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LibLine: Only write to the standard error

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This fixes `> asdf` and allows for all sorts of stdout redirections.
This commit is contained in:
AnotherTest 2020-08-09 19:31:15 +04:30 committed by Andreas Kling
parent 5724ac8e72
commit 4409cb88c9
Notes: sideshowbarker 2024-07-19 04:07:29 +09:00 
Author: https://github.com/alimpfard
Commit: https://github.com/SerenityOS/serenity/commit/4409cb88c90
Pull-request: https://github.com/SerenityOS/serenity/pull/3058
2 changed files with 52 additions and 52 deletions
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86
Libraries/LibLine/Editor.cpp
View file

@ -65,7 +65,7 @@ Editor::~Editor()
void Editor::get_terminal_size()
{
struct winsize ws;
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) < 0) {
if (ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) < 0) {
m_num_columns = 80;
m_num_lines = 25;
} else {
@ -86,9 +86,9 @@ void Editor::add_to_history(const String& line)
void Editor::clear_line()
{
for (size_t i = 0; i < m_cursor; ++i)
fputc(0x8, stdout);
fputs("\033[K", stdout);
fflush(stdout);
fputc(0x8, stderr);
fputs("\033[K", stderr);
fflush(stderr);
m_buffer.clear();
m_cursor = 0;
m_inline_search_cursor = m_cursor;
@ -257,7 +257,7 @@ void Editor::initialize()
get_terminal_size();
if (m_configuration.operation_mode == Configuration::Unset) {
auto istty = isatty(STDIN_FILENO) && isatty(STDOUT_FILENO);
auto istty = isatty(STDIN_FILENO) && isatty(STDERR_FILENO);
if (!istty) {
m_configuration.set(Configuration::NonInteractive);
} else {
@ -340,8 +340,8 @@ auto Editor::get_line(const String& prompt) -> Result<String, Editor::Error>
if (m_finish) {
m_finish = false;
reposition_cursor(true);
printf("\n");
fflush(stdout);
fprintf(stderr, "\n");
fflush(stderr);
auto string = line();
m_buffer.clear();
m_is_editing = false;
@ -386,7 +386,7 @@ void Editor::handle_interrupt_event()
m_was_interrupted = false;
if (!m_buffer.is_empty())
printf("^C");
fprintf(stderr, "^C");
m_buffer.clear();
m_cursor = 0;
@ -537,8 +537,8 @@ void Editor::handle_read_event()
return;
}
if (m_cursor == 0) {
fputc('\a', stdout);
fflush(stdout);
fputc('\a', stderr);
fflush(stderr);
return;
}
remove_at_index(m_cursor - 1);
@ -550,8 +550,8 @@ void Editor::handle_read_event()
auto do_delete = [&] {
if (m_cursor == m_buffer.size()) {
fputc('\a', stdout);
fflush(stdout);
fputc('\a', stderr);
fflush(stderr);
return;
}
remove_at_index(m_cursor);
@ -652,7 +652,7 @@ void Editor::handle_read_event()
// 'efg...'. If it's in 'efg', it should become 'efg,.:abcd...'
// with the caret after it, which then becomes 'abcd...,.:efg'
// when alt-t is pressed a second time.
// Move to end of word under (or after) caret.
size_t cursor = m_cursor;
while (cursor < m_buffer.size() && !isalnum(m_buffer[cursor]))
@ -804,8 +804,8 @@ void Editor::handle_read_event()
m_prompt_lines_at_suggestion_initiation = num_lines();
if (m_suggestion_manager.count() == 0) {
// There are no suggestions, beep.
putchar('\a');
fflush(stdout);
fputc('\a', stderr);
fflush(stderr);
}
}
@ -928,7 +928,7 @@ void Editor::handle_read_event()
// Normally ^D. `stty eof \^n` can change it to ^N (or something else), but Serenity doesn't have `stty` yet.
