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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <Kernel/Devices/KeyboardDevice.h>
#include <Kernel/TTY/TTY.h>
#include <LibBareMetal/Output/Console.h>
namespace Kernel {
class VirtualConsole final : public TTY
, public KeyboardClient
, public ConsoleImplementation {
AK_MAKE_ETERNAL
public:
enum InitialContents {
Cleared,
AdoptCurrentVGABuffer
};
VirtualConsole(unsigned index, InitialContents = Cleared);
virtual ~VirtualConsole() override;
static void switch_to(unsigned);
static void initialize();
bool is_graphical() { return m_graphical; }
void set_graphical(bool graphical) { m_graphical = graphical; }
private:
// ^KeyboardClient
virtual void on_key_pressed(KeyboardDevice::Event) override;
// ^ConsoleImplementation
virtual void on_sysconsole_receive(u8) override;
// ^TTY
virtual ssize_t on_tty_write(const u8*, ssize_t) override;
virtual StringView tty_name() const override;
virtual void echo(u8) override;
// ^CharacterDevice
virtual const char* class_name() const override { return "VirtualConsole"; }
void set_active(bool);
void on_char(u8);
void get_vga_cursor(u8& row, u8& column);
void flush_vga_cursor();
u8* m_buffer;
unsigned m_index;
bool m_active { false };
bool m_graphical { false };
void scroll_up();
void set_cursor(unsigned row, unsigned column);
void put_character_at(unsigned row, unsigned column, u8 ch);
void escape$A(const Vector<unsigned>&);
void escape$D(const Vector<unsigned>&);
void escape$H(const Vector<unsigned>&);
void escape$J(const Vector<unsigned>&);
void escape$m(const Vector<unsigned>&);
void escape$s(const Vector<unsigned>&);
void escape$u(const Vector<unsigned>&);
void clear();
u8 m_cursor_row { 0 };
u8 m_cursor_column { 0 };
u8 m_saved_cursor_row { 0 };
u8 m_saved_cursor_column { 0 };
u8 m_current_attribute { 0x07 };
void clear_vga_row(u16 row);
void set_vga_start_row(u16 row);
u16 m_vga_start_row { 0 };
u16 m_current_vga_start_address { 0 };
u8* m_current_vga_window { nullptr };
void execute_escape_sequence(u8 final);
enum EscapeState {
Normal,
ExpectBracket,
ExpectParameter,
ExpectIntermediate,
ExpectFinal,
};
EscapeState m_escape_state { Normal };
Vector<u8> m_parameters;
Vector<u8> m_intermediates;
u8* m_horizontal_tabs { nullptr };
char m_tty_name[32];
};
}
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