commit cde8ff63e2b90ee304bc2e86d9d5e7e20068c79b
author Julio B <julio.bacel@gmail.com> Thu Feb 06 20:31:27 2025 +0100
committer Christian Brabandt <cb@256bit.org> Thu Feb 06 20:31:27 2025 +0100
tree 3af3e9ebcea3d29b3c5468888556d3aabad848dd
parent f50d5364d790619a3b982a3ad3658b5a10daf511

patch 9.1.1078: Terminal ansi colors off by one after tgc reset

Problem:  Terminal ansi colors off by one after tgc reset
Solution: Set the correct index for libvterm palette,
          revert parts in libvterm/src/pen.c that deviated from upstream
          (Julio B)

fixes: #16568
closes: #16573
related: Vim patch v8.2.0804

Co-authored-by: Christian Brabandt <cb@256bit.org>
Signed-off-by: Julio B <julio.bacel@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/test_terminal.vim

diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 5343efb..b53f0cd 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -2149,6 +2149,30 @@
   exe buf . 'bwipe'
 endfunc
 
+func Test_terminal_ansicolors_default_reset_tgc()
+  CheckFeature termguicolors
+  CheckRunVimInTerminal
+
+  let $PS1="$ "
+  let buf = RunVimInTerminal('-c "term sh"', {'rows': 12})
+  call TermWait(buf)
+  " Wait for the shell to display a prompt
+  call WaitForAssert({-> assert_notequal('', term_getline(buf, 1))})
+
+  call term_sendkeys(buf, "printf '\\033[0;30;41mhello world\\033[0m\\n'\<CR>")
+  call WaitForAssert({-> assert_match('hello world', term_getline(buf, 2))})
+  call term_sendkeys(buf, "\<C-W>:set notgc\<CR>")
+  call term_sendkeys(buf, "printf '\\033[0;30;41mhello world\\033[0m\\n'\<CR>")
+  call WaitForAssert({-> assert_match('hello world', term_getline(buf, 4))})
+
+  call VerifyScreenDump(buf, 'Test_terminal_ansi_reset_tgc', {})
+
+  call term_sendkeys(buf, "exit\<CR>")
+  call TermWait(buf)
+  call StopVimInTerminal(buf)
+  unlet! $PS1
+endfunc
+
 let s:test_colors = [
 	\ '#616e64', '#0d0a79',
 	\ '#6d610d', '#0a7373',