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/*
* 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 <LibGUI/GPainter.h>
#include <LibHTML/DOM/Document.h>
#include <LibHTML/DOM/Element.h>
#include <LibHTML/Frame.h>
#include <LibHTML/Layout/LayoutBlock.h>
#include <LibHTML/Layout/LayoutNode.h>
LayoutNode::LayoutNode(const Node* node)
: m_node(node)
{
if (m_node)
m_node->set_layout_node({}, this);
}
LayoutNode::~LayoutNode()
{
if (m_node && m_node->layout_node() == this)
m_node->set_layout_node({}, nullptr);
}
void LayoutNode::layout()
{
for_each_child([](auto& child) {
child.layout();
});
}
const LayoutBlock* LayoutNode::containing_block() const
{
for (auto* ancestor = parent(); ancestor; ancestor = ancestor->parent()) {
if (is<LayoutBlock>(*ancestor))
return to<LayoutBlock>(ancestor);
}
return nullptr;
}
void LayoutNode::render(RenderingContext& context)
{
if (!is_visible())
return;
// TODO: render our border
for_each_child([&](auto& child) {
child.render(context);
});
}
HitTestResult LayoutNode::hit_test(const Point& position) const
{
HitTestResult result;
for_each_child([&](auto& child) {
auto child_result = child.hit_test(position);
if (child_result.layout_node)
result = child_result;
});
return result;
}
const Document& LayoutNode::document() const
{
if (is_anonymous())
return parent()->document();
return node()->document();
}
Document& LayoutNode::document()
{
if (is_anonymous())
return parent()->document();
// FIXME: Remove this const_cast once we give up on the idea of a const link from layout tree to DOM tree.
return const_cast<Node*>(node())->document();
}
const LayoutDocument& LayoutNode::root() const
{
ASSERT(document().layout_node());
return *document().layout_node();
}
LayoutDocument& LayoutNode::root()
{
ASSERT(document().layout_node());
return *document().layout_node();
}
void LayoutNode::split_into_lines(LayoutBlock& container)
{
for_each_child([&](auto& child) {
if (child.is_inline()) {
child.split_into_lines(container);
} else {
// FIXME: Support block children of inlines.
}
});
}
void LayoutNode::set_needs_display()
{
auto* frame = document().frame();
ASSERT(frame);
if (auto* block = containing_block()) {
block->for_each_fragment([&](auto& fragment) {
if (&fragment.layout_node() == this || is_ancestor_of(fragment.layout_node())) {
const_cast<Frame*>(frame)->set_needs_display(enclosing_int_rect(fragment.rect()));
}
return IterationDecision::Continue;
});
}
}
FloatPoint LayoutNode::box_type_agnostic_position() const
{
if (is_box())
return to<LayoutBox>(*this).position();
ASSERT(is_inline());
FloatPoint position;
if (auto* block = containing_block()) {
block->for_each_fragment([&](auto& fragment) {
if (&fragment.layout_node() == this || is_ancestor_of(fragment.layout_node())) {
position = fragment.rect().location();
return IterationDecision::Break;
}
return IterationDecision::Continue;
});
}
return position;
}
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