// -----------------------------------------------------------------------
// <copyright file="CairoExtensions.cs" company="Steven Kirk">
// Copyright 2014 MIT Licence. See licence.md for more information.
// </copyright>
// -----------------------------------------------------------------------

namespace Perspex.Cairo
{
    using Cairo = global::Cairo;

    public static class CairoExtensions
    {
        public static Cairo.Matrix ToCairo(this Matrix m)
        {
            return new Cairo.Matrix(m.M11, m.M12, m.M21, m.M22, m.OffsetX, m.OffsetY);
        }

        public static Cairo.PointD ToCairo(this Point p)
        {
            return new Cairo.PointD(p.X, p.Y);
        }

        public static Cairo.Rectangle ToCairo(this Rect rect)
        {
            return new Cairo.Rectangle(rect.X, rect.Y, rect.Width, rect.Height);
        }

        public static Rect ToPerspex(this Pango.Rectangle rect)
        {
            return new Rect(
                Pango.Units.ToDouble(rect.X),
                Pango.Units.ToDouble(rect.Y),
                Pango.Units.ToDouble(rect.Width),
                Pango.Units.ToDouble(rect.Height));
        }

        public static Pango.Weight ToCairo(this Perspex.Media.FontWeight weight)
        {
            if (weight == Perspex.Media.FontWeight.Light)
            {
                return Pango.Weight.Light;
            }

            if (weight == Perspex.Media.FontWeight.Normal || weight == Perspex.Media.FontWeight.Regular)
            {
                return Pango.Weight.Normal;
            }

            if (weight == Perspex.Media.FontWeight.DemiBold || weight == Perspex.Media.FontWeight.Medium)
            {
                return Pango.Weight.Semibold;
            }

            if (weight == Perspex.Media.FontWeight.Bold)
            {
                return Pango.Weight.Bold;
            }

            if (weight == Perspex.Media.FontWeight.UltraBold || weight == Perspex.Media.FontWeight.ExtraBold)
            {
                return Pango.Weight.Ultrabold;
            }

            if (weight == Perspex.Media.FontWeight.Black || weight == Perspex.Media.FontWeight.Heavy || weight == Perspex.Media.FontWeight.UltraBlack)
            {
                return Pango.Weight.Heavy;
            }

            return Pango.Weight.Ultralight;
        }

        public static Pango.Alignment ToCairo(this Perspex.Media.TextAlignment alignment)
        {
            if (alignment == Perspex.Media.TextAlignment.Left)
            {
                return Pango.Alignment.Left;
            }

            if (alignment == Perspex.Media.TextAlignment.Center)
            {
                return Pango.Alignment.Center;
            }

            return Pango.Alignment.Right;
        }
    }
}