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LibWeb: Rename FormattingState to LayoutState

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This seems a bit more descriptive (and also a bit shorter).
This commit is contained in:
Andreas Kling 2022-07-16 23:30:32 +02:00
parent 0d8f9019c8
commit 52862c72d0
25 changed files with 95 additions and 95 deletions
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128
Userland/Libraries/LibWeb/Layout/LayoutState.cpp Normal file
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/*
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Layout/BlockContainer.h>
#include <LibWeb/Layout/LayoutState.h>
#include <LibWeb/Layout/TextNode.h>
namespace Web::Layout {
LayoutState::NodeState& LayoutState::get_mutable(NodeWithStyleAndBoxModelMetrics const& box)
{
auto serial_id = box.serial_id();
if (nodes[serial_id])
return *nodes[serial_id];
for (auto const* ancestor = m_parent; ancestor; ancestor = ancestor->m_parent) {
if (ancestor->nodes[serial_id]) {
auto cow_node_state = adopt_own(*new NodeState(*ancestor->nodes[serial_id]));
auto* cow_node_state_ptr = cow_node_state.ptr();
nodes[serial_id] = move(cow_node_state);
return *cow_node_state_ptr;
}
}
nodes[serial_id] = adopt_own(*new NodeState);
nodes[serial_id]->node = const_cast<NodeWithStyleAndBoxModelMetrics*>(&box);
return *nodes[serial_id];
}
LayoutState::NodeState const& LayoutState::get(NodeWithStyleAndBoxModelMetrics const& box) const
{
auto serial_id = box.serial_id();
if (nodes[serial_id])
return *nodes[serial_id];
for (auto* ancestor = m_parent; ancestor; ancestor = ancestor->m_parent) {
if (ancestor->nodes[serial_id])
return *ancestor->nodes[serial_id];
}
const_cast<LayoutState*>(this)->nodes[serial_id] = adopt_own(*new NodeState);
const_cast<LayoutState*>(this)->nodes[serial_id]->node = const_cast<NodeWithStyleAndBoxModelMetrics*>(&box);
return *nodes[serial_id];
}
void LayoutState::commit()
{
// Only the top-level LayoutState should ever be committed.
VERIFY(!m_parent);
HashTable<Layout::TextNode*> text_nodes;
for (auto& node_state_ptr : nodes) {
if (!node_state_ptr)
continue;
auto& node_state = *node_state_ptr;
auto& node = *node_state.node;
// Transfer box model metrics.
node.box_model().inset = { node_state.inset_top, node_state.inset_right, node_state.inset_bottom, node_state.inset_left };
node.box_model().padding = { node_state.padding_top, node_state.padding_right, node_state.padding_bottom, node_state.padding_left };
node.box_model().border = { node_state.border_top, node_state.border_right, node_state.border_bottom, node_state.border_left };
node.box_model().margin = { node_state.margin_top, node_state.margin_right, node_state.margin_bottom, node_state.margin_left };
node.set_paintable(node.create_paintable());
// For boxes, transfer all the state needed for painting.
if (is<Layout::Box>(node)) {
auto& box = static_cast<Layout::Box&>(node);
auto& paint_box = const_cast<Painting::PaintableBox&>(*box.paint_box());
paint_box.set_offset(node_state.offset);
paint_box.set_content_size(node_state.content_width, node_state.content_height);
paint_box.set_overflow_data(move(node_state.overflow_data));
paint_box.set_containing_line_box_fragment(node_state.containing_line_box_fragment);
if (is<Layout::BlockContainer>(box)) {
for (auto& line_box : node_state.line_boxes) {
for (auto& fragment : line_box.fragments()) {
if (fragment.layout_node().is_text_node())
text_nodes.set(static_cast<Layout::TextNode*>(const_cast<Layout::Node*>(&fragment.layout_node())));
}
}
static_cast<Painting::PaintableWithLines&>(paint_box).set_line_boxes(move(node_state.line_boxes));
}
}
}
for (auto* text_node : text_nodes)
text_node->set_paintable(text_node->create_paintable());
}
Gfx::FloatRect margin_box_rect(Box const& box, LayoutState const& state)
{
auto const& box_state = state.get(box);
auto rect = Gfx::FloatRect { box_state.offset, { box_state.content_width, box_state.content_height } };
rect.set_x(rect.x() - box_state.margin_box_left());
rect.set_width(rect.width() + box_state.margin_box_left() + box_state.margin_box_right());
rect.set_y(rect.y() - box_state.margin_box_top());
rect.set_height(rect.height() + box_state.margin_box_top() + box_state.margin_box_bottom());
return rect;
}
Gfx::FloatRect margin_box_rect_in_ancestor_coordinate_space(Box const& box, Box const& ancestor_box, LayoutState const& state)
{
auto rect = margin_box_rect(box, state);
for (auto const* current = box.parent(); current; current = current->parent()) {
if (current == &ancestor_box)
break;
if (is<Box>(*current)) {
auto const& current_state = state.get(static_cast<Box const&>(*current));
rect.translate_by(current_state.offset);
}
}
return rect;
}
Gfx::FloatRect absolute_content_rect(Box const& box, LayoutState const& state)
{
auto const& box_state = state.get(box);
Gfx::FloatRect rect { box_state.offset, { box_state.content_width, box_state.content_height } };
for (auto* block = box.containing_block(); block; block = block->containing_block())
rect.translate_by(state.get(*block).offset);
return rect;
}
}