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fix(tui): skip TUI in ui_rgb_attached (#29096)

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The ui_rgb_attached function determines if any UI is attached which
supports RGB (truecolor). We determine if the TUI supports RGB via the
'termguicolors' option which is checked at the beginning of this
function. If the TUI does not support RGB ('termguicolors' is unset), we
check to see if any _other_ UI is attached which supports RGB.

Normally, the TUI's "rgb" flag and the 'termguicolors' option are the
same. However, they may differ during startup when the "rgb" flag is set
by tui/tui.c to indicate to the core that the terminal emulator supports
truecolor. The 'termguicolors' option is not actually set until
_defaults.lua runs.

(cherry picked from commit 0231265c8c)
This commit is contained in:
Gregory Anders
2024-06-12 19:55:28 -05:00
committed by github-actions[bot]
parent 0608444447
commit a784b901be
1 changed files with 6 additions and 2 deletions
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8
src/nvim/ui.c
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@@ -144,11 +144,15 @@ void ui_free_all_mem(void)
/// Returns true if any `rgb=true` UI is attached.
bool ui_rgb_attached(void)
{
if (!headless_mode && p_tgc) {
if (p_tgc) {
return true;
}
for (size_t i = 0; i < ui_count; i++) {
if (uis[i]->rgb) {
// We do not consider the TUI in this loop because we already checked for 'termguicolors' at the
// beginning of this function. In this loop, we are checking to see if any _other_ UIs which
// support RGB are attached.
bool tui = uis[i]->stdin_tty || uis[i]->stdout_tty;
if (!tui && uis[i]->rgb) {
return true;
}
}