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Kernel: Fix TTY echo and canonical flag behaviour

This commit is contained in:
Bananymous 2023-04-05 11:35:19 +03:00
parent b00dd8d68d
commit 5db4e5b4d5
1 changed files with 124 additions and 29 deletions
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157
kernel/kernel/Terminal/TTY.cpp
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@ -72,19 +72,40 @@ namespace Kernel
if (event.released())
return;
const char* ansi = Input::key_event_to_utf8(event);
bool flush = false;
const char* ansi_c_str = Input::key_event_to_utf8(event);
if (event.ctrl())
{
ansi = nullptr;
ansi_c_str = nullptr;
switch (event.key)
{
case Input::Key::D:
flush = true;
break;
default:
break;
case Input::Key::A: ansi_c_str = "\x01"; break;
case Input::Key::B: ansi_c_str = "\x02"; break;
case Input::Key::C: ansi_c_str = "\x03"; break;
case Input::Key::D: ansi_c_str = "\x04"; break;
case Input::Key::E: ansi_c_str = "\x05"; break;
case Input::Key::F: ansi_c_str = "\x06"; break;
case Input::Key::G: ansi_c_str = "\x07"; break;
case Input::Key::H: ansi_c_str = "\x08"; break;
case Input::Key::I: ansi_c_str = "\x09"; break;
case Input::Key::J: ansi_c_str = "\x0A"; break;
case Input::Key::K: ansi_c_str = "\x0B"; break;
case Input::Key::L: ansi_c_str = "\x0C"; break;
case Input::Key::M: ansi_c_str = "\x0D"; break;
case Input::Key::N: ansi_c_str = "\x0E"; break;
case Input::Key::O: ansi_c_str = "\x0F"; break;
case Input::Key::P: ansi_c_str = "\x10"; break;
case Input::Key::Q: ansi_c_str = "\x11"; break;
case Input::Key::R: ansi_c_str = "\x12"; break;
case Input::Key::S: ansi_c_str = "\x13"; break;
case Input::Key::T: ansi_c_str = "\x14"; break;
case Input::Key::U: ansi_c_str = "\x15"; break;
case Input::Key::V: ansi_c_str = "\x16"; break;
case Input::Key::W: ansi_c_str = "\x17"; break;
case Input::Key::X: ansi_c_str = "\x18"; break;
case Input::Key::Y: ansi_c_str = "\x19"; break;
case Input::Key::Z: ansi_c_str = "\x1A"; break;
default: break;
}
}
else
@ -93,37 +114,107 @@ namespace Kernel
{
case Input::Key::Enter:
case Input::Key::NumpadEnter:
flush = true;
ansi = "\n";
ansi_c_str = "\n";
break;
case Input::Key::Backspace:
ansi = nullptr;
do_backspace();
ansi_c_str = "\b";
break;
case Input::Key::ArrowUp:
ansi_c_str = "\e[A";
break;
case Input::Key::ArrowDown:
ansi_c_str = "\e[B";
break;
case Input::Key::ArrowRight:
ansi_c_str = "\e[C";
break;
case Input::Key::ArrowLeft:
ansi_c_str = "\e[D";
break;
default:
break;
}
}
if (!m_termios.canonical)
flush = true;
const uint8_t* ansi = (const uint8_t*)ansi_c_str;
if (ansi != nullptr)
bool eof = ansi && (
ansi[0] == '\x04' || // ^D
ansi[0] == '\n' // \n
);
if (ansi && m_termios.canonical)
{
for (size_t i = 0; ansi[i]; i++)
// EOF from ^D
if (ansi[0] == '\x04')
ansi = nullptr;
else if (ansi[0] == '\b')
{
if (m_termios.echo)
putchar(ansi[i]);
if (m_output.bytes == m_output.buffer.size())
{
dprintln("TTY buffer full");
continue;
}
m_output.buffer[m_output.bytes++] = ansi[i];
ansi = nullptr;
do_backspace();
}
}
if (flush)
if (ansi == nullptr)
return;
for (size_t i = 0; ansi[i]; i++)
{
if (m_output.bytes >= m_output.buffer.size())
{
dprintln("TTY buffer full");
break;
}
m_output.buffer[m_output.bytes++] = ansi[i];
}
if (m_termios.echo)
{
for (size_t i = 0; ansi[i]; i++)
{
if (ansi[i] <= 26 && ansi[i] != 10)
{
putchar('^');
putchar('A' + ansi[i] - 1);
}
else if (ansi[i] == 27)
{
putchar('^');
putchar('[');
}
else if (ansi[i] == 28)
{
putchar('^');
putchar('\\');
}
else if (ansi[i] == 29)
{
putchar('^');
putchar(']');
}
else if (ansi[i] == 30)
{
putchar('^');
putchar('^');
}
else if (ansi[i] == 31)
{
putchar('^');
putchar('_');
}
else if (ansi[i] == 127)
{
putchar('^');
putchar('?');
}
else
{
putchar(ansi[i]);
}
}
}
if (eof || !m_termios.canonical)
{
m_output.flush = true;
m_output.semaphore.unblock();
@ -142,7 +233,7 @@ namespace Kernel
auto print_backspace =
[this]
{
if (m_column > 0)
if (m_termios.echo && m_column > 0)
{
m_column--;
putchar_at(' ', m_column, m_row);
@ -152,8 +243,10 @@ namespace Kernel
if (m_output.bytes > 0)
{
uint8_t last = m_output.buffer[m_output.bytes - 1];
// Multibyte UTF8
if ((m_output.buffer[m_output.bytes - 1] & 0xC0) == 0x80)
if ((last & 0xC0) == 0x80)
{
// NOTE: this should be valid UTF8 since keyboard input already 'validates' it
while ((m_output.buffer[m_output.bytes - 1] & 0xC0) == 0x80)
@ -161,12 +254,14 @@ namespace Kernel
ASSERT(m_output.bytes > 0);
m_output.bytes--;
}
ASSERT(m_output.bytes > 0);
m_output.bytes--;
print_backspace();
}
// Control sequence
else if (m_output.bytes >= 2 && m_output.buffer[m_output.bytes - 2] == '\e')
// Caret notation
else if (last < 32 || last == 127)
{
m_output.bytes -= 2;
m_output.bytes--;
print_backspace();
print_backspace();
}
@ -184,7 +279,7 @@ namespace Kernel
static uint32_t last_x = -1;
static uint32_t last_y = -1;
if (last_x != uint32_t(-1) && last_y != uint32_t(-1))
render_from_buffer(last_x, last_y); // Hacky way to clear previous cursor in graphics mode :D
render_from_buffer(last_x, last_y);
m_terminal_driver->set_cursor_position(x, y);
last_x = m_column = x;
last_y = m_row = y;