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LibVT: Fix out-of bounds line insert

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Unless DECOM mode is enabled, the cursor positions are measured from the
top left corner of the screen. We counted from the top margin, causing
line inserts in `vim` to go out-of-bounds and crash the terminal.
This commit is contained in:
Daniel Bertalan 2021-05-24 19:14:34 +02:00 • committed by Ali Mohammad Pur
parent 6465f87827
commit 0c6f019285
1 changed files with 2 additions and 2 deletions
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4
Userland/Libraries/LibVT/Terminal.cpp
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@ -608,7 +608,7 @@ void Terminal::IL(Parameters params)
count = params[0];
invalidate_cursor();
for (; count > 0; --count) {
active_buffer().insert(cursor_row() + m_scroll_region_top, make<Line>(m_columns));
active_buffer().insert(cursor_row(), make<Line>(m_columns));
if (m_scroll_region_bottom + 1 < active_buffer().size())
active_buffer().remove(m_scroll_region_bottom + 1);
else
@ -640,7 +640,7 @@ void Terminal::DL(Parameters params)
count = min(count, max_count);
for (int c = count; c > 0; --c) {
active_buffer().remove(cursor_row() + m_scroll_region_top);
active_buffer().remove(cursor_row());
if (m_scroll_region_bottom < active_buffer().size())
active_buffer().insert(m_scroll_region_bottom, make<Line>(m_columns));
else