Kernel: Move TTY-related files into Kernel/TTY/.

Kernel/TTY/VirtualConsole.h

@@ -0,0 +1,81 @@
+#pragma once
+
+#include <Kernel/TTY/TTY.h>
+#include "KeyboardDevice.h"
+#include "Console.h"
+
+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();
+
+private:
+    // ^KeyboardClient
+    virtual void on_key_pressed(KeyboardDevice::Event) override;
+
+    // ^ConsoleImplementation
+    virtual void on_sysconsole_receive(byte) override;
+
+    // ^TTY
+    virtual ssize_t on_tty_write(const byte*, ssize_t) override;
+    virtual String tty_name() const override;
+
+    // ^CharacterDevice
+    virtual const char* class_name() const override { return "VirtualConsole"; }
+
+    void set_active(bool);
+    void on_char(byte);
+
+    void get_vga_cursor(byte& row, byte& column);
+    void flush_vga_cursor();
+
+    byte* m_buffer;
+    unsigned m_index;
+    bool m_active { false };
+
+    void scroll_up();
+    void set_cursor(unsigned row, unsigned column);
+    void put_character_at(unsigned row, unsigned column, byte 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();
+
+    byte m_cursor_row { 0 };
+    byte m_cursor_column { 0 };
+    byte m_saved_cursor_row { 0 };
+    byte m_saved_cursor_column { 0 };
+    byte m_current_attribute { 0x07 };
+
+    void clear_vga_row(word row);
+    void set_vga_start_row(word row);
+    word m_vga_start_row { 0 };
+    word m_current_vga_start_address { 0 };
+    byte* m_current_vga_window { nullptr };
+
+    void execute_escape_sequence(byte final);
+
+    enum EscapeState {
+        Normal,
+        ExpectBracket,
+        ExpectParameter,
+        ExpectIntermediate,
+        ExpectFinal,
+    };
+    EscapeState m_escape_state { Normal };
+    Vector<byte> m_parameters;
+    Vector<byte> m_intermediates;
+    byte* m_horizontal_tabs { nullptr };
+};