main.lua

   1 -- Wrapper that combines the app with a 'source editor' that allows editing
   2 -- the app in place.
   3 --
   4 -- The source editor is a sharp tool. I find it convenient, but I also often
   5 -- end up in a bad state that requires dropping down to external tools
   6 -- (editor, file manager) to fix.
   7 --
   8 -- Downstream forks provide a better, "freewheeling" experience for editing
   9 -- apps live. The source editor provides a half-baked experience for editing
  10 -- some of the primitives used by true freewheeling apps.
  11
  12 -- files that come with LÖVE; we can't edit those from within the app
  13 utf8 = require 'utf8'
  14
  15 function load_file_from_source_or_save_directory(filename)
  16   local contents = love.filesystem.read(filename)
  17   local code, err = loadstring(contents, filename)
  18   if code == nil then
  19     error(err)
  20   end
  21   return code()
  22 end
  23
  24 json = load_file_from_source_or_save_directory('json.lua')
  25
  26 load_file_from_source_or_save_directory('app.lua')
  27 load_file_from_source_or_save_directory('test.lua')
  28
  29 load_file_from_source_or_save_directory('keychord.lua')
  30 load_file_from_source_or_save_directory('button.lua')
  31
  32 -- both sides require (different parts of) the logging framework
  33 load_file_from_source_or_save_directory('log.lua')
  34
  35 -- but some files we want to only load sometimes
  36 function App.load()
  37   log_new('session')
  38   if love.filesystem.getInfo('config') then
  39     Settings = json.decode(love.filesystem.read('config'))
  40     Current_app = Settings.current_app
  41   end
  42
  43   if Current_app == nil then
  44     Current_app = 'run'
  45   end
  46
  47   if Current_app == 'run' then
  48     load_file_from_source_or_save_directory('file.lua')
  49     load_file_from_source_or_save_directory('run.lua')
  50       load_file_from_source_or_save_directory('edit.lua')
  51       load_file_from_source_or_save_directory('text.lua')
  52         load_file_from_source_or_save_directory('search.lua')
  53         load_file_from_source_or_save_directory('select.lua')
  54         load_file_from_source_or_save_directory('undo.lua')
  55       load_file_from_source_or_save_directory('text_tests.lua')
  56     load_file_from_source_or_save_directory('run_tests.lua')
  57   elseif Current_app == 'source' then
  58     load_file_from_source_or_save_directory('source_file.lua')
  59     load_file_from_source_or_save_directory('source.lua')
  60       load_file_from_source_or_save_directory('commands.lua')
  61       load_file_from_source_or_save_directory('source_edit.lua')
  62       load_file_from_source_or_save_directory('log_browser.lua')
  63       load_file_from_source_or_save_directory('source_text.lua')
  64         load_file_from_source_or_save_directory('search.lua')
  65         load_file_from_source_or_save_directory('source_select.lua')
  66         load_file_from_source_or_save_directory('source_undo.lua')
  67         load_file_from_source_or_save_directory('colorize.lua')
  68       load_file_from_source_or_save_directory('source_text_tests.lua')
  69       load_file_from_source_or_save_directory('icons.lua')
  70       load_file_from_source_or_save_directory('drawing.lua')
  71         load_file_from_source_or_save_directory('geom.lua')
  72         load_file_from_source_or_save_directory('help.lua')
  73       load_file_from_source_or_save_directory('drawing_tests.lua')
  74     load_file_from_source_or_save_directory('source_tests.lua')
  75   else
  76     assert(false, 'unknown app "'..Current_app..'"')
  77   end
  78 end
  79
  80 function App.initialize_globals()
  81   if Current_app == 'run' then
  82     run.initialize_globals()
  83   elseif Current_app == 'source' then
  84     source.initialize_globals()
  85   else
  86     assert(false, 'unknown app "'..Current_app..'"')
  87   end
  88
  89   -- for hysteresis in a few places
  90   Current_time = 0
  91   Last_focus_time = 0  -- https://love2d.org/forums/viewtopic.php?p=249700
  92   Last_resize_time = 0
  93 end
  94
  95 function App.initialize(arg)
  96   love.keyboard.setTextInput(true)  -- bring up keyboard on touch screen
  97   love.keyboard.setKeyRepeat(true)
  98
  99   love.graphics.setBackgroundColor(1,1,1)
 100
 101   if Current_app == 'run' then
 102     run.initialize(arg)
 103   elseif Current_app == 'source' then
 104     source.initialize(arg)
 105   else
 106     assert(false, 'unknown app "'..Current_app..'"')
 107   end
 108 end
 109
 110 function App.resize(w,h)
 111   if Current_app == 'run' then
 112     if run.resize then run.resize(w,h) end
 113   elseif Current_app == 'source' then
 114     if source.resize then source.resize(w,h) end
 115   else
 116     assert(false, 'unknown app "'..Current_app..'"')
 117   end
 118   Last_resize_time = Current_time
 119 end
 120
 121 function App.filedropped(file)
 122   if Current_app == 'run' then
 123     if run.file_drop then run.file_drop(file) end
 124   elseif Current_app == 'source' then
 125     if source.file_drop then source.file_drop(file) end
 126   else
 127     assert(false, 'unknown app "'..Current_app..'"')
