mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-01-08 20:32:56 +03:00
79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/CircularDeque.h>
|
|
#include <AK/WeakPtr.h>
|
|
#include <Kernel/Devices/CharacterDevice.h>
|
|
#include <Kernel/DoubleBuffer.h>
|
|
#include <Kernel/ProcessGroup.h>
|
|
#include <Kernel/UnixTypes.h>
|
|
|
|
#define TTY_BUFFER_SIZE 1024
|
|
|
|
namespace Kernel {
|
|
|
|
class TTY : public CharacterDevice {
|
|
public:
|
|
virtual ~TTY() override;
|
|
|
|
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
|
|
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
|
|
virtual bool can_read(const OpenFileDescription&, size_t) const override;
|
|
virtual bool can_write(const OpenFileDescription&, size_t) const override;
|
|
virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override final;
|
|
virtual ErrorOr<NonnullOwnPtr<KString>> pseudo_path(const OpenFileDescription&) const override;
|
|
|
|
virtual KString const& tty_name() const = 0;
|
|
|
|
unsigned short rows() const { return m_rows; }
|
|
unsigned short columns() const { return m_columns; }
|
|
|
|
ProcessGroupID pgid() const
|
|
{
|
|
if (auto pg = m_pg.strong_ref())
|
|
return pg->pgid();
|
|
return 0;
|
|
}
|
|
|
|
ErrorOr<void> set_termios(const termios&);
|
|
bool should_generate_signals() const { return m_termios.c_lflag & ISIG; }
|
|
bool should_flush_on_signal() const { return !(m_termios.c_lflag & NOFLSH); }
|
|
bool should_echo_input() const { return m_termios.c_lflag & ECHO; }
|
|
bool in_canonical_mode() const { return m_termios.c_lflag & ICANON; }
|
|
|
|
void set_default_termios();
|
|
void hang_up();
|
|
|
|
protected:
|
|
virtual ErrorOr<size_t> on_tty_write(const UserOrKernelBuffer&, size_t) = 0;
|
|
void set_size(unsigned short columns, unsigned short rows);
|
|
|
|
TTY(unsigned major, unsigned minor);
|
|
void emit(u8, bool do_evaluate_block_conditions = false);
|
|
void echo_with_processing(u8);
|
|
|
|
bool can_do_backspace() const;
|
|
void do_backspace();
|
|
void erase_word();
|
|
void erase_character();
|
|
void kill_line();
|
|
void flush_input();
|
|
|
|
bool is_eol(u8) const;
|
|
bool is_eof(u8) const;
|
|
bool is_kill(u8) const;
|
|
bool is_erase(u8) const;
|
|
bool is_werase(u8) const;
|
|
|
|
void generate_signal(int signal);
|
|
|
|
int m_available_lines { 0 };
|
|
|
|
private:
|
|
// ^CharacterDevice
|
|
virtual bool is_tty() const final override { return true; }
|
|
|
|
virtual void echo(u8) = 0;
|
|
|
|
template<typename Functor>
|
|
void process_output(u8, Functor put_char);
|
|
|
|
CircularDeque<u8, TTY_BUFFER_SIZE> m_input_buffer;
|
|
// FIXME: use something like AK::Bitmap but which takes a size template parameter
|
|
u8 m_special_character_bitmask[TTY_BUFFER_SIZE / 8];
|
|
|
|
WeakPtr<Process> m_original_process_parent;
|
|
WeakPtr<ProcessGroup> m_pg;
|
|
termios m_termios;
|
|
unsigned short m_rows { 0 };
|
|
unsigned short m_columns { 0 };
|
|
};
|
|
|
|
}
|