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LibVT: Make VT::Line use a Vector for storage

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This is preparation for non-destructive terminal resizing which will
require more dynamic storage for lines.
This commit is contained in:
Andreas Kling 2021-02-26 20:28:22 +01:00
parent c58570ebaf
commit b7c66233f6
5 changed files with 60 additions and 123 deletions
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53
Userland/Libraries/LibVT/Line.h
View file

@ -28,6 +28,7 @@
#include <AK/Noncopyable.h>
#include <AK/String.h>
#include <AK/Vector.h>
#include <LibVT/XtermColors.h>
namespace VT {
@ -44,8 +45,8 @@ struct Attribute {
background_color = default_background_color;
flags = Flags::NoAttributes;
}
u32 foreground_color;
u32 background_color;
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; }
@ -84,52 +85,42 @@ class Line {
AK_MAKE_NONMOVABLE(Line);
public:
explicit Line(u16 columns);
explicit Line(size_t length);
~Line();
void clear(Attribute);
bool has_only_one_background_color() const;
void set_length(u16);
struct Cell {
u32 code_point {};
Attribute attribute;
};
u16 length() const { return m_length; }
const Attribute& attribute_at(size_t index) const { return m_cells[index].attribute; }
Attribute& attribute_at(size_t index) { return m_cells[index].attribute; }
Cell& cell_at(size_t index) { return m_cells[index]; }
const Cell& cell_at(size_t index) const { return m_cells[index]; }
void clear(const Attribute&);
bool has_only_one_background_color() const;
size_t length() const { return m_cells.size(); }
void set_length(size_t);
u32 code_point(size_t index) const
{
if (m_utf32)
return m_code_points.as_u32[index];
return m_code_points.as_u8[index];
return m_cells[index].code_point;
}
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;
m_cells[index].code_point = 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 };
Vector<Cell> m_cells;
bool m_dirty { false };
bool m_utf32 { false };
u16 m_length { 0 };
};
}