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 -- both sides use drawings
  28 load_file_from_source_or_save_directory('icons.lua')
  29 load_file_from_source_or_save_directory('drawing.lua')
  30   load_file_from_source_or_save_directory('geom.lua')
  31   load_file_from_source_or_save_directory('help.lua')
  32 load_file_from_source_or_save_directory('drawing_tests.lua')
  33
  34 -- but some files we want to only load sometimes
  35 function App.load()
  36   log_new('session')
  37   if love.filesystem.getInfo('config') then
  38     Settings = json.decode(love.filesystem.read('config'))
  39     Current_app = Settings.current_app
  40   end
  41
  42   if Current_app == nil then
  43     Current_app = 'run'
  44   end
  45
  46   if Current_app == 'run' then
  47     load_file_from_source_or_save_directory('file.lua')
  48     load_file_from_source_or_save_directory('run.lua')
  49       load_file_from_source_or_save_directory('edit.lua')
  50       load_file_from_source_or_save_directory('text.lua')
  51         load_file_from_source_or_save_directory('search.lua')
  52         load_file_from_source_or_save_directory('select.lua')
  53         load_file_from_source_or_save_directory('undo.lua')
  54       load_file_from_source_or_save_directory('text_tests.lua')
  55     load_file_from_source_or_save_directory('run_tests.lua')
  56   elseif Current_app == 'source' then
  57     load_file_from_source_or_save_directory('source_file.lua')
  58     load_file_from_source_or_save_directory('source.lua')
  59       load_file_from_source_or_save_directory('commands.lua')
  60       load_file_from_source_or_save_directory('source_edit.lua')
  61       load_file_from_source_or_save_directory('log_browser.lua')
  62       load_file_from_source_or_save_directory('source_text.lua')
  63         load_file_from_source_or_save_directory('search.lua')
  64         load_file_from_source_or_save_directory('source_select.lua')
  65         load_file_from_source_or_save_directory('source_undo.lua')
  66         load_file_from_source_or_save_directory('colorize.lua')
  67       load_file_from_source_or_save_directory('source_text_tests.lua')
  68     load_file_from_source_or_save_directory('source_tests.lua')
  69   elseif Current_app == 'error' then
  70   else
  71     assert(false, 'unknown app "'..Current_app..'"')
  72   end
  73 end
  74
  75 function App.initialize_globals()
  76   Supported_versions = {'11.5', '11.4', '12.0'}  -- put the recommended version first
  77   check_love_version_for_tests()
  78
  79   if Current_app == 'run' then
  80     run.initialize_globals()
  81   elseif Current_app == 'source' then
  82     source.initialize_globals()
  83   elseif Current_app == 'error' then
  84   else
  85     assert(false, 'unknown app "'..Current_app..'"')
  86   end
  87
  88   -- for hysteresis in a few places
  89   Current_time = 0
  90   Last_focus_time = 0  -- https://love2d.org/forums/viewtopic.php?p=249700
  91   Last_resize_time = 0
  92 end
  93
  94 function check_love_version_for_tests()
  95   if array.find(Supported_versions, Version) == nil then
  96     Unsupported_version = true
  97     -- warning to include in an error message if any tests failed
  98     Warning_before_tests = ("This app hasn't been tested with LÖVE version %s."):format(Version)
  99   end
 100 end
 101
 102 function App.love_version_check()
 103   if Unsupported_version then
 104     Current_app = 'error'
 105     Error_message = ("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])
 106     print(Error_message)
 107     -- continue initializing everything; hopefully we won't have errors during initialization
 108   end
 109 end
 110
 111 function App.initialize(arg)
 112   love.keyboard.setTextInput(true)  -- bring up keyboard on touch screen
 113   love.keyboard.setKeyRepeat(true)
 114
 115   love.graphics.setBackgroundColor(1,1,1)
 116
 117   if Current_app == 'run' then
 118     run.initialize(arg)
 119   elseif Current_app == 'source' then
 120     source.initialize(arg)
 121   elseif Current_app == 'error' then
 122   else
 123     assert(false, 'unknown app "'..Current_app..'"')
 124   end
 125 end
 126
 127 function App.resize(w,h)
 128   if Current_app == 'run' then
 129     if run.resize then run.resize(w,h) end
 130   elseif Current_app == 'source' then
 131     if source.resize then source.resize(w,h) end
 132   elseif Current_app == 'error' then
 133   else
 134     assert(false, 'unknown app "'..Current_app..'"')
 135   end
 136   Last_resize_time = Current_time
 137 end
 138
 139 function App.filedropped(file)
 140   if Current_app == 'run' then
 141     if run.file_drop then run.file_drop(file) end
 142   elseif Current_app == 'source' then
 143     if source.file_drop then source.file_drop(file) end
 144   elseif Current_app == 'error' then
 145   else
 146     assert(false, 'unknown app "'..Current_app..'"')
 147   end
 148 end
 149
 150 function App.focus(in_focus)
 151   if in_focus then
 152     Last_focus_time = Current_time
 153   end
 154   if Current_app == 'run' then
 155     if run.focus then run.focus(in_focus) end
 156   elseif Current_app == 'source' then
 157     if source.focus then source.focus(in_focus) end
 158   elseif Current_app == 'error' then
 159   else
 160     assert(false, 'unknown app "'..Current_app..'"')
 161   end
 162 end
 163
 164 function App.draw()
 165   if Current_app == 'run' then
 166     run.draw()
 167   elseif Current_app == 'source' then
 168     source.draw()
 169   elseif Current_app == 'error' then
 170     love.graphics.setColor(0,0,1)
 171     love.graphics.rectangle('fill', 0,0, App.screen.width, App.screen.height)
 172     love.graphics.setColor(1,1,1)
 173     love.graphics.printf(Error_message, 40,40, 600)
 174   else
 175     assert(false, 'unknown app "'..Current_app..'"')
