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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/Noncopyable.h>
#include <AK/String.h>
#include <LibVT/XtermColors.h>
namespace VT {
struct Attribute {
Attribute() { reset(); }
static const u32 default_foreground_color = xterm_colors[7];
static const u32 default_background_color = xterm_colors[0];
void reset()
{
foreground_color = default_foreground_color;
background_color = default_background_color;
flags = Flags::NoAttributes;
}
u32 foreground_color;
u32 background_color;
u32 effective_background_color() const { return flags & Negative ? foreground_color : background_color; }
u32 effective_foreground_color() const { return flags & Negative ? background_color : foreground_color; }
String href;
String href_id;
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 Line {
AK_MAKE_NONCOPYABLE(Line);
AK_MAKE_NONMOVABLE(Line);
public:
explicit Line(u16 columns);
~Line();
void clear(Attribute);
bool has_only_one_background_color() const;
void set_length(u16);
u16 length() const { return m_length; }
u32 code_point(size_t index) const
{
if (m_utf32)
return m_code_points.as_u32[index];
return m_code_points.as_u8[index];
}
void set_code_point(size_t index, u32 code_point)
{
if (!m_utf32 && code_point & 0xffffff80u)
convert_to_utf32();
if (m_utf32)
m_code_points.as_u32[index] = code_point;
else
m_code_points.as_u8[index] = code_point;
}
bool is_dirty() const { return m_dirty; }
void set_dirty(bool b) { m_dirty = b; }
const Attribute* attributes() const { return m_attributes; }
Attribute* attributes() { return m_attributes; }
void convert_to_utf32();
bool is_utf32() const { return m_utf32; }
private:
union {
u8* as_u8;
u32* as_u32;
} m_code_points { nullptr };
Attribute* m_attributes { nullptr };
bool m_dirty { false };
bool m_utf32 { false };
u16 m_length { 0 };
};
}
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