/*
 * Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
 * Copyright (c) 2023, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <AK/Utf16View.h>
#include <LibJS/Runtime/Completion.h>
#include <LibJS/Runtime/Utf16String.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/Layout/SVGTextBox.h>
#include <LibWeb/SVG/AttributeNames.h>
#include <LibWeb/SVG/AttributeParser.h>
#include <LibWeb/SVG/SVGGeometryElement.h>
#include <LibWeb/SVG/SVGTextContentElement.h>

namespace Web::SVG {

SVGTextContentElement::SVGTextContentElement(DOM::Document& document, DOM::QualifiedName qualified_name)
    : SVGGraphicsElement(document, move(qualified_name))
{
}

JS::ThrowCompletionOr<void> SVGTextContentElement::initialize(JS::Realm& realm)
{
    MUST_OR_THROW_OOM(Base::initialize(realm));
    set_prototype(&Bindings::ensure_web_prototype<Bindings::SVGTextContentElementPrototype>(realm, "SVGTextContentElement"));

    return {};
}

void SVGTextContentElement::parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value)
{
    SVGGraphicsElement::parse_attribute(name, value);

    if (name == SVG::AttributeNames::x) {
        m_x = AttributeParser::parse_coordinate(value).value_or(m_x);
    } else if (name == SVG::AttributeNames::y) {
        m_y = AttributeParser::parse_coordinate(value).value_or(m_y);
    } else if (name == SVG::AttributeNames::dx) {
        m_dx = AttributeParser::parse_coordinate(value).value_or(m_dx);
    } else if (name == SVG::AttributeNames::dy) {
        m_dy = AttributeParser::parse_coordinate(value).value_or(m_dy);
    }
}

JS::GCPtr<Layout::Node> SVGTextContentElement::create_layout_node(NonnullRefPtr<CSS::StyleProperties> style)
{
    return heap().allocate_without_realm<Layout::SVGTextBox>(document(), *this, move(style));
}

// https://svgwg.org/svg2-draft/text.html#__svg__SVGTextContentElement__getNumberOfChars
WebIDL::ExceptionOr<int> SVGTextContentElement::get_number_of_chars() const
{
    auto chars = TRY_OR_THROW_OOM(vm(), utf8_to_utf16(child_text_content()));
    return static_cast<int>(chars.size());
}

Gfx::FloatPoint SVGTextContentElement::get_offset() const
{
    return { m_x + m_dx, m_y + m_dy };
}

}