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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/DOM/Node.h>
#include <LibWeb/HTML/BrowsingContext.h>
#include <LibWeb/Layout/Box.h>
#include <LibWeb/Layout/InlineFormattingContext.h>
#include <LibWeb/Layout/TableBox.h>
#include <LibWeb/Layout/TableCellBox.h>
#include <LibWeb/Layout/TableFormattingContext.h>
#include <LibWeb/Layout/TableRowBox.h>
#include <LibWeb/Layout/TableRowGroupBox.h>
namespace Web::Layout {
TableFormattingContext::TableFormattingContext(FormattingState& state, BlockContainer const& block_container, FormattingContext* parent)
: BlockFormattingContext(state, block_container, parent)
{
}
TableFormattingContext::~TableFormattingContext() = default;
void TableFormattingContext::run(Box const& box, LayoutMode)
{
auto& box_state = m_state.get_mutable(box);
compute_width(box);
float total_content_width = 0;
float total_content_height = 0;
box.for_each_child_of_type<TableRowGroupBox>([&](auto& row_group_box) {
auto& row_group_box_state = m_state.get_mutable(row_group_box);
compute_width(row_group_box);
auto column_count = row_group_box.column_count();
Vector<float> column_widths;
column_widths.resize(column_count);
row_group_box.template for_each_child_of_type<TableRowBox>([&](auto& row) {
calculate_column_widths(row, column_widths);
});
float content_width = 0;
float content_height = 0;
row_group_box.template for_each_child_of_type<TableRowBox>([&](auto& row) {
auto& row_state = m_state.get_mutable(row);
row_state.offset = { 0, content_height };
layout_row(row, column_widths);
content_width = max(content_width, row_state.content_width);
content_height += row_state.content_height;
});
if (row_group_box.computed_values().width().has_value() && row_group_box.computed_values().width()->is_length() && row_group_box.computed_values().width()->length().is_auto())
row_group_box_state.content_width = content_width;
row_group_box_state.content_height = content_height;
row_group_box_state.offset = { 0, total_content_height };
total_content_height += content_height;
total_content_width = max(total_content_width, row_group_box_state.content_width);
});
if (box.computed_values().width().has_value() && box.computed_values().width()->is_length() && box.computed_values().width()->length().is_auto())
box_state.content_width = total_content_width;
// FIXME: This is a total hack, we should respect the 'height' property.
box_state.content_height = total_content_height;
}
void TableFormattingContext::calculate_column_widths(Box const& row, Vector<float>& column_widths)
{
m_state.get_mutable(row);
size_t column_index = 0;
auto* table = row.first_ancestor_of_type<TableBox>();
bool use_auto_layout = !table || (!table->computed_values().width().has_value() || (table->computed_values().width()->is_length() && table->computed_values().width()->length().is_auto()));
row.for_each_child_of_type<TableCellBox>([&](auto& cell) {
auto& cell_state = m_state.get_mutable(cell);
compute_width(cell);
if (use_auto_layout) {
(void)layout_inside(cell, LayoutMode::OnlyRequiredLineBreaks);
} else {
(void)layout_inside(cell, LayoutMode::Default);
}
column_widths[column_index] = max(column_widths[column_index], cell_state.content_width);
column_index += cell.colspan();
});
}
void TableFormattingContext::layout_row(Box const& row, Vector<float>& column_widths)
{
auto& row_state = m_state.get_mutable(row);
size_t column_index = 0;
float tallest_cell_height = 0;
float content_width = 0;
auto* table = row.first_ancestor_of_type<TableBox>();
bool use_auto_layout = !table || (!table->computed_values().width().has_value() || (table->computed_values().width()->is_length() && table->computed_values().width()->length().is_auto()));
row.for_each_child_of_type<TableCellBox>([&](auto& cell) {
auto& cell_state = m_state.get_mutable(cell);
cell_state.offset = row_state.offset.translated(content_width, 0);
// Layout the cell contents a second time, now that we know its final width.
if (use_auto_layout) {
(void)layout_inside(cell, LayoutMode::OnlyRequiredLineBreaks);
} else {
(void)layout_inside(cell, LayoutMode::Default);
}
BlockFormattingContext::compute_height(cell, m_state);
size_t cell_colspan = cell.colspan();
for (size_t i = 0; i < cell_colspan; ++i)
content_width += column_widths[column_index++];
tallest_cell_height = max(tallest_cell_height, cell_state.content_height);
});
if (use_auto_layout) {
row_state.content_width = content_width;
} else {
auto& table_state = m_state.get_mutable(*table);
row_state.content_width = table_state.content_width;
}
row_state.content_height = tallest_cell_height;
}
}
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