show_warning(message)
 356   assert(type(Current_app) == 'string')
 357   Current_app = {
 358     name = 'warning',
 359     message = message,
 360     next_app = Current_app,
 361   }
 362 end
 363
 364 function clear_warning()
 365   assert(type(Current_app) == 'table')
 366   Current_app = Current_app.next_app
 367 end