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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 <AK/String.h>
#include <AK/NonnullOwnPtrVector.h>
#include <AK/Vector.h>
#include <LibVT/Position.h>
namespace VT {
class TerminalClient {
public:
virtual ~TerminalClient() {}
virtual void beep() = 0;
virtual void set_window_title(const StringView&) = 0;
virtual void terminal_did_resize(u16 columns, u16 rows) = 0;
virtual void terminal_history_changed() = 0;
virtual void emit_char(u8) = 0;
};
struct Attribute {
Attribute() { reset(); }
static const u8 default_foreground_color = 7;
static const u8 default_background_color = 0;
void reset()
{
foreground_color = default_foreground_color;
background_color = default_background_color;
flags = Flags::NoAttributes;
}
u8 foreground_color;
u8 background_color;
enum Flags : u8 {
NoAttributes = 0x00,
Bold = 0x01,
Italic = 0x02,
Underline = 0x04,
Negative = 0x08,
Blink = 0x10,
Touched = 0x20,
};
bool is_untouched() const { return !(flags & Touched); }
// TODO: it would be really nice if we had a helper for enums that
// exposed bit ops for class enums...
u8 flags = Flags::NoAttributes;
bool operator==(const Attribute& other) const
{
return foreground_color == other.foreground_color && background_color == other.background_color && flags == other.flags;
}
bool operator!=(const Attribute& other) const
{
return !(*this == other);
}
};
class Terminal {
public:
explicit Terminal(TerminalClient&);
~Terminal();
bool m_need_full_flush { false };
void invalidate_cursor();
void on_char(u8);
void clear();
void set_size(u16 columns, u16 rows);
u16 columns() const { return m_columns; }
u16 rows() const { return m_rows; }
u16 cursor_column() const { return m_cursor_column; }
u16 cursor_row() const { return m_cursor_row; }
struct Line {
explicit Line(u16 columns);
~Line();
void clear(Attribute);
bool has_only_one_background_color() const;
void set_length(u16);
StringView text() const { return { characters, m_length }; }
u8* characters { nullptr };
Attribute* attributes { nullptr };
bool dirty { false };
u16 m_length { 0 };
};
Line& line(size_t index)
{
ASSERT(index < m_rows);
return m_lines[index];
}
const Line& line(size_t index) const
{
ASSERT(index < m_rows);
return m_lines[index];
}
size_t max_history_size() const { return 500; }
const NonnullOwnPtrVector<Line>& history() const { return m_history; }
void inject_string(const StringView&);
private:
typedef Vector<unsigned, 4> ParamVector;
void scroll_up();
void scroll_down();
void newline();
void set_cursor(unsigned row, unsigned column);
void put_character_at(unsigned row, unsigned column, u8 ch);
void set_window_title(const String&);
void unimplemented_escape();
void unimplemented_xterm_escape();
void emit_string(const StringView&);
void alter_mode(bool should_set, bool question_param, const ParamVector&);
void CUU(const ParamVector&);
void CUD(const ParamVector&);
void CUF(const ParamVector&);
void CUB(const ParamVector&);
void CUP(const ParamVector&);
void ED(const ParamVector&);
void EL(const ParamVector&);
void escape$M(const ParamVector&);
void escape$P(const ParamVector&);
void escape$G(const ParamVector&);
void escape$X(const ParamVector&);
void escape$b(const ParamVector&);
void escape$d(const ParamVector&);
void SGR(const ParamVector&);
void escape$s(const ParamVector&);
void escape$u(const ParamVector&);
void escape$t(const ParamVector&);
void DECSTBM(const ParamVector&);
void escape$S(const ParamVector&);
void escape$T(const ParamVector&);
void escape$L(const ParamVector&);
void RM(bool question_param, const ParamVector&);
void SM(bool question_param, const ParamVector&);
void DA(const ParamVector&);
void HVP(const ParamVector&);
void NEL();
void IND();
void RI();
TerminalClient& m_client;
NonnullOwnPtrVector<Line> m_history;
NonnullOwnPtrVector<Line> m_lines;
size_t m_scroll_region_top { 0 };
size_t m_scroll_region_bottom { 0 };
u16 m_columns { 1 };
u16 m_rows { 1 };
u16 m_cursor_row { 0 };
u16 m_cursor_column { 0 };
u16 m_saved_cursor_row { 0 };
u16 m_saved_cursor_column { 0 };
bool m_swallow_current { false };
bool m_stomp { false };
Attribute m_current_attribute;
void execute_escape_sequence(u8 final);
void execute_xterm_command();
void execute_hashtag(u8);
enum EscapeState {
Normal,
GotEscape,
ExpectParameter,
ExpectIntermediate,
ExpectFinal,
ExpectHashtagDigit,
ExpectXtermParameter1,
ExpectXtermParameter2,
ExpectXtermFinal,
};
EscapeState m_escape_state { Normal };
Vector<u8> m_parameters;
Vector<u8> m_intermediates;
Vector<u8> m_xterm_param1;
Vector<u8> m_xterm_param2;
Vector<bool> m_horizontal_tabs;
u8 m_final { 0 };
u8 m_last_char { 0 };
};
}
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