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/*
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Dump.h>
#include <LibWeb/Layout/InitialContainingBlock.h>
#include <LibWeb/Painting/PaintableBox.h>
#include <LibWeb/Painting/StackingContext.h>
namespace Web::Layout {
InitialContainingBlock::InitialContainingBlock(DOM::Document& document, NonnullRefPtr<CSS::StyleProperties> style)
: BlockContainer(document, &document, move(style))
{
}
InitialContainingBlock::~InitialContainingBlock() = default;
void InitialContainingBlock::build_stacking_context_tree_if_needed()
{
if (paint_box()->stacking_context())
return;
build_stacking_context_tree();
}
void InitialContainingBlock::build_stacking_context_tree()
{
const_cast<Painting::PaintableWithLines*>(paint_box())->set_stacking_context(make<Painting::StackingContext>(*this, nullptr));
for_each_in_subtree_of_type<Box>([&](Box& box) {
if (!box.paint_box())
return IterationDecision::Continue;
const_cast<Painting::PaintableBox*>(box.paint_box())->invalidate_stacking_context();
if (!box.establishes_stacking_context()) {
VERIFY(!box.paint_box()->stacking_context());
return IterationDecision::Continue;
}
auto* parent_context = const_cast<Painting::PaintableBox*>(box.paint_box())->enclosing_stacking_context();
VERIFY(parent_context);
const_cast<Painting::PaintableBox*>(box.paint_box())->set_stacking_context(make<Painting::StackingContext>(box, parent_context));
return IterationDecision::Continue;
});
const_cast<Painting::PaintableWithLines*>(paint_box())->stacking_context()->sort();
}
void InitialContainingBlock::paint_all_phases(PaintContext& context)
{
build_stacking_context_tree_if_needed();
context.painter().fill_rect(enclosing_int_rect(paint_box()->absolute_rect()), document().background_color(context.palette()));
context.painter().translate(-context.viewport_rect().location());
paint_box()->stacking_context()->paint(context);
}
void InitialContainingBlock::recompute_selection_states()
{
SelectionState state = SelectionState::None;
auto selection = this->selection().normalized();
for_each_in_inclusive_subtree([&](auto& layout_node) {
if (!selection.is_valid()) {
// Everything gets SelectionState::None.
} else if (&layout_node == selection.start().layout_node && &layout_node == selection.end().layout_node) {
state = SelectionState::StartAndEnd;
} else if (&layout_node == selection.start().layout_node) {
state = SelectionState::Start;
} else if (&layout_node == selection.end().layout_node) {
state = SelectionState::End;
} else {
if (state == SelectionState::Start)
state = SelectionState::Full;
else if (state == SelectionState::End || state == SelectionState::StartAndEnd)
state = SelectionState::None;
}
layout_node.set_selection_state(state);
return IterationDecision::Continue;
});
}
void InitialContainingBlock::set_selection(LayoutRange const& selection)
{
m_selection = selection;
recompute_selection_states();
}
void InitialContainingBlock::set_selection_end(LayoutPosition const& position)
{
m_selection.set_end(position);
recompute_selection_states();
}
}
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