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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/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>
#include <LibWeb/Page/Frame.h>
namespace Web::Layout {
TableFormattingContext::TableFormattingContext(Box& context_box, FormattingContext* parent)
: BlockFormattingContext(context_box, parent)
{
}
TableFormattingContext::~TableFormattingContext()
{
}
void TableFormattingContext::run(Box& box, LayoutMode)
{
compute_width(box);
float total_content_height = 0;
box.for_each_child_of_type<TableRowGroupBox>([&](auto& 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_height = 0;
row_group_box.template for_each_child_of_type<TableRowBox>([&](auto& row) {
row.set_offset(0, content_height);
layout_row(row, column_widths);
content_height += row.height();
});
row_group_box.set_height(content_height);
row_group_box.set_offset(0, total_content_height);
total_content_height += content_height;
});
// FIXME: This is a total hack, we should respect the 'height' property.
box.set_height(total_content_height);
}
void TableFormattingContext::calculate_column_widths(Box& row, Vector<float>& column_widths)
{
size_t column_index = 0;
auto* table = row.first_ancestor_of_type<TableBox>();
bool use_auto_layout = !table || table->computed_values().width().is_undefined_or_auto();
row.for_each_child_of_type<TableCellBox>([&](auto& cell) {
compute_width(cell);
if (use_auto_layout) {
layout_inside(cell, LayoutMode::OnlyRequiredLineBreaks);
} else {
layout_inside(cell, LayoutMode::Default);
}
column_widths[column_index] = max(column_widths[column_index], cell.width());
column_index += cell.colspan();
});
}
void TableFormattingContext::layout_row(Box& row, Vector<float>& column_widths)
{
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().is_undefined_or_auto();
row.for_each_child_of_type<TableCellBox>([&](auto& cell) {
cell.set_offset(row.effective_offset().translated(content_width, 0));
// Layout the cell contents a second time, now that we know its final width.
if (use_auto_layout) {
layout_inside(cell, LayoutMode::OnlyRequiredLineBreaks);
} else {
layout_inside(cell, LayoutMode::Default);
}
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.height());
});
if (use_auto_layout) {
row.set_width(content_width);
} else {
row.set_width(table->width());
}
row.set_height(tallest_cell_height);
}
}
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