/*
 * Copyright (c) 2018-2022, Andreas Kling <andreas@ladybird.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <LibWeb/DOM/Document.h>
#include <LibWeb/HTML/LocalNavigable.h>
#include <LibWeb/HTML/NavigableContainer.h>
#include <LibWeb/Layout/NavigableContainerViewport.h>
#include <LibWeb/Layout/Viewport.h>
#include <LibWeb/Page/Page.h>
#include <LibWeb/Painting/BorderRadiusCornerClipper.h>
#include <LibWeb/Painting/DisplayListRecorder.h>
#include <LibWeb/Painting/NavigableContainerViewportPaintable.h>

namespace Web::Painting {

NonnullRefPtr<NavigableContainerViewportPaintable> NavigableContainerViewportPaintable::create(Layout::NavigableContainerViewport const& layout_box)
{
    return adopt_ref(*new NavigableContainerViewportPaintable(layout_box));
}

NavigableContainerViewportPaintable::NavigableContainerViewportPaintable(Layout::NavigableContainerViewport const& layout_box)
    : Paintable(layout_box)
{
}

void NavigableContainerViewportPaintable::paint(DisplayListRecordingContext& context, PaintPhase phase) const
{
    if (!is_visible())
        return;

    Paintable::paint(context, phase);

    if (phase == PaintPhase::Foreground) {
        auto absolute_rect = this->absolute_rect();
        auto clip_rect = context.rounded_device_rect(absolute_rect);
        ScopedCornerRadiusClip corner_clip { context, clip_rect, normalized_border_radii_data(ShrinkRadiiForBorders::Yes) };

        auto const& navigable_container = this->navigable_container();
        auto content_navigable = navigable_container.content_navigable();
        VERIFY(content_navigable);
        auto& local_navigable = as<HTML::LocalNavigable>(*content_navigable);
        if (local_navigable.has_been_destroyed())
            return;

        auto context_id = document().page().client().compositor_context_id_for_remote_child_frame(content_navigable->id());
        if (!context_id.has_value()) {
            if (!local_navigable.has_compositor_context())
                return;

            auto* hosted_document = const_cast<DOM::Document*>(navigable_container.content_document_without_origin_check());
            if (hosted_document && hosted_document->is_render_blocked())
                return;

            context_id = local_navigable.compositor_context().id();
        }

        context.display_list_recorder().save();
        context.display_list_recorder().add_clip_rect(clip_rect.to_type<int>());
        context.display_list_recorder().draw_composited_context(
            context.enclosing_device_rect(absolute_rect).to_type<int>(),
            *context_id,
            Gfx::ScalingMode::NearestNeighbor);
        context.display_list_recorder().restore();

        if constexpr (HIGHLIGHT_FOCUSED_FRAME_DEBUG) {
            if (local_navigable.is_focused()) {
                context.display_list_recorder().draw_rect(clip_rect.to_type<int>(), Color::Cyan);
            }
        }
    }
}

}