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feat(ui): emit "msg_clear" event after clearing the screen (#34035)

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Problem:  ext_messages cannot tell when the screen was cleared, which is
          needed to clear visible messages. An empty message is also
          never emitted, but clears messages from the message grid.
Solution: Repurpose the "msg_clear" event to be emitted when the screen
          was cleared. Emit an empty message with the `empty` kind to
          hint to a UI to clear the cmdline area.
This commit is contained in:
luukvbaal
2025-06-27 00:27:21 +02:00
committed by GitHub
parent 6005bc68b2
commit 2b4c1127ad
11 changed files with 227 additions and 139 deletions
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12
src/nvim/eval/vars.c
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@@ -1405,10 +1405,16 @@ static void list_one_var(dictitem_T *v, const char *prefix, int *first)
static void list_one_var_a(const char *prefix, const char *name, const ptrdiff_t name_len,
const VarType type, const char *string, int *first)
{
msg_ext_set_kind("list_cmd");
if (*first) {
msg_ext_set_kind("list_cmd");
msg_start();
} else {
msg_putchar('\n');
}
// don't use msg() to avoid overwriting "v:statusmsg"
msg_start();
msg_puts(prefix);
if (*prefix != NUL) {
msg_puts(prefix);
}
if (name != NULL) { // "a:" vars don't have a name stored
msg_puts_len(name, name_len, 0, false);
}