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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*
* 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.
*/
#include <LibGfx/Painter.h>
#include <LibWeb/CSS/StyleResolver.h>
#include <LibWeb/Dump.h>
#include <LibWeb/Layout/BlockBox.h>
#include <LibWeb/Layout/InitialContainingBlockBox.h>
#include <LibWeb/Layout/InlineFormattingContext.h>
#include <LibWeb/Layout/ReplacedBox.h>
#include <LibWeb/Layout/TextNode.h>
namespace Web::Layout {
BlockBox::BlockBox(DOM::Document& document, DOM::Node* node, NonnullRefPtr<CSS::StyleProperties> style)
: Box(document, node, move(style))
{
}
BlockBox::BlockBox(DOM::Document& document, DOM::Node* node, CSS::ComputedValues computed_values)
: Box(document, node, move(computed_values))
{
}
BlockBox::~BlockBox()
{
}
bool BlockBox::should_clip_overflow() const
{
return computed_values().overflow_x() != CSS::Overflow::Visible && computed_values().overflow_y() != CSS::Overflow::Visible;
}
void BlockBox::paint(PaintContext& context, PaintPhase phase)
{
if (!is_visible())
return;
Box::paint(context, phase);
if (!children_are_inline())
return;
if (should_clip_overflow()) {
context.painter().save();
// FIXME: Handle overflow-x and overflow-y being different values.
context.painter().add_clip_rect(enclosing_int_rect(padded_rect()));
context.painter().translate(-m_scroll_offset.to_type<int>());
}
for (auto& line_box : m_line_boxes) {
for (auto& fragment : line_box.fragments()) {
if (context.should_show_line_box_borders())
context.painter().draw_rect(enclosing_int_rect(fragment.absolute_rect()), Color::Green);
fragment.paint(context, phase);
}
}
if (should_clip_overflow()) {
context.painter().restore();
}
// FIXME: Merge this loop with the above somehow..
if (phase == PaintPhase::FocusOutline) {
for (auto& line_box : m_line_boxes) {
for (auto& fragment : line_box.fragments()) {
auto* node = fragment.layout_node().dom_node();
if (!node)
continue;
auto* parent = node->parent_element();
if (!parent)
continue;
if (parent->is_focused())
context.painter().draw_rect(enclosing_int_rect(fragment.absolute_rect()), context.palette().focus_outline());
}
}
}
}
HitTestResult BlockBox::hit_test(const Gfx::IntPoint& position, HitTestType type) const
{
if (!children_are_inline())
return Box::hit_test(position, type);
HitTestResult last_good_candidate;
for (auto& line_box : m_line_boxes) {
for (auto& fragment : line_box.fragments()) {
if (is<Box>(fragment.layout_node()) && downcast<Box>(fragment.layout_node()).stacking_context())
continue;
if (enclosing_int_rect(fragment.absolute_rect()).contains(position)) {
if (is<BlockBox>(fragment.layout_node()))
return downcast<BlockBox>(fragment.layout_node()).hit_test(position, type);
return { fragment.layout_node(), fragment.text_index_at(position.x()) };
}
if (fragment.absolute_rect().top() <= position.y())
last_good_candidate = { fragment.layout_node(), fragment.text_index_at(position.x()) };
}
}
if (type == HitTestType::TextCursor && last_good_candidate.layout_node)
return last_good_candidate;
return { absolute_rect().contains(position.x(), position.y()) ? this : nullptr };
}
void BlockBox::split_into_lines(InlineFormattingContext& context, LayoutMode layout_mode)
{
auto& containing_block = context.containing_block();
auto* line_box = &containing_block.ensure_last_line_box();
context.dimension_box_on_line(*this, layout_mode);
float available_width = context.available_width_at_line(containing_block.line_boxes().size() - 1);
if (layout_mode == LayoutMode::AllPossibleLineBreaks && line_box->width() > 0) {
line_box = &containing_block.add_line_box();
} else if (layout_mode == LayoutMode::Default && line_box->width() > 0 && line_box->width() + border_box_width() > available_width) {
line_box = &containing_block.add_line_box();
}
line_box->add_fragment(*this, 0, 0, border_box_width(), height());
}
bool BlockBox::is_scrollable() const
{
// FIXME: Support horizontal scroll as well (overflow-x)
return computed_values().overflow_y() == CSS::Overflow::Scroll;
}
void BlockBox::set_scroll_offset(const Gfx::FloatPoint& offset)
{
// FIXME: If there is horizontal and vertical scroll ignore only part of the new offset
if (offset.y() < 0 || m_scroll_offset == offset)
return;
m_scroll_offset = offset;
set_needs_display();
}
bool BlockBox::handle_mousewheel(Badge<EventHandler>, const Gfx::IntPoint&, unsigned int, unsigned int, int wheel_delta)
{
if (!is_scrollable())
return false;
auto new_offset = m_scroll_offset;
new_offset.move_by(0, wheel_delta);
set_scroll_offset(new_offset);
return true;
}
}
|
