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	closes #8466
closes #8664
Regression by 0d7daaad98.
- Fix length comparison.
- Fix loop(s) which iterated over all fields of array `pcc` even if it
  was not filled up (try unicode 0x9f as statusline character).
Note about the tests:
- To input unicode with more than two hex digits you can use <C-v>U...:
  a + U+fe20: a︠
  a + U+fe20 + U+fe21: a︠︡
		
	
		
			
				
	
	
		
			186 lines
		
	
	
		
			6.9 KiB
		
	
	
	
		
			Lua
		
	
	
	
	
	
			
		
		
	
	
			186 lines
		
	
	
		
			6.9 KiB
		
	
	
	
		
			Lua
		
	
	
	
	
	
local helpers = require('test.functional.helpers')(after_each)
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local Screen = require('test.functional.ui.screen')
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local clear = helpers.clear
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local command = helpers.command
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local feed = helpers.feed
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local feed_command = helpers.feed_command
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local insert = helpers.insert
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local funcs = helpers.funcs
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describe("multibyte rendering", function()
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  local screen
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  before_each(function()
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    clear()
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    screen = Screen.new(60, 6)
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    screen:attach({rgb=true})
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    screen:set_default_attr_ids({
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      [1] = {bold = true, foreground = Screen.colors.Blue1},
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      [2] = {background = Screen.colors.WebGray},
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      [3] = {background = Screen.colors.LightMagenta},
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      [4] = {bold = true},
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    })
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  end)
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  after_each(function()
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    screen:detach()
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  end)
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  it("works with composed char at start of line", function()
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    insert([[
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      ̊
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      x]])
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    feed("gg")
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     -- verify the modifier infact is alone
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    feed_command("ascii")
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    screen:expect([[
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      ^ ̊                                                           |
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      x                                                           |
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      {1:~                                                           }|
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      {1:~                                                           }|
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      {1:~                                                           }|
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      < ̊> 778, Hex 030a, Octal 1412                               |
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    ]])
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    -- a char inserted before will spontaneously merge with it
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    feed("ia<esc>")
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    feed_command("ascii")
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    screen:expect([[
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      ^å                                                           |
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      x                                                           |
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      {1:~                                                           }|
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      {1:~                                                           }|
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      {1:~                                                           }|
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      <a>  97,  Hex 61,  Octal 141 < ̊> 778, Hex 030a, Octal 1412  |
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    ]])
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  end)
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  it('works with doublewidth char at end of line', function()
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    feed('58a <esc>a馬<esc>')
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    screen:expect([[
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                                                                ^馬|
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      {1:~                                                           }|
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      {1:~                                                           }|
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      {1:~                                                           }|
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      {1:~                                                           }|
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                                                                  |
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    ]])
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    feed('i <esc>')
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    screen:expect([[
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                                                                ^ {1:>}|
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      馬                                                          |
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      {1:~                                                           }|
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      {1:~                                                           }|
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      {1:~                                                           }|
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                                                                  |
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    ]])
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    feed('l')
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    screen:expect([[
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                                                                 {1:>}|
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      ^馬                                                          |
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      {1:~                                                           }|
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      {1:~                                                           }|
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      {1:~                                                           }|
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                                                                  |
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    ]])
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  end)
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  it('clears left half of double-width char when right half is overdrawn', function()
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    feed('o-馬<esc>ggiab ')
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    screen:expect([[
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      ab ^                                                         |
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      -馬                                                         |
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      {1:~                                                           }|
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      {1:~                                                           }|
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      {1:~                                                           }|
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      {4:-- INSERT --}                                                |
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    ]])
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    -- check double-with char is temporarily hidden when overlapped
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    funcs.complete(4, {'xx', 'yy'})
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    screen:expect([[
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      ab xx^                                                       |
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      - {2: xx             }                                          |
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      {1:~ }{3: yy             }{1:                                          }|
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      {1:~                                                           }|
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      {1:~                                                           }|
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      {4:-- INSERT --}                                                |
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    ]])
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    -- check it is properly restored
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    feed('z')
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    screen:expect([[
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      ab xxz^                                                      |
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      -馬                                                         |
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      {1:~                                                           }|
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      {1:~                                                           }|
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      {1:~                                                           }|
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      {4:-- INSERT --}                                                |
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    ]])
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  end)
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end)
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describe('multibyte rendering: statusline', function()
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  local screen
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  before_each(function()
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    clear()
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    screen = Screen.new(40, 4)
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    screen:attach()
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    command('set laststatus=2')
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  end)
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  after_each(function()
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    screen:detach()
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  end)
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  it('last char shows (multibyte)', function()
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    command('set statusline=你好')
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    screen:expect([[
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    ^                                        |
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    ~                                       |
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    你好                                    |
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                                            |
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    ]])
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  end)
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  it('last char shows (single byte)', function()
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    command('set statusline=abc')
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    screen:expect([[
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    ^                                        |
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    ~                                       |
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    abc                                     |
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                                            |
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    ]])
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  end)
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  it('unicode control points', function()
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    command('set statusline=')
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    screen:expect([[
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    ^                                        |
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    ~                                       |
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    <9f>                                    |
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                                            |
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    ]])
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  end)
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  it('MAX_MCO (6) unicode combination points', function()
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    command('set statusline=o̸⃯ᷰ⃐⃧⃝')
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    -- o + U+1DF0 + U+20EF + U+0338 + U+20D0 + U+20E7 + U+20DD
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    screen:expect([[
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    ^                                        |
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    ~                                       |
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    o̸⃯ᷰ⃐⃧⃝                                       |
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                                            |
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    ]])
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  end)
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  it('non-printable followed by MAX_MCO unicode combination points', function()
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    command('set statusline≠⃯ᷰ⃐⃧⃝')
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    -- U+9F + U+1DF0 + U+20EF + U+0338 + U+20D0 + U+20E7 + U+20DD
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    screen:expect([[
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    ^                                        |
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    ~                                       |
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    <9f><1df0><20ef><0338><20d0><20e7><20dd>|
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                                            |
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    ]])
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  end)
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end)
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