/**
 * @file Label.cpp
 * @author apio (cloudapio.eu)
 * @brief A simple one-line text widget.
 *
 * @copyright Copyright (c) 2023, the Luna authors.
 *
 */

#include <luna/Utf8.h>
#include <ui/Label.h>

namespace ui
{
    Label::Label(StringView text, VerticalAlignment valign, HorizontalAlignment halign, SharedPtr<Font> font)
        : m_text(text), m_valign(valign), m_halign(halign), m_font(font)
    {
    }

    Result<void> Label::draw(Canvas& canvas)
    {
        ui::Rect contained;
        contained.pos = { 0, 0 };
        contained.width = static_cast<int>(m_text.length() * m_font->width());
        contained.height = m_font->height();
        auto subcanvas =
            canvas.subcanvas(ui::align({ 0, 0, m_rect.width, m_rect.height }, contained, m_valign, m_halign));

        Utf8StringDecoder decoder(m_text.chars());
        wchar_t buf[4096];
        TRY(decoder.decode(buf, sizeof(buf)));

        m_font->render(buf, ui::BLACK, subcanvas);
        return {};
    }
}