 128   end
 129 end
 130
 131 function App.focus(in_focus)
 132   if in_focus then
 133     Last_focus_time = Current_time
 134   end
 135   if Current_app == 'run' then
 136     if run.focus then run.focus(in_focus) end
 137   elseif Current_app == 'source' then
 138     if source.focus then source.focus(in_focus) end
 139   else
 140     assert(false, 'unknown app "'..Current_app..'"')
 141   end
 142 end
 143
 144 function App.draw()
 145   if Current_app == 'run' then
 146     run.draw()
 147   elseif Current_app == 'source' then
 148     source.draw()
 149   else
 150     assert(false, 'unknown app "'..Current_app..'"')
 151   end
 152 end
 153
 154 function App.update(dt)
 155   Current_time = Current_time + dt
 156   -- some hysteresis while resizing
 157   if Current_time < Last_resize_time + 0.1 then
 158     return
 159   end
 160   --
 161   if Current_app == 'run' then
 162     run.update(dt)
 163   elseif Current_app == 'source' then
 164     source.update(dt)
 165   else
 166     assert(false, 'unknown app "'..Current_app..'"')
 167   end
 168 end
 169
 170 function App.keychord_press(chord, key)
 171   -- ignore events for some time after window in focus (mostly alt-tab)
 172   if Current_time < Last_focus_time + 0.01 then
 173     return
 174   end
 175   --
 176   if chord == 'C-e' then
 177     -- carefully save settings
 178     if Current_app == 'run' then
 179       local source_settings = Settings.source
 180       Settings = run.settings()
 181       Settings.source = source_settings
 182       if run.quit then run.quit() end
 183       Current_app = 'source'
 184     elseif Current_app == 'source' then
 185       Settings.source = source.settings()
 186       if source.quit then source.quit() end
 187       Current_app = 'run'
 188     else
 189       assert(false, 'unknown app "'..Current_app..'"')
 190     end
 191     Settings.current_app = Current_app
 192     love.filesystem.write('config', json.encode(Settings))
 193     -- reboot
 194     load_file_from_source_or_save_directory('main.lua')
 195     App.undo_initialize()
 196     App.run_tests_and_initialize()
 197     return
 198   end
 199   if Current_app == 'run' then
 200     if run.keychord_press then run.keychord_press(chord, key) end
 201   elseif Current_app == 'source' then
 202     if source.keychord_press then source.keychord_press(chord, key) end
 203   else
 204     assert(false, 'unknown app "'..Current_app..'"')
 205   end
 206 end
 207
 208 function App.textinput(t)
 209   -- ignore events for some time after window in focus (mostly alt-tab)
 210   if Current_time < Last_focus_time + 0.01 then
 211     return
 212   end
 213   --
 214   if Current_app == 'run' then
 215     if run.text_input then run.text_input(t) end
 216   elseif Current_app == 'source' then
 217     if source.text_input then source.text_input(t) end
 218   else
 219     assert(false, 'unknown app "'..Current_app..'"')
 220   end
 221 end
 222
 223 function App.keyreleased(key, scancode)
 224   -- ignore events for some time after window in focus (mostly alt-tab)
 225   if Current_time < Last_focus_time + 0.01 then
 226     return
 227   end
 228   --
 229   if Current_app == 'run' then
 230     if run.key_release then run.key_release(key, scancode) end
 231   elseif Current_app == 'source' then
 232     if source.key_release then source.key_release(key, scancode) end
 233   else
 234     assert(false, 'unknown app "'..Current_app..'"')
 235   end
 236 end
 237
 238 function App.mousepressed(x,y, mouse_button)
 239 --?   print('mouse press', x,y)
 240   if Current_app == 'run' then
 241     if run.mouse_press then run.mouse_press(x,y, mouse_button) end
 242   elseif Current_app == 'source' then
 243     if source.mouse_press then source.mouse_press(x,y, mouse_button) end
 244   else
 245     assert(false, 'unknown app "'..Current_app..'"')
 246   end
 247 end
 248
 249 function App.mousereleased(x,y, mouse_button)
 250   if Current_app == 'run' then
 251     if run.mouse_release then run.mouse_release(x,y, mouse_button) end
 252   elseif Current_app == 'source' then
 253     if source.mouse_release then source.mouse_release(x,y, mouse_button) end
 254   else
 255     assert(false, 'unknown app "'..Current_app..'"')
 256   end
 257 end
 258
 259 function App.wheelmoved(dx,dy)
 260   if Current_app == 'run' then
 261     if run.mouse_wheel_move then run.mouse_wheel_move(dx,dy) end
 262   elseif Current_app == 'source' then
 263     if source.mouse_wheel_move then source.mouse_wheel_move(dx,dy) end
 264   else
 265     assert(false, 'unknown app "'..Current_app..'"')
 266   end
 267 end
 268
 269 function love.quit()
 270   if Current_app == 'run' then
 271     local source_settings = Settings.source
 272     Settings = run.settings()
 273     Settings.source = source_settings
 274   else
 275     Settings.source = source.settings()
 276   end
 277   Settings.current_app = Current_app
 278   love.filesystem.write('config', json.encode(Settings))
 279   if Current_app == 'run' then
 280     if run.quit then run.quit() end
 281   elseif Current_app == 'source' then
 282     if source.quit then source.quit() end
 283   else
 284     assert(false, 'unknown app "'..Current_app..'"')
 285   end
 286 end