eliminate assumptions that line length == size in bytes

Dependencies

• [2] A2TQYJ6J .
• [3] H2DPLWMV snapshot: wrapping long lines at word boundaries
• [4] B3IWYWSR delete another arg that can be deduced
• [5] JCSLDGAH beginnings of support for multiple shapes
• [6] VVXVV2D2 change data model; text can now have metadata
• [7] DLQMM265 scroll past first page
• [8] UWNHC4AA redo y computations
• [9] MGOQ5XAV start uppercasing globals
• [10] XNFTJHC4 split keyboard handling between Text and Drawing
• [11] IYW7X3WL left/right cursor movement, deleting characters
• [12] 4C375P53 this is a bit clearer
• [13] AVQ5MC5D finish uppercasing all globals
• [14] 2ZYV7D3W handle tab characters
• [15] BULPIBEG beginnings of a module for the text editor
• [16] HYEAFRZ2 split mouse_pressed events between Text and Drawing
• [*] OTIBCAUJ love2d scaffold

Change contents

• replacement in text.lua at line 42
  [3.1642]→[3.1642:1746](∅→∅)
  − love.graphics.setColor(0.75,0.75,0.75)

  − love.graphics.line(line_width, 0, line_width, Screen_height)
  [3.1642]

  [4.109]
  + --? love.graphics.setColor(0.75,0.75,0.75)

  + --? love.graphics.line(line_width, 0, line_width, Screen_height)
• replacement in text.lua at line 122
  [4.1365]→[4.1365:1415](∅→∅)
  − Cursor_pos = #Lines[Cursor_line].data+1
  [4.1365]

  [4.1415]
  + Cursor_pos = utf8.len(Lines[Cursor_line].data) + 1
• replacement in text.lua at line 132
  [4.1538]→[4.1538:1589](∅→∅)
  − if Cursor_pos <= #Lines[Cursor_line].data then
  [4.1538]

  [4.1589]
  + if Cursor_pos <= utf8.len(Lines[Cursor_line].data) then
• replacement in text.lua at line 151
  [4.2002]→[4.2002:2046](∅→∅)
  − Cursor_pos = #Lines[Cursor_line].data+1
  [4.2002]

  [4.2046]
  + Cursor_pos = utf8.len(Lines[Cursor_line].data) + 1
• replacement in text.lua at line 179
  [4.3066]→[4.3066:3117](∅→∅)
  − if Cursor_pos <= #Lines[Cursor_line].data then
  [4.3066]

  [4.3117]
  + if Cursor_pos <= utf8.len(Lines[Cursor_line].data) then
• replacement in text.lua at line 282
  [4.553]→[4.553:598](∅→∅)
  − local max_x = Text.cursor_x(line, #line+1)
  [4.553]

  [4.598]
  + local len = utf8.len(line)

  + local max_x = Text.cursor_x(line, len+1)
• replacement in text.lua at line 285
  [4.618]→[4.618:637](∅→∅)
  − return #line+1
  [4.618]

  [4.637]
  + return len+1
• replacement in text.lua at line 293
  [4.745]→[4.745:778](∅→∅)
  − local left, right = 1, #line+1
  [4.745]

  [4.360]
  + local left, right = 1, len+1
• replacement in main.lua at line 47
  [4.148]→[2.3:69](∅→∅)
  − Cursor_pos = #Lines[Cursor_line].data+1 -- in Unicode codepoints
  [4.148]

  [4.1238]
  + Cursor_pos = 1 -- in Unicode codepoints
• replacement in main.lua at line 136
  [4.213]→[3.3298:3452](∅→∅)
  − y = Text.draw(line, 100, line_index, Cursor_line, Cursor_pos)

  − --? y = Text.draw(line, Drawing_width, line_index, Cursor_line, Cursor_pos)
  [4.213]

  [4.56]
  + --? y = Text.draw(line, 100, line_index, Cursor_line, Cursor_pos)

  + y = Text.draw(line, Drawing_width, line_index, Cursor_line, Cursor_pos)