bring a few things in sync between run and source

Dependencies

• [2] 5BMR5HRT click to the left of a line
• [3] UN7GKYV5 support hyperlinks in the source editor
• [4] LNUHQOGH start passing in Editor_state explicitly
• [5] KKMFQDR4 editing source code from within the app
• [6] UHB4GARJ left/right margin -> left/right coordinates
• [7] 4KC7I3E2 make colors easier to edit
• [8] OI4FPFIN support drawings in the source editor
• [9] ZJOSQFN6 bugfix: path munging on Windows
• [10] ILOA5BYF separate data structure for each line's cache data
• [11] TGHAJBES use line cache for drawings as well
• [12] KYNGDE2C consistent names in a few more places
• [*] 2L5MEZV3 experiment: new edit namespace

Change contents

• replacement in source_text.lua at line 1724
  [3.1068]→[3.1068:1149](∅→∅)
  − function starts_with(s, sub)

  − return s:find(sub, 1, --[[no escapes]] true) == 1
  [3.1068]

  [3.1149]
  + function starts_with(s, prefix)

  + if #s < #prefix then

  + return false

  + end

  + for i=1,#prefix do

  + if s:sub(i,i) ~= prefix:sub(i,i) then

  + return false

  + end

  + end

  + return true
• replacement in source_text.lua at line 1736
  [3.1154]→[3.1154:1253](∅→∅)
  − function ends_with(s, sub)

  − return s:reverse():find(sub:reverse(), 1, --[[no escapes]] true) == 1
  [3.1154]

  [4.147057]
  + function ends_with(s, suffix)

  + if #s < #suffix then

  + return false

  + end

  + for i=0,#suffix-1 do

  + if s:sub(#s-i,#s-i) ~= suffix:sub(#suffix-i,#suffix-i) then

  + return false

  + end

  + end

  + return true
• replacement in source_edit.lua at line 99
  [4.154970]→[4.154970:155006](∅→∅)
  − left = left,

  − right = right,
  [4.154970]

  [4.155006]
  + left = math.floor(left),

  + right = math.floor(right),
• edit in source_edit.lua at line 230
  [4.157047]

  [4.157047]
  + -- give some time for the OS to flush everything to disk

  + love.timer.sleep(0.1)
• replacement in source_edit.lua at line 237
  [4.157151]→[4.21541:21562](∅→∅)
  − --? print('press')
  [4.157151]

  [4.157217]
  + --? print('press', State.selection1.line, State.selection1.pos)
• replacement in edit.lua at line 146
  [4.2826]→[4.1851:1895](∅→∅)
  − assert(#State.lines == #State.line_cache)
  [4.1023]

  [2.988]
  + if #State.lines ~= #State.line_cache then

  + print(('line_cache is out of date; %d when it should be %d'):format(#State.line_cache, #State.lines))

  + assert(false)

  + end