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LibVT: Rewrap the terminal history along with the normal buffer

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Ali Mohammad Pur 2021-06-22 20:01:24 +04:30 • committed by Andreas Kling
parent 4bf14715a1
commit fcef84c461
2 changed files with 33 additions and 19 deletions
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4
Userland/Libraries/LibVT/Position.h
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@ -52,8 +52,8 @@ private:
};
struct CursorPosition {
u16 row { 0 };
u16 column { 0 };
size_t row { 0 };
size_t column { 0 };
void clamp(u16 max_row, u16 max_column)
{

48
Userland/Libraries/LibVT/Terminal.cpp
View file

@ -1502,28 +1502,42 @@ void Terminal::set_size(u16 columns, u16 rows)
return old_cursor;
};
CursorPosition cursor_tracker { cursor_row(), cursor_column() };
resize_and_rewrap(m_normal_screen_buffer, cursor_tracker);
if (m_normal_screen_buffer.size() > rows) {
if (auto extra_lines = m_normal_screen_buffer.size() - rows) {
while (extra_lines > 0) {
if (m_normal_screen_buffer.size() <= cursor_tracker.row)
break;
if (m_normal_screen_buffer.last().is_empty()) {
if (m_normal_screen_buffer[m_normal_screen_buffer.size() - 2].termination_column().has_value())
break;
--extra_lines;
m_normal_screen_buffer.take_last();
continue;
}
auto old_history_size = m_history.size();
m_history.extend(move(m_normal_screen_buffer));
CursorPosition cursor_tracker { cursor_row() + old_history_size, cursor_column() };
resize_and_rewrap(m_history, cursor_tracker);
if (auto extra_lines = m_history.size() - rows) {
while (extra_lines > 0) {
if (m_history.size() <= cursor_tracker.row)
break;
if (m_history.last().is_empty()) {
if (m_history.size() >= 2 && m_history[m_history.size() - 2].termination_column().has_value())
break;
--extra_lines;
m_history.take_last();
continue;
}
for (size_t i = 0; i < extra_lines; ++i)
m_history.append(m_normal_screen_buffer.take_first());
m_client.terminal_history_changed(extra_lines);
break;
}
}
// FIXME: This can use a more performant way to move the last N entries
// from the history into the normal buffer
m_normal_screen_buffer.ensure_capacity(rows);
while (m_normal_screen_buffer.size() < rows) {
if (!m_history.is_empty())
m_normal_screen_buffer.prepend(m_history.take_last());
else
m_normal_screen_buffer.unchecked_append(make<Line>(columns));
}
cursor_tracker.row -= m_history.size();
if (m_history.size() != old_history_size) {
m_client.terminal_history_changed(-old_history_size);
m_client.terminal_history_changed(m_history.size());
}
CursorPosition dummy_cursor_tracker {};
resize_and_rewrap(m_alternate_screen_buffer, dummy_cursor_tracker);
if (m_alternate_screen_buffer.size() > rows)