jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#pragma once
8
9#include <LibGfx/Rect.h>
10#include <LibWeb/Forward.h>
11#include <LibWeb/PixelUnits.h>
12
13namespace Web::Layout {
14
15class LineBoxFragment {
16 friend class LineBox;
17
18public:
19 enum class Type {
20 Normal,
21 Leading,
22 Trailing,
23 };
24
25 LineBoxFragment(Node const& layout_node, int start, int length, CSSPixelPoint offset, CSSPixelSize size, CSSPixels border_box_top, CSSPixels border_box_bottom, Type type)
26 : m_layout_node(layout_node)
27 , m_start(start)
28 , m_length(length)
29 , m_offset(offset)
30 , m_size(size)
31 , m_border_box_top(border_box_top)
32 , m_border_box_bottom(border_box_bottom)
33 , m_type(type)
34 {
35 }
36
37 Node const& layout_node() const { return m_layout_node; }
38 int start() const { return m_start; }
39 int length() const { return m_length; }
40 CSSPixelRect const absolute_rect() const;
41 Type type() const { return m_type; }
42
43 CSSPixelPoint offset() const
44 {
45 return m_offset;
46 }
47 void set_offset(CSSPixelPoint offset) { m_offset = offset; }
48
49 // The baseline of a fragment is the number of pixels from the top to the text baseline.
50 void set_baseline(CSSPixels y) { m_baseline = y; }
51 CSSPixels baseline() const { return m_baseline; }
52
53 CSSPixelSize size() const
54 {
55 return m_size;
56 }
57 void set_width(CSSPixels width) { m_size.set_width(width); }
58 void set_height(CSSPixels height) { m_size.set_height(height); }
59 CSSPixels width() const { return m_size.width(); }
60 CSSPixels height() const { return m_size.height(); }
61
62 CSSPixels border_box_height() const
63 {
64 return m_border_box_top + height() + m_border_box_bottom;
65 }
66 CSSPixels border_box_top() const { return m_border_box_top; }
67 CSSPixels border_box_bottom() const { return m_border_box_bottom; }
68
69 CSSPixels absolute_x() const { return absolute_rect().x(); }
70
71 bool ends_in_whitespace() const;
72 bool is_justifiable_whitespace() const;
73 StringView text() const;
74
75 int text_index_at(CSSPixels x) const;
76
77 CSSPixelRect selection_rect(Gfx::Font const&) const;
78
79private:
80 Node const& m_layout_node;
81 int m_start { 0 };
82 int m_length { 0 };
83 CSSPixelPoint m_offset;
84 CSSPixelSize m_size;
85 CSSPixels m_border_box_top { 0 };
86 CSSPixels m_border_box_bottom { 0 };
87 CSSPixels m_baseline { 0 };
88 Type m_type { Type::Normal };
89};
90
91}