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   else
  70     assert(false, 'unknown app "'..Current_app..'"')
  71   end
  72 end
  73
  74 function App.version_check()
  75   -- available modes: run, error
  76   Error_message = nil
  77   Error_count = 0
  78   -- we'll reuse error mode on load for an initial version check
  79   local supported_versions = {'11.4', '12.0'}  -- put the recommended version first
  80   local minor_version
  81   Major_version, minor_version = love.getVersion()
  82   Version = Major_version..'.'..minor_version
  83   if array.find(supported_versions, Version) == nil then
  84     Current_app = 'error'
  85     Error_message = ("This app doesn't support version %s; please use version %s. Press any key to try it with this version anyway."):format(Version, supported_versions[1])
  86     print(Error_message)
  87     -- continue initializing everything; hopefully we won't have errors during initialization
  88   end
  89 end
  90
  91 function App.initialize_globals()
  92   if Current_app == 'run' then
  93     run.initialize_globals()
  94   elseif Current_app == 'source' then
  95     source.initialize_globals()
  96   else
  97     assert(false, 'unknown app "'..Current_app..'"')
  98   end
  99
 100   -- for hysteresis in a few places
 101   Current_time = 0
 102   Last_focus_time = 0  -- https://love2d.org/forums/viewtopic.php?p=249700
 103   Last_resize_time = 0
 104 end
 105
 106 function App.initialize(arg)
 107   love.keyboard.setTextInput(true)  -- bring up keyboard on touch screen
 108   love.keyboard.setKeyRepeat(true)
 109
 110   love.graphics.setBackgroundColor(1,1,1)
 111
 112   if Current_app == 'run' then
 113     run.initialize(arg)
 114   elseif Current_app == 'source' then
 115     source.initialize(arg)
 116   else
 117     assert(false, 'unknown app "'..Current_app..'"')
 118   end
 119 end
 120
 121 function App.resize(w,h)
 122   if Current_app == 'run' then
 123     if run.resize then run.resize(w,h) end
 124   elseif Current_app == 'source' then
 125     if source.resize then source.resize(w,h) end
 126   else
 127     assert(false, 'unknown app "'..Current_app..'"')
 128   end
 129   Last_resize_time = Current_time
 130 end
 131
 132 function App.filedropped(file)
 133   if Current_app == 'run' then
 134     if run.file_drop then run.file_drop(file) end
 135   elseif Current_app == 'source' then
 136     if source.file_drop then source.file_drop(file) end
 137   else
 138     assert(false, 'unknown app "'..Current_app..'"')
 139   end
 140 end
 141
 142 function App.focus(in_focus)
 143   if in_focus then
 144     Last_focus_time = Current_time
 145   end
 146   if Current_app == 'run' then
 147     if run.focus then run.focus(in_focus) end
 148   elseif Current_app == 'source' then
 149     if source.focus then source.focus(in_focus) end
 150   else
 151     assert(false, 'unknown app "'..Current_app..'"')
 152   end
 153 end
 154
 155 function App.draw()
 156   if Current_app == 'error' then
 157     love.graphics.setColor(0,0,1)
 158     love.graphics.rectangle('fill', 0,0, App.screen.width, App.screen.height)
 159     love.graphics.setColor(1,1,1)
 160     love.graphics.printf(Error_message, 40,40, 600)
 161   elseif Current_app == 'run' then
 162     run.draw()
 163   elseif Current_app == 'source' then
 164     source.draw()
 165   else
 166     assert(false, 'unknown app "'..Current_app..'"')
 167   end
 168 end
 169
 170 function App.update(dt)
 171   Current_time = Current_time + dt
 172   -- some hysteresis while resizing
 173   if Current_time < Last_resize_time + 0.1 then
 174     return
 175   end
 176   --
 177   if Current_app == 'run' then
 178     run.update(dt)
 179   elseif Current_app == 'source' then
 180     source.update(dt)
 181   else
 182     assert(false, 'unknown app "'..Current_app..'"')