// Handle it before ctrl shortcuts below and only continue if the buffer is empty, so that the editing shortcuts can take effect else.
if (code_point == m_termios.c_cc[VEOF] && m_buffer.is_empty()) {
printf("<EOF>\n");
fprintf(stderr, "<EOF>\n");
if (!m_always_refresh) {
m_input_error = Error::Eof;
finish();
@ -973,7 +973,7 @@ void Editor::handle_read_event()
}
// ^L
if (code_point == ctrl('L')) {
printf("\033[3J\033[H\033[2J"); // Clear screen.
fprintf(stderr, "\033[3J\033[H\033[2J"); // Clear screen.
VT::move_absolute(1, 1);
set_origin(1, 1);
m_refresh_needed = true;
@ -1029,7 +1029,7 @@ void Editor::handle_read_event()
// ourselves, then refresh the search editor, and then tell him not to process
// this event.
m_search_editor->register_character_input_callback(ctrl('L'), [this](auto& search_editor) {
printf("\033[3J\033[H\033[2J"); // Clear screen.
fprintf(stderr, "\033[3J\033[H\033[2J"); // Clear screen.
// refresh our own prompt
set_origin(1, 1);
@ -1051,8 +1051,8 @@ void Editor::handle_read_event()
return false;
});
printf("\n");
fflush(stdout);
fprintf(stderr, "\n");
fflush(stderr);
auto search_prompt = "\x1b[32msearch:\x1b[0m ";
auto search_string_result = m_search_editor->get_line(search_prompt);
@ -1141,8 +1141,8 @@ bool Editor::search(const StringView& phrase, bool allow_empty, bool from_beginn
}
if (last_matching_offset == -1) {
fputc('\a', stdout);
fflush(stdout);
fputc('\a', stderr);
fflush(stderr);
}
}
@ -1235,11 +1235,11 @@ void Editor::refresh_display()
// no need to refresh the entire line.
char null = 0;
m_pending_chars.append(&null, 1);
fputs((char*)m_pending_chars.data(), stdout);
fputs((char*)m_pending_chars.data(), stderr);
m_pending_chars.clear();
m_drawn_cursor = m_cursor;
m_cached_buffer_metrics = actual_rendered_string_metrics(buffer_view());
fflush(stdout);
fflush(stderr);
return;
}
}
@ -1250,7 +1250,7 @@ void Editor::refresh_display()
}
VT::move_absolute(m_origin_row, m_origin_column);
fputs(m_new_prompt.characters(), stdout);
fputs(m_new_prompt.characters(), stderr);
VT::clear_to_end_of_line();
HashMap<u32, Style> empty_styles {};
@ -1292,7 +1292,7 @@ void Editor::refresh_display()
}
builder.clear();
builder.append(Utf32View { &m_buffer[i], 1 });
fputs(builder.to_string().characters(), stdout);
fputs(builder.to_string().characters(), stderr);
}
VT::apply_style(Style::reset_style()); // don't bleed to EOL
@ -1306,7 +1306,7 @@ void Editor::refresh_display()
}
reposition_cursor();
fflush(stdout);
fflush(stderr);
}
void Editor::strip_styles(bool strip_anchored)
@ -1342,8 +1342,8 @@ void Editor::reposition_cursor(bool to_end)
void VT::move_absolute(u32 row, u32 col)
{
printf("\033[%d;%dH", row, col);
fflush(stdout);
fprintf(stderr, "\033[%d;%dH", row, col);
fflush(stderr);
}
void VT::move_relative(int row, int col)
@ -1360,9 +1360,9 @@ void VT::move_relative(int row, int col)
col = -col;
if (row > 0)
printf("\033[%d%c", row, x_op);
fprintf(stderr, "\033[%d%c", row, x_op);
if (col > 0)
printf("\033[%d%c", col, y_op);
fprintf(stderr, "\033[%d%c", col, y_op);
}
Style Editor::find_applicable_style(size_t offset) const
@ -1491,7 +1491,7 @@ String Style::to_string() const
void VT::apply_style(const Style& style, bool is_starting)
{
if (is_starting) {
printf(
fprintf(stderr,
"\033[%d;%d;%dm%s%s%s",
style.bold() ? 1 : 22,
style.underline() ? 4 : 24,
@ -1500,7 +1500,7 @@ void VT::apply_style(const Style& style, bool is_starting)
style.foreground().to_vt_escape().characters(),
style.hyperlink().to_vt_escape(true).characters());
} else {
printf("%s", style.hyperlink().to_vt_escape(false).characters());
fprintf(stderr, "%s", style.hyperlink().to_vt_escape(false).characters());
}
}
@ -1508,28 +1508,28 @@ void VT::clear_lines(size_t count_above, size_t count_below)
{
// Go down count_below lines.
