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Shell: Ensure that the cursor starts on a new line

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And print an indicator when it doesn't, a la zsh.
This commit is contained in:
AnotherTest 2020-08-17 18:05:50 +04:30 • committed by Andreas Kling
parent c96b9fdb0a
commit 14a54a72fa
Notes: sideshowbarker 2024-07-19 03:29:30 +09:00
2 changed files with 25 additions and 0 deletions
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24
Shell/Shell.cpp
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@ -1087,9 +1087,33 @@ Vector<Line::CompletionSuggestion> Shell::complete_option(const String& program_
return suggestions;
}
void Shell::bring_cursor_to_beginning_of_a_line() const
{
struct winsize ws;
if (editor) {
ws = editor->terminal_size();
} else {
if (ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) < 0) {
// Very annoying assumptions.
ws.ws_col = 80;
ws.ws_row = 25;
}
}
Line::VT::apply_style(Line::Style { Line::Style::Background(Line::Style::XtermColor::Cyan), Line::Style::Foreground(Line::Style::XtermColor::Black) });
putc('%', stderr);
Line::VT::apply_style(Line::Style::reset_style());
for (auto i = 2; i < ws.ws_col; ++i)
putc(' ', stderr);
putc('\r', stderr);
}
bool Shell::read_single_line()
{
restore_ios();
bring_cursor_to_beginning_of_a_line();
auto line_result = editor->get_line(prompt());
if (line_result.is_error()) {