 176   end
 177 end
 178
 179 function App.update(dt)
 180   Current_time = Current_time + dt
 181   -- some hysteresis while resizing
 182   if Current_time < Last_resize_time + 0.1 then
 183     return
 184   end
 185   --
 186   if Current_app == 'run' then
 187     run.update(dt)
 188   elseif Current_app == 'source' then
 189     source.update(dt)
 190   elseif Current_app == 'error' then
 191   else
 192     assert(false, 'unknown app "'..Current_app..'"')
 193   end
 194 end
 195
 196 function App.keychord_press(chord, key)
 197   -- ignore events for some time after window in focus (mostly alt-tab)
 198   if Current_time < Last_focus_time + 0.01 then
 199     return
 200   end
 201   --
 202   if Current_app == 'error' then
 203     if chord == 'C-c' then
 204       love.system.setClipboardText(Error_message)
 205     end
 206     return
 207   end
 208   if chord == 'C-e' then
 209     -- carefully save settings
 210     if Current_app == 'run' then
 211       local source_settings = Settings.source
 212       Settings = run.settings()
 213       Settings.source = source_settings
 214       if run.quit then run.quit() end
 215       Current_app = 'source'
 216       -- preserve any Error_message when going from run to source
 217     elseif Current_app == 'source' then
 218       Settings.source = source.settings()
 219       if source.quit then source.quit() end
 220       Current_app = 'run'
 221       Error_message = nil
 222     elseif Current_app == 'error' then
 223     else
 224       assert(false, 'unknown app "'..Current_app..'"')
 225     end
 226     Settings.current_app = Current_app
 227     love.filesystem.write('config', json.encode(Settings))
 228     -- reboot
 229     load_file_from_source_or_save_directory('main.lua')
 230     App.undo_initialize()
 231     App.run_tests_and_initialize()
 232     return
 233   end
 234   if Current_app == 'run' then
 235     if run.keychord_press then run.keychord_press(chord, key) end
 236   elseif Current_app == 'source' then
 237     if source.keychord_press then source.keychord_press(chord, key) end
 238   else
 239     assert(false, 'unknown app "'..Current_app..'"')
 240   end
 241 end
 242
 243 function App.textinput(t)
 244   if Current_app == 'error' then return end
 245   -- ignore events for some time after window in focus (mostly alt-tab)
 246   if Current_time < Last_focus_time + 0.01 then
 247     return
 248   end
 249   --
 250   if Current_app == 'run' then
 251     if run.text_input then run.text_input(t) end
 252   elseif Current_app == 'source' then
 253     if source.text_input then source.text_input(t) end
 254   else
 255     assert(false, 'unknown app "'..Current_app..'"')
 256   end
 257 end
 258
 259 function App.keyreleased(key, scancode)
 260   -- ignore events for some time after window in focus (mostly alt-tab)
 261   if Current_time < Last_focus_time + 0.01 then
 262     return
 263   end
 264   --
 265   if Current_app == 'error' then
 266     Current_app = 'run'
 267   elseif Current_app == 'run' then
 268     if run.key_release then run.key_release(key, scancode) end
 269   elseif Current_app == 'source' then
 270     if source.key_release then source.key_release(key, scancode) end
 271   else
 272     assert(false, 'unknown app "'..Current_app..'"')
 273   end
 274 end
 275
 276 function App.mousepressed(x,y, mouse_button)
 277   if Current_app == 'error' then return end
 278 --?   print('mouse press', x,y)
 279   if Current_app == 'run' then
 280     if run.mouse_press then run.mouse_press(x,y, mouse_button) end
 281   elseif Current_app == 'source' then
 282     if source.mouse_press then source.mouse_press(x,y, mouse_button) end
 283   else
 284     assert(false, 'unknown app "'..Current_app..'"')
 285   end
 286 end
 287
 288 function App.mousereleased(x,y, mouse_button)
 289   if Current_app == 'error' then return end
 290   if Current_app == 'run' then
 291     if run.mouse_release then run.mouse_release(x,y, mouse_button) end
 292   elseif Current_app == 'source' then
 293     if source.mouse_release then source.mouse_release(x,y, mouse_button) end
 294   else
 295     assert(false, 'unknown app "'..Current_app..'"')
 296   end
 297 end
 298
 299 function App.wheelmoved(dx,dy)
 300   if Current_app == 'error' then return end
 301   if Current_app == 'run' then
 302     if run.mouse_wheel_move then run.mouse_wheel_move(dx,dy) end
 303   elseif Current_app == 'source' then
 304     if source.mouse_wheel_move then source.mouse_wheel_move(dx,dy) end
 305   else
 306     assert(false, 'unknown app "'..Current_app..'"')
 307   end
 308 end
 309
 310 function love.quit()
 311   if Current_app == 'error' then return end
 312   if Current_app == 'run' then
 313     local source_settings = Settings.source
 314     Settings = run.settings()
 315     Settings.source = source_settings
 316   else
 317     Settings.source = source.settings()
 318   end
 319   Settings.current_app = Current_app
 320   love.filesystem.write('config', json.encode(Settings))
 321   if Current_app == 'run' then
 322     if run.quit then run.quit() end
 323   elseif Current_app == 'source' then
 324     if source.quit then source.quit() end
 325   else
 326     assert(false, 'unknown app "'..Current_app..'"')
 327   end
 328 end