/*
 * Copyright (c) 2021, 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 <LibWeb/Layout/BlockBox.h>
#include <LibWeb/Layout/Box.h>
#include <LibWeb/Layout/FlexFormattingContext.h>

namespace Web::Layout {

FlexFormattingContext::FlexFormattingContext(Box& context_box, FormattingContext* parent)
    : FormattingContext(context_box, parent)
{
}

FlexFormattingContext::~FlexFormattingContext()
{
}

void FlexFormattingContext::run(Box& box, LayoutMode layout_mode)
{
    // FIXME: This is *extremely* naive and only supports flex items laid out on a single horizontal line.

    // First, compute the width of each flex item.
    box.for_each_child_of_type<Box>([&](Box& child_box) {
        auto shrink_to_fit_result = calculate_shrink_to_fit_widths(child_box);
        auto shrink_to_fit_width = min(max(shrink_to_fit_result.preferred_minimum_width, 0.0f), shrink_to_fit_result.preferred_width);
        layout_inside(child_box, layout_mode);
        child_box.set_width(shrink_to_fit_width);
    });

    // Then, place the items on a line.
    float x = 0;
    box.for_each_child_of_type<Box>([&](Box& child_box) {
        child_box.set_offset(x, 0);
        x += child_box.border_box_width();
    });
}

}