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screen: Support tmux escape sequences

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Tmux has support for wrapping arbitrary escape sequences inside

```
\ePtmux;\e%s\e\\
```

Since this ends like the screen title escape, we just reuse that.

Characteristically, this is basically undocumented, but we already use
it in e.g. fish_vi_cursor.
This commit is contained in:
Fabian Homborg 2021-08-30 16:55:14 +02:00
parent d62e22dcc0
commit c02cc110e0
1 changed files with 8 additions and 1 deletions
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9
src/screen.cpp
View file

@ -101,13 +101,20 @@ static bool allow_soft_wrap() {
/// Does this look like the escape sequence for setting a screen name?
static bool is_screen_name_escape_seq(const wchar_t *code, size_t *resulting_length) {
// Tmux escapes start with `\ePtmux;` and end also in `\e\\`,
// so we can just handle them here.
static const wchar_t *tmux_seq = L"Ptmux;";
static const size_t tmux_seq_len = std::wcslen(tmux_seq);
if (code[1] != L'k') {
return false;
if (wcsncmp(&code[1], tmux_seq, tmux_seq_len) != 0) {
return false;
}
}
const wchar_t *const screen_name_end_sentinel = L"\x1B\\";
const wchar_t *screen_name_end = std::wcsstr(&code[2], screen_name_end_sentinel);
if (screen_name_end == nullptr) {
// Consider just <esc>k to be the code.
// (note: for the tmux sequence this is broken, but since we have no idea...)
*resulting_length = 2;
} else {
const wchar_t *escape_sequence_end =