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/*
* Copyright (c) 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 <AK/QuickSort.h>
#include <AK/StringBuilder.h>
#include <LibWeb/DOM/Node.h>
#include <LibWeb/Layout/Box.h>
#include <LibWeb/Layout/InitialContainingBlockBox.h>
#include <LibWeb/Painting/StackingContext.h>
namespace Web::Layout {
StackingContext::StackingContext(Box& box, StackingContext* parent)
: m_box(box)
, m_parent(parent)
{
VERIFY(m_parent != this);
if (m_parent) {
m_parent->m_children.append(this);
// FIXME: Don't sort on every append..
quick_sort(m_parent->m_children, [](auto& a, auto& b) {
return a->m_box.computed_values().z_index().value_or(0) < b->m_box.computed_values().z_index().value_or(0);
});
}
}
void StackingContext::paint(PaintContext& context, PaintPhase phase)
{
if (!is<InitialContainingBlockBox>(m_box)) {
m_box.paint(context, phase);
} else {
// NOTE: InitialContainingBlockBox::paint() merely calls StackingContext::paint()
// so we call its base class instead.
downcast<InitialContainingBlockBox>(m_box).BlockBox::paint(context, phase);
}
for (auto* child : m_children) {
child->paint(context, phase);
}
}
HitTestResult StackingContext::hit_test(const Gfx::IntPoint& position, HitTestType type) const
{
HitTestResult result;
if (!is<InitialContainingBlockBox>(m_box)) {
result = m_box.hit_test(position, type);
} else {
// NOTE: InitialContainingBlockBox::hit_test() merely calls StackingContext::hit_test()
// so we call its base class instead.
result = downcast<InitialContainingBlockBox>(m_box).BlockBox::hit_test(position, type);
}
int z_index = m_box.computed_values().z_index().value_or(0);
for (auto* child : m_children) {
int child_z_index = child->m_box.computed_values().z_index().value_or(0);
if (result.layout_node && (child_z_index < z_index))
continue;
auto result_here = child->hit_test(position, type);
if (result_here.layout_node)
result = result_here;
}
return result;
}
void StackingContext::dump(int indent) const
{
StringBuilder builder;
for (int i = 0; i < indent; ++i)
builder.append(' ');
builder.appendff("SC for {}({}) {} [children: {}]", m_box.class_name(), m_box.dom_node() ? m_box.dom_node()->node_name().characters() : "(anonymous)", m_box.absolute_rect().to_string().characters(), m_children.size());
dbgln("{}", builder.string_view());
for (auto& child : m_children)
child->dump(indent + 1);
}
}
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