if (count_below > 0)
printf("\033[%dB", (int)count_below);
fprintf(stderr, "\033[%dB", (int)count_below);
// Then clear lines going upwards.
for (size_t i = count_below + count_above; i > 0; --i)
fputs(i == 1 ? "\033[2K" : "\033[2K\033[A", stdout);
fputs(i == 1 ? "\033[2K" : "\033[2K\033[A", stderr);
}
void VT::save_cursor()
{
fputs("\033[s", stdout);
fflush(stdout);
fputs("\033[s", stderr);
fflush(stderr);
}
void VT::restore_cursor()
{
fputs("\033[u", stdout);
fflush(stdout);
fputs("\033[u", stderr);
fflush(stderr);
}
void VT::clear_to_end_of_line()
{
fputs("\033[K", stdout);
fflush(stdout);
fputs("\033[K", stderr);
fflush(stderr);
}
StringMetrics Editor::actual_rendered_string_metrics(const StringView& string) const
@ -1664,8 +1664,8 @@ Vector<size_t, 2> Editor::vt_dsr()
if (m_input_error.has_value())
return { 1, 1 };
fputs("\033[6n", stdout);
fflush(stdout);
fputs("\033[6n", stderr);
fflush(stderr);
do {
auto nread = read(0, buf + length, 16 - length);

18
Libraries/LibLine/XtermSuggestionDisplay.cpp
View file

@ -63,7 +63,7 @@ void XtermSuggestionDisplay::display(const SuggestionManager& manager)
// the suggestion list to fit in the prompt line.
auto start = max_line_count - m_prompt_lines_at_suggestion_initiation;
for (size_t i = start; i < max_line_count; ++i) {
putchar('\n');
fputc('\n', stderr);
}
lines_used += max_line_count;
longest_suggestion_length = 0;
@ -113,7 +113,7 @@ void XtermSuggestionDisplay::display(const SuggestionManager& manager)
if (next_column > m_num_columns) {
auto lines = (suggestion.text_view.length() + m_num_columns - 1) / m_num_columns;
lines_used += lines;
putchar('\n');
fputc('\n', stderr);
num_printed = 0;
}
@ -125,20 +125,20 @@ void XtermSuggestionDisplay::display(const SuggestionManager& manager)
// Only apply colour to the selection if something is *actually* added to the buffer.
if (manager.is_current_suggestion_complete() && index == manager.next_index()) {
VT::apply_style({ Style::Foreground(Style::XtermColor::Blue) });
fflush(stdout);
fflush(stderr);
}
if (spans_entire_line) {
num_printed += m_num_columns;
fprintf(stdout, "%s", suggestion.text_string.characters());
fprintf(stderr, "%s", suggestion.text_string.characters());
} else {
fprintf(stdout, "%-*s", static_cast<int>(longest_suggestion_byte_length) + 2, suggestion.text_string.characters());
fprintf(stderr, "%-*s", static_cast<int>(longest_suggestion_byte_length) + 2, suggestion.text_string.characters());
num_printed += longest_suggestion_length + 2;
}
if (manager.is_current_suggestion_complete() && index == manager.next_index()) {
VT::apply_style(Style::reset_style());
fflush(stdout);
fflush(stderr);
}
return IterationDecision::Continue;
});
@ -157,17 +157,17 @@ void XtermSuggestionDisplay::display(const SuggestionManager& manager)
if (string.length() > m_num_columns - 1) {
// This would overflow into the next line, so just don't print an indicator.
fflush(stdout);
fflush(stderr);
return;
}
VT::move_absolute(m_origin_row + lines_used, m_num_columns - string.length() - 1);
VT::apply_style({ Style::Background(Style::XtermColor::Green) });
fputs(string.characters(), stdout);
fputs(string.characters(), stderr);
VT::apply_style(Style::reset_style());
}
fflush(stdout);
fflush(stderr);
}
bool XtermSuggestionDisplay::cleanup()