LayoutFarm.Text.EditableTextRun.EvaluateFontAndTextColor C# (CSharp) Method

        static int EvaluateFontAndTextColor(Canvas canvas, TextSpanStyle spanStyle)
        {
            var font = spanStyle.FontInfo;
            var color = spanStyle.FontColor;
            var currentTextFont = canvas.CurrentFont;
            var currentTextColor = canvas.CurrentTextColor;
            if (font != null && font != currentTextFont)
            {
                if (currentTextColor != color)
                {
                    return DIFF_FONT_DIFF_TEXT_COLOR;
                }
                else
                {
                    return DIFF_FONT_SAME_TEXT_COLOR;
                }
            }
            else
            {
                if (currentTextColor != color)
                {
                    return SAME_FONT_DIFF_TEXT_COLOR;
                }
                else
                {
                    return SAME_FONT_SAME_TEXT_COLOR;
                }
            }
        }
        protected bool HasStyle