 183   end
 184 end
 185
 186 function App.keychord_press(chord, key)
 187   -- ignore events for some time after window in focus (mostly alt-tab)
 188   if Current_time < Last_focus_time + 0.01 then
 189     return
 190   end
 191   --
 192   if Current_app == 'error' then
 193     if chord == 'C-c' then
 194       love.system.setClipboardText(Error_message)
 195     end
 196     return
 197   end
 198   if chord == 'C-e' then
 199     -- carefully save settings
 200     if Current_app == 'run' then
 201       local source_settings = Settings.source
 202       Settings = run.settings()
 203       Settings.source = source_settings
 204       if run.quit then run.quit() end
 205       Current_app = 'source'
 206       -- preserve any Error_message when going from run to source
 207     elseif Current_app == 'source' then
 208       Settings.source = source.settings()
 209       if source.quit then source.quit() end
 210       Current_app = 'run'
 211       Error_message = nil
 212     else
 213       assert(false, 'unknown app "'..Current_app..'"')
 214     end
 215     Settings.current_app = Current_app
 216     love.filesystem.write('config', json.encode(Settings))
 217     -- reboot
 218     load_file_from_source_or_save_directory('main.lua')
 219     App.undo_initialize()
 220     App.run_tests_and_initialize()
 221     return
 222   end
 223   if Current_app == 'run' then
 224     if run.keychord_press then run.keychord_press(chord, key) end
 225   elseif Current_app == 'source' then
 226     if source.keychord_press then source.keychord_press(chord, key) end
 227   else
 228     assert(false, 'unknown app "'..Current_app..'"')
 229   end
 230 end
 231
 232 function App.textinput(t)
 233   if Current_app == 'error' then return end
 234   -- ignore events for some time after window in focus (mostly alt-tab)
 235   if Current_time < Last_focus_time + 0.01 then
 236     return
 237   end
 238   --
 239   if Current_app == 'run' then
 240     if run.text_input then run.text_input(t) end
 241   elseif Current_app == 'source' then
 242     if source.text_input then source.text_input(t) end
 243   else
 244     assert(false, 'unknown app "'..Current_app..'"')
 245   end
 246 end
 247
 248 function App.keyreleased(key, scancode)
 249   if Current_app == 'error' then return end
 250   -- ignore events for some time after window in focus (mostly alt-tab)
 251   if Current_time < Last_focus_time + 0.01 then
 252     return
 253   end
 254   --
 255   if Current_app == 'run' then
 256     if run.key_release then run.key_release(key, scancode) end
 257   elseif Current_app == 'source' then
 258     if source.key_release then source.key_release(key, scancode) end
 259   else
 260     assert(false, 'unknown app "'..Current_app..'"')
 261   end
 262 end
 263
 264 function App.mousepressed(x,y, mouse_button)
 265   if Current_app == 'error' then return end
 266 --?   print('mouse press', x,y)
 267   if Current_app == 'run' then
 268     if run.mouse_press then run.mouse_press(x,y, mouse_button) end
 269   elseif Current_app == 'source' then
 270     if source.mouse_press then source.mouse_press(x,y, mouse_button) end
 271   else
 272     assert(false, 'unknown app "'..Current_app..'"')
 273   end
 274 end
 275
 276 function App.mousereleased(x,y, mouse_button)
 277   if Current_app == 'error' then return end
 278   if Current_app == 'run' then
 279     if run.mouse_release then run.mouse_release(x,y, mouse_button) end
 280   elseif Current_app == 'source' then
 281     if source.mouse_release then source.mouse_release(x,y, mouse_button) end
 282   else
 283     assert(false, 'unknown app "'..Current_app..'"')
 284   end
 285 end
 286
 287 function App.wheelmoved(dx,dy)
 288   if Current_app == 'error' then return end
 289   if Current_app == 'run' then
 290     if run.mouse_wheel_move then run.mouse_wheel_move(dx,dy) end
 291   elseif Current_app == 'source' then
 292     if source.mouse_wheel_move then source.mouse_wheel_move(dx,dy) end
 293   else
 294     assert(false, 'unknown app "'..Current_app..'"')
 295   end
 296 end
 297
 298 function love.quit()
 299   if Current_app == 'error' then return end
 300   if Current_app == 'run' then
 301     local source_settings = Settings.source
 302     Settings = run.settings()
 303     Settings.source = source_settings
 304   else
 305     Settings.source = source.settings()
 306   end
 307   Settings.current_app = Current_app
 308   love.filesystem.write('config', json.encode(Settings))
 309   if Current_app == 'run' then
 310     if run.quit then run.quit() end
 311   elseif Current_app == 'source' then
 312     if source.quit then source.quit() end
 313   else
 314     assert(false, 'unknown app "'..Current_app..'"')
 315   end
 316 end