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Terminal: Implement scroll region termcodes

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This commit is contained in:
Christopher Dumas 2019-05-28 15:40:44 -07:00 • committed by Andreas Kling
parent ab004f73bf
commit ce15a4021d
3 changed files with 80 additions and 6 deletions
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77
Applications/Terminal/Terminal.cpp
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@ -254,7 +254,13 @@ void Terminal::escape$r(const ParamVector& params)
top = params[0];
if (params.size() >= 2)
bottom = params[1];
dbgprintf("FIXME: escape$r: Set scrolling region: %u-%u\n", top, bottom);
if ((bottom - top) < 2 || bottom > m_rows) {
dbgprintf("Error: escape: scrolling region invalid: %u-%u\n", top, bottom);
return;
}
m_scroll_region_top = top;
m_scroll_region_bottom = bottom;
set_cursor(0, 0);
}
void Terminal::escape$H(const ParamVector& params)
@ -415,6 +421,42 @@ void Terminal::escape$J(const ParamVector& params)
}
}
void Terminal::escape$S(const ParamVector& params)
{
int count = 1;
if (params.size() >= 1)
count = params[0];
dbgprintf("Terminal: Scrolling up %d lines\n", count);
for (word i = 0; i < count; i++)
scroll_up();
}
void Terminal::escape$T(const ParamVector& params)
{
int count = 1;
if (params.size() >= 1)
count = params[0];
dbgprintf("Terminal: Scrolling down %d lines\n", count);
for (word i = 0; i < count; i++)
scroll_down();
}
void Terminal::escape$L(const ParamVector& params)
{
int count = 1;
if (params.size() >= 1)
count = params[0];
dbgprintf("Terminal: Adding %d lines below cursor (at line %d)\n", count, m_cursor_row);
invalidate_cursor();
for (word row = m_rows; row > m_cursor_row; --row)
m_lines[row] = m_lines[row - 1];
m_lines[m_cursor_row] = new Line(m_columns);
++m_rows_to_scroll_backing_store;
m_need_full_flush = true;
}
void Terminal::escape$M(const ParamVector& params)
{
int count = 1;
@ -430,8 +472,11 @@ void Terminal::escape$M(const ParamVector& params)
count = min(count, max_count);
dbgprintf("Delete %d line(s) starting from %d\n", count, m_cursor_row);
// FIXME: Implement.
ASSERT_NOT_REACHED();
for (word i = 0; i < count; ++i)
delete m_lines[m_cursor_row + i];
for (word row = m_cursor_row + count + 1; row < rows(); ++row)
m_lines[row - 1] = m_lines[row];
m_lines[m_rows - 1]->clear(m_current_attribute);
}
void Terminal::execute_xterm_command()
@ -480,6 +525,9 @@ void Terminal::execute_escape_sequence(byte final)
case 'J': escape$J(params); break;
case 'K': escape$K(params); break;
case 'M': escape$M(params); break;
case 'S': escape$S(params); break;
case 'T': escape$T(params); break;
case 'L': escape$L(params); break;
case 'G': escape$G(params); break;
case 'X': escape$X(params); break;
case 'd': escape$d(params); break;
@ -512,14 +560,25 @@ void Terminal::scroll_up()
{
// NOTE: We have to invalidate the cursor first.
invalidate_cursor();
delete m_lines[0];
for (word row = 1; row < rows(); ++row)
delete m_lines[m_scroll_region_top];
for (word row = m_scroll_region_top + 1; row < m_scroll_region_bottom; ++row)
m_lines[row - 1] = m_lines[row];
m_lines[m_rows - 1] = new Line(m_columns);
m_lines[m_scroll_region_bottom - 1] = new Line(m_columns);
++m_rows_to_scroll_backing_store;
m_need_full_flush = true;
}
void Terminal::scroll_down()
{
// NOTE: We have to invalidate the cursor first.
invalidate_cursor();
for (word row = m_scroll_region_bottom; row > m_scroll_region_top; --row)
m_lines[row] = m_lines[row - 1];
m_lines[m_scroll_region_top] = new Line(m_columns);
--m_rows_to_scroll_backing_store;
m_need_full_flush = true;
}
void Terminal::set_cursor(unsigned a_row, unsigned a_column)
{
unsigned row = min(a_row, m_rows - 1u);
@ -718,6 +777,9 @@ void Terminal::set_size(word columns, word rows)
m_columns = columns;
m_rows = rows;
m_scroll_region_top = 0;
m_scroll_region_bottom = rows;
m_cursor_row = 0;
m_cursor_column = 0;
m_saved_cursor_row = 0;
@ -825,6 +887,9 @@ void Terminal::keydown_event(GKeyEvent& event)
case KeyCode::Key_End:
write(m_ptm_fd, "\033[F", 3);
break;
case KeyCode::Key_RightShift:
dbgprintf("Terminal: A wild Right Shift key is pressed. Not handled.\n");
break;
default:
write(m_ptm_fd, &ch, 1);
break;