stop handling drawings in cursor_pos computations

Dependencies

• [2] VVXVV2D2 change data model; text can now have metadata
• [3] PRPPZGDY speed up some obvious common cases
• [4] RJGZD4IN binary search to most natural up/down with proportional fonts
• [5] IYW7X3WL left/right cursor movement, deleting characters
• [6] KHFU5NFD bugfix: up/down across drawings
• [7] JS6JSYOT online contextual help
• [8] 3CS5KKCI up/down cursor movement
• [*] OTIBCAUJ love2d scaffold

Change contents

• replacement in main.lua at line 562
  [3.581]→[2.2193:2259](∅→∅),[3.338]→[3.581:615](∅→∅),[2.2259]→[3.581:615](∅→∅),[3.581]→[3.581:615](∅→∅),[3.615]→[2.2260:2342](∅→∅)
  − local old_x = cursor_x(lines[cursor_line].data, cursor_pos)

  − cursor_line = cursor_line-1

  − cursor_pos = nearest_cursor_pos(lines[cursor_line].data, old_x, cursor_pos)
  [3.581]

  [3.1510]
  + if lines[cursor_line].mode == 'text' then

  + local old_x = cursor_x(lines[cursor_line].data, cursor_pos)

  + cursor_line = cursor_line-1

  + cursor_pos = nearest_cursor_pos(lines[cursor_line].data, old_x, cursor_pos)

  + else

  + cursor_line = cursor_line+1

  + end
• replacement in main.lua at line 572
  [3.779]→[2.2343:2409](∅→∅),[3.466]→[3.779:813](∅→∅),[2.2409]→[3.779:813](∅→∅),[3.779]→[3.779:813](∅→∅),[3.813]→[2.2410:2492](∅→∅)
  − local old_x = cursor_x(lines[cursor_line].data, cursor_pos)

  − cursor_line = cursor_line+1

  − cursor_pos = nearest_cursor_pos(lines[cursor_line].data, old_x, cursor_pos)
  [3.779]

  [3.913]
  + if lines[cursor_line].mode == 'text' then

  + local old_x = cursor_x(lines[cursor_line].data, cursor_pos)

  + cursor_line = cursor_line+1

  + cursor_pos = nearest_cursor_pos(lines[cursor_line].data, old_x, cursor_pos)

  + else

  + cursor_line = cursor_line+1

  + end
• edit in main.lua at line 733
  [3.588]→[2.2920:2966](∅→∅)
  − if line.mode == 'drawing' then return 0 end
• edit in main.lua at line 739
  [3.200]→[2.2967:3016](∅→∅)
  − if line.mode == 'drawing' then return hint end