blob: 849fe7bcf1f0fe0a3a53f024a7b8c684bc8edf63 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibGUI/Command.h>
#include <LibGUI/UndoStack.h>
#include <LibGfx/BitmapFont.h>
class UndoGlyph : public RefCounted<UndoGlyph> {
public:
explicit UndoGlyph(u32 const code_point, Gfx::BitmapFont const& font)
: m_code_point(code_point)
, m_font(font)
{
}
NonnullRefPtr<UndoGlyph> save_state() const
{
auto state = adopt_ref(*new UndoGlyph(m_code_point, *m_font));
auto glyph = font().glyph(m_code_point).glyph_bitmap();
for (int x = 0; x < font().max_glyph_width(); x++)
for (int y = 0; y < font().glyph_height(); y++)
state->m_bits[x][y] = glyph.bit_at(x, y);
state->m_width = glyph.width();
return state;
}
void restore_state(UndoGlyph const& state) const
{
auto bitmap = font().glyph(state.m_code_point).glyph_bitmap();
for (int x = 0; x < font().max_glyph_width(); x++)
for (int y = 0; y < font().glyph_height(); y++)
bitmap.set_bit_at(x, y, state.m_bits[x][y]);
m_restored_width = state.m_width;
m_restored_code_point = state.m_code_point;
}
void set_code_point(u32 code_point) { m_code_point = code_point; }
void set_font(Gfx::BitmapFont& font) { m_font = font; }
Gfx::BitmapFont const& font() const { return *m_font; }
u8 restored_width() const { return m_restored_width; }
u32 restored_code_point() const { return m_restored_code_point; }
private:
u32 m_code_point { 0 };
RefPtr<Gfx::BitmapFont> m_font;
u8 m_bits[Gfx::GlyphBitmap::max_width()][Gfx::GlyphBitmap::max_height()] {};
u8 m_width { 0 };
mutable u8 m_restored_width { 0 };
mutable u32 m_restored_code_point { 0 };
};
class GlyphUndoCommand : public GUI::Command {
public:
GlyphUndoCommand(UndoGlyph& glyph)
: m_undo_state(glyph.save_state())
, m_undo_glyph(glyph)
{
}
virtual void undo() override
{
if (!m_redo_state)
m_redo_state = m_undo_state->save_state();
m_undo_glyph.restore_state(*m_undo_state);
}
virtual void redo() override
{
m_undo_glyph.restore_state(*m_redo_state);
}
private:
NonnullRefPtr<UndoGlyph> m_undo_state;
RefPtr<UndoGlyph> m_redo_state;
UndoGlyph& m_undo_glyph;
};
|
